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author | Bruno Haible <bruno@clisp.org> | 2012-03-10 22:28:49 +0100 |
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committer | Bruno Haible <bruno@clisp.org> | 2012-03-11 02:40:32 +0100 |
commit | 6a2bdd8e10abd669186bf2d618bfb1f106c8fcb7 (patch) | |
tree | d58737ec5f015ecd6ae636053aa9b40669c9c2ca /lib/log1pf.c | |
parent | f846e191ec7ffc638fc2ebbc6fdfa7f75e37d179 (diff) | |
download | gnulib-6a2bdd8e10abd669186bf2d618bfb1f106c8fcb7.tar.gz |
New module 'log1pf'.
* lib/math.in.h (log1pf): New declaration.
* lib/log1pf.c: New file.
* m4/log1pf.m4: New file.
* m4/math_h.m4 (gl_MATH_H): Test whether log1pf is declared.
(gl_MATH_H_DEFAULTS): Initialize GNULIB_LOG1PF, HAVE_LOG1PF,
REPLACE_LOG1PF.
* modules/math (Makefile.am): Substitute GNULIB_LOG1PF, HAVE_LOG1PF,
REPLACE_LOG1PF.
* modules/log1pf: New file.
* tests/test-math-c++.cc: Check the declaration of log1pf.
* doc/posix-functions/log1pf.texi: Mention the new module.
Diffstat (limited to 'lib/log1pf.c')
-rw-r--r-- | lib/log1pf.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/lib/log1pf.c b/lib/log1pf.c new file mode 100644 index 0000000000..4d889faa2d --- /dev/null +++ b/lib/log1pf.c @@ -0,0 +1,26 @@ +/* Natural logarithm of 1 plus argument. + Copyright (C) 2012 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +#include <config.h> + +/* Specification. */ +#include <math.h> + +float +log1pf (float x) +{ + return (float) log1p ((double) x); +} |