2 .\" Copyright (c) 2006 The NetBSD Foundation, Inc.
3 .\" All rights reserved.
5 .\" This code is derived from software contributed to The NetBSD Foundation
8 .\" Redistribution and use in source and binary forms, with or without
9 .\" modification, are permitted provided that the following conditions
11 .\" 1. Redistributions of source code must retain the above copyright
12 .\" notice, this list of conditions and the following disclaimer.
13 .\" 2. Redistributions in binary form must reproduce the above copyright
14 .\" notice, this list of conditions and the following disclaimer in the
15 .\" documentation and/or other materials provided with the distribution.
16 .\" 3. All advertising materials mentioning features or use of this software
17 .\" must display the following acknowledgement:
18 .\" This product includes software developed by the NetBSD
19 .\" Foundation, Inc. and its contributors.
20 .\" 4. Neither the name of The NetBSD Foundation nor the names of its
21 .\" contributors may be used to endorse or promote products derived
22 .\" from this software without specific prior written permission.
24 .\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
25 .\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
26 .\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
27 .\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
28 .\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 .\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 .\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 .\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 .\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 .\" POSSIBILITY OF SUCH DAMAGE.
36 .\" $NetBSD: nan.3,v 1.1 2006/03/15 22:07:09 kleink Exp $
37 .\" $DragonFly: src/lib/libm/gen/nan.3,v 1.1 2007/06/17 17:46:01 pavalos Exp $
52 .Fn nan "const char *tagp"
54 .Fn nanf "const char *tagp"
56 .Fn nanl "const char *tagp"
59 .Fn nan "\*qn-char-sequence\*q"
60 is equivalent to the call
61 .Fn strtod "\*qNAN(n-char-sequence)\*q" "NULL" .
64 is equivalent to the call
65 .Fn strtod "\*qNAN()\*q" "NULL" .
71 functions are equivalent to
82 functions return a quiet NaN as specified by
90 functions return zero.