From d8a961244d99a87c1a01613a971173cc135c246a Mon Sep 17 00:00:00 2001
From: Filippos Karapetis
Date: Tue, 16 Dec 2014 01:14:37 +0200
Subject: ZVISION: Move all the file-related classes together

---
 engines/zvision/file/lzss_read_stream.h | 71 +++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 engines/zvision/file/lzss_read_stream.h

(limited to 'engines/zvision/file/lzss_read_stream.h')

diff --git a/engines/zvision/file/lzss_read_stream.h b/engines/zvision/file/lzss_read_stream.h
new file mode 100644
index 0000000000..1420621f13
--- /dev/null
+++ b/engines/zvision/file/lzss_read_stream.h
@@ -0,0 +1,71 @@
+/* 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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef ZVISION_LZSS_STREAM_H
+#define ZVISION_LZSS_STREAM_H
+
+#include "common/stream.h"
+#include "common/array.h"
+
+namespace Common {
+class SeekableReadStream;
+}
+
+namespace ZVision {
+
+class LzssReadStream : public Common::ReadStream {
+public:
+	/**
+	 * A class that decompresses LZSS data and implements ReadStream for easy access
+	 * to the decompiled data.
+	 *
+	 * @param source              The source data
+	 */
+	LzssReadStream(Common::SeekableReadStream *source);
+
+private:
+	enum {
+		BLOCK_SIZE = 0x1000
+	};
+
+private:
+	Common::SeekableReadStream *_source;
+	byte _window[BLOCK_SIZE];
+	uint _windowCursor;
+	bool _eosFlag;
+
+public:
+	bool eos() const;
+	uint32 read(void *dataPtr, uint32 dataSize);
+
+private:
+	/**
+	 * Decompress the next <numberOfBytes> from the source stream. Or until EOS
+	 *
+	 * @param numberOfBytes    How many bytes to decompress. This is a count of source bytes, not destination bytes
+	 */
+	uint32 decompressBytes(byte *destination, uint32 numberOfBytes);
+};
+
+}
+
+#endif
-- 
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