pqc/external/flint-2.4.3/fmpq_mat/set_fmpz_mat_div_fmpz.c
2014-05-24 23:16:06 +02:00

70 lines
2.1 KiB
C

/*=============================================================================
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_set_fmpz_mat_div_fmpz(fmpq_mat_t X, const fmpz_mat_t Xnum,
const fmpz_t den)
{
slong i, j;
if (fmpz_is_one(den))
{
fmpq_mat_set_fmpz_mat(X, Xnum);
}
else if (*den == WORD(-1))
{
fmpz_t t;
fmpz_init(t);
fmpz_set(t, den);
for (i = 0; i < Xnum->r; i++)
{
for (j = 0; j < Xnum->c; j++)
{
fmpz_neg(fmpq_mat_entry_num(X, i, j),
fmpz_mat_entry(Xnum, i, j));
fmpz_one(fmpq_mat_entry_den(X, i, j));
}
}
fmpz_clear(t);
}
else
{
for (i = 0; i < Xnum->r; i++)
{
for (j = 0; j < Xnum->c; j++)
{
fmpz_set(fmpq_mat_entry_num(X, i, j),
fmpz_mat_entry(Xnum, i, j));
fmpz_set(fmpq_mat_entry_den(X, i, j), den);
fmpq_canonicalise(fmpq_mat_entry(X, i, j));
}
}
}
}