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Viewing changes to roms/SLOF/lib/libc/string/memmove.c

  • Committer: Phil Dennis-Jordan
  • Date: 2017-07-21 08:03:43 UTC
  • mfrom: (1.1.1)
  • Revision ID: phil@philjordan.eu-20170721080343-2yr2vdj7713czahv
New upstream release 2.9.0.

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roms/SLOF/lib/libc/string/memmove.c
 
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/******************************************************************************
 
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 * Copyright (c) 2004, 2008 IBM Corporation
 
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 * All rights reserved.
 
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 * This program and the accompanying materials
 
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 * are made available under the terms of the BSD License
 
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 * which accompanies this distribution, and is available at
 
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 * http://www.opensource.org/licenses/bsd-license.php
 
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 *
 
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 * Contributors:
 
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 *     IBM Corporation - initial implementation
 
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 *****************************************************************************/
 
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#include "string.h"
 
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void *
 
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memmove(void *dest, const void *src, size_t n)
 
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{
 
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        char *cdest;
 
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        const char *csrc;
 
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        int i;
 
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        /* Do the buffers overlap in a bad way? */
 
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        if (src < dest && src + n >= dest) {
 
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                /* Copy from end to start */
 
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                cdest = dest + n - 1;
 
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                csrc = src + n - 1;
 
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                for (i = 0; i < n; i++) {
 
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                        *cdest-- = *csrc--;
 
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                }
 
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        }
 
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        else {
 
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                /* Normal copy is possible */
 
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                cdest = dest;
 
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                csrc = src;
 
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                for (i = 0; i < n; i++) {
 
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                        *cdest++ = *csrc++;
 
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                }
 
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        }
 
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        return dest;
 
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}