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 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1988 AT&T */ 28 /* All Rights Reserved */ 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #if !defined(_KMDB) && !defined(_KERNEL) 33 34 #pragma weak _memmove = memmove 35 36 #include "lint.h" 37 #endif /* !_KMDB && !_KERNEL */ 38 39 #include <sys/types.h> 40 41 #if defined(_KERNEL) 42 #include <sys/systm.h> 43 #else 44 #include <string.h> 45 #include <memory.h> 46 #endif 47 48 /* 49 * Copy s0 to s, always copy n bytes. 50 * Return s 51 * Copying between objects that overlap will take place correctly 52 */ 53 void * 54 memmove(void *s, const void *s0, size_t n) 55 { 56 if (n != 0) { 57 char *s1 = s; 58 const char *s2 = s0; 59 60 if (s1 <= s2) { 61 do { 62 *s1++ = *s2++; 63 } while (--n != 0); 64 } else { 65 s2 += n; 66 s1 += n; 67 do { 68 *--s1 = *--s2; 69 } while (--n != 0); 70 } 71 } 72 return (s); 73 } 74