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engines/lilliput/metaengine.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 "engines/advancedDetector.h"
+#include "common/system.h"
+#include "common/savefile.h"
+#include "common/textconsole.h"
+#include "graphics/thumbnail.h"
+#include "graphics/surface.h"
+
+#include "lilliput/lilliput.h"
+#include "lilliput/detection.h"
+
+namespace Lilliput {
+
+uint32 LilliputEngine::getFeatures() const {
+	return _gameDescription->desc.flags;
+}
+
+const char *LilliputEngine::getGameId() const {
+	return _gameDescription->desc.gameId;
+}
+
+} // End of namespace Lilliput
+
+namespace Lilliput {
+
+class LilliputMetaEngine : public AdvancedMetaEngine<LilliputGameDescription> {
+public:
+	const char *getName() const override {
+		return "lilliput";
+	}
+
+	Common::Error createInstance(OSystem *syst, Engine **engine, const LilliputGameDescription *gd) const override;
+	bool hasFeature(MetaEngineFeature f) const override;
+
+	int getMaximumSaveSlot() const override;
+	SaveStateList listSaves(const char *target) const override;
+	SaveStateDescriptor querySaveMetaInfos(const char *target, int slot) const override;
+	bool removeSaveState(const char *target, int slot) const override;
+	Common::String getSavegameFile(int saveGameIdx, const char *target) const override {
+		if (!target)
+			target = getName();
+		if (saveGameIdx == kSavegameFilePattern)
+			return Common::String::format("%s-##.SAV", target);
+		else
+			return Common::String::format("%s-%02d.SAV", target, saveGameIdx);
+	}
+};
+
+Common::Error LilliputMetaEngine::createInstance(OSystem *syst, Engine **engine, const LilliputGameDescription *gd) const {
+	*engine = new LilliputEngine(syst,gd);
+	((LilliputEngine *)*engine)->initGame(gd);
+	return Common::kNoError;
+}
+
+bool LilliputMetaEngine::hasFeature(MetaEngineFeature f) const {
+	return
+		(f == kSupportsListSaves) ||
+		(f == kSupportsLoadingDuringStartup) ||
+		(f == kSupportsDeleteSave) ||
+		(f == kSavesSupportMetaInfo) ||
+		(f == kSavesSupportThumbnail) ||
+		(f == kSavesSupportCreationDate);
+}
+
+int LilliputMetaEngine::getMaximumSaveSlot() const {
+	return 99;
+}
+
+SaveStateList LilliputMetaEngine::listSaves(const char *target) const {
+	Common::SaveFileManager *saveFileMan = g_system->getSavefileManager();
+	Common::StringArray filenames;
+	Common::String pattern = target;
+	pattern += "-##.SAV";
+
+	filenames = saveFileMan->listSavefiles(pattern);
+
+	SaveStateList saveList;
+	char slot[3];
+	int slotNum;
+
+	for (const auto &filename : filenames) {
+		slot[0] = filename.c_str()[filename.size() - 6];
+		slot[1] = filename.c_str()[filename.size() - 5];
+		slot[2] = '\0';
+		// Obtain the last 2 digits of the filename (without extension), since they correspond to the save slot
+		slotNum = atoi(slot);
+		if (slotNum >= 0 && slotNum <= getMaximumSaveSlot()) {
+			Common::InSaveFile *file = saveFileMan->openForLoading(filename);
+			if (file) {
+				int saveVersion = file->readByte();
+
+				if (saveVersion != kSavegameVersion) {
+					warning("Savegame of incompatible version");
+					delete file;
+					continue;
+				}
+
+				// read name
+				uint16 nameSize = file->readUint16BE();
+				if (nameSize >= 255) {
+					delete file;
+					continue;
+				}
+				char name[256];
+				file->read(name, nameSize);
+				name[nameSize] = 0;
+
+				saveList.push_back(SaveStateDescriptor(this, slotNum, name));
+				delete file;
+			}
+		}
+	}
+
+	Common::sort(saveList.begin(), saveList.end(), SaveStateDescriptorSlotComparator());
+	return saveList;
+}
+
+SaveStateDescriptor LilliputMetaEngine::querySaveMetaInfos(const char *target, int slot) const {
+	Common::InSaveFile *file = g_system->getSavefileManager()->openForLoading(getSavegameFile(slot, target));
+
+	if (file) {
+		int saveVersion = file->readByte();
+
+		if (saveVersion != kSavegameVersion) {
+			warning("Savegame of incompatible version");
+			delete file;
+			return SaveStateDescriptor();
+		}
+
+		uint32 saveNameLength = file->readUint16BE();
+		Common::String saveName;
+		for (uint32 i = 0; i < saveNameLength; ++i) {
+			char curChr = file->readByte();
+			saveName += curChr;
+		}
+
+		SaveStateDescriptor desc(this, slot, saveName);
+
+		Graphics::Surface *thumbnail;
+		if (!Graphics::loadThumbnail(*file, thumbnail)) {
+			delete file;
+			return SaveStateDescriptor();
+		}
+		desc.setThumbnail(thumbnail);
+
+		uint32 saveDate = file->readUint32BE();
+		uint16 saveTime = file->readUint16BE();
+
+		int day = (saveDate >> 24) & 0xFF;
+		int month = (saveDate >> 16) & 0xFF;
+		int year = saveDate & 0xFFFF;
+
+		desc.setSaveDate(year, month, day);
+
+		int hour = (saveTime >> 8) & 0xFF;
+		int minutes = saveTime & 0xFF;
+
+		desc.setSaveTime(hour, minutes);
+
+		delete file;
+		return desc;
+	}
+	return SaveStateDescriptor();
+}
+
+bool LilliputMetaEngine::removeSaveState(const char *target, int slot) const {
+	return g_system->getSavefileManager()->removeSavefile(getSavegameFile(slot, target));
+}
+
+} // End of namespace Lilliput
+
+#if PLUGIN_ENABLED_DYNAMIC(LILLIPUT)
+	REGISTER_PLUGIN_DYNAMIC(LILLIPUT, PLUGIN_TYPE_ENGINE, Lilliput::LilliputMetaEngine);
+#else
+	REGISTER_PLUGIN_STATIC(LILLIPUT, PLUGIN_TYPE_ENGINE, Lilliput::LilliputMetaEngine);
+#endif
+
+namespace Lilliput {
+
+void LilliputEngine::initGame(const LilliputGameDescription *gd) {
+	_gameType = gd->gameType;
+	_platform = gd->desc.platform;
+}
+
+} // End of namespace Lilliput