1174561Sdas/*- 2174561Sdas * Copyright (c) 2005 David Schultz <das@FreeBSD.ORG> 3174561Sdas * All rights reserved. 4174561Sdas * 5174561Sdas * Redistribution and use in source and binary forms, with or without 6174561Sdas * modification, are permitted provided that the following conditions 7174561Sdas * are met: 8174561Sdas * 1. Redistributions of source code must retain the above copyright 9174561Sdas * notice, this list of conditions and the following disclaimer. 10174561Sdas * 2. Redistributions in binary form must reproduce the above copyright 11174561Sdas * notice, this list of conditions and the following disclaimer in the 12174561Sdas * documentation and/or other materials provided with the distribution. 13174561Sdas * 14174561Sdas * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15174561Sdas * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16174561Sdas * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17174561Sdas * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18174561Sdas * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19174561Sdas * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20174561Sdas * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21174561Sdas * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22174561Sdas * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23174561Sdas * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24174561Sdas * SUCH DAMAGE. 25174561Sdas */ 26174561Sdas 27174561Sdas#include <sys/cdefs.h> 28174561Sdas__FBSDID("$FreeBSD$"); 29174561Sdas 30174561Sdas#include <complex.h> 31174561Sdas#include <math.h> 32174561Sdas 33174561Sdasdouble 34174561Sdascarg(double complex z) 35174561Sdas{ 36174561Sdas 37174561Sdas return (atan2(cimag(z), creal(z))); 38174561Sdas} 39