69         let mut n;  in grow()  localVariable
72             n = self.tail - self.head;  in grow()
73             newdata[..n].copy_from_slice(&self.data[self.head..self.tail]);  in grow()
76             n = self.data.len() - self.head;  in grow()
77             newdata[..n].copy_from_slice(&self.data[self.head..]);  in grow()
78             newdata[n..n + self.tail].copy_from_slice(&self.data[..self.tail]);  in grow()
79             n += self.tail;  in grow()
82         self.tail = n;  in grow()
165         let n = end - b.tail;  in write()  localVariable
167         b.data[tail..end].copy_from_slice(&packet[..n]);  in write()
168         b.tail += n;  in write()
171             let m = packet.len() - n;  in write()
172             b.data[..m].copy_from_slice(&packet[n..]);  in write()