pqc/external/flint-2.4.3/fmpq_mat/mul_r_fmpz_mat.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"
void
fmpq_mat_mul_r_fmpz_mat(fmpq_mat_t C, const fmpz_mat_t A, const fmpq_mat_t B)
{
slong i, j;
fmpz_mat_t Bclear;
fmpz_mat_t Cclear;
fmpz * Bden;
fmpz_mat_init(Bclear, B->r, B->c);
fmpz_mat_init(Cclear, A->r, B->c);
Bden = _fmpz_vec_init(B->c);
fmpq_mat_get_fmpz_mat_colwise(Bclear, Bden, B);
fmpz_mat_mul(Cclear, A, Bclear);
for (i = 0; i < C->r; i++)
{
for (j = 0; j < C->c; j++)
{
fmpz_set(fmpq_mat_entry_num(C, i, j), fmpz_mat_entry(Cclear, i, j));
fmpz_set(fmpq_mat_entry_den(C, i, j), Bden + j);
fmpq_canonicalise(fmpq_mat_entry(C, i, j));
}
}
fmpz_mat_clear(Bclear);
fmpz_mat_clear(Cclear);
_fmpz_vec_clear(Bden, B->c);
}