285         let mut head = ntty_buf_mask(self.read_head);  in receive_buf_real_raw()  localVariable
286         let mut n = count.min(NTTY_BUFSIZE - head);  in receive_buf_real_raw()
289         self.read_buf[head..(head + n)].copy_from_slice(&buf[0..n]);  in receive_buf_real_raw()
295         head = ntty_buf_mask(self.read_head);  in receive_buf_real_raw()
296         n = count.min(NTTY_BUFSIZE - head);  in receive_buf_real_raw()
297         self.read_buf[head..(head + n)].copy_from_slice(&buf[offset..(offset + n)]);  in receive_buf_real_raw()
613         let mut head;  in eraser()  localVariable
616             head = self.read_head;  in eraser()
620                 head -= 1;  in eraser()
621                 c = self.read_buf[ntty_buf_mask(head)];  in eraser()
624                     && ntty_buf_mask(head) != ntty_buf_mask(self.canon_head))  in eraser()
638             cnt = self.read_head - head;  in eraser()
639             self.read_head = head;  in eraser()
650                         head += 1;  in eraser()
651                         self.echo_char_raw(self.read_buf[ntty_buf_mask(head)]);  in eraser()
872         let head = self.echo_head;  in commit_echoes()  localVariable
873         self.echo_mark = head;  in commit_echoes()
877         let nr = head - self.echo_tail;  in commit_echoes()
883         self.echo_commit = head;  in commit_echoes()
1127         let head = self.commit_head;  in copy_from_read_buf()  localVariable
1131         let mut n = (NTTY_BUFSIZE - tail).min(head - self.read_tail);  in copy_from_read_buf()
1147                 && head == self.read_tail  in copy_from_read_buf()
1155             return Ok(head != self.read_tail);  in copy_from_read_buf()
1864                         let head = ldata.canon_head;  in ioctl()  localVariable
1866                         let mut nr = head - tail;  in ioctl()
1868                         while ntty_buf_mask(head) != ntty_buf_mask(tail) {  in ioctl()