/* LZ4Demo - Demo CLI program using LZ4 compression Copyright (C) Yann Collet 2011, 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. You can contact the author at : - LZ4 homepage : http://fastcompression.blogspot.com/p/lz4.html - LZ4 source repository : http://code.google.com/p/lz4/ */ /* Note : this is *only* a demo program, an example to show how LZ4 can be used. It is not considered part of LZ4 compression library. The license of the demo program is GPL. The license of LZ4 is BSD. */ //**************************** // Includes //**************************** #include // fprintf, fopen, fread #include // malloc #include // strcmp #ifdef _WIN32 #include // _setmode #include // _O_BINARY #endif #include "lz4.h" //************************************** // Basic Types //************************************** #if defined(_MSC_VER) || defined(_WIN32) || defined(__WIN32__) #define BYTE unsigned __int8 #define U16 unsigned __int16 #define U32 unsigned __int32 #define S32 __int32 #define U64 unsigned __int64 #else #include #define BYTE uint8_t #define U16 uint16_t #define U32 uint32_t #define S32 int32_t #define U64 uint64_t #endif //**************************** // Constants //**************************** #define COMPRESSOR_NAME "Compression CLI using LZ4 algorithm" #define COMPRESSOR_VERSION "" #define COMPILED __DATE__ #define AUTHOR "Yann Collet" #define BINARY_NAME "LZ4.exe" #define EXTENSION ".lz4" #define WELCOME_MESSAGE "*** %s %s, by %s (%s) ***\n", COMPRESSOR_NAME, COMPRESSOR_VERSION, AUTHOR, COMPILED #define CHUNKSIZE (8<<20) // 8 MB #define CACHELINE 64 #define OUT_CHUNKSIZE (CHUNKSIZE + (CHUNKSIZE/255) + CACHELINE) #define ARCHIVE_MAGICNUMBER 0x184C2102 #define ARCHIVE_MAGICNUMBER_SIZE 4 //**************************** // Functions //**************************** int usage() { fprintf(stderr, "Usage :\n"); fprintf(stderr, " %s [arg] input output\n",BINARY_NAME); fprintf(stderr, "Arguments :\n"); fprintf(stderr, " -c : compression (default)\n"); fprintf(stderr, " -d : decompression \n"); fprintf(stderr, " -t : test compressed file \n"); fprintf(stderr, " -h : help (this text)\n"); fprintf(stderr, "input : can be 'stdin' (pipe) or a filename\n"); fprintf(stderr, "output : can be 'stdout'(pipe) or a filename or 'null'\n"); return 0; } int badusage() { fprintf(stderr, "Wrong parameters\n"); usage(); return 0; } int compress_file(char* input_filename, char* output_filename) { U64 filesize = 0; U64 compressedfilesize = ARCHIVE_MAGICNUMBER_SIZE; char* in_buff; char* out_buff; FILE* finput; FILE* foutput; char stdinmark[] = "stdin"; char stdoutmark[] = "stdout"; if (!strcmp (input_filename, stdinmark)) { fprintf(stderr, "Using stdin for input\n"); finput = stdin; #ifdef _WIN32 // Need to set stdin/stdout to binary mode specifically for windows _setmode( _fileno( stdin ), _O_BINARY ); #endif } else { finput = fopen( input_filename, "rb" ); } if (!strcmp (output_filename, stdoutmark)) { fprintf(stderr, "Using stdout for output\n"); foutput = stdout; #ifdef _WIN32 // Need to set stdin/stdout to binary mode specifically for windows _setmode( _fileno( stdout ), _O_BINARY ); #endif } else { foutput = fopen( output_filename, "wb" ); } if ( finput==0 ) { fprintf(stderr, "Pb opening %s\n", input_filename); return 2; } if ( foutput==0) { fprintf(stderr, "Pb