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 memmove()               Copy characters between buffers

 #include   <string.h>

  void *memmove(dest, source, count);
  void *dest;            Destination buffer
  const void *source;    Source buffer
  size_t count;               Number of characters to copy

    memmove() copies count characters from source to dest. If parts of
    source and dest overlap, the original source characters are properly
    copied before being overwritten.

    Returns:    memmove() returns the value of dest.

      Notes:    memmove() insures that overlapping regions will be
                handled properly, at some loss of speed. For non-
                overlapping regions, memcpy() will provide quicker
                transfer.

   Portability:     ANSI

 -------------------------------- Example ---------------------------------

 /*This program copies source to dest, where dest begins within source*/

           #include <string.h>

           char source[100] = "Memmove() will properly shift this string.";

           main()
           {
              char *return_val;
              size_t count;

              count = strlen(source);

              printf("Source: Address = %u, String = %s\n", source, source);
              return_val = memmove( (source + count / 2), source, count);
              printf("Dest  : Address = %u, String = %s\n",  (source + count
                  / 2), (source + count / 2));
           }