1 /*	$OpenBSD: s_cproj.c,v 1.7 2013/07/03 04:46:36 espie 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 <float.h>
20 #include <math.h>
21 
22 double complex
23 cproj(double complex z)
24 {
25 	double complex res;
26 
27 	if (isinf(__real__ z) || isinf(__imag__ z)) {
28 		__real__ res = INFINITY;
29 		__imag__ res = copysign(0.0, __imag__ z);
30 	} else {
31 		res = z;
32 	}
33 
34 	return res;
35 }
36 
37 #if	LDBL_MANT_DIG == DBL_MANT_DIG
38 __strong_alias(cprojl, cproj);
39 #endif	/* LDBL_MANT_DIG == DBL_MANT_DIG */
40