memmove.c

打魔兽战网的都知道他是什么

/*
 * Copyright (C) 2000,2002  Ross Combs ([e-mail])
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
#include "common/setup_before.h"
#ifndef HAVE_MEMMOVE

#ifdef HAVE_STDDEF_H
# include <stddef.h>
#else
# ifndef NULL
#  define NULL ((void *)0)
# endif
#endif
#include "memmove.h"
#include "common/setup_after.h"

extern void * memmove(void * dest, void const * src, unsigned long n)
{
/* very slow, but we don't care */
/* FIXME: does this handle all overlapping cases correctly? */
    unsigned char * td=dest;
    const unsigned char * ts=src;
    unsigned long   i;
    
    if (!td || !ts)
	return NULL;
    
    for (i=0; i<n; i++)
	td[i] = ts[i];
    return dest;
}

#else
typedef int filenotempty; /* make ISO standard happy */
#endif