/************************************************************
yycstsiz.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 "clex.h"

#ifndef min
#define min(x, y) ((x) <= (y) ? (x) : (y))
#endif

// the Visual C++ v1.52 compiler generates an error in NT if this isn't present!
#ifdef _MSC_VER
#if defined(M_I86HM) && defined(NDEBUG)
#pragma function(memcpy)
#endif
#endif

int yylexer::yysettextsize(int size)
{
	yyassert(size >= 0);
	if (yytext_size != size) {
		if (size < yyleng) {
			return 0;
		}

		size_t textcharsize = size + 1;	// include the '\0'
		if (textcharsize <= (size_t) size) {
			return 0;		// integer overflow
		}
		size_t statebufcharsize = size * sizeof(int);
		if ((int)(statebufcharsize / sizeof(int)) != size) {
			return 0;		// integer overflow
		}

		// allocate
		char YYFAR* text;
		int YYFAR* statebuf;
		if (size <= yystext_size) {
			text = yystext;
			statebuf = yysstatebuf;
		}
		else {
			text = (char YYFAR*)malloc(textcharsize);
			if (text == NULL) {
				return 0;
			}
			statebuf = (int YYFAR*)malloc(statebufcharsize);
			if (statebuf == NULL) {
				free(text);			// clean up
				return 0;
			}
		}

		// copy
		if (text != yytext) {
			size_t charsize = yytext_size + 1;
			memcpy(text, yytext, min(textcharsize, charsize));
		}
		if (statebuf != yystatebuf) {
			size_t charsize = yytext_size * sizeof(int);
			memcpy(statebuf, yystatebuf, min(statebufcharsize, charsize));
		}

		// free
		if (yytext != yystext) {
			free(yytext);
		}
		if (yystatebuf != yysstatebuf) {
			free(yystatebuf);
		}

		// assign
		yytext = text;
		yystatebuf = statebuf;
		yytext_size = size;
	}
	return 1;
}