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Annotation of kernel/machdep/ppc/libc/memmove.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
                      3:  *
                      4:  * @APPLE_LICENSE_HEADER_START@
                      5:  * 
                      6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
                      7:  * Reserved.  This file contains Original Code and/or Modifications of
                      8:  * Original Code as defined in and that are subject to the Apple Public
                      9:  * Source License Version 1.1 (the "License").  You may not use this file
                     10:  * except in compliance with the License.  Please obtain a copy of the
                     11:  * License at http://www.apple.com/publicsource and read it before using
                     12:  * this file.
                     13:  * 
                     14:  * The Original Code and all software distributed under the License are
                     15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
                     16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
                     17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
                     18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
                     19:  * License for the specific language governing rights and limitations
                     20:  * under the License.
                     21:  * 
                     22:  * @APPLE_LICENSE_HEADER_END@
                     23:  */
                     24: 
                     25: /*
                     26:  * Copyright (c) 1991,1993,1998 Apple Computer, Inc. All rights reserved.
                     27:  * 
                     28:  *     File:   machdep/ppc/libc/memmove.c
                     29:  *     History:
                     30:  *
                     31:  */
                     32: 
                     33: #include <ppc/bcopy.h>
                     34: 
                     35: #if    ORG_BCOPY
                     36: #if USE_FAST_BCOPY
                     37: extern void fast_bcopy(const char *src, char *dst, unsigned int ulen);
                     38: #endif
                     39: #endif /* ORG_BCOPY */
                     40: 
                     41: #if    ORG_BCOPY
                     42: void bcopy(const char *src, char *dst, unsigned int ulen)
                     43: #else  /* ORG_BCOPY */
                     44: void tjm_bcopy(const char *src, char *dst, unsigned int ulen)
                     45: #endif /* ORG_BCOPY */
                     46: {
                     47:        if (ulen < 0)
                     48:                return;
                     49:                
                     50:        if (src > dst || dst > src + ulen) {
                     51: #if USE_FAST_BCOPY
                     52:                fast_bcopy(src, dst, ulen);
                     53: #else
                     54:                while (ulen-- > 0) 
                     55:                        *dst++ = *src++;
                     56: #endif /* USE_FAST_BCOPY */
                     57:        }
                     58:        else {
                     59:                dst += (ulen - 1);
                     60:                src += (ulen - 1);
                     61:                while (ulen-- > 0)
                     62:                        *dst-- = *src--;
                     63:        }
                     64:        return;
                     65: }
                     66: 
                     67: void ovbcopy(const char *src, char *dst, unsigned int ulen)
                     68: {
                     69:        bcopy(src, dst, ulen);
                     70: }
                     71: 
                     72: #if USE_FAST_BCOPY
                     73: #else
                     74: void *memcpy(void *dst, const void *src, unsigned int ulen)
                     75: {
                     76:        bcopy(src, dst, ulen);
                     77:        return dst;
                     78: }
                     79: #endif
                     80: 
                     81: void *memmove(void *dst, const void *src, unsigned int ulen)
                     82: {
                     83:        bcopy(src, dst, ulen);
                     84:        return dst;
                     85: }
                     86: 
                     87: 

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