61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
/*=============================================================================
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This file is part of FLINT.
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FLINT 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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FLINT 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 FLINT; 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) 2012 Fredrik Johansson
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******************************************************************************/
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#include <gmp.h>
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#include "flint.h"
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#include "fmpz.h"
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#include "fmpz_poly.h"
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#include "nmod_poly.h"
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void
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_fmpz_poly_taylor_shift_divconquer(fmpz * poly, const fmpz_t c, slong len)
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{
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fmpz d[2];
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if (len <= 1 || fmpz_is_zero(c))
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return;
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if (len == 2)
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{
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fmpz_addmul(poly, poly + 1, c);
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return;
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}
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d[0] = *c;
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d[1] = 1;
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_fmpz_poly_compose_divconquer(poly, poly, len, d, 2);
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}
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void
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fmpz_poly_taylor_shift_divconquer(fmpz_poly_t g, const fmpz_poly_t f,
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const fmpz_t c)
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{
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if (f != g)
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fmpz_poly_set(g, f);
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_fmpz_poly_taylor_shift_divconquer(g->coeffs, c, g->length);
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}
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