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Update lua plugin to 5.2.3

Prior to this patch the Lua plugin used version 5.1.4. This change
reduces the number of modifications in the Lua source using some new
defines and because the upstream source is now more flexible.

Unless otherwise stated, l*.[ch] files are taken unmodified from the
upstream lua-5.2.3.

fscanf.c:
file descriptors in rockbox are just ints, they are hidden behind a
void* now so liolib requires less modifications. fscanf is updated to
use void* too.

getc.c: this is a new file required for getc implementation in lauxlib.c

lauxlib.c: LoadF replaced FILE* with int, the rockbox file
descriptor int are cast to FILE* (actually void* due to typedef).
getc uses the PREFIX version. stdin is not used, as per 5.1.4.

lbaselib.c: now uses strspn in the number parsing. print uses DEBUGF now
rather than being commented out.

lbitlib.c: use the built-in version from 5.2.3 rather than Reuben
Thomas's external library. Backwards compatible and adds some new bit
operations.

ldo.c: the LUAI_THROW/TRY defines are now in the core lua code, so have
been removed from rockconf.h

liolib.c: here the implementation has changed to use the LStream from
the original source, and cast the FILE* pointers to int. This has
reduced the number of modifications from the upstream version.

llex.c: the only change from upstream is to remove the locale include.

lmathlib.c: updated from the 5.2.3 version and re-applied the changes
that were made vs 5.1.4 for random numbers and to remove unsupported
float functions.

loadlib.c: upstream version, with the 5.1.4 changes for missing
functions.

lobject.c: upstream version, with ctype.h added and sprintf changed to
snprintf.

loslib.c: upstream version with locale.h removed and 5.1.4 changes for
unsupportable functions.

lstrlib.c: sprintf changed to snprintf.

ltable.c: upstream with the hashnum function from 5.1.4 to avoid frexp
in luai_hashnum.

luaconf.h: updated to 5.2.3 version, restored relevant parts from the
original 5.1.4 configuration. The COMPAT defines that are no longer
available are not included.

lundump.c: VERSION macro conflicts with the core Rockbox equivalent.

rocklib.c: luaL_reg is no longer available, replaced by luaL_Reg
equivalent. Moved checkboolean/optboolean functions to this file and out
of core lua files. luaL_getn is no longer available, replaced by
luaL_rawlen. luaL_register is deprecated, use the newlib/setfuncs
replacements. rli_init has to be called before setting up the newlib to
avoid overwriting the rb table.

rocklib_aux.pl: use rli_checkboolean from rocklib.c.

rocklua.c: new default bits library used, update the library loading
code with idiomatic 5.2 code.

strcspn.c: no longer needed, but strspn.c is required for strspn in
lbaselib.c

Change-Id: I0c7945c755f79083afe98ec117e1e8cf13de2651
Reviewed-on: http://gerrit.rockbox.org/774
Tested: Richard Quirk <richard.quirk@gmail.com>
Reviewed-by: Marcin Bukat <marcin.bukat@gmail.com>
This commit is contained in:
Richard Quirk 2014-03-19 19:31:31 +01:00 committed by Marcin Bukat
parent 020f16a1c7
commit 36378988ad
64 changed files with 9126 additions and 5771 deletions

View file

@ -31,12 +31,13 @@ rocklib.c
tlsf_helper.c tlsf_helper.c
fscanf.c fscanf.c
gmtime.c gmtime.c
strcspn.c strspn.c
strftime.c strftime.c
strncat.c strncat.c
strpbrk.c strpbrk.c
strtoul.c strtoul.c
strtol.c strtol.c
strstr.c strstr.c
getc.c
rocklua.c rocklua.c
luadir.c luadir.c

View file

@ -266,7 +266,7 @@ static int scan(int (*peek)(void *userp),
static int fspeek(void *userp) static int fspeek(void *userp)
{ {
int fd = *((int*) userp); int fd = ((int) userp);
char buf = 0; char buf = 0;
if(rb->read(fd, &buf, 1) == 1) if(rb->read(fd, &buf, 1) == 1)
rb->lseek(fd, -1, SEEK_CUR); rb->lseek(fd, -1, SEEK_CUR);
@ -275,11 +275,11 @@ static int fspeek(void *userp)
static void fspop(void *userp) static void fspop(void *userp)
{ {
int fd = *((int*) userp); int fd = ((int) userp);
rb->lseek(fd, 1, SEEK_CUR); rb->lseek(fd, 1, SEEK_CUR);
} }
int PREFIX(fscanf)(int fd, const char *fmt, ...) int PREFIX(fscanf)(void *fd, const char *fmt, ...)
{ {
int r; int r;
va_list ap; va_list ap;

10
apps/plugins/lua/getc.c Normal file
View file

@ -0,0 +1,10 @@
#include "rocklibc.h"
int PREFIX(getc)(int fd)
{
unsigned char c;
if (rb->read(fd, &c, 1))
return c;
else
return EOF;
}

File diff suppressed because it is too large Load diff

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: lapi.h,v 2.7.1.1 2013/04/12 18:48:47 roberto Exp $
** Auxiliary functions from Lua API ** Auxiliary functions from Lua API
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -8,9 +8,17 @@
#define lapi_h #define lapi_h
#include "lobject.h" #include "llimits.h"
#include "lstate.h"
#define api_incr_top(L) {L->top++; api_check(L, L->top <= L->ci->top, \
"stack overflow");}
#define adjustresults(L,nres) \
{ if ((nres) == LUA_MULTRET && L->ci->top < L->top) L->ci->top = L->top; }
#define api_checknelems(L,n) api_check(L, (n) < (L->top - L->ci->func), \
"not enough elements in the stack")
LUAI_FUNC void luaA_pushobject (lua_State *L, const TValue *o);
#endif #endif

File diff suppressed because it is too large Load diff

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: lauxlib.h,v 1.120.1.1 2013/04/12 18:48:47 roberto Exp $
** Auxiliary functions for building Lua libraries ** Auxiliary functions for building Lua libraries
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -15,18 +15,6 @@
#include "lua.h" #include "lua.h"
#if defined(LUA_COMPAT_GETN)
LUALIB_API int (luaL_getn) (lua_State *L, int t);
LUALIB_API void (luaL_setn) (lua_State *L, int t, int n);
#else
#define luaL_getn(L,i) ((int)lua_objlen(L, i))
#define luaL_setn(L,i,j) ((void)0) /* no op! */
#endif
#if defined(LUA_COMPAT_OPENLIB)
#define luaI_openlib luaL_openlib
#endif
/* extra error code for `luaL_load' */ /* extra error code for `luaL_load' */
#define LUA_ERRFILE (LUA_ERRERR+1) #define LUA_ERRFILE (LUA_ERRERR+1)
@ -38,14 +26,12 @@ typedef struct luaL_Reg {
} luaL_Reg; } luaL_Reg;
LUALIB_API void (luaL_checkversion_) (lua_State *L, lua_Number ver);
#define luaL_checkversion(L) luaL_checkversion_(L, LUA_VERSION_NUM)
LUALIB_API void (luaI_openlib) (lua_State *L, const char *libname,
const luaL_Reg *l, int nup);
LUALIB_API void (luaL_register) (lua_State *L, const char *libname,
const luaL_Reg *l);
LUALIB_API int (luaL_getmetafield) (lua_State *L, int obj, const char *e); LUALIB_API int (luaL_getmetafield) (lua_State *L, int obj, const char *e);
LUALIB_API int (luaL_callmeta) (lua_State *L, int obj, const char *e); LUALIB_API int (luaL_callmeta) (lua_State *L, int obj, const char *e);
LUALIB_API int (luaL_typerror) (lua_State *L, int narg, const char *tname); LUALIB_API const char *(luaL_tolstring) (lua_State *L, int idx, size_t *len);
LUALIB_API int (luaL_argerror) (lua_State *L, int numarg, const char *extramsg); LUALIB_API int (luaL_argerror) (lua_State *L, int numarg, const char *extramsg);
LUALIB_API const char *(luaL_checklstring) (lua_State *L, int numArg, LUALIB_API const char *(luaL_checklstring) (lua_State *L, int numArg,
size_t *l); size_t *l);
@ -57,16 +43,17 @@ LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int nArg, lua_Number def);
LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int numArg); LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int numArg);
LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int nArg, LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int nArg,
lua_Integer def); lua_Integer def);
LUALIB_API lua_Unsigned (luaL_checkunsigned) (lua_State *L, int numArg);
LUALIB_API int (luaL_checkboolean) (lua_State *L, int numArg); LUALIB_API lua_Unsigned (luaL_optunsigned) (lua_State *L, int numArg,
LUALIB_API int (luaL_optboolean) (lua_State *L, int nArg, lua_Unsigned def);
int def);
LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg); LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg);
LUALIB_API void (luaL_checktype) (lua_State *L, int narg, int t); LUALIB_API void (luaL_checktype) (lua_State *L, int narg, int t);
LUALIB_API void (luaL_checkany) (lua_State *L, int narg); LUALIB_API void (luaL_checkany) (lua_State *L, int narg);
LUALIB_API int (luaL_newmetatable) (lua_State *L, const char *tname); LUALIB_API int (luaL_newmetatable) (lua_State *L, const char *tname);
LUALIB_API void (luaL_setmetatable) (lua_State *L, const char *tname);
LUALIB_API void *(luaL_testudata) (lua_State *L, int ud, const char *tname);
LUALIB_API void *(luaL_checkudata) (lua_State *L, int ud, const char *tname); LUALIB_API void *(luaL_checkudata) (lua_State *L, int ud, const char *tname);
LUALIB_API void (luaL_where) (lua_State *L, int lvl); LUALIB_API void (luaL_where) (lua_State *L, int lvl);
@ -75,25 +62,41 @@ LUALIB_API int (luaL_error) (lua_State *L, const char *fmt, ...);
LUALIB_API int (luaL_checkoption) (lua_State *L, int narg, const char *def, LUALIB_API int (luaL_checkoption) (lua_State *L, int narg, const char *def,
const char *const lst[]); const char *const lst[]);
LUALIB_API int (luaL_fileresult) (lua_State *L, int stat, const char *fname);
LUALIB_API int (luaL_execresult) (lua_State *L, int stat);
/* pre-defined references */
#define LUA_NOREF (-2)
#define LUA_REFNIL (-1)
LUALIB_API int (luaL_ref) (lua_State *L, int t); LUALIB_API int (luaL_ref) (lua_State *L, int t);
LUALIB_API void (luaL_unref) (lua_State *L, int t, int ref); LUALIB_API void (luaL_unref) (lua_State *L, int t, int ref);
LUALIB_API int (luaL_loadfile) (lua_State *L, const char *filename); LUALIB_API int (luaL_loadfilex) (lua_State *L, const char *filename,
LUALIB_API int (luaL_loadbuffer) (lua_State *L, const char *buff, size_t sz, const char *mode);
const char *name);
#define luaL_loadfile(L,f) luaL_loadfilex(L,f,NULL)
LUALIB_API int (luaL_loadbufferx) (lua_State *L, const char *buff, size_t sz,
const char *name, const char *mode);
LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s); LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s);
LUALIB_API lua_State *(luaL_newstate) (void); LUALIB_API lua_State *(luaL_newstate) (void);
LUALIB_API int (luaL_len) (lua_State *L, int idx);
LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s, const char *p, LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s, const char *p,
const char *r); const char *r);
LUALIB_API const char *(luaL_findtable) (lua_State *L, int idx, LUALIB_API void (luaL_setfuncs) (lua_State *L, const luaL_Reg *l, int nup);
const char *fname, int szhint);
LUALIB_API int (luaL_getsubtable) (lua_State *L, int idx, const char *fname);
LUALIB_API void (luaL_traceback) (lua_State *L, lua_State *L1,
const char *msg, int level);
LUALIB_API void (luaL_requiref) (lua_State *L, const char *modname,
lua_CFunction openf, int glb);
/* /*
** =============================================================== ** ===============================================================
@ -101,6 +104,12 @@ LUALIB_API const char *(luaL_findtable) (lua_State *L, int idx,
** =============================================================== ** ===============================================================
*/ */
#define luaL_newlibtable(L,l) \
lua_createtable(L, 0, sizeof(l)/sizeof((l)[0]) - 1)
#define luaL_newlib(L,l) (luaL_newlibtable(L,l), luaL_setfuncs(L,l,0))
#define luaL_argcheck(L, cond,numarg,extramsg) \ #define luaL_argcheck(L, cond,numarg,extramsg) \
((void)((cond) || luaL_argerror(L, (numarg), (extramsg)))) ((void)((cond) || luaL_argerror(L, (numarg), (extramsg))))
#define luaL_checkstring(L,n) (luaL_checklstring(L, (n), NULL)) #define luaL_checkstring(L,n) (luaL_checklstring(L, (n), NULL))
@ -122,56 +131,81 @@ LUALIB_API const char *(luaL_findtable) (lua_State *L, int idx,
#define luaL_opt(L,f,n,d) (lua_isnoneornil(L,(n)) ? (d) : f(L,(n))) #define luaL_opt(L,f,n,d) (lua_isnoneornil(L,(n)) ? (d) : f(L,(n)))
#define luaL_loadbuffer(L,s,sz,n) luaL_loadbufferx(L,s,sz,n,NULL)
/* /*
** {====================================================== ** {======================================================
** Generic Buffer manipulation ** Generic Buffer manipulation
** ======================================================= ** =======================================================
*/ */
typedef struct luaL_Buffer { typedef struct luaL_Buffer {
char *p; /* current position in buffer */ char *b; /* buffer address */
int lvl; /* number of strings in the stack (level) */ size_t size; /* buffer size */
size_t n; /* number of characters in buffer */
lua_State *L; lua_State *L;
char buffer[LUAL_BUFFERSIZE]; char initb[LUAL_BUFFERSIZE]; /* initial buffer */
} luaL_Buffer; } luaL_Buffer;
#define luaL_addchar(B,c) \ #define luaL_addchar(B,c) \
((void)((B)->p < ((B)->buffer+LUAL_BUFFERSIZE) || luaL_prepbuffer(B)), \ ((void)((B)->n < (B)->size || luaL_prepbuffsize((B), 1)), \
(*(B)->p++ = (char)(c))) ((B)->b[(B)->n++] = (c)))
/* compatibility only */ #define luaL_addsize(B,s) ((B)->n += (s))
#define luaL_putchar(B,c) luaL_addchar(B,c)
#define luaL_addsize(B,n) ((B)->p += (n))
LUALIB_API void (luaL_buffinit) (lua_State *L, luaL_Buffer *B); LUALIB_API void (luaL_buffinit) (lua_State *L, luaL_Buffer *B);
LUALIB_API char *(luaL_prepbuffer) (luaL_Buffer *B); LUALIB_API char *(luaL_prepbuffsize) (luaL_Buffer *B, size_t sz);
LUALIB_API void (luaL_addlstring) (luaL_Buffer *B, const char *s, size_t l); LUALIB_API void (luaL_addlstring) (luaL_Buffer *B, const char *s, size_t l);
LUALIB_API void (luaL_addstring) (luaL_Buffer *B, const char *s); LUALIB_API void (luaL_addstring) (luaL_Buffer *B, const char *s);
LUALIB_API void (luaL_addvalue) (luaL_Buffer *B); LUALIB_API void (luaL_addvalue) (luaL_Buffer *B);
LUALIB_API void (luaL_pushresult) (luaL_Buffer *B); LUALIB_API void (luaL_pushresult) (luaL_Buffer *B);
LUALIB_API void (luaL_pushresultsize) (luaL_Buffer *B, size_t sz);
LUALIB_API char *(luaL_buffinitsize) (lua_State *L, luaL_Buffer *B, size_t sz);
#define luaL_prepbuffer(B) luaL_prepbuffsize(B, LUAL_BUFFERSIZE)
/* }====================================================== */ /* }====================================================== */
/* compatibility with ref system */
/* pre-defined references */ /*
#define LUA_NOREF (-2) ** {======================================================
#define LUA_REFNIL (-1) ** File handles for IO library
** =======================================================
*/
#define lua_ref(L,lock) ((lock) ? luaL_ref(L, LUA_REGISTRYINDEX) : \ /*
(lua_pushstring(L, "unlocked references are obsolete"), lua_error(L), 0)) ** A file handle is a userdata with metatable 'LUA_FILEHANDLE' and
** initial structure 'luaL_Stream' (it may contain other fields
** after that initial structure).
*/
#define lua_unref(L,ref) luaL_unref(L, LUA_REGISTRYINDEX, (ref)) #define LUA_FILEHANDLE "FILE*"
#define lua_getref(L,ref) lua_rawgeti(L, LUA_REGISTRYINDEX, (ref))
#define luaL_reg luaL_Reg typedef struct luaL_Stream {
FILE *f; /* stream (NULL for incompletely created streams) */
lua_CFunction closef; /* to close stream (NULL for closed streams) */
} luaL_Stream;
/* }====================================================== */
/* compatibility with old module system */
#if defined(LUA_COMPAT_MODULE)
LUALIB_API void (luaL_pushmodule) (lua_State *L, const char *modname,
int sizehint);
LUALIB_API void (luaL_openlib) (lua_State *L, const char *libname,
const luaL_Reg *l, int nup);
#define luaL_register(L,n,l) (luaL_openlib(L,(n),(l),0))
#endif
#endif #endif

View file

@ -1,5 +1,5 @@
/* /*
** $Id: lbaselib.c,v 1.191.1.6 2008/02/14 16:46:22 roberto Exp $ ** $Id: lbaselib.c,v 1.276.1.1 2013/04/12 18:48:47 roberto Exp $
** Basic library ** Basic library
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -20,62 +20,68 @@
#include "lualib.h" #include "lualib.h"
/*
** If your system does not support `stdout', you can just remove this function.
** If you need, you can define your own `print' function, following this
** model but changing `fputs' to put the strings at a proper place
** (a console window or a log file, for instance).
*/
#if 0
static int luaB_print (lua_State *L) { static int luaB_print (lua_State *L) {
int n = lua_gettop(L); /* number of arguments */ int n = lua_gettop(L); /* number of arguments */
int i; int i;
lua_getglobal(L, "tostring"); lua_getglobal(L, "tostring");
for (i=1; i<=n; i++) { for (i=1; i<=n; i++) {
const char *s; const char *s;
size_t l;
lua_pushvalue(L, -1); /* function to be called */ lua_pushvalue(L, -1); /* function to be called */
lua_pushvalue(L, i); /* value to print */ lua_pushvalue(L, i); /* value to print */
lua_call(L, 1, 1); lua_call(L, 1, 1);
s = lua_tostring(L, -1); /* get result */ s = lua_tolstring(L, -1, &l); /* get result */
if (s == NULL) if (s == NULL)
return luaL_error(L, LUA_QL("tostring") " must return a string to " return luaL_error(L,
LUA_QL("print")); LUA_QL("tostring") " must return a string to " LUA_QL("print"));
if (i>1) fputs("\t", stdout); if (i>1) luai_writestring("\t", 1);
fputs(s, stdout); luai_writestring(s, l);
lua_pop(L, 1); /* pop result */ lua_pop(L, 1); /* pop result */
} }
fputs("\n", stdout); luai_writeline();
return 0; return 0;
} }
#endif
#define SPACECHARS " \f\n\r\t\v"
static int luaB_tonumber (lua_State *L) { static int luaB_tonumber (lua_State *L) {
int base = luaL_optint(L, 2, 10); if (lua_isnoneornil(L, 2)) { /* standard conversion */
if (base == 10) { /* standard conversion */ int isnum;
luaL_checkany(L, 1); lua_Number n = lua_tonumberx(L, 1, &isnum);
if (lua_isnumber(L, 1)) { if (isnum) {
lua_pushnumber(L, lua_tonumber(L, 1)); lua_pushnumber(L, n);
return 1; return 1;
} } /* else not a number; must be something */
luaL_checkany(L, 1);
} }
else { else {
const char *s1 = luaL_checkstring(L, 1); size_t l;
char *s2; const char *s = luaL_checklstring(L, 1, &l);
unsigned long n; const char *e = s + l; /* end point for 's' */
int base = luaL_checkint(L, 2);
int neg = 0;
luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range"); luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range");
n = strtoul(s1, &s2, base); s += strspn(s, SPACECHARS); /* skip initial spaces */
if (s1 != s2) { /* at least one valid digit? */ if (*s == '-') { s++; neg = 1; } /* handle signal */
while (isspace((unsigned char)(*s2))) s2++; /* skip trailing spaces */ else if (*s == '+') s++;
if (*s2 == '\0') { /* no invalid trailing characters? */ if (isalnum((unsigned char)*s)) {
lua_pushnumber(L, (lua_Number)n); lua_Number n = 0;
do {
int digit = (isdigit((unsigned char)*s)) ? *s - '0'
: toupper((unsigned char)*s) - 'A' + 10;
if (digit >= base) break; /* invalid numeral; force a fail */
n = n * (lua_Number)base + (lua_Number)digit;
s++;
} while (isalnum((unsigned char)*s));
s += strspn(s, SPACECHARS); /* skip trailing spaces */
if (s == e) { /* no invalid trailing characters? */
lua_pushnumber(L, (neg) ? -n : n);
return 1; return 1;
} } /* else not a number */
} } /* else not a number */
} }
lua_pushnil(L); /* else not a number */ lua_pushnil(L); /* not a number */
return 1; return 1;
} }
@ -109,57 +115,13 @@ static int luaB_setmetatable (lua_State *L) {
luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2, luaL_argcheck(L, t == LUA_TNIL || t == LUA_TTABLE, 2,
"nil or table expected"); "nil or table expected");
if (luaL_getmetafield(L, 1, "__metatable")) if (luaL_getmetafield(L, 1, "__metatable"))
luaL_error(L, "cannot change a protected metatable"); return luaL_error(L, "cannot change a protected metatable");
lua_settop(L, 2); lua_settop(L, 2);
lua_setmetatable(L, 1); lua_setmetatable(L, 1);
return 1; return 1;
} }
static void getfunc (lua_State *L, int opt) {
if (lua_isfunction(L, 1)) lua_pushvalue(L, 1);
else {
lua_Debug ar;
int level = opt ? luaL_optint(L, 1, 1) : luaL_checkint(L, 1);
luaL_argcheck(L, level >= 0, 1, "level must be non-negative");
if (lua_getstack(L, level, &ar) == 0)
luaL_argerror(L, 1, "invalid level");
lua_getinfo(L, "f", &ar);
if (lua_isnil(L, -1))
luaL_error(L, "no function environment for tail call at level %d",
level);
}
}
static int luaB_getfenv (lua_State *L) {
getfunc(L, 1);
if (lua_iscfunction(L, -1)) /* is a C function? */
lua_pushvalue(L, LUA_GLOBALSINDEX); /* return the thread's global env. */
else
lua_getfenv(L, -1);
return 1;
}
static int luaB_setfenv (lua_State *L) {
luaL_checktype(L, 2, LUA_TTABLE);
getfunc(L, 0);
lua_pushvalue(L, 2);
if (lua_isnumber(L, 1) && lua_tonumber(L, 1) == 0) {
/* change environment of current thread */
lua_pushthread(L);
lua_insert(L, -2);
lua_setfenv(L, -2);
return 0;
}
else if (lua_iscfunction(L, -2) || lua_setfenv(L, -2) == 0)
luaL_error(L,
LUA_QL("setfenv") " cannot change environment of given object");
return 1;
}
static int luaB_rawequal (lua_State *L) { static int luaB_rawequal (lua_State *L) {
luaL_checkany(L, 1); luaL_checkany(L, 1);
luaL_checkany(L, 2); luaL_checkany(L, 2);
@ -168,6 +130,15 @@ static int luaB_rawequal (lua_State *L) {
} }
static int luaB_rawlen (lua_State *L) {
int t = lua_type(L, 1);
luaL_argcheck(L, t == LUA_TTABLE || t == LUA_TSTRING, 1,
"table or string expected");
lua_pushinteger(L, lua_rawlen(L, 1));
return 1;
}
static int luaB_rawget (lua_State *L) { static int luaB_rawget (lua_State *L) {
luaL_checktype(L, 1, LUA_TTABLE); luaL_checktype(L, 1, LUA_TTABLE);
luaL_checkany(L, 2); luaL_checkany(L, 2);
@ -186,32 +157,29 @@ static int luaB_rawset (lua_State *L) {
} }
static int luaB_gcinfo (lua_State *L) {
lua_pushinteger(L, lua_getgccount(L));
return 1;
}
static int luaB_collectgarbage (lua_State *L) { static int luaB_collectgarbage (lua_State *L) {
static const char *const opts[] = {"stop", "restart", "collect", static const char *const opts[] = {"stop", "restart", "collect",
"count", "step", "setpause", "setstepmul", NULL}; "count", "step", "setpause", "setstepmul",
"setmajorinc", "isrunning", "generational", "incremental", NULL};
static const int optsnum[] = {LUA_GCSTOP, LUA_GCRESTART, LUA_GCCOLLECT, static const int optsnum[] = {LUA_GCSTOP, LUA_GCRESTART, LUA_GCCOLLECT,
LUA_GCCOUNT, LUA_GCSTEP, LUA_GCSETPAUSE, LUA_GCSETSTEPMUL}; LUA_GCCOUNT, LUA_GCSTEP, LUA_GCSETPAUSE, LUA_GCSETSTEPMUL,
int o = luaL_checkoption(L, 1, "collect", opts); LUA_GCSETMAJORINC, LUA_GCISRUNNING, LUA_GCGEN, LUA_GCINC};
int o = optsnum[luaL_checkoption(L, 1, "collect", opts)];
int ex = luaL_optint(L, 2, 0); int ex = luaL_optint(L, 2, 0);
int res = lua_gc(L, optsnum[o], ex); int res = lua_gc(L, o, ex);
switch (optsnum[o]) { switch (o) {
case LUA_GCCOUNT: { case LUA_GCCOUNT: {
int b = lua_gc(L, LUA_GCCOUNTB, 0); int b = lua_gc(L, LUA_GCCOUNTB, 0);
lua_pushnumber(L, res + ((lua_Number)b/1024)); lua_pushnumber(L, res + ((lua_Number)b/1024));
return 1; lua_pushinteger(L, b);
return 2;
} }
case LUA_GCSTEP: { case LUA_GCSTEP: case LUA_GCISRUNNING: {
lua_pushboolean(L, res); lua_pushboolean(L, res);
return 1; return 1;
} }
default: { default: {
lua_pushnumber(L, res); lua_pushinteger(L, res);
return 1; return 1;
} }
} }
@ -225,6 +193,23 @@ static int luaB_type (lua_State *L) {
} }
static int pairsmeta (lua_State *L, const char *method, int iszero,
lua_CFunction iter) {
if (!luaL_getmetafield(L, 1, method)) { /* no metamethod? */
luaL_checktype(L, 1, LUA_TTABLE); /* argument must be a table */
lua_pushcfunction(L, iter); /* will return generator, */
lua_pushvalue(L, 1); /* state, */
if (iszero) lua_pushinteger(L, 0); /* and initial value */
else lua_pushnil(L);
}
else {
lua_pushvalue(L, 1); /* argument 'self' to metamethod */
lua_call(L, 1, 3); /* get 3 values from metamethod */
}
return 3;
}
static int luaB_next (lua_State *L) { static int luaB_next (lua_State *L) {
luaL_checktype(L, 1, LUA_TTABLE); luaL_checktype(L, 1, LUA_TTABLE);
lua_settop(L, 2); /* create a 2nd argument if there isn't one */ lua_settop(L, 2); /* create a 2nd argument if there isn't one */
@ -238,11 +223,7 @@ static int luaB_next (lua_State *L) {
static int luaB_pairs (lua_State *L) { static int luaB_pairs (lua_State *L) {
luaL_checktype(L, 1, LUA_TTABLE); return pairsmeta(L, "__pairs", 0, luaB_next);
lua_pushvalue(L, lua_upvalueindex(1)); /* return generator, */
lua_pushvalue(L, 1); /* state, */
lua_pushnil(L); /* and initial value */
return 3;
} }
@ -252,23 +233,25 @@ static int ipairsaux (lua_State *L) {
i++; /* next value */ i++; /* next value */
lua_pushinteger(L, i); lua_pushinteger(L, i);
lua_rawgeti(L, 1, i); lua_rawgeti(L, 1, i);
return (lua_isnil(L, -1)) ? 0 : 2; return (lua_isnil(L, -1)) ? 1 : 2;
} }
static int luaB_ipairs (lua_State *L) { static int luaB_ipairs (lua_State *L) {
luaL_checktype(L, 1, LUA_TTABLE); return pairsmeta(L, "__ipairs", 1, ipairsaux);
lua_pushvalue(L, lua_upvalueindex(1)); /* return generator, */
lua_pushvalue(L, 1); /* state, */
lua_pushinteger(L, 0); /* and initial value */
return 3;
} }
static int load_aux (lua_State *L, int status) { static int load_aux (lua_State *L, int status, int envidx) {
if (status == 0) /* OK? */ if (status == LUA_OK) {
if (envidx != 0) { /* 'env' parameter? */
lua_pushvalue(L, envidx); /* environment for loaded function */
if (!lua_setupvalue(L, -2, 1)) /* set it as 1st upvalue */
lua_pop(L, 1); /* remove 'env' if not used by previous call */
}
return 1; return 1;
else { }
else { /* error (message is on top of the stack) */
lua_pushnil(L); lua_pushnil(L);
lua_insert(L, -2); /* put before error message */ lua_insert(L, -2); /* put before error message */
return 2; /* return nil plus error message */ return 2; /* return nil plus error message */
@ -276,20 +259,30 @@ static int load_aux (lua_State *L, int status) {
} }
static int luaB_loadstring (lua_State *L) {
size_t l;
const char *s = luaL_checklstring(L, 1, &l);
const char *chunkname = luaL_optstring(L, 2, s);
return load_aux(L, luaL_loadbuffer(L, s, l, chunkname));
}
static int luaB_loadfile (lua_State *L) { static int luaB_loadfile (lua_State *L) {
const char *fname = luaL_optstring(L, 1, NULL); const char *fname = luaL_optstring(L, 1, NULL);
return load_aux(L, luaL_loadfile(L, fname)); const char *mode = luaL_optstring(L, 2, NULL);
int env = (!lua_isnone(L, 3) ? 3 : 0); /* 'env' index or 0 if no 'env' */
int status = luaL_loadfilex(L, fname, mode);
return load_aux(L, status, env);
} }
/*
** {======================================================
** Generic Read function
** =======================================================
*/
/*
** reserved slot, above all arguments, to hold a copy of the returned
** string to avoid it being collected while parsed. 'load' has four
** optional arguments (chunk, source name, mode, and environment).
*/
#define RESERVEDSLOT 5
/* /*
** Reader for generic `load' function: `lua_load' uses the ** Reader for generic `load' function: `lua_load' uses the
** stack for internal stuff, so the reader cannot change the ** stack for internal stuff, so the reader cannot change the
@ -297,66 +290,66 @@ static int luaB_loadfile (lua_State *L) {
** reserved slot inside the stack. ** reserved slot inside the stack.
*/ */
static const char *generic_reader (lua_State *L, void *ud, size_t *size) { static const char *generic_reader (lua_State *L, void *ud, size_t *size) {
(void)ud; /* to avoid warnings */ (void)(ud); /* not used */
luaL_checkstack(L, 2, "too many nested functions"); luaL_checkstack(L, 2, "too many nested functions");
lua_pushvalue(L, 1); /* get function */ lua_pushvalue(L, 1); /* get function */
lua_call(L, 0, 1); /* call it */ lua_call(L, 0, 1); /* call it */
if (lua_isnil(L, -1)) { if (lua_isnil(L, -1)) {
lua_pop(L, 1); /* pop result */
*size = 0; *size = 0;
return NULL; return NULL;
} }
else if (lua_isstring(L, -1)) { else if (!lua_isstring(L, -1))
lua_replace(L, 3); /* save string in a reserved stack slot */ luaL_error(L, "reader function must return a string");
return lua_tolstring(L, 3, size); lua_replace(L, RESERVEDSLOT); /* save string in reserved slot */
} return lua_tolstring(L, RESERVEDSLOT, size);
else luaL_error(L, "reader function must return a string");
return NULL; /* to avoid warnings */
} }
static int luaB_load (lua_State *L) { static int luaB_load (lua_State *L) {
int status; int status;
const char *cname = luaL_optstring(L, 2, "=(load)"); size_t l;
luaL_checktype(L, 1, LUA_TFUNCTION); const char *s = lua_tolstring(L, 1, &l);
lua_settop(L, 3); /* function, eventual name, plus one reserved slot */ const char *mode = luaL_optstring(L, 3, "bt");
status = lua_load(L, generic_reader, NULL, cname); int env = (!lua_isnone(L, 4) ? 4 : 0); /* 'env' index or 0 if no 'env' */
return load_aux(L, status); if (s != NULL) { /* loading a string? */
const char *chunkname = luaL_optstring(L, 2, s);
status = luaL_loadbufferx(L, s, l, chunkname, mode);
}
else { /* loading from a reader function */
const char *chunkname = luaL_optstring(L, 2, "=(load)");
luaL_checktype(L, 1, LUA_TFUNCTION);
lua_settop(L, RESERVEDSLOT); /* create reserved slot */
status = lua_load(L, generic_reader, NULL, chunkname, mode);
}
return load_aux(L, status, env);
}
/* }====================================================== */
static int dofilecont (lua_State *L) {
return lua_gettop(L) - 1;
} }
static int luaB_dofile (lua_State *L) { static int luaB_dofile (lua_State *L) {
const char *fname = luaL_optstring(L, 1, NULL); const char *fname = luaL_optstring(L, 1, NULL);
int n = lua_gettop(L); lua_settop(L, 1);
if (luaL_loadfile(L, fname) != 0) lua_error(L); if (luaL_loadfile(L, fname) != LUA_OK)
lua_call(L, 0, LUA_MULTRET); return lua_error(L);
return lua_gettop(L) - n; lua_callk(L, 0, LUA_MULTRET, 0, dofilecont);
return dofilecont(L);
} }
static int luaB_assert (lua_State *L) { static int luaB_assert (lua_State *L) {
luaL_checkany(L, 1);
if (!lua_toboolean(L, 1)) if (!lua_toboolean(L, 1))
return luaL_error(L, "%s", luaL_optstring(L, 2, "assertion failed!")); return luaL_error(L, "%s", luaL_optstring(L, 2, "assertion failed!"));
return lua_gettop(L); return lua_gettop(L);
} }
static int luaB_unpack (lua_State *L) {
int i, e, n;
luaL_checktype(L, 1, LUA_TTABLE);
i = luaL_optint(L, 2, 1);
e = luaL_opt(L, luaL_checkint, 3, luaL_getn(L, 1));
if (i > e) return 0; /* empty range */
n = e - i + 1; /* number of elements */
if (n <= 0 || !lua_checkstack(L, n)) /* n <= 0 means arith. overflow */
return luaL_error(L, "too many results to unpack");
lua_rawgeti(L, 1, i); /* push arg[i] (avoiding overflow problems) */
while (i++ < e) /* push arg[i + 1...e] */
lua_rawgeti(L, 1, i);
return n;
}
static int luaB_select (lua_State *L) { static int luaB_select (lua_State *L) {
int n = lua_gettop(L); int n = lua_gettop(L);
if (lua_type(L, 1) == LUA_TSTRING && *lua_tostring(L, 1) == '#') { if (lua_type(L, 1) == LUA_TSTRING && *lua_tostring(L, 1) == '#') {
@ -373,75 +366,50 @@ static int luaB_select (lua_State *L) {
} }
static int finishpcall (lua_State *L, int status) {
if (!lua_checkstack(L, 1)) { /* no space for extra boolean? */
lua_settop(L, 0); /* create space for return values */
lua_pushboolean(L, 0);
lua_pushstring(L, "stack overflow");
return 2; /* return false, msg */
}
lua_pushboolean(L, status); /* first result (status) */
lua_replace(L, 1); /* put first result in first slot */
return lua_gettop(L);
}
static int pcallcont (lua_State *L) {
int status = lua_getctx(L, NULL);
return finishpcall(L, (status == LUA_YIELD));
}
static int luaB_pcall (lua_State *L) { static int luaB_pcall (lua_State *L) {
int status; int status;
luaL_checkany(L, 1); luaL_checkany(L, 1);
status = lua_pcall(L, lua_gettop(L) - 1, LUA_MULTRET, 0); lua_pushnil(L);
lua_pushboolean(L, (status == 0)); lua_insert(L, 1); /* create space for status result */
lua_insert(L, 1); status = lua_pcallk(L, lua_gettop(L) - 2, LUA_MULTRET, 0, 0, pcallcont);
return lua_gettop(L); /* return status + all results */ return finishpcall(L, (status == LUA_OK));
} }
static int luaB_xpcall (lua_State *L) { static int luaB_xpcall (lua_State *L) {
int status; int status;
luaL_checkany(L, 2); int n = lua_gettop(L);
lua_settop(L, 2); luaL_argcheck(L, n >= 2, 2, "value expected");
lua_insert(L, 1); /* put error function under function to be called */ lua_pushvalue(L, 1); /* exchange function... */
status = lua_pcall(L, 0, LUA_MULTRET, 1); lua_copy(L, 2, 1); /* ...and error handler */
lua_pushboolean(L, (status == 0)); lua_replace(L, 2);
lua_replace(L, 1); status = lua_pcallk(L, n - 2, LUA_MULTRET, 1, 0, pcallcont);
return lua_gettop(L); /* return status + all results */ return finishpcall(L, (status == LUA_OK));
} }
static int luaB_tostring (lua_State *L) { static int luaB_tostring (lua_State *L) {
luaL_checkany(L, 1); luaL_checkany(L, 1);
if (luaL_callmeta(L, 1, "__tostring")) /* is there a metafield? */ luaL_tolstring(L, 1, NULL);
return 1; /* use its value */
switch (lua_type(L, 1)) {
case LUA_TNUMBER:
lua_pushstring(L, lua_tostring(L, 1));
break;
case LUA_TSTRING:
lua_pushvalue(L, 1);
break;
case LUA_TBOOLEAN:
lua_pushstring(L, (lua_toboolean(L, 1) ? "true" : "false"));
break;
case LUA_TNIL:
lua_pushliteral(L, "nil");
break;
default:
lua_pushfstring(L, "%s: %p", luaL_typename(L, 1), lua_topointer(L, 1));
break;
}
return 1;
}
static int luaB_newproxy (lua_State *L) {
lua_settop(L, 1);
lua_newuserdata(L, 0); /* create proxy */
if (lua_toboolean(L, 1) == 0)
return 1; /* no metatable */
else if (lua_isboolean(L, 1)) {
lua_newtable(L); /* create a new metatable `m' ... */
lua_pushvalue(L, -1); /* ... and mark `m' as a valid metatable */
lua_pushboolean(L, 1);
lua_rawset(L, lua_upvalueindex(1)); /* weaktable[m] = true */
}
else {
int validproxy = 0; /* to check if weaktable[metatable(u)] == true */
if (lua_getmetatable(L, 1)) {
lua_rawget(L, lua_upvalueindex(1));
validproxy = lua_toboolean(L, -1);
lua_pop(L, 1); /* remove value */
}
luaL_argcheck(L, validproxy, 1, "boolean or proxy expected");
lua_getmetatable(L, 1); /* metatable is valid; get it */
}
lua_setmetatable(L, 2);
return 1; return 1;
} }
@ -451,207 +419,40 @@ static const luaL_Reg base_funcs[] = {
{"collectgarbage", luaB_collectgarbage}, {"collectgarbage", luaB_collectgarbage},
{"dofile", luaB_dofile}, {"dofile", luaB_dofile},
{"error", luaB_error}, {"error", luaB_error},
{"gcinfo", luaB_gcinfo},
{"getfenv", luaB_getfenv},
{"getmetatable", luaB_getmetatable}, {"getmetatable", luaB_getmetatable},
{"ipairs", luaB_ipairs},
{"loadfile", luaB_loadfile}, {"loadfile", luaB_loadfile},
{"load", luaB_load}, {"load", luaB_load},
{"loadstring", luaB_loadstring}, #if defined(LUA_COMPAT_LOADSTRING)
{"next", luaB_next}, {"loadstring", luaB_load},
{"pcall", luaB_pcall},
#if 0
{"print", luaB_print},
#endif #endif
{"next", luaB_next},
{"pairs", luaB_pairs},
{"pcall", luaB_pcall},
{"print", luaB_print},
{"rawequal", luaB_rawequal}, {"rawequal", luaB_rawequal},
{"rawlen", luaB_rawlen},
{"rawget", luaB_rawget}, {"rawget", luaB_rawget},
{"rawset", luaB_rawset}, {"rawset", luaB_rawset},
{"select", luaB_select}, {"select", luaB_select},
{"setfenv", luaB_setfenv},
{"setmetatable", luaB_setmetatable}, {"setmetatable", luaB_setmetatable},
{"tonumber", luaB_tonumber}, {"tonumber", luaB_tonumber},
{"tostring", luaB_tostring}, {"tostring", luaB_tostring},
{"type", luaB_type}, {"type", luaB_type},
{"unpack", luaB_unpack},
{"xpcall", luaB_xpcall}, {"xpcall", luaB_xpcall},
{NULL, NULL} {NULL, NULL}
}; };
/* LUAMOD_API int luaopen_base (lua_State *L) {
** {======================================================
** Coroutine library
** =======================================================
*/
#define CO_RUN 0 /* running */
#define CO_SUS 1 /* suspended */
#define CO_NOR 2 /* 'normal' (it resumed another coroutine) */
#define CO_DEAD 3
static const char *const statnames[] =
{"running", "suspended", "normal", "dead"};
static int costatus (lua_State *L, lua_State *co) {
if (L == co) return CO_RUN;
switch (lua_status(co)) {
case LUA_YIELD:
return CO_SUS;
case 0: {
lua_Debug ar;
if (lua_getstack(co, 0, &ar) > 0) /* does it have frames? */
return CO_NOR; /* it is running */
else if (lua_gettop(co) == 0)
return CO_DEAD;
else
return CO_SUS; /* initial state */
}
default: /* some error occured */
return CO_DEAD;
}
}
static int luaB_costatus (lua_State *L) {
lua_State *co = lua_tothread(L, 1);
luaL_argcheck(L, co, 1, "coroutine expected");
lua_pushstring(L, statnames[costatus(L, co)]);
return 1;
}
static int auxresume (lua_State *L, lua_State *co, int narg) {
int status = costatus(L, co);
if (!lua_checkstack(co, narg))
luaL_error(L, "too many arguments to resume");
if (status != CO_SUS) {
lua_pushfstring(L, "cannot resume %s coroutine", statnames[status]);
return -1; /* error flag */
}
lua_xmove(L, co, narg);
lua_setlevel(L, co);
status = lua_resume(co, narg);
if (status == 0 || status == LUA_YIELD) {
int nres = lua_gettop(co);
if (!lua_checkstack(L, nres + 1))
luaL_error(L, "too many results to resume");
lua_xmove(co, L, nres); /* move yielded values */
return nres;
}
else {
lua_xmove(co, L, 1); /* move error message */
return -1; /* error flag */
}
}
static int luaB_coresume (lua_State *L) {
lua_State *co = lua_tothread(L, 1);
int r;
luaL_argcheck(L, co, 1, "coroutine expected");
r = auxresume(L, co, lua_gettop(L) - 1);
if (r < 0) {
lua_pushboolean(L, 0);
lua_insert(L, -2);
return 2; /* return false + error message */
}
else {
lua_pushboolean(L, 1);
lua_insert(L, -(r + 1));
return r + 1; /* return true + `resume' returns */
}
}
static int luaB_auxwrap (lua_State *L) {
lua_State *co = lua_tothread(L, lua_upvalueindex(1));
int r = auxresume(L, co, lua_gettop(L));
if (r < 0) {
if (lua_isstring(L, -1)) { /* error object is a string? */
luaL_where(L, 1); /* add extra info */
lua_insert(L, -2);
lua_concat(L, 2);
}
lua_error(L); /* propagate error */
}
return r;
}
static int luaB_cocreate (lua_State *L) {
lua_State *NL = lua_newthread(L);
luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1), 1,
"Lua function expected");
lua_pushvalue(L, 1); /* move function to top */
lua_xmove(L, NL, 1); /* move function from L to NL */
return 1;
}
static int luaB_cowrap (lua_State *L) {
luaB_cocreate(L);
lua_pushcclosure(L, luaB_auxwrap, 1);
return 1;
}
static int luaB_yield (lua_State *L) {
return lua_yield(L, lua_gettop(L));
}
static int luaB_corunning (lua_State *L) {
if (lua_pushthread(L))
lua_pushnil(L); /* main thread is not a coroutine */
return 1;
}
static const luaL_Reg co_funcs[] = {
{"create", luaB_cocreate},
{"resume", luaB_coresume},
{"running", luaB_corunning},
{"status", luaB_costatus},
{"wrap", luaB_cowrap},
{"yield", luaB_yield},
{NULL, NULL}
};
/* }====================================================== */
static void auxopen (lua_State *L, const char *name,
lua_CFunction f, lua_CFunction u) {
lua_pushcfunction(L, u);
lua_pushcclosure(L, f, 1);
lua_setfield(L, -2, name);
}
static void base_open (lua_State *L) {
/* set global _G */ /* set global _G */
lua_pushvalue(L, LUA_GLOBALSINDEX); lua_pushglobaltable(L);
lua_setglobal(L, "_G"); lua_pushglobaltable(L);
lua_setfield(L, -2, "_G");
/* open lib into global table */ /* open lib into global table */
luaL_register(L, "_G", base_funcs); luaL_setfuncs(L, base_funcs, 0);
lua_pushliteral(L, LUA_VERSION); lua_pushliteral(L, LUA_VERSION);
lua_setglobal(L, "_VERSION"); /* set global _VERSION */ lua_setfield(L, -2, "_VERSION"); /* set global _VERSION */
/* `ipairs' and `pairs' need auxliliary functions as upvalues */ return 1;
auxopen(L, "ipairs", luaB_ipairs, ipairsaux);
auxopen(L, "pairs", luaB_pairs, luaB_next);
/* `newproxy' needs a weaktable as upvalue */
lua_createtable(L, 0, 1); /* new table `w' */
lua_pushvalue(L, -1); /* `w' will be its own metatable */
lua_setmetatable(L, -2);
lua_pushliteral(L, "kv");
lua_setfield(L, -2, "__mode"); /* metatable(w).__mode = "kv" */
lua_pushcclosure(L, luaB_newproxy, 1);
lua_setglobal(L, "newproxy"); /* set global `newproxy' */
}
LUALIB_API int luaopen_base (lua_State *L) {
base_open(L);
luaL_register(L, LUA_COLIBNAME, co_funcs);
return 2;
} }

View file

@ -1,126 +1,212 @@
/* Bitwise operations library */ /*
/* (c) Reuben Thomas 2000-2008 */ ** $Id: lbitlib.c,v 1.18.1.2 2013/07/09 18:01:41 roberto Exp $
/* bitlib is copyright Reuben Thomas 2000-2008, and is released under the MIT ** Standard library for bitwise operations
license, like Lua (see http://www.lua.org/copyright.html; it's ** See Copyright Notice in lua.h
basically the same as the BSD license). There is no warranty. */ */
#include "config.h" #define lbitlib_c
#define LUA_LIB
#include "lua.h" #include "lua.h"
#include "lauxlib.h" #include "lauxlib.h"
#include "lualib.h" #include "lualib.h"
#include <limits.h>
/* FIXME: Assume lua_Integer is ptrdiff_t */ /* number of bits to consider in a number */
#define LUA_INTEGER_MAX INTPTR_MAX #if !defined(LUA_NBITS)
#define LUA_INTEGER_MIN INTPTR_MIN #define LUA_NBITS 32
/* FIXME: Assume size_t is an unsigned lua_Integer */
typedef size_t lua_UInteger;
#define LUA_UINTEGER_MAX UINT_MAX
/* Bit type size and limits */
#define BIT_BITS (CHAR_BIT * sizeof(lua_Integer))
/* This code may give warnings if BITLIB_FLOAT_* are too big to fit in
long, but that doesn't matter since in that case they won't be
used. */
#define BIT_MAX (LUA_INTEGER_MAX)
#define BIT_MIN (LUA_INTEGER_MIN)
#define BIT_UMAX (LUA_UINTEGER_MAX)
/* Define TOBIT to get a bit value */
#ifdef BUILTIN_CAST
#define
#define TOBIT(L, n, res) \
((void)(res), luaL_checkinteger((L), (n)))
#else
#define TOBIT(L, n, res) \
((lua_Integer)(((res) = luaL_checknumber(L, (n)) % BIT_UMAX), \
(res) > BIT_MAX ? ((res) -= BIT_UMAX, (res) -= 1) : \
((res) < BIT_MIN ? ((res) += BIT_UMAX, (res) += 1) : (res))))
#endif #endif
#define BIT_TRUNCATE(i) \ #define ALLONES (~(((~(lua_Unsigned)0) << (LUA_NBITS - 1)) << 1))
((i) & BIT_UMAX)
/* macro to trim extra bits */
#define trim(x) ((x) & ALLONES)
/* Operations /* builds a number with 'n' ones (1 <= n <= LUA_NBITS) */
#define mask(n) (~((ALLONES << 1) << ((n) - 1)))
The macros MONADIC and VARIADIC only deal with bitwise operations.
LOGICAL_SHIFT truncates its left-hand operand before shifting so typedef lua_Unsigned b_uint;
that any extra bits at the most-significant end are not shifted
into the result.
ARITHMETIC_SHIFT does not truncate its left-hand operand, so that
the sign bits are not removed and right shift work properly.
*/ static b_uint andaux (lua_State *L) {
int i, n = lua_gettop(L);
#define MONADIC(name, op) \ b_uint r = ~(b_uint)0;
static int bit_ ## name(lua_State *L) { \ for (i = 1; i <= n; i++)
lua_Number f; \ r &= luaL_checkunsigned(L, i);
lua_pushinteger(L, BIT_TRUNCATE(op TOBIT(L, 1, f))); \ return trim(r);
return 1; \ }
static int b_and (lua_State *L) {
b_uint r = andaux(L);
lua_pushunsigned(L, r);
return 1;
}
static int b_test (lua_State *L) {
b_uint r = andaux(L);
lua_pushboolean(L, r != 0);
return 1;
}
static int b_or (lua_State *L) {
int i, n = lua_gettop(L);
b_uint r = 0;
for (i = 1; i <= n; i++)
r |= luaL_checkunsigned(L, i);
lua_pushunsigned(L, trim(r));
return 1;
}
static int b_xor (lua_State *L) {
int i, n = lua_gettop(L);
b_uint r = 0;
for (i = 1; i <= n; i++)
r ^= luaL_checkunsigned(L, i);
lua_pushunsigned(L, trim(r));
return 1;
}
static int b_not (lua_State *L) {
b_uint r = ~luaL_checkunsigned(L, 1);
lua_pushunsigned(L, trim(r));
return 1;
}
static int b_shift (lua_State *L, b_uint r, int i) {
if (i < 0) { /* shift right? */
i = -i;
r = trim(r);
if (i >= LUA_NBITS) r = 0;
else r >>= i;
} }
else { /* shift left */
#define VARIADIC(name, op) \ if (i >= LUA_NBITS) r = 0;
static int bit_ ## name(lua_State *L) { \ else r <<= i;
lua_Number f; \ r = trim(r);
int n = lua_gettop(L), i; \
lua_Integer w = TOBIT(L, 1, f); \
for (i = 2; i <= n; i++) \
w op TOBIT(L, i, f); \
lua_pushinteger(L, BIT_TRUNCATE(w)); \
return 1; \
} }
lua_pushunsigned(L, r);
return 1;
}
#define LOGICAL_SHIFT(name, op) \
static int bit_ ## name(lua_State *L) { \ static int b_lshift (lua_State *L) {
lua_Number f; \ return b_shift(L, luaL_checkunsigned(L, 1), luaL_checkint(L, 2));
lua_pushinteger(L, BIT_TRUNCATE(BIT_TRUNCATE((lua_UInteger)TOBIT(L, 1, f)) op \ }
(unsigned)luaL_checknumber(L, 2))); \
return 1; \
static int b_rshift (lua_State *L) {
return b_shift(L, luaL_checkunsigned(L, 1), -luaL_checkint(L, 2));
}
static int b_arshift (lua_State *L) {
b_uint r = luaL_checkunsigned(L, 1);
int i = luaL_checkint(L, 2);
if (i < 0 || !(r & ((b_uint)1 << (LUA_NBITS - 1))))
return b_shift(L, r, -i);
else { /* arithmetic shift for 'negative' number */
if (i >= LUA_NBITS) r = ALLONES;
else
r = trim((r >> i) | ~(~(b_uint)0 >> i)); /* add signal bit */
lua_pushunsigned(L, r);
return 1;
} }
}
#define ARITHMETIC_SHIFT(name, op) \
static int bit_ ## name(lua_State *L) { \
lua_Number f; \
lua_pushinteger(L, BIT_TRUNCATE((lua_Integer)TOBIT(L, 1, f) op \
(unsigned)luaL_checknumber(L, 2))); \
return 1; \
}
MONADIC(bnot, ~) static int b_rot (lua_State *L, int i) {
VARIADIC(band, &=) b_uint r = luaL_checkunsigned(L, 1);
VARIADIC(bor, |=) i &= (LUA_NBITS - 1); /* i = i % NBITS */
VARIADIC(bxor, ^=) r = trim(r);
ARITHMETIC_SHIFT(lshift, <<) if (i != 0) /* avoid undefined shift of LUA_NBITS when i == 0 */
LOGICAL_SHIFT(rshift, >>) r = (r << i) | (r >> (LUA_NBITS - i));
ARITHMETIC_SHIFT(arshift, >>) lua_pushunsigned(L, trim(r));
return 1;
}
static const struct luaL_reg bitlib[] = {
{"bnot", bit_bnot}, static int b_lrot (lua_State *L) {
{"band", bit_band}, return b_rot(L, luaL_checkint(L, 2));
{"bor", bit_bor}, }
{"bxor", bit_bxor},
{"lshift", bit_lshift},
{"rshift", bit_rshift}, static int b_rrot (lua_State *L) {
{"arshift", bit_arshift}, return b_rot(L, -luaL_checkint(L, 2));
}
/*
** get field and width arguments for field-manipulation functions,
** checking whether they are valid.
** ('luaL_error' called without 'return' to avoid later warnings about
** 'width' being used uninitialized.)
*/
static int fieldargs (lua_State *L, int farg, int *width) {
int f = luaL_checkint(L, farg);
int w = luaL_optint(L, farg + 1, 1);
luaL_argcheck(L, 0 <= f, farg, "field cannot be negative");
luaL_argcheck(L, 0 < w, farg + 1, "width must be positive");
if (f + w > LUA_NBITS)
luaL_error(L, "trying to access non-existent bits");
*width = w;
return f;
}
static int b_extract (lua_State *L) {
int w;
b_uint r = luaL_checkunsigned(L, 1);
int f = fieldargs(L, 2, &w);
r = (r >> f) & mask(w);
lua_pushunsigned(L, r);
return 1;
}
static int b_replace (lua_State *L) {
int w;
b_uint r = luaL_checkunsigned(L, 1);
b_uint v = luaL_checkunsigned(L, 2);
int f = fieldargs(L, 3, &w);
int m = mask(w);
v &= m; /* erase bits outside given width */
r = (r & ~(m << f)) | (v << f);
lua_pushunsigned(L, r);
return 1;
}
static const luaL_Reg bitlib[] = {
{"arshift", b_arshift},
{"band", b_and},
{"bnot", b_not},
{"bor", b_or},
{"bxor", b_xor},
{"btest", b_test},
{"extract", b_extract},
{"lrotate", b_lrot},
{"lshift", b_lshift},
{"replace", b_replace},
{"rrotate", b_rrot},
{"rshift", b_rshift},
{NULL, NULL} {NULL, NULL}
}; };
LUALIB_API int luaopen_bit (lua_State *L) {
luaL_register(L, "bit", bitlib);
lua_pushnumber(L, BIT_BITS); LUAMOD_API int luaopen_bit32 (lua_State *L) {
lua_setfield(L, -2, "bits"); luaL_newlib(L, bitlib);
return 1; return 1;
} }

View file

@ -1,5 +1,5 @@
/* /*
** $Id: lcode.c,v 2.25.1.3 2007/12/28 15:32:23 roberto Exp $ ** $Id: lcode.c,v 2.62.1.1 2013/04/12 18:48:47 roberto Exp $
** Code generator for Lua ** Code generator for Lua
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -21,7 +21,9 @@
#include "lobject.h" #include "lobject.h"
#include "lopcodes.h" #include "lopcodes.h"
#include "lparser.h" #include "lparser.h"
#include "lstring.h"
#include "ltable.h" #include "ltable.h"
#include "lvm.h"
#define hasjumps(e) ((e)->t != (e)->f) #define hasjumps(e) ((e)->t != (e)->f)
@ -34,25 +36,23 @@ static int isnumeral(expdesc *e) {
void luaK_nil (FuncState *fs, int from, int n) { void luaK_nil (FuncState *fs, int from, int n) {
Instruction *previous; Instruction *previous;
int l = from + n - 1; /* last register to set nil */
if (fs->pc > fs->lasttarget) { /* no jumps to current position? */ if (fs->pc > fs->lasttarget) { /* no jumps to current position? */
if (fs->pc == 0) { /* function start? */ previous = &fs->f->code[fs->pc-1];
if (from >= fs->nactvar) if (GET_OPCODE(*previous) == OP_LOADNIL) {
return; /* positions are already clean */ int pfrom = GETARG_A(*previous);
} int pl = pfrom + GETARG_B(*previous);
else { if ((pfrom <= from && from <= pl + 1) ||
previous = &fs->f->code[fs->pc-1]; (from <= pfrom && pfrom <= l + 1)) { /* can connect both? */
if (GET_OPCODE(*previous) == OP_LOADNIL) { if (pfrom < from) from = pfrom; /* from = min(from, pfrom) */
int pfrom = GETARG_A(*previous); if (pl > l) l = pl; /* l = max(l, pl) */
int pto = GETARG_B(*previous); SETARG_A(*previous, from);
if (pfrom <= from && from <= pto+1) { /* can connect both? */ SETARG_B(*previous, l - from);
if (from+n-1 > pto) return;
SETARG_B(*previous, from+n-1);
return;
}
} }
} } /* else go through */
} }
luaK_codeABC(fs, OP_LOADNIL, from, from+n-1, 0); /* else no optimization */ luaK_codeABC(fs, OP_LOADNIL, from, n - 1, 0); /* else no optimization */
} }
@ -176,6 +176,19 @@ void luaK_patchlist (FuncState *fs, int list, int target) {
} }
LUAI_FUNC void luaK_patchclose (FuncState *fs, int list, int level) {
level++; /* argument is +1 to reserve 0 as non-op */
while (list != NO_JUMP) {
int next = getjump(fs, list);
lua_assert(GET_OPCODE(fs->f->code[list]) == OP_JMP &&
(GETARG_A(fs->f->code[list]) == 0 ||
GETARG_A(fs->f->code[list]) >= level));
SETARG_A(fs->f->code[list], level);
list = next;
}
}
void luaK_patchtohere (FuncState *fs, int list) { void luaK_patchtohere (FuncState *fs, int list) {
luaK_getlabel(fs); luaK_getlabel(fs);
luaK_concat(fs, &fs->jpc, list); luaK_concat(fs, &fs->jpc, list);
@ -196,6 +209,55 @@ void luaK_concat (FuncState *fs, int *l1, int l2) {
} }
static int luaK_code (FuncState *fs, Instruction i) {
Proto *f = fs->f;
dischargejpc(fs); /* `pc' will change */
/* put new instruction in code array */
luaM_growvector(fs->ls->L, f->code, fs->pc, f->sizecode, Instruction,
MAX_INT, "opcodes");
f->code[fs->pc] = i;
/* save corresponding line information */
luaM_growvector(fs->ls->L, f->lineinfo, fs->pc, f->sizelineinfo, int,
MAX_INT, "opcodes");
f->lineinfo[fs->pc] = fs->ls->lastline;
return fs->pc++;
}
int luaK_codeABC (FuncState *fs, OpCode o, int a, int b, int c) {
lua_assert(getOpMode(o) == iABC);
lua_assert(getBMode(o) != OpArgN || b == 0);
lua_assert(getCMode(o) != OpArgN || c == 0);
lua_assert(a <= MAXARG_A && b <= MAXARG_B && c <= MAXARG_C);
return luaK_code(fs, CREATE_ABC(o, a, b, c));
}
int luaK_codeABx (FuncState *fs, OpCode o, int a, unsigned int bc) {
lua_assert(getOpMode(o) == iABx || getOpMode(o) == iAsBx);
lua_assert(getCMode(o) == OpArgN);
lua_assert(a <= MAXARG_A && bc <= MAXARG_Bx);
return luaK_code(fs, CREATE_ABx(o, a, bc));
}
static int codeextraarg (FuncState *fs, int a) {
lua_assert(a <= MAXARG_Ax);
return luaK_code(fs, CREATE_Ax(OP_EXTRAARG, a));
}
int luaK_codek (FuncState *fs, int reg, int k) {
if (k <= MAXARG_Bx)
return luaK_codeABx(fs, OP_LOADK, reg, k);
else {
int p = luaK_codeABx(fs, OP_LOADKX, reg, 0);
codeextraarg(fs, k);
return p;
}
}
void luaK_checkstack (FuncState *fs, int n) { void luaK_checkstack (FuncState *fs, int n) {
int newstack = fs->freereg + n; int newstack = fs->freereg + n;
if (newstack > fs->f->maxstacksize) { if (newstack > fs->f->maxstacksize) {
@ -222,42 +284,59 @@ static void freereg (FuncState *fs, int reg) {
static void freeexp (FuncState *fs, expdesc *e) { static void freeexp (FuncState *fs, expdesc *e) {
if (e->k == VNONRELOC) if (e->k == VNONRELOC)
freereg(fs, e->u.s.info); freereg(fs, e->u.info);
} }
static int addk (FuncState *fs, TValue *k, TValue *v) { static int addk (FuncState *fs, TValue *key, TValue *v) {
lua_State *L = fs->L; lua_State *L = fs->ls->L;
TValue *idx = luaH_set(L, fs->h, k); TValue *idx = luaH_set(L, fs->h, key);
Proto *f = fs->f; Proto *f = fs->f;
int oldsize = f->sizek; int k, oldsize;
if (ttisnumber(idx)) { if (ttisnumber(idx)) {
lua_assert(luaO_rawequalObj(&fs->f->k[cast_int(nvalue(idx))], v)); lua_Number n = nvalue(idx);
return cast_int(nvalue(idx)); lua_number2int(k, n);
} if (luaV_rawequalobj(&f->k[k], v))
else { /* constant not found; create a new entry */ return k;
setnvalue(idx, cast_num(fs->nk)); /* else may be a collision (e.g., between 0.0 and "\0\0\0\0\0\0\0\0");
luaM_growvector(L, f->k, fs->nk, f->sizek, TValue, go through and create a new entry for this value */
MAXARG_Bx, "constant table overflow");
while (oldsize < f->sizek) setnilvalue(&f->k[oldsize++]);
setobj(L, &f->k[fs->nk], v);
luaC_barrier(L, f, v);
return fs->nk++;
} }
/* constant not found; create a new entry */
oldsize = f->sizek;
k = fs->nk;
/* numerical value does not need GC barrier;
table has no metatable, so it does not need to invalidate cache */
setnvalue(idx, cast_num(k));
luaM_growvector(L, f->k, k, f->sizek, TValue, MAXARG_Ax, "constants");
while (oldsize < f->sizek) setnilvalue(&f->k[oldsize++]);
setobj(L, &f->k[k], v);
fs->nk++;
luaC_barrier(L, f, v);
return k;
} }
int luaK_stringK (FuncState *fs, TString *s) { int luaK_stringK (FuncState *fs, TString *s) {
TValue o; TValue o;
setsvalue(fs->L, &o, s); setsvalue(fs->ls->L, &o, s);
return addk(fs, &o, &o); return addk(fs, &o, &o);
} }
int luaK_numberK (FuncState *fs, lua_Number r) { int luaK_numberK (FuncState *fs, lua_Number r) {
int n;
lua_State *L = fs->ls->L;
TValue o; TValue o;
setnvalue(&o, r); setnvalue(&o, r);
return addk(fs, &o, &o); if (r == 0 || luai_numisnan(NULL, r)) { /* handle -0 and NaN */
/* use raw representation as key to avoid numeric problems */
setsvalue(L, L->top++, luaS_newlstr(L, (char *)&r, sizeof(r)));
n = addk(fs, L->top - 1, &o);
L->top--;
}
else
n = addk(fs, &o, &o); /* regular case */
return n;
} }
@ -272,7 +351,7 @@ static int nilK (FuncState *fs) {
TValue k, v; TValue k, v;
setnilvalue(&v); setnilvalue(&v);
/* cannot use nil as key; instead use table itself to represent nil */ /* cannot use nil as key; instead use table itself to represent nil */
sethvalue(fs->L, &k, fs->h); sethvalue(fs->ls->L, &k, fs->h);
return addk(fs, &k, &v); return addk(fs, &k, &v);
} }
@ -292,7 +371,7 @@ void luaK_setreturns (FuncState *fs, expdesc *e, int nresults) {
void luaK_setoneret (FuncState *fs, expdesc *e) { void luaK_setoneret (FuncState *fs, expdesc *e) {
if (e->k == VCALL) { /* expression is an open function call? */ if (e->k == VCALL) { /* expression is an open function call? */
e->k = VNONRELOC; e->k = VNONRELOC;
e->u.s.info = GETARG_A(getcode(fs, e)); e->u.info = GETARG_A(getcode(fs, e));
} }
else if (e->k == VVARARG) { else if (e->k == VVARARG) {
SETARG_B(getcode(fs, e), 2); SETARG_B(getcode(fs, e), 2);
@ -308,19 +387,18 @@ void luaK_dischargevars (FuncState *fs, expdesc *e) {
break; break;
} }
case VUPVAL: { case VUPVAL: {
e->u.s.info = luaK_codeABC(fs, OP_GETUPVAL, 0, e->u.s.info, 0); e->u.info = luaK_codeABC(fs, OP_GETUPVAL, 0, e->u.info, 0);
e->k = VRELOCABLE;
break;
}
case VGLOBAL: {
e->u.s.info = luaK_codeABx(fs, OP_GETGLOBAL, 0, e->u.s.info);
e->k = VRELOCABLE; e->k = VRELOCABLE;
break; break;
} }
case VINDEXED: { case VINDEXED: {
freereg(fs, e->u.s.aux); OpCode op = OP_GETTABUP; /* assume 't' is in an upvalue */
freereg(fs, e->u.s.info); freereg(fs, e->u.ind.idx);
e->u.s.info = luaK_codeABC(fs, OP_GETTABLE, 0, e->u.s.info, e->u.s.aux); if (e->u.ind.vt == VLOCAL) { /* 't' is in a register? */
freereg(fs, e->u.ind.t);
op = OP_GETTABLE;
}
e->u.info = luaK_codeABC(fs, op, 0, e->u.ind.t, e->u.ind.idx);
e->k = VRELOCABLE; e->k = VRELOCABLE;
break; break;
} }
@ -347,16 +425,16 @@ static void discharge2reg (FuncState *fs, expdesc *e, int reg) {
luaK_nil(fs, reg, 1); luaK_nil(fs, reg, 1);
break; break;
} }
case VFALSE: case VTRUE: { case VFALSE: case VTRUE: {
luaK_codeABC(fs, OP_LOADBOOL, reg, e->k == VTRUE, 0); luaK_codeABC(fs, OP_LOADBOOL, reg, e->k == VTRUE, 0);
break; break;
} }
case VK: { case VK: {
luaK_codeABx(fs, OP_LOADK, reg, e->u.s.info); luaK_codek(fs, reg, e->u.info);
break; break;
} }
case VKNUM: { case VKNUM: {
luaK_codeABx(fs, OP_LOADK, reg, luaK_numberK(fs, e->u.nval)); luaK_codek(fs, reg, luaK_numberK(fs, e->u.nval));
break; break;
} }
case VRELOCABLE: { case VRELOCABLE: {
@ -365,8 +443,8 @@ static void discharge2reg (FuncState *fs, expdesc *e, int reg) {
break; break;
} }
case VNONRELOC: { case VNONRELOC: {
if (reg != e->u.s.info) if (reg != e->u.info)
luaK_codeABC(fs, OP_MOVE, reg, e->u.s.info, 0); luaK_codeABC(fs, OP_MOVE, reg, e->u.info, 0);
break; break;
} }
default: { default: {
@ -374,7 +452,7 @@ static void discharge2reg (FuncState *fs, expdesc *e, int reg) {
return; /* nothing to do... */ return; /* nothing to do... */
} }
} }
e->u.s.info = reg; e->u.info = reg;
e->k = VNONRELOC; e->k = VNONRELOC;
} }
@ -390,7 +468,7 @@ static void discharge2anyreg (FuncState *fs, expdesc *e) {
static void exp2reg (FuncState *fs, expdesc *e, int reg) { static void exp2reg (FuncState *fs, expdesc *e, int reg) {
discharge2reg(fs, e, reg); discharge2reg(fs, e, reg);
if (e->k == VJMP) if (e->k == VJMP)
luaK_concat(fs, &e->t, e->u.s.info); /* put this jump in `t' list */ luaK_concat(fs, &e->t, e->u.info); /* put this jump in `t' list */
if (hasjumps(e)) { if (hasjumps(e)) {
int final; /* position after whole expression */ int final; /* position after whole expression */
int p_f = NO_JUMP; /* position of an eventual LOAD false */ int p_f = NO_JUMP; /* position of an eventual LOAD false */
@ -406,7 +484,7 @@ static void exp2reg (FuncState *fs, expdesc *e, int reg) {
patchlistaux(fs, e->t, final, reg, p_t); patchlistaux(fs, e->t, final, reg, p_t);
} }
e->f = e->t = NO_JUMP; e->f = e->t = NO_JUMP;
e->u.s.info = reg; e->u.info = reg;
e->k = VNONRELOC; e->k = VNONRELOC;
} }
@ -422,14 +500,20 @@ void luaK_exp2nextreg (FuncState *fs, expdesc *e) {
int luaK_exp2anyreg (FuncState *fs, expdesc *e) { int luaK_exp2anyreg (FuncState *fs, expdesc *e) {
luaK_dischargevars(fs, e); luaK_dischargevars(fs, e);
if (e->k == VNONRELOC) { if (e->k == VNONRELOC) {
if (!hasjumps(e)) return e->u.s.info; /* exp is already in a register */ if (!hasjumps(e)) return e->u.info; /* exp is already in a register */
if (e->u.s.info >= fs->nactvar) { /* reg. is not a local? */ if (e->u.info >= fs->nactvar) { /* reg. is not a local? */
exp2reg(fs, e, e->u.s.info); /* put value on it */ exp2reg(fs, e, e->u.info); /* put value on it */
return e->u.s.info; return e->u.info;
} }
} }
luaK_exp2nextreg(fs, e); /* default */ luaK_exp2nextreg(fs, e); /* default */
return e->u.s.info; return e->u.info;
}
void luaK_exp2anyregup (FuncState *fs, expdesc *e) {
if (e->k != VUPVAL || hasjumps(e))
luaK_exp2anyreg(fs, e);
} }
@ -444,22 +528,24 @@ void luaK_exp2val (FuncState *fs, expdesc *e) {
int luaK_exp2RK (FuncState *fs, expdesc *e) { int luaK_exp2RK (FuncState *fs, expdesc *e) {
luaK_exp2val(fs, e); luaK_exp2val(fs, e);
switch (e->k) { switch (e->k) {
case VKNUM:
case VTRUE: case VTRUE:
case VFALSE: case VFALSE:
case VNIL: { case VNIL: {
if (fs->nk <= MAXINDEXRK) { /* constant fit in RK operand? */ if (fs->nk <= MAXINDEXRK) { /* constant fits in RK operand? */
e->u.s.info = (e->k == VNIL) ? nilK(fs) : e->u.info = (e->k == VNIL) ? nilK(fs) : boolK(fs, (e->k == VTRUE));
(e->k == VKNUM) ? luaK_numberK(fs, e->u.nval) :
boolK(fs, (e->k == VTRUE));
e->k = VK; e->k = VK;
return RKASK(e->u.s.info); return RKASK(e->u.info);
} }
else break; else break;
} }
case VKNUM: {
e->u.info = luaK_numberK(fs, e->u.nval);
e->k = VK;
/* go through */
}
case VK: { case VK: {
if (e->u.s.info <= MAXINDEXRK) /* constant fit in argC? */ if (e->u.info <= MAXINDEXRK) /* constant fits in argC? */
return RKASK(e->u.s.info); return RKASK(e->u.info);
else break; else break;
} }
default: break; default: break;
@ -473,22 +559,18 @@ void luaK_storevar (FuncState *fs, expdesc *var, expdesc *ex) {
switch (var->k) { switch (var->k) {
case VLOCAL: { case VLOCAL: {
freeexp(fs, ex); freeexp(fs, ex);
exp2reg(fs, ex, var->u.s.info); exp2reg(fs, ex, var->u.info);
return; return;
} }
case VUPVAL: { case VUPVAL: {
int e = luaK_exp2anyreg(fs, ex); int e = luaK_exp2anyreg(fs, ex);
luaK_codeABC(fs, OP_SETUPVAL, e, var->u.s.info, 0); luaK_codeABC(fs, OP_SETUPVAL, e, var->u.info, 0);
break;
}
case VGLOBAL: {
int e = luaK_exp2anyreg(fs, ex);
luaK_codeABx(fs, OP_SETGLOBAL, e, var->u.s.info);
break; break;
} }
case VINDEXED: { case VINDEXED: {
OpCode op = (var->u.ind.vt == VLOCAL) ? OP_SETTABLE : OP_SETTABUP;
int e = luaK_exp2RK(fs, ex); int e = luaK_exp2RK(fs, ex);
luaK_codeABC(fs, OP_SETTABLE, var->u.s.info, var->u.s.aux, e); luaK_codeABC(fs, op, var->u.ind.t, var->u.ind.idx, e);
break; break;
} }
default: { default: {
@ -501,20 +583,20 @@ void luaK_storevar (FuncState *fs, expdesc *var, expdesc *ex) {
void luaK_self (FuncState *fs, expdesc *e, expdesc *key) { void luaK_self (FuncState *fs, expdesc *e, expdesc *key) {
int func; int ereg;
luaK_exp2anyreg(fs, e); luaK_exp2anyreg(fs, e);
ereg = e->u.info; /* register where 'e' was placed */
freeexp(fs, e); freeexp(fs, e);
func = fs->freereg; e->u.info = fs->freereg; /* base register for op_self */
luaK_reserveregs(fs, 2);
luaK_codeABC(fs, OP_SELF, func, e->u.s.info, luaK_exp2RK(fs, key));
freeexp(fs, key);
e->u.s.info = func;
e->k = VNONRELOC; e->k = VNONRELOC;
luaK_reserveregs(fs, 2); /* function and 'self' produced by op_self */
luaK_codeABC(fs, OP_SELF, e->u.info, ereg, luaK_exp2RK(fs, key));
freeexp(fs, key);
} }
static void invertjump (FuncState *fs, expdesc *e) { static void invertjump (FuncState *fs, expdesc *e) {
Instruction *pc = getjumpcontrol(fs, e->u.s.info); Instruction *pc = getjumpcontrol(fs, e->u.info);
lua_assert(testTMode(GET_OPCODE(*pc)) && GET_OPCODE(*pc) != OP_TESTSET && lua_assert(testTMode(GET_OPCODE(*pc)) && GET_OPCODE(*pc) != OP_TESTSET &&
GET_OPCODE(*pc) != OP_TEST); GET_OPCODE(*pc) != OP_TEST);
SETARG_A(*pc, !(GETARG_A(*pc))); SETARG_A(*pc, !(GETARG_A(*pc)));
@ -532,7 +614,7 @@ static int jumponcond (FuncState *fs, expdesc *e, int cond) {
} }
discharge2anyreg(fs, e); discharge2anyreg(fs, e);
freeexp(fs, e); freeexp(fs, e);
return condjump(fs, OP_TESTSET, NO_REG, e->u.s.info, cond); return condjump(fs, OP_TESTSET, NO_REG, e->u.info, cond);
} }
@ -540,17 +622,13 @@ void luaK_goiftrue (FuncState *fs, expdesc *e) {
int pc; /* pc of last jump */ int pc; /* pc of last jump */
luaK_dischargevars(fs, e); luaK_dischargevars(fs, e);
switch (e->k) { switch (e->k) {
case VK: case VKNUM: case VTRUE: {
pc = NO_JUMP; /* always true; do nothing */
break;
}
case VFALSE: {
pc = luaK_jump(fs); /* always jump */
break;
}
case VJMP: { case VJMP: {
invertjump(fs, e); invertjump(fs, e);
pc = e->u.s.info; pc = e->u.info;
break;
}
case VK: case VKNUM: case VTRUE: {
pc = NO_JUMP; /* always true; do nothing */
break; break;
} }
default: { default: {
@ -564,22 +642,18 @@ void luaK_goiftrue (FuncState *fs, expdesc *e) {
} }
static void luaK_goiffalse (FuncState *fs, expdesc *e) { void luaK_goiffalse (FuncState *fs, expdesc *e) {
int pc; /* pc of last jump */ int pc; /* pc of last jump */
luaK_dischargevars(fs, e); luaK_dischargevars(fs, e);
switch (e->k) { switch (e->k) {
case VJMP: {
pc = e->u.info;
break;
}
case VNIL: case VFALSE: { case VNIL: case VFALSE: {
pc = NO_JUMP; /* always false; do nothing */ pc = NO_JUMP; /* always false; do nothing */
break; break;
} }
case VTRUE: {
pc = luaK_jump(fs); /* always jump */
break;
}
case VJMP: {
pc = e->u.s.info;
break;
}
default: { default: {
pc = jumponcond(fs, e, 1); pc = jumponcond(fs, e, 1);
break; break;
@ -610,7 +684,7 @@ static void codenot (FuncState *fs, expdesc *e) {
case VNONRELOC: { case VNONRELOC: {
discharge2anyreg(fs, e); discharge2anyreg(fs, e);
freeexp(fs, e); freeexp(fs, e);
e->u.s.info = luaK_codeABC(fs, OP_NOT, 0, e->u.s.info, 0); e->u.info = luaK_codeABC(fs, OP_NOT, 0, e->u.info, 0);
e->k = VRELOCABLE; e->k = VRELOCABLE;
break; break;
} }
@ -627,38 +701,28 @@ static void codenot (FuncState *fs, expdesc *e) {
void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k) { void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k) {
t->u.s.aux = luaK_exp2RK(fs, k); lua_assert(!hasjumps(t));
t->u.ind.t = t->u.info;
t->u.ind.idx = luaK_exp2RK(fs, k);
t->u.ind.vt = (t->k == VUPVAL) ? VUPVAL
: check_exp(vkisinreg(t->k), VLOCAL);
t->k = VINDEXED; t->k = VINDEXED;
} }
static int constfolding (OpCode op, expdesc *e1, expdesc *e2) { static int constfolding (OpCode op, expdesc *e1, expdesc *e2) {
lua_Number v1, v2, r; lua_Number r;
if (!isnumeral(e1) || !isnumeral(e2)) return 0; if (!isnumeral(e1) || !isnumeral(e2)) return 0;
v1 = e1->u.nval; if ((op == OP_DIV || op == OP_MOD) && e2->u.nval == 0)
v2 = e2->u.nval; return 0; /* do not attempt to divide by 0 */
switch (op) { r = luaO_arith(op - OP_ADD + LUA_OPADD, e1->u.nval, e2->u.nval);
case OP_ADD: r = luai_numadd(v1, v2); break;
case OP_SUB: r = luai_numsub(v1, v2); break;
case OP_MUL: r = luai_nummul(v1, v2); break;
case OP_DIV:
if (v2 == 0) return 0; /* do not attempt to divide by 0 */
r = luai_numdiv(v1, v2); break;
case OP_MOD:
if (v2 == 0) return 0; /* do not attempt to divide by 0 */
r = luai_nummod(v1, v2); break;
case OP_POW: r = luai_numpow(v1, v2); break;
case OP_UNM: r = luai_numunm(v1); break;
case OP_LEN: return 0; /* no constant folding for 'len' */
default: lua_assert(0); r = 0; break;
}
if (luai_numisnan(r)) return 0; /* do not attempt to produce NaN */
e1->u.nval = r; e1->u.nval = r;
return 1; return 1;
} }
static void codearith (FuncState *fs, OpCode op, expdesc *e1, expdesc *e2) { static void codearith (FuncState *fs, OpCode op,
expdesc *e1, expdesc *e2, int line) {
if (constfolding(op, e1, e2)) if (constfolding(op, e1, e2))
return; return;
else { else {
@ -672,8 +736,9 @@ static void codearith (FuncState *fs, OpCode op, expdesc *e1, expdesc *e2) {
freeexp(fs, e2); freeexp(fs, e2);
freeexp(fs, e1); freeexp(fs, e1);
} }
e1->u.s.info = luaK_codeABC(fs, op, 0, o1, o2); e1->u.info = luaK_codeABC(fs, op, 0, o1, o2);
e1->k = VRELOCABLE; e1->k = VRELOCABLE;
luaK_fixline(fs, line);
} }
} }
@ -689,25 +754,28 @@ static void codecomp (FuncState *fs, OpCode op, int cond, expdesc *e1,
temp = o1; o1 = o2; o2 = temp; /* o1 <==> o2 */ temp = o1; o1 = o2; o2 = temp; /* o1 <==> o2 */
cond = 1; cond = 1;
} }
e1->u.s.info = condjump(fs, op, cond, o1, o2); e1->u.info = condjump(fs, op, cond, o1, o2);
e1->k = VJMP; e1->k = VJMP;
} }
void luaK_prefix (FuncState *fs, UnOpr op, expdesc *e) { void luaK_prefix (FuncState *fs, UnOpr op, expdesc *e, int line) {
expdesc e2; expdesc e2;
e2.t = e2.f = NO_JUMP; e2.k = VKNUM; e2.u.nval = 0; e2.t = e2.f = NO_JUMP; e2.k = VKNUM; e2.u.nval = 0;
switch (op) { switch (op) {
case OPR_MINUS: { case OPR_MINUS: {
if (!isnumeral(e)) if (isnumeral(e)) /* minus constant? */
luaK_exp2anyreg(fs, e); /* cannot operate on non-numeric constants */ e->u.nval = luai_numunm(NULL, e->u.nval); /* fold it */
codearith(fs, OP_UNM, e, &e2); else {
luaK_exp2anyreg(fs, e);
codearith(fs, OP_UNM, e, &e2, line);
}
break; break;
} }
case OPR_NOT: codenot(fs, e); break; case OPR_NOT: codenot(fs, e); break;
case OPR_LEN: { case OPR_LEN: {
luaK_exp2anyreg(fs, e); /* cannot operate on constants */ luaK_exp2anyreg(fs, e); /* cannot operate on constants */
codearith(fs, OP_LEN, e, &e2); codearith(fs, OP_LEN, e, &e2, line);
break; break;
} }
default: lua_assert(0); default: lua_assert(0);
@ -742,7 +810,8 @@ void luaK_infix (FuncState *fs, BinOpr op, expdesc *v) {
} }
void luaK_posfix (FuncState *fs, BinOpr op, expdesc *e1, expdesc *e2) { void luaK_posfix (FuncState *fs, BinOpr op,
expdesc *e1, expdesc *e2, int line) {
switch (op) { switch (op) {
case OPR_AND: { case OPR_AND: {
lua_assert(e1->t == NO_JUMP); /* list must be closed */ lua_assert(e1->t == NO_JUMP); /* list must be closed */
@ -761,29 +830,30 @@ void luaK_posfix (FuncState *fs, BinOpr op, expdesc *e1, expdesc *e2) {
case OPR_CONCAT: { case OPR_CONCAT: {
luaK_exp2val(fs, e2); luaK_exp2val(fs, e2);
if (e2->k == VRELOCABLE && GET_OPCODE(getcode(fs, e2)) == OP_CONCAT) { if (e2->k == VRELOCABLE && GET_OPCODE(getcode(fs, e2)) == OP_CONCAT) {
lua_assert(e1->u.s.info == GETARG_B(getcode(fs, e2))-1); lua_assert(e1->u.info == GETARG_B(getcode(fs, e2))-1);
freeexp(fs, e1); freeexp(fs, e1);
SETARG_B(getcode(fs, e2), e1->u.s.info); SETARG_B(getcode(fs, e2), e1->u.info);
e1->k = VRELOCABLE; e1->u.s.info = e2->u.s.info; e1->k = VRELOCABLE; e1->u.info = e2->u.info;
} }
else { else {
luaK_exp2nextreg(fs, e2); /* operand must be on the 'stack' */ luaK_exp2nextreg(fs, e2); /* operand must be on the 'stack' */
codearith(fs, OP_CONCAT, e1, e2); codearith(fs, OP_CONCAT, e1, e2, line);
} }
break; break;
} }
case OPR_ADD: codearith(fs, OP_ADD, e1, e2); break; case OPR_ADD: case OPR_SUB: case OPR_MUL: case OPR_DIV:
case OPR_SUB: codearith(fs, OP_SUB, e1, e2); break; case OPR_MOD: case OPR_POW: {
case OPR_MUL: codearith(fs, OP_MUL, e1, e2); break; codearith(fs, cast(OpCode, op - OPR_ADD + OP_ADD), e1, e2, line);
case OPR_DIV: codearith(fs, OP_DIV, e1, e2); break; break;
case OPR_MOD: codearith(fs, OP_MOD, e1, e2); break; }
case OPR_POW: codearith(fs, OP_POW, e1, e2); break; case OPR_EQ: case OPR_LT: case OPR_LE: {
case OPR_EQ: codecomp(fs, OP_EQ, 1, e1, e2); break; codecomp(fs, cast(OpCode, op - OPR_EQ + OP_EQ), 1, e1, e2);
case OPR_NE: codecomp(fs, OP_EQ, 0, e1, e2); break; break;
case OPR_LT: codecomp(fs, OP_LT, 1, e1, e2); break; }
case OPR_LE: codecomp(fs, OP_LE, 1, e1, e2); break; case OPR_NE: case OPR_GT: case OPR_GE: {
case OPR_GT: codecomp(fs, OP_LT, 0, e1, e2); break; codecomp(fs, cast(OpCode, op - OPR_NE + OP_EQ), 0, e1, e2);
case OPR_GE: codecomp(fs, OP_LE, 0, e1, e2); break; break;
}
default: lua_assert(0); default: lua_assert(0);
} }
} }
@ -794,46 +864,18 @@ void luaK_fixline (FuncState *fs, int line) {
} }
static int luaK_code (FuncState *fs, Instruction i, int line) {
Proto *f = fs->f;
dischargejpc(fs); /* `pc' will change */
/* put new instruction in code array */
luaM_growvector(fs->L, f->code, fs->pc, f->sizecode, Instruction,
MAX_INT, "code size overflow");
f->code[fs->pc] = i;
/* save corresponding line information */
luaM_growvector(fs->L, f->lineinfo, fs->pc, f->sizelineinfo, int,
MAX_INT, "code size overflow");
f->lineinfo[fs->pc] = line;
return fs->pc++;
}
int luaK_codeABC (FuncState *fs, OpCode o, int a, int b, int c) {
lua_assert(getOpMode(o) == iABC);
lua_assert(getBMode(o) != OpArgN || b == 0);
lua_assert(getCMode(o) != OpArgN || c == 0);
return luaK_code(fs, CREATE_ABC(o, a, b, c), fs->ls->lastline);
}
int luaK_codeABx (FuncState *fs, OpCode o, int a, unsigned int bc) {
lua_assert(getOpMode(o) == iABx || getOpMode(o) == iAsBx);
lua_assert(getCMode(o) == OpArgN);
return luaK_code(fs, CREATE_ABx(o, a, bc), fs->ls->lastline);
}
void luaK_setlist (FuncState *fs, int base, int nelems, int tostore) { void luaK_setlist (FuncState *fs, int base, int nelems, int tostore) {
int c = (nelems - 1)/LFIELDS_PER_FLUSH + 1; int c = (nelems - 1)/LFIELDS_PER_FLUSH + 1;
int b = (tostore == LUA_MULTRET) ? 0 : tostore; int b = (tostore == LUA_MULTRET) ? 0 : tostore;
lua_assert(tostore != 0); lua_assert(tostore != 0);
if (c <= MAXARG_C) if (c <= MAXARG_C)
luaK_codeABC(fs, OP_SETLIST, base, b, c); luaK_codeABC(fs, OP_SETLIST, base, b, c);
else { else if (c <= MAXARG_Ax) {
luaK_codeABC(fs, OP_SETLIST, base, b, 0); luaK_codeABC(fs, OP_SETLIST, base, b, 0);
luaK_code(fs, cast(Instruction, c), fs->ls->lastline); codeextraarg(fs, c);
} }
else
luaX_syntaxerror(fs->ls, "constructor too long");
fs->freereg = base + 1; /* free registers with list values */ fs->freereg = base + 1; /* free registers with list values */
} }

