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https://github.com/vale981/arb
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6bf072eb59
This will allow us to not loose the julia session on error. See also https://github.com/wbhart/flint2/pull/243
42 lines
1 KiB
C
42 lines
1 KiB
C
/*
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Copyright (C) 2012 Fredrik Johansson
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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 it under
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the terms of the GNU Lesser General Public License (LGPL) as published
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by the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version. See <http://www.gnu.org/licenses/>.
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*/
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#include "fmpr.h"
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void
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fmpr_get_fmpq(fmpq_t y, const fmpr_t x)
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{
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if (fmpr_is_zero(x))
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{
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fmpq_zero(y);
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}
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else if (fmpr_is_special(x) || COEFF_IS_MPZ(*fmpr_expref(x)))
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{
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flint_printf("exception: fmpr_get_fmpq: cannot convert to rational\n");
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flint_abort();
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}
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else
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{
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slong exp = *fmpr_expref(x);
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fmpz_set_ui(fmpq_denref(y), UWORD(1));
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if (exp >= 0)
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{
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fmpz_mul_2exp(fmpq_numref(y), fmpr_manref(x), exp);
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}
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else
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{
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fmpz_set(fmpq_numref(y), fmpr_manref(x));
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fmpz_mul_2exp(fmpq_denref(y), fmpq_denref(y), -exp);
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}
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}
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}
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