1*05a0b428SJohn Marino /* $OpenBSD: s_fdim.c,v 1.5 2012/12/05 23:20:04 deraadt Exp $ */ 2*05a0b428SJohn Marino /*- 3*05a0b428SJohn Marino * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG> 4*05a0b428SJohn Marino * All rights reserved. 5*05a0b428SJohn Marino * 6*05a0b428SJohn Marino * Redistribution and use in source and binary forms, with or without 7*05a0b428SJohn Marino * modification, are permitted provided that the following conditions 8*05a0b428SJohn Marino * are met: 9*05a0b428SJohn Marino * 1. Redistributions of source code must retain the above copyright 10*05a0b428SJohn Marino * notice, this list of conditions and the following disclaimer. 11*05a0b428SJohn Marino * 2. Redistributions in binary form must reproduce the above copyright 12*05a0b428SJohn Marino * notice, this list of conditions and the following disclaimer in the 13*05a0b428SJohn Marino * documentation and/or other materials provided with the distribution. 14*05a0b428SJohn Marino * 15*05a0b428SJohn Marino * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16*05a0b428SJohn Marino * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17*05a0b428SJohn Marino * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18*05a0b428SJohn Marino * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19*05a0b428SJohn Marino * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20*05a0b428SJohn Marino * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21*05a0b428SJohn Marino * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22*05a0b428SJohn Marino * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23*05a0b428SJohn Marino * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24*05a0b428SJohn Marino * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25*05a0b428SJohn Marino * SUCH DAMAGE. 26*05a0b428SJohn Marino */ 27*05a0b428SJohn Marino 28*05a0b428SJohn Marino #include <float.h> 29*05a0b428SJohn Marino #include <math.h> 30*05a0b428SJohn Marino 31*05a0b428SJohn Marino #define DECL(type, fn) \ 32*05a0b428SJohn Marino type \ 33*05a0b428SJohn Marino fn(type x, type y) \ 34*05a0b428SJohn Marino { \ 35*05a0b428SJohn Marino \ 36*05a0b428SJohn Marino if (isnan(x)) \ 37*05a0b428SJohn Marino return (x); \ 38*05a0b428SJohn Marino if (isnan(y)) \ 39*05a0b428SJohn Marino return (y); \ 40*05a0b428SJohn Marino return (x > y ? x - y : 0.0); \ 41*05a0b428SJohn Marino } 42*05a0b428SJohn Marino 43*05a0b428SJohn Marino DECL(double, fdim) 44*05a0b428SJohn Marino DECL(float, fdimf) 45*05a0b428SJohn Marino DECL(long double, fdiml) 46