69 lines
2.0 KiB
C
69 lines
2.0 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_vec.h"
|
|
#include "fmpq_poly.h"
|
|
#include "padic_poly.h"
|
|
|
|
void padic_poly_set_fmpq_poly(padic_poly_t f,
|
|
const fmpq_poly_t g, const padic_ctx_t ctx)
|
|
{
|
|
const slong len = g->length;
|
|
|
|
if (len == 0)
|
|
{
|
|
padic_poly_zero(f);
|
|
}
|
|
else
|
|
{
|
|
const slong N = padic_poly_prec(f);
|
|
fmpz_t t;
|
|
|
|
fmpz_init(t);
|
|
|
|
f->val = - fmpz_remove(t, g->den, ctx->p);
|
|
|
|
if (f->val < N)
|
|
{
|
|
padic_poly_fit_length(f, len);
|
|
_padic_poly_set_length(f, len);
|
|
|
|
_padic_inv(t, t, ctx->p, N - f->val);
|
|
_fmpz_vec_scalar_mul_fmpz(f->coeffs, g->coeffs, len, t);
|
|
if (f->val == 0)
|
|
padic_poly_canonicalise(f, ctx->p);
|
|
|
|
padic_poly_reduce(f, ctx);
|
|
}
|
|
else
|
|
{
|
|
padic_poly_zero(f);
|
|
}
|
|
|
|
fmpz_clear(t);
|
|
}
|
|
}
|
|
|