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: lcode.h,v 1.58.1.1 2013/04/12 18:48:47 roberto Exp $
** Code generator for Lua ** Code generator for Lua
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -21,13 +21,13 @@
/* /*
** grep "ORDER OPR" if you change these enums ** grep "ORDER OPR" if you change these enums (ORDER OP)
*/ */
typedef enum BinOpr { typedef enum BinOpr {
OPR_ADD, OPR_SUB, OPR_MUL, OPR_DIV, OPR_MOD, OPR_POW, OPR_ADD, OPR_SUB, OPR_MUL, OPR_DIV, OPR_MOD, OPR_POW,
OPR_CONCAT, OPR_CONCAT,
OPR_NE, OPR_EQ, OPR_EQ, OPR_LT, OPR_LE,
OPR_LT, OPR_LE, OPR_GT, OPR_GE, OPR_NE, OPR_GT, OPR_GE,
OPR_AND, OPR_OR, OPR_AND, OPR_OR,
OPR_NOBINOPR OPR_NOBINOPR
} BinOpr; } BinOpr;
@ -36,14 +36,17 @@ typedef enum BinOpr {
typedef enum UnOpr { OPR_MINUS, OPR_NOT, OPR_LEN, OPR_NOUNOPR } UnOpr; typedef enum UnOpr { OPR_MINUS, OPR_NOT, OPR_LEN, OPR_NOUNOPR } UnOpr;
#define getcode(fs,e) ((fs)->f->code[(e)->u.s.info]) #define getcode(fs,e) ((fs)->f->code[(e)->u.info])
#define luaK_codeAsBx(fs,o,A,sBx) luaK_codeABx(fs,o,A,(sBx)+MAXARG_sBx) #define luaK_codeAsBx(fs,o,A,sBx) luaK_codeABx(fs,o,A,(sBx)+MAXARG_sBx)
#define luaK_setmultret(fs,e) luaK_setreturns(fs, e, LUA_MULTRET) #define luaK_setmultret(fs,e) luaK_setreturns(fs, e, LUA_MULTRET)
#define luaK_jumpto(fs,t) luaK_patchlist(fs, luaK_jump(fs), t)
LUAI_FUNC int luaK_codeABx (FuncState *fs, OpCode o, int A, unsigned int Bx); LUAI_FUNC int luaK_codeABx (FuncState *fs, OpCode o, int A, unsigned int Bx);
LUAI_FUNC int luaK_codeABC (FuncState *fs, OpCode o, int A, int B, int C); LUAI_FUNC int luaK_codeABC (FuncState *fs, OpCode o, int A, int B, int C);
LUAI_FUNC int luaK_codek (FuncState *fs, int reg, int k);
LUAI_FUNC void luaK_fixline (FuncState *fs, int line); LUAI_FUNC void luaK_fixline (FuncState *fs, int line);
LUAI_FUNC void luaK_nil (FuncState *fs, int from, int n); LUAI_FUNC void luaK_nil (FuncState *fs, int from, int n);
LUAI_FUNC void luaK_reserveregs (FuncState *fs, int n); LUAI_FUNC void luaK_reserveregs (FuncState *fs, int n);
@ -52,12 +55,14 @@ LUAI_FUNC int luaK_stringK (FuncState *fs, TString *s);
LUAI_FUNC int luaK_numberK (FuncState *fs, lua_Number r); LUAI_FUNC int luaK_numberK (FuncState *fs, lua_Number r);
LUAI_FUNC void luaK_dischargevars (FuncState *fs, expdesc *e); LUAI_FUNC void luaK_dischargevars (FuncState *fs, expdesc *e);
LUAI_FUNC int luaK_exp2anyreg (FuncState *fs, expdesc *e); LUAI_FUNC int luaK_exp2anyreg (FuncState *fs, expdesc *e);
LUAI_FUNC void luaK_exp2anyregup (FuncState *fs, expdesc *e);
LUAI_FUNC void luaK_exp2nextreg (FuncState *fs, expdesc *e); LUAI_FUNC void luaK_exp2nextreg (FuncState *fs, expdesc *e);
LUAI_FUNC void luaK_exp2val (FuncState *fs, expdesc *e); LUAI_FUNC void luaK_exp2val (FuncState *fs, expdesc *e);
LUAI_FUNC int luaK_exp2RK (FuncState *fs, expdesc *e); LUAI_FUNC int luaK_exp2RK (FuncState *fs, expdesc *e);
LUAI_FUNC void luaK_self (FuncState *fs, expdesc *e, expdesc *key); LUAI_FUNC void luaK_self (FuncState *fs, expdesc *e, expdesc *key);
LUAI_FUNC void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k); LUAI_FUNC void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k);
LUAI_FUNC void luaK_goiftrue (FuncState *fs, expdesc *e); LUAI_FUNC void luaK_goiftrue (FuncState *fs, expdesc *e);
LUAI_FUNC void luaK_goiffalse (FuncState *fs, expdesc *e);
LUAI_FUNC void luaK_storevar (FuncState *fs, expdesc *var, expdesc *e); LUAI_FUNC void luaK_storevar (FuncState *fs, expdesc *var, expdesc *e);
LUAI_FUNC void luaK_setreturns (FuncState *fs, expdesc *e, int nresults); LUAI_FUNC void luaK_setreturns (FuncState *fs, expdesc *e, int nresults);
LUAI_FUNC void luaK_setoneret (FuncState *fs, expdesc *e); LUAI_FUNC void luaK_setoneret (FuncState *fs, expdesc *e);
@ -65,11 +70,13 @@ LUAI_FUNC int luaK_jump (FuncState *fs);
LUAI_FUNC void luaK_ret (FuncState *fs, int first, int nret); LUAI_FUNC void luaK_ret (FuncState *fs, int first, int nret);
LUAI_FUNC void luaK_patchlist (FuncState *fs, int list, int target); LUAI_FUNC void luaK_patchlist (FuncState *fs, int list, int target);
LUAI_FUNC void luaK_patchtohere (FuncState *fs, int list); LUAI_FUNC void luaK_patchtohere (FuncState *fs, int list);
LUAI_FUNC void luaK_patchclose (FuncState *fs, int list, int level);
LUAI_FUNC void luaK_concat (FuncState *fs, int *l1, int l2); LUAI_FUNC void luaK_concat (FuncState *fs, int *l1, int l2);
LUAI_FUNC int luaK_getlabel (FuncState *fs); LUAI_FUNC int luaK_getlabel (FuncState *fs);
LUAI_FUNC void luaK_prefix (FuncState *fs, UnOpr op, expdesc *v); LUAI_FUNC void luaK_prefix (FuncState *fs, UnOpr op, expdesc *v, int line);
LUAI_FUNC void luaK_infix (FuncState *fs, BinOpr op, expdesc *v); LUAI_FUNC void luaK_infix (FuncState *fs, BinOpr op, expdesc *v);
LUAI_FUNC void luaK_posfix (FuncState *fs, BinOpr op, expdesc *v1, expdesc *v2); LUAI_FUNC void luaK_posfix (FuncState *fs, BinOpr op, expdesc *v1,
expdesc *v2, int line);
LUAI_FUNC void luaK_setlist (FuncState *fs, int base, int nelems, int tostore); LUAI_FUNC void luaK_setlist (FuncState *fs, int base, int nelems, int tostore);

95
apps/plugins/lua/lctype.h Normal file
View file

@ -0,0 +1,95 @@
/*
** $Id: lctype.h,v 1.12.1.1 2013/04/12 18:48:47 roberto Exp $
** 'ctype' functions for Lua
** See Copyright Notice in lua.h
*/
#ifndef lctype_h
#define lctype_h
#include "lua.h"
/*
** WARNING: the functions defined here do not necessarily correspond
** to the similar functions in the standard C ctype.h. They are
** optimized for the specific needs of Lua
*/
#if !defined(LUA_USE_CTYPE)
#if 'A' == 65 && '0' == 48
/* ASCII case: can use its own tables; faster and fixed */
#define LUA_USE_CTYPE 0
#else
/* must use standard C ctype */
#define LUA_USE_CTYPE 1
#endif
#endif
#if !LUA_USE_CTYPE /* { */
#include <limits.h>
#include "llimits.h"
#define ALPHABIT 0
#define DIGITBIT 1
#define PRINTBIT 2
#define SPACEBIT 3
#define XDIGITBIT 4
#define MASK(B) (1 << (B))
/*
** add 1 to char to allow index -1 (EOZ)
*/
#define testprop(c,p) (luai_ctype_[(c)+1] & (p))
/*
** 'lalpha' (Lua alphabetic) and 'lalnum' (Lua alphanumeric) both include '_'
*/
#define lislalpha(c) testprop(c, MASK(ALPHABIT))
#define lislalnum(c) testprop(c, (MASK(ALPHABIT) | MASK(DIGITBIT)))
#define lisdigit(c) testprop(c, MASK(DIGITBIT))
#define lisspace(c) testprop(c, MASK(SPACEBIT))
#define lisprint(c) testprop(c, MASK(PRINTBIT))
#define lisxdigit(c) testprop(c, MASK(XDIGITBIT))
/*
** this 'ltolower' only works for alphabetic characters
*/
#define ltolower(c) ((c) | ('A' ^ 'a'))
/* two more entries for 0 and -1 (EOZ) */
LUAI_DDEC const lu_byte luai_ctype_[UCHAR_MAX + 2];
#else /* }{ */
/*
** use standard C ctypes
*/
#include <ctype.h>
#define lislalpha(c) (isalpha(c) || (c) == '_')
#define lislalnum(c) (isalnum(c) || (c) == '_')
#define lisdigit(c) (isdigit(c))
#define lisspace(c) (isspace(c))
#define lisprint(c) (isprint(c))
#define lisxdigit(c) (isxdigit(c))
#define ltolower(c) (tolower(c))
#endif /* } */
#endif

View file

@ -1,5 +1,5 @@
/* /*
** $Id: ldebug.c,v 2.29.1.6 2008/05/08 16:56:26 roberto Exp $ ** $Id: ldebug.c,v 2.90.1.3 2013/05/16 16:04:15 roberto Exp $
** Debug Interface ** Debug Interface
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -30,23 +30,20 @@
#define noLuaClosure(f) ((f) == NULL || (f)->c.tt == LUA_TCCL)
static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name); static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name);
static int currentpc (lua_State *L, CallInfo *ci) { static int currentpc (CallInfo *ci) {
if (!isLua(ci)) return -1; /* function is not a Lua function? */ lua_assert(isLua(ci));
if (ci == L->ci) return pcRel(ci->u.l.savedpc, ci_func(ci)->p);
ci->savedpc = L->savedpc;
return pcRel(ci->savedpc, ci_func(ci)->l.p);
} }
static int currentline (lua_State *L, CallInfo *ci) { static int currentline (CallInfo *ci) {
int pc = currentpc(L, ci); return getfuncline(ci_func(ci)->p, currentpc(ci));
if (pc < 0)
return -1; /* only active lua functions have current-line information */
else
return getline(ci_func(ci)->l.p, pc);
} }
@ -58,6 +55,8 @@ LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
mask = 0; mask = 0;
func = NULL; func = NULL;
} }
if (isLua(L->ci))
L->oldpc = L->ci->u.l.savedpc;
L->hook = func; L->hook = func;
L->basehookcount = count; L->basehookcount = count;
resethookcount(L); resethookcount(L);
@ -84,19 +83,13 @@ LUA_API int lua_gethookcount (lua_State *L) {
LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) { LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) {
int status; int status;
CallInfo *ci; CallInfo *ci;
if (level < 0) return 0; /* invalid (negative) level */
lua_lock(L); lua_lock(L);
for (ci = L->ci; level > 0 && ci > L->base_ci; ci--) { for (ci = L->ci; level > 0 && ci != &L->base_ci; ci = ci->previous)
level--; level--;
if (f_isLua(ci)) /* Lua function? */ if (level == 0 && ci != &L->base_ci) { /* level found? */
level -= ci->tailcalls; /* skip lost tail calls */
}
if (level == 0 && ci > L->base_ci) { /* level found? */
status = 1; status = 1;
ar->i_ci = cast_int(ci - L->base_ci); ar->i_ci = ci;
}
else if (level < 0) { /* level is of a lost tail call? */
status = 1;
ar->i_ci = 0;
} }
else status = 0; /* no such level */ else status = 0; /* no such level */
lua_unlock(L); lua_unlock(L);
@ -104,43 +97,78 @@ LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) {
} }
static Proto *getluaproto (CallInfo *ci) { static const char *upvalname (Proto *p, int uv) {
return (isLua(ci) ? ci_func(ci)->l.p : NULL); TString *s = check_exp(uv < p->sizeupvalues, p->upvalues[uv].name);
if (s == NULL) return "?";
else return getstr(s);
} }
static const char *findlocal (lua_State *L, CallInfo *ci, int n) { static const char *findvararg (CallInfo *ci, int n, StkId *pos) {
const char *name; int nparams = clLvalue(ci->func)->p->numparams;
Proto *fp = getluaproto(ci); if (n >= ci->u.l.base - ci->func - nparams)
if (fp && (name = luaF_getlocalname(fp, n, currentpc(L, ci))) != NULL) return NULL; /* no such vararg */
return name; /* is a local variable in a Lua function */
else { else {
StkId limit = (ci == L->ci) ? L->top : (ci+1)->func; *pos = ci->func + nparams + n;
if (limit - ci->base >= n && n > 0) /* is 'n' inside 'ci' stack? */ return "(*vararg)"; /* generic name for any vararg */
return "(*temporary)";
else
return NULL;
} }
} }
static const char *findlocal (lua_State *L, CallInfo *ci, int n,
StkId *pos) {
const char *name = NULL;
StkId base;
if (isLua(ci)) {
if (n < 0) /* access to vararg values? */
return findvararg(ci, -n, pos);
else {
base = ci->u.l.base;
name = luaF_getlocalname(ci_func(ci)->p, n, currentpc(ci));
}
}
else
base = ci->func + 1;
if (name == NULL) { /* no 'standard' name? */
StkId limit = (ci == L->ci) ? L->top : ci->next->func;
if (limit - base >= n && n > 0) /* is 'n' inside 'ci' stack? */
name = "(*temporary)"; /* generic name for any valid slot */
else
return NULL; /* no name */
}
*pos = base + (n - 1);
return name;
}
LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) { LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
CallInfo *ci = L->base_ci + ar->i_ci; const char *name;
const char *name = findlocal(L, ci, n);
lua_lock(L); lua_lock(L);
if (name) if (ar == NULL) { /* information about non-active function? */
luaA_pushobject(L, ci->base + (n - 1)); if (!isLfunction(L->top - 1)) /* not a Lua function? */
name = NULL;
else /* consider live variables at function start (parameters) */
name = luaF_getlocalname(clLvalue(L->top - 1)->p, n, 0);
}
else { /* active function; get information through 'ar' */
StkId pos = 0; /* to avoid warnings */
name = findlocal(L, ar->i_ci, n, &pos);
if (name) {
setobj2s(L, L->top, pos);
api_incr_top(L);
}
}
lua_unlock(L); lua_unlock(L);
return name; return name;
} }
LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) { LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {
CallInfo *ci = L->base_ci + ar->i_ci; StkId pos = 0; /* to avoid warnings */
const char *name = findlocal(L, ci, n); const char *name = findlocal(L, ar->i_ci, n, &pos);
lua_lock(L); lua_lock(L);
if (name) if (name)
setobjs2s(L, ci->base + (n - 1), L->top - 1); setobjs2s(L, pos, L->top - 1);
L->top--; /* pop value */ L->top--; /* pop value */
lua_unlock(L); lua_unlock(L);
return name; return name;
@ -148,55 +176,45 @@ LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {
static void funcinfo (lua_Debug *ar, Closure *cl) { static void funcinfo (lua_Debug *ar, Closure *cl) {
if (cl->c.isC) { if (noLuaClosure(cl)) {
ar->source = "=[C]"; ar->source = "=[C]";
ar->linedefined = -1; ar->linedefined = -1;
ar->lastlinedefined = -1; ar->lastlinedefined = -1;
ar->what = "C"; ar->what = "C";
} }
else { else {
ar->source = getstr(cl->l.p->source); Proto *p = cl->l.p;
ar->linedefined = cl->l.p->linedefined; ar->source = p->source ? getstr(p->source) : "=?";
ar->lastlinedefined = cl->l.p->lastlinedefined; ar->linedefined = p->linedefined;
ar->lastlinedefined = p->lastlinedefined;
ar->what = (ar->linedefined == 0) ? "main" : "Lua"; ar->what = (ar->linedefined == 0) ? "main" : "Lua";
} }
luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE); luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
} }
static void info_tailcall (lua_Debug *ar) {
ar->name = ar->namewhat = "";
ar->what = "tail";
ar->lastlinedefined = ar->linedefined = ar->currentline = -1;
ar->source = "=(tail call)";
luaO_chunkid(ar->short_src, ar->source, LUA_IDSIZE);
ar->nups = 0;
}
static void collectvalidlines (lua_State *L, Closure *f) { static void collectvalidlines (lua_State *L, Closure *f) {
if (f == NULL || f->c.isC) { if (noLuaClosure(f)) {
setnilvalue(L->top); setnilvalue(L->top);
api_incr_top(L);
} }
else { else {
Table *t = luaH_new(L, 0, 0);
int *lineinfo = f->l.p->lineinfo;
int i; int i;
for (i=0; i<f->l.p->sizelineinfo; i++) TValue v;
setbvalue(luaH_setnum(L, t, lineinfo[i]), 1); int *lineinfo = f->l.p->lineinfo;
sethvalue(L, L->top, t); Table *t = luaH_new(L); /* new table to store active lines */
sethvalue(L, L->top, t); /* push it on stack */
api_incr_top(L);
setbvalue(&v, 1); /* boolean 'true' to be the value of all indices */
for (i = 0; i < f->l.p->sizelineinfo; i++) /* for all lines with code */
luaH_setint(L, t, lineinfo[i], &v); /* table[line] = true */
} }
incr_top(L);
} }
static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar, static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,
Closure *f, CallInfo *ci) { Closure *f, CallInfo *ci) {
int status = 1; int status = 1;
if (f == NULL) {
info_tailcall(ar);
return status;
}
for (; *what; what++) { for (; *what; what++) {
switch (*what) { switch (*what) {
case 'S': { case 'S': {
@ -204,15 +222,31 @@ static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,
break; break;
} }
case 'l': { case 'l': {
ar->currentline = (ci) ? currentline(L, ci) : -1; ar->currentline = (ci && isLua(ci)) ? currentline(ci) : -1;
break; break;
} }
case 'u': { case 'u': {
ar->nups = f->c.nupvalues; ar->nups = (f == NULL) ? 0 : f->c.nupvalues;
if (noLuaClosure(f)) {
ar->isvararg = 1;
ar->nparams = 0;
}
else {
ar->isvararg = f->l.p->is_vararg;
ar->nparams = f->l.p->numparams;
}
break;
}
case 't': {
ar->istailcall = (ci) ? ci->callstatus & CIST_TAIL : 0;
break; break;
} }
case 'n': { case 'n': {
ar->namewhat = (ci) ? getfuncname(L, ci, &ar->name) : NULL; /* calling function is a known Lua function? */
if (ci && !(ci->callstatus & CIST_TAIL) && isLua(ci->previous))
ar->namewhat = getfuncname(L, ci->previous, &ar->name);
else
ar->namewhat = NULL;
if (ar->namewhat == NULL) { if (ar->namewhat == NULL) {
ar->namewhat = ""; /* not found */ ar->namewhat = ""; /* not found */
ar->name = NULL; ar->name = NULL;
@ -231,29 +265,30 @@ static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,
LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) { LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
int status; int status;
Closure *f = NULL; Closure *cl;
CallInfo *ci = NULL; CallInfo *ci;
StkId func;
lua_lock(L); lua_lock(L);
if (*what == '>') { if (*what == '>') {
StkId func = L->top - 1; ci = NULL;
luai_apicheck(L, ttisfunction(func)); func = L->top - 1;
api_check(L, ttisfunction(func), "function expected");
what++; /* skip the '>' */ what++; /* skip the '>' */
f = clvalue(func);
L->top--; /* pop function */ L->top--; /* pop function */
} }
else if (ar->i_ci != 0) { /* no tail call? */ else {
ci = L->base_ci + ar->i_ci; ci = ar->i_ci;
func = ci->func;
lua_assert(ttisfunction(ci->func)); lua_assert(ttisfunction(ci->func));
f = clvalue(ci->func);
} }
status = auxgetinfo(L, what, ar, f, ci); cl = ttisclosure(func) ? clvalue(func) : NULL;
status = auxgetinfo(L, what, ar, cl, ci);
if (strchr(what, 'f')) { if (strchr(what, 'f')) {
if (f == NULL) setnilvalue(L->top); setobjs2s(L, L->top, func);
else setclvalue(L, L->top, f); api_incr_top(L);
incr_top(L);
} }
if (strchr(what, 'L')) if (strchr(what, 'L'))
collectvalidlines(L, f); collectvalidlines(L, cl);
lua_unlock(L); lua_unlock(L);
return status; return status;
} }
@ -261,315 +296,231 @@ LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
/* /*
** {====================================================== ** {======================================================
** Symbolic Execution and code checker ** Symbolic Execution
** ======================================================= ** =======================================================
*/ */
#define check(x) if (!(x)) return 0; static const char *getobjname (Proto *p, int lastpc, int reg,
const char **name);
#define checkjump(pt,pc) check(0 <= pc && pc < pt->sizecode)
#define checkreg(pt,reg) check((reg) < (pt)->maxstacksize)
/*
static int precheck (const Proto *pt) { ** find a "name" for the RK value 'c'
check(pt->maxstacksize <= MAXSTACK); */
check(pt->numparams+(pt->is_vararg & VARARG_HASARG) <= pt->maxstacksize); static void kname (Proto *p, int pc, int c, const char **name) {
check(!(pt->is_vararg & VARARG_NEEDSARG) || if (ISK(c)) { /* is 'c' a constant? */
(pt->is_vararg & VARARG_HASARG)); TValue *kvalue = &p->k[INDEXK(c)];
check(pt->sizeupvalues <= pt->nups); if (ttisstring(kvalue)) { /* literal constant? */
check(pt->sizelineinfo == pt->sizecode || pt->sizelineinfo == 0); *name = svalue(kvalue); /* it is its own name */
check(pt->sizecode > 0 && GET_OPCODE(pt->code[pt->sizecode-1]) == OP_RETURN); return;
return 1;
}
#define checkopenop(pt,pc) luaG_checkopenop((pt)->code[(pc)+1])
int luaG_checkopenop (Instruction i) {
switch (GET_OPCODE(i)) {
case OP_CALL:
case OP_TAILCALL:
case OP_RETURN:
case OP_SETLIST: {
check(GETARG_B(i) == 0);
return 1;
} }
default: return 0; /* invalid instruction after an open call */ /* else no reasonable name found */
} }
else { /* 'c' is a register */
const char *what = getobjname(p, pc, c, name); /* search for 'c' */
if (what && *what == 'c') { /* found a constant name? */
return; /* 'name' already filled */
}
/* else no reasonable name found */
}
*name = "?"; /* no reasonable name found */
} }
static int checkArgMode (const Proto *pt, int r, enum OpArgMask mode) { static int filterpc (int pc, int jmptarget) {
switch (mode) { if (pc < jmptarget) /* is code conditional (inside a jump)? */
case OpArgN: check(r == 0); break; return -1; /* cannot know who sets that register */
case OpArgU: break; else return pc; /* current position sets that register */
case OpArgR: checkreg(pt, r); break;
case OpArgK:
check(ISK(r) ? INDEXK(r) < pt->sizek : r < pt->maxstacksize);
break;
}
return 1;
} }
static Instruction symbexec (const Proto *pt, int lastpc, int reg) { /*
** try to find last instruction before 'lastpc' that modified register 'reg'
*/
static int findsetreg (Proto *p, int lastpc, int reg) {
int pc; int pc;
int last; /* stores position of last instruction that changed `reg' */ int setreg = -1; /* keep last instruction that changed 'reg' */
last = pt->sizecode-1; /* points to final return (a `neutral' instruction) */ int jmptarget = 0; /* any code before this address is conditional */
check(precheck(pt));
for (pc = 0; pc < lastpc; pc++) { for (pc = 0; pc < lastpc; pc++) {
Instruction i = pt->code[pc]; Instruction i = p->code[pc];
OpCode op = GET_OPCODE(i); OpCode op = GET_OPCODE(i);
int a = GETARG_A(i); int a = GETARG_A(i);
int b = 0;
int c = 0;
check(op < NUM_OPCODES);
checkreg(pt, a);
switch (getOpMode(op)) {
case iABC: {
b = GETARG_B(i);
c = GETARG_C(i);
check(checkArgMode(pt, b, getBMode(op)));
check(checkArgMode(pt, c, getCMode(op)));
break;
}
case iABx: {
b = GETARG_Bx(i);
if (getBMode(op) == OpArgK) check(b < pt->sizek);
break;
}
case iAsBx: {
b = GETARG_sBx(i);
if (getBMode(op) == OpArgR) {
int dest = pc+1+b;
check(0 <= dest && dest < pt->sizecode);
if (dest > 0) {
int j;
/* check that it does not jump to a setlist count; this
is tricky, because the count from a previous setlist may
have the same value of an invalid setlist; so, we must
go all the way back to the first of them (if any) */
for (j = 0; j < dest; j++) {
Instruction d = pt->code[dest-1-j];
if (!(GET_OPCODE(d) == OP_SETLIST && GETARG_C(d) == 0)) break;
}
/* if 'j' is even, previous value is not a setlist (even if
it looks like one) */
check((j&1) == 0);
}
}
break;
}
}
if (testAMode(op)) {
if (a == reg) last = pc; /* change register `a' */
}
if (testTMode(op)) {
check(pc+2 < pt->sizecode); /* check skip */
check(GET_OPCODE(pt->code[pc+1]) == OP_JMP);
}
switch (op) { switch (op) {
case OP_LOADBOOL: {
if (c == 1) { /* does it jump? */
check(pc+2 < pt->sizecode); /* check its jump */
check(GET_OPCODE(pt->code[pc+1]) != OP_SETLIST ||
GETARG_C(pt->code[pc+1]) != 0);
}
break;
}
case OP_LOADNIL: { case OP_LOADNIL: {
if (a <= reg && reg <= b) int b = GETARG_B(i);
last = pc; /* set registers from `a' to `b' */ if (a <= reg && reg <= a + b) /* set registers from 'a' to 'a+b' */
setreg = filterpc(pc, jmptarget);
break; break;
} }
case OP_GETUPVAL: case OP_TFORCALL: {
case OP_SETUPVAL: { if (reg >= a + 2) /* affect all regs above its base */
check(b < pt->nups); setreg = filterpc(pc, jmptarget);
break;
}
case OP_GETGLOBAL:
case OP_SETGLOBAL: {
check(ttisstring(&pt->k[b]));
break;
}
case OP_SELF: {
checkreg(pt, a+1);
if (reg == a+1) last = pc;
break;
}
case OP_CONCAT: {
check(b < c); /* at least two operands */
break;
}
case OP_TFORLOOP: {
check(c >= 1); /* at least one result (control variable) */
checkreg(pt, a+2+c); /* space for results */
if (reg >= a+2) last = pc; /* affect all regs above its base */
break;
}
case OP_FORLOOP:
case OP_FORPREP:
checkreg(pt, a+3);
/* go through */
case OP_JMP: {
int dest = pc+1+b;
/* not full check and jump is forward and do not skip `lastpc'? */
if (reg != NO_REG && pc < dest && dest <= lastpc)
pc += b; /* do the jump */
break; break;
} }
case OP_CALL: case OP_CALL:
case OP_TAILCALL: { case OP_TAILCALL: {
if (b != 0) { if (reg >= a) /* affect all registers above base */
checkreg(pt, a+b-1); setreg = filterpc(pc, jmptarget);
}
c--; /* c = num. returns */
if (c == LUA_MULTRET) {
check(checkopenop(pt, pc));
}
else if (c != 0)
checkreg(pt, a+c-1);
if (reg >= a) last = pc; /* affect all registers above base */
break; break;
} }
case OP_RETURN: { case OP_JMP: {
b--; /* b = num. returns */ int b = GETARG_sBx(i);
if (b > 0) checkreg(pt, a+b-1); int dest = pc + 1 + b;
break; /* jump is forward and do not skip `lastpc'? */
} if (pc < dest && dest <= lastpc) {
case OP_SETLIST: { if (dest > jmptarget)
if (b > 0) checkreg(pt, a + b); jmptarget = dest; /* update 'jmptarget' */
if (c == 0) {
pc++;
check(pc < pt->sizecode - 1);
} }
break; break;
} }
case OP_CLOSURE: { case OP_TEST: {
int nup, j; if (reg == a) /* jumped code can change 'a' */
check(b < pt->sizep); setreg = filterpc(pc, jmptarget);
nup = pt->p[b]->nups;
check(pc + nup < pt->sizecode);
for (j = 1; j <= nup; j++) {
OpCode op1 = GET_OPCODE(pt->code[pc + j]);
check(op1 == OP_GETUPVAL || op1 == OP_MOVE);
}
if (reg != NO_REG) /* tracing? */
pc += nup; /* do not 'execute' these pseudo-instructions */
break; break;
} }
case OP_VARARG: { default:
check((pt->is_vararg & VARARG_ISVARARG) && if (testAMode(op) && reg == a) /* any instruction that set A */
!(pt->is_vararg & VARARG_NEEDSARG)); setreg = filterpc(pc, jmptarget);
b--;
if (b == LUA_MULTRET) check(checkopenop(pt, pc));
checkreg(pt, a+b-1);
break; break;
}
default: break;
} }
} }
return pt->code[last]; return setreg;
}
#undef check
#undef checkjump
#undef checkreg
/* }====================================================== */
int luaG_checkcode (const Proto *pt) {
return (symbexec(pt, pt->sizecode, NO_REG) != 0);
} }
static const char *kname (Proto *p, int c) { static const char *getobjname (Proto *p, int lastpc, int reg,
if (ISK(c) && ttisstring(&p->k[INDEXK(c)]))
return svalue(&p->k[INDEXK(c)]);
else
return "?";
}
static const char *getobjname (lua_State *L, CallInfo *ci, int stackpos,
const char **name) { const char **name) {
if (isLua(ci)) { /* a Lua function? */ int pc;
Proto *p = ci_func(ci)->l.p; *name = luaF_getlocalname(p, reg + 1, lastpc);
int pc = currentpc(L, ci); if (*name) /* is a local? */
Instruction i; return "local";
*name = luaF_getlocalname(p, stackpos+1, pc); /* else try symbolic execution */
if (*name) /* is a local? */ pc = findsetreg(p, lastpc, reg);
return "local"; if (pc != -1) { /* could find instruction? */
i = symbexec(p, pc, stackpos); /* try symbolic execution */ Instruction i = p->code[pc];
lua_assert(pc != -1); OpCode op = GET_OPCODE(i);
switch (GET_OPCODE(i)) { switch (op) {
case OP_GETGLOBAL: {
int g = GETARG_Bx(i); /* global index */
lua_assert(ttisstring(&p->k[g]));
*name = svalue(&p->k[g]);
return "global";
}
case OP_MOVE: { case OP_MOVE: {
int a = GETARG_A(i); int b = GETARG_B(i); /* move from 'b' to 'a' */
int b = GETARG_B(i); /* move from `b' to `a' */ if (b < GETARG_A(i))
if (b < a) return getobjname(p, pc, b, name); /* get name for 'b' */
return getobjname(L, ci, b, name); /* get name for `b' */
break; break;
} }
case OP_GETTABUP:
case OP_GETTABLE: { case OP_GETTABLE: {
int k = GETARG_C(i); /* key index */ int k = GETARG_C(i); /* key index */
*name = kname(p, k); int t = GETARG_B(i); /* table index */
return "field"; const char *vn = (op == OP_GETTABLE) /* name of indexed variable */
? luaF_getlocalname(p, t + 1, pc)
: upvalname(p, t);
kname(p, pc, k, name);
return (vn && strcmp(vn, LUA_ENV) == 0) ? "global" : "field";
} }
case OP_GETUPVAL: { case OP_GETUPVAL: {
int u = GETARG_B(i); /* upvalue index */ *name = upvalname(p, GETARG_B(i));
*name = p->upvalues ? getstr(p->upvalues[u]) : "?";
return "upvalue"; return "upvalue";
} }
case OP_LOADK:
case OP_LOADKX: {
int b = (op == OP_LOADK) ? GETARG_Bx(i)
: GETARG_Ax(p->code[pc + 1]);
if (ttisstring(&p->k[b])) {
*name = svalue(&p->k[b]);
return "constant";
}
break;
}
case OP_SELF: { case OP_SELF: {
int k = GETARG_C(i); /* key index */ int k = GETARG_C(i); /* key index */
*name = kname(p, k); kname(p, pc, k, name);
return "method"; return "method";
} }
default: break; default: break; /* go through to return NULL */
} }
} }
return NULL; /* no useful name found */ return NULL; /* could not find reasonable name */
} }
static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) { static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) {
Instruction i; TMS tm;
if ((isLua(ci) && ci->tailcalls > 0) || !isLua(ci - 1)) Proto *p = ci_func(ci)->p; /* calling function */
return NULL; /* calling function is not Lua (or is unknown) */ int pc = currentpc(ci); /* calling instruction index */
ci--; /* calling function */ Instruction i = p->code[pc]; /* calling instruction */
i = ci_func(ci)->l.p->code[currentpc(L, ci)]; switch (GET_OPCODE(i)) {
if (GET_OPCODE(i) == OP_CALL || GET_OPCODE(i) == OP_TAILCALL || case OP_CALL:
GET_OPCODE(i) == OP_TFORLOOP) case OP_TAILCALL: /* get function name */
return getobjname(L, ci, GETARG_A(i), name); return getobjname(p, pc, GETARG_A(i), name);
else case OP_TFORCALL: { /* for iterator */
return NULL; /* no useful name can be found */ *name = "for iterator";
return "for iterator";
}
/* all other instructions can call only through metamethods */
case OP_SELF:
case OP_GETTABUP:
case OP_GETTABLE: tm = TM_INDEX; break;
case OP_SETTABUP:
case OP_SETTABLE: tm = TM_NEWINDEX; break;
case OP_EQ: tm = TM_EQ; break;
case OP_ADD: tm = TM_ADD; break;
case OP_SUB: tm = TM_SUB; break;
case OP_MUL: tm = TM_MUL; break;
case OP_DIV: tm = TM_DIV; break;
case OP_MOD: tm = TM_MOD; break;
case OP_POW: tm = TM_POW; break;
case OP_UNM: tm = TM_UNM; break;
case OP_LEN: tm = TM_LEN; break;
case OP_LT: tm = TM_LT; break;
case OP_LE: tm = TM_LE; break;
case OP_CONCAT: tm = TM_CONCAT; break;
default:
return NULL; /* else no useful name can be found */
}
*name = getstr(G(L)->tmname[tm]);
return "metamethod";
} }
/* }====================================================== */
/* only ANSI way to check whether a pointer points to an array */
/*
** only ANSI way to check whether a pointer points to an array
** (used only for error messages, so efficiency is not a big concern)
*/
static int isinstack (CallInfo *ci, const TValue *o) { static int isinstack (CallInfo *ci, const TValue *o) {
StkId p; StkId p;
for (p = ci->base; p < ci->top; p++) for (p = ci->u.l.base; p < ci->top; p++)
if (o == p) return 1; if (o == p) return 1;
return 0; return 0;
} }
void luaG_typeerror (lua_State *L, const TValue *o, const char *op) { static const char *getupvalname (CallInfo *ci, const TValue *o,
const char **name) {
LClosure *c = ci_func(ci);
int i;
for (i = 0; i < c->nupvalues; i++) {
if (c->upvals[i]->v == o) {
*name = upvalname(c->p, i);
return "upvalue";
}
}
return NULL;
}
l_noret luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
CallInfo *ci = L->ci;
const char *name = NULL; const char *name = NULL;
const char *t = luaT_typenames[ttype(o)]; const char *t = objtypename(o);
const char *kind = (isinstack(L->ci, o)) ? const char *kind = NULL;
getobjname(L, L->ci, cast_int(o - L->base), &name) : if (isLua(ci)) {
NULL; kind = getupvalname(ci, o, &name); /* check whether 'o' is an upvalue */
if (!kind && isinstack(ci, o)) /* no? try a register */
kind = getobjname(ci_func(ci)->p, currentpc(ci),
cast_int(o - ci->u.l.base), &name);
}
if (kind) if (kind)
luaG_runerror(L, "attempt to %s %s " LUA_QS " (a %s value)", luaG_runerror(L, "attempt to %s %s " LUA_QS " (a %s value)",
op, kind, name, t); op, kind, name, t);
@ -578,14 +529,14 @@ void luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
} }
void luaG_concaterror (lua_State *L, StkId p1, StkId p2) { l_noret luaG_concaterror (lua_State *L, StkId p1, StkId p2) {
if (ttisstring(p1) || ttisnumber(p1)) p1 = p2; if (ttisstring(p1) || ttisnumber(p1)) p1 = p2;
lua_assert(!ttisstring(p1) && !ttisnumber(p1)); lua_assert(!ttisstring(p1) && !ttisnumber(p1));
luaG_typeerror(L, p1, "concatenate"); luaG_typeerror(L, p1, "concatenate");
} }
void luaG_aritherror (lua_State *L, const TValue *p1, const TValue *p2) { l_noret luaG_aritherror (lua_State *L, const TValue *p1, const TValue *p2) {
TValue temp; TValue temp;
if (luaV_tonumber(p1, &temp) == NULL) if (luaV_tonumber(p1, &temp) == NULL)
p2 = p1; /* first operand is wrong */ p2 = p1; /* first operand is wrong */
@ -593,14 +544,13 @@ void luaG_aritherror (lua_State *L, const TValue *p1, const TValue *p2) {
} }
int luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) { l_noret luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) {
const char *t1 = luaT_typenames[ttype(p1)]; const char *t1 = objtypename(p1);
const char *t2 = luaT_typenames[ttype(p2)]; const char *t2 = objtypename(p2);
if (t1[2] == t2[2]) if (t1 == t2)
luaG_runerror(L, "attempt to compare two %s values", t1); luaG_runerror(L, "attempt to compare two %s values", t1);
else else
luaG_runerror(L, "attempt to compare %s with %s", t1, t2); luaG_runerror(L, "attempt to compare %s with %s", t1, t2);
return 0;
} }
@ -608,27 +558,32 @@ static void addinfo (lua_State *L, const char *msg) {
CallInfo *ci = L->ci; CallInfo *ci = L->ci;
if (isLua(ci)) { /* is Lua code? */ if (isLua(ci)) { /* is Lua code? */
char buff[LUA_IDSIZE]; /* add file:line information */ char buff[LUA_IDSIZE]; /* add file:line information */
int line = currentline(L, ci); int line = currentline(ci);
luaO_chunkid(buff, getstr(getluaproto(ci)->source), LUA_IDSIZE); TString *src = ci_func(ci)->p->source;
if (src)
luaO_chunkid(buff, getstr(src), LUA_IDSIZE);
else { /* no source available; use "?" instead */
buff[0] = '?'; buff[1] = '\0';
}
luaO_pushfstring(L, "%s:%d: %s", buff, line, msg); luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);
} }
} }
void luaG_errormsg (lua_State *L) { l_noret luaG_errormsg (lua_State *L) {
if (L->errfunc != 0) { /* is there an error handling function? */ if (L->errfunc != 0) { /* is there an error handling function? */
StkId errfunc = restorestack(L, L->errfunc); StkId errfunc = restorestack(L, L->errfunc);
if (!ttisfunction(errfunc)) luaD_throw(L, LUA_ERRERR); if (!ttisfunction(errfunc)) luaD_throw(L, LUA_ERRERR);
setobjs2s(L, L->top, L->top - 1); /* move argument */ setobjs2s(L, L->top, L->top - 1); /* move argument */
setobjs2s(L, L->top - 1, errfunc); /* push function */ setobjs2s(L, L->top - 1, errfunc); /* push function */
incr_top(L); L->top++;
luaD_call(L, L->top - 2, 1); /* call it */ luaD_call(L, L->top - 2, 1, 0); /* call it */
} }
luaD_throw(L, LUA_ERRRUN); luaD_throw(L, LUA_ERRRUN);
} }
void luaG_runerror (lua_State *L, const char *fmt, ...) { l_noret luaG_runerror (lua_State *L, const char *fmt, ...) {
va_list argp; va_list argp;
va_start(argp, fmt); va_start(argp, fmt);
addinfo(L, luaO_pushvfstring(L, fmt, argp)); addinfo(L, luaO_pushvfstring(L, fmt, argp));

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: ldebug.h,v 2.7.1.1 2013/04/12 18:48:47 roberto Exp $
** Auxiliary functions from Debug Interface module ** Auxiliary functions from Debug Interface module
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -13,21 +13,22 @@
#define pcRel(pc, p) (cast(int, (pc) - (p)->code) - 1) #define pcRel(pc, p) (cast(int, (pc) - (p)->code) - 1)
#define getline(f,pc) (((f)->lineinfo) ? (f)->lineinfo[pc] : 0) #define getfuncline(f,pc) (((f)->lineinfo) ? (f)->lineinfo[pc] : 0)
#define resethookcount(L) (L->hookcount = L->basehookcount) #define resethookcount(L) (L->hookcount = L->basehookcount)
/* Active Lua function (given call info) */
#define ci_func(ci) (clLvalue((ci)->func))
LUAI_FUNC void luaG_typeerror (lua_State *L, const TValue *o,
const char *opname); LUAI_FUNC l_noret luaG_typeerror (lua_State *L, const TValue *o,
LUAI_FUNC void luaG_concaterror (lua_State *L, StkId p1, StkId p2); const char *opname);
LUAI_FUNC void luaG_aritherror (lua_State *L, const TValue *p1, LUAI_FUNC l_noret luaG_concaterror (lua_State *L, StkId p1, StkId p2);
const TValue *p2); LUAI_FUNC l_noret luaG_aritherror (lua_State *L, const TValue *p1,
LUAI_FUNC int luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2);
const TValue *p2); LUAI_FUNC l_noret luaG_ordererror (lua_State *L, const TValue *p1,
LUAI_FUNC void luaG_runerror (lua_State *L, const char *fmt, ...); const TValue *p2);
LUAI_FUNC void luaG_errormsg (lua_State *L); LUAI_FUNC l_noret luaG_runerror (lua_State *L, const char *fmt, ...);
LUAI_FUNC int luaG_checkcode (const Proto *pt); LUAI_FUNC l_noret luaG_errormsg (lua_State *L);
LUAI_FUNC int luaG_checkopenop (Instruction i);
#endif #endif

View file

@ -1,11 +1,11 @@
/* /*
** $Id: ldo.c,v 2.38.1.3 2008/01/18 22:31:22 roberto Exp $ ** $Id: ldo.c,v 2.108.1.3 2013/11/08 18:22:50 roberto Exp $
** Stack and Call structure of Lua ** Stack and Call structure of Lua
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
/* #include <setjmp.h> */ #include <setjmp.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
@ -14,6 +14,7 @@
#include "lua.h" #include "lua.h"
#include "lapi.h"
#include "ldebug.h" #include "ldebug.h"
#include "ldo.h" #include "ldo.h"
#include "lfunc.h" #include "lfunc.h"
@ -39,6 +40,38 @@
** ======================================================= ** =======================================================
*/ */
/*
** LUAI_THROW/LUAI_TRY define how Lua does exception handling. By
** default, Lua handles errors with exceptions when compiling as
** C++ code, with _longjmp/_setjmp when asked to use them, and with
** longjmp/setjmp otherwise.
*/
#if !defined(LUAI_THROW)
#if defined(__cplusplus) && !defined(LUA_USE_LONGJMP)
/* C++ exceptions */
#define LUAI_THROW(L,c) throw(c)
#define LUAI_TRY(L,c,a) \
try { a } catch(...) { if ((c)->status == 0) (c)->status = -1; }
#define luai_jmpbuf int /* dummy variable */
#elif defined(LUA_USE_ULONGJMP)
/* in Unix, try _longjmp/_setjmp (more efficient) */
#define LUAI_THROW(L,c) _longjmp((c)->b, 1)
#define LUAI_TRY(L,c,a) if (_setjmp((c)->b) == 0) { a }
#define luai_jmpbuf jmp_buf
#else
/* default handling with long jumps */
#define LUAI_THROW(L,c) longjmp((c)->b, 1)
#define LUAI_TRY(L,c,a) if (setjmp((c)->b) == 0) { a }
#define luai_jmpbuf jmp_buf
#endif
#endif
/* chain list of long jump buffers */ /* chain list of long jump buffers */
struct lua_longjmp { struct lua_longjmp {
@ -48,18 +81,17 @@ struct lua_longjmp {
}; };
void luaD_seterrorobj (lua_State *L, int errcode, StkId oldtop) { static void seterrorobj (lua_State *L, int errcode, StkId oldtop) {
switch (errcode) { switch (errcode) {
case LUA_ERRMEM: { case LUA_ERRMEM: { /* memory error? */
setsvalue2s(L, oldtop, luaS_newliteral(L, MEMERRMSG)); setsvalue2s(L, oldtop, G(L)->memerrmsg); /* reuse preregistered msg. */
break; break;
} }
case LUA_ERRERR: { case LUA_ERRERR: {
setsvalue2s(L, oldtop, luaS_newliteral(L, "error in error handling")); setsvalue2s(L, oldtop, luaS_newliteral(L, "error in error handling"));
break; break;
} }
case LUA_ERRSYNTAX: default: {
case LUA_ERRRUN: {
setobjs2s(L, oldtop, L->top - 1); /* error message on current top */ setobjs2s(L, oldtop, L->top - 1); /* error message on current top */
break; break;
} }
@ -68,55 +100,39 @@ void luaD_seterrorobj (lua_State *L, int errcode, StkId oldtop) {
} }
static void restore_stack_limit (lua_State *L) { l_noret luaD_throw (lua_State *L, int errcode) {
lua_assert(L->stack_last - L->stack == L->stacksize - EXTRA_STACK - 1); if (L->errorJmp) { /* thread has an error handler? */
if (L->size_ci > LUAI_MAXCALLS) { /* there was an overflow? */ L->errorJmp->status = errcode; /* set status */
int inuse = cast_int(L->ci - L->base_ci); LUAI_THROW(L, L->errorJmp); /* jump to it */
if (inuse + 1 < LUAI_MAXCALLS) /* can `undo' overflow? */
luaD_reallocCI(L, LUAI_MAXCALLS);
} }
} else { /* thread has no error handler */
L->status = cast_byte(errcode); /* mark it as dead */
if (G(L)->mainthread->errorJmp) { /* main thread has a handler? */
static void resetstack (lua_State *L, int status) { setobjs2s(L, G(L)->mainthread->top++, L->top - 1); /* copy error obj. */
L->ci = L->base_ci; luaD_throw(G(L)->mainthread, errcode); /* re-throw in main thread */
L->base = L->ci->base; }
luaF_close(L, L->base); /* close eventual pending closures */ else { /* no handler at all; abort */
luaD_seterrorobj(L, status, L->base); if (G(L)->panic) { /* panic function? */
L->nCcalls = L->baseCcalls; lua_unlock(L);
L->allowhook = 1; G(L)->panic(L); /* call it (last chance to jump out) */
restore_stack_limit(L); }
L->errfunc = 0; abort();
L->errorJmp = NULL;
}
void luaD_throw (lua_State *L, int errcode) {
if (L->errorJmp) {
L->errorJmp->status = errcode;
LUAI_THROW(L, L->errorJmp);
}
else {
L->status = cast_byte(errcode);
if (G(L)->panic) {
resetstack(L, errcode);
lua_unlock(L);
G(L)->panic(L);
} }
exit(EXIT_FAILURE);
} }
} }
int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud) { int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud) {
unsigned short oldnCcalls = L->nCcalls;
struct lua_longjmp lj; struct lua_longjmp lj;
lj.status = 0; lj.status = LUA_OK;
lj.previous = L->errorJmp; /* chain new error handler */ lj.previous = L->errorJmp; /* chain new error handler */
L->errorJmp = &lj; L->errorJmp = &lj;
LUAI_TRY(L, &lj, LUAI_TRY(L, &lj,
(*f)(L, ud); (*f)(L, ud);
); );
L->errorJmp = lj.previous; /* restore old error handler */ L->errorJmp = lj.previous; /* restore old error handler */
L->nCcalls = oldnCcalls;
return lj.status; return lj.status;
} }
@ -129,112 +145,127 @@ static void correctstack (lua_State *L, TValue *oldstack) {
L->top = (L->top - oldstack) + L->stack; L->top = (L->top - oldstack) + L->stack;
for (up = L->openupval; up != NULL; up = up->gch.next) for (up = L->openupval; up != NULL; up = up->gch.next)
gco2uv(up)->v = (gco2uv(up)->v - oldstack) + L->stack; gco2uv(up)->v = (gco2uv(up)->v - oldstack) + L->stack;
for (ci = L->base_ci; ci <= L->ci; ci++) { for (ci = L->ci; ci != NULL; ci = ci->previous) {
ci->top = (ci->top - oldstack) + L->stack; ci->top = (ci->top - oldstack) + L->stack;
ci->base = (ci->base - oldstack) + L->stack;
ci->func = (ci->func - oldstack) + L->stack; ci->func = (ci->func - oldstack) + L->stack;
if (isLua(ci))
ci->u.l.base = (ci->u.l.base - oldstack) + L->stack;
} }
L->base = (L->base - oldstack) + L->stack;
} }
/* some space for error handling */
#define ERRORSTACKSIZE (LUAI_MAXSTACK + 200)
void luaD_reallocstack (lua_State *L, int newsize) { void luaD_reallocstack (lua_State *L, int newsize) {
TValue *oldstack = L->stack; TValue *oldstack = L->stack;
int realsize = newsize + 1 + EXTRA_STACK; int lim = L->stacksize;
lua_assert(L->stack_last - L->stack == L->stacksize - EXTRA_STACK - 1); lua_assert(newsize <= LUAI_MAXSTACK || newsize == ERRORSTACKSIZE);
luaM_reallocvector(L, L->stack, L->stacksize, realsize, TValue); lua_assert(L->stack_last - L->stack == L->stacksize - EXTRA_STACK);
L->stacksize = realsize; luaM_reallocvector(L, L->stack, L->stacksize, newsize, TValue);
L->stack_last = L->stack+newsize; for (; lim < newsize; lim++)
setnilvalue(L->stack + lim); /* erase new segment */
L->stacksize = newsize;
L->stack_last = L->stack + newsize - EXTRA_STACK;
correctstack(L, oldstack); correctstack(L, oldstack);
} }
void luaD_reallocCI (lua_State *L, int newsize) {
CallInfo *oldci = L->base_ci;
luaM_reallocvector(L, L->base_ci, L->size_ci, newsize, CallInfo);
L->size_ci = newsize;
L->ci = (L->ci - oldci) + L->base_ci;
L->end_ci = L->base_ci + L->size_ci - 1;
}
void luaD_growstack (lua_State *L, int n) { void luaD_growstack (lua_State *L, int n) {
if (n <= L->stacksize) /* double size is enough? */ int size = L->stacksize;
luaD_reallocstack(L, 2*L->stacksize); if (size > LUAI_MAXSTACK) /* error after extra size? */
else
luaD_reallocstack(L, L->stacksize + n);
}
static CallInfo *growCI (lua_State *L) {
if (L->size_ci > LUAI_MAXCALLS) /* overflow while handling overflow? */
luaD_throw(L, LUA_ERRERR); luaD_throw(L, LUA_ERRERR);
else { else {
luaD_reallocCI(L, 2*L->size_ci); int needed = cast_int(L->top - L->stack) + n + EXTRA_STACK;
if (L->size_ci > LUAI_MAXCALLS) int newsize = 2 * size;
if (newsize > LUAI_MAXSTACK) newsize = LUAI_MAXSTACK;
if (newsize < needed) newsize = needed;
if (newsize > LUAI_MAXSTACK) { /* stack overflow? */
luaD_reallocstack(L, ERRORSTACKSIZE);
luaG_runerror(L, "stack overflow"); luaG_runerror(L, "stack overflow");
}
else
luaD_reallocstack(L, newsize);
} }
return ++L->ci;
} }
void luaD_callhook (lua_State *L, int event, int line) { static int stackinuse (lua_State *L) {
CallInfo *ci;
StkId lim = L->top;
for (ci = L->ci; ci != NULL; ci = ci->previous) {
lua_assert(ci->top <= L->stack_last);
if (lim < ci->top) lim = ci->top;
}
return cast_int(lim - L->stack) + 1; /* part of stack in use */
}
void luaD_shrinkstack (lua_State *L) {
int inuse = stackinuse(L);
int goodsize = inuse + (inuse / 8) + 2*EXTRA_STACK;
if (goodsize > LUAI_MAXSTACK) goodsize = LUAI_MAXSTACK;
if (inuse > LUAI_MAXSTACK || /* handling stack overflow? */
goodsize >= L->stacksize) /* would grow instead of shrink? */
condmovestack(L); /* don't change stack (change only for debugging) */
else
luaD_reallocstack(L, goodsize); /* shrink it */
}
void luaD_hook (lua_State *L, int event, int line) {
lua_Hook hook = L->hook; lua_Hook hook = L->hook;
if (hook && L->allowhook) { if (hook && L->allowhook) {
CallInfo *ci = L->ci;
ptrdiff_t top = savestack(L, L->top); ptrdiff_t top = savestack(L, L->top);
ptrdiff_t ci_top = savestack(L, L->ci->top); ptrdiff_t ci_top = savestack(L, ci->top);
lua_Debug ar; lua_Debug ar;
ar.event = event; ar.event = event;
ar.currentline = line; ar.currentline = line;
if (event == LUA_HOOKTAILRET) ar.i_ci = ci;
ar.i_ci = 0; /* tail call; no debug information about it */
else
ar.i_ci = cast_int(L->ci - L->base_ci);
luaD_checkstack(L, LUA_MINSTACK); /* ensure minimum stack size */ luaD_checkstack(L, LUA_MINSTACK); /* ensure minimum stack size */
L->ci->top = L->top + LUA_MINSTACK; ci->top = L->top + LUA_MINSTACK;
lua_assert(L->ci->top <= L->stack_last); lua_assert(ci->top <= L->stack_last);
L->allowhook = 0; /* cannot call hooks inside a hook */ L->allowhook = 0; /* cannot call hooks inside a hook */
ci->callstatus |= CIST_HOOKED;
lua_unlock(L); lua_unlock(L);
(*hook)(L, &ar); (*hook)(L, &ar);
lua_lock(L); lua_lock(L);
lua_assert(!L->allowhook); lua_assert(!L->allowhook);
L->allowhook = 1; L->allowhook = 1;
L->ci->top = restorestack(L, ci_top); ci->top = restorestack(L, ci_top);
L->top = restorestack(L, top); L->top = restorestack(L, top);
ci->callstatus &= ~CIST_HOOKED;
} }
} }
static void callhook (lua_State *L, CallInfo *ci) {
int hook = LUA_HOOKCALL;
ci->u.l.savedpc++; /* hooks assume 'pc' is already incremented */
if (isLua(ci->previous) &&
GET_OPCODE(*(ci->previous->u.l.savedpc - 1)) == OP_TAILCALL) {
ci->callstatus |= CIST_TAIL;
hook = LUA_HOOKTAILCALL;
}
luaD_hook(L, hook, -1);
ci->u.l.savedpc--; /* correct 'pc' */
}
static StkId adjust_varargs (lua_State *L, Proto *p, int actual) { static StkId adjust_varargs (lua_State *L, Proto *p, int actual) {
int i; int i;
int nfixargs = p->numparams; int nfixargs = p->numparams;
Table *htab = NULL;
StkId base, fixed; StkId base, fixed;
for (; actual < nfixargs; ++actual) lua_assert(actual >= nfixargs);
setnilvalue(L->top++);
#if defined(LUA_COMPAT_VARARG)
if (p->is_vararg & VARARG_NEEDSARG) { /* compat. with old-style vararg? */
int nvar = actual - nfixargs; /* number of extra arguments */
lua_assert(p->is_vararg & VARARG_HASARG);
luaC_checkGC(L);
htab = luaH_new(L, nvar, 1); /* create `arg' table */
for (i=0; i<nvar; i++) /* put extra arguments into `arg' table */
setobj2n(L, luaH_setnum(L, htab, i+1), L->top - nvar + i);
/* store counter in field `n' */
setnvalue(luaH_setstr(L, htab, luaS_newliteral(L, "n")), cast_num(nvar));
}
#endif
/* move fixed parameters to final position */ /* move fixed parameters to final position */
luaD_checkstack(L, p->maxstacksize); /* check again for new 'base' */
fixed = L->top - actual; /* first fixed argument */ fixed = L->top - actual; /* first fixed argument */
base = L->top; /* final position of first argument */ base = L->top; /* final position of first argument */
for (i=0; i<nfixargs; i++) { for (i=0; i<nfixargs; i++) {
setobjs2s(L, L->top++, fixed+i); setobjs2s(L, L->top++, fixed + i);
setnilvalue(fixed+i); setnilvalue(fixed + i);
}
/* add `arg' parameter */
if (htab) {
sethvalue(L, L->top++, htab);
lua_assert(iswhite(obj2gco(htab)));
} }
return base; return base;
} }
@ -256,100 +287,93 @@ static StkId tryfuncTM (lua_State *L, StkId func) {
#define inc_ci(L) \ #define next_ci(L) (L->ci = (L->ci->next ? L->ci->next : luaE_extendCI(L)))
((L->ci == L->end_ci) ? growCI(L) : \
(condhardstacktests(luaD_reallocCI(L, L->size_ci)), ++L->ci))
/*
** returns true if function has been executed (C function)
*/
int luaD_precall (lua_State *L, StkId func, int nresults) { int luaD_precall (lua_State *L, StkId func, int nresults) {
LClosure *cl; lua_CFunction f;
ptrdiff_t funcr; CallInfo *ci;
if (!ttisfunction(func)) /* `func' is not a function? */ int n; /* number of arguments (Lua) or returns (C) */
func = tryfuncTM(L, func); /* check the `function' tag method */ ptrdiff_t funcr = savestack(L, func);
funcr = savestack(L, func); switch (ttype(func)) {
cl = &clvalue(func)->l; case LUA_TLCF: /* light C function */
L->ci->savedpc = L->savedpc; f = fvalue(func);
if (!cl->isC) { /* Lua function? prepare its call */ goto Cfunc;
CallInfo *ci; case LUA_TCCL: { /* C closure */
StkId st, base; f = clCvalue(func)->f;
Proto *p = cl->p; Cfunc:
luaD_checkstack(L, p->maxstacksize); luaD_checkstack(L, LUA_MINSTACK); /* ensure minimum stack size */
func = restorestack(L, funcr); ci = next_ci(L); /* now 'enter' new function */
if (!p->is_vararg) { /* no varargs? */ ci->nresults = nresults;
base = func + 1; ci->func = restorestack(L, funcr);
if (L->top > base + p->numparams) ci->top = L->top + LUA_MINSTACK;
L->top = base + p->numparams; lua_assert(ci->top <= L->stack_last);
} ci->callstatus = 0;
else { /* vararg function */ luaC_checkGC(L); /* stack grow uses memory */
int nargs = cast_int(L->top - func) - 1; if (L->hookmask & LUA_MASKCALL)
base = adjust_varargs(L, p, nargs); luaD_hook(L, LUA_HOOKCALL, -1);
func = restorestack(L, funcr); /* previous call may change the stack */ lua_unlock(L);
} n = (*f)(L); /* do the actual call */
ci = inc_ci(L); /* now `enter' new function */ lua_lock(L);
ci->func = func; api_checknelems(L, n);
L->base = ci->base = base;
ci->top = L->base + p->maxstacksize;
lua_assert(ci->top <= L->stack_last);
L->savedpc = p->code; /* starting point */
ci->tailcalls = 0;
ci->nresults = nresults;
for (st = L->top; st < ci->top; st++)
setnilvalue(st);
L->top = ci->top;
if (L->hookmask & LUA_MASKCALL) {
L->savedpc++; /* hooks assume 'pc' is already incremented */
luaD_callhook(L, LUA_HOOKCALL, -1);
L->savedpc--; /* correct 'pc' */
}
return PCRLUA;
}
else { /* if is a C function, call it */
CallInfo *ci;
int n;
luaD_checkstack(L, LUA_MINSTACK); /* ensure minimum stack size */
ci = inc_ci(L); /* now `enter' new function */
ci->func = restorestack(L, funcr);
L->base = ci->base = ci->func + 1;
ci->top = L->top + LUA_MINSTACK;
lua_assert(ci->top <= L->stack_last);
ci->nresults = nresults;
if (L->hookmask & LUA_MASKCALL)
luaD_callhook(L, LUA_HOOKCALL, -1);
lua_unlock(L);
n = (*curr_func(L)->c.f)(L); /* do the actual call */
lua_lock(L);
if (n < 0) /* yielding? */
return PCRYIELD;
else {
luaD_poscall(L, L->top - n); luaD_poscall(L, L->top - n);
return PCRC; return 1;
}
case LUA_TLCL: { /* Lua function: prepare its call */
StkId base;
Proto *p = clLvalue(func)->p;
n = cast_int(L->top - func) - 1; /* number of real arguments */
luaD_checkstack(L, p->maxstacksize);
for (; n < p->numparams; n++)
setnilvalue(L->top++); /* complete missing arguments */
if (!p->is_vararg) {
func = restorestack(L, funcr);
base = func + 1;
}
else {
base = adjust_varargs(L, p, n);
func = restorestack(L, funcr); /* previous call can change stack */
}
ci = next_ci(L); /* now 'enter' new function */
ci->nresults = nresults;
ci->func = func;
ci->u.l.base = base;
ci->top = base + p->maxstacksize;
lua_assert(ci->top <= L->stack_last);
ci->u.l.savedpc = p->code; /* starting point */
ci->callstatus = CIST_LUA;
L->top = ci->top;
luaC_checkGC(L); /* stack grow uses memory */
if (L->hookmask & LUA_MASKCALL)
callhook(L, ci);
return 0;
}
default: { /* not a function */
func = tryfuncTM(L, func); /* retry with 'function' tag method */
return luaD_precall(L, func, nresults); /* now it must be a function */
} }
} }
} }
static StkId callrethooks (lua_State *L, StkId firstResult) {
ptrdiff_t fr = savestack(L, firstResult); /* next call may change stack */
luaD_callhook(L, LUA_HOOKRET, -1);
if (f_isLua(L->ci)) { /* Lua function? */
while ((L->hookmask & LUA_MASKRET) && L->ci->tailcalls--) /* tail calls */
luaD_callhook(L, LUA_HOOKTAILRET, -1);
}
return restorestack(L, fr);
}
int luaD_poscall (lua_State *L, StkId firstResult) { int luaD_poscall (lua_State *L, StkId firstResult) {
StkId res; StkId res;
int wanted, i; int wanted, i;
CallInfo *ci; CallInfo *ci = L->ci;
if (L->hookmask & LUA_MASKRET) if (L->hookmask & (LUA_MASKRET | LUA_MASKLINE)) {
firstResult = callrethooks(L, firstResult); if (L->hookmask & LUA_MASKRET) {
ci = L->ci--; ptrdiff_t fr = savestack(L, firstResult); /* hook may change stack */
luaD_hook(L, LUA_HOOKRET, -1);
firstResult = restorestack(L, fr);
}
L->oldpc = ci->previous->u.l.savedpc; /* 'oldpc' for caller function */
}
res = ci->func; /* res == final position of 1st result */ res = ci->func; /* res == final position of 1st result */
wanted = ci->nresults; wanted = ci->nresults;
L->base = (ci - 1)->base; /* restore base */ L->ci = ci = ci->previous; /* back to caller */
L->savedpc = (ci - 1)->savedpc; /* restore savedpc */
/* move results to correct place */ /* move results to correct place */
for (i = wanted; i != 0 && firstResult < L->top; i--) for (i = wanted; i != 0 && firstResult < L->top; i--)
setobjs2s(L, res++, firstResult++); setobjs2s(L, res++, firstResult++);
@ -365,112 +389,226 @@ int luaD_poscall (lua_State *L, StkId firstResult) {
** The arguments are on the stack, right after the function. ** The arguments are on the stack, right after the function.
** When returns, all the results are on the stack, starting at the original ** When returns, all the results are on the stack, starting at the original
** function position. ** function position.
*/ */
void luaD_call (lua_State *L, StkId func, int nResults) { void luaD_call (lua_State *L, StkId func, int nResults, int allowyield) {
if (++L->nCcalls >= LUAI_MAXCCALLS) { if (++L->nCcalls >= LUAI_MAXCCALLS) {
if (L->nCcalls == LUAI_MAXCCALLS) if (L->nCcalls == LUAI_MAXCCALLS)
luaG_runerror(L, "C stack overflow"); luaG_runerror(L, "C stack overflow");
else if (L->nCcalls >= (LUAI_MAXCCALLS + (LUAI_MAXCCALLS>>3))) else if (L->nCcalls >= (LUAI_MAXCCALLS + (LUAI_MAXCCALLS>>3)))
luaD_throw(L, LUA_ERRERR); /* error while handing stack error */ luaD_throw(L, LUA_ERRERR); /* error while handing stack error */
} }
if (luaD_precall(L, func, nResults) == PCRLUA) /* is a Lua function? */ if (!allowyield) L->nny++;
luaV_execute(L, 1); /* call it */ if (!luaD_precall(L, func, nResults)) /* is a Lua function? */
luaV_execute(L); /* call it */
if (!allowyield) L->nny--;
L->nCcalls--; L->nCcalls--;
luaC_checkGC(L);
} }
static void finishCcall (lua_State *L) {
CallInfo *ci = L->ci;
int n;
lua_assert(ci->u.c.k != NULL); /* must have a continuation */
lua_assert(L->nny == 0);
if (ci->callstatus & CIST_YPCALL) { /* was inside a pcall? */
ci->callstatus &= ~CIST_YPCALL; /* finish 'lua_pcall' */
L->errfunc = ci->u.c.old_errfunc;
}
/* finish 'lua_callk'/'lua_pcall' */
adjustresults(L, ci->nresults);
/* call continuation function */
if (!(ci->callstatus & CIST_STAT)) /* no call status? */
ci->u.c.status = LUA_YIELD; /* 'default' status */
lua_assert(ci->u.c.status != LUA_OK);
ci->callstatus = (ci->callstatus & ~(CIST_YPCALL | CIST_STAT)) | CIST_YIELDED;
lua_unlock(L);
n = (*ci->u.c.k)(L);
lua_lock(L);
api_checknelems(L, n);
/* finish 'luaD_precall' */
luaD_poscall(L, L->top - n);
}
static void unroll (lua_State *L, void *ud) {
UNUSED(ud);
for (;;) {
if (L->ci == &L->base_ci) /* stack is empty? */
return; /* coroutine finished normally */
if (!isLua(L->ci)) /* C function? */
finishCcall(L);
else { /* Lua function */
luaV_finishOp(L); /* finish interrupted instruction */
luaV_execute(L); /* execute down to higher C 'boundary' */
}
}
}
/*
** check whether thread has a suspended protected call
*/
static CallInfo *findpcall (lua_State *L) {
CallInfo *ci;
for (ci = L->ci; ci != NULL; ci = ci->previous) { /* search for a pcall */
if (ci->callstatus & CIST_YPCALL)
return ci;
}
return NULL; /* no pending pcall */
}
static int recover (lua_State *L, int status) {
StkId oldtop;
CallInfo *ci = findpcall(L);
if (ci == NULL) return 0; /* no recovery point */
/* "finish" luaD_pcall */
oldtop = restorestack(L, ci->extra);
luaF_close(L, oldtop);
seterrorobj(L, status, oldtop);
L->ci = ci;
L->allowhook = ci->u.c.old_allowhook;
L->nny = 0; /* should be zero to be yieldable */
luaD_shrinkstack(L);
L->errfunc = ci->u.c.old_errfunc;
ci->callstatus |= CIST_STAT; /* call has error status */
ci->u.c.status = status; /* (here it is) */
return 1; /* continue running the coroutine */
}
/*
** signal an error in the call to 'resume', not in the execution of the
** coroutine itself. (Such errors should not be handled by any coroutine
** error handler and should not kill the coroutine.)
*/
static l_noret resume_error (lua_State *L, const char *msg, StkId firstArg) {
L->top = firstArg; /* remove args from the stack */
setsvalue2s(L, L->top, luaS_new(L, msg)); /* push error message */
api_incr_top(L);
luaD_throw(L, -1); /* jump back to 'lua_resume' */
}
/*
** do the work for 'lua_resume' in protected mode
*/
static void resume (lua_State *L, void *ud) { static void resume (lua_State *L, void *ud) {
int nCcalls = L->nCcalls;
StkId firstArg = cast(StkId, ud); StkId firstArg = cast(StkId, ud);
CallInfo *ci = L->ci; CallInfo *ci = L->ci;
if (L->status == 0) { /* start coroutine? */ if (nCcalls >= LUAI_MAXCCALLS)
lua_assert(ci == L->base_ci && firstArg > L->base); resume_error(L, "C stack overflow", firstArg);
if (luaD_precall(L, firstArg - 1, LUA_MULTRET) != PCRLUA) if (L->status == LUA_OK) { /* may be starting a coroutine */
return; if (ci != &L->base_ci) /* not in base level? */
resume_error(L, "cannot resume non-suspended coroutine", firstArg);
/* coroutine is in base level; start running it */
if (!luaD_precall(L, firstArg - 1, LUA_MULTRET)) /* Lua function? */
luaV_execute(L); /* call it */
} }
else if (L->status != LUA_YIELD)
resume_error(L, "cannot resume dead coroutine", firstArg);
else { /* resuming from previous yield */ else { /* resuming from previous yield */
lua_assert(L->status == LUA_YIELD); L->status = LUA_OK;
L->status = 0; ci->func = restorestack(L, ci->extra);
if (!f_isLua(ci)) { /* `common' yield? */ if (isLua(ci)) /* yielded inside a hook? */
/* finish interrupted execution of `OP_CALL' */ luaV_execute(L); /* just continue running Lua code */
lua_assert(GET_OPCODE(*((ci-1)->savedpc - 1)) == OP_CALL || else { /* 'common' yield */
GET_OPCODE(*((ci-1)->savedpc - 1)) == OP_TAILCALL); if (ci->u.c.k != NULL) { /* does it have a continuation? */
if (luaD_poscall(L, firstArg)) /* complete it... */ int n;
L->top = L->ci->top; /* and correct top if not multiple results */ ci->u.c.status = LUA_YIELD; /* 'default' status */
ci->callstatus |= CIST_YIELDED;
lua_unlock(L);
n = (*ci->u.c.k)(L); /* call continuation */
lua_lock(L);
api_checknelems(L, n);
firstArg = L->top - n; /* yield results come from continuation */
}
luaD_poscall(L, firstArg); /* finish 'luaD_precall' */
} }
else /* yielded inside a hook: just continue its execution */ unroll(L, NULL);
L->base = L->ci->base;
} }
luaV_execute(L, cast_int(L->ci - L->base_ci)); lua_assert(nCcalls == L->nCcalls);
} }
static int resume_error (lua_State *L, const char *msg) { LUA_API int lua_resume (lua_State *L, lua_State *from, int nargs) {
L->top = L->ci->base;
setsvalue2s(L, L->top, luaS_new(L, msg));
incr_top(L);
lua_unlock(L);
return LUA_ERRRUN;
}
LUA_API int lua_resume (lua_State *L, int nargs) {
int status; int status;
int oldnny = L->nny; /* save 'nny' */
lua_lock(L); lua_lock(L);
if (L->status != LUA_YIELD && (L->status != 0 || L->ci != L->base_ci))
return resume_error(L, "cannot resume non-suspended coroutine");
if (L->nCcalls >= LUAI_MAXCCALLS)
return resume_error(L, "C stack overflow");
luai_userstateresume(L, nargs); luai_userstateresume(L, nargs);
lua_assert(L->errfunc == 0); L->nCcalls = (from) ? from->nCcalls + 1 : 1;
L->baseCcalls = ++L->nCcalls; L->nny = 0; /* allow yields */
api_checknelems(L, (L->status == LUA_OK) ? nargs + 1 : nargs);
status = luaD_rawrunprotected(L, resume, L->top - nargs); status = luaD_rawrunprotected(L, resume, L->top - nargs);
if (status != 0) { /* error? */ if (status == -1) /* error calling 'lua_resume'? */
L->status = cast_byte(status); /* mark thread as `dead' */ status = LUA_ERRRUN;
luaD_seterrorobj(L, status, L->top); else { /* yield or regular error */
L->ci->top = L->top; while (status != LUA_OK && status != LUA_YIELD) { /* error? */
if (recover(L, status)) /* recover point? */
status = luaD_rawrunprotected(L, unroll, NULL); /* run continuation */
else { /* unrecoverable error */
L->status = cast_byte(status); /* mark thread as `dead' */
seterrorobj(L, status, L->top);
L->ci->top = L->top;
break;
}
}
lua_assert(status == L->status);
} }
else { L->nny = oldnny; /* restore 'nny' */
lua_assert(L->nCcalls == L->baseCcalls); L->nCcalls--;
status = L->status; lua_assert(L->nCcalls == ((from) ? from->nCcalls : 0));
}
--L->nCcalls;
lua_unlock(L); lua_unlock(L);
return status; return status;
} }
LUA_API int lua_yield (lua_State *L, int nresults) { LUA_API int lua_yieldk (lua_State *L, int nresults, int ctx, lua_CFunction k) {
CallInfo *ci = L->ci;
luai_userstateyield(L, nresults); luai_userstateyield(L, nresults);
lua_lock(L); lua_lock(L);
if (L->nCcalls > L->baseCcalls) api_checknelems(L, nresults);
luaG_runerror(L, "attempt to yield across metamethod/C-call boundary"); if (L->nny > 0) {
L->base = L->top - nresults; /* protect stack slots below */ if (L != G(L)->mainthread)
luaG_runerror(L, "attempt to yield across a C-call boundary");
else
luaG_runerror(L, "attempt to yield from outside a coroutine");
}
L->status = LUA_YIELD; L->status = LUA_YIELD;
ci->extra = savestack(L, ci->func); /* save current 'func' */
if (isLua(ci)) { /* inside a hook? */
api_check(L, k == NULL, "hooks cannot continue after yielding");
}
else {
if ((ci->u.c.k = k) != NULL) /* is there a continuation? */
ci->u.c.ctx = ctx; /* save context */
ci->func = L->top - nresults - 1; /* protect stack below results */
luaD_throw(L, LUA_YIELD);
}
lua_assert(ci->callstatus & CIST_HOOKED); /* must be inside a hook */
lua_unlock(L); lua_unlock(L);
return -1; return 0; /* return to 'luaD_hook' */
} }
int luaD_pcall (lua_State *L, Pfunc func, void *u, int luaD_pcall (lua_State *L, Pfunc func, void *u,
ptrdiff_t old_top, ptrdiff_t ef) { ptrdiff_t old_top, ptrdiff_t ef) {
int status; int status;
unsigned short oldnCcalls = L->nCcalls; CallInfo *old_ci = L->ci;
ptrdiff_t old_ci = saveci(L, L->ci);
lu_byte old_allowhooks = L->allowhook; lu_byte old_allowhooks = L->allowhook;
unsigned short old_nny = L->nny;
ptrdiff_t old_errfunc = L->errfunc; ptrdiff_t old_errfunc = L->errfunc;
L->errfunc = ef; L->errfunc = ef;
status = luaD_rawrunprotected(L, func, u); status = luaD_rawrunprotected(L, func, u);
if (status != 0) { /* an error occurred? */ if (status != LUA_OK) { /* an error occurred? */
StkId oldtop = restorestack(L, old_top); StkId oldtop = restorestack(L, old_top);
luaF_close(L, oldtop); /* close eventual pending closures */ luaF_close(L, oldtop); /* close possible pending closures */
luaD_seterrorobj(L, status, oldtop); seterrorobj(L, status, oldtop);
L->nCcalls = oldnCcalls; L->ci = old_ci;
L->ci = restoreci(L, old_ci);
L->base = L->ci->base;
L->savedpc = L->ci->savedpc;
L->allowhook = old_allowhooks; L->allowhook = old_allowhooks;
restore_stack_limit(L); L->nny = old_nny;
luaD_shrinkstack(L);
} }
L->errfunc = old_errfunc; L->errfunc = old_errfunc;
return status; return status;
@ -483,35 +621,60 @@ int luaD_pcall (lua_State *L, Pfunc func, void *u,
*/ */
struct SParser { /* data to `f_parser' */ struct SParser { /* data to `f_parser' */
ZIO *z; ZIO *z;
Mbuffer buff; /* buffer to be used by the scanner */ Mbuffer buff; /* dynamic structure used by the scanner */
Dyndata dyd; /* dynamic structures used by the parser */
const char *mode;
const char *name; const char *name;
}; };
static void f_parser (lua_State *L, void *ud) {
int i; static void checkmode (lua_State *L, const char *mode, const char *x) {
Proto *tf; if (mode && strchr(mode, x[0]) == NULL) {
Closure *cl; luaO_pushfstring(L,
struct SParser *p = cast(struct SParser *, ud); "attempt to load a %s chunk (mode is " LUA_QS ")", x, mode);
int c = luaZ_lookahead(p->z); luaD_throw(L, LUA_ERRSYNTAX);
luaC_checkGC(L); }
tf = ((c == LUA_SIGNATURE[0]) ? luaU_undump : luaY_parser)(L, p->z,
&p->buff, p->name);
cl = luaF_newLclosure(L, tf->nups, hvalue(gt(L)));
cl->l.p = tf;
for (i = 0; i < tf->nups; i++) /* initialize eventual upvalues */
cl->l.upvals[i] = luaF_newupval(L);
setclvalue(L, L->top, cl);
incr_top(L);
} }
int luaD_protectedparser (lua_State *L, ZIO *z, const char *name) { static void f_parser (lua_State *L, void *ud) {
int i;
Closure *cl;
struct SParser *p = cast(struct SParser *, ud);
int c = zgetc(p->z); /* read first character */
if (c == LUA_SIGNATURE[0]) {
checkmode(L, p->mode, "binary");
cl = luaU_undump(L, p->z, &p->buff, p->name);
}
else {
checkmode(L, p->mode, "text");
cl = luaY_parser(L, p->z, &p->buff, &p->dyd, p->name, c);
}
lua_assert(cl->l.nupvalues == cl->l.p->sizeupvalues);
for (i = 0; i < cl->l.nupvalues; i++) { /* initialize upvalues */
UpVal *up = luaF_newupval(L);
cl->l.upvals[i] = up;
luaC_objbarrier(L, cl, up);
}
}
int luaD_protectedparser (lua_State *L, ZIO *z, const char *name,
const char *mode) {
struct SParser p; struct SParser p;
int status; int status;
p.z = z; p.name = name; L->nny++; /* cannot yield during parsing */
p.z = z; p.name = name; p.mode = mode;
p.dyd.actvar.arr = NULL; p.dyd.actvar.size = 0;
p.dyd.gt.arr = NULL; p.dyd.gt.size = 0;
p.dyd.label.arr = NULL; p.dyd.label.size = 0;
luaZ_initbuffer(L, &p.buff); luaZ_initbuffer(L, &p.buff);
status = luaD_pcall(L, f_parser, &p, savestack(L, L->top), L->errfunc); status = luaD_pcall(L, f_parser, &p, savestack(L, L->top), L->errfunc);
luaZ_freebuffer(L, &p.buff); luaZ_freebuffer(L, &p.buff);
luaM_freearray(L, p.dyd.actvar.arr, p.dyd.actvar.size);
luaM_freearray(L, p.dyd.gt.arr, p.dyd.gt.size);
luaM_freearray(L, p.dyd.label.arr, p.dyd.label.size);
L->nny--;
return status; return status;
} }

