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common/compression/powerpacker.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 COMMON_POWERPACKER_H
+#define COMMON_POWERPACKER_H
+
+#include "common/stream.h"
+
+namespace Common {
+class PowerPackerStream : public Common::SeekableReadStream {
+
+	SeekableReadStream *_stream;
+	bool				_dispose;
+
+private:
+	static int ppDecrunchBuffer(const byte *src, byte *dest, uint32 src_len, uint32 dest_len);
+	static uint16 getCrunchType(uint32 signature);
+
+public:
+	PowerPackerStream(Common::SeekableReadStream &stream);
+
+	static byte *unpackBuffer(const byte *input, uint32 input_len, uint32 &output_len);
+
+	~PowerPackerStream() override {
+		if (_dispose) delete _stream;
+	}
+
+	int64 size() const override {
+		return _stream->size();
+	}
+
+	int64 pos() const override {
+		return _stream->pos();
+	}
+
+	bool eos() const override {
+		return _stream->eos();
+	}
+
+	bool seek(int64 offs, int whence = SEEK_SET) override {
+		return _stream->seek(offs, whence);
+	}
+
+	uint32 read(void *dataPtr, uint32 dataSize) override {
+		return _stream->read(dataPtr, dataSize);
+	}
+
+};
+} // End of namespace Common
+
+#endif