61 lines
1.7 KiB
C
61 lines
1.7 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) 2012 William Hart
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******************************************************************************/
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#include <gmp.h>
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#include "flint.h"
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#include "ulong_extras.h"
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#include "fmpz.h"
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int
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fmpz_jacobi(const fmpz_t a, const fmpz_t p)
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{
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fmpz c = *p;
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fmpz d = *a;
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mpz_t t, u;
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int r;
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if (d == 0)
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return 0;
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if (c == 2)
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return 1;
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if (!COEFF_IS_MPZ(c) && !COEFF_IS_MPZ(d))
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return n_jacobi(d, c);
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if (COEFF_IS_MPZ(c) && COEFF_IS_MPZ(d))
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return mpz_jacobi(COEFF_TO_PTR(d), COEFF_TO_PTR(c));
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flint_mpz_init_set_readonly(t, a);
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flint_mpz_init_set_readonly(u, p);
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r = mpz_jacobi(t, u);
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flint_mpz_clear_readonly(t);
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flint_mpz_clear_readonly(u);
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return r;
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}
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