mirror of
https://github.com/vale981/arb
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58 lines
1.7 KiB
C
58 lines
1.7 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) 2014 Fredrik Johansson
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******************************************************************************/
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#include "arf.h"
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void
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arf_ceil(arf_t z, const arf_t x)
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{
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if (arf_is_special(x) || arf_is_int(x))
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{
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arf_set(z, x);
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}
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else
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{
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long exp = ARF_EXP(x);
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/* now exp cannot be too large, as we would have
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caught this in arf_is_int() */
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if (COEFF_IS_MPZ(exp) || exp <= 0)
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{
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if (ARF_SGNBIT(x))
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arf_zero(z);
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else
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arf_one(z);
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}
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else if (exp == 1)
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{
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arf_set_si(z, ARF_SGNBIT(x) ? -1 : 2);
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}
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else
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{
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arf_set_round(z, x, exp, ARF_RND_CEIL);
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}
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}
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}
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