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

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2000-12-08 21:40:33 +01:00
/************************************************************
yyclcrea.cpp
This file can be freely modified for the generation of
custom code.
Copyright (c) 1999 Bumble-Bee Software Ltd.
************************************************************/
#include "clex.h"
#include <stdlib.h>
int yylexer::yycreate(yyparser YYFAR* parserptr)
{
yyparserptr = parserptr;
size_t textcharsize;
size_t statebufcharsize;
size_t unputbufcharsize;
// get sizes first
textcharsize = yystext_size + 1; // include the '\0'
if (textcharsize <= (size_t)yystext_size) {
return 0; // integer overflow
}
if (yystext_size != 0) {
statebufcharsize = yystext_size * sizeof(int);
if ((int)(statebufcharsize / sizeof(int)) != yystext_size) {
return 0; // integer overflow
}
}
else {
statebufcharsize = 0;
}
if (yysunput_size != 0) {
unputbufcharsize = yysunput_size * sizeof(int);
if ((int)(unputbufcharsize / sizeof(int)) != yysunput_size) {
return 0; // integer overflow
}
}
else {
unputbufcharsize = 0;
}
// allocate the memory if necessary
yystext = (char YYFAR*)malloc(textcharsize);
if (yystext == NULL) {
return 0;
}
if (statebufcharsize != 0) {
yysstatebuf = (int YYFAR*)malloc(statebufcharsize);
if (yysstatebuf == NULL) {
free(yystext);
return 0;
}
}
else {
yysstatebuf = NULL;
}
if (unputbufcharsize != 0) {
yysunputbufptr = (int YYFAR*)malloc(unputbufcharsize);
if (yysunputbufptr == NULL) {
free(yystext);
free(yysstatebuf);
return 0;
}
}
else {
yysunputbufptr = NULL;
}
// assign any other variables
yytext_size = yystext_size;
yytext = yystext;
yystatebuf = yysstatebuf;
yyunput_size = yysunput_size;
yyunputbufptr = yysunputbufptr;
// makes sure we are ready to go
yyreset();
return 1;
}