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45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
/* Round float value to long long int.
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Copyright (C) 1997-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <math.h>
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/* Round to the nearest integer, with values exactly on a 0.5 boundary
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rounded away from zero, regardless of the current rounding mode.
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If (long long)x, when x is out of range of a long long, clips at
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LLONG_MAX or LLONG_MIN, then this implementation also clips. */
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long long int
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__llroundf (float x)
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{
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long long xr = (long long) x;
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float xrf = (float) xr;
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if (x >= 0.0)
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{
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if (x - xrf >= 0.5)
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xr += (long long) ((unsigned long long) xr + 1) > 0;
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}
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else
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{
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if (xrf - x >= 0.5)
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xr -= (long long) ((unsigned long long) xr - 1) < 0;
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}
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return xr;
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}
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weak_alias (__llroundf, llroundf)
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