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