mirror of
https://github.com/termux/termux-packages.git
synced 2024-11-21 20:56:19 +00:00
272f30ead3
due to not being properly packaged. See https://github.com/termux/termux-packages/issues/8702 for details.
83 lines
1.9 KiB
C
83 lines
1.9 KiB
C
/*-
|
|
* 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.
|
|
*/
|
|
|
|
/* cpow
|
|
*
|
|
* Complex power function
|
|
*
|
|
*
|
|
*
|
|
* SYNOPSIS:
|
|
*
|
|
* double complex cpow();
|
|
* double complex a, z, w;
|
|
*
|
|
* w = cpow (a, z);
|
|
*
|
|
*
|
|
*
|
|
* DESCRIPTION:
|
|
*
|
|
* Raises complex A to the complex Zth power.
|
|
* Definition is per AMS55 # 4.2.8,
|
|
* analytically equivalent to cpow(a,z) = cexp(z clog(a)).
|
|
*
|
|
* ACCURACY:
|
|
*
|
|
* Relative error:
|
|
* arithmetic domain # trials peak rms
|
|
* IEEE -10,+10 30000 9.4e-15 1.5e-15
|
|
*
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <complex.h>
|
|
#include <float.h>
|
|
#include <math.h>
|
|
|
|
#if defined __ANDROID__ && __ANDROID_API__ < 26
|
|
|
|
#pragma GCC visibility push(hidden)
|
|
|
|
double complex
|
|
cpow(double complex a, double complex z)
|
|
{
|
|
double complex w;
|
|
double x, y, r, theta, absa, arga;
|
|
|
|
x = creal (z);
|
|
y = cimag (z);
|
|
absa = cabs (a);
|
|
if (absa == 0.0) {
|
|
return (CMPLX(0.0, 0.0));
|
|
}
|
|
arga = carg (a);
|
|
r = pow (absa, x);
|
|
theta = x * arga;
|
|
if (y != 0.0) {
|
|
r = r * exp (-y * arga);
|
|
theta = theta + y * log (absa);
|
|
}
|
|
w = CMPLX(r * cos (theta), r * sin (theta));
|
|
return (w);
|
|
}
|
|
|
|
#pragma GCC visibility pop
|
|
|
|
#endif
|