mirror of
https://github.com/vale981/arb
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41 lines
954 B
C
41 lines
954 B
C
/*
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Copyright (C) 2014 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 "arf.h"
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int
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_arf_set_mpn_fixed(arf_t z, mp_srcptr xp, mp_size_t xn,
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mp_size_t fixn, int negative, slong prec, arf_rnd_t rnd)
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{
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slong exp, exp_shift;
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int inexact;
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exp = (slong)(xn - fixn) * FLINT_BITS;
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while (xn > 0 && xp[xn-1] == 0)
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{
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xn--;
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exp -= FLINT_BITS;
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}
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if (xn == 0)
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{
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arf_zero(z);
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return 0;
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}
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else
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{
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inexact = _arf_set_round_mpn(z, &exp_shift, xp, xn, negative, prec, rnd);
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fmpz_set_si(ARF_EXPREF(z), exp + exp_shift);
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return inexact;
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}
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}
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