mirror of
https://github.com/vale981/arb
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71 lines
2 KiB
C
71 lines
2 KiB
C
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/*=============================================================================
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This file is part of ARB.
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ARB is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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ARB is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with ARB; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2010 Sebastian Pancratz
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Copyright (C) 2012 Fredrik Johansson
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******************************************************************************/
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#include "fmprb_poly.h"
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void
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_fmprb_poly_evaluate(fmprb_t res, const fmprb_struct * f, long len,
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const fmprb_t a, long prec)
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{
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if (len == 0)
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{
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fmprb_zero(res);
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}
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else if (len == 1 || fmprb_is_zero(a))
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{
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fmprb_set(res, f);
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}
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else
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{
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long i = len - 1;
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fmprb_t t;
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fmprb_init(t);
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fmprb_set(res, f + i);
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for (i = len - 2; i >= 0; i--)
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{
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fmprb_mul(t, res, a, prec);
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fmprb_add(res, f + i, t, prec);
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}
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fmprb_clear(t);
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}
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}
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void
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fmprb_poly_evaluate(fmprb_t res, const fmprb_poly_t f, const fmprb_t a, long prec)
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{
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if (res == a)
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{
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fmprb_t t;
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fmprb_init(t);
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_fmprb_poly_evaluate(t, f->coeffs, f->length, a, prec);
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fmprb_swap(res, t);
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fmprb_clear(t);
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}
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else
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_fmprb_poly_evaluate(res, f->coeffs, f->length, a, prec);
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}
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