pqc/external/flint-2.4.3/examples/fmpz_poly_factor_zassenhaus.c

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2014-05-18 22:03:37 +00:00
/*=============================================================================
This file is part of FLINT.
FLINT 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.
FLINT 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 FLINT; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
=============================================================================*/
/******************************************************************************
Copyright (C) 2011 Andy Novocin
Copyright (C) 2011 Sebastian Pancratz
******************************************************************************/
/*
Example program demonstrating the Zassenhaus factoring algorithm.
*/
#include <stdio.h>
#include "flint.h"
#include "fmpz_poly.h"
#include "nmod_poly.h"
#include "ulong_extras.h"
int main(void)
{
fmpz_poly_t f;
fmpz_poly_factor_t facs;
fmpz_poly_init(f);
fmpz_poly_factor_init(facs);
if (0)
{
FILE *polyfile;
polyfile = fopen("examples/fmpz_poly_hensel_P1", "r");
if (!polyfile)
{
flint_printf("Error. Could not read P1 from file.\n");
abort();
}
fmpz_poly_fread(polyfile, f);
}
fmpz_poly_set_str(f, "63 1 1 1 -4 -7 -2 -6 -3 -7 18 7 25 -11 95 36 21 16 69 56 35 36 32 33 26 -26 -15 -14 -53 -96 67 72 -67 40 -79 -116 -452 -312 -260 -29 -1393 327 69 -28 -241 230 -54 -309 -125 -74 -450 -69 -3 66 -27 73 68 50 -63 -1290 372 31 -16 2");
fmpz_poly_factor_zassenhaus(facs, f);
flint_printf("Polynomial:\n");
fmpz_poly_print(f);
flint_printf("\nFactorisation:\n");
fmpz_poly_factor_print(facs);
fmpz_poly_clear(f);
fmpz_poly_factor_clear(facs);
return EXIT_SUCCESS;
}