source: trunk/libs/newlib/src/newlib/libm/complex/casinh.c @ 444

Last change on this file since 444 was 444, checked in by satin@…, 6 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc

File size: 3.2 KB
Line 
1/* $NetBSD: casinh.c,v 1.1 2007/08/20 16:01:31 drochner 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 * imported and modified include for newlib 2010/10/03
32 * Marco Atzeri <marco_atzeri@yahoo.it>
33 */
34
35/*
36FUNCTION
37        <<casinh>>, <<casinhf>>---complex arc hyperbolic sine
38
39INDEX
40        casinh
41INDEX
42        casinhf
43
44SYNOPSIS
45       #include <complex.h>
46       double complex casinh(double complex <[z]>);
47       float complex casinhf(float complex <[z]>);
48
49
50DESCRIPTION
51        @ifnottex
52        These functions compute the complex arc hyperbolic sine of <[z]>,
53        with branch cuts outside the interval [-i, +i] along the
54        imaginary axis.       
55        @end ifnottex
56        @tex
57        These functions compute the complex arc hyperbolic sine of <[z]>,
58        with branch cuts outside the interval [$-i$, $+i$] along the
59        imaginary axis.       
60        @end tex
61
62        <<casinhf>> is identical to <<casinh>>, except that it performs
63        its calculations on <<floats complex>>.
64
65RETURNS
66        @ifnottex
67        These functions return the complex arc hyperbolic sine value,
68        in the range of a strip mathematically unbounded along the
69        real axis and in the interval [-i*p/2, +i*p/2] along the
70        imaginary axis.
71        @end ifnottex
72        @tex
73        These functions return the complex arc hyperbolic sine value,
74        in the range of a strip mathematically unbounded along the
75        real axis and in the interval [$-i\pi/2$, $+i\pi/2$] along the
76        imaginary axis.
77        @end tex
78
79PORTABILITY
80        <<casinh>> and <<casinhf>> are ISO C99
81
82QUICKREF
83        <<casinh>> and <<casinhf>> are ISO C99
84
85*/
86
87
88#include <complex.h>
89
90double complex
91casinh(double complex z)
92{
93        double complex w;
94
95        w = -1.0 * I * casin(z * I);
96        return w;
97}
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