Initial commit

engines/glk/alan3/compatibility.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/alan3/compatibility.h"
+
+namespace Glk {
+namespace Alan3 {
+
+/*----------------------------------------------------------------------*/
+static bool is3_0Alpha(const byte version[]) {
+	return version[3] == 3 && version[2] == 0 && version[0] == 'a';
+}
+
+/*----------------------------------------------------------------------*/
+static bool is3_0Beta(const byte version[]) {
+	return version[3] == 3 && version[2] == 0 && version[0] == 'b';
+}
+
+/*----------------------------------------------------------------------*/
+static int correction(const byte version[]) {
+	return version[1];
+}
+
+/*======================================================================*/
+bool isPreAlpha5(const byte version[4]) {
+	return is3_0Alpha(version) && correction(version) < 5;
+}
+
+/*======================================================================*/
+bool isPreBeta2(const byte version[4]) {
+	return is3_0Alpha(version) || (is3_0Beta(version) && correction(version) == 1);
+}
+
+/*======================================================================*/
+bool isPreBeta3(const byte version[4]) {
+	return is3_0Alpha(version) || (is3_0Beta(version) && correction(version) <= 2);
+}
+
+/*======================================================================*/
+bool isPreBeta4(const byte version[4]) {
+	return is3_0Alpha(version) || (is3_0Beta(version) && correction(version) <= 3);
+}
+
+/*======================================================================*/
+bool isPreBeta5(const byte version[4]) {
+	return is3_0Alpha(version) || (is3_0Beta(version) && correction(version) <= 4);
+}
+
+} // End of namespace Alan3
+} // End of namespace Glk