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Annotation of driverkit/libDriver/ppc/memcpy.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: /* Copyright (c) 1992 by NeXT Computer, Inc.
                     25:  *
                     26:  *      File:   memcpy.c 
                     27:  *
                     28:  * HISTORY
                     29:  * 16-Aug-93  John Immordino at NeXT
                     30:  *      Created.
                     31:  */
                     32: 
                     33: #import <driverkit/driverTypes.h>
                     34: 
                     35: void _IOCopyMemory(char *src, char *dst, unsigned copyLen, 
                     36:        unsigned copyUnitSize)
                     37: {
                     38:     
                     39:     unsigned i;
                     40:     
                     41:     if (src == NULL || dst == NULL || src == dst || copyLen == 0)
                     42:        return;
                     43: 
                     44:     /* 
                     45:      * Just copy bytes.  Punt for now, optimize this later if we 
                     46:      * ever use driverkit with m68k.  Assembly routines for byte-wide
                     47:      * and int-wide copy are in mk/machdep/m68k/libc.s
                     48:      */
                     49:     for (i = 0 ; i < copyLen ; ++i)
                     50:        dst[i] = src[i];
                     51: }

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