mirror of
https://github.com/vale981/arb
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49 lines
1 KiB
C
49 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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int
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fmpr_get_fmpz_fixed_fmpz(fmpz_t y, const fmpr_t x, const fmpz_t exp)
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{
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slong shift;
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if (fmpr_is_zero(x))
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{
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fmpz_zero(y);
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return 0;
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}
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shift = _fmpz_sub_small(fmpr_expref(x), exp);
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if (shift >= 0)
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{
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fmpz_mul_2exp(y, fmpr_manref(x), shift);
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return 0;
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}
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else
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{
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fmpz_tdiv_q_2exp(y, fmpr_manref(x), -shift);
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return 1;
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}
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}
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int
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fmpr_get_fmpz_fixed_si(fmpz_t y, const fmpr_t x, slong exp)
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{
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int result;
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fmpz_t t;
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fmpz_init(t);
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fmpz_set_si(t, exp);
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result = fmpr_get_fmpz_fixed_fmpz(y, x, t);
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fmpz_clear(t);
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return result;
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}
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