83 lines
1.7 KiB
C
83 lines
1.7 KiB
C
/************************************************************
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yysstsiz.c
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This file can be freely modified for the generation of
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custom code.
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Copyright (c) 1999 Bumble-Bee Software Ltd.
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************************************************************/
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#include <stdlib.h>
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#include <string.h>
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#include "lex.h"
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#ifdef YYPROTOTYPE
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int YYCDECL yysettextsize(int size)
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#else
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int YYCDECL yysettextsize(size)
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int size;
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#endif
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{
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yyassert(size >= 0);
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if (yytext_size != size) {
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char YYFAR *text;
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int YYFAR *statebuf;
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size_t textcharsize;
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size_t statebufcharsize;
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if (size < yyleng) {
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return 0;
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}
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textcharsize = size + 1; /* include the '\0' */
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if (textcharsize <= (size_t) size) {
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return 0; /* integer overflow */
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}
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statebufcharsize = size * sizeof(int);
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if ((int) (statebufcharsize / sizeof(int)) != size) {
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return 0; /* integer overflow */
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}
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/* allocate */
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if (size <= yystext_size) {
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text = yystext;
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statebuf = yysstatebuf;
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}
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else {
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text = (char YYFAR *) malloc(textcharsize);
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if (text == NULL) {
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return 0;
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}
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statebuf = (int YYFAR *) malloc(statebufcharsize);
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if (statebuf == NULL) {
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free(text); /* clean up */
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return 0;
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}
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}
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/* copy */
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if (text != yytext) {
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size_t charsize = yytext_size + 1;
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memcpy(text, yytext, min(textcharsize, charsize));
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}
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if (statebuf != yystatebuf) {
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size_t charsize = yytext_size * sizeof(int);
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memcpy(statebuf, yystatebuf, min(statebufcharsize, charsize));
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}
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/* free */
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if (yytext != yystext) {
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free(yytext);
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}
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if (yystatebuf != yysstatebuf) {
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free(yystatebuf);
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}
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/* assign */
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yytext = text;
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yystatebuf = statebuf;
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yytext_size = size;
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}
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return 1;
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}
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