Mercurial > gnulib
view lib/modf.c @ 40201:24f6637d57d0
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author | Karl Berry <karl@freefriends.org> |
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date | Sun, 24 Feb 2019 08:05:56 -0800 |
parents | b06060465f09 |
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/* Get signed integer and fractional parts of a floating-point number. Copyright (C) 2012-2019 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 <https://www.gnu.org/licenses/>. */ #include <config.h> /* Specification. */ #include <math.h> double modf (double x, double *iptr) { if (isfinite (x)) { double integer_part = trunc (x); *iptr = integer_part; return x - integer_part; } else { if (isinf (x)) { *iptr = x; return 1.0 / x; } else /* isnand (x) */ { *iptr = x; return x; } } }