Utils/Parser Generator/SOURCE/yymsssiz.c

@@ -0,0 +1,88 @@
+/************************************************************
+yymsssiz.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 "myacc.h"
+
+#ifdef YYPROTOTYPE
+int YYCDECL yymsetstacksize(yymparse_t YYFAR *yy, int size)
+#else
+int YYCDECL yymsetstacksize(yy, size)
+yymparse_t YYFAR *yy;
+int size;
+#endif
+{
+	yyassert(yy != NULL);
+	yyassert(size >= 0);
+	if (yy->yymstack_size != size) {
+		yystack_t YYFAR *stackptr;
+#if defined(__STDC__) || defined(__cplusplus)
+		void YYFAR *attributestackptr;
+#else
+		char YYFAR *attributestackptr;
+#endif
+		size_t stackcharsize;
+		size_t attributestackcharsize;
+
+		if (size <= yy->yymtop) {
+			return 0;
+		}
+
+		stackcharsize = size * sizeof(yystack_t);
+		if ((int) (stackcharsize / sizeof(yystack_t)) != size) {
+			return 0;		/* integer overflow */
+		}
+		attributestackcharsize = size * yy->yymattribute_size;
+		if ((int) (attributestackcharsize / yy->yymattribute_size) != size) {
+			return 0;		/* integer overflow */
+		}
+
+		/* allocate */
+		if (size <= yy->yymsstack_size) {
+			stackptr = yy->yymsstackptr;
+			attributestackptr = yy->yymsattributestackptr;
+		}
+		else {
+			stackptr = (yystack_t YYFAR *) malloc(stackcharsize);
+			if (stackptr == NULL) {
+				return 0;
+			}
+			attributestackptr = malloc(attributestackcharsize);
+			if (attributestackptr == NULL) {
+				free(stackptr);		/* clean up */
+				return 0;
+			}
+		}
+
+		/* copy */
+		if (stackptr != yy->yymstackptr) {
+			size_t charsize = yy->yymstack_size * sizeof(yystack_t);
+			memcpy(stackptr, yy->yymstackptr, min(stackcharsize, charsize));
+		}
+		if (attributestackptr != yy->yymattributestackptr) {
+			size_t charsize = yy->yymstack_size * yy->yymattribute_size;
+			memcpy(attributestackptr, yy->yymattributestackptr, min(attributestackcharsize,
+				charsize));
+		}
+
+		/* free */
+		if (yy->yymstackptr != yy->yymsstackptr) {
+			free(yy->yymstackptr);
+		}
+		if (yy->yymattributestackptr != yy->yymsattributestackptr) {
+			free(yy->yymattributestackptr);
+		}
+
+		/* assign */
+		yy->yymstackptr = stackptr;
+		yy->yymattributestackptr = attributestackptr;
+		yy->yymstack_size = size;
+	}
+	return 1;
+}