Utils/Parser Generator/SOURCE/yycsssiz.cpp

@@ -0,0 +1,85 @@
+/************************************************************
+yycsssiz.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 "cyacc.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 yyparser::yysetstacksize(int size)
+{
+	yyassert(size >= 0);
+	if (yystack_size != size) {
+		if (size <= yytop) {
+			return 0;
+		}
+
+		size_t stackcharsize = size * sizeof(yystack_t);
+		if ((int)(stackcharsize / sizeof(yystack_t)) != size) {
+			return 0;		// integer overflow
+		}
+		size_t attributestackcharsize = size * yyattribute_size;
+		if ((int)(attributestackcharsize / yyattribute_size) != size) {
+			return 0;		// integer overflow
+		}
+
+		// allocate
+		yystack_t YYFAR* stackptr;
+		void YYFAR* attributestackptr;
+		if (size <= yysstack_size) {
+			stackptr = yysstackptr;
+			attributestackptr = yysattributestackptr;
+		}
+		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 != yystackptr) {
+			size_t charsize = yystack_size * sizeof(yystack_t);
+			memcpy(stackptr, yystackptr, min(stackcharsize, charsize));
+		}
+		if (attributestackptr != yyattributestackptr) {
+			size_t charsize = yystack_size * yyattribute_size;
+			memcpy(attributestackptr, yyattributestackptr, min(attributestackcharsize,
+				charsize));
+		}
+
+		// free
+		if (yystackptr != yysstackptr) {
+			free(yystackptr);
+		}
+		if (yyattributestackptr != yysattributestackptr) {
+			free(yyattributestackptr);
+		}
+
+		// assign
+		yystackptr = stackptr;
+		yyattributestackptr = attributestackptr;
+		yystack_size = size;
+	}
+	return 1;
+}