gonzui

    1: /*      $OpenBSD: s_cprojf.c,v 1.3 2011/05/31 21:13:44 martynas Exp $        */
    2: /*
    3:  * Copyright (c) 2008 Martynas Venckus <martynas@openbsd.org>
    4:  *
    5:  * Permission to use, copy, modify, and distribute this software for any
    6:  * purpose with or without fee is hereby granted, provided that the above
    7:  * copyright notice and this permission notice appear in all copies.
    8:  *
    9:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   10:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   11:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   12:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   13:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   14:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   15:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   16:  */
   17: 
   18: #include <complex.h>
   19: #include <math.h>
   20: 
   21: float complex
   22: cprojf(float complex z)
   23: {
   24:         float complex res;
   25: 
   26:         if (isinf(__real__ z) || isinf(__imag__ z)) {
   27:                 __real__ res = INFINITY;
   28:                 __imag__ res = copysignf(0.0, __imag__ z);
   29:         } else {
   30:                 res = z;
   31:         }
   32: 
   33:         return res;
   34: }