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/*
datagencli.c
compressible data command line generator
Copyright (C) Yann Collet 2012-2016
GPL v2 License
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 source repository : https://github.com/lz4/lz4
- Public forum : https://groups.google.com/forum/#!forum/lz4c
*/
/**************************************
* Includes
**************************************/
#include "util.h" /* U32 */
#include <stdio.h> /* fprintf, stderr */
#include "datagen.h" /* RDG_generate */
#include "lz4.h" /* LZ4_VERSION_STRING */
/**************************************
* Constants
**************************************/
#define KB *(1 <<10)
#define MB *(1 <<20)
#define GB *(1U<<30)
#define SIZE_DEFAULT (64 KB)
#define SEED_DEFAULT 0
#define COMPRESSIBILITY_DEFAULT 50
/**************************************
* Macros
**************************************/
#define DISPLAY(...) fprintf(stderr, __VA_ARGS__)
#define DISPLAYLEVEL(l, ...) if (displayLevel>=l) { DISPLAY(__VA_ARGS__); }
static unsigned displayLevel = 2;
/*********************************************************
* Command line
*********************************************************/
static int usage(char* programName)
{
DISPLAY( "Compressible data generator\n");
DISPLAY( "Usage :\n");
DISPLAY( " %s [size] [args]\n", programName);
DISPLAY( "\n");
DISPLAY( "Arguments :\n");
DISPLAY( " -g# : generate # data (default:%i)\n", SIZE_DEFAULT);
DISPLAY( " -s# : Select seed (default:%i)\n", SEED_DEFAULT);
DISPLAY( " -P# : Select compressibility in %% (default:%i%%)\n", COMPRESSIBILITY_DEFAULT);
DISPLAY( " -h : display help and exit\n");
DISPLAY( "Special values :\n");
DISPLAY( " -P0 : generate incompressible noise\n");
DISPLAY( " -P100 : generate sparse files\n");
return 0;
}
int main(int argc, char** argv)
{
int argNb;
double proba = (double)COMPRESSIBILITY_DEFAULT / 100;
double litProba = 0.0;
U64 size = SIZE_DEFAULT;
U32 seed = SEED_DEFAULT;
char* programName;
/* Check command line */
programName = argv[0];
for(argNb=1; argNb<argc; argNb++)
{
char* argument = argv[argNb];
if(!argument) continue; /* Protection if argument empty */
/* Handle commands. Aggregated commands are allowed */
if (*argument=='-')
{
argument++;
while (*argument!=0)
{
switch(*argument)
{
case 'h':
return usage(programName);
case 'g':
argument++;
size=0;
while ((*argument>='0') && (*argument<='9'))
{
size *= 10;
size += *argument - '0';
argument++;
}
if (*argument=='K') { size <<= 10; argument++; }
if (*argument=='M') { size <<= 20; argument++; }
if (*argument=='G') { size <<= 30; argument++; }
if (*argument=='B') { argument++; }
break;
case 's':
argument++;
seed=0;
while ((*argument>='0') && (*argument<='9'))
{
seed *= 10;
seed += *argument - '0';
argument++;
}
break;
case 'P':
argument++;
proba=0.0;
while ((*argument>='0') && (*argument<='9'))
{
proba *= 10;
proba += *argument - '0';
argument++;
}
if (proba>100.) proba=100.;
proba /= 100.;
break;
case 'L': /* hidden argument : Literal distribution probability */
argument++;
litProba=0.;
while ((*argument>='0') && (*argument<='9'))
{
litProba *= 10;
litProba += *argument - '0';
argument++;
}
if (litProba>100.) litProba=100.;
litProba /= 100.;
break;
case 'v':
displayLevel = 4;
argument++;
break;
default:
return usage(programName);
}
}
}
}
DISPLAYLEVEL(4, "Data Generator %s \n", LZ4_VERSION_STRING);
DISPLAYLEVEL(3, "Seed = %u \n", seed);
if (proba!=COMPRESSIBILITY_DEFAULT) DISPLAYLEVEL(3, "Compressibility : %i%%\n", (U32)(proba*100));
RDG_genOut(size, proba, litProba, seed);
DISPLAYLEVEL(1, "\n");
return 0;
}
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