git://sourceware.org / newlib-cygwin.git / blame
| Commit | Line | Data |
|---|---|---|
| 67b376ad AU |
1 | /* $NetBSD: ctanhl.c,v 1.1 2014/10/10 00:48:18 christos Exp $ */ |
| 2 | ||
| 3 | /*- | |
| 4 | * Copyright (c) 2007 The NetBSD Foundation, Inc. | |
| 5 | * All rights reserved. | |
| 6 | * | |
| 7 | * This code is derived from software written by Stephen L. Moshier. | |
| 8 | * It is redistributed by the NetBSD Foundation by permission of the author. | |
| 9 | * | |
| 10 | * Redistribution and use in source and binary forms, with or without | |
| 11 | * modification, are permitted provided that the following conditions | |
| 12 | * are met: | |
| 13 | * 1. Redistributions of source code must retain the above copyright | |
| 14 | * notice, this list of conditions and the following disclaimer. | |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 16 | * notice, this list of conditions and the following disclaimer in the | |
| 17 | * documentation and/or other materials provided with the distribution. | |
| 18 | * | |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS | |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED | |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS | |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 29 | * POSSIBILITY OF SUCH DAMAGE. | |
| 30 | */ | |
| 31 | ||
| 32 | #include <complex.h> | |
| 33 | #include <math.h> | |
| 34 | ||
| 1ed15161 PM |
35 | /* On platforms where long double is as wide as double. */ |
| 36 | #ifdef _LDBL_EQ_DBL | |
| 67b376ad AU |
37 | long double complex |
| 38 | ctanhl(long double complex z) | |
| 39 | { | |
| 40 | long double complex w; | |
| 41 | long double x, y, d; | |
| 42 | ||
| 43 | x = creall(z); | |
| 44 | y = cimagl(z); | |
| 45 | d = coshl(2.0L * x) + cosl(2.0L * y); | |
| 46 | w = sinhl(2.0L * x) / d + (sinl(2.0L * y) / d) * I; | |
| 47 | ||
| 48 | return w; | |
| 49 | } | |
| 1ed15161 | 50 | #endif |