| /* 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; |

| } |

| #ifndef __casinf |

| weak_alias (__casinf, casinf) |

| #endif |