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Use flex's YY_USER_ACTION feature to avoid code duplication

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Current, every lexer rule starts with some boiler plate to update the
yylloc value for use by the parser.  One of the rules, even mistakenly
has a redundant allocation to one of the members.

This patch uses the flex YY_USER_ACTION macro hook, which is executed
before every rule to avoid this duplication.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Jon Loeliger 2008-10-03 11:46:43 -05:00
parent 879e4d2590
commit 83ac55d9c4
1 changed files with 5 additions and 31 deletions
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36
dtc-lexer.l
View file

@ -38,6 +38,11 @@ LINECOMMENT "//".*\n
#include "srcpos.h"
#include "dtc-parser.tab.h"
#define YY_USER_ACTION \
{ \
yylloc.file = srcpos_file; \
yylloc.first_line = yylineno; \
}
/*#define LEXDEBUG 1*/
@ -75,18 +80,13 @@ static int pop_input_file(void);
}
<*>{STRING} {
yylloc.file = srcpos_file;
yylloc.first_line = yylineno;
DPRINT("String: %s\n", yytext);
yylval.data = data_copy_escape_string(yytext+1,
yyleng-2);
yylloc.first_line = yylineno;
return DT_STRING;
}
<*>"/dts-v1/" {
yylloc.file = srcpos_file;
yylloc.first_line = yylineno;
DPRINT("Keyword: /dts-v1/\n");
dts_version = 1;
BEGIN_DEFAULT();
@ -94,16 +94,12 @@ static int pop_input_file(void);
}
<*>"/memreserve/" {
yylloc.file = srcpos_file;
yylloc.first_line = yylineno;
DPRINT("Keyword: /memreserve/\n");
BEGIN_DEFAULT();
return DT_MEMRESERVE;
}
<*>{LABEL}: {
yylloc.file = srcpos_file;
yylloc.first_line = yylineno;
DPRINT("Label: %s\n", yytext);
yylval.labelref = xstrdup(yytext);
yylval.labelref[yyleng-1] = '\0';
@ -111,8 +107,6 @@ static int pop_input_file(void);
}
<INITIAL>[bodh]# {
yylloc.file = srcpos_file;
yylloc.first_line = yylineno;
if (*yytext == 'b')
yylval.cbase = 2;
else if (*yytext == 'o')
@ -126,32 +120,24 @@ static int pop_input_file(void);
}
<INITIAL>[0-9a-fA-F]+ {
yylloc.file = srcpos_file;
yylloc.first_line = yylineno;
yylval.literal = xstrdup(yytext);
DPRINT("Literal: '%s'\n", yylval.literal);
return DT_LEGACYLITERAL;
}
<V1>[0-9]+|0[xX][0-9a-fA-F]+ {
yylloc.file = srcpos_file;
yylloc.first_line = yylineno;
yylval.literal = xstrdup(yytext);
DPRINT("Literal: '%s'\n", yylval.literal);
return DT_LITERAL;
}
\&{LABEL} { /* label reference */
yylloc.file = srcpos_file;
yylloc.first_line = yylineno;
DPRINT("Ref: %s\n", yytext+1);
yylval.labelref = xstrdup(yytext+1);
return DT_REF;
}
"&{/"{PATHCHAR}+\} { /* new-style path reference */
yylloc.file = srcpos_file;
yylloc.first_line = yylineno;
yytext[yyleng-1] = '\0';
DPRINT("Ref: %s\n", yytext+2);
yylval.labelref = xstrdup(yytext+2);
@ -159,32 +145,24 @@ static int pop_input_file(void);
}
<INITIAL>"&/"{PATHCHAR}+ { /* old-style path reference */
yylloc.file = srcpos_file;
yylloc.first_line = yylineno;
DPRINT("Ref: %s\n", yytext+1);
yylval.labelref = xstrdup(yytext+1);
return DT_REF;
}
<BYTESTRING>[0-9a-fA-F]{2} {
yylloc.file = srcpos_file;
yylloc.first_line = yylineno;
yylval.byte = strtol(yytext, NULL, 16);
DPRINT("Byte: %02x\n", (int)yylval.byte);
return DT_BYTE;
}
<BYTESTRING>"]" {
yylloc.file = srcpos_file;
yylloc.first_line = yylineno;
DPRINT("/BYTESTRING\n");
BEGIN_DEFAULT();
return ']';
}
<PROPNODENAME>{PROPNODECHAR}+ {
yylloc.file = srcpos_file;
yylloc.first_line = yylineno;
DPRINT("PropNodeName: %s\n", yytext);
yylval.propnodename = xstrdup(yytext);
BEGIN_DEFAULT();
@ -192,8 +170,6 @@ static int pop_input_file(void);
}
"/incbin/" {
yylloc.file = srcpos_file;
yylloc.first_line = yylineno;
DPRINT("Binary Include\n");
return DT_INCBIN;
}
@ -203,8 +179,6 @@ static int pop_input_file(void);
<*>{LINECOMMENT}+ /* eat C++-style comments */
<*>. {
yylloc.file = srcpos_file;
yylloc.first_line = yylineno;
DPRINT("Char: %c (\\x%02x)\n", yytext[0],
(unsigned)yytext[0]);
if (yytext[0] == '[') {