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

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2000-12-08 21:40:33 +01:00
/************************************************************
yymunput.c
This file can be freely modified for the generation of
custom code.
Copyright (c) 1999 Bumble-Bee Software Ltd.
************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <limits.h>
#include "mlex.h"
#ifdef YYPROTOTYPE
void YYCDECL yymunput(yymlex_t YYFAR *yy, int ch)
#else
void YYCDECL yymunput(yy, ch)
yymlex_t YYFAR *yy;
int ch;
#endif
{
yyassert(yy != NULL);
yyassert(ch >= 0 && ch <= UCHAR_MAX || ch == EOF);
yyassert(yy->yymunputindex >= 0 && yy->yymunputindex <= yy->yymunput_size);
/* check unput buffer size */
if (yy->yymunputindex == yy->yymunput_size) {
do {
if (yy->yymunputgrow) {
if (yy->yymunput_size != 0) {
int size = yy->yymunput_size * 2;
if (size / 2 == yy->yymunput_size) { /* overflow check */
if (yymsetunputsize(yy, size)) {
break;
}
}
}
else {
if (yymsetunputsize(yy, 100)) {
break;
}
}
}
(*yy->yymunputoverflow)(yy);
exit(EXIT_FAILURE);
}
while (0);
}
yy->yymunputbufptr[yy->yymunputindex++] = ch;
/* check line number */
if (ch == '\n') {
yy->yymlineno--;
}
/* debugging */
#ifdef YYDEBUG
if (yydebug || yy->yymdebug) {
char string[128];
sprintf(string, "%p: unput: \'", (void *) yy);
yymlexdebugoutput(yy, string);
yymdebugoutput(yy, ch);
yymlexdebugoutput(yy, "\'\n");
}
#endif
}