EBOOKBitStream.h
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* libe-book
00003  * Version: MPL 2.0 / LGPLv2.1+
00004  *
00005  * This Source Code Form is subject to the terms of the Mozilla Public
00006  * License, v. 2.0. If a copy of the MPL was not distributed with this
00007  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
00008  *
00009  * Alternatively, the contents of this file may be used under the terms
00010  * of the GNU Lesser General Public License Version 2.1 or later
00011  * (LGPLv2.1+), in which case the provisions of the LGPLv2.1+ are
00012  * applicable instead of those above.
00013  *
00014  * For further information visit http://libebook.sourceforge.net
00015  */
00016 
00017 #ifndef EBOOKBITSTREAM_H_INCLUDED
00018 #define EBOOKBITSTREAM_H_INCLUDED
00019 
00020 #include "libebook_utils.h"
00021 
00022 class WPXInputStream;
00023 
00024 namespace libebook
00025 {
00026 
00027 class EBOOKBitStream
00028 {
00029 public:
00030   explicit EBOOKBitStream(WPXInputStream *stream);
00031 
00032   uint32_t read(uint8_t numberOfBits, bool bigEndian = false);
00033 
00034   bool atEOS() const;
00035   bool atLastByte() const;
00036 
00037 private:
00038   void fill();
00039 
00044   uint8_t readByte();
00045 
00053   uint8_t readBits(uint8_t numberOfBits);
00054 
00055   uint8_t readAvailableBits(uint8_t numberOfBits);
00056 
00057 private:
00058   static const uint8_t s_masks[8];
00059 
00060 private:
00061   WPXInputStream *const m_stream;
00062   uint8_t m_current;
00063   uint8_t m_available;
00064 };
00065 
00066 }
00067 
00068 #endif // EBOOKBITSTREAM_H_INCLUDED
00069 
00070 /* vim:set shiftwidth=2 softtabstop=2 expandtab: */