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005de2e827
* Makefile.am (EXTRA_DIST): Add `m4/gnulib-cache.m4'. * build-aux/git-version-gen: Keep unchanged.
38 lines
1.1 KiB
C
38 lines
1.1 KiB
C
/* Logarithm.
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Copyright (C) 2012 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <config.h>
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/* Specification. */
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#include <math.h>
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double
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log (double x)
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#undef log
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{
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if (x <= 0.0)
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{
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/* Work around the OSF/1 5.1 bug. */
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if (x == 0.0)
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/* Return -Infinity. */
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return -1.0 / 0.0;
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/* Work around the NetBSD 5.1, Solaris 11 2011-11 bug. */
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else /* x < 0.0 */
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/* Return NaN. */
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return 0.0 / 0.0;
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}
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return log (x);
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}
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