diff -r 5f8a03274d75 -r 6de6d9a64ebd sources/huffman/bitreader.h --- a/sources/huffman/bitreader.h Fri May 15 20:10:44 2015 +0300 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,85 +0,0 @@ -/** - * skulltag::BitReader class - Allows reading arbitrary bit lengths of data. - * Version 1 - Revsion 0 - * - * Copyright 2009 Timothy Landers - * email: code.vortexcortex@gmail.com - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -#ifndef _BIT_READER_VERSION -#define _BIT_READER_VERSION 1 - -/** Prevents naming convention problems via encapsulation. */ -namespace skulltag { // scope limitation - -/** BitReader - Allows reading of varying amounts of bits from a char buffer.
- * Very usefull for inputting variable bit length encodings such as Huffman. */ - - class BitReader { - int bufferBits; /**< intermediary buffer of bits. */ - int bitsUsed; /**< number of bits used in the buffer. */ - unsigned char const * currentByte; /**< position in memory the next char will be read. */ - int bytesAvailable; /**< amount of available space left in the input buffer in bytes. Excludes the contents of bufferBits. */ - int bitsAvailable; /**< amount of available space left in the input buffer in bits. Includes the contents of bufferBits. */ - int maximumBytes; /**< total amount of bytes that can be read from the input buffer. */ - static int mask[]; /**< maps a number of bits to a bit mask containing as many bits. */ - static int intSize; /**< number of chars in an int. */ - static int intBitSize; /**< number of bits in an ing. */ -public: - - /** Creates a new BitReader. */ - BitReader(); - - /** Creates a new BitReader. - * @param input Source of data that bits will be read from. - * @param max Maximum number of chars to read. */ - BitReader( unsigned char const * input, int const &max ); - - /** Sets the input buffer that bytes will be read from. - * @param input Source of data that bits will be read from. - * @param max Maximum number of chars to input. - * @return true if successful, false if an error occurs. */ - bool inputBuffer( unsigned char const * input, int const &max ); - - /** Fetches a specified number of bits and stores them in an int. - * @param bits destination of the retrieved bits.
- * The bits will be stored in the least significant portion of the int. - * @param count the number of bits to fetch. - * @return the number of bits read -- may not be equal to the amount requested. */ - int get( int &bits, int const &count ); - - /** @return Amount of bits that can be read from this BitReader. */ - int availableBits(); - - private: - - /** Fills the internal bit buffer. - * @return true if successful, false if an error occurs. */ - bool fill(); - - /** Initializes this BitReader. */ - void init(); - - }; - -} -#endif -