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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* Copyright (c) 1988 AT&T */ 30 /* All Rights Reserved */ 31 32 33 /* 34 * Swab bytes 35 */ 36 37 #pragma weak swab = _swab 38 39 #include "synonyms.h" 40 #include <sys/types.h> 41 #include <stdlib.h> 42 43 44 #define STEP (void)((temp = *from++), (*to++ = *from++), (*to++ = temp)) 45 46 void 47 swab(const char *src, char *dest, ssize_t n) 48 { 49 char temp; 50 const char *from = (const char *)src; 51 char *to = (char *)dest; 52 53 if (n <= 1) 54 return; 55 n >>= 1; n++; 56 /* round to multiple of 8 */ 57 while ((--n) & 07) 58 STEP; 59 n >>= 3; 60 while (--n >= 0) { 61 STEP; STEP; STEP; STEP; 62 STEP; STEP; STEP; STEP; 63 } 64 } 65