add initial support for 'Bud Tucker in Double Trouble'

svn-id: r34990

1 files changed, 116 insertions, 0 deletions

diff --git a/engines/tucker/saveload.cpp b/engines/tucker/saveload.cpp
new file mode 100644
index 0000000000..145c86ef18
--- /dev/null
+++ b/engines/tucker/saveload.cpp
@@ -0,0 +1,116 @@
+/* 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#include "common/savefile.h"
+
+#include "tucker/tucker.h"
+
+namespace Tucker {
+
+enum {
+	kCurrentGameStateVersion = 1
+};
+
+void TuckerEngine::generateGameStateFileName(int num, char *dst, int len, bool prefixOnly) const {
+	if (prefixOnly) {
+		snprintf(dst, len, "%s.*", _targetName.c_str());
+	} else {
+		snprintf(dst, len, "%s.%d", _targetName.c_str(), num);
+	}
+	dst[len] = 0;
+}
+
+static void saveOrLoadInt(Common::WriteStream &stream, int &i) {
+	stream.writeSint32LE(i);
+}
+
+static void saveOrLoadInt(Common::ReadStream &stream, int &i) {
+	i = stream.readSint32LE();
+}
+
+template <class S>
+void TuckerEngine::saveOrLoadGameStateData(S &s) {
+	for (int i = 0; i < 300; ++i) {
+		saveOrLoadInt(s, _flagsTable[i]);
+	}
+	for (int i = 0; i < 40; ++i) {
+		saveOrLoadInt(s, _inventoryObjectsList[i]);
+	}
+	for (int i = 0; i < 50; ++i) {
+		saveOrLoadInt(s, _inventoryItemsState[i]);
+	}
+	for (int i = 0; i < 50; ++i) {
+		saveOrLoadInt(s, _panelObjectsOffsetTable[i]);
+	}
+	saveOrLoadInt(s, _mainSpritesBaseOffset);
+	saveOrLoadInt(s, _selectedObject.xPos);
+	saveOrLoadInt(s, _selectedObject.yPos);
+	saveOrLoadInt(s, _locationNum);
+	saveOrLoadInt(s, _xPosCurrent);
+	saveOrLoadInt(s, _yPosCurrent);
+	saveOrLoadInt(s, _inventoryObjectsCount);
+	saveOrLoadInt(s, _inventoryObjectsOffset);
+}
+
+void TuckerEngine::loadGame(int slot) {
+	char gameStateFileName[64];
+	generateGameStateFileName(slot, gameStateFileName, 63);
+	Common::InSaveFile *f = _saveFileMan->openForLoading(gameStateFileName);
+	if (f) {
+		uint16 version = f->readUint16LE();
+		if (version < kCurrentGameStateVersion) {
+			warning("Unsupported gamestate version %d (slot %d)", version, slot);
+		} else {
+			f->skip(2);
+			saveOrLoadGameStateData(*f);
+			if (f->ioFailed()) {
+				warning("Can't read file '%s'", gameStateFileName);
+			} else {
+				_nextLocationNum = _locationNum;
+				setBlackPalette();
+				loadBudSpr(0);
+			}
+		}
+		delete f;
+	}
+}
+
+void TuckerEngine::saveGame(int slot) {
+	char gameStateFileName[64];
+	generateGameStateFileName(slot, gameStateFileName, 63);
+	Common::OutSaveFile *f = _saveFileMan->openForSaving(gameStateFileName);
+	if (f) {
+		f->writeUint16LE(kCurrentGameStateVersion);
+		f->writeUint16LE(0);
+		saveOrLoadGameStateData(*f);
+		f->finalize();
+		if (f->ioFailed()) {
+			warning("Can't write file '%s'", gameStateFileName);
+		}
+		delete f;
+	}
+}
+
+} // namespace Tucker