opening %s\n", output_filename); return 3; } // Allocate Memory in_buff = malloc(CHUNKSIZE); out_buff = malloc(OUT_CHUNKSIZE); // Write Archive Header *(U32*)out_buff = ARCHIVE_MAGICNUMBER; fwrite(out_buff, 1, ARCHIVE_MAGICNUMBER_SIZE, foutput); // Main Loop while (1) { int outSize; // Read Block int inSize = fread(in_buff, 1, CHUNKSIZE, finput); if( inSize<=0 ) break; filesize += inSize; // Compress Block outSize = LZ4_compress(in_buff, out_buff+4, inSize); * (U32*) out_buff = outSize; compressedfilesize += outSize+4; // Write Block fwrite(out_buff, 1, outSize+4, foutput); } // Status fprintf(stderr, "Compressed %llu bytes into %llu bytes ==> %.2f%%\n", (unsigned long long) filesize, (unsigned long long) compressedfilesize, (double)compressedfilesize/filesize*100); fclose(finput); fclose(foutput); return 0; } int decode_file(char* input_filename, char* output_filename) { U64 filesize = 0; char* in_buff; char* out_buff; size_t uselessRet; int sinkint; U32 nextSize; FILE* finput; FILE* foutput; char stdinmark[] = "stdin"; char stdoutmark[] = "stdout"; if (!strcmp (input_filename, stdinmark)) { fprintf(stderr, "Using stdin for input\n"); finput = stdin; #ifdef _WIN32 // need to set stdin/stdout to binary mode _setmode( _fileno( stdin ), _O_BINARY ); #endif } else { finput = fopen( input_filename, "rb" ); } if (!strcmp (output_filename, stdoutmark)) { fprintf(stderr, "Using stdout for output\n"); foutput = stdout; #ifdef _WIN32 // need to set stdin/stdout to binary mode _setmode( _fileno( stdout ), _O_BINARY ); #endif } else { foutput = fopen( output_filename, "wb" ); } // Allocate Memory in_buff = malloc(OUT_CHUNKSIZE); out_buff = malloc(CHUNKSIZE); // Check Archive Header uselessRet = fread(out_buff, 1, ARCHIVE_MAGICNUMBER_SIZE, finput); if (*(U32*)out_buff != ARCHIVE_MAGICNUMBER) { fprintf(stderr,"Unrecognized header : file cannot be decoded\n"); return 6; } uselessRet = fread(in_buff, 1, 4, finput); nextSize = *(U32*)in_buff; // Main Loop while (1) { // Read Block uselessRet = fread(in_buff, 1, nextSize, finput); // Check Next Block uselessRet = (U32) fread(&nextSize, 1, 4, finput); if( uselessRet==0 ) break; // Decode Block sinkint = LZ4_uncompress(in_buff, out_buff, CHUNKSIZE); filesize += CHUNKSIZE; // Write Block fwrite(out_buff, 1, CHUNKSIZE, foutput); } // Last Block uselessRet = fread(in_buff, 1, nextSize, finput); sinkint = LZ4_uncompress_unknownOutputSize(in_buff, out_buff, nextSize, CHUNKSIZE); filesize += sinkint; fwrite(out_buff, 1, sinkint, foutput); // Status fprintf(stderr, "Successfully decoded %llu bytes \n", (unsigned long long)filesize); fclose(finput); fclose(foutput); return 0; } int main(int argc, char** argv) { int i, compression=1, // default action if no argument decode=0; char* input_filename=0; char* output_filename=0; #ifdef _WIN32 char nulmark[] = "nul"; #else char nulmark[] = "/dev/null"; #endif char nullinput[] = "null"; // Welcome message fprintf(stderr, WELCOME_MESSAGE); if (argc<2) { badusage(); return 1; } for(i=1; i Error if(!input_filename) { badusage(); return 1; } // No output filename if (!output_filename) { badusage(); return 1; } if (decode) return decode_file(input_filename, output_filename); if (compression) return compress_file(input_filename, output_filename); badusage(); return 0; }