Function cut_characters_mode

src/cut.c:864–921

   multibyte characters.  */

static void
cut_characters_mode (FILE *stream, bool byte_mode)
{
  uintmax_t idx = 0;
  bool print_delimiter = false;
  static char bytes_in[IO_BUFSIZE];
  mbbuf_t mbbuf;

  current_rp = frp;
  mbbuf_init (&mbbuf, bytes_in, sizeof bytes_in, stream);

  while (true)
    {
      mcel_t g = mbbuf_get_char (&mbbuf);

      if (g.ch == line_delim)
        reset_item_line (&idx, &print_delimiter);
      else if (g.ch == MBBUF_EOF)
        {
          write_pending_line_delim (idx);
          break;
        }
      else if (byte_mode)
        {
          bool first_selected_is_range_start = false;
          bool seen_selected = false;
          bool suffix_selected = true;

          for (idx_t i = 0; i < g.len; i++)
            {
              next_item (&idx);
              if (print_kth (idx))
                {
                  if (!seen_selected)
                    {
                      seen_selected = true;
                      first_selected_is_range_start
                        = is_range_start_index (idx);
                    }
                }
              else if (seen_selected)
                suffix_selected = false;
            }

          if (seen_selected && suffix_selected)
            write_selected_item (&print_delimiter,first_selected_is_range_start,
                                 mbbuf_char_offset (&mbbuf, g), g.len);
        }
      else
        {
          next_item (&idx);
          if (print_kth (idx))
            write_selected_item (&print_delimiter,
                                 is_range_start_index (idx),
                                 mbbuf_char_offset (&mbbuf, g), g.len);
        }
    }
}