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: ldo.h,v 2.20.1.1 2013/04/12 18:48:47 roberto Exp $
** Stack and Call structure of Lua ** Stack and Call structure of Lua
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -13,45 +13,34 @@
#include "lzio.h" #include "lzio.h"
#define luaD_checkstack(L,n) \ #define luaD_checkstack(L,n) if (L->stack_last - L->top <= (n)) \
if ((char *)L->stack_last - (char *)L->top <= (n)*(int)sizeof(TValue)) \ luaD_growstack(L, n); else condmovestack(L);
luaD_growstack(L, n); \
else condhardstacktests(luaD_reallocstack(L, L->stacksize - EXTRA_STACK - 1));
#define incr_top(L) {luaD_checkstack(L,1); L->top++;} #define incr_top(L) {L->top++; luaD_checkstack(L,0);}
#define savestack(L,p) ((char *)(p) - (char *)L->stack) #define savestack(L,p) ((char *)(p) - (char *)L->stack)
#define restorestack(L,n) ((TValue *)((char *)L->stack + (n))) #define restorestack(L,n) ((TValue *)((char *)L->stack + (n)))
#define saveci(L,p) ((char *)(p) - (char *)L->base_ci)
#define restoreci(L,n) ((CallInfo *)((char *)L->base_ci + (n)))
/* results from luaD_precall */
#define PCRLUA 0 /* initiated a call to a Lua function */
#define PCRC 1 /* did a call to a C function */
#define PCRYIELD 2 /* C funtion yielded */
/* type of protected functions, to be ran by `runprotected' */ /* type of protected functions, to be ran by `runprotected' */
typedef void (*Pfunc) (lua_State *L, void *ud); typedef void (*Pfunc) (lua_State *L, void *ud);
LUAI_FUNC int luaD_protectedparser (lua_State *L, ZIO *z, const char *name); LUAI_FUNC int luaD_protectedparser (lua_State *L, ZIO *z, const char *name,
LUAI_FUNC void luaD_callhook (lua_State *L, int event, int line); const char *mode);
LUAI_FUNC void luaD_hook (lua_State *L, int event, int line);
LUAI_FUNC int luaD_precall (lua_State *L, StkId func, int nresults); LUAI_FUNC int luaD_precall (lua_State *L, StkId func, int nresults);
LUAI_FUNC void luaD_call (lua_State *L, StkId func, int nResults); LUAI_FUNC void luaD_call (lua_State *L, StkId func, int nResults,
int allowyield);
LUAI_FUNC int luaD_pcall (lua_State *L, Pfunc func, void *u, LUAI_FUNC int luaD_pcall (lua_State *L, Pfunc func, void *u,
ptrdiff_t oldtop, ptrdiff_t ef); ptrdiff_t oldtop, ptrdiff_t ef);
LUAI_FUNC int luaD_poscall (lua_State *L, StkId firstResult); LUAI_FUNC int luaD_poscall (lua_State *L, StkId firstResult);
LUAI_FUNC void luaD_reallocCI (lua_State *L, int newsize);
LUAI_FUNC void luaD_reallocstack (lua_State *L, int newsize); LUAI_FUNC void luaD_reallocstack (lua_State *L, int newsize);
LUAI_FUNC void luaD_growstack (lua_State *L, int n); LUAI_FUNC void luaD_growstack (lua_State *L, int n);
LUAI_FUNC void luaD_shrinkstack (lua_State *L);
LUAI_FUNC void luaD_throw (lua_State *L, int errcode); LUAI_FUNC l_noret luaD_throw (lua_State *L, int errcode);
LUAI_FUNC int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud); LUAI_FUNC int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud);
LUAI_FUNC void luaD_seterrorobj (lua_State *L, int errcode, StkId oldtop);
#endif #endif

View file

@ -1,5 +1,5 @@
/* /*
** $Id: ldump.c,v 2.8.1.1 2007/12/27 13:02:25 roberto Exp $ ** $Id: ldump.c,v 2.17.1.1 2013/04/12 18:48:47 roberto Exp $
** save precompiled Lua chunks ** save precompiled Lua chunks
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -24,7 +24,7 @@ typedef struct {
} DumpState; } DumpState;
#define DumpMem(b,n,size,D) DumpBlock(b,(n)*(size),D) #define DumpMem(b,n,size,D) DumpBlock(b,(n)*(size),D)
#define DumpVar(x,D) DumpMem(&x,1,sizeof(x),D) #define DumpVar(x,D) DumpMem(&x,1,sizeof(x),D)
static void DumpBlock(const void* b, size_t size, DumpState* D) static void DumpBlock(const void* b, size_t size, DumpState* D)
{ {
@ -60,7 +60,7 @@ static void DumpVector(const void* b, int n, size_t size, DumpState* D)
static void DumpString(const TString* s, DumpState* D) static void DumpString(const TString* s, DumpState* D)
{ {
if (s==NULL || getstr(s)==NULL) if (s==NULL)
{ {
size_t size=0; size_t size=0;
DumpVar(size,D); DumpVar(size,D);
@ -69,13 +69,13 @@ static void DumpString(const TString* s, DumpState* D)
{ {
size_t size=s->tsv.len+1; /* include trailing '\0' */ size_t size=s->tsv.len+1; /* include trailing '\0' */
DumpVar(size,D); DumpVar(size,D);
DumpBlock(getstr(s),size,D); DumpBlock(getstr(s),size*sizeof(char),D);
} }
} }
#define DumpCode(f,D) DumpVector(f->code,f->sizecode,sizeof(Instruction),D) #define DumpCode(f,D) DumpVector(f->code,f->sizecode,sizeof(Instruction),D)
static void DumpFunction(const Proto* f, const TString* p, DumpState* D); static void DumpFunction(const Proto* f, DumpState* D);
static void DumpConstants(const Proto* f, DumpState* D) static void DumpConstants(const Proto* f, DumpState* D)
{ {
@ -84,8 +84,8 @@ static void DumpConstants(const Proto* f, DumpState* D)
for (i=0; i<n; i++) for (i=0; i<n; i++)
{ {
const TValue* o=&f->k[i]; const TValue* o=&f->k[i];
DumpChar(ttype(o),D); DumpChar(ttypenv(o),D);
switch (ttype(o)) switch (ttypenv(o))
{ {
case LUA_TNIL: case LUA_TNIL:
break; break;
@ -98,19 +98,29 @@ static void DumpConstants(const Proto* f, DumpState* D)
case LUA_TSTRING: case LUA_TSTRING:
DumpString(rawtsvalue(o),D); DumpString(rawtsvalue(o),D);
break; break;
default: default: lua_assert(0);
lua_assert(0); /* cannot happen */
break;
} }
} }
n=f->sizep; n=f->sizep;
DumpInt(n,D); DumpInt(n,D);
for (i=0; i<n; i++) DumpFunction(f->p[i],f->source,D); for (i=0; i<n; i++) DumpFunction(f->p[i],D);
}
static void DumpUpvalues(const Proto* f, DumpState* D)
{
int i,n=f->sizeupvalues;
DumpInt(n,D);
for (i=0; i<n; i++)
{
DumpChar(f->upvalues[i].instack,D);
DumpChar(f->upvalues[i].idx,D);
}
} }
static void DumpDebug(const Proto* f, DumpState* D) static void DumpDebug(const Proto* f, DumpState* D)
{ {
int i,n; int i,n;
DumpString((D->strip) ? NULL : f->source,D);
n= (D->strip) ? 0 : f->sizelineinfo; n= (D->strip) ? 0 : f->sizelineinfo;
DumpVector(f->lineinfo,n,sizeof(int),D); DumpVector(f->lineinfo,n,sizeof(int),D);
n= (D->strip) ? 0 : f->sizelocvars; n= (D->strip) ? 0 : f->sizelocvars;
@ -123,26 +133,25 @@ static void DumpDebug(const Proto* f, DumpState* D)
} }
n= (D->strip) ? 0 : f->sizeupvalues; n= (D->strip) ? 0 : f->sizeupvalues;
DumpInt(n,D); DumpInt(n,D);
for (i=0; i<n; i++) DumpString(f->upvalues[i],D); for (i=0; i<n; i++) DumpString(f->upvalues[i].name,D);
} }
static void DumpFunction(const Proto* f, const TString* p, DumpState* D) static void DumpFunction(const Proto* f, DumpState* D)
{ {
DumpString((f->source==p || D->strip) ? NULL : f->source,D);
DumpInt(f->linedefined,D); DumpInt(f->linedefined,D);
DumpInt(f->lastlinedefined,D); DumpInt(f->lastlinedefined,D);
DumpChar(f->nups,D);
DumpChar(f->numparams,D); DumpChar(f->numparams,D);
DumpChar(f->is_vararg,D); DumpChar(f->is_vararg,D);
DumpChar(f->maxstacksize,D); DumpChar(f->maxstacksize,D);
DumpCode(f,D); DumpCode(f,D);
DumpConstants(f,D); DumpConstants(f,D);
DumpUpvalues(f,D);
DumpDebug(f,D); DumpDebug(f,D);
} }
static void DumpHeader(DumpState* D) static void DumpHeader(DumpState* D)
{ {
char h[LUAC_HEADERSIZE]; lu_byte h[LUAC_HEADERSIZE];
luaU_header(h); luaU_header(h);
DumpBlock(h,LUAC_HEADERSIZE,D); DumpBlock(h,LUAC_HEADERSIZE,D);
} }
@ -159,6 +168,6 @@ int luaU_dump (lua_State* L, const Proto* f, lua_Writer w, void* data, int strip
D.strip=strip; D.strip=strip;
D.status=0; D.status=0;
DumpHeader(&D); DumpHeader(&D);
DumpFunction(f,NULL,&D); DumpFunction(f,&D);
return D.status; return D.status;
} }

View file

@ -1,5 +1,5 @@
/* /*
** $Id: lfunc.c,v 2.12.1.2 2007/12/28 14:58:43 roberto Exp $ ** $Id: lfunc.c,v 2.30.1.1 2013/04/12 18:48:47 roberto Exp $
** Auxiliary functions to manipulate prototypes and closures ** Auxiliary functions to manipulate prototypes and closures
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -20,30 +20,24 @@
Closure *luaF_newCclosure (lua_State *L, int nelems, Table *e) { Closure *luaF_newCclosure (lua_State *L, int n) {
Closure *c = cast(Closure *, luaM_malloc(L, sizeCclosure(nelems))); Closure *c = &luaC_newobj(L, LUA_TCCL, sizeCclosure(n), NULL, 0)->cl;
luaC_link(L, obj2gco(c), LUA_TFUNCTION); c->c.nupvalues = cast_byte(n);
c->c.isC = 1;
c->c.env = e;
c->c.nupvalues = cast_byte(nelems);
return c; return c;
} }
Closure *luaF_newLclosure (lua_State *L, int nelems, Table *e) { Closure *luaF_newLclosure (lua_State *L, int n) {
Closure *c = cast(Closure *, luaM_malloc(L, sizeLclosure(nelems))); Closure *c = &luaC_newobj(L, LUA_TLCL, sizeLclosure(n), NULL, 0)->cl;
luaC_link(L, obj2gco(c), LUA_TFUNCTION); c->l.p = NULL;
c->l.isC = 0; c->l.nupvalues = cast_byte(n);
c->l.env = e; while (n--) c->l.upvals[n] = NULL;
c->l.nupvalues = cast_byte(nelems);
while (nelems--) c->l.upvals[nelems] = NULL;
return c; return c;
} }
UpVal *luaF_newupval (lua_State *L) { UpVal *luaF_newupval (lua_State *L) {
UpVal *uv = luaM_new(L, UpVal); UpVal *uv = &luaC_newobj(L, LUA_TUPVAL, sizeof(UpVal), NULL, 0)->uv;
luaC_link(L, obj2gco(uv), LUA_TUPVAL);
uv->v = &uv->u.value; uv->v = &uv->u.value;
setnilvalue(uv->v); setnilvalue(uv->v);
return uv; return uv;
@ -55,21 +49,20 @@ UpVal *luaF_findupval (lua_State *L, StkId level) {
GCObject **pp = &L->openupval; GCObject **pp = &L->openupval;
UpVal *p; UpVal *p;
UpVal *uv; UpVal *uv;
while (*pp != NULL && (p = ngcotouv(*pp))->v >= level) { while (*pp != NULL && (p = gco2uv(*pp))->v >= level) {
GCObject *o = obj2gco(p);
lua_assert(p->v != &p->u.value); lua_assert(p->v != &p->u.value);
lua_assert(!isold(o) || isold(obj2gco(L)));
if (p->v == level) { /* found a corresponding upvalue? */ if (p->v == level) { /* found a corresponding upvalue? */
if (isdead(g, obj2gco(p))) /* is it dead? */ if (isdead(g, o)) /* is it dead? */
changewhite(obj2gco(p)); /* ressurect it */ changewhite(o); /* resurrect it */
return p; return p;
} }
pp = &p->next; pp = &p->next;
} }
uv = luaM_new(L, UpVal); /* not found: create a new one */ /* not found: create a new one */
uv->tt = LUA_TUPVAL; uv = &luaC_newobj(L, LUA_TUPVAL, sizeof(UpVal), pp, 0)->uv;
uv->marked = luaC_white(g);
uv->v = level; /* current value lives in the stack */ uv->v = level; /* current value lives in the stack */
uv->next = *pp; /* chain it in the proper position */
*pp = obj2gco(uv);
uv->u.l.prev = &g->uvhead; /* double link it in `uvhead' list */ uv->u.l.prev = &g->uvhead; /* double link it in `uvhead' list */
uv->u.l.next = g->uvhead.u.l.next; uv->u.l.next = g->uvhead.u.l.next;
uv->u.l.next->u.l.prev = uv; uv->u.l.next->u.l.prev = uv;
@ -96,41 +89,42 @@ void luaF_freeupval (lua_State *L, UpVal *uv) {
void luaF_close (lua_State *L, StkId level) { void luaF_close (lua_State *L, StkId level) {
UpVal *uv; UpVal *uv;
global_State *g = G(L); global_State *g = G(L);
while (L->openupval != NULL && (uv = ngcotouv(L->openupval))->v >= level) { while (L->openupval != NULL && (uv = gco2uv(L->openupval))->v >= level) {
GCObject *o = obj2gco(uv); GCObject *o = obj2gco(uv);
lua_assert(!isblack(o) && uv->v != &uv->u.value); lua_assert(!isblack(o) && uv->v != &uv->u.value);
L->openupval = uv->next; /* remove from `open' list */ L->openupval = uv->next; /* remove from `open' list */
if (isdead(g, o)) if (isdead(g, o))
luaF_freeupval(L, uv); /* free upvalue */ luaF_freeupval(L, uv); /* free upvalue */
else { else {
unlinkupval(uv); unlinkupval(uv); /* remove upvalue from 'uvhead' list */
setobj(L, &uv->u.value, uv->v); setobj(L, &uv->u.value, uv->v); /* move value to upvalue slot */
uv->v = &uv->u.value; /* now current value lives here */ uv->v = &uv->u.value; /* now current value lives here */
luaC_linkupval(L, uv); /* link upvalue into `gcroot' list */ gch(o)->next = g->allgc; /* link upvalue into 'allgc' list */
g->allgc = o;
luaC_checkupvalcolor(g, uv);
} }
} }
} }
Proto *luaF_newproto (lua_State *L) { Proto *luaF_newproto (lua_State *L) {
Proto *f = luaM_new(L, Proto); Proto *f = &luaC_newobj(L, LUA_TPROTO, sizeof(Proto), NULL, 0)->p;
luaC_link(L, obj2gco(f), LUA_TPROTO);
f->k = NULL; f->k = NULL;
f->sizek = 0; f->sizek = 0;
f->p = NULL; f->p = NULL;
f->sizep = 0; f->sizep = 0;
f->code = NULL; f->code = NULL;
f->cache = NULL;
f->sizecode = 0; f->sizecode = 0;
f->lineinfo = NULL;
f->sizelineinfo = 0; f->sizelineinfo = 0;
f->sizeupvalues = 0;
f->nups = 0;
f->upvalues = NULL; f->upvalues = NULL;
f->sizeupvalues = 0;
f->numparams = 0; f->numparams = 0;
f->is_vararg = 0; f->is_vararg = 0;
f->maxstacksize = 0; f->maxstacksize = 0;
f->lineinfo = NULL;
f->sizelocvars = 0;
f->locvars = NULL; f->locvars = NULL;
f->sizelocvars = 0;
f->linedefined = 0; f->linedefined = 0;
f->lastlinedefined = 0; f->lastlinedefined = 0;
f->source = NULL; f->source = NULL;
@ -139,23 +133,16 @@ Proto *luaF_newproto (lua_State *L) {
void luaF_freeproto (lua_State *L, Proto *f) { void luaF_freeproto (lua_State *L, Proto *f) {
luaM_freearray(L, f->code, f->sizecode, Instruction); luaM_freearray(L, f->code, f->sizecode);
luaM_freearray(L, f->p, f->sizep, Proto *); luaM_freearray(L, f->p, f->sizep);
luaM_freearray(L, f->k, f->sizek, TValue); luaM_freearray(L, f->k, f->sizek);
luaM_freearray(L, f->lineinfo, f->sizelineinfo, int); luaM_freearray(L, f->lineinfo, f->sizelineinfo);
luaM_freearray(L, f->locvars, f->sizelocvars, struct LocVar); luaM_freearray(L, f->locvars, f->sizelocvars);
luaM_freearray(L, f->upvalues, f->sizeupvalues, TString *); luaM_freearray(L, f->upvalues, f->sizeupvalues);
luaM_free(L, f); luaM_free(L, f);
} }
void luaF_freeclosure (lua_State *L, Closure *c) {
int size = (c->c.isC) ? sizeCclosure(c->c.nupvalues) :
sizeLclosure(c->l.nupvalues);
luaM_freemem(L, c, size);
}
/* /*
** Look for n-th local variable at line `line' in function `func'. ** Look for n-th local variable at line `line' in function `func'.
** Returns NULL if not found. ** Returns NULL if not found.

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: lfunc.h,v 2.8.1.1 2013/04/12 18:48:47 roberto Exp $
** Auxiliary functions to manipulate prototypes and closures ** Auxiliary functions to manipulate prototypes and closures
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -19,13 +19,12 @@
LUAI_FUNC Proto *luaF_newproto (lua_State *L); LUAI_FUNC Proto *luaF_newproto (lua_State *L);
LUAI_FUNC Closure *luaF_newCclosure (lua_State *L, int nelems, Table *e); LUAI_FUNC Closure *luaF_newCclosure (lua_State *L, int nelems);
LUAI_FUNC Closure *luaF_newLclosure (lua_State *L, int nelems, Table *e); LUAI_FUNC Closure *luaF_newLclosure (lua_State *L, int nelems);
LUAI_FUNC UpVal *luaF_newupval (lua_State *L); LUAI_FUNC UpVal *luaF_newupval (lua_State *L);
LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level); LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level);
LUAI_FUNC void luaF_close (lua_State *L, StkId level); LUAI_FUNC void luaF_close (lua_State *L, StkId level);
LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f); LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f);
LUAI_FUNC void luaF_freeclosure (lua_State *L, Closure *c);
LUAI_FUNC void luaF_freeupval (lua_State *L, UpVal *uv); LUAI_FUNC void luaF_freeupval (lua_State *L, UpVal *uv);
LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number, LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number,
int pc); int pc);

File diff suppressed because it is too large Load diff

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: lgc.h,v 2.58.1.1 2013/04/12 18:48:47 roberto Exp $
** Garbage Collector ** Garbage Collector
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -9,65 +9,107 @@
#include "lobject.h" #include "lobject.h"
#include "lstate.h"
/*
** Collectable objects may have one of three colors: white, which
** means the object is not marked; gray, which means the
** object is marked, but its references may be not marked; and
** black, which means that the object and all its references are marked.
** The main invariant of the garbage collector, while marking objects,
** is that a black object can never point to a white one. Moreover,
** any gray object must be in a "gray list" (gray, grayagain, weak,
** allweak, ephemeron) so that it can be visited again before finishing
** the collection cycle. These lists have no meaning when the invariant
** is not being enforced (e.g., sweep phase).
*/
/* how much to allocate before next GC step */
#if !defined(GCSTEPSIZE)
/* ~100 small strings */
#define GCSTEPSIZE (cast_int(100 * sizeof(TString)))
#endif
/* /*
** Possible states of the Garbage Collector ** Possible states of the Garbage Collector
*/ */
#define GCSpause 0 #define GCSpropagate 0
#define GCSpropagate 1 #define GCSatomic 1
#define GCSsweepstring 2 #define GCSsweepstring 2
#define GCSsweep 3 #define GCSsweepudata 3
#define GCSfinalize 4 #define GCSsweep 4
#define GCSpause 5
#define issweepphase(g) \
(GCSsweepstring <= (g)->gcstate && (g)->gcstate <= GCSsweep)
#define isgenerational(g) ((g)->gckind == KGC_GEN)
/*
** macros to tell when main invariant (white objects cannot point to black
** ones) must be kept. During a non-generational collection, the sweep
** phase may break the invariant, as objects turned white may point to
** still-black objects. The invariant is restored when sweep ends and
** all objects are white again. During a generational collection, the
** invariant must be kept all times.
*/
#define keepinvariant(g) (isgenerational(g) || g->gcstate <= GCSatomic)
/* /*
** some userful bit tricks ** Outside the collector, the state in generational mode is kept in
** 'propagate', so 'keepinvariant' is always true.
*/ */
#define resetbits(x,m) ((x) &= cast(lu_byte, ~(m))) #define keepinvariantout(g) \
#define setbits(x,m) ((x) |= (m)) check_exp(g->gcstate == GCSpropagate || !isgenerational(g), \
#define testbits(x,m) ((x) & (m)) g->gcstate <= GCSatomic)
#define bitmask(b) (1<<(b))
#define bit2mask(b1,b2) (bitmask(b1) | bitmask(b2))
#define l_setbit(x,b) setbits(x, bitmask(b))
#define resetbit(x,b) resetbits(x, bitmask(b))
#define testbit(x,b) testbits(x, bitmask(b))
#define set2bits(x,b1,b2) setbits(x, (bit2mask(b1, b2)))
#define reset2bits(x,b1,b2) resetbits(x, (bit2mask(b1, b2)))
#define test2bits(x,b1,b2) testbits(x, (bit2mask(b1, b2)))
/* /*
** Layout for bit use in `marked' field: ** some useful bit tricks
** bit 0 - object is white (type 0)
** bit 1 - object is white (type 1)
** bit 2 - object is black
** bit 3 - for userdata: has been finalized
** bit 3 - for tables: has weak keys
** bit 4 - for tables: has weak values
** bit 5 - object is fixed (should not be collected)
** bit 6 - object is "super" fixed (only the main thread)
*/ */
#define resetbits(x,m) ((x) &= cast(lu_byte, ~(m)))
#define setbits(x,m) ((x) |= (m))
#define testbits(x,m) ((x) & (m))
#define bitmask(b) (1<<(b))
#define bit2mask(b1,b2) (bitmask(b1) | bitmask(b2))
#define l_setbit(x,b) setbits(x, bitmask(b))
#define resetbit(x,b) resetbits(x, bitmask(b))
#define testbit(x,b) testbits(x, bitmask(b))
#define WHITE0BIT 0 /* Layout for bit use in `marked' field: */
#define WHITE1BIT 1 #define WHITE0BIT 0 /* object is white (type 0) */
#define BLACKBIT 2 #define WHITE1BIT 1 /* object is white (type 1) */
#define FINALIZEDBIT 3 #define BLACKBIT 2 /* object is black */
#define KEYWEAKBIT 3 #define FINALIZEDBIT 3 /* object has been separated for finalization */
#define VALUEWEAKBIT 4 #define SEPARATED 4 /* object is in 'finobj' list or in 'tobefnz' */
#define FIXEDBIT 5 #define FIXEDBIT 5 /* object is fixed (should not be collected) */
#define SFIXEDBIT 6 #define OLDBIT 6 /* object is old (only in generational mode) */
/* bit 7 is currently used by tests (luaL_checkmemory) */
#define WHITEBITS bit2mask(WHITE0BIT, WHITE1BIT) #define WHITEBITS bit2mask(WHITE0BIT, WHITE1BIT)
#define iswhite(x) test2bits((x)->gch.marked, WHITE0BIT, WHITE1BIT) #define iswhite(x) testbits((x)->gch.marked, WHITEBITS)
#define isblack(x) testbit((x)->gch.marked, BLACKBIT) #define isblack(x) testbit((x)->gch.marked, BLACKBIT)
#define isgray(x) (!isblack(x) && !iswhite(x)) #define isgray(x) /* neither white nor black */ \
(!testbits((x)->gch.marked, WHITEBITS | bitmask(BLACKBIT)))
#define isold(x) testbit((x)->gch.marked, OLDBIT)
/* MOVE OLD rule: whenever an object is moved to the beginning of
a GC list, its old bit must be cleared */
#define resetoldbit(o) resetbit((o)->gch.marked, OLDBIT)
#define otherwhite(g) (g->currentwhite ^ WHITEBITS) #define otherwhite(g) (g->currentwhite ^ WHITEBITS)
#define isdead(g,v) ((v)->gch.marked & otherwhite(g) & WHITEBITS) #define isdeadm(ow,m) (!(((m) ^ WHITEBITS) & (ow)))
#define isdead(g,v) isdeadm(otherwhite(g), (v)->gch.marked)
#define changewhite(x) ((x)->gch.marked ^= WHITEBITS) #define changewhite(x) ((x)->gch.marked ^= WHITEBITS)
#define gray2black(x) l_setbit((x)->gch.marked, BLACKBIT) #define gray2black(x) l_setbit((x)->gch.marked, BLACKBIT)
@ -77,34 +119,39 @@
#define luaC_white(g) cast(lu_byte, (g)->currentwhite & WHITEBITS) #define luaC_white(g) cast(lu_byte, (g)->currentwhite & WHITEBITS)
#define luaC_checkGC(L) { \ #define luaC_condGC(L,c) \
condhardstacktests(luaD_reallocstack(L, L->stacksize - EXTRA_STACK - 1)); \ {if (G(L)->GCdebt > 0) {c;}; condchangemem(L);}
if (G(L)->totalbytes >= G(L)->GCthreshold) \ #define luaC_checkGC(L) luaC_condGC(L, luaC_step(L);)
luaC_step(L); }
#define luaC_barrier(L,p,v) { if (valiswhite(v) && isblack(obj2gco(p))) \ #define luaC_barrier(L,p,v) { if (valiswhite(v) && isblack(obj2gco(p))) \
luaC_barrierf(L,obj2gco(p),gcvalue(v)); } luaC_barrier_(L,obj2gco(p),gcvalue(v)); }
#define luaC_barriert(L,t,v) { if (valiswhite(v) && isblack(obj2gco(t))) \ #define luaC_barrierback(L,p,v) { if (valiswhite(v) && isblack(obj2gco(p))) \
luaC_barrierback(L,t); } luaC_barrierback_(L,p); }
#define luaC_objbarrier(L,p,o) \ #define luaC_objbarrier(L,p,o) \
{ if (iswhite(obj2gco(o)) && isblack(obj2gco(p))) \ { if (iswhite(obj2gco(o)) && isblack(obj2gco(p))) \
luaC_barrierf(L,obj2gco(p),obj2gco(o)); } luaC_barrier_(L,obj2gco(p),obj2gco(o)); }
#define luaC_objbarriert(L,t,o) \ #define luaC_objbarrierback(L,p,o) \
{ if (iswhite(obj2gco(o)) && isblack(obj2gco(t))) luaC_barrierback(L,t); } { if (iswhite(obj2gco(o)) && isblack(obj2gco(p))) luaC_barrierback_(L,p); }
LUAI_FUNC size_t luaC_separateudata (lua_State *L, int all); #define luaC_barrierproto(L,p,c) \
LUAI_FUNC void luaC_callGCTM (lua_State *L); { if (isblack(obj2gco(p))) luaC_barrierproto_(L,p,c); }
LUAI_FUNC void luaC_freeall (lua_State *L);
LUAI_FUNC void luaC_freeallobjects (lua_State *L);
LUAI_FUNC void luaC_step (lua_State *L); LUAI_FUNC void luaC_step (lua_State *L);
LUAI_FUNC void luaC_fullgc (lua_State *L); LUAI_FUNC void luaC_forcestep (lua_State *L);
LUAI_FUNC void luaC_link (lua_State *L, GCObject *o, lu_byte tt); LUAI_FUNC void luaC_runtilstate (lua_State *L, int statesmask);
LUAI_FUNC void luaC_linkupval (lua_State *L, UpVal *uv); LUAI_FUNC void luaC_fullgc (lua_State *L, int isemergency);
LUAI_FUNC void luaC_barrierf (lua_State *L, GCObject *o, GCObject *v); LUAI_FUNC GCObject *luaC_newobj (lua_State *L, int tt, size_t sz,
LUAI_FUNC void luaC_barrierback (lua_State *L, Table *t); GCObject **list, int offset);
LUAI_FUNC void luaC_barrier_ (lua_State *L, GCObject *o, GCObject *v);
LUAI_FUNC void luaC_barrierback_ (lua_State *L, GCObject *o);
LUAI_FUNC void luaC_barrierproto_ (lua_State *L, Proto *p, Closure *c);
LUAI_FUNC void luaC_checkfinalizer (lua_State *L, GCObject *o, Table *mt);
LUAI_FUNC void luaC_checkupvalcolor (global_State *g, UpVal *uv);
LUAI_FUNC void luaC_changemode (lua_State *L, int mode);
#endif #endif

View file

@ -1,10 +1,21 @@
/* /*
** $Id: liolib.c,v 2.73.1.3 2008/01/18 17:47:43 roberto Exp $ ** $Id: liolib.c,v 2.112.1.1 2013/04/12 18:48:47 roberto Exp $
** Standard I/O (and system) library ** Standard I/O (and system) library
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
/*
** This definition must come before the inclusion of 'stdio.h'; it
** should not affect non-POSIX systems
*/
#if !defined(_FILE_OFFSET_BITS)
#define _LARGEFILE_SOURCE 1
#define _FILE_OFFSET_BITS 64
#endif
#include <errno.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
@ -19,46 +30,111 @@
#include "rocklibc.h" #include "rocklibc.h"
#if !defined(lua_checkmode)
#define IO_INPUT 1 /*
#define IO_OUTPUT 2 ** Check whether 'mode' matches '[rwa]%+?b?'.
** Change this macro to accept other modes for 'fopen' besides
** the standard ones.
*/
#define lua_checkmode(mode) \
(*mode != '\0' && strchr("rwa", *(mode++)) != NULL && \
(*mode != '+' || ++mode) && /* skip if char is '+' */ \
(*mode != 'b' || ++mode) && /* skip if char is 'b' */ \
(*mode == '\0'))
#endif
/*
** {======================================================
** lua_popen spawns a new process connected to the current
** one through the file streams.
** =======================================================
*/
#if !defined(lua_popen) /* { */
#if defined(LUA_USE_POPEN) /* { */
#define lua_popen(L,c,m) ((void)L, fflush(NULL), popen(c,m))
#define lua_pclose(L,file) ((void)L, pclose(file))
#elif defined(LUA_WIN) /* }{ */
#define lua_popen(L,c,m) ((void)L, _popen(c,m))
#define lua_pclose(L,file) ((void)L, _pclose(file))
static const char *const fnames[] = {"input", "output"}; #else /* }{ */
#define lua_popen(L,c,m) ((void)((void)c, m), \
luaL_error(L, LUA_QL("popen") " not supported"), (FILE*)0)
#define lua_pclose(L,file) ((void)((void)L, file), -1)
static int pushresult (lua_State *L, int i, const char *filename) { #endif /* } */
int en = errno;
if (i) { #endif /* } */
lua_pushboolean(L, 1);
return 1; /* }====================================================== */
}
else {
lua_pushnil(L);
if (filename)
lua_pushfstring(L, "%s: %s", filename, strerror(en));
else
lua_pushfstring(L, "%s", strerror(en));
lua_pushinteger(L, 0);
return 3;
}
}
static void fileerror (lua_State *L, int arg, const char *filename) { /*
lua_pushfstring(L, "%s: %s", filename, strerror(errno)); ** {======================================================
luaL_argerror(L, arg, lua_tostring(L, -1)); ** lua_fseek: configuration for longer offsets
} ** =======================================================
*/
#if !defined(lua_fseek) && !defined(LUA_ANSI) /* { */
#if defined(LUA_USE_POSIX) /* { */
#define l_fseek(f,o,w) fseeko(f,o,w)
#define l_ftell(f) ftello(f)
#define l_seeknum off_t
#elif defined(LUA_WIN) && !defined(_CRTIMP_TYPEINFO) \
&& defined(_MSC_VER) && (_MSC_VER >= 1400) /* }{ */
/* Windows (but not DDK) and Visual C++ 2005 or higher */
#define l_fseek(f,o,w) _fseeki64(f,o,w)
#define l_ftell(f) _ftelli64(f)
#define l_seeknum __int64
#endif /* } */
#endif /* } */
#if !defined(l_fseek) /* default definitions */
#define l_fseek(f,o,w) fseek(f,o,w)
#define l_ftell(f) ftell(f)
#define l_seeknum long
#endif
/* }====================================================== */
#define IO_PREFIX "_IO_"
#define IO_INPUT (IO_PREFIX "input")
#define IO_OUTPUT (IO_PREFIX "output")
typedef luaL_Stream LStream;
#define tolstream(L) ((LStream *)luaL_checkudata(L, 1, LUA_FILEHANDLE))
#define isclosed(p) ((p)->closef == NULL)
static int io_type (lua_State *L) { static int io_type (lua_State *L) {
void *ud; LStream *p;
luaL_checkany(L, 1); luaL_checkany(L, 1);
ud = lua_touserdata(L, 1); p = (LStream *)luaL_testudata(L, 1, LUA_FILEHANDLE);
lua_getfield(L, LUA_REGISTRYINDEX, LUA_FILEHANDLE); if (p == NULL)
if (ud == NULL || !lua_getmetatable(L, 1) || !lua_rawequal(L, -2, -1))
lua_pushnil(L); /* not a file */ lua_pushnil(L); /* not a file */
else if (*((int *)ud) < 0) else if (isclosed(p))
lua_pushliteral(L, "closed file"); lua_pushliteral(L, "closed file");
else else
lua_pushliteral(L, "file"); lua_pushliteral(L, "file");
@ -66,26 +142,59 @@ static int io_type (lua_State *L) {
} }
static int* tofile (lua_State *L) { static int f_tostring (lua_State *L) {
int *f = (int*) luaL_checkudata(L, 1, LUA_FILEHANDLE); LStream *p = tolstream(L);
if (*f < 0) if (isclosed(p))
luaL_error(L, "attempt to use a closed file"); lua_pushliteral(L, "file (closed)");
return f; else
lua_pushfstring(L, "file (%p)", p->f);
return 1;
} }
static FILE *tofile (lua_State *L) {
LStream *p = tolstream(L);
if (isclosed(p))
luaL_error(L, "attempt to use a closed file");
lua_assert(p->f);
return p->f;
}
/* /*
** When creating file handles, always creates a `closed' file handle ** When creating file handles, always creates a `closed' file handle
** before opening the actual file; so, if there is a memory error, the ** before opening the actual file; so, if there is a memory error, the
** file is not left opened. ** file is not left opened.
*/ */
static int* newfile (lua_State *L) { static LStream *newprefile (lua_State *L) {
int *pf = (int *)lua_newuserdata(L, sizeof(int)); LStream *p = (LStream *)lua_newuserdata(L, sizeof(LStream));
*pf = -1; /* file handle is currently `closed' */ p->closef = NULL; /* mark file handle as 'closed' */
luaL_getmetatable(L, LUA_FILEHANDLE); luaL_setmetatable(L, LUA_FILEHANDLE);
lua_setmetatable(L, -2); return p;
return pf; }
static int aux_close (lua_State *L) {
LStream *p = tolstream(L);
lua_CFunction cf = p->closef;
p->closef = NULL; /* mark stream as closed */
return (*cf)(L); /* close it */
}
static int io_close (lua_State *L) {
if (lua_isnone(L, 1)) /* no argument? */
lua_getfield(L, LUA_REGISTRYINDEX, IO_OUTPUT); /* use standard output */
tofile(L); /* make sure argument is an open stream */
return aux_close(L);
}
static int f_gc (lua_State *L) {
LStream *p = tolstream(L);
if (!isclosed(p) && p->f != NULL)
aux_close(L); /* ignore closed and incompletely open files */
return 0;
} }
@ -93,49 +202,37 @@ static int* newfile (lua_State *L) {
** function to close regular files ** function to close regular files
*/ */
static int io_fclose (lua_State *L) { static int io_fclose (lua_State *L) {
int *p = tofile(L); LStream *p = tolstream(L);
int ok = (rb->close(*p) == 0); int res = rb->close((int)p->f);
*p = -1; return luaL_fileresult(L, (res == 0), NULL);
return pushresult(L, ok, NULL);
} }
static inline int aux_close (lua_State *L) { static LStream *newfile (lua_State *L) {
return io_fclose(L); LStream *p = newprefile(L);
p->f = NULL;
p->closef = &io_fclose;
return p;
} }
static int io_close (lua_State *L) { static void opencheck (lua_State *L, const char *fname, const char *mode) {
if (lua_isnone(L, 1)) LStream *p = newfile(L);
lua_rawgeti(L, LUA_ENVIRONINDEX, IO_OUTPUT); int flags = O_RDONLY;
tofile(L); /* make sure argument is a file */ if (strcmp(mode, "w") == 0)
return aux_close(L); flags = O_WRONLY;
} p->f = (FILE*)rb->open(fname, flags);
if (p->f == NULL)
luaL_error(L, "cannot open file " LUA_QS " (%s)", fname, strerror(errno));
static int io_gc (lua_State *L) {
int f = *(int*) luaL_checkudata(L, 1, LUA_FILEHANDLE);
/* ignore closed files */
if (f >= 0)
aux_close(L);
return 0;
}
static int io_tostring (lua_State *L) {
int f = *(int*) luaL_checkudata(L, 1, LUA_FILEHANDLE);
if (f < 0)
lua_pushliteral(L, "file (closed)");
else
lua_pushfstring(L, "file (%d)", f);
return 1;
} }
static int io_open (lua_State *L) { static int io_open (lua_State *L) {
const char *filename = luaL_checkstring(L, 1); const char *filename = luaL_checkstring(L, 1);
const char *mode = luaL_optstring(L, 2, "r"); const char *mode = luaL_optstring(L, 2, "r");
int *pf = newfile(L); LStream *p = newfile(L);
const char *md = mode; /* to traverse/check mode */
luaL_argcheck(L, lua_checkmode(md), 2, "invalid mode");
int flags = 0; int flags = 0;
if(*(mode+1) == '+') { if(*(mode+1) == '+') {
flags = O_RDWR; flags = O_RDWR;
@ -158,84 +255,117 @@ static int io_open (lua_State *L) {
} }
if((*mode == 'w' || *mode == 'a') && !rb->file_exists(filename)) if((*mode == 'w' || *mode == 'a') && !rb->file_exists(filename))
flags |= O_CREAT; flags |= O_CREAT;
*pf = rb->open(filename, flags, 0666); int pf = rb->open(filename, flags, 0666);
return (*pf < 0) ? pushresult(L, 0, filename) : 1; p->f = (FILE*)pf;
return (pf < 0) ? luaL_fileresult(L, 0, filename) : 1;
} }
static int* getiofile (lua_State *L, int findex) { #if 0
int *f; /*
lua_rawgeti(L, LUA_ENVIRONINDEX, findex); ** function to close 'popen' files
f = (int *)lua_touserdata(L, -1); */
if (f == NULL || *f < 0) static int io_pclose (lua_State *L) {
luaL_error(L, "standard %s file is closed", fnames[findex - 1]); LStream *p = tolstream(L);
return f; return luaL_execresult(L, lua_pclose(L, p->f));
} }
static int g_iofile (lua_State *L, int f, int flags) { static int io_popen (lua_State *L) {
const char *filename = luaL_checkstring(L, 1);
const char *mode = luaL_optstring(L, 2, "r");
LStream *p = newprefile(L);
p->f = lua_popen(L, filename, mode);
p->closef = &io_pclose;
return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1;
}
static int io_tmpfile (lua_State *L) {
LStream *p = newfile(L);
p->f = tmpfile();
return (p->f == NULL) ? luaL_fileresult(L, 0, NULL) : 1;
}
#endif
static FILE *getiofile (lua_State *L, const char *findex) {
LStream *p;
lua_getfield(L, LUA_REGISTRYINDEX, findex);
p = (LStream *)lua_touserdata(L, -1);
if (isclosed(p))
luaL_error(L, "standard %s file is closed", findex + strlen(IO_PREFIX));
return p->f;
}
static int g_iofile (lua_State *L, const char *f, const char *mode) {
if (!lua_isnoneornil(L, 1)) { if (!lua_isnoneornil(L, 1)) {
const char *filename = lua_tostring(L, 1); const char *filename = lua_tostring(L, 1);
if (filename) { if (filename)
int *pf = newfile(L); opencheck(L, filename, mode);
*pf = rb->open(filename, flags);
if (*pf < 0)
fileerror(L, 1, filename);
}
else { else {
tofile(L); /* check that it's a valid file handle */ tofile(L); /* check that it's a valid file handle */
lua_pushvalue(L, 1); lua_pushvalue(L, 1);
} }
lua_rawseti(L, LUA_ENVIRONINDEX, f); lua_setfield(L, LUA_REGISTRYINDEX, f);
} }
/* return current value */ /* return current value */
lua_rawgeti(L, LUA_ENVIRONINDEX, f); lua_getfield(L, LUA_REGISTRYINDEX, f);
return 1; return 1;
} }
static int io_input (lua_State *L) { static int io_input (lua_State *L) {
return g_iofile(L, IO_INPUT, O_RDONLY); return g_iofile(L, IO_INPUT, "r");
} }
static int io_output (lua_State *L) { static int io_output (lua_State *L) {
return g_iofile(L, IO_OUTPUT, O_WRONLY); return g_iofile(L, IO_OUTPUT, "w");
} }
static int io_readline (lua_State *L); static int io_readline (lua_State *L);
static void aux_lines (lua_State *L, int idx, int toclose) { static void aux_lines (lua_State *L, int toclose) {
lua_pushvalue(L, idx); int i;
int n = lua_gettop(L) - 1; /* number of arguments to read */
/* ensure that arguments will fit here and into 'io_readline' stack */
luaL_argcheck(L, n <= LUA_MINSTACK - 3, LUA_MINSTACK - 3, "too many options");
lua_pushvalue(L, 1); /* file handle */
lua_pushinteger(L, n); /* number of arguments to read */
lua_pushboolean(L, toclose); /* close/not close file when finished */ lua_pushboolean(L, toclose); /* close/not close file when finished */
lua_pushcclosure(L, io_readline, 2); for (i = 1; i <= n; i++) lua_pushvalue(L, i + 1); /* copy arguments */
lua_pushcclosure(L, io_readline, 3 + n);
} }
static int f_lines (lua_State *L) { static int f_lines (lua_State *L) {
tofile(L); /* check that it's a valid file handle */ tofile(L); /* check that it's a valid file handle */
aux_lines(L, 1, 0); aux_lines(L, 0);
return 1; return 1;
} }
static int io_lines (lua_State *L) { static int io_lines (lua_State *L) {
if (lua_isnoneornil(L, 1)) { /* no arguments? */ int toclose;
/* will iterate over default input */ if (lua_isnone(L, 1)) lua_pushnil(L); /* at least one argument */
lua_rawgeti(L, LUA_ENVIRONINDEX, IO_INPUT); if (lua_isnil(L, 1)) { /* no file name? */
return f_lines(L); lua_getfield(L, LUA_REGISTRYINDEX, IO_INPUT); /* get default input */
lua_replace(L, 1); /* put it at index 1 */
tofile(L); /* check that it's a valid file handle */
toclose = 0; /* do not close it after iteration */
} }
else { else { /* open a new file */
const char *filename = luaL_checkstring(L, 1); const char *filename = luaL_checkstring(L, 1);
int *pf = newfile(L); opencheck(L, filename, "r");
*pf = rb->open(filename, O_RDONLY); lua_replace(L, 1); /* put file at index 1 */
if (*pf < 0) toclose = 1; /* close it after iteration */
fileerror(L, 1, filename);
aux_lines(L, lua_gettop(L), 1);
return 1;
} }
aux_lines(L, toclose);
return 1;
} }
@ -245,72 +375,89 @@ static int io_lines (lua_State *L) {
** ======================================================= ** =======================================================
*/ */
static int read_number (lua_State *L, int *f) {
static int read_number (lua_State *L, FILE *f) {
lua_Number d; lua_Number d;
if (PREFIX(fscanf)(*f, LUA_NUMBER_SCAN, &d) == 1) { if (PREFIX(fscanf)(f, LUA_NUMBER_SCAN, &d) == 1) {
lua_pushnumber(L, d); lua_pushnumber(L, d);
return 1; return 1;
} }
else return 0; /* read fails */ else {
lua_pushnil(L); /* "result" to be removed */
return 0; /* read fails */
}
} }
static int test_eof (lua_State *L, int *f) { static int test_eof (lua_State *L, FILE *f) {
ssize_t s = rb->lseek(*f, 0, SEEK_CUR); ssize_t s = rb->lseek((int)f, 0, SEEK_CUR);
lua_pushlstring(L, NULL, 0); lua_pushlstring(L, NULL, 0);
return s != rb->filesize(*f); return s != rb->filesize((int)f);
} }
/* Rockbox already defines read_line() */ /* Rockbox already defines read_line() */
static int _read_line (lua_State *L, int *f) { static int _read_line (lua_State *L, FILE *f, int chop) {
luaL_Buffer b; luaL_Buffer b;
luaL_buffinit(L, &b); luaL_buffinit(L, &b);
for (;;) { for (;;) {
size_t l; size_t l;
size_t r; size_t r;
char *p = luaL_prepbuffer(&b); char *p = luaL_prepbuffer(&b);
r = rb->read_line(*f, p, LUAL_BUFFERSIZE); r = rb->read_line((int)f, p, LUAL_BUFFERSIZE);
l = strlen(p); l = strlen(p);
if (l == 0 || p[l-1] != '\n') if (l == 0 || p[l-1] != '\n')
luaL_addsize(&b, l); luaL_addsize(&b, l);
else { else {
luaL_addsize(&b, l - 1); /* do not include `eol' */ luaL_addsize(&b, l - chop); /* chop 'eol' if needed */
luaL_pushresult(&b); /* close buffer */ luaL_pushresult(&b); /* close buffer */
return 1; /* read at least an `eol' */ return 1; /* read at least an `eol' */
} }
if (r < LUAL_BUFFERSIZE) { /* eof? */ if (r < LUAL_BUFFERSIZE) { /* eof? */
luaL_pushresult(&b); /* close buffer */ luaL_pushresult(&b); /* close buffer */
return (lua_objlen(L, -1) > 0); /* check whether read something */ return (lua_rawlen(L, -1) > 0); /* check whether read something */
} }
} }
} }
static int read_chars (lua_State *L, int *f, size_t n) { #define MAX_SIZE_T (~(size_t)0)
size_t rlen; /* how much to read */
size_t nr; /* number of chars actually read */ static void read_all (lua_State *L, FILE *f) {
size_t rlen = LUAL_BUFFERSIZE; /* how much to read in each cycle */
luaL_Buffer b; luaL_Buffer b;
luaL_buffinit(L, &b); luaL_buffinit(L, &b);
rlen = LUAL_BUFFERSIZE; /* try to read that much each time */ for (;;) {
do { char *p = luaL_prepbuffsize(&b, rlen);
char *p = luaL_prepbuffer(&b); size_t nr = rb->read((int)f, p, rlen);
if (rlen > n) rlen = n; /* cannot read more than asked */
nr = rb->read(*f, p, rlen);
luaL_addsize(&b, nr); luaL_addsize(&b, nr);
n -= nr; /* still have to read `n' chars */ if (nr < rlen) break; /* eof? */
} while (n > 0 && nr == rlen); /* until end of count or eof */ else if (rlen <= (MAX_SIZE_T / 4)) /* avoid buffers too large */
rlen *= 2; /* double buffer size at each iteration */
}
luaL_pushresult(&b); /* close buffer */ luaL_pushresult(&b); /* close buffer */
return (n == 0 || lua_objlen(L, -1) > 0);
} }
static int g_read (lua_State *L, int *f, int first) { static int read_chars (lua_State *L, FILE *f, size_t n) {
size_t nr; /* number of chars actually read */
char *p;
luaL_Buffer b;
luaL_buffinit(L, &b);
p = luaL_prepbuffsize(&b, n); /* prepare buffer to read whole block */
nr = rb->read((int)f, p, n); /* try to read 'n' chars */
luaL_addsize(&b, nr);
luaL_pushresult(&b); /* close buffer */
return (nr > 0); /* true iff read something */
}
static int g_read (lua_State *L, FILE *f, int first) {
int nargs = lua_gettop(L) - 1; int nargs = lua_gettop(L) - 1;
int success; int success;
int n; int n;
if (nargs == 0) { /* no arguments? */ if (nargs == 0) { /* no arguments? */
success = _read_line(L, f); success = _read_line(L, f, 1);
n = first+1; /* to return 1 result */ n = first+1; /* to return 1 result */
} }
else { /* ensure stack space for all results and for auxlib's buffer */ else { /* ensure stack space for all results and for auxlib's buffer */
@ -329,10 +476,13 @@ static int g_read (lua_State *L, int *f, int first) {
success = read_number(L, f); success = read_number(L, f);
break; break;
case 'l': /* line */ case 'l': /* line */
success = _read_line(L, f); success = _read_line(L, f, 1);
break;
case 'L': /* line with end-of-line */
success = _read_line(L, f, 0);
break; break;
case 'a': /* file */ case 'a': /* file */
read_chars(L, f, ~((size_t)0)); /* read MAX_SIZE_T chars */ read_all(L, f); /* read entire file */
success = 1; /* always success */ success = 1; /* always success */
break; break;
default: default:
@ -360,14 +510,24 @@ static int f_read (lua_State *L) {
static int io_readline (lua_State *L) { static int io_readline (lua_State *L) {
int *f = (int *) lua_touserdata(L, lua_upvalueindex(1)); LStream *p = (LStream *)lua_touserdata(L, lua_upvalueindex(1));
int sucess; int i;
if (*f < 0) /* file is already closed? */ int n = (int)lua_tointeger(L, lua_upvalueindex(2));
luaL_error(L, "file is already closed"); if (isclosed(p)) /* file is already closed? */
sucess = _read_line(L, f); return luaL_error(L, "file is already closed");
if (sucess) return 1; lua_settop(L , 1);
else { /* EOF */ for (i = 1; i <= n; i++) /* push arguments to 'g_read' */
if (lua_toboolean(L, lua_upvalueindex(2))) { /* generator created file? */ lua_pushvalue(L, lua_upvalueindex(3 + i));
n = g_read(L, p->f, 2); /* 'n' is number of results */
lua_assert(n > 0); /* should return at least a nil */
if (!lua_isnil(L, -n)) /* read at least one value? */
return n; /* return them */
else { /* first result is nil: EOF or error */
if (n > 1) { /* is there error information? */
/* 2nd result is error message */
return luaL_error(L, "%s", lua_tostring(L, -n + 1));
}
if (lua_toboolean(L, lua_upvalueindex(3))) { /* generator created file? */
lua_settop(L, 0); lua_settop(L, 0);
lua_pushvalue(L, lua_upvalueindex(1)); lua_pushvalue(L, lua_upvalueindex(1));
aux_close(L); /* close it */ aux_close(L); /* close it */
@ -379,22 +539,23 @@ static int io_readline (lua_State *L) {
/* }====================================================== */ /* }====================================================== */
static int g_write (lua_State *L, int *f, int arg) { static int g_write (lua_State *L, FILE *f, int arg) {
int nargs = lua_gettop(L) - 1; int nargs = lua_gettop(L) - arg;
int status = 1; int status = 1;
for (; nargs--; arg++) { for (; nargs--; arg++) {
if (lua_type(L, arg) == LUA_TNUMBER) { if (lua_type(L, arg) == LUA_TNUMBER) {
/* optimization: could be done exactly as for strings */ /* optimization: could be done exactly as for strings */
status = status && status = status &&
rb->fdprintf(*f, LUA_NUMBER_FMT, lua_tonumber(L, arg)) > 0; rb->fdprintf((int)f, LUA_NUMBER_FMT, lua_tonumber(L, arg)) > 0;
} }
else { else {
size_t l; size_t l;
const char *s = luaL_checklstring(L, arg, &l); const char *s = luaL_checklstring(L, arg, &l);
status = status && (rb->write(*f, s, l) == (ssize_t)l); status = status && (rb->write((int)f, s, l) == (ssize_t)l);
} }
} }
return pushresult(L, status, NULL); if (status) return 1; /* file handle already on stack top */
else return luaL_fileresult(L, status, NULL);
} }
@ -404,47 +565,86 @@ static int io_write (lua_State *L) {
static int f_write (lua_State *L) { static int f_write (lua_State *L) {
return g_write(L, tofile(L), 2); FILE *f = tofile(L);
lua_pushvalue(L, 1); /* push file at the stack top (to be returned) */
return g_write(L, f, 2);
} }
static int f_seek (lua_State *L) { static int f_seek (lua_State *L) {
static const int mode[] = {SEEK_SET, SEEK_CUR, SEEK_END}; static const int mode[] = {SEEK_SET, SEEK_CUR, SEEK_END};
static const char *const modenames[] = {"set", "cur", "end", NULL}; static const char *const modenames[] = {"set", "cur", "end", NULL};
int f = *tofile(L); FILE *f = tofile(L);
int op = luaL_checkoption(L, 2, "cur", modenames); int op = luaL_checkoption(L, 2, "cur", modenames);
long offset = luaL_optlong(L, 3, 0); lua_Number p3 = luaL_optnumber(L, 3, 0);
op = rb->lseek(f, offset, mode[op]); l_seeknum offset = (l_seeknum)p3;
luaL_argcheck(L, (lua_Number)offset == p3, 3,
"not an integer in proper range");
op = rb->lseek((int)f, offset, mode[op]);
if (op) if (op)
return pushresult(L, 0, NULL); /* error */ return luaL_fileresult(L, 0, NULL); /* error */
else { else {
lua_pushinteger(L, rb->lseek(f, 0, SEEK_CUR)); lua_pushnumber(L, (lua_Number)rb->lseek((int)f, 0, SEEK_CUR));
return 1; return 1;
} }
} }
#if 0
static int f_setvbuf (lua_State *L) {
static const int mode[] = {_IONBF, _IOFBF, _IOLBF};
static const char *const modenames[] = {"no", "full", "line", NULL};
FILE *f = tofile(L);
int op = luaL_checkoption(L, 2, NULL, modenames);
lua_Integer sz = luaL_optinteger(L, 3, LUAL_BUFFERSIZE);
int res = setvbuf(f, NULL, mode[op], sz);
return luaL_fileresult(L, res == 0, NULL);
}
static int io_flush (lua_State *L) {
return luaL_fileresult(L, fflush(getiofile(L, IO_OUTPUT)) == 0, NULL);
}
static int f_flush (lua_State *L) {
return luaL_fileresult(L, fflush(tofile(L)) == 0, NULL);
}
#endif
/*
** functions for 'io' library
*/
static const luaL_Reg iolib[] = { static const luaL_Reg iolib[] = {
{"close", io_close}, {"close", io_close},
/*{"flush", io_flush},*/
{"input", io_input}, {"input", io_input},
{"lines", io_lines}, {"lines", io_lines},
{"open", io_open}, {"open", io_open},
{"output", io_output}, {"output", io_output},
/*{"popen", io_popen},*/
{"read", io_read}, {"read", io_read},
/*{"tmpfile", io_tmpfile},*/
{"type", io_type}, {"type", io_type},
{"write", io_write}, {"write", io_write},
{NULL, NULL} {NULL, NULL}
}; };
/*
** methods for file handles
*/
static const luaL_Reg flib[] = { static const luaL_Reg flib[] = {
{"close", io_close}, {"close", io_close},
/*{"flush", f_flush},*/
{"lines", f_lines}, {"lines", f_lines},
{"read", f_read}, {"read", f_read},
{"seek", f_seek}, {"seek", f_seek},
/*{"setvbuf", f_setvbuf},*/
{"write", f_write}, {"write", f_write},
{"__gc", io_gc}, {"__gc", f_gc},
{"__tostring", io_tostring}, {"__tostring", f_tostring},
{NULL, NULL} {NULL, NULL}
}; };
@ -453,16 +653,40 @@ static void createmeta (lua_State *L) {
luaL_newmetatable(L, LUA_FILEHANDLE); /* create metatable for file handles */ luaL_newmetatable(L, LUA_FILEHANDLE); /* create metatable for file handles */
lua_pushvalue(L, -1); /* push metatable */ lua_pushvalue(L, -1); /* push metatable */
lua_setfield(L, -2, "__index"); /* metatable.__index = metatable */ lua_setfield(L, -2, "__index"); /* metatable.__index = metatable */
luaL_register(L, NULL, flib); /* file methods */ luaL_setfuncs(L, flib, 0); /* add file methods to new metatable */
lua_pop(L, 1); /* pop new metatable */
} }
LUALIB_API int luaopen_io (lua_State *L) { /*
** function to (not) close the standard files stdin, stdout, and stderr
*/
#if 0
static int io_noclose (lua_State *L) {
LStream *p = tolstream(L);
p->closef = &io_noclose; /* keep file opened */
lua_pushnil(L);
lua_pushliteral(L, "cannot close standard file");
return 2;
}
static void createstdfile (lua_State *L, FILE *f, const char *k,
const char *fname) {
LStream *p = newprefile(L);
p->f = f;
p->closef = &io_noclose;
if (k != NULL) {
lua_pushvalue(L, -1);
lua_setfield(L, LUA_REGISTRYINDEX, k); /* add file to registry */
}
lua_setfield(L, -2, fname); /* add file to module */
}
#endif
LUAMOD_API int luaopen_io (lua_State *L) {
luaL_newlib(L, iolib); /* new module */
createmeta(L); createmeta(L);
lua_replace(L, LUA_ENVIRONINDEX);
/* open library */
luaL_register(L, LUA_IOLIBNAME, iolib);
/* create (and set) default files */ /* create (and set) default files */
lua_pop(L, 1); /* pop environment for default files */
return 1; return 1;
} }

