129 lines
4.3 KiB
C
129 lines
4.3 KiB
C
/**
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* Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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/*-************************************
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* Includes
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**************************************/
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#include "util.h" /* Compiler options */
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#include <stdio.h> /* fprintf, stderr */
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#include "datagen.h" /* RDG_generate */
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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) + 1)
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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(const 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 [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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return 0;
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}
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int main(int argc, const char** argv)
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{
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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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const char* const programName = argv[0];
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int argNb;
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for(argNb=1; argNb<argc; argNb++) {
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const 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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argument++;
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while (*argument!=0) {
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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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size *= 10, size += *argument++ - '0';
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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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seed *= 10, seed += *argument++ - '0';
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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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proba *= 10, proba += *argument++ - '0';
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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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litProba *= 10, litProba += *argument++ - '0';
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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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} } } /* for(argNb=1; argNb<argc; argNb++) */
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DISPLAYLEVEL(4, "Data Generator \n");
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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_genStdout(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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