Mercurial > gnulib
view lib/modfl.c @ 17249:e542fd46ad6f
maint: update all copyright year number ranges
Run "make update-copyright". Compare to commit 1602f0a from last year.
Signed-off-by: Eric Blake <eblake@redhat.com>
author | Eric Blake <eblake@redhat.com> |
---|---|
date | Tue, 01 Jan 2013 00:50:58 +0000 |
parents | d2bb16b4df01 |
children | 344018b6e5d7 |
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/* Get signed integer and fractional parts of a floating-point number. Copyright (C) 2012-2013 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> #if HAVE_SAME_LONG_DOUBLE_AS_DOUBLE long double modfl (long double x, long double *iptr) { double integer_part; double fractional_part = modf (x, &integer_part); *iptr = integer_part; return fractional_part; } #else long double modfl (long double x, long double *iptr) { if (isfinite (x)) { long double integer_part = truncl (x); *iptr = integer_part; return x - integer_part; } else { if (isinf (x)) { *iptr = x; return 1.0L / x; } else /* isnanl (x) */ { *iptr = x; return x; } } } #endif