View file

@ -1,12 +1,10 @@
/* /*
** $Id: llex.c,v 2.20.1.1 2007/12/27 13:02:25 roberto Exp $ ** $Id: llex.c,v 2.63.1.2 2013/08/30 15:49:41 roberto Exp $
** Lexical Analyzer ** Lexical Analyzer
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#include <ctype.h>
/* #include <locale.h> */
#include <string.h> #include <string.h>
#define llex_c #define llex_c
@ -14,6 +12,7 @@
#include "lua.h" #include "lua.h"
#include "lctype.h"
#include "ldo.h" #include "ldo.h"
#include "llex.h" #include "llex.h"
#include "lobject.h" #include "lobject.h"
@ -29,35 +28,36 @@
#define currIsNewline(ls) (ls->current == '\n' || ls->current == '\r') #define currIsNewline(ls) (ls->current == '\n' || ls->current == '\r')
/* ORDER RESERVED */ /* ORDER RESERVED */
const char *const luaX_tokens [] = { static const char *const luaX_tokens [] = {
"and", "break", "do", "else", "elseif", "and", "break", "do", "else", "elseif",
"end", "false", "for", "function", "if", "end", "false", "for", "function", "goto", "if",
"in", "local", "nil", "not", "or", "repeat", "in", "local", "nil", "not", "or", "repeat",
"return", "then", "true", "until", "while", "return", "then", "true", "until", "while",
"..", "...", "==", ">=", "<=", "~=", "..", "...", "==", ">=", "<=", "~=", "::", "<eof>",
"<number>", "<name>", "<string>", "<eof>", "<number>", "<name>", "<string>"
NULL
}; };
#define save_and_next(ls) (save(ls, ls->current), next(ls)) #define save_and_next(ls) (save(ls, ls->current), next(ls))
static l_noret lexerror (LexState *ls, const char *msg, int token);
static void save (LexState *ls, int c) { static void save (LexState *ls, int c) {
Mbuffer *b = ls->buff; Mbuffer *b = ls->buff;
if (b->n + 1 > b->buffsize) { if (luaZ_bufflen(b) + 1 > luaZ_sizebuffer(b)) {
size_t newsize; size_t newsize;
if (b->buffsize >= MAX_SIZET/2) if (luaZ_sizebuffer(b) >= MAX_SIZET/2)
luaX_lexerror(ls, "lexical element too long", 0); lexerror(ls, "lexical element too long", 0);
newsize = b->buffsize * 2; newsize = luaZ_sizebuffer(b) * 2;
luaZ_resizebuffer(ls->L, b, newsize); luaZ_resizebuffer(ls->L, b, newsize);
} }
b->buffer[b->n++] = cast(char, c); b->buffer[luaZ_bufflen(b)++] = cast(char, c);
} }
@ -66,23 +66,24 @@ void luaX_init (lua_State *L) {
for (i=0; i<NUM_RESERVED; i++) { for (i=0; i<NUM_RESERVED; i++) {
TString *ts = luaS_new(L, luaX_tokens[i]); TString *ts = luaS_new(L, luaX_tokens[i]);
luaS_fix(ts); /* reserved words are never collected */ luaS_fix(ts); /* reserved words are never collected */
lua_assert(strlen(luaX_tokens[i])+1 <= TOKEN_LEN); ts->tsv.extra = cast_byte(i+1); /* reserved word */
ts->tsv.reserved = cast_byte(i+1); /* reserved word */
} }
} }
#define MAXSRC 80
const char *luaX_token2str (LexState *ls, int token) { const char *luaX_token2str (LexState *ls, int token) {
if (token < FIRST_RESERVED) { if (token < FIRST_RESERVED) { /* single-byte symbols? */
lua_assert(token == cast(unsigned char, token)); lua_assert(token == cast(unsigned char, token));
return (iscntrl(token)) ? luaO_pushfstring(ls->L, "char(%d)", token) : return (lisprint(token)) ? luaO_pushfstring(ls->L, LUA_QL("%c"), token) :
luaO_pushfstring(ls->L, "%c", token); luaO_pushfstring(ls->L, "char(%d)", token);
}
else {
const char *s = luaX_tokens[token - FIRST_RESERVED];
if (token < TK_EOS) /* fixed format (symbols and reserved words)? */
return luaO_pushfstring(ls->L, LUA_QS, s);
else /* names, strings, and numerals */
return s;
} }
else
return luaX_tokens[token-FIRST_RESERVED];
} }
@ -92,38 +93,57 @@ static const char *txtToken (LexState *ls, int token) {
case TK_STRING: case TK_STRING:
case TK_NUMBER: case TK_NUMBER:
save(ls, '\0'); save(ls, '\0');
return luaZ_buffer(ls->buff); return luaO_pushfstring(ls->L, LUA_QS, luaZ_buffer(ls->buff));
default: default:
return luaX_token2str(ls, token); return luaX_token2str(ls, token);
} }
} }
void luaX_lexerror (LexState *ls, const char *msg, int token) { static l_noret lexerror (LexState *ls, const char *msg, int token) {
char buff[MAXSRC]; char buff[LUA_IDSIZE];
luaO_chunkid(buff, getstr(ls->source), MAXSRC); luaO_chunkid(buff, getstr(ls->source), LUA_IDSIZE);
msg = luaO_pushfstring(ls->L, "%s:%d: %s", buff, ls->linenumber, msg); msg = luaO_pushfstring(ls->L, "%s:%d: %s", buff, ls->linenumber, msg);
if (token) if (token)
luaO_pushfstring(ls->L, "%s near " LUA_QS, msg, txtToken(ls, token)); luaO_pushfstring(ls->L, "%s near %s", msg, txtToken(ls, token));
luaD_throw(ls->L, LUA_ERRSYNTAX); luaD_throw(ls->L, LUA_ERRSYNTAX);
} }
void luaX_syntaxerror (LexState *ls, const char *msg) { l_noret luaX_syntaxerror (LexState *ls, const char *msg) {
luaX_lexerror(ls, msg, ls->t.token); lexerror(ls, msg, ls->t.token);
} }
/*
** creates a new string and anchors it in function's table so that
** it will not be collected until the end of the function's compilation
** (by that time it should be anchored in function's prototype)
*/
TString *luaX_newstring (LexState *ls, const char *str, size_t l) { TString *luaX_newstring (LexState *ls, const char *str, size_t l) {
lua_State *L = ls->L; lua_State *L = ls->L;
TString *ts = luaS_newlstr(L, str, l); TValue *o; /* entry for `str' */
TValue *o = luaH_setstr(L, ls->fs->h, ts); /* entry for `str' */ TString *ts = luaS_newlstr(L, str, l); /* create new string */
if (ttisnil(o)) setsvalue2s(L, L->top++, ts); /* temporarily anchor it in stack */
setbvalue(o, 1); /* make sure `str' will not be collected */ o = luaH_set(L, ls->fs->h, L->top - 1);
if (ttisnil(o)) { /* not in use yet? (see 'addK') */
/* boolean value does not need GC barrier;
table has no metatable, so it does not need to invalidate cache */
setbvalue(o, 1); /* t[string] = true */
luaC_checkGC(L);
}
else { /* string already present */
ts = rawtsvalue(keyfromval(o)); /* re-use value previously stored */
}
L->top--; /* remove string from stack */
return ts; return ts;
} }
/*
** increment line number and skips newline sequence (any of
** \n, \r, \n\r, or \r\n)
*/
static void inclinenumber (LexState *ls) { static void inclinenumber (LexState *ls) {
int old = ls->current; int old = ls->current;
lua_assert(currIsNewline(ls)); lua_assert(currIsNewline(ls));
@ -135,17 +155,20 @@ static void inclinenumber (LexState *ls) {
} }
void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source) { void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source,
int firstchar) {
ls->decpoint = '.'; ls->decpoint = '.';
ls->L = L; ls->L = L;
ls->current = firstchar;
ls->lookahead.token = TK_EOS; /* no look-ahead token */ ls->lookahead.token = TK_EOS; /* no look-ahead token */
ls->z = z; ls->z = z;
ls->fs = NULL; ls->fs = NULL;
ls->linenumber = 1; ls->linenumber = 1;
ls->lastline = 1; ls->lastline = 1;
ls->source = source; ls->source = source;
ls->envn = luaS_new(L, LUA_ENV); /* create env name */
luaS_fix(ls->envn); /* never collect this name */
luaZ_resizebuffer(ls->L, ls->buff, LUA_MINBUFFER); /* initialize buffer */ luaZ_resizebuffer(ls->L, ls->buff, LUA_MINBUFFER); /* initialize buffer */
next(ls); /* read first char */
} }
@ -159,13 +182,16 @@ void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source) {
static int check_next (LexState *ls, const char *set) { static int check_next (LexState *ls, const char *set) {
if (!strchr(set, ls->current)) if (ls->current == '\0' || !strchr(set, ls->current))
return 0; return 0;
save_and_next(ls); save_and_next(ls);
return 1; return 1;
} }
/*
** change all characters 'from' in buffer to 'to'
*/
static void buffreplace (LexState *ls, char from, char to) { static void buffreplace (LexState *ls, char from, char to) {
size_t n = luaZ_bufflen(ls->buff); size_t n = luaZ_bufflen(ls->buff);
char *p = luaZ_buffer(ls->buff); char *p = luaZ_buffer(ls->buff);
@ -174,37 +200,59 @@ static void buffreplace (LexState *ls, char from, char to) {
} }
#if !defined(getlocaledecpoint)
#define getlocaledecpoint() (localeconv()->decimal_point[0])
#endif
#define buff2d(b,e) luaO_str2d(luaZ_buffer(b), luaZ_bufflen(b) - 1, e)
/*
** in case of format error, try to change decimal point separator to
** the one defined in the current locale and check again
*/
static void trydecpoint (LexState *ls, SemInfo *seminfo) { static void trydecpoint (LexState *ls, SemInfo *seminfo) {
/* format error: try to update decimal point separator */
/* struct lconv *cv = localeconv(); */
char old = ls->decpoint; char old = ls->decpoint;
ls->decpoint = '.'; /* (cv ? cv->decimal_point[0] : '.'); */ ls->decpoint = getlocaledecpoint();
buffreplace(ls, old, ls->decpoint); /* try updated decimal separator */ buffreplace(ls, old, ls->decpoint); /* try new decimal separator */
if (!luaO_str2d(luaZ_buffer(ls->buff), &seminfo->r)) { if (!buff2d(ls->buff, &seminfo->r)) {
/* format error with correct decimal point: no more options */ /* format error with correct decimal point: no more options */
buffreplace(ls, ls->decpoint, '.'); /* undo change (for error message) */ buffreplace(ls, ls->decpoint, '.'); /* undo change (for error message) */
luaX_lexerror(ls, "malformed number", TK_NUMBER); lexerror(ls, "malformed number", TK_NUMBER);
} }
} }
/* LUA_NUMBER */ /* LUA_NUMBER */
/*
** this function is quite liberal in what it accepts, as 'luaO_str2d'
** will reject ill-formed numerals.
*/
static void read_numeral (LexState *ls, SemInfo *seminfo) { static void read_numeral (LexState *ls, SemInfo *seminfo) {
lua_assert(isdigit(ls->current)); const char *expo = "Ee";
do { int first = ls->current;
save_and_next(ls); lua_assert(lisdigit(ls->current));
} while (isdigit(ls->current) || ls->current == '.'); save_and_next(ls);
if (check_next(ls, "Ee")) /* `E'? */ if (first == '0' && check_next(ls, "Xx")) /* hexadecimal? */
check_next(ls, "+-"); /* optional exponent sign */ expo = "Pp";
while (isalnum(ls->current) || ls->current == '_') for (;;) {
save_and_next(ls); if (check_next(ls, expo)) /* exponent part? */
check_next(ls, "+-"); /* optional exponent sign */
if (lisxdigit(ls->current) || ls->current == '.')
save_and_next(ls);
else break;
}
save(ls, '\0'); save(ls, '\0');
buffreplace(ls, '.', ls->decpoint); /* follow locale for decimal point */ buffreplace(ls, '.', ls->decpoint); /* follow locale for decimal point */
if (!luaO_str2d(luaZ_buffer(ls->buff), &seminfo->r)) /* format error? */ if (!buff2d(ls->buff, &seminfo->r)) /* format error? */
trydecpoint(ls, seminfo); /* try to update decimal point separator */ trydecpoint(ls, seminfo); /* try to update decimal point separator */
} }
/*
** skip a sequence '[=*[' or ']=*]' and return its number of '='s or
** -1 if sequence is malformed
*/
static int skip_sep (LexState *ls) { static int skip_sep (LexState *ls) {
int count = 0; int count = 0;
int s = ls->current; int s = ls->current;
@ -219,43 +267,23 @@ static int skip_sep (LexState *ls) {
static void read_long_string (LexState *ls, SemInfo *seminfo, int sep) { static void read_long_string (LexState *ls, SemInfo *seminfo, int sep) {
int cont = 0;
(void)(cont); /* avoid warnings when `cont' is not used */
save_and_next(ls); /* skip 2nd `[' */ save_and_next(ls); /* skip 2nd `[' */
if (currIsNewline(ls)) /* string starts with a newline? */ if (currIsNewline(ls)) /* string starts with a newline? */
inclinenumber(ls); /* skip it */ inclinenumber(ls); /* skip it */
for (;;) { for (;;) {
switch (ls->current) { switch (ls->current) {
case EOZ: case EOZ:
luaX_lexerror(ls, (seminfo) ? "unfinished long string" : lexerror(ls, (seminfo) ? "unfinished long string" :
"unfinished long comment", TK_EOS); "unfinished long comment", TK_EOS);
break; /* to avoid warnings */ break; /* to avoid warnings */
#if defined(LUA_COMPAT_LSTR)
case '[': {
if (skip_sep(ls) == sep) {
save_and_next(ls); /* skip 2nd `[' */
cont++;
#if LUA_COMPAT_LSTR == 1
if (sep == 0)
luaX_lexerror(ls, "nesting of [[...]] is deprecated", '[');
#endif
}
break;
}
#endif
case ']': { case ']': {
if (skip_sep(ls) == sep) { if (skip_sep(ls) == sep) {
save_and_next(ls); /* skip 2nd `]' */ save_and_next(ls); /* skip 2nd `]' */
#if defined(LUA_COMPAT_LSTR) && LUA_COMPAT_LSTR == 2
cont--;
if (sep == 0 && cont >= 0) break;
#endif
goto endloop; goto endloop;
} }
break; break;
} }
case '\n': case '\n': case '\r': {
case '\r': {
save(ls, '\n'); save(ls, '\n');
inclinenumber(ls); inclinenumber(ls);
if (!seminfo) luaZ_resetbuffer(ls->buff); /* avoid wasting space */ if (!seminfo) luaZ_resetbuffer(ls->buff); /* avoid wasting space */
@ -273,51 +301,91 @@ static void read_long_string (LexState *ls, SemInfo *seminfo, int sep) {
} }
static void escerror (LexState *ls, int *c, int n, const char *msg) {
int i;
luaZ_resetbuffer(ls->buff); /* prepare error message */
save(ls, '\\');
for (i = 0; i < n && c[i] != EOZ; i++)
save(ls, c[i]);
lexerror(ls, msg, TK_STRING);
}
static int readhexaesc (LexState *ls) {
int c[3], i; /* keep input for error message */
int r = 0; /* result accumulator */
c[0] = 'x'; /* for error message */
for (i = 1; i < 3; i++) { /* read two hexadecimal digits */
c[i] = next(ls);
if (!lisxdigit(c[i]))
escerror(ls, c, i + 1, "hexadecimal digit expected");
r = (r << 4) + luaO_hexavalue(c[i]);
}
return r;
}
static int readdecesc (LexState *ls) {
int c[3], i;
int r = 0; /* result accumulator */
for (i = 0; i < 3 && lisdigit(ls->current); i++) { /* read up to 3 digits */
c[i] = ls->current;
r = 10*r + c[i] - '0';
next(ls);
}
if (r > UCHAR_MAX)
escerror(ls, c, i, "decimal escape too large");
return r;
}
static void read_string (LexState *ls, int del, SemInfo *seminfo) { static void read_string (LexState *ls, int del, SemInfo *seminfo) {
save_and_next(ls); save_and_next(ls); /* keep delimiter (for error messages) */
while (ls->current != del) { while (ls->current != del) {
switch (ls->current) { switch (ls->current) {
case EOZ: case EOZ:
luaX_lexerror(ls, "unfinished string", TK_EOS); lexerror(ls, "unfinished string", TK_EOS);
continue; /* to avoid warnings */ break; /* to avoid warnings */
case '\n': case '\n':
case '\r': case '\r':
luaX_lexerror(ls, "unfinished string", TK_STRING); lexerror(ls, "unfinished string", TK_STRING);
continue; /* to avoid warnings */ break; /* to avoid warnings */
case '\\': { case '\\': { /* escape sequences */
int c; int c; /* final character to be saved */
next(ls); /* do not save the `\' */ next(ls); /* do not save the `\' */
switch (ls->current) { switch (ls->current) {
case 'a': c = '\a'; break; case 'a': c = '\a'; goto read_save;
case 'b': c = '\b'; break; case 'b': c = '\b'; goto read_save;
case 'f': c = '\f'; break; case 'f': c = '\f'; goto read_save;
case 'n': c = '\n'; break; case 'n': c = '\n'; goto read_save;
case 'r': c = '\r'; break; case 'r': c = '\r'; goto read_save;
case 't': c = '\t'; break; case 't': c = '\t'; goto read_save;
case 'v': c = '\v'; break; case 'v': c = '\v'; goto read_save;
case '\n': /* go through */ case 'x': c = readhexaesc(ls); goto read_save;
case '\r': save(ls, '\n'); inclinenumber(ls); continue; case '\n': case '\r':
case EOZ: continue; /* will raise an error next loop */ inclinenumber(ls); c = '\n'; goto only_save;
default: { case '\\': case '\"': case '\'':
if (!isdigit(ls->current)) c = ls->current; goto read_save;
save_and_next(ls); /* handles \\, \", \', and \? */ case EOZ: goto no_save; /* will raise an error next loop */
else { /* \xxx */ case 'z': { /* zap following span of spaces */
int i = 0; next(ls); /* skip the 'z' */
c = 0; while (lisspace(ls->current)) {
do { if (currIsNewline(ls)) inclinenumber(ls);
c = 10*c + (ls->current-'0'); else next(ls);
next(ls);
} while (++i<3 && isdigit(ls->current));
if (c > UCHAR_MAX)
luaX_lexerror(ls, "escape sequence too large", TK_STRING);
save(ls, c);
} }
continue; goto no_save;
}
default: {
if (!lisdigit(ls->current))
escerror(ls, &ls->current, 1, "invalid escape sequence");
/* digital escape \ddd */
c = readdecesc(ls);
goto only_save;
} }
} }
save(ls, c); read_save: next(ls); /* read next character */
next(ls); only_save: save(ls, c); /* save 'c' */
continue; no_save: break;
} }
default: default:
save_and_next(ls); save_and_next(ls);
@ -333,38 +401,41 @@ static int llex (LexState *ls, SemInfo *seminfo) {
luaZ_resetbuffer(ls->buff); luaZ_resetbuffer(ls->buff);
for (;;) { for (;;) {
switch (ls->current) { switch (ls->current) {
case '\n': case '\n': case '\r': { /* line breaks */
case '\r': {
inclinenumber(ls); inclinenumber(ls);
continue; break;
} }
case '-': { case ' ': case '\f': case '\t': case '\v': { /* spaces */
next(ls);
break;
}
case '-': { /* '-' or '--' (comment) */
next(ls); next(ls);
if (ls->current != '-') return '-'; if (ls->current != '-') return '-';
/* else is a comment */ /* else is a comment */
next(ls); next(ls);
if (ls->current == '[') { if (ls->current == '[') { /* long comment? */
int sep = skip_sep(ls); int sep = skip_sep(ls);
luaZ_resetbuffer(ls->buff); /* `skip_sep' may dirty the buffer */ luaZ_resetbuffer(ls->buff); /* `skip_sep' may dirty the buffer */
if (sep >= 0) { if (sep >= 0) {
read_long_string(ls, NULL, sep); /* long comment */ read_long_string(ls, NULL, sep); /* skip long comment */
luaZ_resetbuffer(ls->buff); luaZ_resetbuffer(ls->buff); /* previous call may dirty the buff. */
continue; break;
} }
} }
/* else short comment */ /* else short comment */
while (!currIsNewline(ls) && ls->current != EOZ) while (!currIsNewline(ls) && ls->current != EOZ)
next(ls); next(ls); /* skip until end of line (or end of file) */
continue; break;
} }
case '[': { case '[': { /* long string or simply '[' */
int sep = skip_sep(ls); int sep = skip_sep(ls);
if (sep >= 0) { if (sep >= 0) {
read_long_string(ls, seminfo, sep); read_long_string(ls, seminfo, sep);
return TK_STRING; return TK_STRING;
} }
else if (sep == -1) return '['; else if (sep == -1) return '[';
else luaX_lexerror(ls, "invalid long string delimiter", TK_STRING); else lexerror(ls, "invalid long string delimiter", TK_STRING);
} }
case '=': { case '=': {
next(ls); next(ls);
@ -386,56 +457,52 @@ static int llex (LexState *ls, SemInfo *seminfo) {
if (ls->current != '=') return '~'; if (ls->current != '=') return '~';
else { next(ls); return TK_NE; } else { next(ls); return TK_NE; }
} }
case '"': case ':': {
case '\'': { next(ls);
if (ls->current != ':') return ':';
else { next(ls); return TK_DBCOLON; }
}
case '"': case '\'': { /* short literal strings */
read_string(ls, ls->current, seminfo); read_string(ls, ls->current, seminfo);
return TK_STRING; return TK_STRING;
} }
case '.': { case '.': { /* '.', '..', '...', or number */
save_and_next(ls); save_and_next(ls);
if (check_next(ls, ".")) { if (check_next(ls, ".")) {
if (check_next(ls, ".")) if (check_next(ls, "."))
return TK_DOTS; /* ... */ return TK_DOTS; /* '...' */
else return TK_CONCAT; /* .. */ else return TK_CONCAT; /* '..' */
}
else if (!isdigit(ls->current)) return '.';
else {
read_numeral(ls, seminfo);
return TK_NUMBER;
} }
else if (!lisdigit(ls->current)) return '.';
/* else go through */
}
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9': {
read_numeral(ls, seminfo);
return TK_NUMBER;
} }
case EOZ: { case EOZ: {
return TK_EOS; return TK_EOS;
} }
default: { default: {
if (isspace(ls->current)) { if (lislalpha(ls->current)) { /* identifier or reserved word? */
lua_assert(!currIsNewline(ls));
next(ls);
continue;
}
else if (isdigit(ls->current)) {
read_numeral(ls, seminfo);
return TK_NUMBER;
}
else if (isalpha(ls->current) || ls->current == '_') {
/* identifier or reserved word */
TString *ts; TString *ts;
do { do {
save_and_next(ls); save_and_next(ls);
} while (isalnum(ls->current) || ls->current == '_'); } while (lislalnum(ls->current));
ts = luaX_newstring(ls, luaZ_buffer(ls->buff), ts = luaX_newstring(ls, luaZ_buffer(ls->buff),
luaZ_bufflen(ls->buff)); luaZ_bufflen(ls->buff));
if (ts->tsv.reserved > 0) /* reserved word? */ seminfo->ts = ts;
return ts->tsv.reserved - 1 + FIRST_RESERVED; if (isreserved(ts)) /* reserved word? */
return ts->tsv.extra - 1 + FIRST_RESERVED;
else { else {
seminfo->ts = ts;
return TK_NAME; return TK_NAME;
} }
} }
else { else { /* single-char tokens (+ - / ...) */
int c = ls->current; int c = ls->current;
next(ls); next(ls);
return c; /* single-char tokens (+ - / ...) */ return c;
} }
} }
} }
@ -454,8 +521,9 @@ void luaX_next (LexState *ls) {
} }
void luaX_lookahead (LexState *ls) { int luaX_lookahead (LexState *ls) {
lua_assert(ls->lookahead.token == TK_EOS); lua_assert(ls->lookahead.token == TK_EOS);
ls->lookahead.token = llex(ls, &ls->lookahead.seminfo); ls->lookahead.token = llex(ls, &ls->lookahead.seminfo);
return ls->lookahead.token;
} }

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: llex.h,v 1.72.1.1 2013/04/12 18:48:47 roberto Exp $
** Lexical Analyzer ** Lexical Analyzer
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -13,8 +13,6 @@
#define FIRST_RESERVED 257 #define FIRST_RESERVED 257
/* maximum length of a reserved word */
#define TOKEN_LEN (sizeof("function")/sizeof(char))
/* /*
@ -25,21 +23,17 @@ enum RESERVED {
/* terminal symbols denoted by reserved words */ /* terminal symbols denoted by reserved words */
TK_AND = FIRST_RESERVED, TK_BREAK, TK_AND = FIRST_RESERVED, TK_BREAK,
TK_DO, TK_ELSE, TK_ELSEIF, TK_END, TK_FALSE, TK_FOR, TK_FUNCTION, TK_DO, TK_ELSE, TK_ELSEIF, TK_END, TK_FALSE, TK_FOR, TK_FUNCTION,
TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT, TK_GOTO, TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT,
TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE, TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE,
/* other terminal symbols */ /* other terminal symbols */
TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE, TK_NUMBER, TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE, TK_DBCOLON, TK_EOS,
TK_NAME, TK_STRING, TK_EOS TK_NUMBER, TK_NAME, TK_STRING
}; };
/* number of reserved words */ /* number of reserved words */
#define NUM_RESERVED (cast(int, TK_WHILE-FIRST_RESERVED+1)) #define NUM_RESERVED (cast(int, TK_WHILE-FIRST_RESERVED+1))
/* array with token `names' */
LUAI_DATA const char *const luaX_tokens [];
typedef union { typedef union {
lua_Number r; lua_Number r;
TString *ts; TString *ts;
@ -52,29 +46,32 @@ typedef struct Token {
} Token; } Token;
/* state of the lexer plus state of the parser when shared by all
functions */
typedef struct LexState { typedef struct LexState {
int current; /* current character (charint) */ int current; /* current character (charint) */
int linenumber; /* input line counter */ int linenumber; /* input line counter */
int lastline; /* line of last token `consumed' */ int lastline; /* line of last token `consumed' */
Token t; /* current token */ Token t; /* current token */
Token lookahead; /* look ahead token */ Token lookahead; /* look ahead token */
struct FuncState *fs; /* `FuncState' is private to the parser */ struct FuncState *fs; /* current function (parser) */
struct lua_State *L; struct lua_State *L;
ZIO *z; /* input stream */ ZIO *z; /* input stream */
Mbuffer *buff; /* buffer for tokens */ Mbuffer *buff; /* buffer for tokens */
struct Dyndata *dyd; /* dynamic structures used by the parser */
TString *source; /* current source name */ TString *source; /* current source name */
TString *envn; /* environment variable name */
char decpoint; /* locale decimal point */ char decpoint; /* locale decimal point */
} LexState; } LexState;
LUAI_FUNC void luaX_init (lua_State *L); LUAI_FUNC void luaX_init (lua_State *L);
LUAI_FUNC void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, LUAI_FUNC void luaX_setinput (lua_State *L, LexState *ls, ZIO *z,
TString *source); TString *source, int firstchar);
LUAI_FUNC TString *luaX_newstring (LexState *ls, const char *str, size_t l); LUAI_FUNC TString *luaX_newstring (LexState *ls, const char *str, size_t l);
LUAI_FUNC void luaX_next (LexState *ls); LUAI_FUNC void luaX_next (LexState *ls);
LUAI_FUNC void luaX_lookahead (LexState *ls); LUAI_FUNC int luaX_lookahead (LexState *ls);
LUAI_FUNC void luaX_lexerror (LexState *ls, const char *msg, int token); LUAI_FUNC l_noret luaX_syntaxerror (LexState *ls, const char *s);
LUAI_FUNC void luaX_syntaxerror (LexState *ls, const char *s);
LUAI_FUNC const char *luaX_token2str (LexState *ls, int token); LUAI_FUNC const char *luaX_token2str (LexState *ls, int token);

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: llimits.h,v 1.103.1.1 2013/04/12 18:48:47 roberto Exp $
** Limits, basic types, and some other `installation-dependent' definitions ** Limits, basic types, and some other `installation-dependent' definitions
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -15,7 +15,7 @@
#include "lua.h" #include "lua.h"
typedef LUAI_UINT32 lu_int32; typedef unsigned LUA_INT32 lu_int32;
typedef LUAI_UMEM lu_mem; typedef LUAI_UMEM lu_mem;
@ -31,6 +31,8 @@ typedef unsigned char lu_byte;
#define MAX_LUMEM ((lu_mem)(~(lu_mem)0)-2) #define MAX_LUMEM ((lu_mem)(~(lu_mem)0)-2)
#define MAX_LMEM ((l_mem) ((MAX_LUMEM >> 1) - 2))
#define MAX_INT (INT_MAX-2) /* maximum value of an int (-2 for safety) */ #define MAX_INT (INT_MAX-2) /* maximum value of an int (-2 for safety) */
@ -44,6 +46,10 @@ typedef unsigned char lu_byte;
/* type to ensure maximum alignment */ /* type to ensure maximum alignment */
#if !defined(LUAI_USER_ALIGNMENT_T)
#define LUAI_USER_ALIGNMENT_T union { double u; void *s; long l; }
#endif
typedef LUAI_USER_ALIGNMENT_T L_Umaxalign; typedef LUAI_USER_ALIGNMENT_T L_Umaxalign;
@ -52,34 +58,73 @@ typedef LUAI_UACNUMBER l_uacNumber;
/* internal assertions for in-house debugging */ /* internal assertions for in-house debugging */
#ifdef lua_assert #if defined(lua_assert)
#define check_exp(c,e) (lua_assert(c), (e)) #define check_exp(c,e) (lua_assert(c), (e))
#define api_check(l,e) lua_assert(e) /* to avoid problems with conditions too long */
#define lua_longassert(c) { if (!(c)) lua_assert(0); }
#else #else
#define lua_assert(c) ((void)0) #define lua_assert(c) ((void)0)
#define check_exp(c,e) (e) #define check_exp(c,e) (e)
#define api_check luai_apicheck #define lua_longassert(c) ((void)0)
#endif
/*
** assertion for checking API calls
*/
#if !defined(luai_apicheck)
#if defined(LUA_USE_APICHECK)
#include <assert.h>
#define luai_apicheck(L,e) assert(e)
#else
#define luai_apicheck(L,e) lua_assert(e)
#endif
#endif #endif
#define api_check(l,e,msg) luai_apicheck(l,(e) && msg)
#ifndef UNUSED
#if !defined(UNUSED)
#define UNUSED(x) ((void)(x)) /* to avoid warnings */ #define UNUSED(x) ((void)(x)) /* to avoid warnings */
#endif #endif
#ifndef cast
#define cast(t, exp) ((t)(exp)) #define cast(t, exp) ((t)(exp))
#endif
#define cast_byte(i) cast(lu_byte, (i)) #define cast_byte(i) cast(lu_byte, (i))
#define cast_num(i) cast(lua_Number, (i)) #define cast_num(i) cast(lua_Number, (i))
#define cast_int(i) cast(int, (i)) #define cast_int(i) cast(int, (i))
#define cast_uchar(i) cast(unsigned char, (i))
/*
** non-return type
*/
#if defined(__GNUC__)
#define l_noret void __attribute__((noreturn))
#elif defined(_MSC_VER)
#define l_noret void __declspec(noreturn)
#else
#define l_noret void
#endif
/*
** maximum depth for nested C calls and syntactical nested non-terminals
** in a program. (Value must fit in an unsigned short int.)
*/
#if !defined(LUAI_MAXCCALLS)
#define LUAI_MAXCCALLS 200
#endif
/*
** maximum number of upvalues in a closure (both C and Lua). (Value
** must fit in an unsigned char.)
*/
#define MAXUPVAL UCHAR_MAX
/* /*
** type for virtual-machine instructions ** type for virtual-machine instructions
@ -95,34 +140,170 @@ typedef lu_int32 Instruction;
/* minimum size for the string table (must be power of 2) */ /* minimum size for the string table (must be power of 2) */
#ifndef MINSTRTABSIZE #if !defined(MINSTRTABSIZE)
#define MINSTRTABSIZE 32 #define MINSTRTABSIZE 32
#endif #endif
/* minimum size for string buffer */ /* minimum size for string buffer */
#ifndef LUA_MINBUFFER #if !defined(LUA_MINBUFFER)
#define LUA_MINBUFFER 32 #define LUA_MINBUFFER 32
#endif #endif
#ifndef lua_lock #if !defined(lua_lock)
#define lua_lock(L) ((void) 0) #define lua_lock(L) ((void) 0)
#define lua_unlock(L) ((void) 0) #define lua_unlock(L) ((void) 0)
#endif #endif
#ifndef luai_threadyield #if !defined(luai_threadyield)
#define luai_threadyield(L) {lua_unlock(L); lua_lock(L);} #define luai_threadyield(L) {lua_unlock(L); lua_lock(L);}
#endif #endif
/* /*
** macro to control inclusion of some hard tests on stack reallocation ** these macros allow user-specific actions on threads when you defined
*/ ** LUAI_EXTRASPACE and need to do something extra when a thread is
#ifndef HARDSTACKTESTS ** created/deleted/resumed/yielded.
#define condhardstacktests(x) ((void)0) */
#if !defined(luai_userstateopen)
#define luai_userstateopen(L) ((void)L)
#endif
#if !defined(luai_userstateclose)
#define luai_userstateclose(L) ((void)L)
#endif
#if !defined(luai_userstatethread)
#define luai_userstatethread(L,L1) ((void)L)
#endif
#if !defined(luai_userstatefree)
#define luai_userstatefree(L,L1) ((void)L)
#endif
#if !defined(luai_userstateresume)
#define luai_userstateresume(L,n) ((void)L)
#endif
#if !defined(luai_userstateyield)
#define luai_userstateyield(L,n) ((void)L)
#endif
/*
** lua_number2int is a macro to convert lua_Number to int.
** lua_number2integer is a macro to convert lua_Number to lua_Integer.
** lua_number2unsigned is a macro to convert a lua_Number to a lua_Unsigned.
** lua_unsigned2number is a macro to convert a lua_Unsigned to a lua_Number.
** luai_hashnum is a macro to hash a lua_Number value into an integer.
** The hash must be deterministic and give reasonable values for
** both small and large values (outside the range of integers).
*/
#if defined(MS_ASMTRICK) || defined(LUA_MSASMTRICK) /* { */
/* trick with Microsoft assembler for X86 */
#define lua_number2int(i,n) __asm {__asm fld n __asm fistp i}
#define lua_number2integer(i,n) lua_number2int(i, n)
#define lua_number2unsigned(i,n) \
{__int64 l; __asm {__asm fld n __asm fistp l} i = (unsigned int)l;}
#elif defined(LUA_IEEE754TRICK) /* }{ */
/* the next trick should work on any machine using IEEE754 with
a 32-bit int type */
union luai_Cast { double l_d; LUA_INT32 l_p[2]; };
#if !defined(LUA_IEEEENDIAN) /* { */
#define LUAI_EXTRAIEEE \
static const union luai_Cast ieeeendian = {-(33.0 + 6755399441055744.0)};
#define LUA_IEEEENDIANLOC (ieeeendian.l_p[1] == 33)
#else #else
#define condhardstacktests(x) x #define LUA_IEEEENDIANLOC LUA_IEEEENDIAN
#define LUAI_EXTRAIEEE /* empty */
#endif /* } */
#define lua_number2int32(i,n,t) \
{ LUAI_EXTRAIEEE \
volatile union luai_Cast u; u.l_d = (n) + 6755399441055744.0; \
(i) = (t)u.l_p[LUA_IEEEENDIANLOC]; }
#define luai_hashnum(i,n) \
{ volatile union luai_Cast u; u.l_d = (n) + 1.0; /* avoid -0 */ \
(i) = u.l_p[0]; (i) += u.l_p[1]; } /* add double bits for his hash */
#define lua_number2int(i,n) lua_number2int32(i, n, int)
#define lua_number2unsigned(i,n) lua_number2int32(i, n, lua_Unsigned)
/* the trick can be expanded to lua_Integer when it is a 32-bit value */
#if defined(LUA_IEEELL)
#define lua_number2integer(i,n) lua_number2int32(i, n, lua_Integer)
#endif
#endif /* } */
/* the following definitions always work, but may be slow */
#if !defined(lua_number2int)
#define lua_number2int(i,n) ((i)=(int)(n))
#endif
#if !defined(lua_number2integer)
#define lua_number2integer(i,n) ((i)=(lua_Integer)(n))
#endif
#if !defined(lua_number2unsigned) /* { */
/* the following definition assures proper modulo behavior */
#if defined(LUA_NUMBER_DOUBLE) || defined(LUA_NUMBER_FLOAT)
#include <math.h>
#define SUPUNSIGNED ((lua_Number)(~(lua_Unsigned)0) + 1)
#define lua_number2unsigned(i,n) \
((i)=(lua_Unsigned)((n) - floor((n)/SUPUNSIGNED)*SUPUNSIGNED))
#else
#define lua_number2unsigned(i,n) ((i)=(lua_Unsigned)(n))
#endif
#endif /* } */
#if !defined(lua_unsigned2number)
/* on several machines, coercion from unsigned to double is slow,
so it may be worth to avoid */
#define lua_unsigned2number(u) \
(((u) <= (lua_Unsigned)INT_MAX) ? (lua_Number)(int)(u) : (lua_Number)(u))
#endif
#if defined(ltable_c) && !defined(luai_hashnum)
#include <float.h>
#include <math.h>
#define luai_hashnum(i,n) { int e; \
n = l_mathop(frexp)(n, &e) * (lua_Number)(INT_MAX - DBL_MAX_EXP); \
lua_number2int(i, n); i += e; }
#endif
/*
** macro to control inclusion of some hard tests on stack reallocation
*/
#if !defined(HARDSTACKTESTS)
#define condmovestack(L) ((void)0)
#else
/* realloc stack keeping its size */
#define condmovestack(L) luaD_reallocstack((L), (L)->stacksize)
#endif
#if !defined(HARDMEMTESTS)
#define condchangemem(L) condmovestack(L)
#else
#define condchangemem(L) \
((void)(!(G(L)->gcrunning) || (luaC_fullgc(L, 0), 1)))
#endif #endif
#endif #endif

View file

@ -1,14 +1,12 @@
/* /*
** $Id: lmathlib.c,v 1.67.1.1 2007/12/27 13:02:25 roberto Exp $ ** $Id: lmathlib.c,v 1.83.1.1 2013/04/12 18:48:47 roberto Exp $
** Standard mathematical library ** Standard mathematical library
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#if 0
#include <stdlib.h> #include <stdlib.h>
#include <math.h> #include <math.h>
#endif
#define lmathlib_c #define lmathlib_c
#define LUA_LIB #define LUA_LIB
@ -20,9 +18,9 @@
#undef PI #undef PI
#define PI (3.14159265358979323846) #define PI ((lua_Number)(3.1415926535897932384626433832795))
#define RADIANS_PER_DEGREE (PI/180.0) #define RADIANS_PER_DEGREE ((lua_Number)(PI/180.0))
#define DEGREES_PER_RADIAN (180.0/PI) #define DEGREES_PER_RADIAN ((lua_Number)180.0/PI)
static int math_abs (lua_State *L) { static int math_abs (lua_State *L) {
@ -34,52 +32,53 @@ static int math_abs (lua_State *L) {
#if 0 #if 0
static int math_sin (lua_State *L) { static int math_sin (lua_State *L) {
lua_pushnumber(L, sin(luaL_checknumber(L, 1))); lua_pushnumber(L, l_mathop(sin)(luaL_checknumber(L, 1)));
return 1; return 1;
} }
static int math_sinh (lua_State *L) { static int math_sinh (lua_State *L) {
lua_pushnumber(L, sinh(luaL_checknumber(L, 1))); lua_pushnumber(L, l_mathop(sinh)(luaL_checknumber(L, 1)));
return 1; return 1;
} }
static int math_cos (lua_State *L) { static int math_cos (lua_State *L) {
lua_pushnumber(L, cos(luaL_checknumber(L, 1))); lua_pushnumber(L, l_mathop(cos)(luaL_checknumber(L, 1)));
return 1; return 1;
} }
static int math_cosh (lua_State *L) { static int math_cosh (lua_State *L) {
lua_pushnumber(L, cosh(luaL_checknumber(L, 1))); lua_pushnumber(L, l_mathop(cosh)(luaL_checknumber(L, 1)));
return 1; return 1;
} }
static int math_tan (lua_State *L) { static int math_tan (lua_State *L) {
lua_pushnumber(L, tan(luaL_checknumber(L, 1))); lua_pushnumber(L, l_mathop(tan)(luaL_checknumber(L, 1)));
return 1; return 1;
} }
static int math_tanh (lua_State *L) { static int math_tanh (lua_State *L) {
lua_pushnumber(L, tanh(luaL_checknumber(L, 1))); lua_pushnumber(L, l_mathop(tanh)(luaL_checknumber(L, 1)));
return 1; return 1;
} }
static int math_asin (lua_State *L) { static int math_asin (lua_State *L) {
lua_pushnumber(L, asin(luaL_checknumber(L, 1))); lua_pushnumber(L, l_mathop(asin)(luaL_checknumber(L, 1)));
return 1; return 1;
} }
static int math_acos (lua_State *L) { static int math_acos (lua_State *L) {
lua_pushnumber(L, acos(luaL_checknumber(L, 1))); lua_pushnumber(L, l_mathop(acos)(luaL_checknumber(L, 1)));
return 1; return 1;
} }
static int math_atan (lua_State *L) { static int math_atan (lua_State *L) {
lua_pushnumber(L, atan(luaL_checknumber(L, 1))); lua_pushnumber(L, l_mathop(atan)(luaL_checknumber(L, 1)));
return 1; return 1;
} }
static int math_atan2 (lua_State *L) { static int math_atan2 (lua_State *L) {
lua_pushnumber(L, atan2(luaL_checknumber(L, 1), luaL_checknumber(L, 2))); lua_pushnumber(L, l_mathop(atan2)(luaL_checknumber(L, 1),
luaL_checknumber(L, 2)));
return 1; return 1;
} }
#endif #endif
@ -104,35 +103,48 @@ static int math_fmod (lua_State *L) {
#if 0 #if 0
static int math_modf (lua_State *L) { static int math_modf (lua_State *L) {
double ip; lua_Number ip;
double fp = modf(luaL_checknumber(L, 1), &ip); lua_Number fp = l_mathop(modf)(luaL_checknumber(L, 1), &ip);
lua_pushnumber(L, ip); lua_pushnumber(L, ip);
lua_pushnumber(L, fp); lua_pushnumber(L, fp);
return 2; return 2;
} }
static int math_sqrt (lua_State *L) { static int math_sqrt (lua_State *L) {
lua_pushnumber(L, sqrt(luaL_checknumber(L, 1))); lua_pushnumber(L, l_mathop(sqrt)(luaL_checknumber(L, 1)));
return 1; return 1;
} }
static int math_pow (lua_State *L) { static int math_pow (lua_State *L) {
lua_pushnumber(L, pow(luaL_checknumber(L, 1), luaL_checknumber(L, 2))); lua_Number x = luaL_checknumber(L, 1);
lua_Number y = luaL_checknumber(L, 2);
lua_pushnumber(L, l_mathop(pow)(x, y));
return 1; return 1;
} }
static int math_log (lua_State *L) { static int math_log (lua_State *L) {
lua_pushnumber(L, log(luaL_checknumber(L, 1))); lua_Number x = luaL_checknumber(L, 1);
lua_Number res;
if (lua_isnoneornil(L, 2))
res = l_mathop(log)(x);
else {
lua_Number base = luaL_checknumber(L, 2);
if (base == (lua_Number)10.0) res = l_mathop(log10)(x);
else res = l_mathop(log)(x)/l_mathop(log)(base);
}
lua_pushnumber(L, res);
return 1; return 1;
} }
#if defined(LUA_COMPAT_LOG10)
static int math_log10 (lua_State *L) { static int math_log10 (lua_State *L) {
lua_pushnumber(L, log10(luaL_checknumber(L, 1))); lua_pushnumber(L, l_mathop(log10)(luaL_checknumber(L, 1)));
return 1; return 1;
} }
#endif
static int math_exp (lua_State *L) { static int math_exp (lua_State *L) {
lua_pushnumber(L, exp(luaL_checknumber(L, 1))); lua_pushnumber(L, l_mathop(exp)(luaL_checknumber(L, 1)));
return 1; return 1;
} }
#endif #endif
@ -140,6 +152,7 @@ static int math_deg (lua_State *L) {
lua_pushnumber(L, luaL_checknumber(L, 1)*DEGREES_PER_RADIAN); lua_pushnumber(L, luaL_checknumber(L, 1)*DEGREES_PER_RADIAN);
return 1; return 1;
} }
static int math_rad (lua_State *L) { static int math_rad (lua_State *L) {
lua_pushnumber(L, (luaL_checknumber(L, 1)*100)/(DEGREES_PER_RADIAN*100)); lua_pushnumber(L, (luaL_checknumber(L, 1)*100)/(DEGREES_PER_RADIAN*100));
return 1; return 1;
@ -148,13 +161,15 @@ static int math_rad (lua_State *L) {
#if 0 #if 0
static int math_frexp (lua_State *L) { static int math_frexp (lua_State *L) {
int e; int e;
lua_pushnumber(L, frexp(luaL_checknumber(L, 1), &e)); lua_pushnumber(L, l_mathop(frexp)(luaL_checknumber(L, 1), &e));
lua_pushinteger(L, e); lua_pushinteger(L, e);
return 2; return 2;
} }
static int math_ldexp (lua_State *L) { static int math_ldexp (lua_State *L) {
lua_pushnumber(L, ldexp(luaL_checknumber(L, 1), luaL_checkint(L, 2))); lua_Number x = luaL_checknumber(L, 1);
int ep = luaL_checkint(L, 2);
lua_pushnumber(L, l_mathop(ldexp)(x, ep));
return 1; return 1;
} }
#endif #endif
@ -197,16 +212,16 @@ static int math_random (lua_State *L) {
break; break;
} }
case 1: { /* only upper limit */ case 1: { /* only upper limit */
int u = luaL_checkint(L, 1); lua_Number u = luaL_checknumber(L, 1);
luaL_argcheck(L, 1<=u, 1, "interval is empty"); luaL_argcheck(L, 1 <= u, 1, "interval is empty");
lua_pushnumber(L, r%u+1); /* int between 1 and `u' */ lua_pushnumber(L, r%u+1); /* int between 1 and `u' */
break; break;
} }
case 2: { /* lower and upper limits */ case 2: { /* lower and upper limits */
int l = luaL_checkint(L, 1); lua_Number l = luaL_checknumber(L, 1);
int u = luaL_checkint(L, 2); lua_Number u = luaL_checknumber(L, 2);
luaL_argcheck(L, l<=u, 2, "interval is empty"); luaL_argcheck(L, l <= u, 2, "interval is empty");
lua_pushnumber(L, r%(u-l+1)+l); /* int between `l' and `u' */ lua_pushnumber(L, r%(u-l+1)+l); /* [l, u] */
break; break;
} }
default: return luaL_error(L, "wrong number of arguments"); default: return luaL_error(L, "wrong number of arguments");
@ -216,7 +231,7 @@ static int math_random (lua_State *L) {
static int math_randomseed (lua_State *L) { static int math_randomseed (lua_State *L) {
rb->srand(luaL_checkint(L, 1)); rb->srand(luaL_checkunsigned(L, 1));
return 0; return 0;
} }
@ -243,7 +258,9 @@ static const luaL_Reg mathlib[] = {
#if 0 #if 0
{"frexp", math_frexp}, {"frexp", math_frexp},
{"ldexp", math_ldexp}, {"ldexp", math_ldexp},
#if defined(LUA_COMPAT_LOG10)
{"log10", math_log10}, {"log10", math_log10},
#endif
{"log", math_log}, {"log", math_log},
#endif #endif
{"max", math_max}, {"max", math_max},
@ -259,7 +276,7 @@ static const luaL_Reg mathlib[] = {
{"sinh", math_sinh}, {"sinh", math_sinh},
{"sin", math_sin}, {"sin", math_sin},
{"sqrt", math_sqrt}, {"sqrt", math_sqrt},
{"tanh", math_tanh}, {"tanh", math_tanh},
{"tan", math_tan}, {"tan", math_tan},
#endif #endif
{NULL, NULL} {NULL, NULL}
@ -269,17 +286,14 @@ static const luaL_Reg mathlib[] = {
/* /*
** Open math library ** Open math library
*/ */
LUALIB_API int luaopen_math (lua_State *L) { LUAMOD_API int luaopen_math (lua_State *L) {
luaL_register(L, LUA_MATHLIBNAME, mathlib); luaL_newlib(L, mathlib);
#if 0 /* No use in adding floating point constants when there's no FP */ #if 0 /* No use in adding floating point constants when there's no FP */
lua_pushnumber(L, PI); lua_pushnumber(L, PI);
lua_setfield(L, -2, "pi"); lua_setfield(L, -2, "pi");
lua_pushnumber(L, HUGE_VAL); lua_pushnumber(L, HUGE_VAL);
lua_setfield(L, -2, "huge"); lua_setfield(L, -2, "huge");
#if defined(LUA_COMPAT_MOD)
lua_getfield(L, -1, "fmod");
lua_setfield(L, -2, "mod");
#endif
#endif #endif
return 1; return 1;
} }

View file

@ -1,5 +1,5 @@
/* /*
** $Id: lmem.c,v 1.70.1.1 2007/12/27 13:02:25 roberto Exp $ ** $Id: lmem.c,v 1.84.1.1 2013/04/12 18:48:47 roberto Exp $
** Interface to Memory Manager ** Interface to Memory Manager
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -14,6 +14,7 @@
#include "ldebug.h" #include "ldebug.h"
#include "ldo.h" #include "ldo.h"
#include "lgc.h"
#include "lmem.h" #include "lmem.h"
#include "lobject.h" #include "lobject.h"
#include "lstate.h" #include "lstate.h"
@ -25,12 +26,11 @@
** void * frealloc (void *ud, void *ptr, size_t osize, size_t nsize); ** void * frealloc (void *ud, void *ptr, size_t osize, size_t nsize);
** (`osize' is the old size, `nsize' is the new size) ** (`osize' is the old size, `nsize' is the new size)
** **
** Lua ensures that (ptr == NULL) iff (osize == 0). ** * frealloc(ud, NULL, x, s) creates a new block of size `s' (no
** ** matter 'x').
** * frealloc(ud, NULL, 0, x) creates a new block of size `x'
** **
** * frealloc(ud, p, x, 0) frees the block `p' ** * frealloc(ud, p, x, 0) frees the block `p'
** (in this specific case, frealloc must return NULL). ** (in this specific case, frealloc must return NULL);
** particularly, frealloc(ud, NULL, 0, 0) does nothing ** particularly, frealloc(ud, NULL, 0, 0) does nothing
** (which is equivalent to free(NULL) in ANSI C) ** (which is equivalent to free(NULL) in ANSI C)
** **
@ -44,12 +44,12 @@
void *luaM_growaux_ (lua_State *L, void *block, int *size, size_t size_elems, void *luaM_growaux_ (lua_State *L, void *block, int *size, size_t size_elems,
int limit, const char *errormsg) { int limit, const char *what) {
void *newblock; void *newblock;
int newsize; int newsize;
if (*size >= limit/2) { /* cannot double it? */ if (*size >= limit/2) { /* cannot double it? */
if (*size >= limit) /* cannot grow even a little? */ if (*size >= limit) /* cannot grow even a little? */
luaG_runerror(L, errormsg); luaG_runerror(L, "too many %s (limit is %d)", what, limit);
newsize = limit; /* still have at least one free place */ newsize = limit; /* still have at least one free place */
} }
else { else {
@ -63,9 +63,8 @@ void *luaM_growaux_ (lua_State *L, void *block, int *size, size_t size_elems,
} }
void *luaM_toobig (lua_State *L) { l_noret luaM_toobig (lua_State *L) {
luaG_runerror(L, "memory allocation error: block too big"); luaG_runerror(L, "memory allocation error: block too big");
return NULL; /* to avoid warnings */
} }
@ -74,13 +73,27 @@ void *luaM_toobig (lua_State *L) {
** generic allocation routine. ** generic allocation routine.
*/ */
void *luaM_realloc_ (lua_State *L, void *block, size_t osize, size_t nsize) { void *luaM_realloc_ (lua_State *L, void *block, size_t osize, size_t nsize) {
void *newblock;
global_State *g = G(L); global_State *g = G(L);
lua_assert((osize == 0) == (block == NULL)); size_t realosize = (block) ? osize : 0;
block = (*g->frealloc)(g->ud, block, osize, nsize); lua_assert((realosize == 0) == (block == NULL));
if (block == NULL && nsize > 0) #if defined(HARDMEMTESTS)
luaD_throw(L, LUA_ERRMEM); if (nsize > realosize && g->gcrunning)
lua_assert((nsize == 0) == (block == NULL)); luaC_fullgc(L, 1); /* force a GC whenever possible */
g->totalbytes = (g->totalbytes - osize) + nsize; #endif
return block; newblock = (*g->frealloc)(g->ud, block, osize, nsize);
if (newblock == NULL && nsize > 0) {
api_check(L, nsize > realosize,
"realloc cannot fail when shrinking a block");
if (g->gcrunning) {
luaC_fullgc(L, 1); /* try to free some memory... */
newblock = (*g->frealloc)(g->ud, block, osize, nsize); /* try again */
}
if (newblock == NULL)
luaD_throw(L, LUA_ERRMEM);
}
lua_assert((nsize == 0) == (newblock == NULL));
g->GCdebt = (g->GCdebt + nsize) - realosize;
return newblock;
} }

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: lmem.h,v 1.40.1.1 2013/04/12 18:48:47 roberto Exp $
** Interface to Memory Manager ** Interface to Memory Manager
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -13,23 +13,30 @@
#include "llimits.h" #include "llimits.h"
#include "lua.h" #include "lua.h"
#define MEMERRMSG "not enough memory"
/*
** This macro avoids the runtime division MAX_SIZET/(e), as 'e' is
** always constant.
** The macro is somewhat complex to avoid warnings:
** +1 avoids warnings of "comparison has constant result";
** cast to 'void' avoids warnings of "value unused".
*/
#define luaM_reallocv(L,b,on,n,e) \ #define luaM_reallocv(L,b,on,n,e) \
((cast(size_t, (n)+1) <= MAX_SIZET/(e)) ? /* +1 to avoid warnings */ \ (cast(void, \
luaM_realloc_(L, (b), (on)*(e), (n)*(e)) : \ (cast(size_t, (n)+1) > MAX_SIZET/(e)) ? (luaM_toobig(L), 0) : 0), \
luaM_toobig(L)) luaM_realloc_(L, (b), (on)*(e), (n)*(e)))
#define luaM_freemem(L, b, s) luaM_realloc_(L, (b), (s), 0) #define luaM_freemem(L, b, s) luaM_realloc_(L, (b), (s), 0)
#define luaM_free(L, b) luaM_realloc_(L, (b), sizeof(*(b)), 0) #define luaM_free(L, b) luaM_realloc_(L, (b), sizeof(*(b)), 0)
#define luaM_freearray(L, b, n, t) luaM_reallocv(L, (b), n, 0, sizeof(t)) #define luaM_freearray(L, b, n) luaM_reallocv(L, (b), n, 0, sizeof((b)[0]))
#define luaM_malloc(L,t) luaM_realloc_(L, NULL, 0, (t)) #define luaM_malloc(L,s) luaM_realloc_(L, NULL, 0, (s))
#define luaM_new(L,t) cast(t *, luaM_malloc(L, sizeof(t))) #define luaM_new(L,t) cast(t *, luaM_malloc(L, sizeof(t)))
#define luaM_newvector(L,n,t) \ #define luaM_newvector(L,n,t) \
cast(t *, luaM_reallocv(L, NULL, 0, n, sizeof(t))) cast(t *, luaM_reallocv(L, NULL, 0, n, sizeof(t)))
#define luaM_newobject(L,tag,s) luaM_realloc_(L, NULL, tag, (s))
#define luaM_growvector(L,v,nelems,size,t,limit,e) \ #define luaM_growvector(L,v,nelems,size,t,limit,e) \
if ((nelems)+1 > (size)) \ if ((nelems)+1 > (size)) \
((v)=cast(t *, luaM_growaux_(L,v,&(size),sizeof(t),limit,e))) ((v)=cast(t *, luaM_growaux_(L,v,&(size),sizeof(t),limit,e)))
@ -37,13 +44,14 @@
#define luaM_reallocvector(L, v,oldn,n,t) \ #define luaM_reallocvector(L, v,oldn,n,t) \
((v)=cast(t *, luaM_reallocv(L, v, oldn, n, sizeof(t)))) ((v)=cast(t *, luaM_reallocv(L, v, oldn, n, sizeof(t))))
LUAI_FUNC l_noret luaM_toobig (lua_State *L);
/* not to be called directly */
LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize, LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize,
size_t size); size_t size);
LUAI_FUNC void *luaM_toobig (lua_State *L);
LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int *size, LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int *size,
size_t size_elem, int limit, size_t size_elem, int limit,
const char *errormsg); const char *what);
#endif #endif

View file

@ -1,14 +1,22 @@
/* /*
** $Id: loadlib.c,v 1.52.1.3 2008/08/06 13:29:28 roberto Exp $ ** $Id: loadlib.c,v 1.111.1.1 2013/04/12 18:48:47 roberto Exp $
** Dynamic library loader for Lua ** Dynamic library loader for Lua
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
** **
** This module contains an implementation of loadlib for Unix systems ** This module contains an implementation of loadlib for Unix systems
** that have dlfcn, an implementation for Darwin (Mac OS X), an ** that have dlfcn, an implementation for Windows, and a stub for other
** implementation for Windows, and a stub for other systems. ** systems.
*/ */
/*
** if needed, includes windows header before everything else
*/
#if defined(_WIN32)
#include <windows.h>
#endif
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
@ -20,10 +28,296 @@
#include "lauxlib.h" #include "lauxlib.h"
#include "lualib.h" #include "lualib.h"
#include "rocklib.h"
#define setprogdir(L) ((void)0) /*
** LUA_PATH and LUA_CPATH are the names of the environment
** variables that Lua check to set its paths.
*/
#if !defined(LUA_PATH)
#define LUA_PATH "LUA_PATH"
#endif
#if !defined(LUA_CPATH)
#define LUA_CPATH "LUA_CPATH"
#endif
#define LUA_PATHSUFFIX "_" LUA_VERSION_MAJOR "_" LUA_VERSION_MINOR
#define LUA_PATHVERSION LUA_PATH LUA_PATHSUFFIX
#define LUA_CPATHVERSION LUA_CPATH LUA_PATHSUFFIX
/*
** LUA_PATH_SEP is the character that separates templates in a path.
** LUA_PATH_MARK is the string that marks the substitution points in a
** template.
** LUA_EXEC_DIR in a Windows path is replaced by the executable's
** directory.
** LUA_IGMARK is a mark to ignore all before it when building the
** luaopen_ function name.
*/
#if !defined (LUA_PATH_SEP)
#define LUA_PATH_SEP ";"
#endif
#if !defined (LUA_PATH_MARK)
#define LUA_PATH_MARK "?"
#endif
#if !defined (LUA_EXEC_DIR)
#define LUA_EXEC_DIR "!"
#endif
#if !defined (LUA_IGMARK)
#define LUA_IGMARK "-"
#endif
/*
** LUA_CSUBSEP is the character that replaces dots in submodule names
** when searching for a C loader.
** LUA_LSUBSEP is the character that replaces dots in submodule names
** when searching for a Lua loader.
*/
#if !defined(LUA_CSUBSEP)
#define LUA_CSUBSEP LUA_DIRSEP
#endif
#if !defined(LUA_LSUBSEP)
#define LUA_LSUBSEP LUA_DIRSEP
#endif
/* prefix for open functions in C libraries */
#define LUA_POF "luaopen_"
/* separator for open functions in C libraries */
#define LUA_OFSEP "_"
/* table (in the registry) that keeps handles for all loaded C libraries */
#define CLIBS "_CLIBS"
#define LIB_FAIL "open"
/* error codes for ll_loadfunc */
#define ERRLIB 1
#define ERRFUNC 2
#define setprogdir(L) ((void)0)
/*
** system-dependent functions
*/
static void ll_unloadlib (void *lib);
static void *ll_load (lua_State *L, const char *path, int seeglb);
static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym);
#if defined(LUA_USE_DLOPEN)
/*
** {========================================================================
** This is an implementation of loadlib based on the dlfcn interface.
** The dlfcn interface is available in Linux, SunOS, Solaris, IRIX, FreeBSD,
** NetBSD, AIX 4.2, HPUX 11, and probably most other Unix flavors, at least
** as an emulation layer on top of native functions.
** =========================================================================
*/
#include <dlfcn.h>
static void ll_unloadlib (void *lib) {
dlclose(lib);
}
static void *ll_load (lua_State *L, const char *path, int seeglb) {
void *lib = dlopen(path, RTLD_NOW | (seeglb ? RTLD_GLOBAL : RTLD_LOCAL));
if (lib == NULL) lua_pushstring(L, dlerror());
return lib;
}
static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
lua_CFunction f = (lua_CFunction)dlsym(lib, sym);
if (f == NULL) lua_pushstring(L, dlerror());
return f;
}
/* }====================================================== */
#elif defined(LUA_DL_DLL)
/*
** {======================================================================
** This is an implementation of loadlib for Windows using native functions.
** =======================================================================
*/
#undef setprogdir
/*
** optional flags for LoadLibraryEx
*/
#if !defined(LUA_LLE_FLAGS)
#define LUA_LLE_FLAGS 0
#endif
static void setprogdir (lua_State *L) {
char buff[MAX_PATH + 1];
char *lb;
DWORD nsize = sizeof(buff)/sizeof(char);
DWORD n = GetModuleFileNameA(NULL, buff, nsize);
if (n == 0 || n == nsize || (lb = rb->strrchr(buff, '\\')) == NULL)
luaL_error(L, "unable to get ModuleFileName");
else {
*lb = '\0';
luaL_gsub(L, lua_tostring(L, -1), LUA_EXEC_DIR, buff);
lua_remove(L, -2); /* remove original string */
}
}
static void pusherror (lua_State *L) {
int error = GetLastError();
char buffer[128];
if (FormatMessageA(FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_FROM_SYSTEM,
NULL, error, 0, buffer, sizeof(buffer)/sizeof(char), NULL))
lua_pushstring(L, buffer);
else
lua_pushfstring(L, "system error %d\n", error);
}
static void ll_unloadlib (void *lib) {
FreeLibrary((HMODULE)lib);
}
static void *ll_load (lua_State *L, const char *path, int seeglb) {
HMODULE lib = LoadLibraryExA(path, NULL, LUA_LLE_FLAGS);
(void)(seeglb); /* not used: symbols are 'global' by default */
if (lib == NULL) pusherror(L);
return lib;
}
static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
lua_CFunction f = (lua_CFunction)GetProcAddress((HMODULE)lib, sym);
if (f == NULL) pusherror(L);
return f;
}
/* }====================================================== */
#else
/*
** {======================================================
** Fallback for other systems
** =======================================================
*/
#undef LIB_FAIL
#define LIB_FAIL "absent"
#define DLMSG "dynamic libraries not enabled; check your Lua installation"
static void ll_unloadlib (void *lib) {
(void)(lib); /* not used */
}
static void *ll_load (lua_State *L, const char *path, int seeglb) {
(void)(path); (void)(seeglb); /* not used */
lua_pushliteral(L, DLMSG);
return NULL;
}
static lua_CFunction ll_sym (lua_State *L, void *lib, const char *sym) {
(void)(lib); (void)(sym); /* not used */
lua_pushliteral(L, DLMSG);
return NULL;
}
/* }====================================================== */
#endif
static void *ll_checkclib (lua_State *L, const char *path) {
void *plib;
lua_getfield(L, LUA_REGISTRYINDEX, CLIBS);
lua_getfield(L, -1, path);
plib = lua_touserdata(L, -1); /* plib = CLIBS[path] */
lua_pop(L, 2); /* pop CLIBS table and 'plib' */
return plib;
}
static void ll_addtoclib (lua_State *L, const char *path, void *plib) {
lua_getfield(L, LUA_REGISTRYINDEX, CLIBS);
lua_pushlightuserdata(L, plib);
lua_pushvalue(L, -1);
lua_setfield(L, -3, path); /* CLIBS[path] = plib */
lua_rawseti(L, -2, luaL_len(L, -2) + 1); /* CLIBS[#CLIBS + 1] = plib */
lua_pop(L, 1); /* pop CLIBS table */
}
/*
** __gc tag method for CLIBS table: calls 'll_unloadlib' for all lib
** handles in list CLIBS
*/
static int gctm (lua_State *L) {
int n = luaL_len(L, 1);
for (; n >= 1; n--) { /* for each handle, in reverse order */
lua_rawgeti(L, 1, n); /* get handle CLIBS[n] */
ll_unloadlib(lua_touserdata(L, -1));
lua_pop(L, 1); /* pop handle */
}
return 0;
}
static int ll_loadfunc (lua_State *L, const char *path, const char *sym) {
void *reg = ll_checkclib(L, path); /* check loaded C libraries */
if (reg == NULL) { /* must load library? */
reg = ll_load(L, path, *sym == '*');
if (reg == NULL) return ERRLIB; /* unable to load library */
ll_addtoclib(L, path, reg);
}
if (*sym == '*') { /* loading only library (no function)? */
lua_pushboolean(L, 1); /* return 'true' */
return 0; /* no errors */
}
else {
lua_CFunction f = ll_sym(L, reg, sym);
if (f == NULL)
return ERRFUNC; /* unable to find function */
lua_pushcfunction(L, f); /* else create new function */
return 0; /* no errors */
}
}
static int ll_loadlib (lua_State *L) {
const char *path = luaL_checkstring(L, 1);
const char *init = luaL_checkstring(L, 2);
int stat = ll_loadfunc(L, path, init);
if (stat == 0) /* no errors? */
return 1; /* return the loaded function */
else { /* error; error message is on stack top */
lua_pushnil(L);
lua_insert(L, -2);
lua_pushstring(L, (stat == ERRLIB) ? LIB_FAIL : "init");
return 3; /* return nil, error message, and where */
}
}
/* /*
@ -34,70 +328,143 @@
static int readable (const char *filename) { static int readable (const char *filename) {
int f = rb->open(filename, O_RDONLY); /* try to open file */ return rb->file_exists(filename);
if (f < 0) return 0; /* open failed */
rb->close(f);
return 1;
} }
static const char *pushnexttemplate (lua_State *L, const char *path) { static const char *pushnexttemplate (lua_State *L, const char *path) {
const char *l; const char *l;
while (*path == *LUA_PATHSEP) path++; /* skip separators */ while (*path == *LUA_PATH_SEP) path++; /* skip separators */
if (*path == '\0') return NULL; /* no more templates */ if (*path == '\0') return NULL; /* no more templates */
l = strchr(path, *LUA_PATHSEP); /* find next separator */ l = strchr(path, *LUA_PATH_SEP); /* find next separator */
if (l == NULL) l = path + strlen(path); if (l == NULL) l = path + strlen(path);
lua_pushlstring(L, path, l - path); /* template */ lua_pushlstring(L, path, l - path); /* template */
return l; return l;
} }
static const char *findfile (lua_State *L, const char *name, static const char *searchpath (lua_State *L, const char *name,
const char *pname) { const char *path,
const char *path, *current_path = get_current_path(L, 2); const char *sep,
name = luaL_gsub(L, name, ".", LUA_DIRSEP); const char *dirsep) {
lua_getfield(L, LUA_ENVIRONINDEX, pname); luaL_Buffer msg; /* to build error message */
path = lua_tostring(L, -1); luaL_buffinit(L, &msg);
if (path == NULL) if (*sep != '\0') /* non-empty separator? */
luaL_error(L, LUA_QL("package.%s") " must be a string", pname); name = luaL_gsub(L, name, sep, dirsep); /* replace it by 'dirsep' */
lua_pushliteral(L, ""); /* error accumulator */
while ((path = pushnexttemplate(L, path)) != NULL) { while ((path = pushnexttemplate(L, path)) != NULL) {
const char *filename; const char *filename = luaL_gsub(L, lua_tostring(L, -1),
filename = luaL_gsub(L, lua_tostring(L, -1), LUA_PATH_MARK, name); LUA_PATH_MARK, name);
if(current_path != NULL) filename = luaL_gsub(L, filename, "$", current_path);
lua_remove(L, -2); /* remove path template */ lua_remove(L, -2); /* remove path template */
if (readable(filename)) /* does file exist and is readable? */ if (readable(filename)) /* does file exist and is readable? */
return filename; /* return that file name */ return filename; /* return that file name */
lua_pushfstring(L, "\n\tno file " LUA_QS, filename); lua_pushfstring(L, "\n\tno file " LUA_QS, filename);
lua_remove(L, -2); /* remove file name */ lua_remove(L, -2); /* remove file name */
lua_concat(L, 2); /* add entry to possible error message */ luaL_addvalue(&msg); /* concatenate error msg. entry */
} }
luaL_pushresult(&msg); /* create error message */
return NULL; /* not found */ return NULL; /* not found */
} }
static void loaderror (lua_State *L, const char *filename) { static int ll_searchpath (lua_State *L) {
luaL_error(L, "error loading module " LUA_QS " from file " LUA_QS ":\n\t%s", const char *f = searchpath(L, luaL_checkstring(L, 1),
lua_tostring(L, 1), filename, lua_tostring(L, -1)); luaL_checkstring(L, 2),
luaL_optstring(L, 3, "."),
luaL_optstring(L, 4, LUA_DIRSEP));
if (f != NULL) return 1;
else { /* error message is on top of the stack */
lua_pushnil(L);
lua_insert(L, -2);
return 2; /* return nil + error message */
}
} }
static int loader_Lua (lua_State *L) { static const char *findfile (lua_State *L, const char *name,
const char *pname,
const char *dirsep) {
const char *path;
lua_getfield(L, lua_upvalueindex(1), pname);
path = lua_tostring(L, -1);
if (path == NULL)
luaL_error(L, LUA_QL("package.%s") " must be a string", pname);
return searchpath(L, name, path, ".", dirsep);
}
static int checkload (lua_State *L, int stat, const char *filename) {
if (stat) { /* module loaded successfully? */
lua_pushstring(L, filename); /* will be 2nd argument to module */
return 2; /* return open function and file name */
}
else
return luaL_error(L, "error loading module " LUA_QS
" from file " LUA_QS ":\n\t%s",
lua_tostring(L, 1), filename, lua_tostring(L, -1));
}
static int searcher_Lua (lua_State *L) {
const char *filename; const char *filename;
const char *name = luaL_checkstring(L, 1); const char *name = luaL_checkstring(L, 1);
filename = findfile(L, name, "path"); filename = findfile(L, name, "path", LUA_LSUBSEP);
if (filename == NULL) return 1; /* library not found in this path */ if (filename == NULL) return 1; /* module not found in this path */
if (luaL_loadfile(L, filename) != 0) return checkload(L, (luaL_loadfile(L, filename) == LUA_OK), filename);
loaderror(L, filename);
return 1; /* library loaded successfully */
} }
static int loader_preload (lua_State *L) { static int loadfunc (lua_State *L, const char *filename, const char *modname) {
const char *funcname;
const char *mark;
modname = luaL_gsub(L, modname, ".", LUA_OFSEP);
mark = strchr(modname, *LUA_IGMARK);
if (mark) {
int stat;
funcname = lua_pushlstring(L, modname, mark - modname);
funcname = lua_pushfstring(L, LUA_POF"%s", funcname);
stat = ll_loadfunc(L, filename, funcname);
if (stat != ERRFUNC) return stat;
modname = mark + 1; /* else go ahead and try old-style name */
}
funcname = lua_pushfstring(L, LUA_POF"%s", modname);
return ll_loadfunc(L, filename, funcname);
}
static int searcher_C (lua_State *L) {
const char *name = luaL_checkstring(L, 1); const char *name = luaL_checkstring(L, 1);
lua_getfield(L, LUA_ENVIRONINDEX, "preload"); const char *filename = findfile(L, name, "cpath", LUA_CSUBSEP);
if (!lua_istable(L, -1)) if (filename == NULL) return 1; /* module not found in this path */
luaL_error(L, LUA_QL("package.preload") " must be a table"); return checkload(L, (loadfunc(L, filename, name) == 0), filename);
}
static int searcher_Croot (lua_State *L) {
const char *filename;
const char *name = luaL_checkstring(L, 1);
const char *p = strchr(name, '.');
int stat;
if (p == NULL) return 0; /* is root */
lua_pushlstring(L, name, p - name);
filename = findfile(L, lua_tostring(L, -1), "cpath", LUA_CSUBSEP);
if (filename == NULL) return 1; /* root not found */
if ((stat = loadfunc(L, filename, name)) != 0) {
if (stat != ERRFUNC)
return checkload(L, 0, filename); /* real error */
else { /* open function not found */
lua_pushfstring(L, "\n\tno module " LUA_QS " in file " LUA_QS,
name, filename);
return 1;
}
}
lua_pushstring(L, filename); /* will be 2nd argument to module */
return 2;
}
static int searcher_preload (lua_State *L) {
const char *name = luaL_checkstring(L, 1);
lua_getfield(L, LUA_REGISTRYINDEX, "_PRELOAD");
lua_getfield(L, -1, name); lua_getfield(L, -1, name);
if (lua_isnil(L, -1)) /* not found? */ if (lua_isnil(L, -1)) /* not found? */
lua_pushfstring(L, "\n\tno field package.preload['%s']", name); lua_pushfstring(L, "\n\tno field package.preload['%s']", name);
@ -105,48 +472,53 @@ static int loader_preload (lua_State *L) {
} }
static const int sentinel_ = 0; static void findloader (lua_State *L, const char *name) {
#define sentinel ((void *)&sentinel_) int i;
luaL_Buffer msg; /* to build error message */
luaL_buffinit(L, &msg);
lua_getfield(L, lua_upvalueindex(1), "searchers"); /* will be at index 3 */
if (!lua_istable(L, 3))
luaL_error(L, LUA_QL("package.searchers") " must be a table");
/* iterate over available searchers to find a loader */
for (i = 1; ; i++) {
lua_rawgeti(L, 3, i); /* get a searcher */
if (lua_isnil(L, -1)) { /* no more searchers? */
lua_pop(L, 1); /* remove nil */
luaL_pushresult(&msg); /* create error message */
luaL_error(L, "module " LUA_QS " not found:%s",
name, lua_tostring(L, -1));
}
lua_pushstring(L, name);
lua_call(L, 1, 2); /* call it */
if (lua_isfunction(L, -2)) /* did it find a loader? */
return; /* module loader found */
else if (lua_isstring(L, -2)) { /* searcher returned error message? */
lua_pop(L, 1); /* remove extra return */
luaL_addvalue(&msg); /* concatenate error message */
}
else
lua_pop(L, 2); /* remove both returns */
}
}
static int ll_require (lua_State *L) { static int ll_require (lua_State *L) {
const char *name = luaL_checkstring(L, 1); const char *name = luaL_checkstring(L, 1);
int i;
lua_settop(L, 1); /* _LOADED table will be at index 2 */ lua_settop(L, 1); /* _LOADED table will be at index 2 */
lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED"); lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED");
lua_getfield(L, 2, name); lua_getfield(L, 2, name); /* _LOADED[name] */
if (lua_toboolean(L, -1)) { /* is it there? */ if (lua_toboolean(L, -1)) /* is it there? */
if (lua_touserdata(L, -1) == sentinel) /* check loops */
luaL_error(L, "loop or previous error loading module " LUA_QS, name);
return 1; /* package is already loaded */ return 1; /* package is already loaded */
} /* else must load package */
/* else must load it; iterate over available loaders */ lua_pop(L, 1); /* remove 'getfield' result */
lua_getfield(L, LUA_ENVIRONINDEX, "loaders"); findloader(L, name);
if (!lua_istable(L, -1)) lua_pushstring(L, name); /* pass name as argument to module loader */
luaL_error(L, LUA_QL("package.loaders") " must be a table"); lua_insert(L, -2); /* name is 1st argument (before search data) */
lua_pushliteral(L, ""); /* error message accumulator */ lua_call(L, 2, 1); /* run loader to load module */
for (i=1; ; i++) {
lua_rawgeti(L, -2, i); /* get a loader */
if (lua_isnil(L, -1))
luaL_error(L, "module " LUA_QS " not found:%s",
name, lua_tostring(L, -2));
lua_pushstring(L, name);
lua_call(L, 1, 1); /* call it */
if (lua_isfunction(L, -1)) /* did it find module? */
break; /* module loaded successfully */
else if (lua_isstring(L, -1)) /* loader returned error message? */
lua_concat(L, 2); /* accumulate it */
else
lua_pop(L, 1);
}
lua_pushlightuserdata(L, sentinel);
lua_setfield(L, 2, name); /* _LOADED[name] = sentinel */
lua_pushstring(L, name); /* pass name as argument to module */
lua_call(L, 1, 1); /* run loaded module */
if (!lua_isnil(L, -1)) /* non-nil return? */ if (!lua_isnil(L, -1)) /* non-nil return? */
lua_setfield(L, 2, name); /* _LOADED[name] = returned value */ lua_setfield(L, 2, name); /* _LOADED[name] = returned value */
lua_getfield(L, 2, name); lua_getfield(L, 2, name);
if (lua_touserdata(L, -1) == sentinel) { /* module did not set a value? */ if (lua_isnil(L, -1)) { /* module did not set a value? */
lua_pushboolean(L, 1); /* use true as result */ lua_pushboolean(L, 1); /* use true as result */
lua_pushvalue(L, -1); /* extra copy to be returned */ lua_pushvalue(L, -1); /* extra copy to be returned */
lua_setfield(L, 2, name); /* _LOADED[name] = true */ lua_setfield(L, 2, name); /* _LOADED[name] = true */
@ -163,26 +535,31 @@ static int ll_require (lua_State *L) {
** 'module' function ** 'module' function
** ======================================================= ** =======================================================
*/ */
#if defined(LUA_COMPAT_MODULE)
static void setfenv (lua_State *L) { /*
** changes the environment variable of calling function
*/
static void set_env (lua_State *L) {
lua_Debug ar; lua_Debug ar;
if (lua_getstack(L, 1, &ar) == 0 || if (lua_getstack(L, 1, &ar) == 0 ||
lua_getinfo(L, "f", &ar) == 0 || /* get calling function */ lua_getinfo(L, "f", &ar) == 0 || /* get calling function */
lua_iscfunction(L, -1)) lua_iscfunction(L, -1))
luaL_error(L, LUA_QL("module") " not called from a Lua function"); luaL_error(L, LUA_QL("module") " not called from a Lua function");
lua_pushvalue(L, -2); lua_pushvalue(L, -2); /* copy new environment table to top */
lua_setfenv(L, -2); lua_setupvalue(L, -2, 1);
lua_pop(L, 1); lua_pop(L, 1); /* remove function */
} }
static void dooptions (lua_State *L, int n) { static void dooptions (lua_State *L, int n) {
int i; int i;
for (i = 2; i <= n; i++) { for (i = 2; i <= n; i++) {
lua_pushvalue(L, i); /* get option (a function) */ if (lua_isfunction(L, i)) { /* avoid 'calling' extra info. */
lua_pushvalue(L, -2); /* module */ lua_pushvalue(L, i); /* get option (a function) */
lua_call(L, 1, 0); lua_pushvalue(L, -2); /* module */
lua_call(L, 1, 0);
}
} }
} }
@ -204,17 +581,8 @@ static void modinit (lua_State *L, const char *modname) {
static int ll_module (lua_State *L) { static int ll_module (lua_State *L) {
const char *modname = luaL_checkstring(L, 1); const char *modname = luaL_checkstring(L, 1);
int loaded = lua_gettop(L) + 1; /* index of _LOADED table */ int lastarg = lua_gettop(L); /* last parameter */
lua_getfield(L, LUA_REGISTRYINDEX, "_LOADED"); luaL_pushmodule(L, modname, 1); /* get/create module table */
lua_getfield(L, loaded, modname); /* get _LOADED[modname] */
if (!lua_istable(L, -1)) { /* not found? */
lua_pop(L, 1); /* remove previous result */
/* try global variable (and create one if it does not exist) */
if (luaL_findtable(L, LUA_GLOBALSINDEX, modname, 1) != NULL)
return luaL_error(L, "name conflict for module " LUA_QS, modname);
lua_pushvalue(L, -1);
lua_setfield(L, loaded, modname); /* _LOADED[modname] = new table */
}
/* check whether table already has a _NAME field */ /* check whether table already has a _NAME field */
lua_getfield(L, -1, "_NAME"); lua_getfield(L, -1, "_NAME");
if (!lua_isnil(L, -1)) /* is table an initialized module? */ if (!lua_isnil(L, -1)) /* is table an initialized module? */
@ -224,9 +592,9 @@ static int ll_module (lua_State *L) {
modinit(L, modname); modinit(L, modname);
} }
lua_pushvalue(L, -1); lua_pushvalue(L, -1);
setfenv(L); set_env(L);
dooptions(L, loaded - 1); dooptions(L, lastarg);
return 0; return 1;
} }
@ -237,22 +605,38 @@ static int ll_seeall (lua_State *L) {
lua_pushvalue(L, -1); lua_pushvalue(L, -1);
lua_setmetatable(L, 1); lua_setmetatable(L, 1);
} }
lua_pushvalue(L, LUA_GLOBALSINDEX); lua_pushglobaltable(L);
lua_setfield(L, -2, "__index"); /* mt.__index = _G */ lua_setfield(L, -2, "__index"); /* mt.__index = _G */
return 0; return 0;
} }
#endif
/* }====================================================== */ /* }====================================================== */
/* auxiliary mark (for internal use) */ /* auxiliary mark (for internal use) */
#define AUXMARK "\1" #define AUXMARK "\1"
static void setpath (lua_State *L, const char *fieldname, const char *envname,
const char *def) { /*
(void)envname; ** return registry.LUA_NOENV as a boolean
*/
#if 0
static int noenv (lua_State *L) {
int b;
lua_getfield(L, LUA_REGISTRYINDEX, "LUA_NOENV");
b = lua_toboolean(L, -1);
lua_pop(L, 1); /* remove value */
return b;
}
#endif
static void setpath (lua_State *L, const char *fieldname, const char *envname1,
const char *envname2, const char *def) {
(void)envname1;
(void)envname2;
lua_pushstring(L, def); /* use default */ lua_pushstring(L, def); /* use default */
setprogdir(L); setprogdir(L);
lua_setfield(L, -2, fieldname); lua_setfield(L, -2, fieldname);
@ -260,56 +644,72 @@ static void setpath (lua_State *L, const char *fieldname, const char *envname,
static const luaL_Reg pk_funcs[] = { static const luaL_Reg pk_funcs[] = {
{"loadlib", ll_loadlib},
{"searchpath", ll_searchpath},
#if defined(LUA_COMPAT_MODULE)
{"seeall", ll_seeall}, {"seeall", ll_seeall},
#endif
{NULL, NULL} {NULL, NULL}
}; };
static const luaL_Reg ll_funcs[] = { static const luaL_Reg ll_funcs[] = {
#if defined(LUA_COMPAT_MODULE)
{"module", ll_module}, {"module", ll_module},
#endif
{"require", ll_require}, {"require", ll_require},
{NULL, NULL} {NULL, NULL}
}; };
static const lua_CFunction loaders[] = static void createsearcherstable (lua_State *L) {
{loader_preload, loader_Lua, NULL}; static const lua_CFunction searchers[] =
{searcher_preload, searcher_Lua, searcher_C, searcher_Croot, NULL};
LUALIB_API int luaopen_package (lua_State *L) {
int i; int i;
/* create new type _LOADLIB */ /* create 'searchers' table */
luaL_newmetatable(L, "_LOADLIB"); lua_createtable(L, sizeof(searchers)/sizeof(searchers[0]) - 1, 0);
/* create `package' table */ /* fill it with pre-defined searchers */
luaL_register(L, LUA_LOADLIBNAME, pk_funcs); for (i=0; searchers[i] != NULL; i++) {
#if defined(LUA_COMPAT_LOADLIB) lua_pushvalue(L, -2); /* set 'package' as upvalue for all searchers */
lua_getfield(L, -1, "loadlib"); lua_pushcclosure(L, searchers[i], 1);
lua_setfield(L, LUA_GLOBALSINDEX, "loadlib");
#endif
lua_pushvalue(L, -1);
lua_replace(L, LUA_ENVIRONINDEX);
/* create `loaders' table */
lua_createtable(L, 0, sizeof(loaders)/sizeof(loaders[0]) - 1);
/* fill it with pre-defined loaders */
for (i=0; loaders[i] != NULL; i++) {
lua_pushcfunction(L, loaders[i]);
lua_rawseti(L, -2, i+1); lua_rawseti(L, -2, i+1);
} }
lua_setfield(L, -2, "loaders"); /* put it in field `loaders' */ }
setpath(L, "path", LUA_PATH, LUA_PATH_DEFAULT); /* set field `path' */
LUAMOD_API int luaopen_package (lua_State *L) {
/* create table CLIBS to keep track of loaded C libraries */
luaL_getsubtable(L, LUA_REGISTRYINDEX, CLIBS);
lua_createtable(L, 0, 1); /* metatable for CLIBS */
lua_pushcfunction(L, gctm);
lua_setfield(L, -2, "__gc"); /* set finalizer for CLIBS table */
lua_setmetatable(L, -2);
/* create `package' table */
luaL_newlib(L, pk_funcs);
createsearcherstable(L);
#if defined(LUA_COMPAT_LOADERS)
lua_pushvalue(L, -1); /* make a copy of 'searchers' table */
lua_setfield(L, -3, "loaders"); /* put it in field `loaders' */
#endif
lua_setfield(L, -2, "searchers"); /* put it in field 'searchers' */
/* set field 'path' */
setpath(L, "path", LUA_PATHVERSION, LUA_PATH, LUA_PATH_DEFAULT);
/* set field 'cpath' */
setpath(L, "cpath", LUA_CPATHVERSION, LUA_CPATH, LUA_CPATH_DEFAULT);
/* store config information */ /* store config information */
lua_pushliteral(L, LUA_DIRSEP "\n" LUA_PATHSEP "\n" LUA_PATH_MARK "\n" lua_pushliteral(L, LUA_DIRSEP "\n" LUA_PATH_SEP "\n" LUA_PATH_MARK "\n"
LUA_EXECDIR "\n" LUA_IGMARK); LUA_EXEC_DIR "\n" LUA_IGMARK "\n");
lua_setfield(L, -2, "config"); lua_setfield(L, -2, "config");
/* set field `loaded' */ /* set field `loaded' */
luaL_findtable(L, LUA_REGISTRYINDEX, "_LOADED", 2); luaL_getsubtable(L, LUA_REGISTRYINDEX, "_LOADED");
lua_setfield(L, -2, "loaded"); lua_setfield(L, -2, "loaded");
/* set field `preload' */ /* set field `preload' */
lua_newtable(L); luaL_getsubtable(L, LUA_REGISTRYINDEX, "_PRELOAD");
lua_setfield(L, -2, "preload"); lua_setfield(L, -2, "preload");
lua_pushvalue(L, LUA_GLOBALSINDEX); lua_pushglobaltable(L);
luaL_register(L, NULL, ll_funcs); /* open lib into global table */ lua_pushvalue(L, -2); /* set 'package' as upvalue for next lib */
lua_pop(L, 1); luaL_setfuncs(L, ll_funcs, 1); /* open lib into global table */
lua_pop(L, 1); /* pop global table */
return 1; /* return 'package' table */ return 1; /* return 'package' table */
} }

