Initial commit

engines/draci/saveload.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 "draci/draci.h"
+#include "draci/game.h"
+#include "draci/saveload.h"
+
+#include "common/serializer.h"
+#include "common/savefile.h"
+#include "common/system.h"
+
+#include "graphics/scaler.h"
+#include "graphics/thumbnail.h"
+
+namespace Draci {
+
+static const char *const draciIdentString = "DRACI";
+
+WARN_UNUSED_RESULT bool readSavegameHeader(Common::InSaveFile *in, DraciSavegameHeader &header, bool skipThumbnail) {
+	char saveIdentBuffer[6];
+
+	// Validate the header Id
+	in->read(saveIdentBuffer, 6);
+	if (strcmp(saveIdentBuffer, draciIdentString) != 0)
+		return false;
+
+	header.version = in->readByte();
+	// Version 1 is compatible with Version 2
+	if (header.version > DRACI_SAVEGAME_VERSION)
+		return false;
+
+	// Read in the string
+	header.saveName.clear();
+	char ch;
+	while ((ch = (char)in->readByte()) != '\0') header.saveName += ch;
+
+	header.date = in->readUint32LE();
+	header.time = in->readUint16LE();
+	header.playtime = in->readUint32LE();
+
+	// Get the thumbnail
+	if (!Graphics::loadThumbnail(*in, header.thumbnail, skipThumbnail)) {
+		return false;
+	}
+
+	return true;
+}
+
+void writeSavegameHeader(Common::OutSaveFile *out, const DraciSavegameHeader &header) {
+	// Write out a savegame header
+	out->write(draciIdentString, 6);
+	out->writeByte(DRACI_SAVEGAME_VERSION);
+
+	// Write savegame name
+	out->write(header.saveName.c_str(), header.saveName.size() + 1);
+
+	out->writeUint32LE(header.date);
+	out->writeUint16LE(header.time);
+	out->writeUint32LE(header.playtime);
+
+	// Create a thumbnail and save it
+	Graphics::saveThumbnail(*out);
+}
+
+Common::Error saveSavegameData(int saveGameIdx, const Common::String &saveName, DraciEngine &vm) {
+	Common::String filename = vm.getSavegameFile(saveGameIdx);
+	Common::SaveFileManager *saveMan = g_system->getSavefileManager();
+	Common::OutSaveFile *f = saveMan->openForSaving(filename);
+	if (f == nullptr)
+		return Common::kNoGameDataFoundError;
+
+	TimeDate curTime;
+	vm._system->getTimeAndDate(curTime);
+
+	// Save the savegame header
+	DraciSavegameHeader header;
+	header.saveName = saveName;
+	header.date = ((curTime.tm_mday & 0xFF) << 24) | (((curTime.tm_mon + 1) & 0xFF) << 16) | ((curTime.tm_year + 1900) & 0xFFFF);
+	header.time = ((curTime.tm_hour & 0xFF) << 8) | ((curTime.tm_min) & 0xFF);
+	header.playtime = vm.getTotalPlayTime() / 1000;
+	writeSavegameHeader(f, header);
+
+	if (f->err()) {
+		delete f;
+		saveMan->removeSavefile(filename);
+		return Common::kWritingFailed;
+	} else {
+		// Create the remainder of the savegame
+		Common::Serializer s(nullptr, f);
+		vm._game->synchronize(s, header.version);
+
+		f->finalize();
+		delete f;
+		return Common::kNoError;
+	}
+}
+
+Common::Error loadSavegameData(int saveGameIdx, DraciEngine *vm) {
+	Common::String saveName;
+
+	Common::SaveFileManager *saveMan = g_system->getSavefileManager();
+	Common::InSaveFile *f = saveMan->openForLoading(vm->getSavegameFile(saveGameIdx));
+
+	if (f == nullptr) {
+		return Common::kNoGameDataFoundError;
+	}
+
+	// Skip over the savegame header
+	DraciSavegameHeader header;
+	if (!readSavegameHeader(f, header)) {
+		return Common::kNoGameDataFoundError;
+	}
+
+	// Pre-processing
+	vm->_game->rememberRoomNumAsPrevious();
+	vm->_game->deleteObjectAnimations();
+
+	// Synchronise the remaining data of the savegame
+	Common::Serializer s(f, nullptr);
+	vm->_game->synchronize(s, header.version);
+	delete f;
+
+	// Post-processing
+	vm->_game->scheduleEnteringRoomUsingGate(vm->_game->getRoomNum(), 0);
+	vm->_game->setExitLoop(true);
+	vm->_game->setIsReloaded(true);
+
+	vm->_game->inventoryReload();
+
+	vm->setTotalPlayTime(header.playtime * 1000);
+
+	return Common::kNoError;
+}
+
+} // End of namespace Draci