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 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