SBSPSS/Utils/Parser Generator/SOURCE/yyssssiz.c

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2000-12-08 21:40:33 +01:00
/************************************************************
yyssssiz.c
This file can be freely modified for the generation of
custom code.
Copyright (c) 1999 Bumble-Bee Software Ltd.
************************************************************/
#include <stdlib.h>
#include <string.h>
#include "yacc.h"
#ifdef YYPROTOTYPE
int YYCDECL yysetstacksize(int size)
#else
int YYCDECL yysetstacksize(size)
int size;
#endif
{
yyassert(size >= 0);
if (yystack_size != size) {
yystack_t YYFAR *stackptr;
#if defined(__STDC__) || defined(__cplusplus)
void YYFAR *attributestackptr;
#else
char YYFAR *attributestackptr;
#endif
size_t stackcharsize;
size_t attributestackcharsize;
if (size <= yytop) {
return 0;
}
stackcharsize = size * sizeof(yystack_t);
if ((int) (stackcharsize / sizeof(yystack_t)) != size) {
return 0; /* integer overflow */
}
attributestackcharsize = size * yyattribute_size;
if ((int) (attributestackcharsize / yyattribute_size) != size) {
return 0; /* integer overflow */
}
/* allocate */
if (size <= yysstack_size) {
stackptr = yysstackptr;
attributestackptr = yysattributestackptr;
}
else {
stackptr = (yystack_t YYFAR *) malloc(stackcharsize);
if (stackptr == NULL) {
return 0;
}
attributestackptr = malloc(attributestackcharsize);
if (attributestackptr == NULL) {
free(stackptr); /* clean up */
return 0;
}
}
/* copy */
if (stackptr != yystackptr) {
size_t charsize = yystack_size * sizeof(yystack_t);
memcpy(stackptr, yystackptr, min(stackcharsize, charsize));
}
if (attributestackptr != yyattributestackptr) {
size_t charsize = yystack_size * yyattribute_size;
memcpy(attributestackptr, yyattributestackptr, min(attributestackcharsize,
charsize));
}
/* free */
if (yystackptr != yysstackptr) {
free(yystackptr);
}
if (yyattributestackptr != yysattributestackptr) {
free(yyattributestackptr);
}
/* assign */
yystackptr = stackptr;
yyattributestackptr = attributestackptr;
yystack_size = size;
}
return 1;
}