+ ///
+ /// Write a listing of the stored recordings to @p tx_buf.
+ pub fn list_recordings(&mut self, tx_buf: &mut Buffer) {
+ for index in self.sector_header_iter().rev() {
+ let sector_header = &self.sector_header[index as usize];
+
+ if !sector_header.starts_recording() {
+ continue;
+ }
+
+ let mut num_data_sectors = 0;
+
+ for d in 1..NUM_SECTORS {
+ let wrapped_index = ((index + d) & (NUM_SECTORS - 1)) as usize;
+ let other_sector_header = &self.sector_header[wrapped_index];
+
+ if other_sector_header.belongs_to(sector_header.recording_id) {
+ num_data_sectors += 1;
+ }
+ }
+
+ let mut date_time_s = [b' '; 19];
+
+ if let Some(tm) = Time::from_unix_time(sector_header.start_time) {
+ tm.fmt_date(&mut date_time_s[0..]);
+ tm.fmt_time(&mut date_time_s[11..]);
+ }
+
+ let recording_size = (num_data_sectors + 1) * (SECTOR_SIZE >> 10);
+
+ let mut recording_size_s = [b'0'; 9];
+ let recording_size_s_len = fmt_u32_pad(&mut recording_size_s,
+ recording_size as u32,
+ 8, b' ');
+
+ let mut recording_id_s = [b'0'; 9];
+ let recording_id_s_len =
+ fmt_u32_pad(&mut recording_id_s,
+ sector_header.recording_id as u32,
+ 8, b' ');
+
+ tx_buf.write(&date_time_s);
+ tx_buf.write(&recording_size_s[0..recording_size_s_len]);
+ tx_buf.write(b"K");
+ tx_buf.write(&recording_id_s[0..recording_id_s_len]);
+ tx_buf.write(b"\n");
+
+ tx_buf.flush();
+ }
+ }
+
+ ///
+ /// Check whether or not recording @p recording_id exists.
+ pub fn has_recording(&mut self, recording_id: u16) -> bool {
+ if recording_id == 0 {
+ return false;
+ }
+
+ self.sector_header_iter().find(|&index| {
+ let sector_header = &self.sector_header[index as usize];
+
+ sector_header.recording_id == recording_id &&
+ sector_header.starts_recording()
+ }).is_some()
+ }
+