projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| d4697bc9 | 1 | /* Copyright (C) 2013-2014 Free Software Foundation, Inc. |
| 3c026539 AZ |
2 | This file is part of the GNU C Library |
| 3 | ||
| 4 | The GNU C Library is free software; you can redistribute it and/or | |
| 5 | modify it under the terms of the GNU Library General Public License as | |
| 6 | published by the Free Software Foundation; either version 2 of the | |
| 7 | License, or (at your option) any later version. | |
| 8 | ||
| 9 | The GNU C Library is distributed in the hope that it will be useful, | |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | Library General Public License for more details. | |
| 13 | ||
| 14 | You should have received a copy of the GNU Library General Public | |
| 15 | License along with the GNU C Library; see the file COPYING.LIB. If | |
| 16 | not, see <http://www.gnu.org/licenses/>. */ | |
| 17 | ||
| 18 | #include <math.h> | |
| 19 | #include <math_private.h> | |
| 20 | #include <math_ldbl_opt.h> | |
| 21 | ||
| 22 | double | |
| 23 | __modf (double x, double *iptr) | |
| 24 | { | |
| 25 | if (__builtin_isinf (x)) | |
| 26 | { | |
| 27 | *iptr = x; | |
| 28 | return __copysign (0.0, x); | |
| 29 | } | |
| 30 | else if (__builtin_isnan (x)) | |
| 31 | { | |
| 32 | *iptr = NAN; | |
| 33 | return NAN; | |
| 34 | } | |
| 35 | ||
| 36 | if (x >= 0.0) | |
| 37 | { | |
| 38 | *iptr = __floor (x); | |
| 39 | return (x - *iptr); | |
| 40 | } | |
| 41 | else | |
| 42 | { | |
| 43 | *iptr = __ceil (x); | |
| 44 | return (x - *iptr); | |
| 45 | } | |
| 46 | } | |
| 47 | weak_alias (__modf, modf) | |
| 48 | #ifdef NO_LONG_DOUBLE | |
| 49 | strong_alias (__modf, __modfl) | |
| 50 | weak_alias (__modf, modfl) | |
| 51 | #endif | |
| 52 | #ifdef IS_IN_libm | |
| 53 | # if LONG_DOUBLE_COMPAT(libm, GLIBC_2_0) | |
| 54 | compat_symbol (libm, __modf, modfl, GLIBC_2_0); | |
| 55 | # endif | |
| 56 | #elif LONG_DOUBLE_COMPAT(libc, GLIBC_2_0) | |
| 57 | compat_symbol (libc, __modf, modfl, GLIBC_2_0); | |
| 58 | #endif |