src/ft_memmove.c


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#include "libft.h"

void *
ft_memmove (void *dest, const void *src, size_t n)
{
  unsigned char *dst_bytes;
  const unsigned char *src_bytes;

  if (!dest && !src)
    return (dest);
  dst_bytes = dest;
  src_bytes = src;
  if (dst_bytes > src_bytes)
    {
      dst_bytes += n;
      src_bytes += n;
      while (n--)
        *--dst_bytes = *--src_bytes;
    }
  else
    {
      while (n--)
        *dst_bytes++ = *src_bytes++;
    }
  return (dest);
}