View file

@ -1,5 +1,5 @@
/* /*
** $Id: lobject.c,v 2.22.1.1 2007/12/27 13:02:25 roberto Exp $ ** $Id: lobject.c,v 2.58.1.1 2013/04/12 18:48:47 roberto Exp $
** Some generic functions over Lua objects ** Some generic functions over Lua objects
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -15,6 +15,8 @@
#include "lua.h" #include "lua.h"
#include "lctype.h"
#include "ldebug.h"
#include "ldo.h" #include "ldo.h"
#include "lmem.h" #include "lmem.h"
#include "lobject.h" #include "lobject.h"
@ -24,7 +26,7 @@
const TValue luaO_nilobject_ = {{NULL}, LUA_TNIL}; LUAI_DDEF const TValue luaO_nilobject_ = {NILCONSTANT};
/* /*
@ -33,25 +35,25 @@ const TValue luaO_nilobject_ = {{NULL}, LUA_TNIL};
** eeeee != 0 and (xxx) otherwise. ** eeeee != 0 and (xxx) otherwise.
*/ */
int luaO_int2fb (unsigned int x) { int luaO_int2fb (unsigned int x) {
int e = 0; /* expoent */ int e = 0; /* exponent */
while (x >= 16) { if (x < 8) return x;
while (x >= 0x10) {
x = (x+1) >> 1; x = (x+1) >> 1;
e++; e++;
} }
if (x < 8) return x; return ((e+1) << 3) | (cast_int(x) - 8);
else return ((e+1) << 3) | (cast_int(x) - 8);
} }
/* converts back */ /* converts back */
int luaO_fb2int (int x) { int luaO_fb2int (int x) {
int e = (x >> 3) & 31; int e = (x >> 3) & 0x1f;
if (e == 0) return x; if (e == 0) return x;
else return ((x & 7)+8) << (e - 1); else return ((x & 7) + 8) << (e - 1);
} }
int luaO_log2 (unsigned int x) { int luaO_ceillog2 (unsigned int x) {
static const lu_byte log_2[256] = { static const lu_byte log_2[256] = {
0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5, 0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
@ -62,109 +64,169 @@ int luaO_log2 (unsigned int x) {
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
}; };
int l = -1; int l = 0;
x--;
while (x >= 256) { l += 8; x >>= 8; } while (x >= 256) { l += 8; x >>= 8; }
return l + log_2[x]; return l + log_2[x];
} }
int luaO_rawequalObj (const TValue *t1, const TValue *t2) { lua_Number luaO_arith (int op, lua_Number v1, lua_Number v2) {
if (ttype(t1) != ttype(t2)) return 0; switch (op) {
else switch (ttype(t1)) { case LUA_OPADD: return luai_numadd(NULL, v1, v2);
case LUA_TNIL: case LUA_OPSUB: return luai_numsub(NULL, v1, v2);
return 1; case LUA_OPMUL: return luai_nummul(NULL, v1, v2);
case LUA_TNUMBER: case LUA_OPDIV: return luai_numdiv(NULL, v1, v2);
return luai_numeq(nvalue(t1), nvalue(t2)); case LUA_OPMOD: return luai_nummod(NULL, v1, v2);
case LUA_TBOOLEAN: case LUA_OPPOW: return luai_numpow(NULL, v1, v2);
return bvalue(t1) == bvalue(t2); /* boolean true must be 1 !! */ case LUA_OPUNM: return luai_numunm(NULL, v1);
case LUA_TLIGHTUSERDATA: default: lua_assert(0); return 0;
return pvalue(t1) == pvalue(t2);
default:
lua_assert(iscollectable(t1));
return gcvalue(t1) == gcvalue(t2);
} }
} }
int luaO_str2d (const char *s, lua_Number *result) { int luaO_hexavalue (int c) {
if (lisdigit(c)) return c - '0';
else return ltolower(c) - 'a' + 10;
}
#if !defined(lua_strx2number)
#include <math.h>
static int isneg (const char **s) {
if (**s == '-') { (*s)++; return 1; }
else if (**s == '+') (*s)++;
return 0;
}
static lua_Number readhexa (const char **s, lua_Number r, int *count) {
for (; lisxdigit(cast_uchar(**s)); (*s)++) { /* read integer part */
r = (r * cast_num(16.0)) + cast_num(luaO_hexavalue(cast_uchar(**s)));
(*count)++;
}
return r;
}
/*
** convert an hexadecimal numeric string to a number, following
** C99 specification for 'strtod'
*/
static lua_Number lua_strx2number (const char *s, char **endptr) {
lua_Number r = 0.0;
int e = 0, i = 0;
int neg = 0; /* 1 if number is negative */
*endptr = cast(char *, s); /* nothing is valid yet */
while (lisspace(cast_uchar(*s))) s++; /* skip initial spaces */
neg = isneg(&s); /* check signal */
if (!(*s == '0' && (*(s + 1) == 'x' || *(s + 1) == 'X'))) /* check '0x' */
return 0.0; /* invalid format (no '0x') */
s += 2; /* skip '0x' */
r = readhexa(&s, r, &i); /* read integer part */
if (*s == '.') {
s++; /* skip dot */
r = readhexa(&s, r, &e); /* read fractional part */
}
if (i == 0 && e == 0)
return 0.0; /* invalid format (no digit) */
e *= -4; /* each fractional digit divides value by 2^-4 */
*endptr = cast(char *, s); /* valid up to here */
if (*s == 'p' || *s == 'P') { /* exponent part? */
int exp1 = 0;
int neg1;
s++; /* skip 'p' */
neg1 = isneg(&s); /* signal */
if (!lisdigit(cast_uchar(*s)))
goto ret; /* must have at least one digit */
while (lisdigit(cast_uchar(*s))) /* read exponent */
exp1 = exp1 * 10 + *(s++) - '0';
if (neg1) exp1 = -exp1;
e += exp1;
}
*endptr = cast(char *, s); /* valid up to here */
ret:
if (neg) r = -r;
return l_mathop(ldexp)(r, e);
}
#endif
int luaO_str2d (const char *s, size_t len, lua_Number *result) {
char *endptr; char *endptr;
*result = lua_str2number(s, &endptr); if (strpbrk(s, "nN")) /* reject 'inf' and 'nan' */
if (endptr == s) return 0; /* conversion failed */ return 0;
if (*endptr == 'x' || *endptr == 'X') /* maybe an hexadecimal constant? */ else if (strpbrk(s, "xX")) /* hexa? */
*result = cast_num(strtoul(s, &endptr, 16)); *result = lua_strx2number(s, &endptr);
if (*endptr == '\0') return 1; /* most common case */ else
while (isspace(cast(unsigned char, *endptr))) endptr++; *result = lua_str2number(s, &endptr);
if (*endptr != '\0') return 0; /* invalid trailing characters? */ if (endptr == s) return 0; /* nothing recognized */
return 1; while (lisspace(cast_uchar(*endptr))) endptr++;
return (endptr == s + len); /* OK if no trailing characters */
} }
static void pushstr (lua_State *L, const char *str) { static void pushstr (lua_State *L, const char *str, size_t l) {
setsvalue2s(L, L->top, luaS_new(L, str)); setsvalue2s(L, L->top++, luaS_newlstr(L, str, l));
incr_top(L);
} }
/* this function handles only `%d', `%c', %f, %p, and `%s' formats */ /* this function handles only `%d', `%c', %f, %p, and `%s' formats */
const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) { const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
int n = 1; int n = 0;
pushstr(L, "");
for (;;) { for (;;) {
const char *e = strchr(fmt, '%'); const char *e = strchr(fmt, '%');
if (e == NULL) break; if (e == NULL) break;
setsvalue2s(L, L->top, luaS_newlstr(L, fmt, e-fmt)); luaD_checkstack(L, 2); /* fmt + item */
incr_top(L); pushstr(L, fmt, e - fmt);
switch (*(e+1)) { switch (*(e+1)) {
case 's': { case 's': {
const char *s = va_arg(argp, char *); const char *s = va_arg(argp, char *);
if (s == NULL) s = "(null)"; if (s == NULL) s = "(null)";
pushstr(L, s); pushstr(L, s, strlen(s));
break; break;
} }
case 'c': { case 'c': {
char buff[2]; char buff;
buff[0] = cast(char, va_arg(argp, int)); buff = cast(char, va_arg(argp, int));
buff[1] = '\0'; pushstr(L, &buff, 1);
pushstr(L, buff);
break; break;
} }
case 'd': { case 'd': {
setnvalue(L->top, cast_num(va_arg(argp, int))); setnvalue(L->top++, cast_num(va_arg(argp, int)));
incr_top(L);
break; break;
} }
case 'f': { case 'f': {
setnvalue(L->top, cast_num(va_arg(argp, l_uacNumber))); setnvalue(L->top++, cast_num(va_arg(argp, l_uacNumber)));
incr_top(L);
break; break;
} }
case 'p': { case 'p': {
char buff[4*sizeof(void *) + 8]; /* should be enough space for a `%p' */ char buff[4*sizeof(void *) + 8]; /* should be enough space for a `%p' */
snprintf(buff, 4*sizeof(void *) + 8, "%p", va_arg(argp, void *)); int l = snprintf(buff, sizeof(buff), "%p", va_arg(argp, void *));
pushstr(L, buff); pushstr(L, buff, l);
break; break;
} }
case '%': { case '%': {
pushstr(L, "%"); pushstr(L, "%", 1);
break; break;
} }
default: { default: {
char buff[3]; luaG_runerror(L,
buff[0] = '%'; "invalid option " LUA_QL("%%%c") " to " LUA_QL("lua_pushfstring"),
buff[1] = *(e+1); *(e + 1));
buff[2] = '\0';
pushstr(L, buff);
break;
} }
} }
n += 2; n += 2;
fmt = e+2; fmt = e+2;
} }
pushstr(L, fmt); luaD_checkstack(L, 1);
luaV_concat(L, n+1, cast_int(L->top - L->base) - 1); pushstr(L, fmt, strlen(fmt));
L->top -= n; if (n > 0) luaV_concat(L, n + 1);
return svalue(L->top - 1); return svalue(L->top - 1);
} }
@ -179,36 +241,48 @@ const char *luaO_pushfstring (lua_State *L, const char *fmt, ...) {
} }
/* number of chars of a literal string without the ending \0 */
#define LL(x) (sizeof(x)/sizeof(char) - 1)
#define RETS "..."
#define PRE "[string \""
#define POS "\"]"
#define addstr(a,b,l) ( memcpy(a,b,(l) * sizeof(char)), a += (l) )
void luaO_chunkid (char *out, const char *source, size_t bufflen) { void luaO_chunkid (char *out, const char *source, size_t bufflen) {
if (*source == '=') { size_t l = strlen(source);
strncpy(out, source+1, bufflen); /* remove first char */ if (*source == '=') { /* 'literal' source */
out[bufflen-1] = '\0'; /* ensures null termination */ if (l <= bufflen) /* small enough? */
memcpy(out, source + 1, l * sizeof(char));
else { /* truncate it */
addstr(out, source + 1, bufflen - 1);
*out = '\0';
}
} }
else { /* out = "source", or "...source" */ else if (*source == '@') { /* file name */
if (*source == '@') { if (l <= bufflen) /* small enough? */
size_t l; memcpy(out, source + 1, l * sizeof(char));
source++; /* skip the `@' */ else { /* add '...' before rest of name */
bufflen -= sizeof(" '...' "); addstr(out, RETS, LL(RETS));
l = strlen(source); bufflen -= LL(RETS);
strcpy(out, ""); memcpy(out, source + 1 + l - bufflen, bufflen * sizeof(char));
if (l > bufflen) {
source += (l-bufflen); /* get last part of file name */
strcat(out, "...");
}
strcat(out, source);
} }
else { /* out = [string "string"] */ }
size_t len = strcspn(source, "\n\r"); /* stop at first newline */ else { /* string; format as [string "source"] */
bufflen -= sizeof(" [string \"...\"] "); const char *nl = strchr(source, '\n'); /* find first new line (if any) */
if (len > bufflen) len = bufflen; addstr(out, PRE, LL(PRE)); /* add prefix */
strcpy(out, "[string \""); bufflen -= LL(PRE RETS POS) + 1; /* save space for prefix+suffix+'\0' */
if (source[len] != '\0') { /* must truncate? */ if (l < bufflen && nl == NULL) { /* small one-line source? */
strncat(out, source, len); addstr(out, source, l); /* keep it */
strcat(out, "...");
}
else
strcat(out, source);
strcat(out, "\"]");
} }
else {
if (nl != NULL) l = nl - source; /* stop at first newline */
if (l > bufflen) l = bufflen;
addstr(out, source, l);
addstr(out, RETS, LL(RETS));
}
memcpy(out, POS, (LL(POS) + 1) * sizeof(char));
} }
} }

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: lobject.h,v 2.71.1.1 2013/04/12 18:48:47 roberto Exp $
** Type definitions for Lua objects ** Type definitions for Lua objects
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -16,18 +16,52 @@
#include "lua.h" #include "lua.h"
/* tags for values visible from Lua */
#define LAST_TAG LUA_TTHREAD
#define NUM_TAGS (LAST_TAG+1)
/* /*
** Extra tags for non-values ** Extra tags for non-values
*/ */
#define LUA_TPROTO (LAST_TAG+1) #define LUA_TPROTO LUA_NUMTAGS
#define LUA_TUPVAL (LAST_TAG+2) #define LUA_TUPVAL (LUA_NUMTAGS+1)
#define LUA_TDEADKEY (LAST_TAG+3) #define LUA_TDEADKEY (LUA_NUMTAGS+2)
/*
** number of all possible tags (including LUA_TNONE but excluding DEADKEY)
*/
#define LUA_TOTALTAGS (LUA_TUPVAL+2)
/*
** tags for Tagged Values have the following use of bits:
** bits 0-3: actual tag (a LUA_T* value)
** bits 4-5: variant bits
** bit 6: whether value is collectable
*/
#define VARBITS (3 << 4)
/*
** LUA_TFUNCTION variants:
** 0 - Lua function
** 1 - light C function
** 2 - regular C function (closure)
*/
/* Variant tags for functions */
#define LUA_TLCL (LUA_TFUNCTION | (0 << 4)) /* Lua closure */
#define LUA_TLCF (LUA_TFUNCTION | (1 << 4)) /* light C function */
#define LUA_TCCL (LUA_TFUNCTION | (2 << 4)) /* C closure */
/* Variant tags for strings */
#define LUA_TSHRSTR (LUA_TSTRING | (0 << 4)) /* short strings */
#define LUA_TLNGSTR (LUA_TSTRING | (1 << 4)) /* long strings */
/* Bit mark for collectable types */
#define BIT_ISCOLLECTABLE (1 << 6)
/* mark a tag as collectable */
#define ctb(t) ((t) | BIT_ISCOLLECTABLE)
/* /*
@ -52,120 +86,165 @@ typedef struct GCheader {
/* /*
** Union of all Lua values ** Union of all Lua values
*/ */
typedef union { typedef union Value Value;
GCObject *gc;
void *p;
lua_Number n; #define numfield lua_Number n; /* numbers */
int b;
} Value;
/* /*
** Tagged Values ** Tagged Values. This is the basic representation of values in Lua,
** an actual value plus a tag with its type.
*/ */
#define TValuefields Value value; int tt #define TValuefields Value value_; int tt_
typedef struct lua_TValue { typedef struct lua_TValue TValue;
TValuefields;
} TValue;
/* macro defining a nil value */
#define NILCONSTANT {NULL}, LUA_TNIL
#define val_(o) ((o)->value_)
#define num_(o) (val_(o).n)
/* raw type tag of a TValue */
#define rttype(o) ((o)->tt_)
/* tag with no variants (bits 0-3) */
#define novariant(x) ((x) & 0x0F)
/* type tag of a TValue (bits 0-3 for tags + variant bits 4-5) */
#define ttype(o) (rttype(o) & 0x3F)
/* type tag of a TValue with no variants (bits 0-3) */
#define ttypenv(o) (novariant(rttype(o)))
/* Macros to test type */ /* Macros to test type */
#define ttisnil(o) (ttype(o) == LUA_TNIL) #define checktag(o,t) (rttype(o) == (t))
#define ttisnumber(o) (ttype(o) == LUA_TNUMBER) #define checktype(o,t) (ttypenv(o) == (t))
#define ttisstring(o) (ttype(o) == LUA_TSTRING) #define ttisnumber(o) checktag((o), LUA_TNUMBER)
#define ttistable(o) (ttype(o) == LUA_TTABLE) #define ttisnil(o) checktag((o), LUA_TNIL)
#define ttisfunction(o) (ttype(o) == LUA_TFUNCTION) #define ttisboolean(o) checktag((o), LUA_TBOOLEAN)
#define ttisboolean(o) (ttype(o) == LUA_TBOOLEAN) #define ttislightuserdata(o) checktag((o), LUA_TLIGHTUSERDATA)
#define ttisuserdata(o) (ttype(o) == LUA_TUSERDATA) #define ttisstring(o) checktype((o), LUA_TSTRING)
#define ttisthread(o) (ttype(o) == LUA_TTHREAD) #define ttisshrstring(o) checktag((o), ctb(LUA_TSHRSTR))
#define ttislightuserdata(o) (ttype(o) == LUA_TLIGHTUSERDATA) #define ttislngstring(o) checktag((o), ctb(LUA_TLNGSTR))
#define ttistable(o) checktag((o), ctb(LUA_TTABLE))
#define ttisfunction(o) checktype(o, LUA_TFUNCTION)
#define ttisclosure(o) ((rttype(o) & 0x1F) == LUA_TFUNCTION)
#define ttisCclosure(o) checktag((o), ctb(LUA_TCCL))
#define ttisLclosure(o) checktag((o), ctb(LUA_TLCL))
#define ttislcf(o) checktag((o), LUA_TLCF)
#define ttisuserdata(o) checktag((o), ctb(LUA_TUSERDATA))
#define ttisthread(o) checktag((o), ctb(LUA_TTHREAD))
#define ttisdeadkey(o) checktag((o), LUA_TDEADKEY)
#define ttisequal(o1,o2) (rttype(o1) == rttype(o2))
/* Macros to access values */ /* Macros to access values */
#define ttype(o) ((o)->tt) #define nvalue(o) check_exp(ttisnumber(o), num_(o))
#define gcvalue(o) check_exp(iscollectable(o), (o)->value.gc) #define gcvalue(o) check_exp(iscollectable(o), val_(o).gc)
#define pvalue(o) check_exp(ttislightuserdata(o), (o)->value.p) #define pvalue(o) check_exp(ttislightuserdata(o), val_(o).p)
#define nvalue(o) check_exp(ttisnumber(o), (o)->value.n) #define rawtsvalue(o) check_exp(ttisstring(o), &val_(o).gc->ts)
#define rawtsvalue(o) check_exp(ttisstring(o), &(o)->value.gc->ts)
#define tsvalue(o) (&rawtsvalue(o)->tsv) #define tsvalue(o) (&rawtsvalue(o)->tsv)
#define rawuvalue(o) check_exp(ttisuserdata(o), &(o)->value.gc->u) #define rawuvalue(o) check_exp(ttisuserdata(o), &val_(o).gc->u)
#define uvalue(o) (&rawuvalue(o)->uv) #define uvalue(o) (&rawuvalue(o)->uv)
#define clvalue(o) check_exp(ttisfunction(o), &(o)->value.gc->cl) #define clvalue(o) check_exp(ttisclosure(o), &val_(o).gc->cl)
#define hvalue(o) check_exp(ttistable(o), &(o)->value.gc->h) #define clLvalue(o) check_exp(ttisLclosure(o), &val_(o).gc->cl.l)
#define bvalue(o) check_exp(ttisboolean(o), (o)->value.b) #define clCvalue(o) check_exp(ttisCclosure(o), &val_(o).gc->cl.c)
#define thvalue(o) check_exp(ttisthread(o), &(o)->value.gc->th) #define fvalue(o) check_exp(ttislcf(o), val_(o).f)
#define hvalue(o) check_exp(ttistable(o), &val_(o).gc->h)
#define bvalue(o) check_exp(ttisboolean(o), val_(o).b)
#define thvalue(o) check_exp(ttisthread(o), &val_(o).gc->th)
/* a dead value may get the 'gc' field, but cannot access its contents */
#define deadvalue(o) check_exp(ttisdeadkey(o), cast(void *, val_(o).gc))
#define l_isfalse(o) (ttisnil(o) || (ttisboolean(o) && bvalue(o) == 0)) #define l_isfalse(o) (ttisnil(o) || (ttisboolean(o) && bvalue(o) == 0))
/*
** for internal debug only #define iscollectable(o) (rttype(o) & BIT_ISCOLLECTABLE)
*/
#define checkconsistency(obj) \
lua_assert(!iscollectable(obj) || (ttype(obj) == (obj)->value.gc->gch.tt)) /* Macros for internal tests */
#define righttt(obj) (ttype(obj) == gcvalue(obj)->gch.tt)
#define checkliveness(g,obj) \ #define checkliveness(g,obj) \
lua_assert(!iscollectable(obj) || \ lua_longassert(!iscollectable(obj) || \
((ttype(obj) == (obj)->value.gc->gch.tt) && !isdead(g, (obj)->value.gc))) (righttt(obj) && !isdead(g,gcvalue(obj))))
/* Macros to set values */ /* Macros to set values */
#define setnilvalue(obj) ((obj)->tt=LUA_TNIL) #define settt_(o,t) ((o)->tt_=(t))
#define setnvalue(obj,x) \ #define setnvalue(obj,x) \
{ TValue *i_o=(obj); i_o->value.n=(x); i_o->tt=LUA_TNUMBER; } { TValue *io=(obj); num_(io)=(x); settt_(io, LUA_TNUMBER); }
#define setnilvalue(obj) settt_(obj, LUA_TNIL)
#define setfvalue(obj,x) \
{ TValue *io=(obj); val_(io).f=(x); settt_(io, LUA_TLCF); }
#define setpvalue(obj,x) \ #define setpvalue(obj,x) \
{ TValue *i_o=(obj); i_o->value.p=(x); i_o->tt=LUA_TLIGHTUSERDATA; } { TValue *io=(obj); val_(io).p=(x); settt_(io, LUA_TLIGHTUSERDATA); }
#define setbvalue(obj,x) \ #define setbvalue(obj,x) \
{ TValue *i_o=(obj); i_o->value.b=(x); i_o->tt=LUA_TBOOLEAN; } { TValue *io=(obj); val_(io).b=(x); settt_(io, LUA_TBOOLEAN); }
#define setgcovalue(L,obj,x) \
{ TValue *io=(obj); GCObject *i_g=(x); \
val_(io).gc=i_g; settt_(io, ctb(gch(i_g)->tt)); }
#define setsvalue(L,obj,x) \ #define setsvalue(L,obj,x) \
{ TValue *i_o=(obj); \ { TValue *io=(obj); \
i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TSTRING; \ TString *x_ = (x); \
checkliveness(G(L),i_o); } val_(io).gc=cast(GCObject *, x_); settt_(io, ctb(x_->tsv.tt)); \
checkliveness(G(L),io); }
#define setuvalue(L,obj,x) \ #define setuvalue(L,obj,x) \
{ TValue *i_o=(obj); \ { TValue *io=(obj); \
i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TUSERDATA; \ val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TUSERDATA)); \
checkliveness(G(L),i_o); } checkliveness(G(L),io); }
#define setthvalue(L,obj,x) \ #define setthvalue(L,obj,x) \
{ TValue *i_o=(obj); \ { TValue *io=(obj); \
i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TTHREAD; \ val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TTHREAD)); \
checkliveness(G(L),i_o); } checkliveness(G(L),io); }
#define setclvalue(L,obj,x) \ #define setclLvalue(L,obj,x) \
{ TValue *i_o=(obj); \ { TValue *io=(obj); \
i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TFUNCTION; \ val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TLCL)); \
checkliveness(G(L),i_o); } checkliveness(G(L),io); }
#define setclCvalue(L,obj,x) \
{ TValue *io=(obj); \
val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TCCL)); \
checkliveness(G(L),io); }
#define sethvalue(L,obj,x) \ #define sethvalue(L,obj,x) \
{ TValue *i_o=(obj); \ { TValue *io=(obj); \
i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TTABLE; \ val_(io).gc=cast(GCObject *, (x)); settt_(io, ctb(LUA_TTABLE)); \
checkliveness(G(L),i_o); } checkliveness(G(L),io); }
#define setptvalue(L,obj,x) \
{ TValue *i_o=(obj); \
i_o->value.gc=cast(GCObject *, (x)); i_o->tt=LUA_TPROTO; \
checkliveness(G(L),i_o); }
#define setdeadvalue(obj) settt_(obj, LUA_TDEADKEY)
#define setobj(L,obj1,obj2) \ #define setobj(L,obj1,obj2) \
{ const TValue *o2=(obj2); TValue *o1=(obj1); \ { const TValue *io2=(obj2); TValue *io1=(obj1); \
o1->value = o2->value; o1->tt=o2->tt; \ io1->value_ = io2->value_; io1->tt_ = io2->tt_; \
checkliveness(G(L),o1); } checkliveness(G(L),io1); }
/* /*
** different types of sets, according to destination ** different types of assignments, according to destination
*/ */
/* from stack to (same) stack */ /* from stack to (same) stack */
@ -183,47 +262,204 @@ typedef struct lua_TValue {
#define setobj2n setobj #define setobj2n setobj
#define setsvalue2n setsvalue #define setsvalue2n setsvalue
#define setttype(obj, tt) (ttype(obj) = (tt))
/* check whether a number is valid (useful only for NaN trick) */
#define luai_checknum(L,o,c) { /* empty */ }
#define iscollectable(o) (ttype(o) >= LUA_TSTRING) /*
** {======================================================
** NaN Trick
** =======================================================
*/
#if defined(LUA_NANTRICK)
/*
** numbers are represented in the 'd_' field. All other values have the
** value (NNMARK | tag) in 'tt__'. A number with such pattern would be
** a "signaled NaN", which is never generated by regular operations by
** the CPU (nor by 'strtod')
*/
/* allows for external implementation for part of the trick */
#if !defined(NNMARK) /* { */
#if !defined(LUA_IEEEENDIAN)
#error option 'LUA_NANTRICK' needs 'LUA_IEEEENDIAN'
#endif
#define NNMARK 0x7FF7A500
#define NNMASK 0x7FFFFF00
#undef TValuefields
#undef NILCONSTANT
#if (LUA_IEEEENDIAN == 0) /* { */
/* little endian */
#define TValuefields \
union { struct { Value v__; int tt__; } i; double d__; } u
#define NILCONSTANT {{{NULL}, tag2tt(LUA_TNIL)}}
/* field-access macros */
#define v_(o) ((o)->u.i.v__)
#define d_(o) ((o)->u.d__)
#define tt_(o) ((o)->u.i.tt__)
#else /* }{ */
/* big endian */
#define TValuefields \
union { struct { int tt__; Value v__; } i; double d__; } u
#define NILCONSTANT {{tag2tt(LUA_TNIL), {NULL}}}
/* field-access macros */
#define v_(o) ((o)->u.i.v__)
#define d_(o) ((o)->u.d__)
#define tt_(o) ((o)->u.i.tt__)
#endif /* } */
#endif /* } */
/* correspondence with standard representation */
#undef val_
#define val_(o) v_(o)
#undef num_
#define num_(o) d_(o)
#undef numfield
#define numfield /* no such field; numbers are the entire struct */
/* basic check to distinguish numbers from non-numbers */
#undef ttisnumber
#define ttisnumber(o) ((tt_(o) & NNMASK) != NNMARK)
#define tag2tt(t) (NNMARK | (t))
#undef rttype
#define rttype(o) (ttisnumber(o) ? LUA_TNUMBER : tt_(o) & 0xff)
#undef settt_
#define settt_(o,t) (tt_(o) = tag2tt(t))
#undef setnvalue
#define setnvalue(obj,x) \
{ TValue *io_=(obj); num_(io_)=(x); lua_assert(ttisnumber(io_)); }
#undef setobj
#define setobj(L,obj1,obj2) \
{ const TValue *o2_=(obj2); TValue *o1_=(obj1); \
o1_->u = o2_->u; \
checkliveness(G(L),o1_); }
/*
** these redefinitions are not mandatory, but these forms are more efficient
*/
#undef checktag
#undef checktype
#define checktag(o,t) (tt_(o) == tag2tt(t))
#define checktype(o,t) (ctb(tt_(o) | VARBITS) == ctb(tag2tt(t) | VARBITS))
#undef ttisequal
#define ttisequal(o1,o2) \
(ttisnumber(o1) ? ttisnumber(o2) : (tt_(o1) == tt_(o2)))
#undef luai_checknum
#define luai_checknum(L,o,c) { if (!ttisnumber(o)) c; }
#endif
/* }====================================================== */
/*
** {======================================================
** types and prototypes
** =======================================================
*/
union Value {
GCObject *gc; /* collectable objects */
void *p; /* light userdata */
int b; /* booleans */
lua_CFunction f; /* light C functions */
numfield /* numbers */
};
struct lua_TValue {
TValuefields;
};
typedef TValue *StkId; /* index to stack elements */ typedef TValue *StkId; /* index to stack elements */
/* /*
** String headers for string table ** Header for string value; string bytes follow the end of this structure
*/ */
typedef union TString { typedef union TString {
L_Umaxalign dummy; /* ensures maximum alignment for strings */ L_Umaxalign dummy; /* ensures maximum alignment for strings */
struct { struct {
CommonHeader; CommonHeader;
lu_byte reserved; lu_byte extra; /* reserved words for short strings; "has hash" for longs */
unsigned int hash; unsigned int hash;
size_t len; size_t len; /* number of characters in string */
} tsv; } tsv;
} TString; } TString;
/* get the actual string (array of bytes) from a TString */
#define getstr(ts) cast(const char *, (ts) + 1) #define getstr(ts) cast(const char *, (ts) + 1)
/* get the actual string (array of bytes) from a Lua value */
#define svalue(o) getstr(rawtsvalue(o)) #define svalue(o) getstr(rawtsvalue(o))
/*
** Header for userdata; memory area follows the end of this structure
*/
typedef union Udata { typedef union Udata {
L_Umaxalign dummy; /* ensures maximum alignment for `local' udata */ L_Umaxalign dummy; /* ensures maximum alignment for `local' udata */
struct { struct {
CommonHeader; CommonHeader;
struct Table *metatable; struct Table *metatable;
struct Table *env; struct Table *env;
size_t len; size_t len; /* number of bytes */
} uv; } uv;
} Udata; } Udata;
/*
** Description of an upvalue for function prototypes
*/
typedef struct Upvaldesc {
TString *name; /* upvalue name (for debug information) */
lu_byte instack; /* whether it is in stack */
lu_byte idx; /* index of upvalue (in stack or in outer function's list) */
} Upvaldesc;
/*
** Description of a local variable for function prototypes
** (used for debug information)
*/
typedef struct LocVar {
TString *varname;
int startpc; /* first point where variable is active */
int endpc; /* first point where variable is dead */
} LocVar;
/* /*
** Function Prototypes ** Function Prototypes
@ -233,11 +469,12 @@ typedef struct Proto {
TValue *k; /* constants used by the function */ TValue *k; /* constants used by the function */
Instruction *code; Instruction *code;
struct Proto **p; /* functions defined inside the function */ struct Proto **p; /* functions defined inside the function */
int *lineinfo; /* map from opcodes to source lines */ int *lineinfo; /* map from opcodes to source lines (debug information) */
struct LocVar *locvars; /* information about local variables */ LocVar *locvars; /* information about local variables (debug information) */
TString **upvalues; /* upvalue names */ Upvaldesc *upvalues; /* upvalue information */
TString *source; union Closure *cache; /* last created closure with this prototype */
int sizeupvalues; TString *source; /* used for debug information */
int sizeupvalues; /* size of 'upvalues' */
int sizek; /* size of `k' */ int sizek; /* size of `k' */
int sizecode; int sizecode;
int sizelineinfo; int sizelineinfo;
@ -246,31 +483,16 @@ typedef struct Proto {
int linedefined; int linedefined;
int lastlinedefined; int lastlinedefined;
GCObject *gclist; GCObject *gclist;
lu_byte nups; /* number of upvalues */ lu_byte numparams; /* number of fixed parameters */
lu_byte numparams;
lu_byte is_vararg; lu_byte is_vararg;
lu_byte maxstacksize; lu_byte maxstacksize; /* maximum stack used by this function */
} Proto; } Proto;
/* masks for new-style vararg */
#define VARARG_HASARG 1
#define VARARG_ISVARARG 2
#define VARARG_NEEDSARG 4
typedef struct LocVar {
TString *varname;
int startpc; /* first point where variable is active */
int endpc; /* first point where variable is dead */
} LocVar;
/* /*
** Upvalues ** Lua Upvalues
*/ */
typedef struct UpVal { typedef struct UpVal {
CommonHeader; CommonHeader;
TValue *v; /* points to stack or to its own value */ TValue *v; /* points to stack or to its own value */
@ -289,20 +511,19 @@ typedef struct UpVal {
*/ */
#define ClosureHeader \ #define ClosureHeader \
CommonHeader; lu_byte isC; lu_byte nupvalues; GCObject *gclist; \ CommonHeader; lu_byte nupvalues; GCObject *gclist
struct Table *env
typedef struct CClosure { typedef struct CClosure {
ClosureHeader; ClosureHeader;
lua_CFunction f; lua_CFunction f;
TValue upvalue[1]; TValue upvalue[1]; /* list of upvalues */
} CClosure; } CClosure;
typedef struct LClosure { typedef struct LClosure {
ClosureHeader; ClosureHeader;
struct Proto *p; struct Proto *p;
UpVal *upvals[1]; UpVal *upvals[1]; /* list of upvalues */
} LClosure; } LClosure;
@ -312,8 +533,9 @@ typedef union Closure {
} Closure; } Closure;
#define iscfunction(o) (ttype(o) == LUA_TFUNCTION && clvalue(o)->c.isC) #define isLfunction(o) ttisLclosure(o)
#define isLfunction(o) (ttype(o) == LUA_TFUNCTION && !clvalue(o)->c.isC)
#define getproto(o) (clLvalue(o)->p)
/* /*
@ -337,7 +559,7 @@ typedef struct Node {
typedef struct Table { typedef struct Table {
CommonHeader; CommonHeader;
lu_byte flags; /* 1<<p means tagmethod(p) is not present */ lu_byte flags; /* 1<<p means tagmethod(p) is not present */
lu_byte lsizenode; /* log2 of size of `node' array */ lu_byte lsizenode; /* log2 of size of `node' array */
struct Table *metatable; struct Table *metatable;
TValue *array; /* array part */ TValue *array; /* array part */
@ -360,17 +582,21 @@ typedef struct Table {
#define sizenode(t) (twoto((t)->lsizenode)) #define sizenode(t) (twoto((t)->lsizenode))
/*
** (address of) a fixed nil value
*/
#define luaO_nilobject (&luaO_nilobject_) #define luaO_nilobject (&luaO_nilobject_)
LUAI_DATA const TValue luaO_nilobject_;
#define ceillog2(x) (luaO_log2((x)-1) + 1) LUAI_DDEC const TValue luaO_nilobject_;
LUAI_FUNC int luaO_log2 (unsigned int x);
LUAI_FUNC int luaO_int2fb (unsigned int x); LUAI_FUNC int luaO_int2fb (unsigned int x);
LUAI_FUNC int luaO_fb2int (int x); LUAI_FUNC int luaO_fb2int (int x);
LUAI_FUNC int luaO_rawequalObj (const TValue *t1, const TValue *t2); LUAI_FUNC int luaO_ceillog2 (unsigned int x);
LUAI_FUNC int luaO_str2d (const char *s, lua_Number *result); LUAI_FUNC lua_Number luaO_arith (int op, lua_Number v1, lua_Number v2);
LUAI_FUNC int luaO_str2d (const char *s, size_t len, lua_Number *result);
LUAI_FUNC int luaO_hexavalue (int c);
LUAI_FUNC const char *luaO_pushvfstring (lua_State *L, const char *fmt, LUAI_FUNC const char *luaO_pushvfstring (lua_State *L, const char *fmt,
va_list argp); va_list argp);
LUAI_FUNC const char *luaO_pushfstring (lua_State *L, const char *fmt, ...); LUAI_FUNC const char *luaO_pushfstring (lua_State *L, const char *fmt, ...);

View file

@ -1,5 +1,6 @@
/* /*
** $Id: lopcodes.c,v 1.37.1.1 2007/12/27 13:02:25 roberto Exp $ ** $Id: lopcodes.c,v 1.49.1.1 2013/04/12 18:48:47 roberto Exp $
** Opcodes for Lua virtual machine
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -13,15 +14,16 @@
/* ORDER OP */ /* ORDER OP */
const char *const luaP_opnames[NUM_OPCODES+1] = { LUAI_DDEF const char *const luaP_opnames[NUM_OPCODES+1] = {
"MOVE", "MOVE",
"LOADK", "LOADK",
"LOADKX",
"LOADBOOL", "LOADBOOL",
"LOADNIL", "LOADNIL",
"GETUPVAL", "GETUPVAL",
"GETGLOBAL", "GETTABUP",
"GETTABLE", "GETTABLE",
"SETGLOBAL", "SETTABUP",
"SETUPVAL", "SETUPVAL",
"SETTABLE", "SETTABLE",
"NEWTABLE", "NEWTABLE",
@ -47,27 +49,29 @@ const char *const luaP_opnames[NUM_OPCODES+1] = {
"RETURN", "RETURN",
"FORLOOP", "FORLOOP",
"FORPREP", "FORPREP",
"TFORCALL",
"TFORLOOP", "TFORLOOP",
"SETLIST", "SETLIST",
"CLOSE",
"CLOSURE", "CLOSURE",
"VARARG", "VARARG",
"EXTRAARG",
NULL NULL
}; };
#define opmode(t,a,b,c,m) (((t)<<7) | ((a)<<6) | ((b)<<4) | ((c)<<2) | (m)) #define opmode(t,a,b,c,m) (((t)<<7) | ((a)<<6) | ((b)<<4) | ((c)<<2) | (m))
const lu_byte luaP_opmodes[NUM_OPCODES] = { LUAI_DDEF const lu_byte luaP_opmodes[NUM_OPCODES] = {
/* T A B C mode opcode */ /* T A B C mode opcode */
opmode(0, 1, OpArgR, OpArgN, iABC) /* OP_MOVE */ opmode(0, 1, OpArgR, OpArgN, iABC) /* OP_MOVE */
,opmode(0, 1, OpArgK, OpArgN, iABx) /* OP_LOADK */ ,opmode(0, 1, OpArgK, OpArgN, iABx) /* OP_LOADK */
,opmode(0, 1, OpArgN, OpArgN, iABx) /* OP_LOADKX */
,opmode(0, 1, OpArgU, OpArgU, iABC) /* OP_LOADBOOL */ ,opmode(0, 1, OpArgU, OpArgU, iABC) /* OP_LOADBOOL */
,opmode(0, 1, OpArgR, OpArgN, iABC) /* OP_LOADNIL */ ,opmode(0, 1, OpArgU, OpArgN, iABC) /* OP_LOADNIL */
,opmode(0, 1, OpArgU, OpArgN, iABC) /* OP_GETUPVAL */ ,opmode(0, 1, OpArgU, OpArgN, iABC) /* OP_GETUPVAL */
,opmode(0, 1, OpArgK, OpArgN, iABx) /* OP_GETGLOBAL */ ,opmode(0, 1, OpArgU, OpArgK, iABC) /* OP_GETTABUP */
,opmode(0, 1, OpArgR, OpArgK, iABC) /* OP_GETTABLE */ ,opmode(0, 1, OpArgR, OpArgK, iABC) /* OP_GETTABLE */
,opmode(0, 0, OpArgK, OpArgN, iABx) /* OP_SETGLOBAL */ ,opmode(0, 0, OpArgK, OpArgK, iABC) /* OP_SETTABUP */
,opmode(0, 0, OpArgU, OpArgN, iABC) /* OP_SETUPVAL */ ,opmode(0, 0, OpArgU, OpArgN, iABC) /* OP_SETUPVAL */
,opmode(0, 0, OpArgK, OpArgK, iABC) /* OP_SETTABLE */ ,opmode(0, 0, OpArgK, OpArgK, iABC) /* OP_SETTABLE */
,opmode(0, 1, OpArgU, OpArgU, iABC) /* OP_NEWTABLE */ ,opmode(0, 1, OpArgU, OpArgU, iABC) /* OP_NEWTABLE */
@ -86,17 +90,18 @@ const lu_byte luaP_opmodes[NUM_OPCODES] = {
,opmode(1, 0, OpArgK, OpArgK, iABC) /* OP_EQ */ ,opmode(1, 0, OpArgK, OpArgK, iABC) /* OP_EQ */
,opmode(1, 0, OpArgK, OpArgK, iABC) /* OP_LT */ ,opmode(1, 0, OpArgK, OpArgK, iABC) /* OP_LT */
,opmode(1, 0, OpArgK, OpArgK, iABC) /* OP_LE */ ,opmode(1, 0, OpArgK, OpArgK, iABC) /* OP_LE */
,opmode(1, 1, OpArgR, OpArgU, iABC) /* OP_TEST */ ,opmode(1, 0, OpArgN, OpArgU, iABC) /* OP_TEST */
,opmode(1, 1, OpArgR, OpArgU, iABC) /* OP_TESTSET */ ,opmode(1, 1, OpArgR, OpArgU, iABC) /* OP_TESTSET */
,opmode(0, 1, OpArgU, OpArgU, iABC) /* OP_CALL */ ,opmode(0, 1, OpArgU, OpArgU, iABC) /* OP_CALL */
,opmode(0, 1, OpArgU, OpArgU, iABC) /* OP_TAILCALL */ ,opmode(0, 1, OpArgU, OpArgU, iABC) /* OP_TAILCALL */
,opmode(0, 0, OpArgU, OpArgN, iABC) /* OP_RETURN */ ,opmode(0, 0, OpArgU, OpArgN, iABC) /* OP_RETURN */
,opmode(0, 1, OpArgR, OpArgN, iAsBx) /* OP_FORLOOP */ ,opmode(0, 1, OpArgR, OpArgN, iAsBx) /* OP_FORLOOP */
,opmode(0, 1, OpArgR, OpArgN, iAsBx) /* OP_FORPREP */ ,opmode(0, 1, OpArgR, OpArgN, iAsBx) /* OP_FORPREP */
,opmode(1, 0, OpArgN, OpArgU, iABC) /* OP_TFORLOOP */ ,opmode(0, 0, OpArgN, OpArgU, iABC) /* OP_TFORCALL */
,opmode(0, 1, OpArgR, OpArgN, iAsBx) /* OP_TFORLOOP */
,opmode(0, 0, OpArgU, OpArgU, iABC) /* OP_SETLIST */ ,opmode(0, 0, OpArgU, OpArgU, iABC) /* OP_SETLIST */
,opmode(0, 0, OpArgN, OpArgN, iABC) /* OP_CLOSE */
,opmode(0, 1, OpArgU, OpArgN, iABx) /* OP_CLOSURE */ ,opmode(0, 1, OpArgU, OpArgN, iABx) /* OP_CLOSURE */
,opmode(0, 1, OpArgU, OpArgN, iABC) /* OP_VARARG */ ,opmode(0, 1, OpArgU, OpArgN, iABC) /* OP_VARARG */
,opmode(0, 0, OpArgU, OpArgU, iAx) /* OP_EXTRAARG */
}; };

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: lopcodes.h,v 1.142.1.1 2013/04/12 18:48:47 roberto Exp $
** Opcodes for Lua virtual machine ** Opcodes for Lua virtual machine
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -17,6 +17,7 @@
`A' : 8 bits `A' : 8 bits
`B' : 9 bits `B' : 9 bits
`C' : 9 bits `C' : 9 bits
'Ax' : 26 bits ('A', 'B', and 'C' together)
`Bx' : 18 bits (`B' and `C' together) `Bx' : 18 bits (`B' and `C' together)
`sBx' : signed Bx `sBx' : signed Bx
@ -28,7 +29,7 @@
===========================================================================*/ ===========================================================================*/
enum OpMode {iABC, iABx, iAsBx}; /* basic instruction format */ enum OpMode {iABC, iABx, iAsBx, iAx}; /* basic instruction format */
/* /*
@ -38,6 +39,7 @@ enum OpMode {iABC, iABx, iAsBx}; /* basic instruction format */
#define SIZE_B 9 #define SIZE_B 9
#define SIZE_Bx (SIZE_C + SIZE_B) #define SIZE_Bx (SIZE_C + SIZE_B)
#define SIZE_A 8 #define SIZE_A 8
#define SIZE_Ax (SIZE_C + SIZE_B + SIZE_A)
#define SIZE_OP 6 #define SIZE_OP 6
@ -46,6 +48,7 @@ enum OpMode {iABC, iABx, iAsBx}; /* basic instruction format */
#define POS_C (POS_A + SIZE_A) #define POS_C (POS_A + SIZE_A)
#define POS_B (POS_C + SIZE_C) #define POS_B (POS_C + SIZE_C)
#define POS_Bx POS_C #define POS_Bx POS_C
#define POS_Ax POS_A
/* /*
@ -61,6 +64,12 @@ enum OpMode {iABC, iABx, iAsBx}; /* basic instruction format */
#define MAXARG_sBx MAX_INT #define MAXARG_sBx MAX_INT
#endif #endif
#if SIZE_Ax < LUAI_BITSINT-1
#define MAXARG_Ax ((1<<SIZE_Ax)-1)
#else
#define MAXARG_Ax MAX_INT
#endif
#define MAXARG_A ((1<<SIZE_A)-1) #define MAXARG_A ((1<<SIZE_A)-1)
#define MAXARG_B ((1<<SIZE_B)-1) #define MAXARG_B ((1<<SIZE_B)-1)
@ -68,7 +77,7 @@ enum OpMode {iABC, iABx, iAsBx}; /* basic instruction format */
/* creates a mask with `n' 1 bits at position `p' */ /* creates a mask with `n' 1 bits at position `p' */
#define MASK1(n,p) ((~((~(Instruction)0)<<n))<<p) #define MASK1(n,p) ((~((~(Instruction)0)<<(n)))<<(p))
/* creates a mask with `n' 0 bits at position `p' */ /* creates a mask with `n' 0 bits at position `p' */
#define MASK0(n,p) (~MASK1(n,p)) #define MASK0(n,p) (~MASK1(n,p))
@ -81,21 +90,24 @@ enum OpMode {iABC, iABx, iAsBx}; /* basic instruction format */
#define SET_OPCODE(i,o) ((i) = (((i)&MASK0(SIZE_OP,POS_OP)) | \ #define SET_OPCODE(i,o) ((i) = (((i)&MASK0(SIZE_OP,POS_OP)) | \
((cast(Instruction, o)<<POS_OP)&MASK1(SIZE_OP,POS_OP)))) ((cast(Instruction, o)<<POS_OP)&MASK1(SIZE_OP,POS_OP))))
#define GETARG_A(i) (cast(int, ((i)>>POS_A) & MASK1(SIZE_A,0))) #define getarg(i,pos,size) (cast(int, ((i)>>pos) & MASK1(size,0)))
#define SETARG_A(i,u) ((i) = (((i)&MASK0(SIZE_A,POS_A)) | \ #define setarg(i,v,pos,size) ((i) = (((i)&MASK0(size,pos)) | \
((cast(Instruction, u)<<POS_A)&MASK1(SIZE_A,POS_A)))) ((cast(Instruction, v)<<pos)&MASK1(size,pos))))
#define GETARG_B(i) (cast(int, ((i)>>POS_B) & MASK1(SIZE_B,0))) #define GETARG_A(i) getarg(i, POS_A, SIZE_A)
#define SETARG_B(i,b) ((i) = (((i)&MASK0(SIZE_B,POS_B)) | \ #define SETARG_A(i,v) setarg(i, v, POS_A, SIZE_A)
((cast(Instruction, b)<<POS_B)&MASK1(SIZE_B,POS_B))))
#define GETARG_C(i) (cast(int, ((i)>>POS_C) & MASK1(SIZE_C,0))) #define GETARG_B(i) getarg(i, POS_B, SIZE_B)
#define SETARG_C(i,b) ((i) = (((i)&MASK0(SIZE_C,POS_C)) | \ #define SETARG_B(i,v) setarg(i, v, POS_B, SIZE_B)
((cast(Instruction, b)<<POS_C)&MASK1(SIZE_C,POS_C))))
#define GETARG_Bx(i) (cast(int, ((i)>>POS_Bx) & MASK1(SIZE_Bx,0))) #define GETARG_C(i) getarg(i, POS_C, SIZE_C)
#define SETARG_Bx(i,b) ((i) = (((i)&MASK0(SIZE_Bx,POS_Bx)) | \ #define SETARG_C(i,v) setarg(i, v, POS_C, SIZE_C)
((cast(Instruction, b)<<POS_Bx)&MASK1(SIZE_Bx,POS_Bx))))
#define GETARG_Bx(i) getarg(i, POS_Bx, SIZE_Bx)
#define SETARG_Bx(i,v) setarg(i, v, POS_Bx, SIZE_Bx)
#define GETARG_Ax(i) getarg(i, POS_Ax, SIZE_Ax)
#define SETARG_Ax(i,v) setarg(i, v, POS_Ax, SIZE_Ax)
#define GETARG_sBx(i) (GETARG_Bx(i)-MAXARG_sBx) #define GETARG_sBx(i) (GETARG_Bx(i)-MAXARG_sBx)
#define SETARG_sBx(i,b) SETARG_Bx((i),cast(unsigned int, (b)+MAXARG_sBx)) #define SETARG_sBx(i,b) SETARG_Bx((i),cast(unsigned int, (b)+MAXARG_sBx))
@ -110,6 +122,9 @@ enum OpMode {iABC, iABx, iAsBx}; /* basic instruction format */
| (cast(Instruction, a)<<POS_A) \ | (cast(Instruction, a)<<POS_A) \
| (cast(Instruction, bc)<<POS_Bx)) | (cast(Instruction, bc)<<POS_Bx))
#define CREATE_Ax(o,a) ((cast(Instruction, o)<<POS_OP) \
| (cast(Instruction, a)<<POS_Ax))
/* /*
** Macros to operate RK indices ** Macros to operate RK indices
@ -153,14 +168,15 @@ name args description
------------------------------------------------------------------------*/ ------------------------------------------------------------------------*/
OP_MOVE,/* A B R(A) := R(B) */ OP_MOVE,/* A B R(A) := R(B) */
OP_LOADK,/* A Bx R(A) := Kst(Bx) */ OP_LOADK,/* A Bx R(A) := Kst(Bx) */
OP_LOADKX,/* A R(A) := Kst(extra arg) */
OP_LOADBOOL,/* A B C R(A) := (Bool)B; if (C) pc++ */ OP_LOADBOOL,/* A B C R(A) := (Bool)B; if (C) pc++ */
OP_LOADNIL,/* A B R(A) := ... := R(B) := nil */ OP_LOADNIL,/* A B R(A), R(A+1), ..., R(A+B) := nil */
OP_GETUPVAL,/* A B R(A) := UpValue[B] */ OP_GETUPVAL,/* A B R(A) := UpValue[B] */
OP_GETGLOBAL,/* A Bx R(A) := Gbl[Kst(Bx)] */ OP_GETTABUP,/* A B C R(A) := UpValue[B][RK(C)] */
OP_GETTABLE,/* A B C R(A) := R(B)[RK(C)] */ OP_GETTABLE,/* A B C R(A) := R(B)[RK(C)] */
OP_SETGLOBAL,/* A Bx Gbl[Kst(Bx)] := R(A) */ OP_SETTABUP,/* A B C UpValue[A][RK(B)] := RK(C) */
OP_SETUPVAL,/* A B UpValue[B] := R(A) */ OP_SETUPVAL,/* A B UpValue[B] := R(A) */
OP_SETTABLE,/* A B C R(A)[RK(B)] := RK(C) */ OP_SETTABLE,/* A B C R(A)[RK(B)] := RK(C) */
@ -180,14 +196,13 @@ OP_LEN,/* A B R(A) := length of R(B) */
OP_CONCAT,/* A B C R(A) := R(B).. ... ..R(C) */ OP_CONCAT,/* A B C R(A) := R(B).. ... ..R(C) */
OP_JMP,/* sBx pc+=sBx */ OP_JMP,/* A sBx pc+=sBx; if (A) close all upvalues >= R(A) + 1 */
OP_EQ,/* A B C if ((RK(B) == RK(C)) ~= A) then pc++ */ OP_EQ,/* A B C if ((RK(B) == RK(C)) ~= A) then pc++ */
OP_LT,/* A B C if ((RK(B) < RK(C)) ~= A) then pc++ */ OP_LT,/* A B C if ((RK(B) < RK(C)) ~= A) then pc++ */
OP_LE,/* A B C if ((RK(B) <= RK(C)) ~= A) then pc++ */ OP_LE,/* A B C if ((RK(B) <= RK(C)) ~= A) then pc++ */
OP_TEST,/* A C if not (R(A) <=> C) then pc++ */ OP_TEST,/* A C if not (R(A) <=> C) then pc++ */
OP_TESTSET,/* A B C if (R(B) <=> C) then R(A) := R(B) else pc++ */ OP_TESTSET,/* A B C if (R(B) <=> C) then R(A) := R(B) else pc++ */
OP_CALL,/* A B C R(A), ... ,R(A+C-2) := R(A)(R(A+1), ... ,R(A+B-1)) */ OP_CALL,/* A B C R(A), ... ,R(A+C-2) := R(A)(R(A+1), ... ,R(A+B-1)) */
OP_TAILCALL,/* A B C return R(A)(R(A+1), ... ,R(A+B-1)) */ OP_TAILCALL,/* A B C return R(A)(R(A+1), ... ,R(A+B-1)) */
@ -197,39 +212,44 @@ OP_FORLOOP,/* A sBx R(A)+=R(A+2);
if R(A) <?= R(A+1) then { pc+=sBx; R(A+3)=R(A) }*/ if R(A) <?= R(A+1) then { pc+=sBx; R(A+3)=R(A) }*/
OP_FORPREP,/* A sBx R(A)-=R(A+2); pc+=sBx */ OP_FORPREP,/* A sBx R(A)-=R(A+2); pc+=sBx */
OP_TFORLOOP,/* A C R(A+3), ... ,R(A+2+C) := R(A)(R(A+1), R(A+2)); OP_TFORCALL,/* A C R(A+3), ... ,R(A+2+C) := R(A)(R(A+1), R(A+2)); */
if R(A+3) ~= nil then R(A+2)=R(A+3) else pc++ */ OP_TFORLOOP,/* A sBx if R(A+1) ~= nil then { R(A)=R(A+1); pc += sBx }*/
OP_SETLIST,/* A B C R(A)[(C-1)*FPF+i] := R(A+i), 1 <= i <= B */ OP_SETLIST,/* A B C R(A)[(C-1)*FPF+i] := R(A+i), 1 <= i <= B */
OP_CLOSE,/* A close all variables in the stack up to (>=) R(A)*/ OP_CLOSURE,/* A Bx R(A) := closure(KPROTO[Bx]) */
OP_CLOSURE,/* A Bx R(A) := closure(KPROTO[Bx], R(A), ... ,R(A+n)) */
OP_VARARG/* A B R(A), R(A+1), ..., R(A+B-1) = vararg */ OP_VARARG,/* A B R(A), R(A+1), ..., R(A+B-2) = vararg */
OP_EXTRAARG/* Ax extra (larger) argument for previous opcode */
} OpCode; } OpCode;
#define NUM_OPCODES (cast(int, OP_VARARG) + 1) #define NUM_OPCODES (cast(int, OP_EXTRAARG) + 1)
/*=========================================================================== /*===========================================================================
Notes: Notes:
(*) In OP_CALL, if (B == 0) then B = top. C is the number of returns - 1, (*) In OP_CALL, if (B == 0) then B = top. If (C == 0), then `top' is
and can be 0: OP_CALL then sets `top' to last_result+1, so set to last_result+1, so next open instruction (OP_CALL, OP_RETURN,
next open instruction (OP_CALL, OP_RETURN, OP_SETLIST) may use `top'. OP_SETLIST) may use `top'.
(*) In OP_VARARG, if (B == 0) then use actual number of varargs and (*) In OP_VARARG, if (B == 0) then use actual number of varargs and
set top (like in OP_CALL with C == 0). set top (like in OP_CALL with C == 0).
(*) In OP_RETURN, if (B == 0) then return up to `top' (*) In OP_RETURN, if (B == 0) then return up to `top'.
(*) In OP_SETLIST, if (B == 0) then B = `top'; (*) In OP_SETLIST, if (B == 0) then B = `top'; if (C == 0) then next
if (C == 0) then next `instruction' is real C 'instruction' is EXTRAARG(real C).
(*) In OP_LOADKX, the next 'instruction' is always EXTRAARG.
(*) For comparisons, A specifies what condition the test should accept (*) For comparisons, A specifies what condition the test should accept
(true or false). (true or false).
(*) All `skips' (pc++) assume that next instruction is a jump.
(*) All `skips' (pc++) assume that next instruction is a jump
===========================================================================*/ ===========================================================================*/
@ -239,8 +259,8 @@ OP_VARARG/* A B R(A), R(A+1), ..., R(A+B-1) = vararg */
** bits 2-3: C arg mode ** bits 2-3: C arg mode
** bits 4-5: B arg mode ** bits 4-5: B arg mode
** bit 6: instruction set register A ** bit 6: instruction set register A
** bit 7: operator is a test ** bit 7: operator is a test (next instruction must be a jump)
*/ */
enum OpArgMask { enum OpArgMask {
OpArgN, /* argument is not used */ OpArgN, /* argument is not used */
@ -249,7 +269,7 @@ enum OpArgMask {
OpArgK /* argument is a constant or register/constant */ OpArgK /* argument is a constant or register/constant */
}; };
LUAI_DATA const lu_byte luaP_opmodes[NUM_OPCODES]; LUAI_DDEC const lu_byte luaP_opmodes[NUM_OPCODES];
#define getOpMode(m) (cast(enum OpMode, luaP_opmodes[m] & 3)) #define getOpMode(m) (cast(enum OpMode, luaP_opmodes[m] & 3))
#define getBMode(m) (cast(enum OpArgMask, (luaP_opmodes[m] >> 4) & 3)) #define getBMode(m) (cast(enum OpArgMask, (luaP_opmodes[m] >> 4) & 3))
@ -258,7 +278,7 @@ LUAI_DATA const lu_byte luaP_opmodes[NUM_OPCODES];
#define testTMode(m) (luaP_opmodes[m] & (1 << 7)) #define testTMode(m) (luaP_opmodes[m] & (1 << 7))
LUAI_DATA const char *const luaP_opnames[NUM_OPCODES+1]; /* opcode names */ LUAI_DDEC const char *const luaP_opnames[NUM_OPCODES+1]; /* opcode names */
/* number of list items to accumulate before a SETLIST instruction */ /* number of list items to accumulate before a SETLIST instruction */

