/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2011 Nexenta Systems, Inc. All rights reserved. */ /* * Copyright 2005 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #pragma weak __carg = carg #include <math.h> /* atan2 */ #include "complex_wrapper.h" static const double pi = 3.14159265358979311600e+00, pi_lo = 1.22464679914735320717e-16; double carg(dcomplex z) { int ix, iy; ix = ((int *)&(D_RE(z)))[HIWORD]; iy = ((int *)&(D_IM(z)))[HIWORD]; if ((((ix | iy) & ~0x80000000) | ((int *)&(D_RE(z)))[LOWORD] | ((int *)&(D_IM(z)))[LOWORD]) == 0) { /* x and y are both zero */ if (ix == 0) return (D_IM(z)); return ((iy == 0)? pi + pi_lo : -pi - pi_lo); } return (atan2(D_IM(z), D_RE(z))); }