Initial commit

backends/saves/savefile.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 "common/util.h"
+#include "common/savefile.h"
+#include "common/str.h"
+#ifdef USE_CLOUD
+#include "backends/cloud/cloudmanager.h"
+#endif
+
+namespace Common {
+
+OutSaveFile::OutSaveFile(WriteStream *w): _wrapped(w) {}
+
+OutSaveFile::~OutSaveFile() {
+	delete _wrapped;
+#ifdef USE_CLOUD
+	CloudMan.syncSaves();
+#endif
+}
+
+bool OutSaveFile::err() const { return _wrapped->err(); }
+
+void OutSaveFile::clearErr() { _wrapped->clearErr(); }
+
+void OutSaveFile::finalize() {
+	_wrapped->finalize();
+}
+
+bool OutSaveFile::flush() { return _wrapped->flush(); }
+
+uint32 OutSaveFile::write(const void *dataPtr, uint32 dataSize) {
+	return _wrapped->write(dataPtr, dataSize);
+}
+
+int64 OutSaveFile::pos() const {
+	return _wrapped->pos();
+}
+
+bool OutSaveFile::seek(int64 offset, int whence) {
+	Common::SeekableWriteStream *sws =
+		dynamic_cast<Common::SeekableWriteStream *>(_wrapped);
+
+	if (sws) {
+		return sws->seek(offset, whence);
+	} else {
+		warning("Seeking isn't supported for compressed save files");
+		return false;
+	}
+}
+
+int64 OutSaveFile::size() const {
+	Common::SeekableWriteStream *sws =
+		dynamic_cast<Common::SeekableWriteStream *>(_wrapped);
+
+	if (sws) {
+		return sws->size();
+	} else {
+		warning("Size isn't supported for compressed save files");
+		return -1;
+	}
+}
+
+bool SaveFileManager::copySavefile(const String &oldFilename, const String &newFilename, bool compress) {
+	InSaveFile *inFile = nullptr;
+	OutSaveFile *outFile = nullptr;
+	uint32 size = 0;
+	void *buffer = nullptr;
+	bool success = false;
+
+	inFile = openForLoading(oldFilename);
+
+	if (inFile) {
+		size = inFile->size();
+		buffer = malloc(size);
+		assert(buffer);
+
+		outFile = openForSaving(newFilename, compress);
+
+		if (buffer && outFile) {
+			inFile->read(buffer, size);
+			bool error = inFile->err();
+			delete inFile;
+			inFile = nullptr;
+
+			if (!error) {
+				outFile->write(buffer, size);
+				outFile->finalize();
+
+				success = !outFile->err();
+			}
+		}
+
+		free(buffer);
+		delete outFile;
+		delete inFile;
+	}
+
+	return success;
+}
+
+bool SaveFileManager::renameSavefile(const String &oldFilename, const String &newFilename, bool compress) {
+	if (!copySavefile(oldFilename, newFilename, compress))
+		return false;
+
+	return removeSavefile(oldFilename);
+}
+
+String SaveFileManager::popErrorDesc() {
+	String err = _errorDesc;
+	clearError();
+
+	return err;
+}
+
+} // End of namespace Common