88 lines
2.3 KiB
C
88 lines
2.3 KiB
C
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/*=============================================================================
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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) 2010, 2011 Sebastian Pancratz
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******************************************************************************/
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#include <stdlib.h>
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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_vec.h"
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#include "fmpz_poly.h"
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void
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_fmpz_poly_rem(fmpz * R, const fmpz * A, slong lenA, const fmpz * B, slong lenB)
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{
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if (lenA < 15)
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{
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_fmpz_poly_rem_basecase(R, A, lenA, B, lenB);
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}
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else
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{
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fmpz *Q = _fmpz_vec_init(lenA - lenB + 1);
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_fmpz_poly_divrem(Q, R, A, lenA, B, lenB);
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_fmpz_vec_clear(Q, lenA - lenB + 1);
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}
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}
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void fmpz_poly_rem(fmpz_poly_t R, const fmpz_poly_t A, const fmpz_poly_t B)
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{
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const slong lenA = A->length, lenB = B->length;
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fmpz *r;
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if (lenB == 0)
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{
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flint_printf("Exception (fmpz_poly_rem). Division by zero.\n");
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abort();
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}
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if (lenA < lenB)
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{
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fmpz_poly_set(R, A);
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return;
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}
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if (R == A || R == B)
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{
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r = _fmpz_vec_init(lenA);
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}
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else
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{
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fmpz_poly_fit_length(R, lenA);
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r = R->coeffs;
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}
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_fmpz_poly_rem(r, A->coeffs, lenA, B->coeffs, lenB);
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if (R == A || R == B)
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{
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_fmpz_vec_clear(R->coeffs, R->alloc);
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R->coeffs = r;
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R->alloc = lenB - 1;
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}
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_fmpz_poly_set_length(R, lenA);
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_fmpz_poly_normalise(R);
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}
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