87 lines
2.0 KiB
C
87 lines
2.0 KiB
C
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/************************************************************
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yyssssiz.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 "yacc.h"
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#ifdef YYPROTOTYPE
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int YYCDECL yysetstacksize(int size)
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#else
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int YYCDECL yysetstacksize(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 (yystack_size != size) {
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yystack_t YYFAR *stackptr;
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#if defined(__STDC__) || defined(__cplusplus)
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void YYFAR *attributestackptr;
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#else
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char YYFAR *attributestackptr;
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#endif
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size_t stackcharsize;
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size_t attributestackcharsize;
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if (size <= yytop) {
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return 0;
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}
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stackcharsize = size * sizeof(yystack_t);
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if ((int) (stackcharsize / sizeof(yystack_t)) != size) {
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return 0; /* integer overflow */
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}
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attributestackcharsize = size * yyattribute_size;
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if ((int) (attributestackcharsize / yyattribute_size) != size) {
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return 0; /* integer overflow */
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}
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/* allocate */
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if (size <= yysstack_size) {
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stackptr = yysstackptr;
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attributestackptr = yysattributestackptr;
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}
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else {
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stackptr = (yystack_t YYFAR *) malloc(stackcharsize);
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if (stackptr == NULL) {
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return 0;
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}
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attributestackptr = malloc(attributestackcharsize);
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if (attributestackptr == NULL) {
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free(stackptr); /* 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 (stackptr != yystackptr) {
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size_t charsize = yystack_size * sizeof(yystack_t);
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memcpy(stackptr, yystackptr, min(stackcharsize, charsize));
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}
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if (attributestackptr != yyattributestackptr) {
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size_t charsize = yystack_size * yyattribute_size;
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memcpy(attributestackptr, yyattributestackptr, min(attributestackcharsize,
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charsize));
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}
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/* free */
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if (yystackptr != yysstackptr) {
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free(yystackptr);
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}
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if (yyattributestackptr != yysattributestackptr) {
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free(yyattributestackptr);
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}
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/* assign */
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yystackptr = stackptr;
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yyattributestackptr = attributestackptr;
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yystack_size = size;
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}
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return 1;
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}
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