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/* $OpenBSD: s_cacosh.c,v 1.2 2011/07/08 19:25:31 martynas Exp $ */
/*
* Copyright (c) 2008 Stephen L. Moshier <steve@moshier.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* LINTLIBRARY */
/* cacosh
*
* Complex inverse hyperbolic cosine
*
*
*
* SYNOPSIS:
*
* double complex cacosh();
* double complex z, w;
*
* w = cacosh (z);
*
*
*
* DESCRIPTION:
*
* acosh z = i acos z .
*
* ACCURACY:
*
* Relative error:
* arithmetic domain # trials peak rms
* IEEE -10,+10 30000 1.6e-14 2.1e-15
*
*/
#include <sys/cdefs.h>
#include <complex.h>
#include <float.h>
#include <math.h>
double complex
cacosh(double complex z)
{
double complex w;
w = I * cacos (z);
return (w);
}
#if LDBL_MANT_DIG == 53
#ifdef lint
/* PROTOLIB1 */
long double complex cacoshl(long double complex);
#else /* lint */
__weak_alias(cacoshl, cacosh);
#endif /* lint */
#endif /* LDBL_MANT_DIG == 53 */
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