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lua inbinary strings

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Allows saving of ram by reusing strings already stored in the binary
and storing a pointer instead of malloc and copy to get them inside
the lua state

Saves about 1.5K overall

Derivative of work by bogdanm
RAM optimizations: pseudo RO strings, functions in Flash
d54659b572

Change-Id: I21d6dcfa32523877efd9f70fb0f88f2a02872649
This commit is contained in:
William Wilgus 2018-11-11 18:27:19 -05:00
parent 42240f6990
commit c6fcb1cf45
10 changed files with 88 additions and 25 deletions
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23
apps/plugins/lua/lstring.h
View file

@ -12,20 +12,29 @@
#include "lobject.h"
#include "lstate.h"
#define sizestring(s) (sizeof(union TString)+((s)->len+1)*sizeof(char))
/* ROCKLUA ADDED */
#define TSTR_INBLOB 0 /* string will be allocated at end of tstring struct */
#define TSTR_INBIN 1 /* string is static within binary, pointer stored */
#define TSTR_FIXED 2 /* string won't be collected for duration of L state */
#define TSTR_CHKSZ 4 /* luaS_newllocstr shall determine size of string */
#define TSTR_ISLIT 8 | TSTR_INBIN /* literal string static within binary */
#define sizetstring(t, l) (sizeof(union TString) + (testbits((t), TSTR_INBIN) ? \
sizeof(const char **) : ((l)+1)*sizeof(char)))
#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, \
(sizeof(s)/sizeof(char))-1))
#define luaS_new(L, s) (luaS_newllocstr(L, s, 0, TSTR_INBLOB | TSTR_CHKSZ))
#define luaS_newlstr(L, s, len) (luaS_newllocstr(L, s, len, TSTR_INBLOB))
#define luaS_newlloc(L, s, t) (luaS_newllocstr(L, s, 0, ((t) | TSTR_CHKSZ)))
#define luaS_newliteral(L, s) (luaS_newllocstr(L, "" s, \
(sizeof(s)/sizeof(char))-1, TSTR_ISLIT))
#define luaS_fix(s) l_setbit((s)->tsv.marked, FIXEDBIT)
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 TString *luaS_newlstr (lua_State *L, const char *str, size_t l);
/* ROCKLUA ADDED */
LUAI_FUNC TString *luaS_newllocstr (lua_State *L,
const char *str, size_t l, char type);
#endif