| /* Copyright (C) 2013-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Library General Public License as |
| published by the Free Software Foundation; either version 2 of the |
| License, or (at your option) any later version. |
| |
| The GNU C Library 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 |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library General Public |
| License along with the GNU C Library; see the file COPYING.LIB. If |
| not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include <math.h> |
| #include <math_private.h> |
| #include <math_ldbl_opt.h> |
| |
| double |
| __modf (double x, double *iptr) |
| { |
| if (__builtin_isinf (x)) |
| { |
| *iptr = x; |
| return __copysign (0.0, x); |
| } |
| else if (__builtin_isnan (x)) |
| { |
| *iptr = NAN; |
| return NAN; |
| } |
| |
| if (x >= 0.0) |
| { |
| *iptr = __floor (x); |
| return (x - *iptr); |
| } |
| else |
| { |
| *iptr = __ceil (x); |
| return (x - *iptr); |
| } |
| } |
| weak_alias (__modf, modf) |
| #ifdef NO_LONG_DOUBLE |
| strong_alias (__modf, __modfl) |
| weak_alias (__modf, modfl) |
| #endif |
| #ifdef IS_IN_libm |
| # if LONG_DOUBLE_COMPAT(libm, GLIBC_2_0) |
| compat_symbol (libm, __modf, modfl, GLIBC_2_0); |
| # endif |
| #elif LONG_DOUBLE_COMPAT(libc, GLIBC_2_0) |
| compat_symbol (libc, __modf, modfl, GLIBC_2_0); |
| #endif |
