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engines/twine/resources/lzss.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 TWINE_RESOURCES_LZSS_H
+#define TWINE_RESOURCES_LZSS_H
+
+#include "common/stream.h"
+
+namespace TwinE {
+
+class LzssReadStream : public Common::SeekableReadStream {
+private:
+	uint8 *_outLzssBufData;
+	uint32 _size;
+	uint32 _pos;
+	bool _err = false;
+
+	void decodeLZSS(Common::ReadStream *indata, uint32 mode, uint32 length);
+
+public:
+	LzssReadStream(Common::ReadStream *indata, uint32 mode, uint32 realsize);
+	virtual ~LzssReadStream();
+
+	void clearErr() override { _err = false; }
+	bool err() const override { return _err; }
+	int64 pos() const override { return _pos; }
+	int64 size() const override { return _size; }
+	bool seek(int64 offset, int whence = SEEK_SET) override;
+
+	bool eos() const override;
+	uint32 read(void *buf, uint32 size) override;
+};
+
+} // namespace TwinE
+
+#endif