1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 24 */ 25 26 /* 27 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 28 * Use is subject to license terms. 29 */ 30 31 #pragma weak __catanh = catanh 32 33 34 /* 35 * z := x + iy 36 * catanh(z) = -i catan(iz) 37 * = -i catan(-y+ix) 38 * = (Im(catan(-y+ix)), -Re(catan(-y+ix))) 39 */ 40 41 #include "libm.h" 42 #include "complex_wrapper.h" 43 44 dcomplex 45 catanh(dcomplex z) 46 { 47 double x, y; 48 dcomplex ans, ct; 49 50 x = D_RE(z); 51 y = D_IM(z); 52 D_RE(z) = -y; 53 D_IM(z) = x; 54 ct = catan(z); 55 D_RE(ans) = D_IM(ct); 56 D_IM(ans) = -D_RE(ct); 57 return (ans); 58 }