1 /* 2 datagencli.c 3 compressible data command line generator 4 Copyright (C) Yann Collet 2012-2016 5 6 GPL v2 License 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 2 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License along 19 with this program; if not, write to the Free Software Foundation, Inc., 20 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 21 22 You can contact the author at : 23 - LZ4 source repository : https://github.com/lz4/lz4 24 - Public forum : https://groups.google.com/forum/#!forum/lz4c 25 */ 26 27 /************************************** 28 * Includes 29 **************************************/ 30 #include "util.h" /* U32 */ 31 #include <stdio.h> /* fprintf, stderr */ 32 #include "datagen.h" /* RDG_generate */ 33 #include "lz4.h" /* LZ4_VERSION_STRING */ 34 35 36 /************************************** 37 * Constants 38 **************************************/ 39 #define KB *(1 <<10) 40 #define MB *(1 <<20) 41 #define GB *(1U<<30) 42 43 #define SIZE_DEFAULT (64 KB) 44 #define SEED_DEFAULT 0 45 #define COMPRESSIBILITY_DEFAULT 50 46 47 48 /************************************** 49 * Macros 50 **************************************/ 51 #define DISPLAY(...) fprintf(stderr, __VA_ARGS__) 52 #define DISPLAYLEVEL(l, ...) if (displayLevel>=l) { DISPLAY(__VA_ARGS__); } 53 static unsigned displayLevel = 2; 54 55 56 /********************************************************* 57 * Command line 58 *********************************************************/ 59 static int usage(char* programName) 60 { 61 DISPLAY( "Compressible data generator\n"); 62 DISPLAY( "Usage :\n"); 63 DISPLAY( " %s [size] [args]\n", programName); 64 DISPLAY( "\n"); 65 DISPLAY( "Arguments :\n"); 66 DISPLAY( " -g# : generate # data (default:%i)\n", SIZE_DEFAULT); 67 DISPLAY( " -s# : Select seed (default:%i)\n", SEED_DEFAULT); 68 DISPLAY( " -P# : Select compressibility in %% (default:%i%%)\n", COMPRESSIBILITY_DEFAULT); 69 DISPLAY( " -h : display help and exit\n"); 70 DISPLAY( "Special values :\n"); 71 DISPLAY( " -P0 : generate incompressible noise\n"); 72 DISPLAY( " -P100 : generate sparse files\n"); 73 return 0; 74 } 75 76 77 int main(int argc, char** argv) 78 { 79 int argNb; 80 double proba = (double)COMPRESSIBILITY_DEFAULT / 100; 81 double litProba = 0.0; 82 U64 size = SIZE_DEFAULT; 83 U32 seed = SEED_DEFAULT; 84 char* programName; 85 86 /* Check command line */ 87 programName = argv[0]; 88 for(argNb=1; argNb<argc; argNb++) 89 { 90 char* argument = argv[argNb]; 91 92 if(!argument) continue; /* Protection if argument empty */ 93 94 /* Handle commands. Aggregated commands are allowed */ 95 if (*argument=='-') 96 { 97 argument++; 98 while (*argument!=0) 99 { 100 switch(*argument) 101 { 102 case 'h': 103 return usage(programName); 104 case 'g': 105 argument++; 106 size=0; 107 while ((*argument>='0') && (*argument<='9')) 108 { 109 size *= 10; 110 size += *argument - '0'; 111 argument++; 112 } 113 if (*argument=='K') { size <<= 10; argument++; } 114 if (*argument=='M') { size <<= 20; argument++; } 115 if (*argument=='G') { size <<= 30; argument++; } 116 if (*argument=='B') { argument++; } 117 break; 118 case 's': 119 argument++; 120 seed=0; 121 while ((*argument>='0') && (*argument<='9')) 122 { 123 seed *= 10; 124 seed += *argument - '0'; 125 argument++; 126 } 127 break; 128 case 'P': 129 argument++; 130 proba=0.0; 131 while ((*argument>='0') && (*argument<='9')) 132 { 133 proba *= 10; 134 proba += *argument - '0'; 135 argument++; 136 } 137 if (proba>100.) proba=100.; 138 proba /= 100.; 139 break; 140 case 'L': /* hidden argument : Literal distribution probability */ 141 argument++; 142 litProba=0.; 143 while ((*argument>='0') && (*argument<='9')) 144 { 145 litProba *= 10; 146 litProba += *argument - '0'; 147 argument++; 148 } 149 if (litProba>100.) litProba=100.; 150 litProba /= 100.; 151 break; 152 case 'v': 153 displayLevel = 4; 154 argument++; 155 break; 156 default: 157 return usage(programName); 158 } 159 } 160 161 } 162 } 163 164 DISPLAYLEVEL(4, "Data Generator %s \n", LZ4_VERSION_STRING); 165 DISPLAYLEVEL(3, "Seed = %u \n", seed); 166 if (proba!=COMPRESSIBILITY_DEFAULT) DISPLAYLEVEL(3, "Compressibility : %i%%\n", (U32)(proba*100)); 167 168 RDG_genOut(size, proba, litProba, seed); 169 DISPLAYLEVEL(1, "\n"); 170 171 return 0; 172 } 173
