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Support #line directives

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This commit is contained in:
Keith Packard 2008-04-11 11:04:42 -07:00 committed by Damien Lespiau
parent b81aca4948
commit 082fbe8738
1 changed files with 21 additions and 5 deletions
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26
assembler/src/lex.l
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@ -5,9 +5,12 @@
#include "brw_defines.h"
int saved_state = 0;
extern char *input_filename;
%}
%x BLOCK_COMMENT
%x LINENUMBER
%x FILENAME
%%
\/\/.*[\r\n] { } /* eat up single-line comments */
@ -22,7 +25,21 @@ int saved_state = 0;
}
<BLOCK_COMMENT>. { }
<BLOCK_COMMENT>[\r\n] { }
"#line"" "* {
saved_state = YYSTATE;
BEGIN(LINENUMBER);
}
<LINENUMBER>[0-9]+" "* {
yylineno = atoi (yytext) - 1;
BEGIN(FILENAME);
}
<FILENAME>\"[^\"]+\" {
char *name = malloc (yyleng - 1);
memmove (name, yytext + 1, yyleng - 2);
name[yyleng-1] = '\0';
input_filename = name;
BEGIN(saved_state);
}
/* used for both null send and null register. */
"null" { return NULL_TOKEN; }
@ -311,10 +328,9 @@ int saved_state = 0;
[ \t\n]+ { } /* eat up whitespace */
. {
printf("parse error at line %d: unexpected \"%s\"\n",
yylineno, yytext);
exit(1);
}
fprintf(stderr, "%s: %d: %s at \"%s\"\n",
input_filename, yylineno, "unexpected token", lex_text());
}
%%
char *