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/*=============================================================================
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_mat.h"
void padic_mat_set_entry_padic(padic_mat_t rop, slong i, slong j,
const padic_t op, const padic_ctx_t ctx)
{
if (padic_is_zero(op))
{
fmpz_zero(padic_mat_entry(rop, i, j));
_padic_mat_canonicalise(rop, ctx);
return;
}
if (padic_mat_val(rop) == padic_val(op))
{
fmpz_set(padic_mat_entry(rop, i, j), padic_unit(op));
}
else if (padic_mat_val(rop) < padic_val(op))
{
fmpz_t t;
fmpz_init(t);
fmpz_pow_ui(t, ctx->p, padic_val(op) - padic_mat_val(rop));
fmpz_mul(padic_mat_entry(rop, i, j), padic_unit(op), t);
fmpz_clear(t);
_padic_mat_canonicalise(rop, ctx);
}
else /* rop->val > op->val */
{
fmpz_t pow;
fmpz_init(pow);
fmpz_pow_ui(pow, ctx->p, padic_mat_val(rop) - padic_val(op));
_fmpz_vec_scalar_mul_fmpz(padic_mat(rop)->entries,
padic_mat(rop)->entries,
padic_mat(rop)->r * padic_mat(rop)->c, pow);
fmpz_clear(pow);
fmpz_set(padic_mat_entry(rop, i, j), padic_unit(op));
padic_mat_val(rop) = padic_val(op);
}
}
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