Utils/Parser Generator/SOURCE/yycpush.cpp

@@ -0,0 +1,98 @@
+/************************************************************
+yycpush.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"
+
+int yyparser::yypush(yystack_t state)
+{
+	yytop++;		// increment first
+	if (yytop == yystack_size) {
+		do {
+			if (yystackgrow) {
+				if (yystack_size != 0) {
+					int size = yystack_size * 2;
+					if (size / 2 == yystack_size) {		// overflow check
+						if (yysetstacksize(size)) {
+							break;
+						}
+					}
+				}
+				else {
+					if (yysetstacksize(100)) {
+						break;
+					}
+				}
+			}
+			yytop--;
+
+			// debugging
+#ifdef YYDEBUG
+			if (::yydebug || yydebug) {
+				char string[128];
+
+				sprintf(string, "%p: stack overflow\n", (void*)this);
+				yydebugoutput(string);
+			}
+#endif
+
+			yystackoverflow();
+			return 0;
+		}
+		while (0);
+	}
+	yystackptr[yytop] = state;
+
+	// debugging
+#ifdef YYDEBUG
+	if (::yydebug || yydebug) {
+		char string[128];
+
+		sprintf(string, "%p: push state %d", (void*)this, (int)state);
+		yydebugoutput(string);
+		if (yytop > 0) {
+			sprintf(string, " covering state %d", (int)yystackptr[yytop - 1]);
+			yydebugoutput(string);
+		}
+		yydebugoutput("\n");
+
+		// output stack contents
+		if (::yydebugstack || yydebugstack) {
+			yydebugoutput("\nstack");
+			int n = sprintf(string, "\n     +");
+			int i;
+			for (i = 0; i < 10; i++) {
+				n += sprintf(&string[n], " %5d", (int) i);
+			}
+			yydebugoutput(string);
+
+			int rows = 1;
+			if (yytop >= 0) {
+				rows += yytop / 10;
+			}
+			for (i = 0; i < rows; i++) {
+				n = sprintf(string, "\n %5d", (int) (10 * i));
+				for (int j = 0; j < 10; j++) {
+					int index = 10 * i + j;
+					if (index <= yytop) {
+						n += sprintf(&string[n], " %5d", (int) yystackptr[index]);
+					}
+					else {
+						n += sprintf(&string[n], "     -");
+					}
+				}
+				yydebugoutput(string);
+			}
+			yydebugoutput("\n\n");
+		}
+	}
+#endif
+
+	return 1;
+}