pqc/external/flint-2.4.3/fmpq_mat/solve_dixon.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 Fredrik Johansson
******************************************************************************/
#include "fmpq_mat.h"
int
fmpq_mat_solve_dixon(fmpq_mat_t X, const fmpq_mat_t A, const fmpq_mat_t B)
{
fmpz_mat_t Anum;
fmpz_mat_t Bnum;
fmpz_mat_t Xnum;
fmpz_t mod;
int success;
fmpz_mat_init(Anum, A->r, A->c);
fmpz_mat_init(Bnum, B->r, B->c);
fmpz_mat_init(Xnum, B->r, B->c);
fmpz_init(mod);
fmpq_mat_get_fmpz_mat_rowwise_2(Anum, Bnum, NULL, A, B);
success = fmpz_mat_solve_dixon(Xnum, mod, Anum, Bnum);
if (success)
success = fmpq_mat_set_fmpz_mat_mod_fmpz(X, Xnum, mod);
fmpz_mat_clear(Anum);
fmpz_mat_clear(Bnum);
fmpz_mat_clear(Xnum);
fmpz_clear(mod);
return success;
}