mirror of
https://github.com/vale981/arb
synced 2025-03-06 01:41:39 -05:00
67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
/*=============================================================================
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This file is part of ARB.
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ARB 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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ARB 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 ARB; 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 "arf.h"
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void
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arf_get_fmpq(fmpq_t y, const arf_t x)
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{
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if (arf_is_zero(x))
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{
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fmpq_zero(y);
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}
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else if (arf_is_special(x) || !ARF_IS_LAGOM(x))
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{
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flint_printf("exception: arf_get_fmpq: cannot convert to rational\n");
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abort();
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}
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else
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{
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fmpz_t man, exp;
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slong e;
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fmpz_init(man);
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fmpz_init(exp);
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arf_get_fmpz_2exp(man, exp, x);
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e = *exp;
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fmpz_set_ui(fmpq_denref(y), UWORD(1));
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if (e >= 0)
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{
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fmpz_mul_2exp(fmpq_numref(y), man, e);
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}
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else
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{
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fmpz_set(fmpq_numref(y), man);
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fmpz_mul_2exp(fmpq_denref(y), fmpq_denref(y), -e);
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}
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fmpz_clear(man);
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fmpz_clear(exp);
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}
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}
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