48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
|
/*
|
||
|
|
* memmove function
|
||
|
|
*
|
||
|
|
* Copyright 1996 Alexandre Julliard
|
||
|
|
*
|
||
|
|
* This library is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU Lesser General Public
|
||
|
|
* License as published by the Free Software Foundation; either
|
||
|
|
* version 2.1 of the License, or (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This library is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
* Lesser General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU Lesser General Public
|
||
|
|
* License along with this library; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "config.h"
|
||
|
|
#include "wine/port.h"
|
||
|
|
|
||
|
|
#ifndef HAVE_MEMMOVE
|
||
|
|
void *memmove( void *dest, const void *src, size_t len )
|
||
|
|
{
|
||
|
|
register char *dst = dest;
|
||
|
|
|
||
|
|
/* Use memcpy if not overlapping */
|
||
|
|
if ((dst + len <= (char *)src) || ((char *)src + len <= dst))
|
||
|
|
{
|
||
|
|
memcpy( dst, src, len );
|
||
|
|
}
|
||
|
|
/* Otherwise do it the hard way (FIXME: could do better than this) */
|
||
|
|
else if (dst < (char *)src)
|
||
|
|
{
|
||
|
|
while (len--) *dst++ = *((char *)src)++;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
dst += len - 1;
|
||
|
|
src = (char *)src + len - 1;
|
||
|
|
while (len--) *dst-- = *((char *)src)--;
|
||
|
|
}
|
||
|
|
return dest;
|
||
|
|
}
|
||
|
|
#endif /* HAVE_MEMMOVE */
|