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48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
/*
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* memmove function
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*
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* Copyright 1996 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#ifndef HAVE_MEMMOVE
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void *memmove( void *dest, const void *src, size_t len )
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{
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register char *dst = dest;
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/* Use memcpy if not overlapping */
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if ((dst + len <= (char *)src) || ((char *)src + len <= dst))
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{
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memcpy( dst, src, len );
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}
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/* Otherwise do it the hard way (FIXME: could do better than this) */
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else if (dst < (char *)src)
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{
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while (len--) *dst++ = *((char *)src)++;
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}
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else
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{
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dst += len - 1;
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src = (char *)src + len - 1;
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while (len--) *dst-- = *((char *)src)--;
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}
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return dest;
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}
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#endif /* HAVE_MEMMOVE */
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