mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-11 19:49:32 +00:00
59 lines
2.1 KiB
C
59 lines
2.1 KiB
C
|
/* $NetBSD: ctanf.c,v 1.1 2007/08/20 16:01:38 drochner Exp $ */
|
||
|
|
|
||
|
|
/*-
|
||
|
|
* Copyright (c) 2007 The NetBSD Foundation, Inc.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* This code is derived from software written by Stephen L. Moshier.
|
||
|
|
* It is redistributed by the NetBSD Foundation by permission of the author.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
||
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
||
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
||
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
*
|
||
|
|
* imported and modified include for newlib 2010/10/03
|
||
|
|
* Marco Atzeri <marco_atzeri@yahoo.it>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <complex.h>
|
||
|
|
#include <math.h>
|
||
|
|
#include "cephes_subrf.h"
|
||
|
|
|
||
|
|
float complex
|
||
|
|
ctanf(float complex z)
|
||
|
|
{
|
||
|
|
float complex w;
|
||
|
|
float d;
|
||
|
|
|
||
|
|
d = cosf(2.0f * crealf(z)) + coshf(2.0f * cimagf(z));
|
||
|
|
|
||
|
|
if (fabsf(d) < 0.25f)
|
||
|
|
d = _ctansf(z);
|
||
|
|
|
||
|
|
if (d == 0.0f) {
|
||
|
|
/* mtherr ("ctan", OVERFLOW); */
|
||
|
|
w = HUGE_VALF + HUGE_VALF * I;
|
||
|
|
return w;
|
||
|
|
}
|
||
|
|
|
||
|
|
w = sinf(2.0f * crealf(z)) / d + (sinhf(2.0f * cimagf(z)) / d) * I;
|
||
|
|
return w;
|
||
|
|
}
|