1 /* $NetBSD: hypot.cpp,v 1.1.1.1 2016/01/13 18:41:48 christos Exp $ */
2
3 /* Copyright (C) 2005 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Library General Public License as
8 published by the Free Software Foundation; either version 2 of the
9 License, or (at your option) any later version.
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
14 Library General Public License for more details.
15
16 You should have received a copy of the GNU Library General Public
17 License along with the GNU C Library; see the file COPYING.LIB. If
18 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
19 Cambridge, MA 02139, USA. */
20
21 #ifdef HAVE_CONFIG_H
22 #include <config.h>
23 #endif
24
25 #include <math.h>
26
27 #ifdef NEED_DECLARATION_HYPOT
28 double hypot(double, double);
29 #endif /* NEED_DECLARATION_HYPOT */
30
groff_hypot(double x,double y)31 double groff_hypot(double x, double y)
32 {
33 double result = hypot(x, y);
34
35 #ifdef __INTERIX
36 /* hypot() on Interix is broken */
37 if (isnan(result) && !isnan(x) && !isnan(y))
38 return 0.0;
39 #endif
40
41 return result;
42 }
43