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backends/platform/n64/pakfs_save_manager.h

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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/>.
+ *
+ */
+
+#ifndef __PAKFS_SAVE_MANAGER__
+#define __PAKFS_SAVE_MANAGER__
+
+#include <common/savefile.h>
+#include <common/compression/deflate.h>
+
+#include <pakfs.h> // N64 PakFS library
+
+bool pakfs_deleteSaveGame(const char *filename);
+
+class InPAKSave : public Common::InSaveFile {
+private:
+	PAKFILE *fd;
+
+	uint32 read(void *buf, uint32 cnt) override;
+	bool skip(uint32 offset) override;
+	bool seek(int64 offs, int whence) override;
+
+public:
+	InPAKSave() : fd(NULL) { }
+
+	~InPAKSave() {
+		if (fd != NULL)
+			pakfs_close(fd);
+	}
+
+	bool eos() const override {
+		return pakfs_eof(fd);
+	}
+	void clearErr() override {
+		pakfs_clearerr(fd);
+	}
+	int64 pos() const override {
+		return pakfs_tell(fd);
+	}
+	int64 size() const override {
+		return fd->size;
+	}
+
+	bool readSaveGame(const char *filename) {
+		fd = pakfs_open(filename, "r");
+		return (fd != NULL);
+	}
+};
+
+class OutPAKSave : public Common::WriteStream {
+private:
+	PAKFILE *fd;
+
+public:
+	uint32 write(const void *buf, uint32 cnt);
+
+	virtual int64 pos() const {
+		return pakfs_tell(fd);
+	}
+
+	OutPAKSave(const char *_filename) : fd(NULL) {
+		fd = pakfs_open(_filename, "w");
+	}
+
+	~OutPAKSave() {
+		if (fd != NULL) {
+			finalize();
+			pakfs_close(fd);
+			flushCurrentPakData();
+		}
+	}
+
+	bool err() const {
+		if (fd)
+			return (pakfs_error(fd) == 1);
+		else
+			return true;
+	}
+	void clearErr() {
+		pakfs_clearerr(fd);
+	}
+	void finalize() {
+		pakfs_flush(fd);
+	}
+};
+
+class PAKSaveManager : public Common::SaveFileManager {
+public:
+	void updateSavefilesList(Common::StringArray &lockedFiles) override {
+		// this method is used to lock saves while cloud syncing
+		// as there is no network on N64, this method wouldn't be used
+		// thus it's not implemtented
+	}
+
+	Common::InSaveFile *openRawFile(const Common::String &filename) override {
+		InPAKSave *s = new InPAKSave();
+		if (s->readSaveGame(filename.c_str())) {
+			return s;
+		} else {
+			delete s;
+			return NULL;
+		}
+	}
+
+	Common::OutSaveFile *openForSaving(const Common::String &filename, bool compress = true) override {
+		OutPAKSave *s = new OutPAKSave(filename.c_str());
+		if (!s->err()) {
+			return new Common::OutSaveFile(compress ? Common::wrapCompressedWriteStream(s) : s);
+		} else {
+			delete s;
+			return NULL;
+		}
+	}
+
+	Common::InSaveFile *openForLoading(const Common::String &filename) override {
+		InPAKSave *s = new InPAKSave();
+		if (s->readSaveGame(filename.c_str())) {
+			return Common::wrapCompressedReadStream(s);
+		} else {
+			delete s;
+			return NULL;
+		}
+	}
+
+	bool removeSavefile(const Common::String &filename) override {
+		return ::pakfs_deleteSaveGame(filename.c_str());
+	}
+
+	Common::StringArray listSavefiles(const Common::String &pattern) override;
+
+	bool exists(const Common::String &filename) override {
+		return InPAKSave().readSaveGame(filename.c_str());
+	}
+};
+
+
+#endif