View file

@ -1,5 +1,5 @@
/* /*
** $Id: loslib.c,v 1.19.1.3 2008/01/18 16:38:18 roberto Exp $ ** $Id: loslib.c,v 1.40.1.1 2013/04/12 18:48:47 roberto Exp $
** Standard Operating System library ** Standard Operating System library
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -19,31 +19,109 @@
#include "lualib.h" #include "lualib.h"
static int os_pushresult (lua_State *L, int i, const char *filename) { /*
int en = errno; /* calls to Lua API may change this value */ ** list of valid conversion specifiers for the 'strftime' function
if (i) { */
lua_pushboolean(L, 1); #if !defined(LUA_STRFTIMEOPTIONS)
return 1;
} #if !defined(LUA_USE_POSIX)
#define LUA_STRFTIMEOPTIONS { "aAbBcdHIjmMpSUwWxXyYz%", "" }
#else
#define LUA_STRFTIMEOPTIONS \
{ "aAbBcCdDeFgGhHIjmMnprRStTuUVwWxXyYzZ%", "" \
"", "E", "cCxXyY", \
"O", "deHImMSuUVwWy" }
#endif
#endif
/*
** By default, Lua uses tmpnam except when POSIX is available, where it
** uses mkstemp.
*/
#if defined(LUA_USE_MKSTEMP)
#include <unistd.h>
#define LUA_TMPNAMBUFSIZE 32
#define lua_tmpnam(b,e) { \
strcpy(b, "/tmp/lua_XXXXXX"); \
e = mkstemp(b); \
if (e != -1) close(e); \
e = (e == -1); }
#elif !defined(lua_tmpnam)
#define LUA_TMPNAMBUFSIZE L_tmpnam
#define lua_tmpnam(b,e) { e = (tmpnam(b) == NULL); }
#endif
/*
** By default, Lua uses gmtime/localtime, except when POSIX is available,
** where it uses gmtime_r/localtime_r
*/
#if defined(LUA_USE_GMTIME_R)
#define l_gmtime(t,r) gmtime_r(t,r)
#define l_localtime(t,r) localtime_r(t,r)
#elif !defined(l_gmtime)
#define l_gmtime(t,r) ((void)r, gmtime(t))
#define l_localtime(t,r) ((void)r, localtime(t))
#endif
static int os_execute (lua_State *L) {
const char *cmd = luaL_optstring(L, 1, NULL);
int stat = -1;
if (cmd != NULL)
return luaL_execresult(L, stat);
else { else {
lua_pushnil(L); lua_pushboolean(L, stat); /* true if there is a shell */
lua_pushfstring(L, "%s: %s", filename, strerror(en)); return 1;
lua_pushinteger(L, en);
return 3;
} }
} }
static int os_remove (lua_State *L) { static int os_remove (lua_State *L) {
const char *filename = luaL_checkstring(L, 1); const char *filename = luaL_checkstring(L, 1);
return os_pushresult(L, rb->remove(filename) == 0, filename); return luaL_fileresult(L, rb->remove(filename) == 0, filename);
} }
static int os_rename (lua_State *L) { static int os_rename (lua_State *L) {
const char *fromname = luaL_checkstring(L, 1); const char *fromname = luaL_checkstring(L, 1);
const char *toname = luaL_checkstring(L, 2); const char *toname = luaL_checkstring(L, 2);
return os_pushresult(L, rb->rename(fromname, toname) == 0, fromname); return luaL_fileresult(L, rb->rename(fromname, toname) == 0, NULL);
}
#if 0
static int os_tmpname (lua_State *L) {
char buff[LUA_TMPNAMBUFSIZE];
int err;
lua_tmpnam(buff, err);
if (err)
return luaL_error(L, "unable to generate a unique filename");
lua_pushstring(L, buff);
return 1;
}
#endif
static int os_getenv (lua_State *L) {
lua_pushnil(L);
return 1;
}
static int os_clock (lua_State *L) {
lua_pushnumber(L, 0);
return 1;
} }
@ -67,7 +145,6 @@ static void setboolfield (lua_State *L, const char *key, int value) {
lua_setfield(L, -2, key); lua_setfield(L, -2, key);
} }
#if CONFIG_RTC
static int getboolfield (lua_State *L, const char *key) { static int getboolfield (lua_State *L, const char *key) {
int res; int res;
lua_getfield(L, -1, key); lua_getfield(L, -1, key);
@ -78,11 +155,10 @@ static int getboolfield (lua_State *L, const char *key) {
static int getfield (lua_State *L, const char *key, int d) { static int getfield (lua_State *L, const char *key, int d) {
int res; int res, isnum;
lua_getfield(L, -1, key); lua_getfield(L, -1, key);
if (lua_isnumber(L, -1)) res = (int)lua_tointegerx(L, -1, &isnum);
res = (int)lua_tointeger(L, -1); if (!isnum) {
else {
if (d < 0) if (d < 0)
return luaL_error(L, "field " LUA_QS " missing in date table", key); return luaL_error(L, "field " LUA_QS " missing in date table", key);
res = d; res = d;
@ -90,22 +166,42 @@ static int getfield (lua_State *L, const char *key, int d) {
lua_pop(L, 1); lua_pop(L, 1);
return res; return res;
} }
#endif
static const char *checkoption (lua_State *L, const char *conv, char *buff) {
static const char *const options[] = LUA_STRFTIMEOPTIONS;
unsigned int i;
for (i = 0; i < sizeof(options)/sizeof(options[0]); i += 2) {
if (*conv != '\0' && strchr(options[i], *conv) != NULL) {
buff[1] = *conv;
if (*options[i + 1] == '\0') { /* one-char conversion specifier? */
buff[2] = '\0'; /* end buffer */
return conv + 1;
}
else if (*(conv + 1) != '\0' &&
strchr(options[i + 1], *(conv + 1)) != NULL) {
buff[2] = *(conv + 1); /* valid two-char conversion specifier */
buff[3] = '\0'; /* end buffer */
return conv + 2;
}
}
}
luaL_argerror(L, 1,
lua_pushfstring(L, "invalid conversion specifier '%%%s'", conv));
return conv; /* to avoid warnings */
}
static int os_date (lua_State *L) { static int os_date (lua_State *L) {
const char *s = luaL_optstring(L, 1, "%c"); const char *s = luaL_optstring(L, 1, "%c");
time_t t = luaL_opt(L, (time_t)luaL_checknumber, 2, time_t t = luaL_opt(L, (time_t)luaL_checknumber, 2, time(NULL));
#if CONFIG_RTC struct tm tmr, *stm;
rb->mktime(rb->get_time()) if (*s == '!') { /* UTC? */
#else stm = l_gmtime(&t, &tmr);
0
#endif
);
struct tm *stm;
if (*s == '!') /* UTC? */ /* Rockbox doesn't support timezones */
s++; /* skip `!' */ s++; /* skip `!' */
stm = gmtime(&t); }
else
stm = l_localtime(&t, &tmr);
if (stm == NULL) /* invalid date? */ if (stm == NULL) /* invalid date? */
lua_pushnil(L); lua_pushnil(L);
else if (strcmp(s, "*t") == 0) { else if (strcmp(s, "*t") == 0) {
@ -121,17 +217,17 @@ static int os_date (lua_State *L) {
setboolfield(L, "isdst", stm->tm_isdst); setboolfield(L, "isdst", stm->tm_isdst);
} }
else { else {
char cc[3]; char cc[4];
luaL_Buffer b; luaL_Buffer b;
cc[0] = '%'; cc[2] = '\0'; cc[0] = '%';
luaL_buffinit(L, &b); luaL_buffinit(L, &b);
for (; *s; s++) { while (*s) {
if (*s != '%' || *(s + 1) == '\0') /* no conversion specifier? */ if (*s != '%') /* no conversion specifier? */
luaL_addchar(&b, *s); luaL_addchar(&b, *s++);
else { else {
size_t reslen; size_t reslen;
char buff[200]; /* should be big enough for any conversion result */ char buff[200]; /* should be big enough for any conversion result */
cc[1] = *(++s); s = checkoption(L, s + 1, cc);
reslen = strftime(buff, sizeof(buff), cc, stm); reslen = strftime(buff, sizeof(buff), cc, stm);
luaL_addlstring(&b, buff, reslen); luaL_addlstring(&b, buff, reslen);
} }
@ -141,11 +237,11 @@ static int os_date (lua_State *L) {
return 1; return 1;
} }
static int os_time (lua_State *L) { static int os_time (lua_State *L) {
time_t t = -1; time_t t;
#if CONFIG_RTC
if (lua_isnoneornil(L, 1)) /* called without args? */ if (lua_isnoneornil(L, 1)) /* called without args? */
t = rb->mktime(rb->get_time()); /* get current time */ t = time(NULL); /* get current time */
else { else {
struct tm ts; struct tm ts;
luaL_checktype(L, 1, LUA_TTABLE); luaL_checktype(L, 1, LUA_TTABLE);
@ -157,9 +253,8 @@ static int os_time (lua_State *L) {
ts.tm_mon = getfield(L, "month", -1) - 1; ts.tm_mon = getfield(L, "month", -1) - 1;
ts.tm_year = getfield(L, "year", -1) - 1900; ts.tm_year = getfield(L, "year", -1) - 1900;
ts.tm_isdst = getboolfield(L, "isdst"); ts.tm_isdst = getboolfield(L, "isdst");
t = rb->mktime(&ts); t = mktime(&ts);
} }
#endif
if (t == (time_t)(-1)) if (t == (time_t)(-1))
lua_pushnil(L); lua_pushnil(L);
else else
@ -168,26 +263,54 @@ static int os_time (lua_State *L) {
} }
static int os_difftime (lua_State *L) {
lua_pushnumber(L, difftime((time_t)(luaL_checknumber(L, 1)),
(time_t)(luaL_optnumber(L, 2, 0))));
return 1;
}
/* }====================================================== */ /* }====================================================== */
#if 0
static int os_setlocale (lua_State *L) {
static const int cat[] = {LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY,
LC_NUMERIC, LC_TIME};
static const char *const catnames[] = {"all", "collate", "ctype", "monetary",
"numeric", "time", NULL};
const char *l = luaL_optstring(L, 1, NULL);
int op = luaL_checkoption(L, 2, "all", catnames);
lua_pushstring(L, setlocale(cat[op], l));
return 1;
}
#endif
static int os_exit (lua_State *L) { static int os_exit (lua_State *L) {
exit(luaL_optint(L, 1, EXIT_SUCCESS)); int status;
return EXIT_SUCCESS; /* never reached, surpress warning */ if (lua_isboolean(L, 1))
status = (lua_toboolean(L, 1) ? EXIT_SUCCESS : EXIT_FAILURE);
else
status = luaL_optint(L, 1, EXIT_SUCCESS);
if (lua_toboolean(L, 2))
lua_close(L);
if (L) exit(status); /* 'if' to avoid warnings for unreachable 'return' */
return 0;
} }
static const luaL_Reg syslib[] = { static const luaL_Reg syslib[] = {
//{"clock", os_clock}, {"clock", os_clock},
{"date", os_date}, {"date", os_date},
//{"difftime", os_difftime}, {"difftime", os_difftime},
//{"execute", os_execute}, {"execute", os_execute},
{"exit", os_exit}, {"exit", os_exit},
//{"getenv", os_getenv}, {"getenv", os_getenv},
{"remove", os_remove}, {"remove", os_remove},
{"rename", os_rename}, {"rename", os_rename},
//{"setlocale", os_setlocale}, /*{"setlocale", os_setlocale},*/
{"time", os_time}, {"time", os_time},
//{"tmpname", os_tmpname}, /*{"tmpname", os_tmpname},*/
{NULL, NULL} {NULL, NULL}
}; };
@ -195,8 +318,8 @@ static const luaL_Reg syslib[] = {
LUALIB_API int luaopen_os (lua_State *L) { LUAMOD_API int luaopen_os (lua_State *L) {
luaL_register(L, LUA_OSLIBNAME, syslib); luaL_newlib(L, syslib);
return 1; return 1;
} }

File diff suppressed because it is too large Load diff

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: lparser.h,v 1.70.1.1 2013/04/12 18:48:47 roberto Exp $
** Lua Parser ** Lua Parser
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -23,34 +23,72 @@ typedef enum {
VFALSE, VFALSE,
VK, /* info = index of constant in `k' */ VK, /* info = index of constant in `k' */
VKNUM, /* nval = numerical value */ VKNUM, /* nval = numerical value */
VNONRELOC, /* info = result register */
VLOCAL, /* info = local register */ VLOCAL, /* info = local register */
VUPVAL, /* info = index of upvalue in `upvalues' */ VUPVAL, /* info = index of upvalue in 'upvalues' */
VGLOBAL, /* info = index of table; aux = index of global name in `k' */ VINDEXED, /* t = table register/upvalue; idx = index R/K */
VINDEXED, /* info = table register; aux = index register (or `k') */
VJMP, /* info = instruction pc */ VJMP, /* info = instruction pc */
VRELOCABLE, /* info = instruction pc */ VRELOCABLE, /* info = instruction pc */
VNONRELOC, /* info = result register */
VCALL, /* info = instruction pc */ VCALL, /* info = instruction pc */
VVARARG /* info = instruction pc */ VVARARG /* info = instruction pc */
} expkind; } expkind;
#define vkisvar(k) (VLOCAL <= (k) && (k) <= VINDEXED)
#define vkisinreg(k) ((k) == VNONRELOC || (k) == VLOCAL)
typedef struct expdesc { typedef struct expdesc {
expkind k; expkind k;
union { union {
struct { int info, aux; } s; struct { /* for indexed variables (VINDEXED) */
lua_Number nval; short idx; /* index (R/K) */
lu_byte t; /* table (register or upvalue) */
lu_byte vt; /* whether 't' is register (VLOCAL) or upvalue (VUPVAL) */
} ind;
int info; /* for generic use */
lua_Number nval; /* for VKNUM */
} u; } u;
int t; /* patch list of `exit when true' */ int t; /* patch list of `exit when true' */
int f; /* patch list of `exit when false' */ int f; /* patch list of `exit when false' */
} expdesc; } expdesc;
typedef struct upvaldesc { /* description of active local variable */
lu_byte k; typedef struct Vardesc {
lu_byte info; short idx; /* variable index in stack */
} upvaldesc; } Vardesc;
/* description of pending goto statements and label statements */
typedef struct Labeldesc {
TString *name; /* label identifier */
int pc; /* position in code */
int line; /* line where it appeared */
lu_byte nactvar; /* local level where it appears in current block */
} Labeldesc;
/* list of labels or gotos */
typedef struct Labellist {
Labeldesc *arr; /* array */
int n; /* number of entries in use */
int size; /* array size */
} Labellist;
/* dynamic structures used by the parser */
typedef struct Dyndata {
struct { /* list of active local variables */
Vardesc *arr;
int n;
int size;
} actvar;
Labellist gt; /* list of pending gotos */
Labellist label; /* list of active labels */
} Dyndata;
/* control of blocks */
struct BlockCnt; /* defined in lparser.c */ struct BlockCnt; /* defined in lparser.c */
@ -60,23 +98,22 @@ typedef struct FuncState {
Table *h; /* table to find (and reuse) elements in `k' */ Table *h; /* table to find (and reuse) elements in `k' */
struct FuncState *prev; /* enclosing function */ struct FuncState *prev; /* enclosing function */
struct LexState *ls; /* lexical state */ struct LexState *ls; /* lexical state */
struct lua_State *L; /* copy of the Lua state */
struct BlockCnt *bl; /* chain of current blocks */ struct BlockCnt *bl; /* chain of current blocks */
int pc; /* next position to code (equivalent to `ncode') */ int pc; /* next position to code (equivalent to `ncode') */
int lasttarget; /* `pc' of last `jump target' */ int lasttarget; /* 'label' of last 'jump label' */
int jpc; /* list of pending jumps to `pc' */ int jpc; /* list of pending jumps to `pc' */
int freereg; /* first free register */
int nk; /* number of elements in `k' */ int nk; /* number of elements in `k' */
int np; /* number of elements in `p' */ int np; /* number of elements in `p' */
short nlocvars; /* number of elements in `locvars' */ int firstlocal; /* index of first local var (in Dyndata array) */
short nlocvars; /* number of elements in 'f->locvars' */
lu_byte nactvar; /* number of active local variables */ lu_byte nactvar; /* number of active local variables */
upvaldesc upvalues[LUAI_MAXUPVALUES]; /* upvalues */ lu_byte nups; /* number of upvalues */
unsigned short actvar[LUAI_MAXVARS]; /* declared-variable stack */ lu_byte freereg; /* first free register */
} FuncState; } FuncState;
LUAI_FUNC Proto *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff, LUAI_FUNC Closure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
const char *name); Dyndata *dyd, const char *name, int firstchar);
#endif #endif

View file

@ -1,17 +1,19 @@
/* /*
** $Id: lstate.c,v 2.36.1.2 2008/01/03 15:20:39 roberto Exp $ ** $Id: lstate.c,v 2.99.1.2 2013/11/08 17:45:31 roberto Exp $
** Global State ** Global State
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
#include <stddef.h> #include <stddef.h>
#include <string.h>
#define lstate_c #define lstate_c
#define LUA_CORE #define LUA_CORE
#include "lua.h" #include "lua.h"
#include "lapi.h"
#include "ldebug.h" #include "ldebug.h"
#include "ldo.h" #include "ldo.h"
#include "lfunc.h" #include "lfunc.h"
@ -24,119 +26,240 @@
#include "ltm.h" #include "ltm.h"
#define state_size(x) (sizeof(x) + LUAI_EXTRASPACE) #if !defined(LUAI_GCPAUSE)
#define fromstate(l) (cast(lu_byte *, (l)) - LUAI_EXTRASPACE) #define LUAI_GCPAUSE 200 /* 200% */
#define tostate(l) (cast(lua_State *, cast(lu_byte *, l) + LUAI_EXTRASPACE)) #endif
#if !defined(LUAI_GCMAJOR)
#define LUAI_GCMAJOR 200 /* 200% */
#endif
#if !defined(LUAI_GCMUL)
#define LUAI_GCMUL 200 /* GC runs 'twice the speed' of memory allocation */
#endif
#define MEMERRMSG "not enough memory"
/*
** a macro to help the creation of a unique random seed when a state is
** created; the seed is used to randomize hashes.
*/
#if !defined(luai_makeseed)
#include <time.h>
#define luai_makeseed() cast(unsigned int, time(NULL))
#endif
/*
** thread state + extra space
*/
typedef struct LX {
#if defined(LUAI_EXTRASPACE)
char buff[LUAI_EXTRASPACE];
#endif
lua_State l;
} LX;
/* /*
** Main thread combines a thread state and the global state ** Main thread combines a thread state and the global state
*/ */
typedef struct LG { typedef struct LG {
lua_State l; LX l;
global_State g; global_State g;
} LG; } LG;
static void stack_init (lua_State *L1, lua_State *L) {
/* initialize CallInfo array */ #define fromstate(L) (cast(LX *, cast(lu_byte *, (L)) - offsetof(LX, l)))
L1->base_ci = luaM_newvector(L, BASIC_CI_SIZE, CallInfo);
L1->ci = L1->base_ci;
L1->size_ci = BASIC_CI_SIZE;
L1->end_ci = L1->base_ci + L1->size_ci - 1;
/* initialize stack array */
L1->stack = luaM_newvector(L, BASIC_STACK_SIZE + EXTRA_STACK, TValue);
L1->stacksize = BASIC_STACK_SIZE + EXTRA_STACK;
L1->top = L1->stack;
L1->stack_last = L1->stack+(L1->stacksize - EXTRA_STACK)-1;
/* initialize first ci */
L1->ci->func = L1->top;
setnilvalue(L1->top++); /* `function' entry for this `ci' */
L1->base = L1->ci->base = L1->top;
L1->ci->top = L1->top + LUA_MINSTACK;
}
static void freestack (lua_State *L, lua_State *L1) { /*
luaM_freearray(L, L1->base_ci, L1->size_ci, CallInfo); ** Compute an initial seed as random as possible. In ANSI, rely on
luaM_freearray(L, L1->stack, L1->stacksize, TValue); ** Address Space Layout Randomization (if present) to increase
** randomness..
*/
#define addbuff(b,p,e) \
{ size_t t = cast(size_t, e); \
memcpy(buff + p, &t, sizeof(t)); p += sizeof(t); }
static unsigned int makeseed (lua_State *L) {
char buff[4 * sizeof(size_t)];
unsigned int h = luai_makeseed();
int p = 0;
addbuff(buff, p, L); /* heap variable */
addbuff(buff, p, &h); /* local variable */
addbuff(buff, p, luaO_nilobject); /* global variable */
addbuff(buff, p, &lua_newstate); /* public function */
lua_assert(p == sizeof(buff));
return luaS_hash(buff, p, h);
} }
/* /*
** open parts that may cause memory-allocation errors ** set GCdebt to a new value keeping the value (totalbytes + GCdebt)
** invariant
*/
void luaE_setdebt (global_State *g, l_mem debt) {
g->totalbytes -= (debt - g->GCdebt);
g->GCdebt = debt;
}
CallInfo *luaE_extendCI (lua_State *L) {
CallInfo *ci = luaM_new(L, CallInfo);
lua_assert(L->ci->next == NULL);
L->ci->next = ci;
ci->previous = L->ci;
ci->next = NULL;
return ci;
}
void luaE_freeCI (lua_State *L) {
CallInfo *ci = L->ci;
CallInfo *next = ci->next;
ci->next = NULL;
while ((ci = next) != NULL) {
next = ci->next;
luaM_free(L, ci);
}
}
static void stack_init (lua_State *L1, lua_State *L) {
int i; CallInfo *ci;
/* initialize stack array */
L1->stack = luaM_newvector(L, BASIC_STACK_SIZE, TValue);
L1->stacksize = BASIC_STACK_SIZE;
for (i = 0; i < BASIC_STACK_SIZE; i++)
setnilvalue(L1->stack + i); /* erase new stack */
L1->top = L1->stack;
L1->stack_last = L1->stack + L1->stacksize - EXTRA_STACK;
/* initialize first ci */
ci = &L1->base_ci;
ci->next = ci->previous = NULL;
ci->callstatus = 0;
ci->func = L1->top;
setnilvalue(L1->top++); /* 'function' entry for this 'ci' */
ci->top = L1->top + LUA_MINSTACK;
L1->ci = ci;
}
static void freestack (lua_State *L) {
if (L->stack == NULL)
return; /* stack not completely built yet */
L->ci = &L->base_ci; /* free the entire 'ci' list */
luaE_freeCI(L);
luaM_freearray(L, L->stack, L->stacksize); /* free stack array */
}
/*
** Create registry table and its predefined values
*/
static void init_registry (lua_State *L, global_State *g) {
TValue mt;
/* create registry */
Table *registry = luaH_new(L);
sethvalue(L, &g->l_registry, registry);
luaH_resize(L, registry, LUA_RIDX_LAST, 0);
/* registry[LUA_RIDX_MAINTHREAD] = L */
setthvalue(L, &mt, L);
luaH_setint(L, registry, LUA_RIDX_MAINTHREAD, &mt);
/* registry[LUA_RIDX_GLOBALS] = table of globals */
sethvalue(L, &mt, luaH_new(L));
luaH_setint(L, registry, LUA_RIDX_GLOBALS, &mt);
}
/*
** open parts of the state that may cause memory-allocation errors
*/ */
static void f_luaopen (lua_State *L, void *ud) { static void f_luaopen (lua_State *L, void *ud) {
global_State *g = G(L); global_State *g = G(L);
UNUSED(ud); UNUSED(ud);
stack_init(L, L); /* init stack */ stack_init(L, L); /* init stack */
sethvalue(L, gt(L), luaH_new(L, 0, 2)); /* table of globals */ init_registry(L, g);
sethvalue(L, registry(L), luaH_new(L, 0, 2)); /* registry */
luaS_resize(L, MINSTRTABSIZE); /* initial size of string table */ luaS_resize(L, MINSTRTABSIZE); /* initial size of string table */
luaT_init(L); luaT_init(L);
luaX_init(L); luaX_init(L);
luaS_fix(luaS_newliteral(L, MEMERRMSG)); /* pre-create memory-error message */
g->GCthreshold = 4*g->totalbytes; g->memerrmsg = luaS_newliteral(L, MEMERRMSG);
luaS_fix(g->memerrmsg); /* it should never be collected */
g->gcrunning = 1; /* allow gc */
g->version = lua_version(NULL);
luai_userstateopen(L);
} }
/*
** preinitialize a state with consistent values without allocating
** any memory (to avoid errors)
*/
static void preinit_state (lua_State *L, global_State *g) { static void preinit_state (lua_State *L, global_State *g) {
G(L) = g; G(L) = g;
L->stack = NULL; L->stack = NULL;
L->ci = NULL;
L->stacksize = 0; L->stacksize = 0;
L->errorJmp = NULL; L->errorJmp = NULL;
L->nCcalls = 0;
L->hook = NULL; L->hook = NULL;
L->hookmask = 0; L->hookmask = 0;
L->basehookcount = 0; L->basehookcount = 0;
L->allowhook = 1; L->allowhook = 1;
resethookcount(L); resethookcount(L);
L->openupval = NULL; L->openupval = NULL;
L->size_ci = 0; L->nny = 1;
L->nCcalls = L->baseCcalls = 0; L->status = LUA_OK;
L->status = 0;
L->base_ci = L->ci = NULL;
L->savedpc = NULL;
L->errfunc = 0; L->errfunc = 0;
setnilvalue(gt(L));
} }
static void close_state (lua_State *L) { static void close_state (lua_State *L) {
global_State *g = G(L); global_State *g = G(L);
luaF_close(L, L->stack); /* close all upvalues for this thread */ luaF_close(L, L->stack); /* close all upvalues for this thread */
luaC_freeall(L); /* collect all objects */ luaC_freeallobjects(L); /* collect all objects */
lua_assert(g->rootgc == obj2gco(L)); if (g->version) /* closing a fully built state? */
lua_assert(g->strt.nuse == 0); luai_userstateclose(L);
luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size, TString *); luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size);
luaZ_freebuffer(L, &g->buff); luaZ_freebuffer(L, &g->buff);
freestack(L, L); freestack(L);
lua_assert(g->totalbytes == sizeof(LG)); lua_assert(gettotalbytes(g) == sizeof(LG));
(*g->frealloc)(g->ud, fromstate(L), state_size(LG), 0); (*g->frealloc)(g->ud, fromstate(L), sizeof(LG), 0); /* free main block */
} }
lua_State *luaE_newthread (lua_State *L) { LUA_API lua_State *lua_newthread (lua_State *L) {
lua_State *L1 = tostate(luaM_malloc(L, state_size(lua_State))); lua_State *L1;
luaC_link(L, obj2gco(L1), LUA_TTHREAD); lua_lock(L);
luaC_checkGC(L);
L1 = &luaC_newobj(L, LUA_TTHREAD, sizeof(LX), NULL, offsetof(LX, l))->th;
setthvalue(L, L->top, L1);
api_incr_top(L);
preinit_state(L1, G(L)); preinit_state(L1, G(L));
stack_init(L1, L); /* init stack */
setobj2n(L, gt(L1), gt(L)); /* share table of globals */
L1->hookmask = L->hookmask; L1->hookmask = L->hookmask;
L1->basehookcount = L->basehookcount; L1->basehookcount = L->basehookcount;
L1->hook = L->hook; L1->hook = L->hook;
resethookcount(L1); resethookcount(L1);
lua_assert(iswhite(obj2gco(L1))); luai_userstatethread(L, L1);
stack_init(L1, L); /* init stack */
lua_unlock(L);
return L1; return L1;
} }
void luaE_freethread (lua_State *L, lua_State *L1) { void luaE_freethread (lua_State *L, lua_State *L1) {
LX *l = fromstate(L1);
luaF_close(L1, L1->stack); /* close all upvalues for this thread */ luaF_close(L1, L1->stack); /* close all upvalues for this thread */
lua_assert(L1->openupval == NULL); lua_assert(L1->openupval == NULL);
luai_userstatefree(L1); luai_userstatefree(L, L1);
freestack(L, L1); freestack(L1);
luaM_freemem(L, fromstate(L1), state_size(lua_State)); luaM_free(L, l);
} }
@ -144,71 +267,57 @@ LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud) {
int i; int i;
lua_State *L; lua_State *L;
global_State *g; global_State *g;
void *l = (*f)(ud, NULL, 0, state_size(LG)); LG *l = cast(LG *, (*f)(ud, NULL, LUA_TTHREAD, sizeof(LG)));
if (l == NULL) return NULL; if (l == NULL) return NULL;
L = tostate(l); L = &l->l.l;
g = &((LG *)L)->g; g = &l->g;
L->next = NULL; L->next = NULL;
L->tt = LUA_TTHREAD; L->tt = LUA_TTHREAD;
g->currentwhite = bit2mask(WHITE0BIT, FIXEDBIT); g->currentwhite = bit2mask(WHITE0BIT, FIXEDBIT);
L->marked = luaC_white(g); L->marked = luaC_white(g);
set2bits(L->marked, FIXEDBIT, SFIXEDBIT); g->gckind = KGC_NORMAL;
preinit_state(L, g); preinit_state(L, g);
g->frealloc = f; g->frealloc = f;
g->ud = ud; g->ud = ud;
g->mainthread = L; g->mainthread = L;
g->seed = makeseed(L);
g->uvhead.u.l.prev = &g->uvhead; g->uvhead.u.l.prev = &g->uvhead;
g->uvhead.u.l.next = &g->uvhead; g->uvhead.u.l.next = &g->uvhead;
g->GCthreshold = 0; /* mark it as unfinished state */ g->gcrunning = 0; /* no GC while building state */
g->GCestimate = 0;
g->strt.size = 0; g->strt.size = 0;
g->strt.nuse = 0; g->strt.nuse = 0;
g->strt.hash = NULL; g->strt.hash = NULL;
setnilvalue(registry(L)); setnilvalue(&g->l_registry);
luaZ_initbuffer(L, &g->buff); luaZ_initbuffer(L, &g->buff);
g->panic = NULL; g->panic = NULL;
g->version = NULL;
g->gcstate = GCSpause; g->gcstate = GCSpause;
g->rootgc = obj2gco(L); g->allgc = NULL;
g->sweepstrgc = 0; g->finobj = NULL;
g->sweepgc = &g->rootgc; g->tobefnz = NULL;
g->gray = NULL; g->sweepgc = g->sweepfin = NULL;
g->grayagain = NULL; g->gray = g->grayagain = NULL;
g->weak = NULL; g->weak = g->ephemeron = g->allweak = NULL;
g->tmudata = NULL;
g->totalbytes = sizeof(LG); g->totalbytes = sizeof(LG);
g->GCdebt = 0;
g->gcpause = LUAI_GCPAUSE; g->gcpause = LUAI_GCPAUSE;
g->gcmajorinc = LUAI_GCMAJOR;
g->gcstepmul = LUAI_GCMUL; g->gcstepmul = LUAI_GCMUL;
g->gcdept = 0; for (i=0; i < LUA_NUMTAGS; i++) g->mt[i] = NULL;
for (i=0; i<NUM_TAGS; i++) g->mt[i] = NULL; if (luaD_rawrunprotected(L, f_luaopen, NULL) != LUA_OK) {
if (luaD_rawrunprotected(L, f_luaopen, NULL) != 0) {
/* memory allocation error: free partial state */ /* memory allocation error: free partial state */
close_state(L); close_state(L);
L = NULL; L = NULL;
} }
else
luai_userstateopen(L);
return L; return L;
} }
static void callallgcTM (lua_State *L, void *ud) {
UNUSED(ud);
luaC_callGCTM(L); /* call GC metamethods for all udata */
}
LUA_API void lua_close (lua_State *L) { LUA_API void lua_close (lua_State *L) {
L = G(L)->mainthread; /* only the main thread can be closed */ L = G(L)->mainthread; /* only the main thread can be closed */
lua_lock(L); lua_lock(L);
luaF_close(L, L->stack); /* close all upvalues for this thread */
luaC_separateudata(L, 1); /* separate udata that have GC metamethods */
L->errfunc = 0; /* no error function during GC metamethods */
do { /* repeat until no more errors */
L->ci = L->base_ci;
L->base = L->top = L->ci->base;
L->nCcalls = L->baseCcalls = 0;
} while (luaD_rawrunprotected(L, callallgcTM, NULL) != 0);
lua_assert(G(L)->tmudata == NULL);
luai_userstateclose(L);
close_state(L); close_state(L);
} }

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: lstate.h,v 2.82.1.1 2013/04/12 18:48:47 roberto Exp $
** Global State ** Global State
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -14,26 +14,47 @@
#include "lzio.h" #include "lzio.h"
/*
** Some notes about garbage-collected objects: All objects in Lua must
** be kept somehow accessible until being freed.
**
** Lua keeps most objects linked in list g->allgc. The link uses field
** 'next' of the CommonHeader.
**
** Strings are kept in several lists headed by the array g->strt.hash.
**
** Open upvalues are not subject to independent garbage collection. They
** are collected together with their respective threads. Lua keeps a
** double-linked list with all open upvalues (g->uvhead) so that it can
** mark objects referred by them. (They are always gray, so they must
** be remarked in the atomic step. Usually their contents would be marked
** when traversing the respective threads, but the thread may already be
** dead, while the upvalue is still accessible through closures.)
**
** Objects with finalizers are kept in the list g->finobj.
**
** The list g->tobefnz links all objects being finalized.
*/
struct lua_longjmp; /* defined in ldo.c */ struct lua_longjmp; /* defined in ldo.c */
/* table of globals */
#define gt(L) (&L->l_gt)
/* registry */
#define registry(L) (&G(L)->l_registry)
/* extra stack space to handle TM calls and some other extras */ /* extra stack space to handle TM calls and some other extras */
#define EXTRA_STACK 5 #define EXTRA_STACK 5
#define BASIC_CI_SIZE 8
#define BASIC_STACK_SIZE (2*LUA_MINSTACK) #define BASIC_STACK_SIZE (2*LUA_MINSTACK)
/* kinds of Garbage Collection */
#define KGC_NORMAL 0
#define KGC_EMERGENCY 1 /* gc was forced by an allocation failure */
#define KGC_GEN 2 /* generational collection */
typedef struct stringtable { typedef struct stringtable {
GCObject **hash; GCObject **hash;
@ -43,54 +64,87 @@ typedef struct stringtable {
/* /*
** informations about a call ** information about a call
*/ */
typedef struct CallInfo { typedef struct CallInfo {
StkId base; /* base for this function */
StkId func; /* function index in the stack */ StkId func; /* function index in the stack */
StkId top; /* top for this function */ StkId top; /* top for this function */
const Instruction *savedpc; struct CallInfo *previous, *next; /* dynamic call link */
int nresults; /* expected number of results from this function */ short nresults; /* expected number of results from this function */
int tailcalls; /* number of tail calls lost under this entry */ lu_byte callstatus;
ptrdiff_t extra;
union {
struct { /* only for Lua functions */
StkId base; /* base for this function */
const Instruction *savedpc;
} l;
struct { /* only for C functions */
int ctx; /* context info. in case of yields */
lua_CFunction k; /* continuation in case of yields */
ptrdiff_t old_errfunc;
lu_byte old_allowhook;
lu_byte status;
} c;
} u;
} CallInfo; } CallInfo;
/*
** Bits in CallInfo status
*/
#define CIST_LUA (1<<0) /* call is running a Lua function */
#define CIST_HOOKED (1<<1) /* call is running a debug hook */
#define CIST_REENTRY (1<<2) /* call is running on same invocation of
luaV_execute of previous call */
#define CIST_YIELDED (1<<3) /* call reentered after suspension */
#define CIST_YPCALL (1<<4) /* call is a yieldable protected call */
#define CIST_STAT (1<<5) /* call has an error status (pcall) */
#define CIST_TAIL (1<<6) /* call was tail called */
#define CIST_HOOKYIELD (1<<7) /* last hook called yielded */
#define curr_func(L) (clvalue(L->ci->func))
#define ci_func(ci) (clvalue((ci)->func)) #define isLua(ci) ((ci)->callstatus & CIST_LUA)
#define f_isLua(ci) (!ci_func(ci)->c.isC)
#define isLua(ci) (ttisfunction((ci)->func) && f_isLua(ci))
/* /*
** `global state', shared by all threads of this state ** `global state', shared by all threads of this state
*/ */
typedef struct global_State { typedef struct global_State {
stringtable strt; /* hash table for strings */
lua_Alloc frealloc; /* function to reallocate memory */ lua_Alloc frealloc; /* function to reallocate memory */
void *ud; /* auxiliary data to `frealloc' */ void *ud; /* auxiliary data to `frealloc' */
lu_mem totalbytes; /* number of bytes currently allocated - GCdebt */
l_mem GCdebt; /* bytes allocated not yet compensated by the collector */
lu_mem GCmemtrav; /* memory traversed by the GC */
lu_mem GCestimate; /* an estimate of the non-garbage memory in use */
stringtable strt; /* hash table for strings */
TValue l_registry;
unsigned int seed; /* randomized seed for hashes */
lu_byte currentwhite; lu_byte currentwhite;
lu_byte gcstate; /* state of garbage collector */ lu_byte gcstate; /* state of garbage collector */
lu_byte gckind; /* kind of GC running */
lu_byte gcrunning; /* true if GC is running */
int sweepstrgc; /* position of sweep in `strt' */ int sweepstrgc; /* position of sweep in `strt' */
GCObject *rootgc; /* list of all collectable objects */ GCObject *allgc; /* list of all collectable objects */
GCObject **sweepgc; /* position of sweep in `rootgc' */ GCObject *finobj; /* list of collectable objects with finalizers */
GCObject **sweepgc; /* current position of sweep in list 'allgc' */
GCObject **sweepfin; /* current position of sweep in list 'finobj' */
GCObject *gray; /* list of gray objects */ GCObject *gray; /* list of gray objects */
GCObject *grayagain; /* list of objects to be traversed atomically */ GCObject *grayagain; /* list of objects to be traversed atomically */
GCObject *weak; /* list of weak tables (to be cleared) */ GCObject *weak; /* list of tables with weak values */
GCObject *tmudata; /* last element of list of userdata to be GC */ GCObject *ephemeron; /* list of ephemeron tables (weak keys) */
Mbuffer buff; /* temporary buffer for string concatentation */ GCObject *allweak; /* list of all-weak tables */
lu_mem GCthreshold; GCObject *tobefnz; /* list of userdata to be GC */
lu_mem totalbytes; /* number of bytes currently allocated */ UpVal uvhead; /* head of double-linked list of all open upvalues */
lu_mem estimate; /* an estimate of number of bytes actually in use */ Mbuffer buff; /* temporary buffer for string concatenation */
lu_mem gcdept; /* how much GC is `behind schedule' */
int gcpause; /* size of pause between successive GCs */ int gcpause; /* size of pause between successive GCs */
int gcmajorinc; /* pause between major collections (only in gen. mode) */
int gcstepmul; /* GC `granularity' */ int gcstepmul; /* GC `granularity' */
lua_CFunction panic; /* to be called in unprotected errors */ lua_CFunction panic; /* to be called in unprotected errors */
TValue l_registry;
struct lua_State *mainthread; struct lua_State *mainthread;
UpVal uvhead; /* head of double-linked list of all open upvalues */ const lua_Number *version; /* pointer to version number */
struct Table *mt[NUM_TAGS]; /* metatables for basic types */ TString *memerrmsg; /* memory-error message */
TString *tmname[TM_N]; /* array with tag-method names */ TString *tmname[TM_N]; /* array with tag-method names */
struct Table *mt[LUA_NUMTAGS]; /* metatables for basic types */
} global_State; } global_State;
@ -101,29 +155,24 @@ struct lua_State {
CommonHeader; CommonHeader;
lu_byte status; lu_byte status;
StkId top; /* first free slot in the stack */ StkId top; /* first free slot in the stack */
StkId base; /* base of current function */
global_State *l_G; global_State *l_G;
CallInfo *ci; /* call info for current function */ CallInfo *ci; /* call info for current function */
const Instruction *savedpc; /* `savedpc' of current function */ const Instruction *oldpc; /* last pc traced */
StkId stack_last; /* last free slot in the stack */ StkId stack_last; /* last free slot in the stack */
StkId stack; /* stack base */ StkId stack; /* stack base */
CallInfo *end_ci; /* points after end of ci array*/
CallInfo *base_ci; /* array of CallInfo's */
int stacksize; int stacksize;
int size_ci; /* size of array `base_ci' */ unsigned short nny; /* number of non-yieldable calls in stack */
unsigned short nCcalls; /* number of nested C calls */ unsigned short nCcalls; /* number of nested C calls */
unsigned short baseCcalls; /* nested C calls when resuming coroutine */
lu_byte hookmask; lu_byte hookmask;
lu_byte allowhook; lu_byte allowhook;
int basehookcount; int basehookcount;
int hookcount; int hookcount;
lua_Hook hook; lua_Hook hook;
TValue l_gt; /* table of globals */
TValue env; /* temporary place for environments */
GCObject *openupval; /* list of open upvalues in this stack */ GCObject *openupval; /* list of open upvalues in this stack */
GCObject *gclist; GCObject *gclist;
struct lua_longjmp *errorJmp; /* current error recover point */ struct lua_longjmp *errorJmp; /* current error recover point */
ptrdiff_t errfunc; /* current error handling function (stack index) */ ptrdiff_t errfunc; /* current error handling function (stack index) */
CallInfo base_ci; /* CallInfo for first level (C calling Lua) */
}; };
@ -134,7 +183,7 @@ struct lua_State {
** Union of all collectable objects ** Union of all collectable objects
*/ */
union GCObject { union GCObject {
GCheader gch; GCheader gch; /* common header */
union TString ts; union TString ts;
union Udata u; union Udata u;
union Closure cl; union Closure cl;
@ -145,25 +194,35 @@ union GCObject {
}; };
#define gch(o) (&(o)->gch)
/* macros to convert a GCObject into a specific value */ /* macros to convert a GCObject into a specific value */
#define rawgco2ts(o) check_exp((o)->gch.tt == LUA_TSTRING, &((o)->ts)) #define rawgco2ts(o) \
check_exp(novariant((o)->gch.tt) == LUA_TSTRING, &((o)->ts))
#define gco2ts(o) (&rawgco2ts(o)->tsv) #define gco2ts(o) (&rawgco2ts(o)->tsv)
#define rawgco2u(o) check_exp((o)->gch.tt == LUA_TUSERDATA, &((o)->u)) #define rawgco2u(o) check_exp((o)->gch.tt == LUA_TUSERDATA, &((o)->u))
#define gco2u(o) (&rawgco2u(o)->uv) #define gco2u(o) (&rawgco2u(o)->uv)
#define gco2cl(o) check_exp((o)->gch.tt == LUA_TFUNCTION, &((o)->cl)) #define gco2lcl(o) check_exp((o)->gch.tt == LUA_TLCL, &((o)->cl.l))
#define gco2h(o) check_exp((o)->gch.tt == LUA_TTABLE, &((o)->h)) #define gco2ccl(o) check_exp((o)->gch.tt == LUA_TCCL, &((o)->cl.c))
#define gco2cl(o) \
check_exp(novariant((o)->gch.tt) == LUA_TFUNCTION, &((o)->cl))
#define gco2t(o) check_exp((o)->gch.tt == LUA_TTABLE, &((o)->h))
#define gco2p(o) check_exp((o)->gch.tt == LUA_TPROTO, &((o)->p)) #define gco2p(o) check_exp((o)->gch.tt == LUA_TPROTO, &((o)->p))
#define gco2uv(o) check_exp((o)->gch.tt == LUA_TUPVAL, &((o)->uv)) #define gco2uv(o) check_exp((o)->gch.tt == LUA_TUPVAL, &((o)->uv))
#define ngcotouv(o) \
check_exp((o) == NULL || (o)->gch.tt == LUA_TUPVAL, &((o)->uv))
#define gco2th(o) check_exp((o)->gch.tt == LUA_TTHREAD, &((o)->th)) #define gco2th(o) check_exp((o)->gch.tt == LUA_TTHREAD, &((o)->th))
/* macro to convert any Lua object into a GCObject */ /* macro to convert any Lua object into a GCObject */
#define obj2gco(v) (cast(GCObject *, (v))) #define obj2gco(v) (cast(GCObject *, (v)))
LUAI_FUNC lua_State *luaE_newthread (lua_State *L); /* actual number of total bytes allocated */
#define gettotalbytes(g) ((g)->totalbytes + (g)->GCdebt)
LUAI_FUNC void luaE_setdebt (global_State *g, l_mem debt);
LUAI_FUNC void luaE_freethread (lua_State *L, lua_State *L1); LUAI_FUNC void luaE_freethread (lua_State *L, lua_State *L1);
LUAI_FUNC CallInfo *luaE_extendCI (lua_State *L);
LUAI_FUNC void luaE_freeCI (lua_State *L);
#endif #endif

View file

@ -1,5 +1,5 @@
/* /*
** $Id: lstring.c,v 2.8.1.1 2007/12/27 13:02:25 roberto Exp $ ** $Id: lstring.c,v 2.26.1.1 2013/04/12 18:48:47 roberto Exp $
** String table (keeps all strings handled by Lua) ** String table (keeps all strings handled by Lua)
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -18,78 +18,157 @@
#include "lstring.h" #include "lstring.h"
/*
** Lua will use at most ~(2^LUAI_HASHLIMIT) bytes from a string to
** compute its hash
*/
#if !defined(LUAI_HASHLIMIT)
#define LUAI_HASHLIMIT 5
#endif
void luaS_resize (lua_State *L, int newsize) {
GCObject **newhash; /*
stringtable *tb; ** equality for long strings
int i; */
if (G(L)->gcstate == GCSsweepstring) int luaS_eqlngstr (TString *a, TString *b) {
return; /* cannot resize during GC traverse */ size_t len = a->tsv.len;
newhash = luaM_newvector(L, newsize, GCObject *); lua_assert(a->tsv.tt == LUA_TLNGSTR && b->tsv.tt == LUA_TLNGSTR);
tb = &G(L)->strt; return (a == b) || /* same instance or... */
for (i=0; i<newsize; i++) newhash[i] = NULL; ((len == b->tsv.len) && /* equal length and ... */
/* rehash */ (memcmp(getstr(a), getstr(b), len) == 0)); /* equal contents */
for (i=0; i<tb->size; i++) {
GCObject *p = tb->hash[i];
while (p) { /* for each node in the list */
GCObject *next = p->gch.next; /* save next */
unsigned int h = gco2ts(p)->hash;
int h1 = lmod(h, newsize); /* new position */
lua_assert(cast_int(h%newsize) == lmod(h, newsize));
p->gch.next = newhash[h1]; /* chain it */
newhash[h1] = p;
p = next;
}
}
luaM_freearray(L, tb->hash, tb->size, TString *);
tb->size = newsize;
tb->hash = newhash;
} }
static TString *newlstr (lua_State *L, const char *str, size_t l, /*
unsigned int h) { ** equality for strings
*/
int luaS_eqstr (TString *a, TString *b) {
return (a->tsv.tt == b->tsv.tt) &&
(a->tsv.tt == LUA_TSHRSTR ? eqshrstr(a, b) : luaS_eqlngstr(a, b));
}
unsigned int luaS_hash (const char *str, size_t l, unsigned int seed) {
unsigned int h = seed ^ cast(unsigned int, l);
size_t l1;
size_t step = (l >> LUAI_HASHLIMIT) + 1;
for (l1 = l; l1 >= step; l1 -= step)
h = h ^ ((h<<5) + (h>>2) + cast_byte(str[l1 - 1]));
return h;
}
/*
** resizes the string table
*/
void luaS_resize (lua_State *L, int newsize) {
int i;
stringtable *tb = &G(L)->strt;
/* cannot resize while GC is traversing strings */
luaC_runtilstate(L, ~bitmask(GCSsweepstring));
if (newsize > tb->size) {
luaM_reallocvector(L, tb->hash, tb->size, newsize, GCObject *);
for (i = tb->size; i < newsize; i++) tb->hash[i] = NULL;
}
/* rehash */
for (i=0; i<tb->size; i++) {
GCObject *p = tb->hash[i];
tb->hash[i] = NULL;
while (p) { /* for each node in the list */
GCObject *next = gch(p)->next; /* save next */
unsigned int h = lmod(gco2ts(p)->hash, newsize); /* new position */
gch(p)->next = tb->hash[h]; /* chain it */
tb->hash[h] = p;
resetoldbit(p); /* see MOVE OLD rule */
p = next;
}
}
if (newsize < tb->size) {
/* shrinking slice must be empty */
lua_assert(tb->hash[newsize] == NULL && tb->hash[tb->size - 1] == NULL);
luaM_reallocvector(L, tb->hash, tb->size, newsize, GCObject *);
}
tb->size = newsize;
}
/*
** creates a new string object
*/
static TString *createstrobj (lua_State *L, const char *str, size_t l,
int tag, unsigned int h, GCObject **list) {
TString *ts; TString *ts;
stringtable *tb; size_t totalsize; /* total size of TString object */
if (l+1 > (MAX_SIZET - sizeof(TString))/sizeof(char)) totalsize = sizeof(TString) + ((l + 1) * sizeof(char));
luaM_toobig(L); ts = &luaC_newobj(L, tag, totalsize, list, 0)->ts;
ts = cast(TString *, luaM_malloc(L, (l+1)*sizeof(char)+sizeof(TString)));
ts->tsv.len = l; ts->tsv.len = l;
ts->tsv.hash = h; ts->tsv.hash = h;
ts->tsv.marked = luaC_white(G(L)); ts->tsv.extra = 0;
ts->tsv.tt = LUA_TSTRING;
ts->tsv.reserved = 0;
memcpy(ts+1, str, l*sizeof(char)); memcpy(ts+1, str, l*sizeof(char));
((char *)(ts+1))[l] = '\0'; /* ending 0 */ ((char *)(ts+1))[l] = '\0'; /* ending 0 */
tb = &G(L)->strt;
h = lmod(h, tb->size);
ts->tsv.next = tb->hash[h]; /* chain new entry */
tb->hash[h] = obj2gco(ts);
tb->nuse++;
if (tb->nuse > cast(lu_int32, tb->size) && tb->size <= MAX_INT/2)
luaS_resize(L, tb->size*2); /* too crowded */
return ts; return ts;
} }
TString *luaS_newlstr (lua_State *L, const char *str, size_t l) { /*
** creates a new short string, inserting it into string table
*/
static TString *newshrstr (lua_State *L, const char *str, size_t l,
unsigned int h) {
GCObject **list; /* (pointer to) list where it will be inserted */
stringtable *tb = &G(L)->strt;
TString *s;
if (tb->nuse >= cast(lu_int32, tb->size) && tb->size <= MAX_INT/2)
luaS_resize(L, tb->size*2); /* too crowded */
list = &tb->hash[lmod(h, tb->size)];
s = createstrobj(L, str, l, LUA_TSHRSTR, h, list);
tb->nuse++;
return s;
}
/*
** checks whether short string exists and reuses it or creates a new one
*/
static TString *internshrstr (lua_State *L, const char *str, size_t l) {
GCObject *o; GCObject *o;
unsigned int h = cast(unsigned int, l); /* seed */ global_State *g = G(L);
size_t step = (l>>5)+1; /* if string is too long, don't hash all its chars */ unsigned int h = luaS_hash(str, l, g->seed);
size_t l1; for (o = g->strt.hash[lmod(h, g->strt.size)];
for (l1=l; l1>=step; l1-=step) /* compute hash */
h = h ^ ((h<<5)+(h>>2)+cast(unsigned char, str[l1-1]));
for (o = G(L)->strt.hash[lmod(h, G(L)->strt.size)];
o != NULL; o != NULL;
o = o->gch.next) { o = gch(o)->next) {
TString *ts = rawgco2ts(o); TString *ts = rawgco2ts(o);
if (ts->tsv.len == l && (memcmp(str, getstr(ts), l) == 0)) { if (h == ts->tsv.hash &&
/* string may be dead */ l == ts->tsv.len &&
if (isdead(G(L), o)) changewhite(o); (memcmp(str, getstr(ts), l * sizeof(char)) == 0)) {
if (isdead(G(L), o)) /* string is dead (but was not collected yet)? */
changewhite(o); /* resurrect it */
return ts; return ts;
} }
} }
return newlstr(L, str, l, h); /* not found */ return newshrstr(L, str, l, h); /* not found; create a new string */
}
/*
** new string (with explicit length)
*/
TString *luaS_newlstr (lua_State *L, const char *str, size_t l) {
if (l <= LUAI_MAXSHORTLEN) /* short string? */
return internshrstr(L, str, l);
else {
if (l + 1 > (MAX_SIZET - sizeof(TString))/sizeof(char))
luaM_toobig(L);
return createstrobj(L, str, l, LUA_TLNGSTR, G(L)->seed, NULL);
}
}
/*
** new zero-terminated string
*/
TString *luaS_new (lua_State *L, const char *str) {
return luaS_newlstr(L, str, strlen(str));
} }
@ -97,15 +176,10 @@ Udata *luaS_newudata (lua_State *L, size_t s, Table *e) {
Udata *u; Udata *u;
if (s > MAX_SIZET - sizeof(Udata)) if (s > MAX_SIZET - sizeof(Udata))
luaM_toobig(L); luaM_toobig(L);
u = cast(Udata *, luaM_malloc(L, s + sizeof(Udata))); u = &luaC_newobj(L, LUA_TUSERDATA, sizeof(Udata) + s, NULL, 0)->u;
u->uv.marked = luaC_white(G(L)); /* is not finalized */
u->uv.tt = LUA_TUSERDATA;
u->uv.len = s; u->uv.len = s;
u->uv.metatable = NULL; u->uv.metatable = NULL;
u->uv.env = e; u->uv.env = e;
/* chain it on udata list (after main thread) */
u->uv.next = G(L)->mainthread->next;
G(L)->mainthread->next = obj2gco(u);
return u; return u;
} }

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: lstring.h,v 1.49.1.1 2013/04/12 18:48:47 roberto Exp $
** String table (keep all strings handled by Lua) ** String table (keep all strings handled by Lua)
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -7,7 +7,6 @@
#ifndef lstring_h #ifndef lstring_h
#define lstring_h #define lstring_h
#include "lgc.h" #include "lgc.h"
#include "lobject.h" #include "lobject.h"
#include "lstate.h" #include "lstate.h"
@ -17,15 +16,31 @@
#define sizeudata(u) (sizeof(union Udata)+(u)->len) #define sizeudata(u) (sizeof(union Udata)+(u)->len)
#define luaS_new(L, s) (luaS_newlstr(L, s, strlen(s)))
#define luaS_newliteral(L, s) (luaS_newlstr(L, "" s, \ #define luaS_newliteral(L, s) (luaS_newlstr(L, "" s, \
(sizeof(s)/sizeof(char))-1)) (sizeof(s)/sizeof(char))-1))
#define luaS_fix(s) l_setbit((s)->tsv.marked, FIXEDBIT) #define luaS_fix(s) l_setbit((s)->tsv.marked, FIXEDBIT)
/*
** test whether a string is a reserved word
*/
#define isreserved(s) ((s)->tsv.tt == LUA_TSHRSTR && (s)->tsv.extra > 0)
/*
** equality for short strings, which are always internalized
*/
#define eqshrstr(a,b) check_exp((a)->tsv.tt == LUA_TSHRSTR, (a) == (b))
LUAI_FUNC unsigned int luaS_hash (const char *str, size_t l, unsigned int seed);
LUAI_FUNC int luaS_eqlngstr (TString *a, TString *b);
LUAI_FUNC int luaS_eqstr (TString *a, TString *b);
LUAI_FUNC void luaS_resize (lua_State *L, int newsize); LUAI_FUNC void luaS_resize (lua_State *L, int newsize);
LUAI_FUNC Udata *luaS_newudata (lua_State *L, size_t s, Table *e); LUAI_FUNC Udata *luaS_newudata (lua_State *L, size_t s, Table *e);
LUAI_FUNC TString *luaS_newlstr (lua_State *L, const char *str, size_t l); LUAI_FUNC TString *luaS_newlstr (lua_State *L, const char *str, size_t l);
LUAI_FUNC TString *luaS_new (lua_State *L, const char *str);
#endif #endif

View file

@ -1,5 +1,5 @@
/* /*
** $Id: lstrlib.c,v 1.132.1.4 2008/07/11 17:27:21 roberto Exp $ ** $Id: lstrlib.c,v 1.178.1.1 2013/04/12 18:48:47 roberto Exp $
** Standard library for string operations and pattern-matching ** Standard library for string operations and pattern-matching
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -20,47 +20,58 @@
#include "lualib.h" #include "lualib.h"
/*
** maximum number of captures that a pattern can do during
** pattern-matching. This limit is arbitrary.
*/
#if !defined(LUA_MAXCAPTURES)
#define LUA_MAXCAPTURES 32
#endif
/* macro to `unsign' a character */ /* macro to `unsign' a character */
#define uchar(c) ((unsigned char)(c)) #define uchar(c) ((unsigned char)(c))
static int str_len (lua_State *L) { static int str_len (lua_State *L) {
size_t l; size_t l;
luaL_checklstring(L, 1, &l); luaL_checklstring(L, 1, &l);
lua_pushinteger(L, l); lua_pushinteger(L, (lua_Integer)l);
return 1; return 1;
} }
static ptrdiff_t posrelat (ptrdiff_t pos, size_t len) { /* translate a relative string position: negative means back from end */
/* relative string position: negative means back from end */ static size_t posrelat (ptrdiff_t pos, size_t len) {
if (pos < 0) pos += (ptrdiff_t)len + 1; if (pos >= 0) return (size_t)pos;
return (pos >= 0) ? pos : 0; else if (0u - (size_t)pos > len) return 0;
else return len - ((size_t)-pos) + 1;
} }
static int str_sub (lua_State *L) { static int str_sub (lua_State *L) {
size_t l; size_t l;
const char *s = luaL_checklstring(L, 1, &l); const char *s = luaL_checklstring(L, 1, &l);
ptrdiff_t start = posrelat(luaL_checkinteger(L, 2), l); size_t start = posrelat(luaL_checkinteger(L, 2), l);
ptrdiff_t end = posrelat(luaL_optinteger(L, 3, -1), l); size_t end = posrelat(luaL_optinteger(L, 3, -1), l);
if (start < 1) start = 1; if (start < 1) start = 1;
if (end > (ptrdiff_t)l) end = (ptrdiff_t)l; if (end > l) end = l;
if (start <= end) if (start <= end)
lua_pushlstring(L, s+start-1, end-start+1); lua_pushlstring(L, s + start - 1, end - start + 1);
else lua_pushliteral(L, ""); else lua_pushliteral(L, "");
return 1; return 1;
} }
static int str_reverse (lua_State *L) { static int str_reverse (lua_State *L) {
size_t l; size_t l, i;
luaL_Buffer b; luaL_Buffer b;
const char *s = luaL_checklstring(L, 1, &l); const char *s = luaL_checklstring(L, 1, &l);
luaL_buffinit(L, &b); char *p = luaL_buffinitsize(L, &b, l);
while (l--) luaL_addchar(&b, s[l]); for (i = 0; i < l; i++)
luaL_pushresult(&b); p[i] = s[l - i - 1];
luaL_pushresultsize(&b, l);
return 1; return 1;
} }
@ -70,10 +81,10 @@ static int str_lower (lua_State *L) {
size_t i; size_t i;
luaL_Buffer b; luaL_Buffer b;
const char *s = luaL_checklstring(L, 1, &l); const char *s = luaL_checklstring(L, 1, &l);
luaL_buffinit(L, &b); char *p = luaL_buffinitsize(L, &b, l);
for (i=0; i<l; i++) for (i=0; i<l; i++)
luaL_addchar(&b, tolower(uchar(s[i]))); p[i] = tolower(uchar(s[i]));
luaL_pushresult(&b); luaL_pushresultsize(&b, l);
return 1; return 1;
} }
@ -83,22 +94,38 @@ static int str_upper (lua_State *L) {
size_t i; size_t i;
luaL_Buffer b; luaL_Buffer b;
const char *s = luaL_checklstring(L, 1, &l); const char *s = luaL_checklstring(L, 1, &l);
luaL_buffinit(L, &b); char *p = luaL_buffinitsize(L, &b, l);
for (i=0; i<l; i++) for (i=0; i<l; i++)
luaL_addchar(&b, toupper(uchar(s[i]))); p[i] = toupper(uchar(s[i]));
luaL_pushresult(&b); luaL_pushresultsize(&b, l);
return 1; return 1;
} }
/* reasonable limit to avoid arithmetic overflow */
#define MAXSIZE ((~(size_t)0) >> 1)
static int str_rep (lua_State *L) { static int str_rep (lua_State *L) {
size_t l; size_t l, lsep;
luaL_Buffer b;
const char *s = luaL_checklstring(L, 1, &l); const char *s = luaL_checklstring(L, 1, &l);
int n = luaL_checkint(L, 2); int n = luaL_checkint(L, 2);
luaL_buffinit(L, &b); const char *sep = luaL_optlstring(L, 3, "", &lsep);
while (n-- > 0) if (n <= 0) lua_pushliteral(L, "");
luaL_addlstring(&b, s, l); else if (l + lsep < l || l + lsep >= MAXSIZE / n) /* may overflow? */
luaL_pushresult(&b); return luaL_error(L, "resulting string too large");
else {
size_t totallen = n * l + (n - 1) * lsep;
luaL_Buffer b;
char *p = luaL_buffinitsize(L, &b, totallen);
while (n-- > 1) { /* first n-1 copies (followed by separator) */
memcpy(p, s, l * sizeof(char)); p += l;
if (lsep > 0) { /* avoid empty 'memcpy' (may be expensive) */
memcpy(p, sep, lsep * sizeof(char)); p += lsep;
}
}
memcpy(p, s, l * sizeof(char)); /* last copy (not followed by separator) */
luaL_pushresultsize(&b, totallen);
}
return 1; return 1;
} }
@ -106,15 +133,15 @@ static int str_rep (lua_State *L) {
static int str_byte (lua_State *L) { static int str_byte (lua_State *L) {
size_t l; size_t l;
const char *s = luaL_checklstring(L, 1, &l); const char *s = luaL_checklstring(L, 1, &l);
ptrdiff_t posi = posrelat(luaL_optinteger(L, 2, 1), l); size_t posi = posrelat(luaL_optinteger(L, 2, 1), l);
ptrdiff_t pose = posrelat(luaL_optinteger(L, 3, posi), l); size_t pose = posrelat(luaL_optinteger(L, 3, posi), l);
int n, i; int n, i;
if (posi <= 0) posi = 1; if (posi < 1) posi = 1;
if ((size_t)pose > l) pose = l; if (pose > l) pose = l;
if (posi > pose) return 0; /* empty interval; return no values */ if (posi > pose) return 0; /* empty interval; return no values */
n = (int)(pose - posi + 1); n = (int)(pose - posi + 1);
if (posi + n <= pose) /* overflow? */ if (posi + n <= pose) /* (size_t -> int) overflow? */
luaL_error(L, "string slice too long"); return luaL_error(L, "string slice too long");
luaL_checkstack(L, n, "string slice too long"); luaL_checkstack(L, n, "string slice too long");
for (i=0; i<n; i++) for (i=0; i<n; i++)
lua_pushinteger(L, uchar(s[posi+i-1])); lua_pushinteger(L, uchar(s[posi+i-1]));
@ -126,13 +153,13 @@ static int str_char (lua_State *L) {
int n = lua_gettop(L); /* number of arguments */ int n = lua_gettop(L); /* number of arguments */
int i; int i;
luaL_Buffer b; luaL_Buffer b;
luaL_buffinit(L, &b); char *p = luaL_buffinitsize(L, &b, n);
for (i=1; i<=n; i++) { for (i=1; i<=n; i++) {
int c = luaL_checkint(L, i); int c = luaL_checkint(L, i);
luaL_argcheck(L, uchar(c) == c, i, "invalid value"); luaL_argcheck(L, uchar(c) == c, i, "value out of range");
luaL_addchar(&b, uchar(c)); p[i - 1] = uchar(c);
} }
luaL_pushresult(&b); luaL_pushresultsize(&b, n);
return 1; return 1;
} }
@ -150,7 +177,7 @@ static int str_dump (lua_State *L) {
lua_settop(L, 1); lua_settop(L, 1);
luaL_buffinit(L,&b); luaL_buffinit(L,&b);
if (lua_dump(L, writer, &b) != 0) if (lua_dump(L, writer, &b) != 0)
luaL_error(L, "unable to dump given function"); return luaL_error(L, "unable to dump given function");
luaL_pushresult(&b); luaL_pushresult(&b);
return 1; return 1;
} }
@ -167,9 +194,12 @@ static int str_dump (lua_State *L) {
#define CAP_UNFINISHED (-1) #define CAP_UNFINISHED (-1)
#define CAP_POSITION (-2) #define CAP_POSITION (-2)
typedef struct MatchState { typedef struct MatchState {
int matchdepth; /* control for recursive depth (to avoid C stack overflow) */
const char *src_init; /* init of source string */ const char *src_init; /* init of source string */
const char *src_end; /* end (`\0') of source string */ const char *src_end; /* end ('\0') of source string */
const char *p_end; /* end ('\0') of pattern */
lua_State *L; lua_State *L;
int level; /* total number of captures (finished or unfinished) */ int level; /* total number of captures (finished or unfinished) */
struct { struct {
@ -179,6 +209,16 @@ typedef struct MatchState {
} MatchState; } MatchState;
/* recursive function */
static const char *match (MatchState *ms, const char *s, const char *p);
/* maximum recursion depth for 'match' */
#if !defined(MAXCCALLS)
#define MAXCCALLS 200
#endif
#define L_ESC '%' #define L_ESC '%'
#define SPECIALS "^$*+?.([%-" #define SPECIALS "^$*+?.([%-"
@ -186,7 +226,7 @@ typedef struct MatchState {
static int check_capture (MatchState *ms, int l) { static int check_capture (MatchState *ms, int l) {
l -= '1'; l -= '1';
if (l < 0 || l >= ms->level || ms->capture[l].len == CAP_UNFINISHED) if (l < 0 || l >= ms->level || ms->capture[l].len == CAP_UNFINISHED)
return luaL_error(ms->L, "invalid capture index"); return luaL_error(ms->L, "invalid capture index %%%d", l + 1);
return l; return l;
} }
@ -202,16 +242,16 @@ static int capture_to_close (MatchState *ms) {
static const char *classend (MatchState *ms, const char *p) { static const char *classend (MatchState *ms, const char *p) {
switch (*p++) { switch (*p++) {
case L_ESC: { case L_ESC: {
if (*p == '\0') if (p == ms->p_end)
luaL_error(ms->L, "malformed pattern (ends with " LUA_QL("%%") ")"); luaL_error(ms->L, "malformed pattern (ends with " LUA_QL("%%") ")");
return p+1; return p+1;
} }
case '[': { case '[': {
if (*p == '^') p++; if (*p == '^') p++;
do { /* look for a `]' */ do { /* look for a `]' */
if (*p == '\0') if (p == ms->p_end)
luaL_error(ms->L, "malformed pattern (missing " LUA_QL("]") ")"); luaL_error(ms->L, "malformed pattern (missing " LUA_QL("]") ")");
if (*(p++) == L_ESC && *p != '\0') if (*(p++) == L_ESC && p < ms->p_end)
p++; /* skip escapes (e.g. `%]') */ p++; /* skip escapes (e.g. `%]') */
} while (*p != ']'); } while (*p != ']');
return p+1; return p+1;
@ -229,13 +269,14 @@ static int match_class (int c, int cl) {
case 'a' : res = isalpha(c); break; case 'a' : res = isalpha(c); break;
case 'c' : res = iscntrl(c); break; case 'c' : res = iscntrl(c); break;
case 'd' : res = isdigit(c); break; case 'd' : res = isdigit(c); break;
case 'g' : res = isgraph(c); break;
case 'l' : res = islower(c); break; case 'l' : res = islower(c); break;
case 'p' : res = ispunct(c); break; case 'p' : res = ispunct(c); break;
case 's' : res = isspace(c); break; case 's' : res = isspace(c); break;
case 'u' : res = isupper(c); break; case 'u' : res = isupper(c); break;
case 'w' : res = isalnum(c); break; case 'w' : res = isalnum(c); break;
case 'x' : res = isxdigit(c); break; case 'x' : res = isxdigit(c); break;
case 'z' : res = (c == 0); break; case 'z' : res = (c == 0); break; /* deprecated option */
default: return (cl == c); default: return (cl == c);
} }
return (islower(cl) ? res : !res); return (islower(cl) ? res : !res);
@ -265,23 +306,27 @@ static int matchbracketclass (int c, const char *p, const char *ec) {
} }
static int singlematch (int c, const char *p, const char *ep) { static int singlematch (MatchState *ms, const char *s, const char *p,
switch (*p) { const char *ep) {
case '.': return 1; /* matches any char */ if (s >= ms->src_end)
case L_ESC: return match_class(c, uchar(*(p+1))); return 0;
case '[': return matchbracketclass(c, p, ep-1); else {
default: return (uchar(*p) == c); int c = uchar(*s);
switch (*p) {
case '.': return 1; /* matches any char */
case L_ESC: return match_class(c, uchar(*(p+1)));
case '[': return matchbracketclass(c, p, ep-1);
default: return (uchar(*p) == c);
}
} }
} }
static const char *match (MatchState *ms, const char *s, const char *p);
static const char *matchbalance (MatchState *ms, const char *s, static const char *matchbalance (MatchState *ms, const char *s,
const char *p) { const char *p) {
if (*p == 0 || *(p+1) == 0) if (p >= ms->p_end - 1)
luaL_error(ms->L, "unbalanced pattern"); luaL_error(ms->L, "malformed pattern "
"(missing arguments to " LUA_QL("%%b") ")");
if (*s != *p) return NULL; if (*s != *p) return NULL;
else { else {
int b = *p; int b = *p;
@ -301,7 +346,7 @@ static const char *matchbalance (MatchState *ms, const char *s,
static const char *max_expand (MatchState *ms, const char *s, static const char *max_expand (MatchState *ms, const char *s,
const char *p, const char *ep) { const char *p, const char *ep) {
ptrdiff_t i = 0; /* counts maximum expand for item */ ptrdiff_t i = 0; /* counts maximum expand for item */
while ((s+i)<ms->src_end && singlematch(uchar(*(s+i)), p, ep)) while (singlematch(ms, s + i, p, ep))
i++; i++;
/* keeps trying to match with the maximum repetitions */ /* keeps trying to match with the maximum repetitions */
while (i>=0) { while (i>=0) {
@ -319,7 +364,7 @@ static const char *min_expand (MatchState *ms, const char *s,
const char *res = match(ms, s, ep+1); const char *res = match(ms, s, ep+1);
if (res != NULL) if (res != NULL)
return res; return res;
else if (s<ms->src_end && singlematch(uchar(*s), p, ep)) else if (singlematch(ms, s, p, ep))
s++; /* try with one more repetition */ s++; /* try with one more repetition */
else return NULL; else return NULL;
} }
@ -363,80 +408,105 @@ static const char *match_capture (MatchState *ms, const char *s, int l) {
static const char *match (MatchState *ms, const char *s, const char *p) { static const char *match (MatchState *ms, const char *s, const char *p) {
if (ms->matchdepth-- == 0)
luaL_error(ms->L, "pattern too complex");
init: /* using goto's to optimize tail recursion */ init: /* using goto's to optimize tail recursion */
switch (*p) { if (p != ms->p_end) { /* end of pattern? */
case '(': { /* start capture */ switch (*p) {
if (*(p+1) == ')') /* position capture? */ case '(': { /* start capture */
return start_capture(ms, s, p+2, CAP_POSITION); if (*(p + 1) == ')') /* position capture? */
else s = start_capture(ms, s, p + 2, CAP_POSITION);
return start_capture(ms, s, p+1, CAP_UNFINISHED); else
} s = start_capture(ms, s, p + 1, CAP_UNFINISHED);
case ')': { /* end capture */ break;
return end_capture(ms, s, p+1);
}
case L_ESC: {
switch (*(p+1)) {
case 'b': { /* balanced string? */
s = matchbalance(ms, s, p+2);
if (s == NULL) return NULL;
p+=4; goto init; /* else return match(ms, s, p+4); */
}
case 'f': { /* frontier? */
const char *ep; char previous;
p += 2;
if (*p != '[')
luaL_error(ms->L, "missing " LUA_QL("[") " after "
LUA_QL("%%f") " in pattern");
ep = classend(ms, p); /* points to what is next */
previous = (s == ms->src_init) ? '\0' : *(s-1);
if (matchbracketclass(uchar(previous), p, ep-1) ||
!matchbracketclass(uchar(*s), p, ep-1)) return NULL;
p=ep; goto init; /* else return match(ms, s, ep); */
}
default: {
if (isdigit(uchar(*(p+1)))) { /* capture results (%0-%9)? */
s = match_capture(ms, s, uchar(*(p+1)));
if (s == NULL) return NULL;
p+=2; goto init; /* else return match(ms, s, p+2) */
}
goto dflt; /* case default */
}
} }
} case ')': { /* end capture */
case '\0': { /* end of pattern */ s = end_capture(ms, s, p + 1);
return s; /* match succeeded */ break;
} }
case '$': { case '$': {
if (*(p+1) == '\0') /* is the `$' the last char in pattern? */ if ((p + 1) != ms->p_end) /* is the `$' the last char in pattern? */
return (s == ms->src_end) ? s : NULL; /* check end of string */ goto dflt; /* no; go to default */
else goto dflt; s = (s == ms->src_end) ? s : NULL; /* check end of string */
} break;
default: dflt: { /* it is a pattern item */ }
const char *ep = classend(ms, p); /* points to what is next */ case L_ESC: { /* escaped sequences not in the format class[*+?-]? */
int m = s<ms->src_end && singlematch(uchar(*s), p, ep); switch (*(p + 1)) {
switch (*ep) { case 'b': { /* balanced string? */
case '?': { /* optional */ s = matchbalance(ms, s, p + 2);
const char *res; if (s != NULL) {
if (m && ((res=match(ms, s+1, ep+1)) != NULL)) p += 4; goto init; /* return match(ms, s, p + 4); */
return res; } /* else fail (s == NULL) */
p=ep+1; goto init; /* else return match(ms, s, ep+1); */ break;
}
case 'f': { /* frontier? */
const char *ep; char previous;
p += 2;
if (*p != '[')
luaL_error(ms->L, "missing " LUA_QL("[") " after "
LUA_QL("%%f") " in pattern");
ep = classend(ms, p); /* points to what is next */
previous = (s == ms->src_init) ? '\0' : *(s - 1);
if (!matchbracketclass(uchar(previous), p, ep - 1) &&
matchbracketclass(uchar(*s), p, ep - 1)) {
p = ep; goto init; /* return match(ms, s, ep); */
}
s = NULL; /* match failed */
break;
}
case '0': case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
case '8': case '9': { /* capture results (%0-%9)? */
s = match_capture(ms, s, uchar(*(p + 1)));
if (s != NULL) {
p += 2; goto init; /* return match(ms, s, p + 2) */
}
break;
}
default: goto dflt;
} }
case '*': { /* 0 or more repetitions */ break;
return max_expand(ms, s, p, ep); }
default: dflt: { /* pattern class plus optional suffix */
const char *ep = classend(ms, p); /* points to optional suffix */
/* does not match at least once? */
if (!singlematch(ms, s, p, ep)) {
if (*ep == '*' || *ep == '?' || *ep == '-') { /* accept empty? */
p = ep + 1; goto init; /* return match(ms, s, ep + 1); */
}
else /* '+' or no suffix */
s = NULL; /* fail */
} }
case '+': { /* 1 or more repetitions */ else { /* matched once */
return (m ? max_expand(ms, s+1, p, ep) : NULL); switch (*ep) { /* handle optional suffix */
} case '?': { /* optional */
case '-': { /* 0 or more repetitions (minimum) */ const char *res;
return min_expand(ms, s, p, ep); if ((res = match(ms, s + 1, ep + 1)) != NULL)
} s = res;
default: { else {
if (!m) return NULL; p = ep + 1; goto init; /* else return match(ms, s, ep + 1); */
s++; p=ep; goto init; /* else return match(ms, s+1, ep); */ }
break;
}
case '+': /* 1 or more repetitions */
s++; /* 1 match already done */
/* go through */
case '*': /* 0 or more repetitions */
s = max_expand(ms, s, p, ep);
break;
case '-': /* 0 or more repetitions (minimum) */
s = min_expand(ms, s, p, ep);
break;
default: /* no suffix */
s++; p = ep; goto init; /* return match(ms, s + 1, ep); */
}
} }
break;
} }
} }
} }
ms->matchdepth++;
return s;
} }
@ -492,37 +562,58 @@ static int push_captures (MatchState *ms, const char *s, const char *e) {
} }
/* check whether pattern has no special characters */
static int nospecials (const char *p, size_t l) {
size_t upto = 0;
do {
if (strpbrk(p + upto, SPECIALS))
return 0; /* pattern has a special character */
upto += strlen(p + upto) + 1; /* may have more after \0 */
} while (upto <= l);
return 1; /* no special chars found */
}
static int str_find_aux (lua_State *L, int find) { static int str_find_aux (lua_State *L, int find) {
size_t l1, l2; size_t ls, lp;
const char *s = luaL_checklstring(L, 1, &l1); const char *s = luaL_checklstring(L, 1, &ls);
const char *p = luaL_checklstring(L, 2, &l2); const char *p = luaL_checklstring(L, 2, &lp);
ptrdiff_t init = posrelat(luaL_optinteger(L, 3, 1), l1) - 1; size_t init = posrelat(luaL_optinteger(L, 3, 1), ls);
if (init < 0) init = 0; if (init < 1) init = 1;
else if ((size_t)(init) > l1) init = (ptrdiff_t)l1; else if (init > ls + 1) { /* start after string's end? */
if (find && (lua_toboolean(L, 4) || /* explicit request? */ lua_pushnil(L); /* cannot find anything */
strpbrk(p, SPECIALS) == NULL)) { /* or no special characters? */ return 1;
}
/* explicit request or no special characters? */
if (find && (lua_toboolean(L, 4) || nospecials(p, lp))) {
/* do a plain search */ /* do a plain search */
const char *s2 = lmemfind(s+init, l1-init, p, l2); const char *s2 = lmemfind(s + init - 1, ls - init + 1, p, lp);
if (s2) { if (s2) {
lua_pushinteger(L, s2-s+1); lua_pushinteger(L, s2 - s + 1);
lua_pushinteger(L, s2-s+l2); lua_pushinteger(L, s2 - s + lp);
return 2; return 2;
} }
} }
else { else {
MatchState ms; MatchState ms;
int anchor = (*p == '^') ? (p++, 1) : 0; const char *s1 = s + init - 1;
const char *s1=s+init; int anchor = (*p == '^');
if (anchor) {
p++; lp--; /* skip anchor character */
}
ms.L = L; ms.L = L;
ms.matchdepth = MAXCCALLS;
ms.src_init = s; ms.src_init = s;
ms.src_end = s+l1; ms.src_end = s + ls;
ms.p_end = p + lp;
do { do {
const char *res; const char *res;
ms.level = 0; ms.level = 0;
lua_assert(ms.matchdepth == MAXCCALLS);
if ((res=match(&ms, s1, p)) != NULL) { if ((res=match(&ms, s1, p)) != NULL) {
if (find) { if (find) {
lua_pushinteger(L, s1-s+1); /* start */ lua_pushinteger(L, s1 - s + 1); /* start */
lua_pushinteger(L, res-s); /* end */ lua_pushinteger(L, res - s); /* end */
return push_captures(&ms, NULL, 0) + 2; return push_captures(&ms, NULL, 0) + 2;
} }
else else
@ -547,18 +638,21 @@ static int str_match (lua_State *L) {
static int gmatch_aux (lua_State *L) { static int gmatch_aux (lua_State *L) {
MatchState ms; MatchState ms;
size_t ls; size_t ls, lp;
const char *s = lua_tolstring(L, lua_upvalueindex(1), &ls); const char *s = lua_tolstring(L, lua_upvalueindex(1), &ls);
const char *p = lua_tostring(L, lua_upvalueindex(2)); const char *p = lua_tolstring(L, lua_upvalueindex(2), &lp);
const char *src; const char *src;
ms.L = L; ms.L = L;
ms.matchdepth = MAXCCALLS;
ms.src_init = s; ms.src_init = s;
ms.src_end = s+ls; ms.src_end = s+ls;
ms.p_end = p + lp;
for (src = s + (size_t)lua_tointeger(L, lua_upvalueindex(3)); for (src = s + (size_t)lua_tointeger(L, lua_upvalueindex(3));
src <= ms.src_end; src <= ms.src_end;
src++) { src++) {
const char *e; const char *e;
ms.level = 0; ms.level = 0;
lua_assert(ms.matchdepth == MAXCCALLS);
if ((e = match(&ms, src, p)) != NULL) { if ((e = match(&ms, src, p)) != NULL) {
lua_Integer newstart = e-s; lua_Integer newstart = e-s;
if (e == src) newstart++; /* empty match? go at least one position */ if (e == src) newstart++; /* empty match? go at least one position */
@ -581,12 +675,6 @@ static int gmatch (lua_State *L) {
} }
static int gfind_nodef (lua_State *L) {
return luaL_error(L, LUA_QL("string.gfind") " was renamed to "
LUA_QL("string.gmatch"));
}
static void add_s (MatchState *ms, luaL_Buffer *b, const char *s, static void add_s (MatchState *ms, luaL_Buffer *b, const char *s,
const char *e) { const char *e) {
size_t l, i; size_t l, i;
@ -596,8 +684,12 @@ static void add_s (MatchState *ms, luaL_Buffer *b, const char *s,
luaL_addchar(b, news[i]); luaL_addchar(b, news[i]);
else { else {
i++; /* skip ESC */ i++; /* skip ESC */
if (!isdigit(uchar(news[i]))) if (!isdigit(uchar(news[i]))) {
if (news[i] != L_ESC)
luaL_error(ms->L, "invalid use of " LUA_QL("%c")
" in replacement string", L_ESC);
luaL_addchar(b, news[i]); luaL_addchar(b, news[i]);
}
else if (news[i] == '0') else if (news[i] == '0')
luaL_addlstring(b, s, e - s); luaL_addlstring(b, s, e - s);
else { else {
@ -610,14 +702,9 @@ static void add_s (MatchState *ms, luaL_Buffer *b, const char *s,
static void add_value (MatchState *ms, luaL_Buffer *b, const char *s, static void add_value (MatchState *ms, luaL_Buffer *b, const char *s,
const char *e) { const char *e, int tr) {
lua_State *L = ms->L; lua_State *L = ms->L;
switch (lua_type(L, 3)) { switch (tr) {
case LUA_TNUMBER:
case LUA_TSTRING: {
add_s(ms, b, s, e);
return;
}
case LUA_TFUNCTION: { case LUA_TFUNCTION: {
int n; int n;
lua_pushvalue(L, 3); lua_pushvalue(L, 3);
@ -630,41 +717,51 @@ static void add_value (MatchState *ms, luaL_Buffer *b, const char *s,
lua_gettable(L, 3); lua_gettable(L, 3);
break; break;
} }
default: { /* LUA_TNUMBER or LUA_TSTRING */
add_s(ms, b, s, e);
return;
}
} }
if (!lua_toboolean(L, -1)) { /* nil or false? */ if (!lua_toboolean(L, -1)) { /* nil or false? */
lua_pop(L, 1); lua_pop(L, 1);
lua_pushlstring(L, s, e - s); /* keep original text */ lua_pushlstring(L, s, e - s); /* keep original text */
} }
else if (!lua_isstring(L, -1)) else if (!lua_isstring(L, -1))
luaL_error(L, "invalid replacement value (a %s)", luaL_typename(L, -1)); luaL_error(L, "invalid replacement value (a %s)", luaL_typename(L, -1));
luaL_addvalue(b); /* add result to accumulator */ luaL_addvalue(b); /* add result to accumulator */
} }
static int str_gsub (lua_State *L) { static int str_gsub (lua_State *L) {
size_t srcl; size_t srcl, lp;
const char *src = luaL_checklstring(L, 1, &srcl); const char *src = luaL_checklstring(L, 1, &srcl);
const char *p = luaL_checkstring(L, 2); const char *p = luaL_checklstring(L, 2, &lp);
int tr = lua_type(L, 3); int tr = lua_type(L, 3);
int max_s = luaL_optint(L, 4, srcl+1); size_t max_s = luaL_optinteger(L, 4, srcl+1);
int anchor = (*p == '^') ? (p++, 1) : 0; int anchor = (*p == '^');
int n = 0; size_t n = 0;
MatchState ms; MatchState ms;
luaL_Buffer b; luaL_Buffer b;
luaL_argcheck(L, tr == LUA_TNUMBER || tr == LUA_TSTRING || luaL_argcheck(L, tr == LUA_TNUMBER || tr == LUA_TSTRING ||
tr == LUA_TFUNCTION || tr == LUA_TTABLE, 3, tr == LUA_TFUNCTION || tr == LUA_TTABLE, 3,
"string/function/table expected"); "string/function/table expected");
luaL_buffinit(L, &b); luaL_buffinit(L, &b);
if (anchor) {
p++; lp--; /* skip anchor character */
}
ms.L = L; ms.L = L;
ms.matchdepth = MAXCCALLS;
ms.src_init = src; ms.src_init = src;
ms.src_end = src+srcl; ms.src_end = src+srcl;
ms.p_end = p + lp;
while (n < max_s) { while (n < max_s) {
const char *e; const char *e;
ms.level = 0; ms.level = 0;
lua_assert(ms.matchdepth == MAXCCALLS);
e = match(&ms, src, p); e = match(&ms, src, p);
if (e) { if (e) {
n++; n++;
add_value(&ms, &b, src, e); add_value(&ms, &b, src, e, tr);
} }
if (e && e>src) /* non empty match? */ if (e && e>src) /* non empty match? */
src = e; /* skip it */ src = e; /* skip it */
@ -682,6 +779,46 @@ static int str_gsub (lua_State *L) {
/* }====================================================== */ /* }====================================================== */
/*
** {======================================================
** STRING FORMAT
** =======================================================
*/
/*
** LUA_INTFRMLEN is the length modifier for integer conversions in
** 'string.format'; LUA_INTFRM_T is the integer type corresponding to
** the previous length
*/
#if !defined(LUA_INTFRMLEN) /* { */
#if defined(LUA_USE_LONGLONG)
#define LUA_INTFRMLEN "ll"
#define LUA_INTFRM_T long long
#else
#define LUA_INTFRMLEN "l"
#define LUA_INTFRM_T long
#endif
#endif /* } */
/*
** LUA_FLTFRMLEN is the length modifier for float conversions in
** 'string.format'; LUA_FLTFRM_T is the float type corresponding to
** the previous length
*/
#if !defined(LUA_FLTFRMLEN)
#define LUA_FLTFRMLEN ""
#define LUA_FLTFRM_T double
#endif
/* maximum size of each formatted item (> len(format('%99.99f', -1e308))) */ /* maximum size of each formatted item (> len(format('%99.99f', -1e308))) */
#define MAX_ITEM 512 #define MAX_ITEM 512
/* valid flags in a format specification */ /* valid flags in a format specification */
@ -698,25 +835,20 @@ static void addquoted (lua_State *L, luaL_Buffer *b, int arg) {
const char *s = luaL_checklstring(L, arg, &l); const char *s = luaL_checklstring(L, arg, &l);
luaL_addchar(b, '"'); luaL_addchar(b, '"');
while (l--) { while (l--) {
switch (*s) { if (*s == '"' || *s == '\\' || *s == '\n') {
case '"': case '\\': case '\n': { luaL_addchar(b, '\\');
luaL_addchar(b, '\\'); luaL_addchar(b, *s);
luaL_addchar(b, *s);
break;
}
case '\r': {
luaL_addlstring(b, "\\r", 2);
break;
}
case '\0': {
luaL_addlstring(b, "\\000", 4);
break;
}
default: {
luaL_addchar(b, *s);
break;
}
} }
else if (*s == '\0' || iscntrl(uchar(*s))) {
char buff[10];
if (!isdigit(uchar(*(s+1))))
snprintf(buff, sizeof(buff), "\\%d", (int)uchar(*s));
else
snprintf(buff, sizeof(buff), "\\%03d", (int)uchar(*s));
luaL_addstring(b, buff);
}
else
luaL_addchar(b, *s);
s++; s++;
} }
luaL_addchar(b, '"'); luaL_addchar(b, '"');
@ -725,7 +857,7 @@ static void addquoted (lua_State *L, luaL_Buffer *b, int arg) {
static const char *scanformat (lua_State *L, const char *strfrmt, char *form) { static const char *scanformat (lua_State *L, const char *strfrmt, char *form) {
const char *p = strfrmt; const char *p = strfrmt;
while (*p != '\0' && strchr(FLAGS, *p) != NULL) p++; /* skip flags */ while (*p != '\0' && strchr(FLAGS, *p) != NULL) p++; /* skip flags */
if ((size_t)(p - strfrmt) >= sizeof(FLAGS)) if ((size_t)(p - strfrmt) >= sizeof(FLAGS)/sizeof(char))
luaL_error(L, "invalid format (repeated flags)"); luaL_error(L, "invalid format (repeated flags)");
if (isdigit(uchar(*p))) p++; /* skip width */ if (isdigit(uchar(*p))) p++; /* skip width */
if (isdigit(uchar(*p))) p++; /* (2 digits at most) */ if (isdigit(uchar(*p))) p++; /* (2 digits at most) */
@ -737,23 +869,28 @@ static const char *scanformat (lua_State *L, const char *strfrmt, char *form) {
if (isdigit(uchar(*p))) if (isdigit(uchar(*p)))
luaL_error(L, "invalid format (width or precision too long)"); luaL_error(L, "invalid format (width or precision too long)");
*(form++) = '%'; *(form++) = '%';
strncpy(form, strfrmt, p - strfrmt + 1); memcpy(form, strfrmt, (p - strfrmt + 1) * sizeof(char));
form += p - strfrmt + 1; form += p - strfrmt + 1;
*form = '\0'; *form = '\0';
return p; return p;
} }
static void addintlen (char *form) { /*
** add length modifier into formats
*/
static void addlenmod (char *form, const char *lenmod) {
size_t l = strlen(form); size_t l = strlen(form);
size_t lm = strlen(lenmod);
char spec = form[l - 1]; char spec = form[l - 1];
strcpy(form + l - 1, LUA_INTFRMLEN); strcpy(form + l - 1, lenmod);
form[l + sizeof(LUA_INTFRMLEN) - 2] = spec; form[l + lm - 1] = spec;
form[l + sizeof(LUA_INTFRMLEN) - 1] = '\0'; form[l + lm] = '\0';
} }
static int str_format (lua_State *L) { static int str_format (lua_State *L) {
int top = lua_gettop(L);
int arg = 1; int arg = 1;
size_t sfl; size_t sfl;
const char *strfrmt = luaL_checklstring(L, arg, &sfl); const char *strfrmt = luaL_checklstring(L, arg, &sfl);
@ -767,45 +904,61 @@ static int str_format (lua_State *L) {
luaL_addchar(&b, *strfrmt++); /* %% */ luaL_addchar(&b, *strfrmt++); /* %% */
else { /* format item */ else { /* format item */
char form[MAX_FORMAT]; /* to store the format (`%...') */ char form[MAX_FORMAT]; /* to store the format (`%...') */
char buff[MAX_ITEM]; /* to store the formatted item */ char *buff = luaL_prepbuffsize(&b, MAX_ITEM); /* to put formatted item */
arg++; int nb = 0; /* number of bytes in added item */
if (++arg > top)
luaL_argerror(L, arg, "no value");
strfrmt = scanformat(L, strfrmt, form); strfrmt = scanformat(L, strfrmt, form);
switch (*strfrmt++) { switch (*strfrmt++) {
case 'c': { case 'c': {
snprintf(buff, MAX_ITEM, form, (int)luaL_checknumber(L, arg)); nb = snprintf(buff, MAX_ITEM, form, luaL_checkint(L, arg));
break; break;
} }
case 'd': case 'i': { case 'd': case 'i': {
addintlen(form); lua_Number n = luaL_checknumber(L, arg);
snprintf(buff, MAX_ITEM, form, (LUA_INTFRM_T)luaL_checknumber(L, arg)); LUA_INTFRM_T ni = (LUA_INTFRM_T)n;
lua_Number diff = n - (lua_Number)ni;
luaL_argcheck(L, -1 < diff && diff < 1, arg,
"not a number in proper range");
addlenmod(form, LUA_INTFRMLEN);
nb = snprintf(buff, MAX_ITEM, form, ni);
break; break;
} }
case 'o': case 'u': case 'x': case 'X': { case 'o': case 'u': case 'x': case 'X': {
addintlen(form); lua_Number n = luaL_checknumber(L, arg);
snprintf(buff, MAX_ITEM, form, (unsigned LUA_INTFRM_T)luaL_checknumber(L, arg)); unsigned LUA_INTFRM_T ni = (unsigned LUA_INTFRM_T)n;
lua_Number diff = n - (lua_Number)ni;
luaL_argcheck(L, -1 < diff && diff < 1, arg,
"not a non-negative number in proper range");
addlenmod(form, LUA_INTFRMLEN);
nb = snprintf(buff, MAX_ITEM, form, ni);
break; break;
} }
case 'e': case 'E': case 'f': case 'e': case 'E': case 'f':
#if defined(LUA_USE_AFORMAT)
case 'a': case 'A':
#endif
case 'g': case 'G': { case 'g': case 'G': {
snprintf(buff, MAX_ITEM, form, (double)luaL_checknumber(L, arg)); addlenmod(form, LUA_FLTFRMLEN);
nb = snprintf(buff, MAX_ITEM, form, (LUA_FLTFRM_T)luaL_checknumber(L, arg));
break; break;
} }
case 'q': { case 'q': {
addquoted(L, &b, arg); addquoted(L, &b, arg);
continue; /* skip the 'addsize' at the end */ break;
} }
case 's': { case 's': {
size_t l; size_t l;
const char *s = luaL_checklstring(L, arg, &l); const char *s = luaL_tolstring(L, arg, &l);
if (!strchr(form, '.') && l >= 100) { if (!strchr(form, '.') && l >= 100) {
/* no precision and string is too long to be formatted; /* no precision and string is too long to be formatted;
keep original string */ keep original string */
lua_pushvalue(L, arg);
luaL_addvalue(&b); luaL_addvalue(&b);
continue; /* skip the `addsize' at the end */ break;
} }
else { else {
snprintf(buff, MAX_ITEM, form, s); nb = snprintf(buff, MAX_ITEM, form, s);
lua_pop(L, 1); /* remove result from 'luaL_tolstring' */
break; break;
} }
} }
@ -814,13 +967,15 @@ static int str_format (lua_State *L) {
LUA_QL("format"), *(strfrmt - 1)); LUA_QL("format"), *(strfrmt - 1));
} }
} }
luaL_addlstring(&b, buff, strlen(buff)); luaL_addsize(&b, nb);
} }
} }
luaL_pushresult(&b); luaL_pushresult(&b);
return 1; return 1;
} }
/* }====================================================== */
static const luaL_Reg strlib[] = { static const luaL_Reg strlib[] = {
{"byte", str_byte}, {"byte", str_byte},
@ -828,7 +983,6 @@ static const luaL_Reg strlib[] = {
{"dump", str_dump}, {"dump", str_dump},
{"find", str_find}, {"find", str_find},
{"format", str_format}, {"format", str_format},
{"gfind", gfind_nodef},
{"gmatch", gmatch}, {"gmatch", gmatch},
{"gsub", str_gsub}, {"gsub", str_gsub},
{"len", str_len}, {"len", str_len},
@ -843,13 +997,13 @@ static const luaL_Reg strlib[] = {
static void createmetatable (lua_State *L) { static void createmetatable (lua_State *L) {
lua_createtable(L, 0, 1); /* create metatable for strings */ lua_createtable(L, 0, 1); /* table to be metatable for strings */
lua_pushliteral(L, ""); /* dummy string */ lua_pushliteral(L, ""); /* dummy string */
lua_pushvalue(L, -2); lua_pushvalue(L, -2); /* copy table */
lua_setmetatable(L, -2); /* set string metatable */ lua_setmetatable(L, -2); /* set table as metatable for strings */
lua_pop(L, 1); /* pop dummy string */ lua_pop(L, 1); /* pop dummy string */
lua_pushvalue(L, -2); /* string library... */ lua_pushvalue(L, -2); /* get string library */
lua_setfield(L, -2, "__index"); /* ...is the __index metamethod */ lua_setfield(L, -2, "__index"); /* metatable.__index = string */
lua_pop(L, 1); /* pop metatable */ lua_pop(L, 1); /* pop metatable */
} }
@ -857,12 +1011,8 @@ static void createmetatable (lua_State *L) {
/* /*
** Open string library ** Open string library
*/ */
LUALIB_API int luaopen_string (lua_State *L) { LUAMOD_API int luaopen_string (lua_State *L) {
luaL_register(L, LUA_STRLIBNAME, strlib); luaL_newlib(L, strlib);
#if defined(LUA_COMPAT_GFIND)
lua_getfield(L, -1, "gmatch");
lua_setfield(L, -2, "gfind");
#endif
createmetatable(L); createmetatable(L);
return 1; return 1;
} }

