int char_match(const char       **pattern,
           const char       *string)
{
  int   bang = 0;
  int   ret = bang;

  if (**pattern != '[')
    return (**pattern == *string);
  if ((*(*pattern + 1) == '!') && ++(*pattern))
    ret = bang = 1;
  while (++(*pattern) && **pattern != ']')
    if ((*(*pattern + 1) == '-' && *(*pattern + 2) != ']'
     && (*string >= *(((*pattern)++)++) && *string <= **pattern))
        || (**pattern == *string))
      ret = !bang;
  return (ret);
}