Initial commit

engines/glk/jumps.h

@@ -0,0 +1,81 @@
+/* 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/>.
+ *
+ */
+
+#ifndef GLK_JUMPS
+#define GLK_JUMPS
+
+#include "common/str.h"
+
+/* This provides a simplified version of the ScummVM coroutines to allow for automated
+ * breakouts to the main game loop from subroutinese rather than using unportable setjmps
+ */
+
+namespace Glk {
+
+/**
+ * Context used for flagging when a break to the outer game loop
+ */
+struct Context {
+	bool _break;
+	Common::String _label;
+
+	Context() : _break(false) {}
+
+	/**
+	 * Clear the context
+	 */
+	void clear() {
+		_break = false;
+		_label = "";
+	}
+};
+
+#define CALL0(METHOD) { METHOD(context); if (context._break) return; }
+#define CALL1(METHOD, P1) { METHOD(context, P1); if (context._break) return; }
+#define CALL2(METHOD, P1, P2) { METHOD(context, P1, P2); if (context._break) return; }
+#define CALL3(METHOD, P1, P2, P3) { METHOD(context, P1, P2, P3); if (context._break) return; }
+#define CALL4(METHOD, P1, P2, P3, P4) { METHOD(context, P1, P2, P3, P4); if (context._break) return; }
+#define FUNC0(METHOD, RET) { RET = METHOD(context); if (context._break) return; }
+#define FUNC1(METHOD, RET, P1) { RET = METHOD(context, P1); if (context._break) return; }
+#define FUNC2(METHOD, RET, P1, P2) { RET = METHOD(context, P1, P2); if (context._break) return; }
+#define FUNC3(METHOD, RET, P1, P2, P3) { RET = METHOD(context, P1, P2, P3); if (context._break) return; }
+#define FUNC4(METHOD, RET, P1, P2, P3, P4) { RET = METHOD(context, P1, P2, P3, P4); if (context._break) return; }
+
+#define R0CALL0(METHOD) { METHOD(context); if (context._break) return 0; }
+#define R0CALL1(METHOD, P1) { METHOD(context, P1); if (context._break) return 0; }
+#define R0CALL2(METHOD, P1, P2) { METHOD(context, P1, P2); if (context._break) return 0; }
+#define R0CALL3(METHOD, P1, P2, P3) { METHOD(context, P1, P2, P3); if (context._break) return 0; }
+#define R0CALL4(METHOD, P1, P2, P3, P4) { METHOD(context, P1, P2, P3, P4); if (context._break) return 0; }
+#define R0FUNC0(METHOD, RET) { RET = METHOD(context); if (context._break) return 0; }
+#define R0FUNC1(METHOD, RET, P1) { RET = METHOD(context, P1); if (context._break) return 0; }
+#define R0FUNC2(METHOD, RET, P1, P2) { RET = METHOD(context, P1, P2); if (context._break) return 0; }
+#define R0FUNC3(METHOD, RET, P1, P2, P3) { RET = METHOD(context, P1, P2, P3); if (context._break) return 0; }
+#define R0FUNC4(METHOD, RET, P1, P2, P3, P4) { RET = METHOD(context, P1, P2, P3, P4); if (context._break) return 0; }
+
+#define CONTEXT Context &context
+#define LONG_JUMP { context._break = true; return; }
+#define LONG_JUMP0 { context._break = true; return 0; }
+#define LONG_JUMP_LABEL(LBL) { context._break = true; context._label = LBL; return; }
+#define LONG_JUMP_LABEL0(LBL) { context._break = true; context._label = LBL; return 0; }
+
+} // End of namespace Glk
+
+#endif