View file

@ -1,5 +1,5 @@
/* /*
** $Id: ltable.c,v 2.32.1.2 2007/12/28 15:32:23 roberto Exp $ ** $Id: ltable.c,v 2.72.1.1 2013/04/12 18:48:47 roberto Exp $
** Lua tables (hash) ** Lua tables (hash)
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -18,7 +18,6 @@
** Hence even when the load factor reaches 100%, performance remains good. ** Hence even when the load factor reaches 100%, performance remains good.
*/ */
#include <math.h>
#include <string.h> #include <string.h>
#define ltable_c #define ltable_c
@ -32,14 +31,16 @@
#include "lmem.h" #include "lmem.h"
#include "lobject.h" #include "lobject.h"
#include "lstate.h" #include "lstate.h"
#include "lstring.h"
#include "ltable.h" #include "ltable.h"
#include "lvm.h"
/* /*
** max size of array part is 2^MAXBITS ** max size of array part is 2^MAXBITS
*/ */
#if LUAI_BITSINT > 26 #if LUAI_BITSINT >= 32
#define MAXBITS 26 #define MAXBITS 30
#else #else
#define MAXBITS (LUAI_BITSINT-2) #define MAXBITS (LUAI_BITSINT-2)
#endif #endif
@ -47,10 +48,10 @@
#define MAXASIZE (1 << MAXBITS) #define MAXASIZE (1 << MAXBITS)
#define hashpow2(t,n) (gnode(t, lmod((n), sizenode(t)))) #define hashpow2(t,n) (gnode(t, lmod((n), sizenode(t))))
#define hashstr(t,str) hashpow2(t, (str)->tsv.hash) #define hashstr(t,str) hashpow2(t, (str)->tsv.hash)
#define hashboolean(t,p) hashpow2(t, p) #define hashboolean(t,p) hashpow2(t, p)
/* /*
@ -72,9 +73,11 @@
#define dummynode (&dummynode_) #define dummynode (&dummynode_)
#define isdummy(n) ((n) == dummynode)
static const Node dummynode_ = { static const Node dummynode_ = {
{{NULL}, LUA_TNIL}, /* value */ {NILCONSTANT}, /* value */
{{{NULL}, LUA_TNIL, NULL}} /* key */ {{NILCONSTANT, NULL}} /* key */
}; };
@ -101,12 +104,22 @@ static Node *mainposition (const Table *t, const TValue *key) {
switch (ttype(key)) { switch (ttype(key)) {
case LUA_TNUMBER: case LUA_TNUMBER:
return hashnum(t, nvalue(key)); return hashnum(t, nvalue(key));
case LUA_TSTRING: case LUA_TLNGSTR: {
TString *s = rawtsvalue(key);
if (s->tsv.extra == 0) { /* no hash? */
s->tsv.hash = luaS_hash(getstr(s), s->tsv.len, s->tsv.hash);
s->tsv.extra = 1; /* now it has its hash */
}
return hashstr(t, rawtsvalue(key));
}
case LUA_TSHRSTR:
return hashstr(t, rawtsvalue(key)); return hashstr(t, rawtsvalue(key));
case LUA_TBOOLEAN: case LUA_TBOOLEAN:
return hashboolean(t, bvalue(key)); return hashboolean(t, bvalue(key));
case LUA_TLIGHTUSERDATA: case LUA_TLIGHTUSERDATA:
return hashpointer(t, pvalue(key)); return hashpointer(t, pvalue(key));
case LUA_TLCF:
return hashpointer(t, fvalue(key));
default: default:
return hashpointer(t, gcvalue(key)); return hashpointer(t, gcvalue(key));
} }
@ -132,7 +145,7 @@ static int arrayindex (const TValue *key) {
/* /*
** returns the index of a `key' for table traversals. First goes all ** returns the index of a `key' for table traversals. First goes all
** elements in the array part, then elements in the hash part. The ** elements in the array part, then elements in the hash part. The
** beginning of a traversal is signalled by -1. ** beginning of a traversal is signaled by -1.
*/ */
static int findindex (lua_State *L, Table *t, StkId key) { static int findindex (lua_State *L, Table *t, StkId key) {
int i; int i;
@ -142,19 +155,19 @@ static int findindex (lua_State *L, Table *t, StkId key) {
return i-1; /* yes; that's the index (corrected to C) */ return i-1; /* yes; that's the index (corrected to C) */
else { else {
Node *n = mainposition(t, key); Node *n = mainposition(t, key);
do { /* check whether `key' is somewhere in the chain */ for (;;) { /* check whether `key' is somewhere in the chain */
/* key may be dead already, but it is ok to use it in `next' */ /* key may be dead already, but it is ok to use it in `next' */
if (luaO_rawequalObj(key2tval(n), key) || if (luaV_rawequalobj(gkey(n), key) ||
(ttype(gkey(n)) == LUA_TDEADKEY && iscollectable(key) && (ttisdeadkey(gkey(n)) && iscollectable(key) &&
gcvalue(gkey(n)) == gcvalue(key))) { deadvalue(gkey(n)) == gcvalue(key))) {
i = cast_int(n - gnode(t, 0)); /* key index in hash table */ i = cast_int(n - gnode(t, 0)); /* key index in hash table */
/* hash elements are numbered after array ones */ /* hash elements are numbered after array ones */
return i + t->sizearray; return i + t->sizearray;
} }
else n = gnext(n); else n = gnext(n);
} while (n); if (n == NULL)
luaG_runerror(L, "invalid key to " LUA_QL("next")); /* key not found */ luaG_runerror(L, "invalid key to " LUA_QL("next")); /* key not found */
return 0; /* to avoid warnings */ }
} }
} }
@ -170,7 +183,7 @@ int luaH_next (lua_State *L, Table *t, StkId key) {
} }
for (i -= t->sizearray; i < sizenode(t); i++) { /* then hash part */ for (i -= t->sizearray; i < sizenode(t); i++) { /* then hash part */
if (!ttisnil(gval(gnode(t, i)))) { /* a non-nil value? */ if (!ttisnil(gval(gnode(t, i)))) { /* a non-nil value? */
setobj2s(L, key, key2tval(gnode(t, i))); setobj2s(L, key, gkey(gnode(t, i)));
setobj2s(L, key+1, gval(gnode(t, i))); setobj2s(L, key+1, gval(gnode(t, i)));
return 1; return 1;
} }
@ -211,7 +224,7 @@ static int computesizes (int nums[], int *narray) {
static int countint (const TValue *key, int *nums) { static int countint (const TValue *key, int *nums) {
int k = arrayindex(key); int k = arrayindex(key);
if (0 < k && k <= MAXASIZE) { /* is `key' an appropriate array index? */ if (0 < k && k <= MAXASIZE) { /* is `key' an appropriate array index? */
nums[ceillog2(k)]++; /* count as such */ nums[luaO_ceillog2(k)]++; /* count as such */
return 1; return 1;
} }
else else
@ -251,7 +264,7 @@ static int numusehash (const Table *t, int *nums, int *pnasize) {
while (i--) { while (i--) {
Node *n = &t->node[i]; Node *n = &t->node[i];
if (!ttisnil(gval(n))) { if (!ttisnil(gval(n))) {
ause += countint(key2tval(n), nums); ause += countint(gkey(n), nums);
totaluse++; totaluse++;
} }
} }
@ -277,7 +290,7 @@ static void setnodevector (lua_State *L, Table *t, int size) {
} }
else { else {
int i; int i;
lsize = ceillog2(size); lsize = luaO_ceillog2(size);
if (lsize > MAXBITS) if (lsize > MAXBITS)
luaG_runerror(L, "table overflow"); luaG_runerror(L, "table overflow");
size = twoto(lsize); size = twoto(lsize);
@ -294,7 +307,7 @@ static void setnodevector (lua_State *L, Table *t, int size) {
} }
static void resize (lua_State *L, Table *t, int nasize, int nhsize) { void luaH_resize (lua_State *L, Table *t, int nasize, int nhsize) {
int i; int i;
int oldasize = t->sizearray; int oldasize = t->sizearray;
int oldhsize = t->lsizenode; int oldhsize = t->lsizenode;
@ -302,13 +315,13 @@ static void resize (lua_State *L, Table *t, int nasize, int nhsize) {
if (nasize > oldasize) /* array part must grow? */ if (nasize > oldasize) /* array part must grow? */
setarrayvector(L, t, nasize); setarrayvector(L, t, nasize);
/* create new hash part with appropriate size */ /* create new hash part with appropriate size */
setnodevector(L, t, nhsize); setnodevector(L, t, nhsize);
if (nasize < oldasize) { /* array part must shrink? */ if (nasize < oldasize) { /* array part must shrink? */
t->sizearray = nasize; t->sizearray = nasize;
/* re-insert elements from vanishing slice */ /* re-insert elements from vanishing slice */
for (i=nasize; i<oldasize; i++) { for (i=nasize; i<oldasize; i++) {
if (!ttisnil(&t->array[i])) if (!ttisnil(&t->array[i]))
setobjt2t(L, luaH_setnum(L, t, i+1), &t->array[i]); luaH_setint(L, t, i + 1, &t->array[i]);
} }
/* shrink array */ /* shrink array */
luaM_reallocvector(L, t->array, oldasize, nasize, TValue); luaM_reallocvector(L, t->array, oldasize, nasize, TValue);
@ -316,23 +329,26 @@ static void resize (lua_State *L, Table *t, int nasize, int nhsize) {
/* re-insert elements from hash part */ /* re-insert elements from hash part */
for (i = twoto(oldhsize) - 1; i >= 0; i--) { for (i = twoto(oldhsize) - 1; i >= 0; i--) {
Node *old = nold+i; Node *old = nold+i;
if (!ttisnil(gval(old))) if (!ttisnil(gval(old))) {
setobjt2t(L, luaH_set(L, t, key2tval(old)), gval(old)); /* doesn't need barrier/invalidate cache, as entry was
already present in the table */
setobjt2t(L, luaH_set(L, t, gkey(old)), gval(old));
}
} }
if (nold != dummynode) if (!isdummy(nold))
luaM_freearray(L, nold, twoto(oldhsize), Node); /* free old array */ luaM_freearray(L, nold, cast(size_t, twoto(oldhsize))); /* free old array */
} }
void luaH_resizearray (lua_State *L, Table *t, int nasize) { void luaH_resizearray (lua_State *L, Table *t, int nasize) {
int nsize = (t->node == dummynode) ? 0 : sizenode(t); int nsize = isdummy(t->node) ? 0 : sizenode(t);
resize(L, t, nasize, nsize); luaH_resize(L, t, nasize, nsize);
} }
static void rehash (lua_State *L, Table *t, const TValue *ek) { static void rehash (lua_State *L, Table *t, const TValue *ek) {
int nasize, na; int nasize, na;
int nums[MAXBITS+1]; /* nums[i] = number of keys between 2^(i-1) and 2^i */ int nums[MAXBITS+1]; /* nums[i] = number of keys with 2^(i-1) < k <= 2^i */
int i; int i;
int totaluse; int totaluse;
for (i=0; i<=MAXBITS; i++) nums[i] = 0; /* reset counts */ for (i=0; i<=MAXBITS; i++) nums[i] = 0; /* reset counts */
@ -345,7 +361,7 @@ static void rehash (lua_State *L, Table *t, const TValue *ek) {
/* compute new size for array part */ /* compute new size for array part */
na = computesizes(nums, &nasize); na = computesizes(nums, &nasize);
/* resize the table to new computed sizes */ /* resize the table to new computed sizes */
resize(L, t, nasize, totaluse - na); luaH_resize(L, t, nasize, totaluse - na);
} }
@ -355,32 +371,28 @@ static void rehash (lua_State *L, Table *t, const TValue *ek) {
*/ */
Table *luaH_new (lua_State *L, int narray, int nhash) { Table *luaH_new (lua_State *L) {
Table *t = luaM_new(L, Table); Table *t = &luaC_newobj(L, LUA_TTABLE, sizeof(Table), NULL, 0)->h;
luaC_link(L, obj2gco(t), LUA_TTABLE);
t->metatable = NULL; t->metatable = NULL;
t->flags = cast_byte(~0); t->flags = cast_byte(~0);
/* temporary values (kept only if some malloc fails) */
t->array = NULL; t->array = NULL;
t->sizearray = 0; t->sizearray = 0;
t->lsizenode = 0; setnodevector(L, t, 0);
t->node = cast(Node *, dummynode);
setarrayvector(L, t, narray);
setnodevector(L, t, nhash);
return t; return t;
} }
void luaH_free (lua_State *L, Table *t) { void luaH_free (lua_State *L, Table *t) {
if (t->node != dummynode) if (!isdummy(t->node))
luaM_freearray(L, t->node, sizenode(t), Node); luaM_freearray(L, t->node, cast(size_t, sizenode(t)));
luaM_freearray(L, t->array, t->sizearray, TValue); luaM_freearray(L, t->array, t->sizearray);
luaM_free(L, t); luaM_free(L, t);
} }
static Node *getfreepos (Table *t) { static Node *getfreepos (Table *t) {
while (t->lastfree-- > t->node) { while (t->lastfree > t->node) {
t->lastfree--;
if (ttisnil(gkey(t->lastfree))) if (ttisnil(gkey(t->lastfree)))
return t->lastfree; return t->lastfree;
} }
@ -390,23 +402,28 @@ static Node *getfreepos (Table *t) {
/* /*
** inserts a new key into a hash table; first, check whether key's main ** inserts a new key into a hash table; first, check whether key's main
** position is free. If not, check whether colliding node is in its main ** position is free. If not, check whether colliding node is in its main
** position or not: if it is not, move colliding node to an empty place and ** position or not: if it is not, move colliding node to an empty place and
** put new key in its main position; otherwise (colliding node is in its main ** put new key in its main position; otherwise (colliding node is in its main
** position), new key goes to an empty position. ** position), new key goes to an empty position.
*/ */
static TValue *newkey (lua_State *L, Table *t, const TValue *key) { TValue *luaH_newkey (lua_State *L, Table *t, const TValue *key) {
Node *mp = mainposition(t, key); Node *mp;
if (!ttisnil(gval(mp)) || mp == dummynode) { if (ttisnil(key)) luaG_runerror(L, "table index is nil");
else if (ttisnumber(key) && luai_numisnan(L, nvalue(key)))
luaG_runerror(L, "table index is NaN");
mp = mainposition(t, key);
if (!ttisnil(gval(mp)) || isdummy(mp)) { /* main position is taken? */
Node *othern; Node *othern;
Node *n = getfreepos(t); /* get a free place */ Node *n = getfreepos(t); /* get a free place */
if (n == NULL) { /* cannot find a free place? */ if (n == NULL) { /* cannot find a free place? */
rehash(L, t, key); /* grow table */ rehash(L, t, key); /* grow table */
return luaH_set(L, t, key); /* re-insert key into grown table */ /* whatever called 'newkey' take care of TM cache and GC barrier */
return luaH_set(L, t, key); /* insert key into grown table */
} }
lua_assert(n != dummynode); lua_assert(!isdummy(n));
othern = mainposition(t, key2tval(mp)); othern = mainposition(t, gkey(mp));
if (othern != mp) { /* is colliding node out of its main position? */ if (othern != mp) { /* is colliding node out of its main position? */
/* yes; move colliding node into free position */ /* yes; move colliding node into free position */
while (gnext(othern) != mp) othern = gnext(othern); /* find previous */ while (gnext(othern) != mp) othern = gnext(othern); /* find previous */
@ -422,8 +439,8 @@ static TValue *newkey (lua_State *L, Table *t, const TValue *key) {
mp = n; mp = n;
} }
} }
gkey(mp)->value = key->value; gkey(mp)->tt = key->tt; setobj2t(L, gkey(mp), key);
luaC_barriert(L, t, key); luaC_barrierback(L, obj2gco(t), key);
lua_assert(ttisnil(gval(mp))); lua_assert(ttisnil(gval(mp)));
return gval(mp); return gval(mp);
} }
@ -432,7 +449,7 @@ static TValue *newkey (lua_State *L, Table *t, const TValue *key) {
/* /*
** search function for integers ** search function for integers
*/ */
const TValue *luaH_getnum (Table *t, int key) { const TValue *luaH_getint (Table *t, int key) {
/* (1 <= key && key <= t->sizearray) */ /* (1 <= key && key <= t->sizearray) */
if (cast(unsigned int, key-1) < cast(unsigned int, t->sizearray)) if (cast(unsigned int, key-1) < cast(unsigned int, t->sizearray))
return &t->array[key-1]; return &t->array[key-1];
@ -450,12 +467,13 @@ const TValue *luaH_getnum (Table *t, int key) {
/* /*
** search function for strings ** search function for short strings
*/ */
const TValue *luaH_getstr (Table *t, TString *key) { const TValue *luaH_getstr (Table *t, TString *key) {
Node *n = hashstr(t, key); Node *n = hashstr(t, key);
lua_assert(key->tsv.tt == LUA_TSHRSTR);
do { /* check whether `key' is somewhere in the chain */ do { /* check whether `key' is somewhere in the chain */
if (ttisstring(gkey(n)) && rawtsvalue(gkey(n)) == key) if (ttisshrstring(gkey(n)) && eqshrstr(rawtsvalue(gkey(n)), key))
return gval(n); /* that's it */ return gval(n); /* that's it */
else n = gnext(n); else n = gnext(n);
} while (n); } while (n);
@ -468,20 +486,20 @@ const TValue *luaH_getstr (Table *t, TString *key) {
*/ */
const TValue *luaH_get (Table *t, const TValue *key) { const TValue *luaH_get (Table *t, const TValue *key) {
switch (ttype(key)) { switch (ttype(key)) {
case LUA_TSHRSTR: return luaH_getstr(t, rawtsvalue(key));
case LUA_TNIL: return luaO_nilobject; case LUA_TNIL: return luaO_nilobject;
case LUA_TSTRING: return luaH_getstr(t, rawtsvalue(key));
case LUA_TNUMBER: { case LUA_TNUMBER: {
int k; int k;
lua_Number n = nvalue(key); lua_Number n = nvalue(key);
lua_number2int(k, n); lua_number2int(k, n);
if (luai_numeq(cast_num(k), nvalue(key))) /* index is int? */ if (luai_numeq(cast_num(k), n)) /* index is int? */
return luaH_getnum(t, k); /* use specialized version */ return luaH_getint(t, k); /* use specialized version */
/* else go through */ /* else go through */
} }
default: { default: {
Node *n = mainposition(t, key); Node *n = mainposition(t, key);
do { /* check whether `key' is somewhere in the chain */ do { /* check whether `key' is somewhere in the chain */
if (luaO_rawequalObj(key2tval(n), key)) if (luaV_rawequalobj(gkey(n), key))
return gval(n); /* that's it */ return gval(n); /* that's it */
else n = gnext(n); else n = gnext(n);
} while (n); } while (n);
@ -491,41 +509,29 @@ const TValue *luaH_get (Table *t, const TValue *key) {
} }
/*
** beware: when using this function you probably need to check a GC
** barrier and invalidate the TM cache.
*/
TValue *luaH_set (lua_State *L, Table *t, const TValue *key) { TValue *luaH_set (lua_State *L, Table *t, const TValue *key) {
const TValue *p = luaH_get(t, key); const TValue *p = luaH_get(t, key);
t->flags = 0;
if (p != luaO_nilobject) if (p != luaO_nilobject)
return cast(TValue *, p); return cast(TValue *, p);
else { else return luaH_newkey(L, t, key);
if (ttisnil(key)) luaG_runerror(L, "table index is nil");
else if (ttisnumber(key) && luai_numisnan(nvalue(key)))
luaG_runerror(L, "table index is NaN");
return newkey(L, t, key);
}
} }
TValue *luaH_setnum (lua_State *L, Table *t, int key) { void luaH_setint (lua_State *L, Table *t, int key, TValue *value) {
const TValue *p = luaH_getnum(t, key); const TValue *p = luaH_getint(t, key);
TValue *cell;
if (p != luaO_nilobject) if (p != luaO_nilobject)
return cast(TValue *, p); cell = cast(TValue *, p);
else { else {
TValue k; TValue k;
setnvalue(&k, cast_num(key)); setnvalue(&k, cast_num(key));
return newkey(L, t, &k); cell = luaH_newkey(L, t, &k);
}
}
TValue *luaH_setstr (lua_State *L, Table *t, TString *key) {
const TValue *p = luaH_getstr(t, key);
if (p != luaO_nilobject)
return cast(TValue *, p);
else {
TValue k;
setsvalue(L, &k, key);
return newkey(L, t, &k);
} }
setobj2t(L, cell, value);
} }
@ -533,20 +539,20 @@ static int unbound_search (Table *t, unsigned int j) {
unsigned int i = j; /* i is zero or a present index */ unsigned int i = j; /* i is zero or a present index */
j++; j++;
/* find `i' and `j' such that i is present and j is not */ /* find `i' and `j' such that i is present and j is not */
while (!ttisnil(luaH_getnum(t, j))) { while (!ttisnil(luaH_getint(t, j))) {
i = j; i = j;
j *= 2; j *= 2;
if (j > cast(unsigned int, MAX_INT)) { /* overflow? */ if (j > cast(unsigned int, MAX_INT)) { /* overflow? */
/* table was built with bad purposes: resort to linear search */ /* table was built with bad purposes: resort to linear search */
i = 1; i = 1;
while (!ttisnil(luaH_getnum(t, i))) i++; while (!ttisnil(luaH_getint(t, i))) i++;
return i - 1; return i - 1;
} }
} }
/* now do a binary search between them */ /* now do a binary search between them */
while (j - i > 1) { while (j - i > 1) {
unsigned int m = (i+j)/2; unsigned int m = (i+j)/2;
if (ttisnil(luaH_getnum(t, m))) j = m; if (ttisnil(luaH_getint(t, m))) j = m;
else i = m; else i = m;
} }
return i; return i;
@ -570,7 +576,7 @@ int luaH_getn (Table *t) {
return i; return i;
} }
/* else must find a boundary in hash part */ /* else must find a boundary in hash part */
else if (t->node == dummynode) /* hash part is empty? */ else if (isdummy(t->node)) /* hash part is empty? */
return j; /* that is easy... */ return j; /* that is easy... */
else return unbound_search(t, j); else return unbound_search(t, j);
} }
@ -583,6 +589,6 @@ Node *luaH_mainposition (const Table *t, const TValue *key) {
return mainposition(t, key); return mainposition(t, key);
} }
int luaH_isdummy (Node *n) { return n == dummynode; } int luaH_isdummy (Node *n) { return isdummy(n); }
#endif #endif

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: ltable.h,v 2.16.1.2 2013/08/30 15:49:41 roberto Exp $
** Lua tables (hash) ** Lua tables (hash)
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -11,20 +11,25 @@
#define gnode(t,i) (&(t)->node[i]) #define gnode(t,i) (&(t)->node[i])
#define gkey(n) (&(n)->i_key.nk) #define gkey(n) (&(n)->i_key.tvk)
#define gval(n) (&(n)->i_val) #define gval(n) (&(n)->i_val)
#define gnext(n) ((n)->i_key.nk.next) #define gnext(n) ((n)->i_key.nk.next)
#define key2tval(n) (&(n)->i_key.tvk) #define invalidateTMcache(t) ((t)->flags = 0)
/* returns the key, given the value of a table entry */
#define keyfromval(v) \
(gkey(cast(Node *, cast(char *, (v)) - offsetof(Node, i_val))))
LUAI_FUNC const TValue *luaH_getnum (Table *t, int key); LUAI_FUNC const TValue *luaH_getint (Table *t, int key);
LUAI_FUNC TValue *luaH_setnum (lua_State *L, Table *t, int key); LUAI_FUNC void luaH_setint (lua_State *L, Table *t, int key, TValue *value);
LUAI_FUNC const TValue *luaH_getstr (Table *t, TString *key); LUAI_FUNC const TValue *luaH_getstr (Table *t, TString *key);
LUAI_FUNC TValue *luaH_setstr (lua_State *L, Table *t, TString *key);
LUAI_FUNC const TValue *luaH_get (Table *t, const TValue *key); LUAI_FUNC const TValue *luaH_get (Table *t, const TValue *key);
LUAI_FUNC TValue *luaH_newkey (lua_State *L, Table *t, const TValue *key);
LUAI_FUNC TValue *luaH_set (lua_State *L, Table *t, const TValue *key); LUAI_FUNC TValue *luaH_set (lua_State *L, Table *t, const TValue *key);
LUAI_FUNC Table *luaH_new (lua_State *L, int narray, int lnhash); LUAI_FUNC Table *luaH_new (lua_State *L);
LUAI_FUNC void luaH_resize (lua_State *L, Table *t, int nasize, int nhsize);
LUAI_FUNC void luaH_resizearray (lua_State *L, Table *t, int nasize); LUAI_FUNC void luaH_resizearray (lua_State *L, Table *t, int nasize);
LUAI_FUNC void luaH_free (lua_State *L, Table *t); LUAI_FUNC void luaH_free (lua_State *L, Table *t);
LUAI_FUNC int luaH_next (lua_State *L, Table *t, StkId key); LUAI_FUNC int luaH_next (lua_State *L, Table *t, StkId key);

View file

@ -1,5 +1,5 @@
/* /*
** $Id: ltablib.c,v 1.38.1.3 2008/02/14 16:46:58 roberto Exp $ ** $Id: ltablib.c,v 1.65.1.1 2013/04/12 18:48:47 roberto Exp $
** Library for Table Manipulation ** Library for Table Manipulation
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -16,43 +16,11 @@
#include "lualib.h" #include "lualib.h"
#define aux_getn(L,n) (luaL_checktype(L, n, LUA_TTABLE), luaL_getn(L, n)) #define aux_getn(L,n) (luaL_checktype(L, n, LUA_TTABLE), luaL_len(L, n))
static int foreachi (lua_State *L) {
int i;
int n = aux_getn(L, 1);
luaL_checktype(L, 2, LUA_TFUNCTION);
for (i=1; i <= n; i++) {
lua_pushvalue(L, 2); /* function */
lua_pushinteger(L, i); /* 1st argument */
lua_rawgeti(L, 1, i); /* 2nd argument */
lua_call(L, 2, 1);
if (!lua_isnil(L, -1))
return 1;
lua_pop(L, 1); /* remove nil result */
}
return 0;
}
static int foreach (lua_State *L) {
luaL_checktype(L, 1, LUA_TTABLE);
luaL_checktype(L, 2, LUA_TFUNCTION);
lua_pushnil(L); /* first key */
while (lua_next(L, 1)) {
lua_pushvalue(L, 2); /* function */
lua_pushvalue(L, -3); /* key */
lua_pushvalue(L, -3); /* value */
lua_call(L, 2, 1);
if (!lua_isnil(L, -1))
return 1;
lua_pop(L, 2); /* remove value and result */
}
return 0;
}
#if defined(LUA_COMPAT_MAXN)
static int maxn (lua_State *L) { static int maxn (lua_State *L) {
lua_Number max = 0; lua_Number max = 0;
luaL_checktype(L, 1, LUA_TTABLE); luaL_checktype(L, 1, LUA_TTABLE);
@ -67,24 +35,7 @@ static int maxn (lua_State *L) {
lua_pushnumber(L, max); lua_pushnumber(L, max);
return 1; return 1;
} }
static int getn (lua_State *L) {
lua_pushinteger(L, aux_getn(L, 1));
return 1;
}
static int setn (lua_State *L) {
luaL_checktype(L, 1, LUA_TTABLE);
#ifndef luaL_setn
luaL_setn(L, 1, luaL_checkint(L, 2));
#else
luaL_error(L, LUA_QL("setn") " is obsolete");
#endif #endif
lua_pushvalue(L, 1);
return 1;
}
static int tinsert (lua_State *L) { static int tinsert (lua_State *L) {
@ -98,7 +49,7 @@ static int tinsert (lua_State *L) {
case 3: { case 3: {
int i; int i;
pos = luaL_checkint(L, 2); /* 2nd argument is the position */ pos = luaL_checkint(L, 2); /* 2nd argument is the position */
if (pos > e) e = pos; /* `grow' array if necessary */ luaL_argcheck(L, 1 <= pos && pos <= e, 2, "position out of bounds");
for (i = e; i > pos; i--) { /* move up elements */ for (i = e; i > pos; i--) { /* move up elements */
lua_rawgeti(L, 1, i-1); lua_rawgeti(L, 1, i-1);
lua_rawseti(L, 1, i); /* t[i] = t[i-1] */ lua_rawseti(L, 1, i); /* t[i] = t[i-1] */
@ -109,25 +60,23 @@ static int tinsert (lua_State *L) {
return luaL_error(L, "wrong number of arguments to " LUA_QL("insert")); return luaL_error(L, "wrong number of arguments to " LUA_QL("insert"));
} }
} }
luaL_setn(L, 1, e); /* new size */
lua_rawseti(L, 1, pos); /* t[pos] = v */ lua_rawseti(L, 1, pos); /* t[pos] = v */
return 0; return 0;
} }
static int tremove (lua_State *L) { static int tremove (lua_State *L) {
int e = aux_getn(L, 1); int size = aux_getn(L, 1);
int pos = luaL_optint(L, 2, e); int pos = luaL_optint(L, 2, size);
if (!(1 <= pos && pos <= e)) /* position is outside bounds? */ if (pos != size) /* validate 'pos' if given */
return 0; /* nothing to remove */ luaL_argcheck(L, 1 <= pos && pos <= size + 1, 1, "position out of bounds");
luaL_setn(L, 1, e - 1); /* t.n = n-1 */
lua_rawgeti(L, 1, pos); /* result = t[pos] */ lua_rawgeti(L, 1, pos); /* result = t[pos] */
for ( ;pos<e; pos++) { for ( ; pos < size; pos++) {
lua_rawgeti(L, 1, pos+1); lua_rawgeti(L, 1, pos+1);
lua_rawseti(L, 1, pos); /* t[pos] = t[pos+1] */ lua_rawseti(L, 1, pos); /* t[pos] = t[pos+1] */
} }
lua_pushnil(L); lua_pushnil(L);
lua_rawseti(L, 1, e); /* t[e] = nil */ lua_rawseti(L, 1, pos); /* t[pos] = nil */
return 1; return 1;
} }
@ -137,7 +86,7 @@ static void addfield (lua_State *L, luaL_Buffer *b, int i) {
if (!lua_isstring(L, -1)) if (!lua_isstring(L, -1))
luaL_error(L, "invalid value (%s) at index %d in table for " luaL_error(L, "invalid value (%s) at index %d in table for "
LUA_QL("concat"), luaL_typename(L, -1), i); LUA_QL("concat"), luaL_typename(L, -1), i);
luaL_addvalue(b); luaL_addvalue(b);
} }
@ -148,7 +97,7 @@ static int tconcat (lua_State *L) {
const char *sep = luaL_optlstring(L, 2, "", &lsep); const char *sep = luaL_optlstring(L, 2, "", &lsep);
luaL_checktype(L, 1, LUA_TTABLE); luaL_checktype(L, 1, LUA_TTABLE);
i = luaL_optint(L, 3, 1); i = luaL_optint(L, 3, 1);
last = luaL_opt(L, luaL_checkint, 4, luaL_getn(L, 1)); last = luaL_opt(L, luaL_checkint, 4, luaL_len(L, 1));
luaL_buffinit(L, &b); luaL_buffinit(L, &b);
for (; i < last; i++) { for (; i < last; i++) {
addfield(L, &b, i); addfield(L, &b, i);
@ -161,12 +110,54 @@ static int tconcat (lua_State *L) {
} }
/*
** {======================================================
** Pack/unpack
** =======================================================
*/
static int pack (lua_State *L) {
int n = lua_gettop(L); /* number of elements to pack */
lua_createtable(L, n, 1); /* create result table */
lua_pushinteger(L, n);
lua_setfield(L, -2, "n"); /* t.n = number of elements */
if (n > 0) { /* at least one element? */
int i;
lua_pushvalue(L, 1);
lua_rawseti(L, -2, 1); /* insert first element */
lua_replace(L, 1); /* move table into index 1 */
for (i = n; i >= 2; i--) /* assign other elements */
lua_rawseti(L, 1, i);
}
return 1; /* return table */
}
static int unpack (lua_State *L) {
int i, e, n;
luaL_checktype(L, 1, LUA_TTABLE);
i = luaL_optint(L, 2, 1);
e = luaL_opt(L, luaL_checkint, 3, luaL_len(L, 1));
if (i > e) return 0; /* empty range */
n = e - i + 1; /* number of elements */
if (n <= 0 || !lua_checkstack(L, n)) /* n <= 0 means arith. overflow */
return luaL_error(L, "too many results to unpack");
lua_rawgeti(L, 1, i); /* push arg[i] (avoiding overflow problems) */
while (i++ < e) /* push arg[i + 1...e] */
lua_rawgeti(L, 1, i);
return n;
}
/* }====================================================== */
/* /*
** {====================================================== ** {======================================================
** Quicksort ** Quicksort
** (based on `Algorithms in MODULA-3', Robert Sedgewick; ** (based on `Algorithms in MODULA-3', Robert Sedgewick;
** Addison-Wesley, 1993.) ** Addison-Wesley, 1993.)
** =======================================================
*/ */
@ -187,7 +178,7 @@ static int sort_comp (lua_State *L, int a, int b) {
return res; return res;
} }
else /* a < b? */ else /* a < b? */
return lua_lessthan(L, a, b); return lua_compare(L, a, b, LUA_OPLT);
} }
static void auxsort (lua_State *L, int l, int u) { static void auxsort (lua_State *L, int l, int u) {
@ -224,12 +215,12 @@ static void auxsort (lua_State *L, int l, int u) {
for (;;) { /* invariant: a[l..i] <= P <= a[j..u] */ for (;;) { /* invariant: a[l..i] <= P <= a[j..u] */
/* repeat ++i until a[i] >= P */ /* repeat ++i until a[i] >= P */
while (lua_rawgeti(L, 1, ++i), sort_comp(L, -1, -2)) { while (lua_rawgeti(L, 1, ++i), sort_comp(L, -1, -2)) {
if (i>u) luaL_error(L, "invalid order function for sorting"); if (i>=u) luaL_error(L, "invalid order function for sorting");
lua_pop(L, 1); /* remove a[i] */ lua_pop(L, 1); /* remove a[i] */
} }
/* repeat --j until a[j] <= P */ /* repeat --j until a[j] <= P */
while (lua_rawgeti(L, 1, --j), sort_comp(L, -3, -1)) { while (lua_rawgeti(L, 1, --j), sort_comp(L, -3, -1)) {
if (j<l) luaL_error(L, "invalid order function for sorting"); if (j<=l) luaL_error(L, "invalid order function for sorting");
lua_pop(L, 1); /* remove a[j] */ lua_pop(L, 1); /* remove a[j] */
} }
if (j<i) { if (j<i) {
@ -268,20 +259,25 @@ static int sort (lua_State *L) {
static const luaL_Reg tab_funcs[] = { static const luaL_Reg tab_funcs[] = {
{"concat", tconcat}, {"concat", tconcat},
{"foreach", foreach}, #if defined(LUA_COMPAT_MAXN)
{"foreachi", foreachi},
{"getn", getn},
{"maxn", maxn}, {"maxn", maxn},
#endif
{"insert", tinsert}, {"insert", tinsert},
{"pack", pack},
{"unpack", unpack},
{"remove", tremove}, {"remove", tremove},
{"setn", setn},
{"sort", sort}, {"sort", sort},
{NULL, NULL} {NULL, NULL}
}; };
LUALIB_API int luaopen_table (lua_State *L) { LUAMOD_API int luaopen_table (lua_State *L) {
luaL_register(L, LUA_TABLIBNAME, tab_funcs); luaL_newlib(L, tab_funcs);
#if defined(LUA_COMPAT_UNPACK)
/* _G.unpack = table.unpack */
lua_getfield(L, -1, "unpack");
lua_setglobal(L, "unpack");
#endif
return 1; return 1;
} }

View file

@ -1,5 +1,5 @@
/* /*
** $Id: ltm.c,v 2.8.1.1 2007/12/27 13:02:25 roberto Exp $ ** $Id: ltm.c,v 2.14.1.1 2013/04/12 18:48:47 roberto Exp $
** Tag methods ** Tag methods
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -19,20 +19,22 @@
#include "ltm.h" #include "ltm.h"
static const char udatatypename[] = "userdata";
const char *const luaT_typenames[] = { LUAI_DDEF const char *const luaT_typenames_[LUA_TOTALTAGS] = {
"nil", "boolean", "userdata", "number", "no value",
"string", "table", "function", "userdata", "thread", "nil", "boolean", udatatypename, "number",
"proto", "upval" "string", "table", "function", udatatypename, "thread",
"proto", "upval" /* these last two cases are used for tests only */
}; };
void luaT_init (lua_State *L) { void luaT_init (lua_State *L) {
static const char *const luaT_eventname[] = { /* ORDER TM */ static const char *const luaT_eventname[] = { /* ORDER TM */
"__index", "__newindex", "__index", "__newindex",
"__gc", "__mode", "__eq", "__gc", "__mode", "__len", "__eq",
"__add", "__sub", "__mul", "__div", "__mod", "__add", "__sub", "__mul", "__div", "__mod",
"__pow", "__unm", "__len", "__lt", "__le", "__pow", "__unm", "__lt", "__le",
"__concat", "__call" "__concat", "__call"
}; };
int i; int i;
@ -60,7 +62,7 @@ const TValue *luaT_gettm (Table *events, TMS event, TString *ename) {
const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o, TMS event) { const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o, TMS event) {
Table *mt; Table *mt;
switch (ttype(o)) { switch (ttypenv(o)) {
case LUA_TTABLE: case LUA_TTABLE:
mt = hvalue(o)->metatable; mt = hvalue(o)->metatable;
break; break;
@ -68,7 +70,7 @@ const TValue *luaT_gettmbyobj (lua_State *L, const TValue *o, TMS event) {
mt = uvalue(o)->metatable; mt = uvalue(o)->metatable;
break; break;
default: default:
mt = G(L)->mt[ttype(o)]; mt = G(L)->mt[ttypenv(o)];
} }
return (mt ? luaH_getstr(mt, G(L)->tmname[event]) : luaO_nilobject); return (mt ? luaH_getstr(mt, G(L)->tmname[event]) : luaO_nilobject);
} }

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: ltm.h,v 2.11.1.1 2013/04/12 18:48:47 roberto Exp $
** Tag methods ** Tag methods
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -20,6 +20,7 @@ typedef enum {
TM_NEWINDEX, TM_NEWINDEX,
TM_GC, TM_GC,
TM_MODE, TM_MODE,
TM_LEN,
TM_EQ, /* last tag method with `fast' access */ TM_EQ, /* last tag method with `fast' access */
TM_ADD, TM_ADD,
TM_SUB, TM_SUB,
@ -28,7 +29,6 @@ typedef enum {
TM_MOD, TM_MOD,
TM_POW, TM_POW,
TM_UNM, TM_UNM,
TM_LEN,
TM_LT, TM_LT,
TM_LE, TM_LE,
TM_CONCAT, TM_CONCAT,
@ -43,7 +43,10 @@ typedef enum {
#define fasttm(l,et,e) gfasttm(G(l), et, e) #define fasttm(l,et,e) gfasttm(G(l), et, e)
LUAI_DATA const char *const luaT_typenames[]; #define ttypename(x) luaT_typenames_[(x) + 1]
#define objtypename(x) ttypename(ttypenv(x))
LUAI_DDEC const char *const luaT_typenames_[LUA_TOTALTAGS];
LUAI_FUNC const TValue *luaT_gettm (Table *events, TMS event, TString *ename); LUAI_FUNC const TValue *luaT_gettm (Table *events, TMS event, TString *ename);

View file

@ -1,6 +1,6 @@
/* /*
** $Id$ ** $Id: lua.h,v 1.285.1.2 2013/11/11 12:09:16 roberto Exp $
** Lua - An Extensible Extension Language ** Lua - A Scripting Language
** Lua.org, PUC-Rio, Brazil (http://www.lua.org) ** Lua.org, PUC-Rio, Brazil (http://www.lua.org)
** See Copyright Notice at the end of this file ** See Copyright Notice at the end of this file
*/ */
@ -16,35 +16,39 @@
#include "luaconf.h" #include "luaconf.h"
#define LUA_VERSION "Lua 5.1" #define LUA_VERSION_MAJOR "5"
#define LUA_RELEASE "Lua 5.1.4" #define LUA_VERSION_MINOR "2"
#define LUA_VERSION_NUM 501 #define LUA_VERSION_NUM 502
#define LUA_COPYRIGHT "Copyright (C) 1994-2008 Lua.org, PUC-Rio" #define LUA_VERSION_RELEASE "3"
#define LUA_AUTHORS "R. Ierusalimschy, L. H. de Figueiredo & W. Celes"
#define LUA_VERSION "Lua " LUA_VERSION_MAJOR "." LUA_VERSION_MINOR
#define LUA_RELEASE LUA_VERSION "." LUA_VERSION_RELEASE
#define LUA_COPYRIGHT LUA_RELEASE " Copyright (C) 1994-2013 Lua.org, PUC-Rio"
#define LUA_AUTHORS "R. Ierusalimschy, L. H. de Figueiredo, W. Celes"
/* mark for precompiled code (`<esc>Lua') */ /* mark for precompiled code ('<esc>Lua') */
#define LUA_SIGNATURE "\033Lua" #define LUA_SIGNATURE "\033Lua"
/* option for multiple returns in `lua_pcall' and `lua_call' */ /* option for multiple returns in 'lua_pcall' and 'lua_call' */
#define LUA_MULTRET (-1) #define LUA_MULTRET (-1)
/* /*
** pseudo-indices ** pseudo-indices
*/ */
#define LUA_REGISTRYINDEX (-10000) #define LUA_REGISTRYINDEX LUAI_FIRSTPSEUDOIDX
#define LUA_ENVIRONINDEX (-10001) #define lua_upvalueindex(i) (LUA_REGISTRYINDEX - (i))
#define LUA_GLOBALSINDEX (-10002)
#define lua_upvalueindex(i) (LUA_GLOBALSINDEX-(i))
/* thread status; 0 is OK */ /* thread status */
#define LUA_OK 0
#define LUA_YIELD 1 #define LUA_YIELD 1
#define LUA_ERRRUN 2 #define LUA_ERRRUN 2
#define LUA_ERRSYNTAX 3 #define LUA_ERRSYNTAX 3
#define LUA_ERRMEM 4 #define LUA_ERRMEM 4
#define LUA_ERRERR 5 #define LUA_ERRGCMM 5
#define LUA_ERRERR 6
typedef struct lua_State lua_State; typedef struct lua_State lua_State;
@ -81,12 +85,32 @@ typedef void * (*lua_Alloc) (void *ud, void *ptr, size_t osize, size_t nsize);
#define LUA_TUSERDATA 7 #define LUA_TUSERDATA 7
#define LUA_TTHREAD 8 #define LUA_TTHREAD 8
#define LUA_NUMTAGS 9
/* minimum Lua stack available to a C function */ /* minimum Lua stack available to a C function */
#define LUA_MINSTACK 20 #define LUA_MINSTACK 20
/* predefined values in the registry */
#define LUA_RIDX_MAINTHREAD 1
#define LUA_RIDX_GLOBALS 2
#define LUA_RIDX_LAST LUA_RIDX_GLOBALS
/* type of numbers in Lua */
typedef LUA_NUMBER lua_Number;
/* type for integer functions */
typedef LUA_INTEGER lua_Integer;
/* unsigned integer type */
typedef LUA_UNSIGNED lua_Unsigned;
/* /*
** generic extra include file ** generic extra include file
*/ */
@ -95,13 +119,10 @@ typedef void * (*lua_Alloc) (void *ud, void *ptr, size_t osize, size_t nsize);
#endif #endif
/* type of numbers in Lua */ /*
typedef LUA_NUMBER lua_Number; ** RCS ident string
*/
extern const char lua_ident[];
/* type for integer functions */
typedef LUA_INTEGER lua_Integer;
/* /*
@ -114,15 +135,20 @@ LUA_API lua_State *(lua_newthread) (lua_State *L);
LUA_API lua_CFunction (lua_atpanic) (lua_State *L, lua_CFunction panicf); LUA_API lua_CFunction (lua_atpanic) (lua_State *L, lua_CFunction panicf);
LUA_API const lua_Number *(lua_version) (lua_State *L);
/* /*
** basic stack manipulation ** basic stack manipulation
*/ */
LUA_API int (lua_absindex) (lua_State *L, int idx);
LUA_API int (lua_gettop) (lua_State *L); LUA_API int (lua_gettop) (lua_State *L);
LUA_API void (lua_settop) (lua_State *L, int idx); LUA_API void (lua_settop) (lua_State *L, int idx);
LUA_API void (lua_pushvalue) (lua_State *L, int idx); LUA_API void (lua_pushvalue) (lua_State *L, int idx);
LUA_API void (lua_remove) (lua_State *L, int idx); LUA_API void (lua_remove) (lua_State *L, int idx);
LUA_API void (lua_insert) (lua_State *L, int idx); LUA_API void (lua_insert) (lua_State *L, int idx);
LUA_API void (lua_replace) (lua_State *L, int idx); LUA_API void (lua_replace) (lua_State *L, int idx);
LUA_API void (lua_copy) (lua_State *L, int fromidx, int toidx);
LUA_API int (lua_checkstack) (lua_State *L, int sz); LUA_API int (lua_checkstack) (lua_State *L, int sz);
LUA_API void (lua_xmove) (lua_State *from, lua_State *to, int n); LUA_API void (lua_xmove) (lua_State *from, lua_State *to, int n);
@ -139,29 +165,49 @@ LUA_API int (lua_isuserdata) (lua_State *L, int idx);
LUA_API int (lua_type) (lua_State *L, int idx); LUA_API int (lua_type) (lua_State *L, int idx);
LUA_API const char *(lua_typename) (lua_State *L, int tp); LUA_API const char *(lua_typename) (lua_State *L, int tp);
LUA_API int (lua_equal) (lua_State *L, int idx1, int idx2); LUA_API lua_Number (lua_tonumberx) (lua_State *L, int idx, int *isnum);
LUA_API int (lua_rawequal) (lua_State *L, int idx1, int idx2); LUA_API lua_Integer (lua_tointegerx) (lua_State *L, int idx, int *isnum);
LUA_API int (lua_lessthan) (lua_State *L, int idx1, int idx2); LUA_API lua_Unsigned (lua_tounsignedx) (lua_State *L, int idx, int *isnum);
LUA_API lua_Number (lua_tonumber) (lua_State *L, int idx);
LUA_API lua_Integer (lua_tointeger) (lua_State *L, int idx);
LUA_API int (lua_toboolean) (lua_State *L, int idx); LUA_API int (lua_toboolean) (lua_State *L, int idx);
LUA_API const char *(lua_tolstring) (lua_State *L, int idx, size_t *len); LUA_API const char *(lua_tolstring) (lua_State *L, int idx, size_t *len);
LUA_API size_t (lua_objlen) (lua_State *L, int idx); LUA_API size_t (lua_rawlen) (lua_State *L, int idx);
LUA_API lua_CFunction (lua_tocfunction) (lua_State *L, int idx); LUA_API lua_CFunction (lua_tocfunction) (lua_State *L, int idx);
LUA_API void *(lua_touserdata) (lua_State *L, int idx); LUA_API void *(lua_touserdata) (lua_State *L, int idx);
LUA_API lua_State *(lua_tothread) (lua_State *L, int idx); LUA_API lua_State *(lua_tothread) (lua_State *L, int idx);
LUA_API const void *(lua_topointer) (lua_State *L, int idx); LUA_API const void *(lua_topointer) (lua_State *L, int idx);
/*
** Comparison and arithmetic functions
*/
#define LUA_OPADD 0 /* ORDER TM */
#define LUA_OPSUB 1
#define LUA_OPMUL 2
#define LUA_OPDIV 3
#define LUA_OPMOD 4
#define LUA_OPPOW 5
#define LUA_OPUNM 6
LUA_API void (lua_arith) (lua_State *L, int op);
#define LUA_OPEQ 0
#define LUA_OPLT 1
#define LUA_OPLE 2
LUA_API int (lua_rawequal) (lua_State *L, int idx1, int idx2);
LUA_API int (lua_compare) (lua_State *L, int idx1, int idx2, int op);
/* /*
** push functions (C -> stack) ** push functions (C -> stack)
*/ */
LUA_API void (lua_pushnil) (lua_State *L); LUA_API void (lua_pushnil) (lua_State *L);
LUA_API void (lua_pushnumber) (lua_State *L, lua_Number n); LUA_API void (lua_pushnumber) (lua_State *L, lua_Number n);
LUA_API void (lua_pushinteger) (lua_State *L, lua_Integer n); LUA_API void (lua_pushinteger) (lua_State *L, lua_Integer n);
LUA_API void (lua_pushlstring) (lua_State *L, const char *s, size_t l); LUA_API void (lua_pushunsigned) (lua_State *L, lua_Unsigned n);
LUA_API void (lua_pushstring) (lua_State *L, const char *s); LUA_API const char *(lua_pushlstring) (lua_State *L, const char *s, size_t l);
LUA_API const char *(lua_pushstring) (lua_State *L, const char *s);
LUA_API const char *(lua_pushvfstring) (lua_State *L, const char *fmt, LUA_API const char *(lua_pushvfstring) (lua_State *L, const char *fmt,
va_list argp); va_list argp);
LUA_API const char *(lua_pushfstring) (lua_State *L, const char *fmt, ...); LUA_API const char *(lua_pushfstring) (lua_State *L, const char *fmt, ...);
@ -174,35 +220,47 @@ LUA_API int (lua_pushthread) (lua_State *L);
/* /*
** get functions (Lua -> stack) ** get functions (Lua -> stack)
*/ */
LUA_API void (lua_getglobal) (lua_State *L, const char *var);
LUA_API void (lua_gettable) (lua_State *L, int idx); LUA_API void (lua_gettable) (lua_State *L, int idx);
LUA_API void (lua_getfield) (lua_State *L, int idx, const char *k); LUA_API void (lua_getfield) (lua_State *L, int idx, const char *k);
LUA_API void (lua_rawget) (lua_State *L, int idx); LUA_API void (lua_rawget) (lua_State *L, int idx);
LUA_API void (lua_rawgeti) (lua_State *L, int idx, int n); LUA_API void (lua_rawgeti) (lua_State *L, int idx, int n);
LUA_API void (lua_rawgetp) (lua_State *L, int idx, const void *p);
LUA_API void (lua_createtable) (lua_State *L, int narr, int nrec); LUA_API void (lua_createtable) (lua_State *L, int narr, int nrec);
LUA_API void *(lua_newuserdata) (lua_State *L, size_t sz); LUA_API void *(lua_newuserdata) (lua_State *L, size_t sz);
LUA_API int (lua_getmetatable) (lua_State *L, int objindex); LUA_API int (lua_getmetatable) (lua_State *L, int objindex);
LUA_API void (lua_getfenv) (lua_State *L, int idx); LUA_API void (lua_getuservalue) (lua_State *L, int idx);
/* /*
** set functions (stack -> Lua) ** set functions (stack -> Lua)
*/ */
LUA_API void (lua_setglobal) (lua_State *L, const char *var);
LUA_API void (lua_settable) (lua_State *L, int idx); LUA_API void (lua_settable) (lua_State *L, int idx);
LUA_API void (lua_setfield) (lua_State *L, int idx, const char *k); LUA_API void (lua_setfield) (lua_State *L, int idx, const char *k);
LUA_API void (lua_rawset) (lua_State *L, int idx); LUA_API void (lua_rawset) (lua_State *L, int idx);
LUA_API void (lua_rawseti) (lua_State *L, int idx, int n); LUA_API void (lua_rawseti) (lua_State *L, int idx, int n);
LUA_API void (lua_rawsetp) (lua_State *L, int idx, const void *p);
LUA_API int (lua_setmetatable) (lua_State *L, int objindex); LUA_API int (lua_setmetatable) (lua_State *L, int objindex);
LUA_API int (lua_setfenv) (lua_State *L, int idx); LUA_API void (lua_setuservalue) (lua_State *L, int idx);
/* /*
** `load' and `call' functions (load and run Lua code) ** 'load' and 'call' functions (load and run Lua code)
*/ */
LUA_API void (lua_call) (lua_State *L, int nargs, int nresults); LUA_API void (lua_callk) (lua_State *L, int nargs, int nresults, int ctx,
LUA_API int (lua_pcall) (lua_State *L, int nargs, int nresults, int errfunc); lua_CFunction k);
LUA_API int (lua_cpcall) (lua_State *L, lua_CFunction func, void *ud); #define lua_call(L,n,r) lua_callk(L, (n), (r), 0, NULL)
LUA_API int (lua_getctx) (lua_State *L, int *ctx);
LUA_API int (lua_pcallk) (lua_State *L, int nargs, int nresults, int errfunc,
int ctx, lua_CFunction k);
#define lua_pcall(L,n,r,f) lua_pcallk(L, (n), (r), (f), 0, NULL)
LUA_API int (lua_load) (lua_State *L, lua_Reader reader, void *dt, LUA_API int (lua_load) (lua_State *L, lua_Reader reader, void *dt,
const char *chunkname); const char *chunkname,
const char *mode);
LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data); LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data);
@ -210,8 +268,10 @@ LUA_API int (lua_dump) (lua_State *L, lua_Writer writer, void *data);
/* /*
** coroutine functions ** coroutine functions
*/ */
LUA_API int (lua_yield) (lua_State *L, int nresults); LUA_API int (lua_yieldk) (lua_State *L, int nresults, int ctx,
LUA_API int (lua_resume) (lua_State *L, int narg); lua_CFunction k);
#define lua_yield(L,n) lua_yieldk(L, (n), 0, NULL)
LUA_API int (lua_resume) (lua_State *L, lua_State *from, int narg);
LUA_API int (lua_status) (lua_State *L); LUA_API int (lua_status) (lua_State *L);
/* /*
@ -226,6 +286,10 @@ LUA_API int (lua_status) (lua_State *L);
#define LUA_GCSTEP 5 #define LUA_GCSTEP 5
#define LUA_GCSETPAUSE 6 #define LUA_GCSETPAUSE 6
#define LUA_GCSETSTEPMUL 7 #define LUA_GCSETSTEPMUL 7
#define LUA_GCSETMAJORINC 8
#define LUA_GCISRUNNING 9
#define LUA_GCGEN 10
#define LUA_GCINC 11
LUA_API int (lua_gc) (lua_State *L, int what, int data); LUA_API int (lua_gc) (lua_State *L, int what, int data);
@ -239,18 +303,23 @@ LUA_API int (lua_error) (lua_State *L);
LUA_API int (lua_next) (lua_State *L, int idx); LUA_API int (lua_next) (lua_State *L, int idx);
LUA_API void (lua_concat) (lua_State *L, int n); LUA_API void (lua_concat) (lua_State *L, int n);
LUA_API void (lua_len) (lua_State *L, int idx);
LUA_API lua_Alloc (lua_getallocf) (lua_State *L, void **ud); LUA_API lua_Alloc (lua_getallocf) (lua_State *L, void **ud);
LUA_API void lua_setallocf (lua_State *L, lua_Alloc f, void *ud); LUA_API void (lua_setallocf) (lua_State *L, lua_Alloc f, void *ud);
/* /*
** =============================================================== ** ===============================================================
** some useful macros ** some useful macros
** =============================================================== ** ===============================================================
*/ */
#define lua_tonumber(L,i) lua_tonumberx(L,i,NULL)
#define lua_tointeger(L,i) lua_tointegerx(L,i,NULL)
#define lua_tounsigned(L,i) lua_tounsignedx(L,i,NULL)
#define lua_pop(L,n) lua_settop(L, -(n)-1) #define lua_pop(L,n) lua_settop(L, -(n)-1)
#define lua_newtable(L) lua_createtable(L, 0, 0) #define lua_newtable(L) lua_createtable(L, 0, 0)
@ -259,8 +328,6 @@ LUA_API void lua_setallocf (lua_State *L, lua_Alloc f, void *ud);
#define lua_pushcfunction(L,f) lua_pushcclosure(L, (f), 0) #define lua_pushcfunction(L,f) lua_pushcclosure(L, (f), 0)
#define lua_strlen(L,i) lua_objlen(L, (i))
#define lua_isfunction(L,n) (lua_type(L, (n)) == LUA_TFUNCTION) #define lua_isfunction(L,n) (lua_type(L, (n)) == LUA_TFUNCTION)
#define lua_istable(L,n) (lua_type(L, (n)) == LUA_TTABLE) #define lua_istable(L,n) (lua_type(L, (n)) == LUA_TTABLE)
#define lua_islightuserdata(L,n) (lua_type(L, (n)) == LUA_TLIGHTUSERDATA) #define lua_islightuserdata(L,n) (lua_type(L, (n)) == LUA_TLIGHTUSERDATA)
@ -273,31 +340,13 @@ LUA_API void lua_setallocf (lua_State *L, lua_Alloc f, void *ud);
#define lua_pushliteral(L, s) \ #define lua_pushliteral(L, s) \
lua_pushlstring(L, "" s, (sizeof(s)/sizeof(char))-1) lua_pushlstring(L, "" s, (sizeof(s)/sizeof(char))-1)
#define lua_setglobal(L,s) lua_setfield(L, LUA_GLOBALSINDEX, (s)) #define lua_pushglobaltable(L) \
#define lua_getglobal(L,s) lua_getfield(L, LUA_GLOBALSINDEX, (s)) lua_rawgeti(L, LUA_REGISTRYINDEX, LUA_RIDX_GLOBALS)
#define lua_tostring(L,i) lua_tolstring(L, (i), NULL) #define lua_tostring(L,i) lua_tolstring(L, (i), NULL)
/*
** compatibility macros and functions
*/
#define lua_open() luaL_newstate()
#define lua_getregistry(L) lua_pushvalue(L, LUA_REGISTRYINDEX)
#define lua_getgccount(L) lua_gc(L, LUA_GCCOUNT, 0)
#define lua_Chunkreader lua_Reader
#define lua_Chunkwriter lua_Writer
/* hack */
LUA_API void lua_setlevel (lua_State *from, lua_State *to);
/* /*
** {====================================================================== ** {======================================================================
** Debug API ** Debug API
@ -312,7 +361,7 @@ LUA_API void lua_setlevel (lua_State *from, lua_State *to);
#define LUA_HOOKRET 1 #define LUA_HOOKRET 1
#define LUA_HOOKLINE 2 #define LUA_HOOKLINE 2
#define LUA_HOOKCOUNT 3 #define LUA_HOOKCOUNT 3
#define LUA_HOOKTAILRET 4 #define LUA_HOOKTAILCALL 4
/* /*
@ -326,43 +375,50 @@ LUA_API void lua_setlevel (lua_State *from, lua_State *to);
typedef struct lua_Debug lua_Debug; /* activation record */ typedef struct lua_Debug lua_Debug; /* activation record */
/* Functions to be called by the debuger in specific events */ /* Functions to be called by the debugger in specific events */
typedef void (*lua_Hook) (lua_State *L, lua_Debug *ar); typedef void (*lua_Hook) (lua_State *L, lua_Debug *ar);
LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar); LUA_API int (lua_getstack) (lua_State *L, int level, lua_Debug *ar);
LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar); LUA_API int (lua_getinfo) (lua_State *L, const char *what, lua_Debug *ar);
LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n); LUA_API const char *(lua_getlocal) (lua_State *L, const lua_Debug *ar, int n);
LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n); LUA_API const char *(lua_setlocal) (lua_State *L, const lua_Debug *ar, int n);
LUA_API const char *lua_getupvalue (lua_State *L, int funcindex, int n); LUA_API const char *(lua_getupvalue) (lua_State *L, int funcindex, int n);
LUA_API const char *lua_setupvalue (lua_State *L, int funcindex, int n); LUA_API const char *(lua_setupvalue) (lua_State *L, int funcindex, int n);
LUA_API int lua_sethook (lua_State *L, lua_Hook func, int mask, int count); LUA_API void *(lua_upvalueid) (lua_State *L, int fidx, int n);
LUA_API lua_Hook lua_gethook (lua_State *L); LUA_API void (lua_upvaluejoin) (lua_State *L, int fidx1, int n1,
LUA_API int lua_gethookmask (lua_State *L); int fidx2, int n2);
LUA_API int lua_gethookcount (lua_State *L);
LUA_API int (lua_sethook) (lua_State *L, lua_Hook func, int mask, int count);
LUA_API lua_Hook (lua_gethook) (lua_State *L);
LUA_API int (lua_gethookmask) (lua_State *L);
LUA_API int (lua_gethookcount) (lua_State *L);
struct lua_Debug { struct lua_Debug {
int event; int event;
const char *name; /* (n) */ const char *name; /* (n) */
const char *namewhat; /* (n) `global', `local', `field', `method' */ const char *namewhat; /* (n) 'global', 'local', 'field', 'method' */
const char *what; /* (S) `Lua', `C', `main', `tail' */ const char *what; /* (S) 'Lua', 'C', 'main', 'tail' */
const char *source; /* (S) */ const char *source; /* (S) */
int currentline; /* (l) */ int currentline; /* (l) */
int nups; /* (u) number of upvalues */
int linedefined; /* (S) */ int linedefined; /* (S) */
int lastlinedefined; /* (S) */ int lastlinedefined; /* (S) */
unsigned char nups; /* (u) number of upvalues */
unsigned char nparams;/* (u) number of parameters */
char isvararg; /* (u) */
char istailcall; /* (t) */
char short_src[LUA_IDSIZE]; /* (S) */ char short_src[LUA_IDSIZE]; /* (S) */
/* private part */ /* private part */
int i_ci; /* active function */ struct CallInfo *i_ci; /* active function */
}; };
/* }====================================================================== */ /* }====================================================================== */
/****************************************************************************** /******************************************************************************
* Copyright (C) 1994-2008 Lua.org, PUC-Rio. All rights reserved. * Copyright (C) 1994-2013 Lua.org, PUC-Rio.
* *
* Permission is hereby granted, free of charge, to any person obtaining * Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the * a copy of this software and associated documentation files (the

