Utils/Parser Generator/SOURCE/yyspush.c

@@ -0,0 +1,104 @@
+/************************************************************
+yyspush.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 "yacc.h"
+
+#ifdef YYPROTOTYPE
+int YYCDECL yypush(yystack_t state)
+#else
+int YYCDECL yypush(state)
+yystack_t state;
+#endif
+{
+	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 || yyparsedebug) {
+				yyparsedebugoutput("stack overflow\n");
+			}
+#endif
+
+			yystackoverflow();
+			return 0;
+		}
+		while (0);
+	}
+	yystackptr[yytop] = state;
+
+	/* debugging */
+#ifdef YYDEBUG
+	if (yydebug || yyparsedebug) {
+		char string[128];
+
+		sprintf(string, "push state %d", (int) state);
+		yyparsedebugoutput(string);
+		if (yytop > 0) {
+			sprintf(string, " covering state %d", (int) yystackptr[yytop - 1]);
+			yyparsedebugoutput(string);
+		}
+		yyparsedebugoutput("\n");
+
+		/* output stack contents */
+		if (yydebugstack || yyparsedebugstack) {
+			int rows;
+			int i;
+			int n;
+
+			yyparsedebugoutput("\nstack");
+			n = sprintf(string, "\n     +");
+			for (i = 0; i < 10; i++) {
+				n += sprintf(&string[n], " %5d", (int) i);
+			}
+			yyparsedebugoutput(string);
+
+			rows = 1;
+			if (yytop >= 0) {
+				rows += yytop / 10;
+			}
+			for (i = 0; i < rows; i++) {
+				int j;
+				n = sprintf(string, "\n %5d", (int) (10 * i));
+				for (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], "     -");
+					}
+				}
+				yyparsedebugoutput(string);
+			}
+			yyparsedebugoutput("\n\n");
+		}
+	}
+#endif
+
+	return 1;
+}