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bc9f6000 UD |
1 | /* Return quiet nan. |
2 | Copyright (C) 1997 Free Software Foundation, Inc. | |
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 AJ |
16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, write to the Free | |
18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
19 | 02111-1307 USA. */ | |
bc9f6000 | 20 | |
bc9f6000 | 21 | #include <math.h> |
26dee9c4 | 22 | #include <stdio.h> |
22d57dd3 UD |
23 | #include <stdlib.h> |
24 | #include <string.h> | |
25 | #include <ieee754.h> | |
bc9f6000 UD |
26 | |
27 | ||
28 | long double | |
3e5f5557 | 29 | __nanl (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 strtold (buf, NULL); | |
36 | } | |
37 | ||
6973fc01 | 38 | return NAN; |
bc9f6000 | 39 | } |
3e5f5557 | 40 | weak_alias (__nanl, nanl) |