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Annotation of driverkit/libDriver/ppc/memcpy.c, revision 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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