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/*
Copyright (C) 2011, 2012 Sebastian Pancratz
This file is part of FLINT.
FLINT is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version. See <https://www.gnu.org/licenses/>.
*/
#include "fmpz_vec.h"
#include "padic.h"
#include "padic_poly.h"
void padic_poly_reduce(padic_poly_t poly, const padic_ctx_t ctx)
{
const slong N = padic_poly_prec(poly);
if (poly->length > 0)
{
if (poly->val >= N)
{
padic_poly_zero(poly);
}
else
{
fmpz_t pow;
int alloc;
alloc = _padic_ctx_pow_ui(pow, N - poly->val, ctx);
_fmpz_vec_scalar_mod_fmpz(poly->coeffs, poly->coeffs, poly->length, pow);
if (alloc)
fmpz_clear(pow);
_padic_poly_normalise(poly);
if (poly->length == 0)
{
poly->val = 0;
}
}
}
}