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/*
datagencli.c
compressible data command line generator
Copyright (C) Yann Collet 2012-2020
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 "loremOut.h" /* LOREM_genOut */
#include "lz4.h" /* LZ4_VERSION_STRING */
/**************************************
* Compiler specific
**************************************/
#ifdef _MSC_VER /* Visual Studio */
# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
# define strtoull _strtoui64 /* https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/strtoui64-wcstoui64-strtoui64-l-wcstoui64-l */
#endif
/**************************************
* Constants
**************************************/
#define KB *(1 <<10)
#define MB *(1 <<20)
#define GB *(1U<<30)
#define SIZE_DEFAULT (64 KB)
#define SEED_DEFAULT 0
#define COMPRESSIBILITY_NOT_SET 9999
/**************************************
* Macros
**************************************/
#define DISPLAY(...) fprintf(stderr, __VA_ARGS__)
#define DISPLAYLEVEL(l, ...) do { if (displayLevel>=(l)) DISPLAY(__VA_ARGS__); } while (0)
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 %% (range [0-100])\n");
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;
unsigned long long proba = COMPRESSIBILITY_NOT_SET;
double litProba = 0.0;
U64 size = SIZE_DEFAULT;
unsigned 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 = strtoull(argument, &argument, 10);
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 = (unsigned)strtoul(argument, &argument, 10);
break;
case 'P':
argument++;
proba = strtoull(argument, &argument, 10);
break;
case 'L': /* hidden argument : Literal distribution probability */
argument++;
litProba = (double) strtoull(argument, &argument, 10);
if (litProba>100.) litProba=100.;
litProba /= 100.;
break;
case 'v':
displayLevel = 4;
argument++;
break;
default:
return usage(programName);
}
}
} /* if (*argument=='-') */
} /* for(argNb=1; argNb<argc; argNb++) */
DISPLAYLEVEL(4, "Data Generator %s \n", LZ4_VERSION_STRING);
DISPLAYLEVEL(3, "Seed = %u \n", seed);
if (proba != COMPRESSIBILITY_NOT_SET) {
DISPLAYLEVEL(3, "Compressibility : %i%%\n", (int)proba);
RDG_genOut(size, (double)proba / 100., litProba, seed);
} else {
LOREM_genOut(size, seed);
}
DISPLAYLEVEL(1, "\n");
return 0;
}
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