diff options
author | Ulrich Drepper <drepper@redhat.com> | 2005-12-14 15:06:39 +0000 |
---|---|---|
committer | Ulrich Drepper <drepper@redhat.com> | 2005-12-14 15:06:39 +0000 |
commit | 9d13fb2413921c713f83efe331e8e4d219c62c6b (patch) | |
tree | 2d44d7ac45ab2d147eb8361bbff880c365aa8ad5 /sysdeps/generic/s_ctan.c | |
parent | b6ab06cef4670e02756bcdd4d2c33a49369a4346 (diff) | |
download | glibc-9d13fb2413921c713f83efe331e8e4d219c62c6b.tar.gz glibc-9d13fb2413921c713f83efe331e8e4d219c62c6b.tar.xz glibc-9d13fb2413921c713f83efe331e8e4d219c62c6b.zip |
Moved to csu/errno-loc.c.
Diffstat (limited to 'sysdeps/generic/s_ctan.c')
-rw-r--r-- | sysdeps/generic/s_ctan.c | 84 |
1 files changed, 0 insertions, 84 deletions
diff --git a/sysdeps/generic/s_ctan.c b/sysdeps/generic/s_ctan.c deleted file mode 100644 index 0464ab86d5..0000000000 --- a/sysdeps/generic/s_ctan.c +++ /dev/null @@ -1,84 +0,0 @@ -/* Complex tangent function for double. - Copyright (C) 1997, 2005 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 <fenv.h> -#include <math.h> - -#include "math_private.h" - - -__complex__ double -__ctan (__complex__ double x) -{ - __complex__ double res; - - if (!isfinite (__real__ x) || !isfinite (__imag__ x)) - { - if (__isinf (__imag__ x)) - { - __real__ res = __copysign (0.0, __real__ x); - __imag__ res = __copysign (1.0, __imag__ x); - } - else if (__real__ x == 0.0) - { - res = x; - } - else - { - __real__ res = __nan (""); - __imag__ res = __nan (""); - -#ifdef FE_INVALID - if (__isinf (__real__ x)) - feraiseexcept (FE_INVALID); -#endif - } - } - else - { - double sin2rx, cos2rx; - double den; - - __sincos (2.0 * __real__ x, &sin2rx, &cos2rx); - - den = cos2rx + __ieee754_cosh (2.0 * __imag__ x); - - if (den == 0.0) - { - __complex__ double ez = __cexp (1.0i * x); - __complex__ double emz = __cexp (-1.0i * x); - - res = (ez - emz) / (ez + emz) * -1.0i; - } - else - { - __real__ res = sin2rx / den; - __imag__ res = __ieee754_sinh (2.0 * __imag__ x) / den; - } - } - - return res; -} -weak_alias (__ctan, ctan) -#ifdef NO_LONG_DOUBLE -strong_alias (__ctan, __ctanl) -weak_alias (__ctan, ctanl) -#endif |