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

64 lines
2.2 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) 2012 Sebastian Pancratz
******************************************************************************/
#include "padic_mat.h"
void padic_mat_get_fmpq_mat(fmpq_mat_t B,
const padic_mat_t A, const padic_ctx_t ctx)
{
if (!padic_mat_is_empty(A))
{
if (padic_mat_is_zero(A))
{
fmpq_mat_zero(B);
}
else
{
fmpz_t f;
slong i, j;
fmpz_init(f);
fmpz_pow_ui(f, ctx->p, FLINT_ABS(padic_mat_val(A)));
for (i = 0; i < B->r; i++)
for (j = 0; j < B->c; j++)
{
if (padic_mat_val(A) >= 0)
{
fmpz_mul(fmpq_mat_entry_num(B, i, j), padic_mat_entry(A, i, j), f);
fmpz_one(fmpq_mat_entry_den(B, i, j));
}
else
{
fmpz_set(fmpq_mat_entry_num(B, i, j), padic_mat_entry(A, i, j));
fmpz_set(fmpq_mat_entry_den(B, i, j), f);
fmpq_canonicalise(fmpq_mat_entry(B, i, j));
}
}
fmpz_clear(f);
}
}
}