pqc/external/flint-2.4.3/padic_mat/canonicalise.c

132 lines
3.2 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) 2011 Sebastian Pancratz
******************************************************************************/
#include "fmpz_mat.h"
#include "padic_poly.h"
#include "padic_mat.h"
static void
_padic_mat_canonicalise_fmpz(fmpz *vec, slong len, slong *val, const fmpz_t p)
{
int nonzero = 0;
slong i;
for (i = 0; i < len; i++)
{
if (vec[i] != WORD(0))
{
nonzero = 1;
if (!fmpz_divisible(vec + i, p))
{
return;
}
}
}
if (nonzero)
{
_fmpz_vec_scalar_divexact_fmpz(vec, vec, len, p);
(*val)++;
while (1)
{
for (i = 0; i < len; i++)
{
if (!fmpz_divisible(vec + i, p))
{
return;
}
}
_fmpz_vec_scalar_divexact_fmpz(vec, vec, len, p);
(*val)++;
}
}
else
{
*val = 0;
}
}
static void
_padic_mat_canonicalise_si(fmpz *vec, slong len, slong *val, slong p)
{
int nonzero = 0;
slong i;
for (i = 0; i < len; i++)
{
if (vec[i] != WORD(0))
{
nonzero = 1;
if (!fmpz_divisible_si(vec + i, p))
{
return;
}
}
}
if (nonzero)
{
_fmpz_vec_scalar_divexact_ui(vec, vec, len, p);
(*val)++;
while (1)
{
for (i = 0; i < len; i++)
{
if (!fmpz_divisible_si(vec + i, p))
{
return;
}
}
_fmpz_vec_scalar_divexact_ui(vec, vec, len, p);
(*val)++;
}
}
else
{
*val = 0;
}
}
void _padic_mat_canonicalise(padic_mat_t A, const padic_ctx_t ctx)
{
if (COEFF_IS_MPZ(*(ctx->p)))
{
_padic_mat_canonicalise_fmpz(padic_mat(A)->entries,
padic_mat(A)->r * padic_mat(A)->c,
&(A->val), ctx->p);
}
else
{
_padic_mat_canonicalise_si(padic_mat(A)->entries,
padic_mat(A)->r * padic_mat(A)->c,
&(A->val), *(ctx->p));
}
}