1 // Copyright 2021 Ian Jackson and contributors to Hippotat
2 // SPDX-License-Identifier: GPL-3.0-or-later
3 // There is NO WARRANTY.
7 // xxx are we using this at all ?
8 #[derive(Default,Clone)]
9 pub struct PacketQueue<D> {
14 impl<D> PacketQueue<D> where D: AsRef<[u8]> {
15 pub fn push_back(&mut self, data: D) {
16 self.content += data.as_ref().len();
17 self.queue.push_back(data);
20 pub fn pop_front(&mut self) -> Option<D> {
21 let data = self.queue.pop_front()?;
22 self.content -= data.as_ref().len();
26 pub fn is_empty(&self) -> bool { self.queue.is_empty() }
27 pub fn peek_front(&self) -> Option<&D> { self.queue.front() }
30 #[derive(Default,Clone)]
31 pub struct QueueBuf<E> {
33 eaten1: usize, // 0 <= eaten1 < queue.front()...len()
37 #[derive(Default,Debug,Clone)]
38 pub struct FrameQueueBuf {
39 queue: QueueBuf<Cervine<'static, Box<[u8]>, [u8]>>,
42 impl<E> Debug for QueueBuf<E> where E: AsRef<[u8]> {
44 fn fmt(&self, f: &mut fmt::Formatter) {
45 write!(f, "Queue{{content={},eaten1={},queue=[",
46 self.content, self.eaten1)?;
47 for q in &self.queue { write!(f, "{},", q.as_ref().len())?; }
52 impl<E> QueueBuf<E> where E: AsRef<[u8]> {
53 pub fn push<B: Into<E>>(&mut self, b: B) {
56 pub fn push_(&mut self, b: E) {
57 let l = b.as_ref().len();
58 self.queue.push_back(b);
61 pub fn is_empty(&self) -> bool { self.content == 0 }
65 pub fn push<B: Into<Box<[u8]>>>(&mut self, b: B) {
68 pub fn push_(&mut self, b: Box<[u8]>) {
69 self.queue.push_(Cervine::Owned(b));
70 self.queue.push_(Cervine::Borrowed(&SLIP_END_SLICE));
72 pub fn is_empty(&self) -> bool { self.queue.is_empty() }
75 impl<E> Extend<E> for FrameQueueBuf where E: Into<Box<[u8]>> {
76 fn extend<I>(&mut self, it: I)
77 where I: IntoIterator<Item=E>
79 for b in it { self.push(b) }
83 impl<E> hyper::body::Buf for QueueBuf<E> where E: AsRef<[u8]> {
84 fn remaining(&self) -> usize { self.content }
85 fn chunk(&self) -> &[u8] {
86 let front = if let Some(f) = self.queue.front() { f } else { return &[] };
87 &front.as_ref()[ self.eaten1.. ]
89 fn advance(&mut self, cnt: usize) {
93 if self.eaten1 == 0 { break }
94 let front = self.queue.front().unwrap();
95 if self.eaten1 < front.as_ref().len() { break; }
96 self.eaten1 -= front.as_ref().len();
97 self.queue.pop_front().unwrap();
102 impl hyper::body::Buf for FrameQueueBuf {
103 fn remaining(&self) -> usize { self.queue.remaining() }
104 fn chunk(&self) -> &[u8] { self.queue.chunk() }
105 fn advance(&mut self, cnt: usize) { self.queue.advance(cnt) }