diff options
Diffstat (limited to 'sysdeps/libm-ieee754/s_ccos.c')
| -rw-r--r-- | sysdeps/libm-ieee754/s_ccos.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/sysdeps/libm-ieee754/s_ccos.c b/sysdeps/libm-ieee754/s_ccos.c new file mode 100644 index 0000000000..8a4b55dd99 --- /dev/null +++ b/sysdeps/libm-ieee754/s_ccos.c @@ -0,0 +1,64 @@ +/* Return cosine of complex double 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. 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__ double +__ccos (__complex__ double x) +{ + __complex__ double res; + + if (!isfinite (__real__ x) || __isnan (__imag__ x)) + { + if (__real__ x == 0.0 || __imag__ x == 0.0) + { + __real__ res = __nan (""); + __imag__ res = 0.0; + } + else if (__isinf (__imag__ x)) + { + __real__ res = HUGE_VAL; + __imag__ res = __nan (""); + } + else + { + __real__ res = __nan (""); + __imag__ res = __nan (""); + } + } + else + { + __complex__ double y; + + __real__ y = -__imag__ x; + __imag__ y = __real__ x; + + res = __ccosh (y); + } + + return res; +} +weak_alias (__ccos, ccos) +#ifdef NO_LONG_DOUBLE +strong_alias (__ccos, __ccosl) +weak_alias (__ccos, ccosl) +#endif |