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engines/glk/alan2/rules.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "glk/alan2/types.h"
+#include "glk/alan2/debug.h"
+#include "glk/alan2/exe.h"
+#include "glk/alan2/inter.h"
+#include "glk/alan2/glkio.h"
+#include "glk/alan2/main.h"
+#include "glk/alan2/rules.h"
+#include "glk/alan2/stack.h"
+
+namespace Glk {
+namespace Alan2 {
+
+void rules() {
+	Boolean change = TRUE;
+	int i;
+
+	for (i = 1; !endOfTable(&ruls[i - 1]); i++)
+		ruls[i - 1].run = FALSE;
+
+	while (change) {
+		change = FALSE;
+		for (i = 1; !endOfTable(&ruls[i - 1]); i++)
+			if (!ruls[i - 1].run) {
+				if (trcflg) {
+					printf("\n<RULE %d (at ", i);
+					debugsay(cur.loc);
+					if (!stpflg)
+						printf("), Evaluating");
+					else
+						printf("), Evaluating:>\n");
+				}
+				interpret(ruls[i - 1].exp);
+				if (pop()) {
+					change = TRUE;
+					ruls[i - 1].run = TRUE;
+					if (trcflg) {
+						if (!stpflg)
+							printf(", Executing:>\n");
+						else {
+							printf("\nRULE %d (at ", i);
+							debugsay(cur.loc);
+							printf("), Executing:>\n");
+						}
+					}
+
+					interpret(ruls[i - 1].stms);
+				} else if (trcflg && !stpflg)
+					printf(":>\n");
+			}
+	}
+}
+
+} // End of namespace Alan2
+} // End of namespace Glk