65 lines
1.4 KiB
C
65 lines
1.4 KiB
C
/************************************************************
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yymsusiz.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 "mlex.h"
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#ifdef YYPROTOTYPE
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int YYCDECL yymsetunputsize(yymlex_t YYFAR *yy, int size)
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#else
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int YYCDECL yymsetunputsize(yy, size)
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yymlex_t YYFAR *yy;
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int size;
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#endif
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{
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yyassert(yy != NULL);
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yyassert(size >= 0);
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if (yy->yymunput_size != size) {
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int YYFAR *unputbufptr;
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size_t unputbufcharsize;
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if (size < yy->yymunputindex) {
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return 0;
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}
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unputbufcharsize = size * sizeof(int);
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if ((int) (unputbufcharsize / 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 <= yy->yymsunput_size) {
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unputbufptr = yy->yymsunputbufptr;
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}
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else {
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unputbufptr = (int YYFAR *) malloc(unputbufcharsize);
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if (unputbufptr == NULL) {
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return 0;
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}
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}
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/* copy */
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if (unputbufptr != yy->yymunputbufptr) {
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size_t charsize = yy->yymunput_size * sizeof(int);
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memcpy(unputbufptr, yy->yymunputbufptr, min(unputbufcharsize, charsize));
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}
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/* free */
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if (yy->yymunputbufptr != yy->yymsunputbufptr) {
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free(yy->yymunputbufptr);
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}
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/* assign */
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yy->yymunputbufptr = unputbufptr;
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yy->yymunput_size = size;
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}
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return 1;
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}
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