SBSPSS/Utils/Parser Generator/SOURCE/yycpush.cpp

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2000-12-08 21:40:33 +01:00
/************************************************************
yycpush.cpp
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 "cyacc.h"
int yyparser::yypush(yystack_t state)
{
yytop++; // increment first
if (yytop == yystack_size) {
do {
if (yystackgrow) {
if (yystack_size != 0) {
int size = yystack_size * 2;
if (size / 2 == yystack_size) { // overflow check
if (yysetstacksize(size)) {
break;
}
}
}
else {
if (yysetstacksize(100)) {
break;
}
}
}
yytop--;
// debugging
#ifdef YYDEBUG
if (::yydebug || yydebug) {
char string[128];
sprintf(string, "%p: stack overflow\n", (void*)this);
yydebugoutput(string);
}
#endif
yystackoverflow();
return 0;
}
while (0);
}
yystackptr[yytop] = state;
// debugging
#ifdef YYDEBUG
if (::yydebug || yydebug) {
char string[128];
sprintf(string, "%p: push state %d", (void*)this, (int)state);
yydebugoutput(string);
if (yytop > 0) {
sprintf(string, " covering state %d", (int)yystackptr[yytop - 1]);
yydebugoutput(string);
}
yydebugoutput("\n");
// output stack contents
if (::yydebugstack || yydebugstack) {
yydebugoutput("\nstack");
int n = sprintf(string, "\n +");
int i;
for (i = 0; i < 10; i++) {
n += sprintf(&string[n], " %5d", (int) i);
}
yydebugoutput(string);
int rows = 1;
if (yytop >= 0) {
rows += yytop / 10;
}
for (i = 0; i < rows; i++) {
n = sprintf(string, "\n %5d", (int) (10 * i));
for (int j = 0; j < 10; j++) {
int index = 10 * i + j;
if (index <= yytop) {
n += sprintf(&string[n], " %5d", (int) yystackptr[index]);
}
else {
n += sprintf(&string[n], " -");
}
}
yydebugoutput(string);
}
yydebugoutput("\n\n");
}
}
#endif
return 1;
}