63 lines
1.6 KiB
C
63 lines
1.6 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) 2011 Fredrik Johansson
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******************************************************************************/
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#include "fmpq.h"
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void _fmpq_canonicalise(fmpz_t num, fmpz_t den)
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{
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fmpz_t u;
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if (fmpz_is_one(den))
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return;
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if (fmpz_is_zero(num))
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{
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fmpz_one(den);
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return;
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}
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fmpz_init(u);
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fmpz_gcd(u, num, den);
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if (!fmpz_is_one(u))
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{
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fmpz_divexact(num, num, u);
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fmpz_divexact(den, den, u);
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}
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fmpz_clear(u);
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if (fmpz_sgn(den) < 0)
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{
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fmpz_neg(num, num);
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fmpz_neg(den, den);
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}
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}
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void fmpq_canonicalise(fmpq_t res)
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{
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_fmpq_canonicalise(fmpq_numref(res), fmpq_denref(res));
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}
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