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/*
Copyright (C) 2012 Fredrik Johansson
This file is part of Arb.
Arb is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version. See <http://www.gnu.org/licenses/>.
*/
#include "fmpr.h"
void
fmpr_get_fmpq(fmpq_t y, const fmpr_t x)
{
if (fmpr_is_zero(x))
{
fmpq_zero(y);
}
else if (fmpr_is_special(x) || COEFF_IS_MPZ(*fmpr_expref(x)))
{
flint_printf("exception: fmpr_get_fmpq: cannot convert to rational\n");
flint_abort();
}
else
{
slong exp = *fmpr_expref(x);
fmpz_set_ui(fmpq_denref(y), UWORD(1));
if (exp >= 0)
{
fmpz_mul_2exp(fmpq_numref(y), fmpr_manref(x), exp);
}
else
{
fmpz_set(fmpq_numref(y), fmpr_manref(x));
fmpz_mul_2exp(fmpq_denref(y), fmpq_denref(y), -exp);
}
}
}
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