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bc9f6000 | 1 | /* Return quiet nan. |
b168057a | 2 | Copyright (C) 1997-2015 Free Software Foundation, Inc. |
bc9f6000 UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
bc9f6000 UD |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
bc9f6000 | 15 | |
41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
bc9f6000 | 19 | |
bc9f6000 | 20 | #include <math.h> |
26dee9c4 | 21 | #include <stdio.h> |
22d57dd3 UD |
22 | #include <stdlib.h> |
23 | #include <string.h> | |
24 | #include <ieee754.h> | |
bc9f6000 UD |
25 | |
26 | ||
ee2aafe0 | 27 | #undef __nanf |
bc9f6000 | 28 | float |
3e5f5557 | 29 | __nanf (const char *tagp) |
bc9f6000 | 30 | { |
22d57dd3 UD |
31 | if (tagp[0] != '\0') |
32 | { | |
33 | char buf[6 + strlen (tagp)]; | |
34 | sprintf (buf, "NAN(%s)", tagp); | |
35 | return strtof (buf, NULL); | |
36 | } | |
37 | ||
6973fc01 | 38 | return NAN; |
bc9f6000 | 39 | } |
3e5f5557 | 40 | weak_alias (__nanf, nanf) |