Utils/Parser Generator/SOURCE/yycstsiz.cpp

@@ -0,0 +1,84 @@
+/************************************************************
+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;
+}