mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-06 05:10:05 +00:00
41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
/* Return arc sine of complex float value.
|
|
Copyright (C) 1997 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <complex.h>
|
|
#include <math.h>
|
|
|
|
|
|
__complex__ float
|
|
__casinf (__complex__ float x)
|
|
{
|
|
__complex__ float res;
|
|
|
|
if (isnan (__real__ x) || isnan (__imag__ x))
|
|
{
|
|
if (__real__ x == 0.0)
|
|
{
|
|
res = x;
|
|
}
|
|
else if (__isinff (__real__ x) || __isinff (__imag__ x))
|
|
{
|
|
__real__ res = __nanf ("");
|
|
__imag__ res = __copysignf (HUGE_VALF, __imag__ x);
|
|
}
|
|
else
|
|
{
|
|
__real__ res = __nanf ("");
|
|
__imag__ res = __nanf ("");
|
|
}
|
|
}
|
|
else
|
|
{
|
|
__complex__ float y;
|
|
|
|
__real__ y = -__imag__ x;
|
|
__imag__ y = __real__ x;
|
|
|
|
y = __casinhf (y);
|
|
|
|
__real__ res = __imag__ y;
|
|
__imag__ res = -__real__ y;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
weak_alias (__casinf, casinf)
|