Utils/Parser Generator/SOURCE/yysstsiz.c

@@ -0,0 +1,82 @@
+/************************************************************
+yysstsiz.c
+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 "lex.h"
+
+#ifdef YYPROTOTYPE
+int YYCDECL yysettextsize(int size)
+#else
+int YYCDECL yysettextsize(size)
+int size;
+#endif
+{
+	yyassert(size >= 0);
+	if (yytext_size != size) {
+		char YYFAR *text;
+		int YYFAR *statebuf;
+
+		size_t textcharsize;
+		size_t statebufcharsize;
+
+		if (size < yyleng) {
+			return 0;
+		}
+
+		textcharsize = size + 1;	/* include the '\0' */
+		if (textcharsize <= (size_t) size) {
+			return 0;		/* integer overflow */
+		}
+		statebufcharsize = size * sizeof(int);
+		if ((int) (statebufcharsize / sizeof(int)) != size) {
+			return 0;		/* integer overflow */
+		}
+
+		/* allocate */
+		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;
+}