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 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 27 * Use is subject to license terms. 28 */ 29 30 #pragma weak catanh = __catanh 31 32 /* INDENT OFF */ 33 /* 34 * z := x + iy 35 * catanh(z) = -i catan(iz) 36 * = -i catan(-y+ix) 37 * = (Im(catan(-y+ix)), -Re(catan(-y+ix))) 38 */ 39 /* INDENT ON */ 40 41 #include "libm.h" 42 #include "complex_wrapper.h" 43 44 dcomplex 45 catanh(dcomplex z) { 46 double x, y; 47 dcomplex ans, ct; 48 49 x = D_RE(z); 50 y = D_IM(z); 51 D_RE(z) = -y; 52 D_IM(z) = x; 53 ct = catan(z); 54 D_RE(ans) = D_IM(ct); 55 D_IM(ans) = -D_RE(ct); 56 return (ans); 57 } 58