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: luaconf.h,v 1.176.1.1 2013/04/12 18:48:47 roberto Exp $
** Configuration file for Lua ** Configuration file for Lua
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -24,30 +24,44 @@
** CHANGE it (define it) if you want Lua to avoid the use of any ** CHANGE it (define it) if you want Lua to avoid the use of any
** non-ansi feature or library. ** non-ansi feature or library.
*/ */
#if defined(__STRICT_ANSI__) #if !defined(LUA_ANSI) && defined(__STRICT_ANSI__)
#define LUA_ANSI #define LUA_ANSI
#endif #endif
#if !defined(LUA_ANSI) && defined(_WIN32) #if !defined(LUA_ANSI) && defined(_WIN32) && !defined(_WIN32_WCE)
#define LUA_WIN #define LUA_WIN /* enable goodies for regular Windows platforms */
#endif #endif
#if defined(LUA_WIN)
#define LUA_DL_DLL
#define LUA_USE_AFORMAT /* assume 'printf' handles 'aA' specifiers */
#endif
#if defined(LUA_USE_LINUX) #if defined(LUA_USE_LINUX)
#define LUA_USE_POSIX #define LUA_USE_POSIX
#define LUA_USE_DLOPEN /* needs an extra library: -ldl */ #define LUA_USE_DLOPEN /* needs an extra library: -ldl */
#define LUA_USE_READLINE /* needs some extra libraries */ #define LUA_USE_READLINE /* needs some extra libraries */
#define LUA_USE_STRTODHEX /* assume 'strtod' handles hex formats */
#define LUA_USE_AFORMAT /* assume 'printf' handles 'aA' specifiers */
#define LUA_USE_LONGLONG /* assume support for long long */
#endif #endif
#if defined(LUA_USE_MACOSX) #if defined(LUA_USE_MACOSX)
#define LUA_USE_POSIX #define LUA_USE_POSIX
#define LUA_DL_DYLD /* does not need extra library */ #define LUA_USE_DLOPEN /* does not need -ldl */
#define LUA_USE_READLINE /* needs an extra library: -lreadline */
#define LUA_USE_STRTODHEX /* assume 'strtod' handles hex formats */
#define LUA_USE_AFORMAT /* assume 'printf' handles 'aA' specifiers */
#define LUA_USE_LONGLONG /* assume support for long long */
#endif #endif
/* /*
@@ LUA_USE_POSIX includes all functionallity listed as X/Open System @@ LUA_USE_POSIX includes all functionality listed as X/Open System
@* Interfaces Extension (XSI). @* Interfaces Extension (XSI).
** CHANGE it (define it) if your system is XSI compatible. ** CHANGE it (define it) if your system is XSI compatible.
*/ */
@ -56,20 +70,10 @@
#define LUA_USE_ISATTY #define LUA_USE_ISATTY
#define LUA_USE_POPEN #define LUA_USE_POPEN
#define LUA_USE_ULONGJMP #define LUA_USE_ULONGJMP
#define LUA_USE_GMTIME_R
#endif #endif
/*
@@ LUA_PATH and LUA_CPATH are the names of the environment variables that
@* Lua check to set its paths.
@@ LUA_INIT is the name of the environment variable that Lua
@* checks for initialization code.
** CHANGE them if you want different names.
*/
#define LUA_PATH "LUA_PATH"
#define LUA_CPATH "LUA_CPATH"
#define LUA_INIT "LUA_INIT"
/* /*
@@ LUA_PATH_DEFAULT is the default path that Lua uses to look for @@ LUA_PATH_DEFAULT is the default path that Lua uses to look for
@ -80,7 +84,7 @@
** hierarchy or if you want to install your libraries in ** hierarchy or if you want to install your libraries in
** non-conventional directories. ** non-conventional directories.
*/ */
#if defined(_WIN32) #if defined(_WIN32) /* { */
/* /*
** In Windows, any exclamation mark ('!') in the path is replaced by the ** In Windows, any exclamation mark ('!') in the path is replaced by the
** path of the directory of the executable file of the current process. ** path of the directory of the executable file of the current process.
@ -88,21 +92,23 @@
#define LUA_LDIR "!\\lua\\" #define LUA_LDIR "!\\lua\\"
#define LUA_CDIR "!\\" #define LUA_CDIR "!\\"
#define LUA_PATH_DEFAULT \ #define LUA_PATH_DEFAULT \
".\\?.lua;" LUA_LDIR"?.lua;" LUA_LDIR"?\\init.lua;" \ LUA_LDIR"?.lua;" LUA_LDIR"?\\init.lua;" \
LUA_CDIR"?.lua;" LUA_CDIR"?\\init.lua" LUA_CDIR"?.lua;" LUA_CDIR"?\\init.lua;" ".\\?.lua"
#define LUA_CPATH_DEFAULT \ #define LUA_CPATH_DEFAULT \
".\\?.dll;" LUA_CDIR"?.dll;" LUA_CDIR"loadall.dll" LUA_CDIR"?.dll;" LUA_CDIR"loadall.dll;" ".\\?.dll"
#else #else /* }{ */
#define LUA_VDIR LUA_VERSION_MAJOR "." LUA_VERSION_MINOR "/"
#define LUA_ROOT "/usr/local/" #define LUA_ROOT "/usr/local/"
#define LUA_LDIR LUA_ROOT "share/lua/5.1/" #define LUA_LDIR LUA_ROOT "share/lua/" LUA_VDIR
#define LUA_CDIR LUA_ROOT "lib/lua/5.1/" #define LUA_CDIR LUA_ROOT "lib/lua/" LUA_VDIR
#define LUA_PATH_DEFAULT \ #define LUA_PATH_DEFAULT \
"./?.lua;" LUA_LDIR"?.lua;" LUA_LDIR"?/init.lua;" \ LUA_LDIR"?.lua;" LUA_LDIR"?/init.lua;" \
LUA_CDIR"?.lua;" LUA_CDIR"?/init.lua" LUA_CDIR"?.lua;" LUA_CDIR"?/init.lua;" "./?.lua"
#define LUA_CPATH_DEFAULT \ #define LUA_CPATH_DEFAULT \
"./?.so;" LUA_CDIR"?.so;" LUA_CDIR"loadall.so" LUA_CDIR"?.so;" LUA_CDIR"loadall.so;" "./?.so"
#endif #endif /* } */
/* /*
@ -118,79 +124,67 @@
/* /*
@@ LUA_PATHSEP is the character that separates templates in a path. @@ LUA_ENV is the name of the variable that holds the current
@@ LUA_PATH_MARK is the string that marks the substitution points in a @@ environment, used to access global names.
@* template. ** CHANGE it if you do not like this name.
@@ LUA_EXECDIR in a Windows path is replaced by the executable's
@* directory.
@@ LUA_IGMARK is a mark to ignore all before it when bulding the
@* luaopen_ function name.
** CHANGE them if for some reason your system cannot use those
** characters. (E.g., if one of those characters is a common character
** in file/directory names.) Probably you do not need to change them.
*/ */
#define LUA_PATHSEP ";" #define LUA_ENV "_ENV"
#define LUA_PATH_MARK "?"
#define LUA_EXECDIR "!"
#define LUA_IGMARK "-"
/*
@@ LUA_INTEGER is the integral type used by lua_pushinteger/lua_tointeger.
** CHANGE that if ptrdiff_t is not adequate on your machine. (On most
** machines, ptrdiff_t gives a good choice between int or long.)
*/
#define LUA_INTEGER ptrdiff_t
/* /*
@@ LUA_API is a mark for all core API functions. @@ LUA_API is a mark for all core API functions.
@@ LUALIB_API is a mark for all standard library functions. @@ LUALIB_API is a mark for all auxiliary library functions.
@@ LUAMOD_API is a mark for all standard library opening functions.
** CHANGE them if you need to define those functions in some special way. ** CHANGE them if you need to define those functions in some special way.
** For instance, if you want to create one Windows DLL with the core and ** For instance, if you want to create one Windows DLL with the core and
** the libraries, you may want to use the following definition (define ** the libraries, you may want to use the following definition (define
** LUA_BUILD_AS_DLL to get it). ** LUA_BUILD_AS_DLL to get it).
*/ */
#if defined(LUA_BUILD_AS_DLL) #if defined(LUA_BUILD_AS_DLL) /* { */
#if defined(LUA_CORE) || defined(LUA_LIB) #if defined(LUA_CORE) || defined(LUA_LIB) /* { */
#define LUA_API __declspec(dllexport) #define LUA_API __declspec(dllexport)
#else #else /* }{ */
#define LUA_API __declspec(dllimport) #define LUA_API __declspec(dllimport)
#endif #endif /* } */
#else #else /* }{ */
#define LUA_API extern #define LUA_API extern
#endif #endif /* } */
/* more often than not the libs go together with the core */ /* more often than not the libs go together with the core */
#define LUALIB_API LUA_API #define LUALIB_API LUA_API
#define LUAMOD_API LUALIB_API
/* /*
@@ LUAI_FUNC is a mark for all extern functions that are not to be @@ LUAI_FUNC is a mark for all extern functions that are not to be
@* exported to outside modules. @* exported to outside modules.
@@ LUAI_DATA is a mark for all extern (const) variables that are not to @@ LUAI_DDEF and LUAI_DDEC are marks for all extern (const) variables
@* be exported to outside modules. @* that are not to be exported to outside modules (LUAI_DDEF for
@* definitions and LUAI_DDEC for declarations).
** CHANGE them if you need to mark them in some special way. Elf/gcc ** CHANGE them if you need to mark them in some special way. Elf/gcc
** (versions 3.2 and later) mark them as "hidden" to optimize access ** (versions 3.2 and later) mark them as "hidden" to optimize access
** when Lua is compiled as a shared library. ** when Lua is compiled as a shared library. Not all elf targets support
** this attribute. Unfortunately, gcc does not offer a way to check
** whether the target offers that support, and those without support
** give a warning about it. To avoid these warnings, change to the
** default definition.
*/ */
#if defined(luaall_c) #if defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \
#define LUAI_FUNC static defined(__ELF__) /* { */
#define LUAI_DATA /* empty */
#elif defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \
defined(__ELF__)
#define LUAI_FUNC __attribute__((visibility("hidden"))) extern #define LUAI_FUNC __attribute__((visibility("hidden"))) extern
#define LUAI_DATA LUAI_FUNC #define LUAI_DDEC LUAI_FUNC
#define LUAI_DDEF /* empty */
#else #else /* }{ */
#define LUAI_FUNC extern #define LUAI_FUNC extern
#define LUAI_DATA extern #define LUAI_DDEC extern
#endif #define LUAI_DDEF /* empty */
#endif /* } */
@ -210,177 +204,110 @@
#define LUA_IDSIZE 60 #define LUA_IDSIZE 60
/*
@@ luai_writestring/luai_writeline define how 'print' prints its results.
** They are only used in libraries and the stand-alone program. (The #if
** avoids including 'stdio.h' everywhere.)
*/
#if defined(LUA_LIB) || defined(lua_c)
#define luai_writestring(s,l) DEBUGF("%s", (s))
#define luai_writeline() luai_writestring("\n", 1)
#endif
/*
@@ luai_writestringerror defines how to print error messages.
** (A format string with one argument is enough for Lua...)
*/
#define luai_writestringerror(s,p) \
(fprintf(stderr, (s), (p)), fflush(stderr))
/*
@@ LUAI_MAXSHORTLEN is the maximum length for short strings, that is,
** strings that are internalized. (Cannot be smaller than reserved words
** or tags for metamethods, as these strings must be internalized;
** #("function") = 8, #("__newindex") = 10.)
*/
#define LUAI_MAXSHORTLEN 40
/* /*
** {================================================================== ** {==================================================================
** Stand-alone configuration ** Compatibility with previous versions
** =================================================================== ** ===================================================================
*/ */
#if defined(lua_c) || defined(luaall_c) /*
@@ LUA_COMPAT_ALL controls all compatibility options.
** You can define it to get all options, or change specific options
** to fit your specific needs.
*/
#if defined(LUA_COMPAT_ALL) /* { */
/* /*
@@ lua_stdin_is_tty detects whether the standard input is a 'tty' (that @@ LUA_COMPAT_UNPACK controls the presence of global 'unpack'.
@* is, whether we're running lua interactively). ** You can replace it with 'table.unpack'.
** CHANGE it if you have a better definition for non-POSIX/non-Windows
** systems.
*/ */
#if defined(LUA_USE_ISATTY) #define LUA_COMPAT_UNPACK
#include <unistd.h>
#define lua_stdin_is_tty() isatty(0) /*
#elif defined(LUA_WIN) @@ LUA_COMPAT_LOADERS controls the presence of table 'package.loaders'.
#include <io.h> ** You can replace it with 'package.searchers'.
#include <stdio.h> */
#define lua_stdin_is_tty() _isatty(_fileno(stdin)) #define LUA_COMPAT_LOADERS
#else
#define lua_stdin_is_tty() 1 /* assume stdin is a tty */ /*
#endif @@ macro 'lua_cpcall' emulates deprecated function lua_cpcall.
** You can call your C function directly (with light C functions).
*/
#define lua_cpcall(L,f,u) \
(lua_pushcfunction(L, (f)), \
lua_pushlightuserdata(L,(u)), \
lua_pcall(L,1,0,0))
/* /*
@@ LUA_PROMPT is the default prompt used by stand-alone Lua. @@ LUA_COMPAT_LOG10 defines the function 'log10' in the math library.
@@ LUA_PROMPT2 is the default continuation prompt used by stand-alone Lua. ** You can rewrite 'log10(x)' as 'log(x, 10)'.
** CHANGE them if you want different prompts. (You can also change the
** prompts dynamically, assigning to globals _PROMPT/_PROMPT2.)
*/ */
#define LUA_PROMPT "> " #define LUA_COMPAT_LOG10
#define LUA_PROMPT2 ">> "
/* /*
@@ LUA_PROGNAME is the default name for the stand-alone Lua program. @@ LUA_COMPAT_LOADSTRING defines the function 'loadstring' in the base
** CHANGE it if your stand-alone interpreter has a different name and ** library. You can rewrite 'loadstring(s)' as 'load(s)'.
** your system is not able to detect that name automatically.
*/ */
#define LUA_PROGNAME "lua" #define LUA_COMPAT_LOADSTRING
/* /*
@@ LUA_MAXINPUT is the maximum length for an input line in the @@ LUA_COMPAT_MAXN defines the function 'maxn' in the table library.
@* stand-alone interpreter.
** CHANGE it if you need longer lines.
*/ */
#define LUA_MAXINPUT 512 #define LUA_COMPAT_MAXN
/* /*
@@ lua_readline defines how to show a prompt and then read a line from @@ The following macros supply trivial compatibility for some
@* the standard input. ** changes in the API. The macros themselves document how to
@@ lua_saveline defines how to "save" a read line in a "history". ** change your code to avoid using them.
@@ lua_freeline defines how to free a line read by lua_readline.
** CHANGE them if you want to improve this functionality (e.g., by using
** GNU readline and history facilities).
*/ */
#if defined(LUA_USE_READLINE) #define lua_strlen(L,i) lua_rawlen(L, (i))
#include <stdio.h>
#include <readline/readline.h>
#include <readline/history.h>
#define lua_readline(L,b,p) ((void)L, ((b)=readline(p)) != NULL)
#define lua_saveline(L,idx) \
if (lua_strlen(L,idx) > 0) /* non-empty line? */ \
add_history(lua_tostring(L, idx)); /* add it to history */
#define lua_freeline(L,b) ((void)L, free(b))
#else
#define lua_readline(L,b,p) \
((void)L, fputs(p, stdout), fflush(stdout), /* show prompt */ \
fgets(b, LUA_MAXINPUT, stdin) != NULL) /* get line */
#define lua_saveline(L,idx) { (void)L; (void)idx; }
#define lua_freeline(L,b) { (void)L; (void)b; }
#endif
#endif #define lua_objlen(L,i) lua_rawlen(L, (i))
#define lua_equal(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPEQ)
#define lua_lessthan(L,idx1,idx2) lua_compare(L,(idx1),(idx2),LUA_OPLT)
/*
@@ LUA_COMPAT_MODULE controls compatibility with previous
** module functions 'module' (Lua) and 'luaL_register' (C).
*/
#define LUA_COMPAT_MODULE
#endif /* } */
#define LUA_COMPAT_MODULE
/* }================================================================== */ /* }================================================================== */
/*
@@ LUAI_GCPAUSE defines the default pause between garbage-collector cycles
@* as a percentage.
** CHANGE it if you want the GC to run faster or slower (higher values
** mean larger pauses which mean slower collection.) You can also change
** this value dynamically.
*/
#define LUAI_GCPAUSE 200 /* 200% (wait memory to double before next GC) */
/*
@@ LUAI_GCMUL defines the default speed of garbage collection relative to
@* memory allocation as a percentage.
** CHANGE it if you want to change the granularity of the garbage
** collection. (Higher values mean coarser collections. 0 represents
** infinity, where each step performs a full collection.) You can also
** change this value dynamically.
*/
#define LUAI_GCMUL 200 /* GC runs 'twice the speed' of memory allocation */
/*
@@ LUA_COMPAT_GETN controls compatibility with old getn behavior.
** CHANGE it (define it) if you want exact compatibility with the
** behavior of setn/getn in Lua 5.0.
*/
#undef LUA_COMPAT_GETN
/*
@@ LUA_COMPAT_LOADLIB controls compatibility about global loadlib.
** CHANGE it to undefined as soon as you do not need a global 'loadlib'
** function (the function is still available as 'package.loadlib').
*/
#undef LUA_COMPAT_LOADLIB
/*
@@ LUA_COMPAT_VARARG controls compatibility with old vararg feature.
** CHANGE it to undefined as soon as your programs use only '...' to
** access vararg parameters (instead of the old 'arg' table).
*/
#undef LUA_COMPAT_VARARG
/*
@@ LUA_COMPAT_MOD controls compatibility with old math.mod function.
** CHANGE it to undefined as soon as your programs use 'math.fmod' or
** the new '%' operator instead of 'math.mod'.
*/
#undef LUA_COMPAT_MOD
/*
@@ LUA_COMPAT_LSTR controls compatibility with old long string nesting
@* facility.
** CHANGE it to 2 if you want the old behaviour, or undefine it to turn
** off the advisory error when nesting [[...]].
*/
#undef LUA_COMPAT_LSTR
/*
@@ LUA_COMPAT_GFIND controls compatibility with old 'string.gfind' name.
** CHANGE it to undefined as soon as you rename 'string.gfind' to
** 'string.gmatch'.
*/
#undef LUA_COMPAT_GFIND
/*
@@ LUA_COMPAT_OPENLIB controls compatibility with old 'luaL_openlib'
@* behavior.
** CHANGE it to undefined as soon as you replace to 'luaL_registry'
** your uses of 'luaL_openlib'
*/
#undef LUA_COMPAT_OPENLIB
/*
@@ luai_apicheck is the assert macro used by the Lua-C API.
** CHANGE luai_apicheck if you want Lua to perform some checks in the
** parameters it gets from API calls. This may slow down the interpreter
** a bit, but may be quite useful when debugging C code that interfaces
** with Lua. A useful redefinition is to use assert.h.
*/
#if defined(LUA_USE_APICHECK)
#include <assert.h>
#define luai_apicheck(L,o) { (void)L; assert(o); }
#else
#define luai_apicheck(L,o) { (void)L; }
#endif
/* /*
@@ LUAI_BITSINT defines the number of bits in an int. @@ LUAI_BITSINT defines the number of bits in an int.
@ -388,108 +315,65 @@
** your machine. Probably you do not need to change this. ** your machine. Probably you do not need to change this.
*/ */
/* avoid overflows in comparison */ /* avoid overflows in comparison */
#if INT_MAX-20 < 32760 #if INT_MAX-20 < 32760 /* { */
#define LUAI_BITSINT 16 #define LUAI_BITSINT 16
#elif INT_MAX > 2147483640L #elif INT_MAX > 2147483640L /* }{ */
/* int has at least 32 bits */ /* int has at least 32 bits */
#define LUAI_BITSINT 32 #define LUAI_BITSINT 32
#else #else /* }{ */
#error "you must define LUA_BITSINT with number of bits in an integer" #error "you must define LUA_BITSINT with number of bits in an integer"
#endif #endif /* } */
/* /*
@@ LUAI_UINT32 is an unsigned integer with at least 32 bits. @@ LUA_INT32 is an signed integer with exactly 32 bits.
@@ LUAI_INT32 is an signed integer with at least 32 bits.
@@ LUAI_UMEM is an unsigned integer big enough to count the total @@ LUAI_UMEM is an unsigned integer big enough to count the total
@* memory used by Lua. @* memory used by Lua.
@@ LUAI_MEM is a signed integer big enough to count the total memory @@ LUAI_MEM is a signed integer big enough to count the total memory
@* used by Lua. @* used by Lua.
** CHANGE here if for some weird reason the default definitions are not ** CHANGE here if for some weird reason the default definitions are not
** good enough for your machine. (The definitions in the 'else' ** good enough for your machine. Probably you do not need to change
** part always works, but may waste space on machines with 64-bit ** this.
** longs.) Probably you do not need to change this.
*/ */
#if LUAI_BITSINT >= 32 #if LUAI_BITSINT >= 32 /* { */
#define LUAI_UINT32 unsigned int #define LUA_INT32 int
#define LUAI_INT32 int
#define LUAI_MAXINT32 INT_MAX
#define LUAI_UMEM size_t #define LUAI_UMEM size_t
#define LUAI_MEM ptrdiff_t #define LUAI_MEM ptrdiff_t
#else #else /* }{ */
/* 16-bit ints */ /* 16-bit ints */
#define LUAI_UINT32 unsigned long #define LUA_INT32 long
#define LUAI_INT32 long
#define LUAI_MAXINT32 LONG_MAX
#define LUAI_UMEM unsigned long #define LUAI_UMEM unsigned long
#define LUAI_MEM long #define LUAI_MEM long
#endif /* } */
/*
@@ LUAI_MAXSTACK limits the size of the Lua stack.
** CHANGE it if you need a different limit. This limit is arbitrary;
** its only purpose is to stop Lua to consume unlimited stack
** space (and to reserve some numbers for pseudo-indices).
*/
#if LUAI_BITSINT >= 32
#define LUAI_MAXSTACK 1000000
#else
#define LUAI_MAXSTACK 15000
#endif #endif
/* reserve some space for error handling */
/* #define LUAI_FIRSTPSEUDOIDX (-LUAI_MAXSTACK - 1000)
@@ LUAI_MAXCALLS limits the number of nested calls.
** CHANGE it if you need really deep recursive calls. This limit is
** arbitrary; its only purpose is to stop infinite recursion before
** exhausting memory.
*/
#define LUAI_MAXCALLS 20000
/*
@@ LUAI_MAXCSTACK limits the number of Lua stack slots that a C function
@* can use.
** CHANGE it if you need lots of (Lua) stack space for your C
** functions. This limit is arbitrary; its only purpose is to stop C
** functions to consume unlimited stack space. (must be smaller than
** -LUA_REGISTRYINDEX)
*/
#define LUAI_MAXCSTACK 8000
/*
** {==================================================================
** CHANGE (to smaller values) the following definitions if your system
** has a small C stack. (Or you may want to change them to larger
** values if your system has a large C stack and these limits are
** too rigid for you.) Some of these constants control the size of
** stack-allocated arrays used by the compiler or the interpreter, while
** others limit the maximum number of recursive calls that the compiler
** or the interpreter can perform. Values too large may cause a C stack
** overflow for some forms of deep constructs.
** ===================================================================
*/
/*
@@ LUAI_MAXCCALLS is the maximum depth for nested C calls (short) and
@* syntactical nested non-terminals in a program.
*/
#define LUAI_MAXCCALLS 200
/*
@@ LUAI_MAXVARS is the maximum number of local variables per function
@* (must be smaller than 250).
*/
#define LUAI_MAXVARS 200
/*
@@ LUAI_MAXUPVALUES is the maximum number of upvalues per function
@* (must be smaller than 250).
*/
#define LUAI_MAXUPVALUES 60
/* /*
@@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system. @@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system.
** CHANGE it if it uses too much C-stack space.
*/ */
#define LUAL_BUFFERSIZE 1024 #define LUAL_BUFFERSIZE 1024
/* }================================================================== */ #ifndef SIMULATOR
typedef void FILE;
#endif
/* /*
@ -516,238 +400,139 @@
@@ LUA_NUMBER_FMT is the format for writing numbers. @@ LUA_NUMBER_FMT is the format for writing numbers.
@@ lua_number2str converts a number to a string. @@ lua_number2str converts a number to a string.
@@ LUAI_MAXNUMBER2STR is maximum size of previous conversion. @@ LUAI_MAXNUMBER2STR is maximum size of previous conversion.
@@ lua_str2number converts a string to a number.
*/ */
#define LUA_NUMBER_SCAN "%ld" #define LUA_NUMBER_SCAN "%ld"
#define LUA_NUMBER_FMT "%ld" #define LUA_NUMBER_FMT "%ld"
#define LUAI_MAXNUMBER2STR 32 /* 16 digits, sign, point, and \0 */ #define LUAI_MAXNUMBER2STR 32 /* 16 digits, sign, point, and \0 */
#define lua_number2str(s,n) snprintf((s), 32, LUA_NUMBER_FMT, (n)) #define lua_number2str(s,n) snprintf((s), 32, LUA_NUMBER_FMT, (n))
/*
@@ l_mathop allows the addition of an 'l' or 'f' to all math operations
*/
#define l_mathop(x) (x)
/*
@@ lua_str2number converts a decimal numeric string to a number.
@@ lua_strx2number converts an hexadecimal numeric string to a number.
** In C99, 'strtod' does both conversions. C89, however, has no function
** to convert floating hexadecimal strings to numbers. For these
** systems, you can leave 'lua_strx2number' undefined and Lua will
** provide its own implementation.
*/
#define lua_str2number(s,p) strtol((s), (p), 10) #define lua_str2number(s,p) strtol((s), (p), 10)
#define lua_strx2number(s,p) strtoul((s), (p), 16)
/* /*
@@ The luai_num* macros define the primitive operations over numbers. @@ The luai_num* macros define the primitive operations over numbers.
*/ */
/* these are quite standard operations */
#if defined(LUA_CORE) #if defined(LUA_CORE)
extern long rb_pow(long, long); extern long rb_pow(long, long);
#define luai_numadd(a,b) ((a)+(b)) #define luai_numadd(L,a,b) ((a)+(b))
#define luai_numsub(a,b) ((a)-(b)) #define luai_numsub(L,a,b) ((a)-(b))
#define luai_nummul(a,b) ((a)*(b)) #define luai_nummul(L,a,b) ((a)*(b))
#define luai_numdiv(a,b) ((a)/(b)) #define luai_numdiv(L,a,b) ((a)/(b))
#define luai_nummod(a,b) ((a)%(b)) #define luai_nummod(L,a,b) ((a)%(b))
#define luai_numpow(a,b) (rb_pow(a,b)) #define luai_numpow(L,a,b) (rb_pow(a,b))
#define luai_numunm(a) (-(a)) #define luai_numunm(L,a) (-(a))
#define luai_numeq(a,b) ((a)==(b)) #define luai_numeq(a,b) ((a)==(b))
#define luai_numlt(a,b) ((a)<(b)) #define luai_numlt(L,a,b) ((a)<(b))
#define luai_numle(a,b) ((a)<=(b)) #define luai_numle(L,a,b) ((a)<=(b))
#define luai_numisnan(a) (!luai_numeq((a), (a))) #define luai_numisnan(L,a) (!luai_numeq((a), (a)))
#endif #endif
/* /*
@@ lua_number2int is a macro to convert lua_Number to int. @@ LUA_INTEGER is the integral type used by lua_pushinteger/lua_tointeger.
@@ lua_number2integer is a macro to convert lua_Number to lua_Integer. ** CHANGE that if ptrdiff_t is not adequate on your machine. (On most
** CHANGE them if you know a faster way to convert a lua_Number to ** machines, ptrdiff_t gives a good choice between int or long.)
** int (with any rounding method and without throwing errors) in your */
** system. In Pentium machines, a naive typecast from double to int #define LUA_INTEGER ptrdiff_t
** in C is extremely slow, so any alternative is worth trying.
/*
@@ LUA_UNSIGNED is the integral type used by lua_pushunsigned/lua_tounsigned.
** It must have at least 32 bits.
*/
#define LUA_UNSIGNED unsigned LUA_INT32
/*
** Some tricks with doubles
*/ */
/* On a Pentium, resort to a trick */ #if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) /* { */
#if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) && !defined(__SSE2__) && \ /*
(defined(__i386) || defined (_M_IX86) || defined(__i386__)) ** The next definitions activate some tricks to speed up the
** conversion from doubles to integer types, mainly to LUA_UNSIGNED.
**
@@ LUA_MSASMTRICK uses Microsoft assembler to avoid clashes with a
** DirectX idiosyncrasy.
**
@@ LUA_IEEE754TRICK uses a trick that should work on any machine
** using IEEE754 with a 32-bit integer type.
**
@@ LUA_IEEELL extends the trick to LUA_INTEGER; should only be
** defined when LUA_INTEGER is a 32-bit integer.
**
@@ LUA_IEEEENDIAN is the endianness of doubles in your machine
** (0 for little endian, 1 for big endian); if not defined, Lua will
** check it dynamically for LUA_IEEE754TRICK (but not for LUA_NANTRICK).
**
@@ LUA_NANTRICK controls the use of a trick to pack all types into
** a single double value, using NaN values to represent non-number
** values. The trick only works on 32-bit machines (ints and pointers
** are 32-bit values) with numbers represented as IEEE 754-2008 doubles
** with conventional endianess (12345678 or 87654321), in CPUs that do
** not produce signaling NaN values (all NaNs are quiet).
*/
/* On a Microsoft compiler, use assembler */ /* Microsoft compiler on a Pentium (32 bit) ? */
#if defined(_MSC_VER) #if defined(LUA_WIN) && defined(_MSC_VER) && defined(_M_IX86) /* { */
#define lua_number2int(i,d) __asm fld d __asm fistp i #define LUA_MSASMTRICK
#define lua_number2integer(i,n) lua_number2int(i, n) #define LUA_IEEEENDIAN 0
#define LUA_NANTRICK
/* the next trick should work on any Pentium, but sometimes clashes
with a DirectX idiosyncrasy */
#else
union luai_Cast { double l_d; long l_l; };
#define lua_number2int(i,d) \
{ volatile union luai_Cast u; u.l_d = (d) + 6755399441055744.0; (i) = u.l_l; }
#define lua_number2integer(i,n) lua_number2int(i, n)
#endif
/* this option always works, but may be slow */ /* pentium 32 bits? */
#else #elif defined(__i386__) || defined(__i386) || defined(__X86__) /* }{ */
#define lua_number2int(i,d) ((i)=(int)(d))
#define lua_number2integer(i,d) ((i)=(lua_Integer)(d))
#endif #define LUA_IEEE754TRICK
#define LUA_IEEELL
#define LUA_IEEEENDIAN 0
#define LUA_NANTRICK
/* pentium 64 bits? */
#elif defined(__x86_64) /* }{ */
#define LUA_IEEE754TRICK
#define LUA_IEEEENDIAN 0
#elif defined(__POWERPC__) || defined(__ppc__) /* }{ */
#define LUA_IEEE754TRICK
#define LUA_IEEEENDIAN 1
#else /* }{ */
/* assume IEEE754 and a 32-bit integer type */
#define LUA_IEEE754TRICK
#endif /* } */
#endif /* } */
/* }================================================================== */ /* }================================================================== */
/*
@@ LUAI_USER_ALIGNMENT_T is a type that requires maximum alignment.
** CHANGE it if your system requires alignments larger than double. (For
** instance, if your system supports long doubles and they must be
** aligned in 16-byte boundaries, then you should add long double in the
** union.) Probably you do not need to change this.
*/
#define LUAI_USER_ALIGNMENT_T union { void *s; long l; }
/*
@@ LUAI_THROW/LUAI_TRY define how Lua does exception handling.
** CHANGE them if you prefer to use longjmp/setjmp even with C++
** or if want/don't to use _longjmp/_setjmp instead of regular
** longjmp/setjmp. By default, Lua handles errors with exceptions when
** compiling as C++ code, with _longjmp/_setjmp when asked to use them,
** and with longjmp/setjmp otherwise.
*/
#if defined(__cplusplus)
/* C++ exceptions */
#define LUAI_THROW(L,c) throw(c)
#define LUAI_TRY(L,c,a) try { a } catch(...) \
{ if ((c)->status == 0) (c)->status = -1; }
#define luai_jmpbuf int /* dummy variable */
#elif defined(LUA_USE_ULONGJMP)
/* in Unix, try _longjmp/_setjmp (more efficient) */
#define LUAI_THROW(L,c) _longjmp((c)->b, 1)
#define LUAI_TRY(L,c,a) if (_setjmp((c)->b) == 0) { a }
#define luai_jmpbuf jmp_buf
#else
/* default handling with long jumps */
#define LUAI_THROW(L,c) longjmp((c)->b, 1)
#define LUAI_TRY(L,c,a) if (setjmp((c)->b) == 0) { a }
#define luai_jmpbuf jmp_buf
#endif
/*
@@ LUA_MAXCAPTURES is the maximum number of captures that a pattern
@* can do during pattern-matching.
** CHANGE it if you need more captures. This limit is arbitrary.
*/
#define LUA_MAXCAPTURES 32
/*
@@ lua_tmpnam is the function that the OS library uses to create a
@* temporary name.
@@ LUA_TMPNAMBUFSIZE is the maximum size of a name created by lua_tmpnam.
** CHANGE them if you have an alternative to tmpnam (which is considered
** insecure) or if you want the original tmpnam anyway. By default, Lua
** uses tmpnam except when POSIX is available, where it uses mkstemp.
*/
#if defined(loslib_c) || defined(luaall_c)
#if defined(LUA_USE_MKSTEMP)
#include <unistd.h>
#define LUA_TMPNAMBUFSIZE 32
#define lua_tmpnam(b,e) { \
strcpy(b, "/tmp/lua_XXXXXX"); \
e = mkstemp(b); \
if (e != -1) close(e); \
e = (e == -1); }
#else
#define LUA_TMPNAMBUFSIZE L_tmpnam
#define lua_tmpnam(b,e) { e = (tmpnam(b) == NULL); }
#endif
#endif
/*
@@ lua_popen spawns a new process connected to the current one through
@* the file streams.
** CHANGE it if you have a way to implement it in your system.
*/
#if defined(LUA_USE_POPEN)
#define lua_popen(L,c,m) ((void)L, fflush(NULL), popen(c,m))
#define lua_pclose(L,file) ((void)L, (pclose(file) != -1))
#elif defined(LUA_WIN)
#define lua_popen(L,c,m) ((void)L, _popen(c,m))
#define lua_pclose(L,file) ((void)L, (_pclose(file) != -1))
#else
#define lua_popen(L,c,m) ((void)((void)c, m), \
luaL_error(L, LUA_QL("popen") " not supported"), (FILE*)0)
#define lua_pclose(L,file) ((void)((void)L, file), 0)
#endif
/*
@@ LUA_DL_* define which dynamic-library system Lua should use.
** CHANGE here if Lua has problems choosing the appropriate
** dynamic-library system for your platform (either Windows' DLL, Mac's
** dyld, or Unix's dlopen). If your system is some kind of Unix, there
** is a good chance that it has dlopen, so LUA_DL_DLOPEN will work for
** it. To use dlopen you also need to adapt the src/Makefile (probably
** adding -ldl to the linker options), so Lua does not select it
** automatically. (When you change the makefile to add -ldl, you must
** also add -DLUA_USE_DLOPEN.)
** If you do not want any kind of dynamic library, undefine all these
** options.
** By default, _WIN32 gets LUA_DL_DLL and MAC OS X gets LUA_DL_DYLD.
*/
#if defined(LUA_USE_DLOPEN)
#define LUA_DL_DLOPEN
#endif
#if defined(LUA_WIN)
#define LUA_DL_DLL
#endif
/*
@@ LUAI_EXTRASPACE allows you to add user-specific data in a lua_State
@* (the data goes just *before* the lua_State pointer).
** CHANGE (define) this if you really need that. This value must be
** a multiple of the maximum alignment required for your machine.
*/
#define LUAI_EXTRASPACE 0
/*
@@ luai_userstate* allow user-specific actions on threads.
** CHANGE them if you defined LUAI_EXTRASPACE and need to do something
** extra when a thread is created/deleted/resumed/yielded.
*/
#define luai_userstateopen(L) ((void)L)
#define luai_userstateclose(L) ((void)L)
#define luai_userstatethread(L,L1) ((void)L)
#define luai_userstatefree(L) ((void)L)
#define luai_userstateresume(L,n) ((void)L)
#define luai_userstateyield(L,n) ((void)L)
/*
@@ LUA_INTFRMLEN is the length modifier for integer conversions
@* in 'string.format'.
@@ LUA_INTFRM_T is the integer type correspoding to the previous length
@* modifier.
** CHANGE them if your system supports long long or does not support long.
*/
#if defined(LUA_USELONGLONG)
#define LUA_INTFRMLEN "ll"
#define LUA_INTFRM_T long long
#else
#define LUA_INTFRMLEN "l"
#define LUA_INTFRM_T long
#endif
/* =================================================================== */ /* =================================================================== */
@ -758,6 +543,7 @@ union luai_Cast { double l_d; long l_l; };
*/ */
#include "rockconf.h" #include "rockconf.h"
#define LUA_USE_CTYPE 1
#endif #endif

View file

@ -98,7 +98,7 @@ static int dir_iter_factory (lua_State *L) {
lua_setmetatable (L, -2); lua_setmetatable (L, -2);
d->dir = rb->opendir (path); d->dir = rb->opendir (path);
if (d->dir == NULL) if (d->dir == NULL)
luaL_error (L, "cannot open %s: %d", path, errno); luaL_error (L, "cannot open dir %s: %d", path, errno);
return 2; return 2;
} }
@ -125,7 +125,7 @@ static int dir_create_meta (lua_State *L) {
return 1; return 1;
} }
static const struct luaL_reg fslib[] = { static const struct luaL_Reg fslib[] = {
{"dir", dir_iter_factory}, {"dir", dir_iter_factory},
{"mkdir", make_dir}, {"mkdir", make_dir},
{"rmdir", remove_dir}, {"rmdir", remove_dir},

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: lualib.h,v 1.43.1.1 2013/04/12 18:48:47 roberto Exp $
** Lua standard libraries ** Lua standard libraries
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -11,43 +11,43 @@
#include "lua.h" #include "lua.h"
/* Key to file-handle type */
#define LUA_FILEHANDLE "FILE*"
LUAMOD_API int (luaopen_base) (lua_State *L);
#define LUA_COLIBNAME "coroutine" #define LUA_COLIBNAME "coroutine"
LUALIB_API int (luaopen_base) (lua_State *L); LUAMOD_API int (luaopen_coroutine) (lua_State *L);
#define LUA_TABLIBNAME "table" #define LUA_TABLIBNAME "table"
LUALIB_API int (luaopen_table) (lua_State *L); LUAMOD_API int (luaopen_table) (lua_State *L);
#define LUA_IOLIBNAME "io" #define LUA_IOLIBNAME "io"
LUALIB_API int (luaopen_io) (lua_State *L); LUAMOD_API int (luaopen_io) (lua_State *L);
#define LUA_OSLIBNAME "os" #define LUA_OSLIBNAME "os"
LUALIB_API int (luaopen_os) (lua_State *L); LUAMOD_API int (luaopen_os) (lua_State *L);
#define LUA_STRLIBNAME "string" #define LUA_STRLIBNAME "string"
LUALIB_API int (luaopen_string) (lua_State *L); LUAMOD_API int (luaopen_string) (lua_State *L);
#define LUA_BITLIBNAME "bit32"
LUAMOD_API int (luaopen_bit32) (lua_State *L);
#define LUA_MATHLIBNAME "math" #define LUA_MATHLIBNAME "math"
LUALIB_API int (luaopen_math) (lua_State *L); LUAMOD_API int (luaopen_math) (lua_State *L);
#define LUA_DBLIBNAME "debug" #define LUA_DBLIBNAME "debug"
LUALIB_API int (luaopen_debug) (lua_State *L); LUAMOD_API int (luaopen_debug) (lua_State *L);
#define LUA_LOADLIBNAME "package" #define LUA_LOADLIBNAME "package"
LUALIB_API int (luaopen_package) (lua_State *L); LUAMOD_API int (luaopen_package) (lua_State *L);
#define LUA_BITLIBNAME "bit"
LUALIB_API int (luaopen_bit) (lua_State *L);
/* open all previous libraries */ /* open all previous libraries */
LUALIB_API void (luaL_openlibs) (lua_State *L); LUALIB_API void (luaL_openlibs) (lua_State *L);
#ifndef lua_assert #if !defined(lua_assert)
#define lua_assert(x) ((void)0) #define lua_assert(x) ((void)0)
#endif #endif

View file

@ -1,5 +1,5 @@
/* /*
** $Id: lundump.c,v 2.7.1.4 2008/04/04 19:51:41 roberto Exp $ ** $Id: lundump.c,v 2.22.1.1 2013/04/12 18:48:47 roberto Exp $
** load precompiled Lua chunks ** load precompiled Lua chunks
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -27,28 +27,24 @@ typedef struct {
const char* name; const char* name;
} LoadState; } LoadState;
#ifdef LUAC_TRUST_BINARIES static l_noret error(LoadState* S, const char* why)
#define IF(c,s)
#define error(S,s)
#else
#define IF(c,s) if (c) error(S,s)
static void error(LoadState* S, const char* why)
{ {
luaO_pushfstring(S->L,"%s: %s in precompiled chunk",S->name,why); luaO_pushfstring(S->L,"%s: %s precompiled chunk",S->name,why);
luaD_throw(S->L,LUA_ERRSYNTAX); luaD_throw(S->L,LUA_ERRSYNTAX);
} }
#endif
#define LoadMem(S,b,n,size) LoadBlock(S,b,(n)*(size)) #define LoadMem(S,b,n,size) LoadBlock(S,b,(n)*(size))
#define LoadByte(S) (lu_byte)LoadChar(S) #define LoadByte(S) (lu_byte)LoadChar(S)
#define LoadVar(S,x) LoadMem(S,&x,1,sizeof(x)) #define LoadVar(S,x) LoadMem(S,&x,1,sizeof(x))
#define LoadVector(S,b,n,size) LoadMem(S,b,n,size) #define LoadVector(S,b,n,size) LoadMem(S,b,n,size)
#if !defined(luai_verifycode)
#define luai_verifycode(L,b,f) /* empty */
#endif
static void LoadBlock(LoadState* S, void* b, size_t size) static void LoadBlock(LoadState* S, void* b, size_t size)
{ {
size_t r=luaZ_read(S->Z,b,size); if (luaZ_read(S->Z,b,size)!=0) error(S,"truncated");
IF (r!=0, "unexpected end");
} }
static int LoadChar(LoadState* S) static int LoadChar(LoadState* S)
@ -62,7 +58,7 @@ static int LoadInt(LoadState* S)
{ {
int x; int x;
LoadVar(S,x); LoadVar(S,x);
IF (x<0, "bad integer"); if (x<0) error(S,"corrupted");
return x; return x;
} }
@ -82,7 +78,7 @@ static TString* LoadString(LoadState* S)
else else
{ {
char* s=luaZ_openspace(S->L,S->b,size); char* s=luaZ_openspace(S->L,S->b,size);
LoadBlock(S,s,size); LoadBlock(S,s,size*sizeof(char));
return luaS_newlstr(S->L,s,size-1); /* remove trailing '\0' */ return luaS_newlstr(S->L,s,size-1); /* remove trailing '\0' */
} }
} }
@ -95,7 +91,7 @@ static void LoadCode(LoadState* S, Proto* f)
LoadVector(S,f->code,n,sizeof(Instruction)); LoadVector(S,f->code,n,sizeof(Instruction));
} }
static Proto* LoadFunction(LoadState* S, TString* p); static void LoadFunction(LoadState* S, Proto* f);
static void LoadConstants(LoadState* S, Proto* f) static void LoadConstants(LoadState* S, Proto* f)
{ {
@ -111,10 +107,10 @@ static void LoadConstants(LoadState* S, Proto* f)
switch (t) switch (t)
{ {
case LUA_TNIL: case LUA_TNIL:
setnilvalue(o); setnilvalue(o);
break; break;
case LUA_TBOOLEAN: case LUA_TBOOLEAN:
setbvalue(o,LoadChar(S)!=0); setbvalue(o,LoadChar(S));
break; break;
case LUA_TNUMBER: case LUA_TNUMBER:
setnvalue(o,LoadNumber(S)); setnvalue(o,LoadNumber(S));
@ -122,21 +118,38 @@ static void LoadConstants(LoadState* S, Proto* f)
case LUA_TSTRING: case LUA_TSTRING:
setsvalue2n(S->L,o,LoadString(S)); setsvalue2n(S->L,o,LoadString(S));
break; break;
default: default: lua_assert(0);
error(S,"bad constant");
break;
} }
} }
n=LoadInt(S); n=LoadInt(S);
f->p=luaM_newvector(S->L,n,Proto*); f->p=luaM_newvector(S->L,n,Proto*);
f->sizep=n; f->sizep=n;
for (i=0; i<n; i++) f->p[i]=NULL; for (i=0; i<n; i++) f->p[i]=NULL;
for (i=0; i<n; i++) f->p[i]=LoadFunction(S,f->source); for (i=0; i<n; i++)
{
f->p[i]=luaF_newproto(S->L);
LoadFunction(S,f->p[i]);
}
}
static void LoadUpvalues(LoadState* S, Proto* f)
{
int i,n;
n=LoadInt(S);
f->upvalues=luaM_newvector(S->L,n,Upvaldesc);
f->sizeupvalues=n;
for (i=0; i<n; i++) f->upvalues[i].name=NULL;
for (i=0; i<n; i++)
{
f->upvalues[i].instack=LoadByte(S);
f->upvalues[i].idx=LoadByte(S);
}
} }
static void LoadDebug(LoadState* S, Proto* f) static void LoadDebug(LoadState* S, Proto* f)
{ {
int i,n; int i,n;
f->source=LoadString(S);
n=LoadInt(S); n=LoadInt(S);
f->lineinfo=luaM_newvector(S->L,n,int); f->lineinfo=luaM_newvector(S->L,n,int);
f->sizelineinfo=n; f->sizelineinfo=n;
@ -152,49 +165,48 @@ static void LoadDebug(LoadState* S, Proto* f)
f->locvars[i].endpc=LoadInt(S); f->locvars[i].endpc=LoadInt(S);
} }
n=LoadInt(S); n=LoadInt(S);
f->upvalues=luaM_newvector(S->L,n,TString*); for (i=0; i<n; i++) f->upvalues[i].name=LoadString(S);
f->sizeupvalues=n;
for (i=0; i<n; i++) f->upvalues[i]=NULL;
for (i=0; i<n; i++) f->upvalues[i]=LoadString(S);
} }
static Proto* LoadFunction(LoadState* S, TString* p) static void LoadFunction(LoadState* S, Proto* f)
{ {
Proto* f;
if (++S->L->nCcalls > LUAI_MAXCCALLS) error(S,"code too deep");
f=luaF_newproto(S->L);
setptvalue2s(S->L,S->L->top,f); incr_top(S->L);
f->source=LoadString(S); if (f->source==NULL) f->source=p;
f->linedefined=LoadInt(S); f->linedefined=LoadInt(S);
f->lastlinedefined=LoadInt(S); f->lastlinedefined=LoadInt(S);
f->nups=LoadByte(S);
f->numparams=LoadByte(S); f->numparams=LoadByte(S);
f->is_vararg=LoadByte(S); f->is_vararg=LoadByte(S);
f->maxstacksize=LoadByte(S); f->maxstacksize=LoadByte(S);
LoadCode(S,f); LoadCode(S,f);
LoadConstants(S,f); LoadConstants(S,f);
LoadUpvalues(S,f);
LoadDebug(S,f); LoadDebug(S,f);
IF (!luaG_checkcode(f), "bad code");
S->L->top--;
S->L->nCcalls--;
return f;
} }
/* the code below must be consistent with the code in luaU_header */
#define N0 LUAC_HEADERSIZE
#define N1 (sizeof(LUA_SIGNATURE)-sizeof(char))
#define N2 N1+2
#define N3 N2+6
static void LoadHeader(LoadState* S) static void LoadHeader(LoadState* S)
{ {
char h[LUAC_HEADERSIZE]; lu_byte h[LUAC_HEADERSIZE];
char s[LUAC_HEADERSIZE]; lu_byte s[LUAC_HEADERSIZE];
luaU_header(h); luaU_header(h);
LoadBlock(S,s,LUAC_HEADERSIZE); memcpy(s,h,sizeof(char)); /* first char already read */
IF (memcmp(h,s,LUAC_HEADERSIZE)!=0, "bad header"); LoadBlock(S,s+sizeof(char),LUAC_HEADERSIZE-sizeof(char));
if (memcmp(h,s,N0)==0) return;
if (memcmp(h,s,N1)!=0) error(S,"not a");
if (memcmp(h,s,N2)!=0) error(S,"version mismatch in");
if (memcmp(h,s,N3)!=0) error(S,"incompatible"); else error(S,"corrupted");
} }
/* /*
** load precompiled chunk ** load precompiled chunk
*/ */
Proto* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff, const char* name) Closure* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff, const char* name)
{ {
LoadState S; LoadState S;
Closure* cl;
if (*name=='@' || *name=='=') if (*name=='@' || *name=='=')
S.name=name+1; S.name=name+1;
else if (*name==LUA_SIGNATURE[0]) else if (*name==LUA_SIGNATURE[0])
@ -205,23 +217,43 @@ Proto* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff, const char* name)
S.Z=Z; S.Z=Z;
S.b=buff; S.b=buff;
LoadHeader(&S); LoadHeader(&S);
return LoadFunction(&S,luaS_newliteral(L,"=?")); cl=luaF_newLclosure(L,1);
setclLvalue(L,L->top,cl); incr_top(L);
cl->l.p=luaF_newproto(L);
LoadFunction(&S,cl->l.p);
if (cl->l.p->sizeupvalues != 1)
{
Proto* p=cl->l.p;
cl=luaF_newLclosure(L,cl->l.p->sizeupvalues);
cl->l.p=p;
setclLvalue(L,L->top-1,cl);
}
luai_verifycode(L,buff,cl->l.p);
return cl;
} }
#define MYINT(s) (s[0]-'0')
#undef VERSION
#define VERSION MYINT(LUA_VERSION_MAJOR)*16+MYINT(LUA_VERSION_MINOR)
#define FORMAT 0 /* this is the official format */
/* /*
* make header * make header for precompiled chunks
* if you change the code below be sure to update LoadHeader and FORMAT above
* and LUAC_HEADERSIZE in lundump.h
*/ */
void luaU_header (char* h) void luaU_header (lu_byte* h)
{ {
int x=1; int x=1;
memcpy(h,LUA_SIGNATURE,sizeof(LUA_SIGNATURE)-1); memcpy(h,LUA_SIGNATURE,sizeof(LUA_SIGNATURE)-sizeof(char));
h+=sizeof(LUA_SIGNATURE)-1; h+=sizeof(LUA_SIGNATURE)-sizeof(char);
*h++=(char)LUAC_VERSION; *h++=cast_byte(VERSION);
*h++=(char)LUAC_FORMAT; *h++=cast_byte(FORMAT);
*h++=(char)*(char*)&x; /* endianness */ *h++=cast_byte(*(char*)&x); /* endianness */
*h++=(char)sizeof(int); *h++=cast_byte(sizeof(int));
*h++=(char)sizeof(size_t); *h++=cast_byte(sizeof(size_t));
*h++=(char)sizeof(Instruction); *h++=cast_byte(sizeof(Instruction));
*h++=(char)sizeof(lua_Number); *h++=cast_byte(sizeof(lua_Number));
*h++=(char)(((lua_Number)0.5)==0); /* is lua_Number integral? */ *h++=cast_byte(((lua_Number)0.5)==0); /* is lua_Number integral? */
memcpy(h,LUAC_TAIL,sizeof(LUAC_TAIL)-sizeof(char));
} }

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: lundump.h,v 1.39.1.1 2013/04/12 18:48:47 roberto Exp $
** load precompiled Lua chunks ** load precompiled Lua chunks
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -11,26 +11,18 @@
#include "lzio.h" #include "lzio.h"
/* load one chunk; from lundump.c */ /* load one chunk; from lundump.c */
LUAI_FUNC Proto* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff, const char* name); LUAI_FUNC Closure* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff, const char* name);
/* make header; from lundump.c */ /* make header; from lundump.c */
LUAI_FUNC void luaU_header (char* h); LUAI_FUNC void luaU_header (lu_byte* h);
/* dump one chunk; from ldump.c */ /* dump one chunk; from ldump.c */
LUAI_FUNC int luaU_dump (lua_State* L, const Proto* f, lua_Writer w, void* data, int strip); LUAI_FUNC int luaU_dump (lua_State* L, const Proto* f, lua_Writer w, void* data, int strip);
#ifdef luac_c /* data to catch conversion errors */
/* print one chunk; from print.c */ #define LUAC_TAIL "\x19\x93\r\n\x1a\n"
LUAI_FUNC void luaU_print (const Proto* f, int full);
#endif
/* for header of binary files -- this is Lua 5.1 */ /* size in bytes of header of binary files */
#define LUAC_VERSION 0x51 #define LUAC_HEADERSIZE (sizeof(LUA_SIGNATURE)-sizeof(char)+2+6+sizeof(LUAC_TAIL)-sizeof(char))
/* for header of binary files -- this is the official format */
#define LUAC_FORMAT 0
/* size of header of binary files */
#define LUAC_HEADERSIZE 12
#endif #endif

File diff suppressed because it is too large Load diff

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: lvm.h,v 2.18.1.1 2013/04/12 18:48:47 roberto Exp $
** Lua virtual machine ** Lua virtual machine
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -13,24 +13,32 @@
#include "ltm.h" #include "ltm.h"
#define tostring(L,o) ((ttype(o) == LUA_TSTRING) || (luaV_tostring(L, o))) #define tostring(L,o) (ttisstring(o) || (luaV_tostring(L, o)))
#define tonumber(o,n) (ttype(o) == LUA_TNUMBER || \ #define tonumber(o,n) (ttisnumber(o) || (((o) = luaV_tonumber(o,n)) != NULL))
(((o) = luaV_tonumber(o,n)) != NULL))
#define equalobj(L,o1,o2) \ #define equalobj(L,o1,o2) (ttisequal(o1, o2) && luaV_equalobj_(L, o1, o2))
(ttype(o1) == ttype(o2) && luaV_equalval(L, o1, o2))
#define luaV_rawequalobj(o1,o2) equalobj(NULL,o1,o2)
/* not to called directly */
LUAI_FUNC int luaV_equalobj_ (lua_State *L, const TValue *t1, const TValue *t2);
LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r); LUAI_FUNC int luaV_lessthan (lua_State *L, const TValue *l, const TValue *r);
LUAI_FUNC int luaV_equalval (lua_State *L, const TValue *t1, const TValue *t2); LUAI_FUNC int luaV_lessequal (lua_State *L, const TValue *l, const TValue *r);
LUAI_FUNC const TValue *luaV_tonumber (const TValue *obj, TValue *n); LUAI_FUNC const TValue *luaV_tonumber (const TValue *obj, TValue *n);
LUAI_FUNC int luaV_tostring (lua_State *L, StkId obj); LUAI_FUNC int luaV_tostring (lua_State *L, StkId obj);
LUAI_FUNC void luaV_gettable (lua_State *L, const TValue *t, TValue *key, LUAI_FUNC void luaV_gettable (lua_State *L, const TValue *t, TValue *key,
StkId val); StkId val);
LUAI_FUNC void luaV_settable (lua_State *L, const TValue *t, TValue *key, LUAI_FUNC void luaV_settable (lua_State *L, const TValue *t, TValue *key,
StkId val); StkId val);
LUAI_FUNC void luaV_execute (lua_State *L, int nexeccalls); LUAI_FUNC void luaV_finishOp (lua_State *L);
LUAI_FUNC void luaV_concat (lua_State *L, int total, int last); LUAI_FUNC void luaV_execute (lua_State *L);
LUAI_FUNC void luaV_concat (lua_State *L, int total);
LUAI_FUNC void luaV_arith (lua_State *L, StkId ra, const TValue *rb,
const TValue *rc, TMS op);
LUAI_FUNC void luaV_objlen (lua_State *L, StkId ra, const TValue *rb);
#endif #endif

View file

@ -1,6 +1,6 @@
/* /*
** $Id: lzio.c,v 1.31.1.1 2007/12/27 13:02:25 roberto Exp $ ** $Id: lzio.c,v 1.35.1.1 2013/04/12 18:48:47 roberto Exp $
** a generic input stream interface ** Buffered streams
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -25,23 +25,11 @@ int luaZ_fill (ZIO *z) {
lua_unlock(L); lua_unlock(L);
buff = z->reader(L, z->data, &size); buff = z->reader(L, z->data, &size);
lua_lock(L); lua_lock(L);
if (buff == NULL || size == 0) return EOZ; if (buff == NULL || size == 0)
z->n = size - 1; return EOZ;
z->n = size - 1; /* discount char being returned */
z->p = buff; z->p = buff;
return char2int(*(z->p++)); return cast_uchar(*(z->p++));
}
int luaZ_lookahead (ZIO *z) {
if (z->n == 0) {
if (luaZ_fill(z) == EOZ)
return EOZ;
else {
z->n++; /* luaZ_fill removed first byte; put back it */
z->p--;
}
}
return char2int(*z->p);
} }
@ -58,8 +46,14 @@ void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader, void *data) {
size_t luaZ_read (ZIO *z, void *b, size_t n) { size_t luaZ_read (ZIO *z, void *b, size_t n) {
while (n) { while (n) {
size_t m; size_t m;
if (luaZ_lookahead(z) == EOZ) if (z->n == 0) { /* no bytes in buffer? */
return n; /* return number of missing bytes */ if (luaZ_fill(z) == EOZ) /* try to read more */
return n; /* no more input; return number of missing bytes */
else {
z->n++; /* luaZ_fill consumed first byte; put it back */
z->p--;
}
}
m = (n <= z->n) ? n : z->n; /* min. between n and z->n */ m = (n <= z->n) ? n : z->n; /* min. between n and z->n */
memcpy(b, z->p, m); memcpy(b, z->p, m);
z->n -= m; z->n -= m;

View file

@ -1,5 +1,5 @@
/* /*
** $Id$ ** $Id: lzio.h,v 1.26.1.1 2013/04/12 18:48:47 roberto Exp $
** Buffered streams ** Buffered streams
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -17,9 +17,8 @@
typedef struct Zio ZIO; typedef struct Zio ZIO;
#define char2int(c) cast(int, cast(unsigned char, (c))) #define zgetc(z) (((z)->n--)>0 ? cast_uchar(*(z)->p++) : luaZ_fill(z))
#define zgetc(z) (((z)->n--)>0 ? char2int(*(z)->p++) : luaZ_fill(z))
typedef struct Mbuffer { typedef struct Mbuffer {
char *buffer; char *buffer;
@ -47,7 +46,6 @@ LUAI_FUNC char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n);
LUAI_FUNC void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader, LUAI_FUNC void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader,
void *data); void *data);
LUAI_FUNC size_t luaZ_read (ZIO* z, void* b, size_t n); /* read next n bytes */ LUAI_FUNC size_t luaZ_read (ZIO* z, void* b, size_t n); /* read next n bytes */
LUAI_FUNC int luaZ_lookahead (ZIO *z);
@ -56,7 +54,7 @@ LUAI_FUNC int luaZ_lookahead (ZIO *z);
struct Zio { struct Zio {
size_t n; /* bytes still unread */ size_t n; /* bytes still unread */
const char *p; /* current position in buffer */ const char *p; /* current position in buffer */
lua_Reader reader; lua_Reader reader; /* reader function */
void* data; /* additional data */ void* data; /* additional data */
lua_State *L; /* Lua state (for reader) */ lua_State *L; /* Lua state (for reader) */
}; };

View file

@ -25,10 +25,6 @@
#include "plugin.h" #include "plugin.h"
#include <tlsf.h> #include <tlsf.h>
#undef LUAI_THROW
#undef LUAI_TRY
#undef luai_jmpbuf
#undef LUA_PATH_DEFAULT #undef LUA_PATH_DEFAULT
#define LUA_PATH_DEFAULT "$/?.lua;" "$/?/init.lua;" VIEWERS_DIR"/lua/?.lua;" VIEWERS_DIR"/lua/?/init.lua;" #define LUA_PATH_DEFAULT "$/?.lua;" "$/?/init.lua;" VIEWERS_DIR"/lua/?.lua;" VIEWERS_DIR"/lua/?/init.lua;"
@ -36,20 +32,11 @@
#include "lib/pluginlib_exit.h" #include "lib/pluginlib_exit.h"
#define LUAI_THROW(L,c) longjmp((c)->b, 1)
#define LUAI_TRY(L,c,a) if (setjmp((c)->b) == 0) { a }
#define luai_jmpbuf jmp_buf
extern char curpath[MAX_PATH]; extern char curpath[MAX_PATH];
struct tm *gmtime(const time_t *timep); struct tm *gmtime(const time_t *timep);
long strtol(const char *nptr, char **endptr, int base); long strtol(const char *nptr, char **endptr, int base);
unsigned long strtoul(const char *str, char **endptr, int base); unsigned long strtoul(const char *str, char **endptr, int base);
size_t strftime(char* dst, size_t max, const char* format, const struct tm* tm); size_t strftime(char* dst, size_t max, const char* format, const struct tm* tm);
long lfloor(long x);
long lpow(long x, long y);
#define floor lfloor
#define pow lpow
/* Simple substitutions */ /* Simple substitutions */
#define malloc tlsf_malloc #define malloc tlsf_malloc
@ -63,5 +50,17 @@ long lpow(long x, long y);
#define strcpy rb->strcpy #define strcpy rb->strcpy
#define strlen rb->strlen #define strlen rb->strlen
#define getlocaledecpoint() '.'
#define abort() exit(EXIT_FAILURE)
#define difftime(t1,t0) ((t1) - (t0))
#define localtime gmtime
#if CONFIG_RTC
#define time(x) mktime(rb->get_time())
#define mktime rb->mktime
#else
#define time(x) (0)
#define mktime(x) (0)
#endif
#endif /* _ROCKCONF_H_ */ #endif /* _ROCKCONF_H_ */

View file

@ -156,7 +156,19 @@ static int rli_tostring(lua_State *L)
return 1; return 1;
} }
static const struct luaL_reg rli_lib [] = int rli_checkboolean (lua_State *L, int narg) {
int b = lua_toboolean(L, narg);
if (b == 0)
luaL_checktype(L, narg, LUA_TBOOLEAN);
return b;
}
int rli_optboolean (lua_State *L, int narg, int def) {
return luaL_opt(L, rli_checkboolean, narg, def);
}
static const struct luaL_Reg rli_lib [] =
{ {
{"__tostring", rli_tostring}, {"__tostring", rli_tostring},
{"set", rli_set}, {"set", rli_set},
@ -472,8 +484,8 @@ RB_WRAP(read_bmp_file)
{ {
struct bitmap bm; struct bitmap bm;
const char* filename = luaL_checkstring(L, 1); const char* filename = luaL_checkstring(L, 1);
bool dither = luaL_optboolean(L, 2, true); bool dither = rli_optboolean(L, 2, true);
bool transparent = luaL_optboolean(L, 3, false); bool transparent = rli_optboolean(L, 3, false);
int format = FORMAT_NATIVE; int format = FORMAT_NATIVE;
if(dither) if(dither)
@ -516,7 +528,7 @@ static void fill_text_message(lua_State *L, struct text_message * message,
{ {
int i; int i;
luaL_checktype(L, pos, LUA_TTABLE); luaL_checktype(L, pos, LUA_TTABLE);
int n = luaL_getn(L, pos); int n = lua_rawlen(L, pos);
const char **lines = (const char**) tlsf_malloc(n * sizeof(const char*)); const char **lines = (const char**) tlsf_malloc(n * sizeof(const char*));
if(lines == NULL) if(lines == NULL)
luaL_error(L, "Can't allocate %d bytes!", n * sizeof(const char*)); luaL_error(L, "Can't allocate %d bytes!", n * sizeof(const char*));
@ -565,7 +577,7 @@ RB_WRAP(do_menu)
luaL_checktype(L, 2, LUA_TTABLE); luaL_checktype(L, 2, LUA_TTABLE);
start_selected = luaL_optint(L, 3, 0); start_selected = luaL_optint(L, 3, 0);
n = luaL_getn(L, 2); n = lua_rawlen(L, 2);
items = (const char**) tlsf_malloc(n * sizeof(const char*)); items = (const char**) tlsf_malloc(n * sizeof(const char*));
if(items == NULL) if(items == NULL)
luaL_error(L, "Can't allocate %d bytes!", n * sizeof(const char*)); luaL_error(L, "Can't allocate %d bytes!", n * sizeof(const char*));
@ -758,8 +770,9 @@ extern const luaL_Reg rocklib_aux[];
*/ */
LUALIB_API int luaopen_rock(lua_State *L) LUALIB_API int luaopen_rock(lua_State *L)
{ {
luaL_register(L, LUA_ROCKLIBNAME, rocklib); rli_init(L);
luaL_register(L, LUA_ROCKLIBNAME, rocklib_aux); luaL_newlib(L, rocklib);
luaL_setfuncs(L, rocklib_aux, 0);
RB_CONSTANT(HZ); RB_CONSTANT(HZ);
@ -797,7 +810,6 @@ LUALIB_API int luaopen_rock(lua_State *L)
RB_STRING_CONSTANT(PLUGIN_DATA_DIR); RB_STRING_CONSTANT(PLUGIN_DATA_DIR);
RB_STRING_CONSTANT(VIEWERS_DATA_DIR); RB_STRING_CONSTANT(VIEWERS_DATA_DIR);
rli_init(L);
return 1; return 1;
} }

View file

@ -25,6 +25,7 @@
#define LUA_ROCKLIBNAME "rb" #define LUA_ROCKLIBNAME "rb"
LUALIB_API int (luaopen_rock) (lua_State *L); LUALIB_API int (luaopen_rock) (lua_State *L);
const char* get_current_path(lua_State *L, int level); const char* get_current_path(lua_State *L, int level);
int rli_checkboolean (lua_State *L, int narg);
#endif /* _ROCKLIB_H_ */ #endif /* _ROCKLIB_H_ */

View file

@ -133,6 +133,7 @@ print <<EOF
#define _ROCKCONF_H_ /* We don't need strcmp() etc. wrappers */ #define _ROCKCONF_H_ /* We don't need strcmp() etc. wrappers */
#include "lua.h" #include "lua.h"
#include "rocklib.h"
#include "lauxlib.h" #include "lauxlib.h"
#include "plugin.h" #include "plugin.h"
@ -207,7 +208,7 @@ sub in_string
sub in_bool sub in_bool
{ {
my ($name, $type, $pos) = @_; my ($name, $type, $pos) = @_;
return sprintf("\tbool %s = luaL_checkboolean(L, %d);\n", $name, $pos) return sprintf("\tbool %s = rli_checkboolean(L, %d);\n", $name, $pos)
} }
sub out_void sub out_void

View file

@ -30,6 +30,7 @@
#include <errno.h> #include <errno.h>
#define PREFIX(_x_) sim_ ## _x_ #define PREFIX(_x_) sim_ ## _x_
#else #else
#undef errno
extern int errno; extern int errno;
#define EINVAL 22 /* Invalid argument */ #define EINVAL 22 /* Invalid argument */
#define ERANGE 34 /* Math result not representable */ #define ERANGE 34 /* Math result not representable */
@ -43,7 +44,8 @@ extern int errno;
#define memcmp rb->memcmp #define memcmp rb->memcmp
#define strlen rb->strlen #define strlen rb->strlen
extern int PREFIX(fscanf)(int fd, const char *fmt, ...); extern int PREFIX(fscanf)(void *fd, const char *fmt, ...);
extern int PREFIX(getc)(int fd);
#endif /* _ROCKLIBC_H_ */ #endif /* _ROCKLIBC_H_ */

View file

@ -26,7 +26,8 @@
#include "rocklib.h" #include "rocklib.h"
#include "luadir.h" #include "luadir.h"
#undef LUA_BITLIBNAME
#define LUA_BITLIBNAME "bit"
static const luaL_Reg lualibs[] = { static const luaL_Reg lualibs[] = {
{"", luaopen_base}, {"", luaopen_base},
@ -34,7 +35,7 @@ static const luaL_Reg lualibs[] = {
{LUA_STRLIBNAME, luaopen_string}, {LUA_STRLIBNAME, luaopen_string},
{LUA_OSLIBNAME, luaopen_os}, {LUA_OSLIBNAME, luaopen_os},
{LUA_ROCKLIBNAME, luaopen_rock}, {LUA_ROCKLIBNAME, luaopen_rock},
{LUA_BITLIBNAME, luaopen_bit}, {LUA_BITLIBNAME, luaopen_bit32},
{LUA_IOLIBNAME, luaopen_io}, {LUA_IOLIBNAME, luaopen_io},
{LUA_LOADLIBNAME, luaopen_package}, {LUA_LOADLIBNAME, luaopen_package},
{LUA_MATHLIBNAME, luaopen_math}, {LUA_MATHLIBNAME, luaopen_math},
@ -43,11 +44,10 @@ static const luaL_Reg lualibs[] = {
}; };
static void rocklua_openlibs(lua_State *L) { static void rocklua_openlibs(lua_State *L) {
const luaL_Reg *lib = lualibs; const luaL_Reg *lib;
for (; lib->func; lib++) { for (lib = lualibs; lib->func; lib++) {
lua_pushcfunction(L, lib->func); luaL_requiref(L, lib->name, lib->func, 1);
lua_pushstring(L, lib->name); lua_pop(L, 1); /* remove lib */
lua_call(L, 1, 0);
} }
} }

View file

@ -1,17 +0,0 @@
#include "rocklibc.h"
#undef strcspn
size_t strcspn(const char *s, const char *reject)
{
size_t l=0;
int a=1,i,al=strlen(reject);
while((a)&&(*s))
{
for(i=0;(a)&&(i<al);i++)
if (*s==reject[i]) a=0;
if (a) l++;
s++;
}
return l;
}

19
apps/plugins/lua/strspn.c Normal file
View file

@ -0,0 +1,19 @@
#include "rocklibc.h"
#undef strspn
size_t strspn(const char *s, const char *accept)
{
size_t count;
for (count = 0; *s != 0; s++, count++) {
const char *ac;
for (ac = accept; *ac != 0; ac++) {
if (*ac == *s)
break;
}
if (*ac == 0) /* no acceptable char found */
break;
}
return count;
}