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[/] [openrisc/] [tags/] [gnu-src/] [newlib-1.18.0/] [newlib-1.18.0-or32-1.0rc2/] [newlib/] [libc/] [sys/] [linux/] [cmath/] [s_ccos.c] - Rev 520
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/* 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 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 __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; #ifdef FE_INVALID if (__isinf (__real__ x)) feraiseexcept (FE_INVALID); #endif } else if (__isinf (__imag__ x)) { __real__ res = HUGE_VAL; __imag__ res = __nan (""); #ifdef FE_INVALID if (__isinf (__real__ x)) feraiseexcept (FE_INVALID); #endif } else { __real__ res = __nan (""); __imag__ res = __nan (""); #ifdef FE_INVALID if (isfinite (__imag__ x)) feraiseexcept (FE_INVALID); #endif } } 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