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/* Random kit 1.6 */
/*
* Generate a list of binary primitive polynomials.
*/
/*
* Copyright (c) 2005-2006, Jean-Sebastien Roy (js@jeannot.org)
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
static char const rcsid[] =
"@(#) $Jeannot: list_primitive.c,v 1.7 2006/02/19 13:48:34 js Exp $";
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#ifdef WIN32
/* On Windows, you must compile and link with getopt.c */
#include "getopt.h"
#else
#include <unistd.h>
#endif
#include "randomkit.h"
static void usage()
{
fprintf(stderr,
"Usage: list_primitive [-c] [-o] [-d D] N\n"
"Generate a list of binary primitive polynomials.\n"
" -c: output a zero terminated list as a C source\n"
" -o: generates polynonials out of order (~2x faster)\n"
" WARNING: if used with sobol_init, will not match the direction\n"
" numbers provided by sobol_*directions.\n"
" -d: set the maximum degree of the polynomials to D.\n"
" N: maximum number of polynomials to find.\n");
exit(EXIT_FAILURE);
}
int main(int argc, char *argv[])
{
unsigned long polynomial = 0, ooorder = 0, count;
int csource = 0, ch, line = -1, maxdegree = -1;
while ((ch = getopt(argc, argv, "cod:")) != -1)
{
switch (ch)
{
case 'c':
csource = 1;
break;
case 'o':
ooorder = 1;
break;
case 'd':
maxdegree = strtoul(optarg, NULL, 10);
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc != 1)
usage();
count = strtoul(argv[0], NULL, 10);
if (csource)
{
if (maxdegree >=0)
printf("const unsigned long primitive_polynomials_%lu_%d[] = {\n", count,
maxdegree);
else
printf("const unsigned long primitive_polynomials_%lu[] = {\n", count);
}
for (polynomial = 1UL; count && polynomial < ULONG_MAX; polynomial += 2)
{
unsigned long rev = 0;
if (maxdegree >=0)
{
unsigned long temp = polynomial >> 1;
int degree = 0;
/* Compute the degree */
for (; temp; degree++, temp >>= 1);
if (degree > maxdegree)
break;
}
if (ooorder)
{
/* Reversing the bits of a primitive polynomial give another p.p. */
unsigned long copy = polynomial;
for (; copy; copy >>= 1)
rev = (rev << 1) | (copy & 1);
if (rev < polynomial)
continue;
}
if (rk_isprimitive(polynomial))
{
count--;
if (csource)
{
if (line > -1)
{
printf(",");
if (line == 0)
printf("\n ");
}
else
line = 0;
line += printf(" 0x%lXUL", polynomial);
if (line >= (78-21))
line = 0;
}
else
printf("%lu\n", polynomial);
if (count && ooorder && rev != polynomial)
{
count--;
if (csource)
{
if (line > -1)
{
printf(",");
if (line == 0)
printf("\n ");
}
else
line = 0;
line += printf(" 0x%lXUL", rev);
if (line >= (78-21))
line = 0;
}
else
printf("%lu\n", rev);
}
}
}
if (csource)
{
if (line > -1)
printf(",");
printf("\n 0UL\n};\n");
}
return 0;
}
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