1 /* Return cosine of complex long double value.
2 Copyright (C) 1997 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
26 __complex__
long double
27 __ccosl (__complex__
long double x
)
29 __complex__
long double res
;
31 if (!isfinite (__real__ x
) || __isnanl (__imag__ x
))
33 if (__real__ x
== 0.0 || __imag__ x
== 0.0)
35 __real__ res
= __nanl ("");
39 if (__isinfl (__real__ x
))
40 feraiseexcept (FE_INVALID
);
43 else if (__isinfl (__imag__ x
))
45 __real__ res
= HUGE_VALL
;
46 __imag__ res
= __nanl ("");
49 if (__isinfl (__real__ x
))
50 feraiseexcept (FE_INVALID
);
55 __real__ res
= __nanl ("");
56 __imag__ res
= __nanl ("");
59 if (isfinite (__imag__ x
))
60 feraiseexcept (FE_INVALID
);
66 __complex__
long double y
;
68 __real__ y
= -__imag__ x
;
69 __imag__ y
= __real__ x
;
76 weak_alias (__ccosl
, ccosl
)