gonzui

    1: /*      $OpenBSD: s_carg.c,v 1.2 2011/07/08 19:25:31 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: /* LINTLIBRARY */
   19: 
   20: #include <sys/cdefs.h>
   21: #include <complex.h>
   22: #include <float.h>
   23: #include <math.h>
   24: 
   25: double
   26: carg(double complex z)
   27: {
   28:         return atan2 (__imag__ z, __real__ z);
   29: }
   30: 
   31: #if     LDBL_MANT_DIG == 53
   32: #ifdef  lint
   33: /* PROTOLIB1 */
   34: long double cargl(long double complex);
   35: #else   /* lint */
   36: __weak_alias(cargl, carg);
   37: #endif  /* lint */
   38: #endif  /* LDBL_MANT_DIG == 53 */