55 lines
1.6 KiB
C
55 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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slong
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fmpq_get_cfrac(fmpz * c, fmpq_t rem, const fmpq_t x, slong n)
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{
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fmpz_t p, q;
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slong i;
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fmpz_init(p);
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fmpz_init(q);
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fmpz_set(p, fmpq_numref(x));
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fmpz_set(q, fmpq_denref(x));
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for (i = 0; i < n && !fmpz_is_zero(q); i++)
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{
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fmpz_fdiv_qr(c + i, p, p, q);
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fmpz_swap(p, q);
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}
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fmpz_set(fmpq_numref(rem), q);
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fmpz_set(fmpq_denref(rem), p);
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fmpq_canonicalise(rem);
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fmpz_clear(p);
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fmpz_clear(q);
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return i;
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}
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