diff -r 5f8a03274d75 -r 6de6d9a64ebd sources/huffman/huffman.cpp --- a/sources/huffman/huffman.cpp Fri May 15 20:10:44 2015 +0300 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,159 +0,0 @@ -/* - * Replacement for older Skulltag Launcher Protocol's huffman.cpp - * - * 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. - */ - -// required for atexit() -#include -#include - -#include "huffman.h" -#include "huffcodec.h" -// #include "i_system.h" - -using namespace skulltag; -// Global Variables - -/** Reference to the HuffmanCodec Object that will perform the encoding and decoding. */ -static HuffmanCodec * __codec = NULL; - -// Function Implementation - -/** Creates and intitializes a HuffmanCodec Object.
- * Also arranges for HUFFMAN_Destruct() to be called upon termination. */ -void HUFFMAN_Construct(){ - - // The exact structure description of a Huffman tree - static unsigned char const compatible_huffman_tree[] = { - 0, 0, 0, 1,128, 0, 0, 0, 3, 38, 34, 2, 1, 80, 3,110, - 144, 67, 0, 2, 1, 74, 3,243,142, 37, 2, 3,124, 58,182, 0, - 0, 1, 36, 0, 3,221,131, 3,245,163, 1, 35, 3,113, 85, 0, - 1, 41, 1, 77, 3,199,130, 0, 1,206, 3,185,153, 3, 70,118, - 0, 3, 3, 5, 0, 0, 1, 24, 0, 2, 3,198,190, 63, 2, 3, - 139,186, 75, 0, 1, 44, 2, 3,240,218, 56, 3, 40, 39, 0, 0, - 2, 2, 3,244,247, 81, 65, 0, 3, 9,125, 3, 68, 60, 0, 0, - 1, 25, 3,191,138, 3, 86, 17, 0, 1, 23, 3,220,178, 2, 3, - 165,194, 14, 1, 0, 2, 2, 0, 0, 2, 1,208, 3,150,157,181, - 1,222, 2, 3,216,230,211, 0, 2, 2, 3,252,141, 10, 42, 0, - 2, 3,134,135,104, 1,103, 3,187,225, 95, 32, 0, 0, 0, 0, - 0, 0, 1, 57, 1, 61, 3,183,237, 0, 0, 3,233,234, 3,246, - 203, 2, 3,250,147, 79, 1,129, 0, 1, 7, 3,143,136, 1, 20, - 3,179,148, 0, 0, 0, 3, 28,106, 3,101, 87, 1, 66, 0, 3, - 180,219, 3,227,241, 0, 1, 26, 1,251, 3,229,214, 3, 54, 69, - 0, 0, 0, 0, 0, 3,231,212, 3,156,176, 3, 93, 83, 0, 3, - 96,253, 3, 30, 13, 0, 0, 2, 3,175,254, 94, 3,159, 27, 2, - 1, 8, 3,204,226, 78, 0, 0, 0, 3,107, 88, 1, 31, 3,137, - 169, 2, 2, 3,215,145, 6, 4, 1,127, 0, 1, 99, 3,209,217, - 0, 3,213,238, 3,177,170, 1,132, 0, 0, 0, 2, 3, 22, 12, - 114, 2, 2, 3,158,197, 97, 45, 0, 1, 46, 1,112, 3,174,249, - 0, 3,224,102, 2, 3,171,151,193, 0, 0, 0, 3, 15, 16, 3, - 2,168, 1, 49, 3, 91,146, 0, 1, 48, 3,173, 29, 0, 3, 19, - 126, 3, 92,242, 0, 0, 0, 0, 0, 0, 3,205,192, 2, 3,235, - 149,255, 2, 3,223,184,248, 0, 0, 3,108,236, 3,111, 90, 2, - 3,117,115, 71, 0, 0, 3, 11, 50, 0, 3,188,119, 1,122, 3, - 167,162, 1,160, 1,133, 3,123, 21, 0, 0, 2, 1, 59, 2, 3, - 155,154, 98, 43, 0, 3, 76, 51, 2, 3,201,116, 72, 2, 0, 2, - 3,109,100,121, 2, 3,195,232, 18, 1, 0, 2, 0, 1,164, 2, - 3,120,189, 73, 0, 1,196, 3,239,210, 3, 64, 62, 89, 0, 0, - 1, 33, 2, 3,228,161, 55, 2, 3, 84,152, 47, 0, 0, 2, 3, - 207,172,140, 3, 82,166, 0, 3, 53,105, 1, 52, 3,202,200 - }; - - // create a HuffmanCodec that is compatible with the previous implementation. - __codec = new