feat: 9.5.9
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172
lz4/tests/datagencli.c
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172
lz4/tests/datagencli.c
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/*
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datagencli.c
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compressible data command line generator
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Copyright (C) Yann Collet 2012-2016
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GPL v2 License
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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You can contact the author at :
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- LZ4 source repository : https://github.com/lz4/lz4
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- Public forum : https://groups.google.com/forum/#!forum/lz4c
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*/
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/**************************************
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* Includes
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**************************************/
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#include "util.h" /* U32 */
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#include <stdio.h> /* fprintf, stderr */
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#include "datagen.h" /* RDG_generate */
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#include "lz4.h" /* LZ4_VERSION_STRING */
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/**************************************
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* Constants
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**************************************/
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#define KB *(1 <<10)
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#define MB *(1 <<20)
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#define GB *(1U<<30)
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#define SIZE_DEFAULT (64 KB)
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#define SEED_DEFAULT 0
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#define COMPRESSIBILITY_DEFAULT 50
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/**************************************
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* Macros
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**************************************/
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#define DISPLAY(...) fprintf(stderr, __VA_ARGS__)
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#define DISPLAYLEVEL(l, ...) if (displayLevel>=l) { DISPLAY(__VA_ARGS__); }
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static unsigned displayLevel = 2;
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/*********************************************************
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* Command line
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*********************************************************/
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static int usage(char* programName)
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{
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DISPLAY( "Compressible data generator\n");
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DISPLAY( "Usage :\n");
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DISPLAY( " %s [size] [args]\n", programName);
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DISPLAY( "\n");
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DISPLAY( "Arguments :\n");
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DISPLAY( " -g# : generate # data (default:%i)\n", SIZE_DEFAULT);
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DISPLAY( " -s# : Select seed (default:%i)\n", SEED_DEFAULT);
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DISPLAY( " -P# : Select compressibility in %% (default:%i%%)\n", COMPRESSIBILITY_DEFAULT);
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DISPLAY( " -h : display help and exit\n");
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DISPLAY( "Special values :\n");
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DISPLAY( " -P0 : generate incompressible noise\n");
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DISPLAY( " -P100 : generate sparse files\n");
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return 0;
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}
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int main(int argc, char** argv)
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{
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int argNb;
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double proba = (double)COMPRESSIBILITY_DEFAULT / 100;
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double litProba = 0.0;
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U64 size = SIZE_DEFAULT;
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U32 seed = SEED_DEFAULT;
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char* programName;
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/* Check command line */
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programName = argv[0];
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for(argNb=1; argNb<argc; argNb++)
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{
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char* argument = argv[argNb];
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if(!argument) continue; /* Protection if argument empty */
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/* Handle commands. Aggregated commands are allowed */
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if (*argument=='-')
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{
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argument++;
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while (*argument!=0)
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{
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switch(*argument)
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{
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case 'h':
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return usage(programName);
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case 'g':
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argument++;
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size=0;
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while ((*argument>='0') && (*argument<='9'))
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{
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size *= 10;
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size += *argument - '0';
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argument++;
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}
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if (*argument=='K') { size <<= 10; argument++; }
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if (*argument=='M') { size <<= 20; argument++; }
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if (*argument=='G') { size <<= 30; argument++; }
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if (*argument=='B') { argument++; }
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break;
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case 's':
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argument++;
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seed=0;
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while ((*argument>='0') && (*argument<='9'))
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{
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seed *= 10;
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seed += *argument - '0';
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argument++;
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}
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break;
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case 'P':
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argument++;
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proba=0.0;
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while ((*argument>='0') && (*argument<='9'))
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{
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proba *= 10;
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proba += *argument - '0';
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argument++;
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}
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if (proba>100.) proba=100.;
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proba /= 100.;
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break;
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case 'L': /* hidden argument : Literal distribution probability */
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argument++;
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litProba=0.;
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while ((*argument>='0') && (*argument<='9'))
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{
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litProba *= 10;
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litProba += *argument - '0';
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argument++;
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}
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if (litProba>100.) litProba=100.;
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litProba /= 100.;
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break;
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case 'v':
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displayLevel = 4;
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argument++;
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break;
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default:
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return usage(programName);
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}
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}
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}
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}
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DISPLAYLEVEL(4, "Data Generator %s \n", LZ4_VERSION_STRING);
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DISPLAYLEVEL(3, "Seed = %u \n", seed);
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if (proba!=COMPRESSIBILITY_DEFAULT) DISPLAYLEVEL(3, "Compressibility : %i%%\n", (U32)(proba*100));
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RDG_genOut(size, proba, litProba, seed);
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DISPLAYLEVEL(1, "\n");
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return 0;
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}
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