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/* Public domain.  */

#include <stddef.h>

void *

memmove (void *dest, const void *src, size_t len)

{

  char *d = dest;

  const char *s = src;

  if (d < s)

    while (len--)

      *d++ = *s++;

  else

    {

      char *lasts = s + (len-1);

      char *lastd = d + (len-1);

      while (len--)

        *lastd-- = *lasts--;

    }

  return dest;

}