HuffmanCodec( compatible_huffman_tree, sizeof compatible_huffman_tree ); - - // set up the HuffmanCodec to perform in a backwards compatible fashion. - __codec->reversedBytes( true ); - __codec->allowExpansion( false ); - - // request that the destruct function be called upon exit. - // atterm( HUFFMAN_Destruct ); - atexit( HUFFMAN_Destruct ); -} - -/** Releases resources allocated by the HuffmanCodec. */ -void HUFFMAN_Destruct(){ - delete __codec; - __codec = NULL; -} - -/** Applies Huffman encoding to a block of data. */ -void HUFFMAN_Encode( - /** in: Pointer to start of data that is to be encoded. */ - unsigned char const * const inputBuffer, - /** out: Pointer to destination buffer where encoded data will be stored. */ - unsigned char * const outputBuffer, - /** in: Number of chars to read from inputBuffer. */ - int const &inputBufferSize, - /**< in+out: Max chars to write into outputBuffer.
- * Upon return holds the number of chars stored or 0 if an error occurs. */ - int * outputBufferSize -){ - int bytesWritten = __codec->encode( inputBuffer, outputBuffer, inputBufferSize, *outputBufferSize ); - - // expansion occured -- provide backwards compatibility - if ( bytesWritten < 0 ){ - // check buffer sizes - if ( *outputBufferSize < (inputBufferSize + 1) ){ - // outputBuffer too small, return "no bytes written" - *outputBufferSize = 0; - return; - } - - // perform the unencoded copy - for ( int i = 0; i < inputBufferSize; i++ ) outputBuffer[i+1] = inputBuffer[i]; - // supply the "unencoded" signal and bytesWritten - outputBuffer[0] = 0xff; - *outputBufferSize = inputBufferSize + 1; - } else { - // assign the bytesWritten return value - *outputBufferSize = bytesWritten; - } -} // end function HUFFMAN_Encode - -/** Decodes a block of data that is Huffman encoded. */ -void HUFFMAN_Decode( - unsigned char const * const inputBuffer, /**< in: Pointer to start of data that is to be decoded. */ - unsigned char * const outputBuffer, /**< out: Pointer to destination buffer where decoded data will be stored. */ - int const &inputBufferSize, /**< in: Number of chars to read from inputBuffer. */ - int *outputBufferSize /**< in+out: Max chars to write into outputBuffer. Upon return holds the number of chars stored or 0 if an error occurs. */ -){ - // check for "unencoded" signal & provide backwards compatibility - if ((inputBufferSize > 0) && ((inputBuffer[0]&0xff) == 0xff)){ - // check buffer sizes - if ( *outputBufferSize < (inputBufferSize - 1) ){ - // outputBuffer too small, return "no bytes written" - *outputBufferSize = 0; - return; - } - - // perform the unencoded copy - for ( int i = 1; i < inputBufferSize; i++ ) outputBuffer[i-1] = inputBuffer[i]; - - // supply the bytesWritten - *outputBufferSize = inputBufferSize - 1; - } else { - // decode the data - *outputBufferSize = __codec->decode( inputBuffer, outputBuffer, inputBufferSize, *outputBufferSize ); - } -} // end function HUFFMAN_Decode