1 // Copyright 2021 Ian Jackson and contributors to Hippotat
2 // SPDX-License-Identifier: GPL-3.0-or-later
3 // There is NO WARRANTY.
7 #[derive(Default,Clone)]
10 eaten1: usize, // 0 <= eaten1 < queue.front()...len()
14 #[derive(Default,Debug,Clone)]
15 pub struct FrameQueue {
16 queue: Queue<Cervine<'static, Box<[u8]>, [u8]>>,
19 impl<E> Debug for Queue<E> where E: AsRef<[u8]> {
21 fn fmt(&self, f: &mut fmt::Formatter) {
22 write!(f, "Queue{{content={},eaten1={},queue=[",
23 self.content, self.eaten1)?;
24 for q in &self.queue { write!(f, "{},", q.as_ref().len())?; }
29 impl<E> Queue<E> where E: AsRef<[u8]> {
30 pub fn push<B: Into<E>>(&mut self, b: B) {
33 pub fn push_(&mut self, b: E) {
34 let l = b.as_ref().len();
35 self.queue.push_back(b);
38 pub fn is_empty(&self) -> bool { self.content == 0 }
42 pub fn push<B: Into<Box<[u8]>>>(&mut self, b: B) {
45 pub fn push_(&mut self, b: Box<[u8]>) {
46 self.queue.push_(Cervine::Owned(b));
47 self.queue.push_(Cervine::Borrowed(&SLIP_END_SLICE));
49 pub fn is_empty(&self) -> bool { self.queue.is_empty() }
52 impl<E> Extend<E> for FrameQueue where E: Into<Box<[u8]>> {
53 fn extend<I>(&mut self, it: I)
54 where I: IntoIterator<Item=E>
56 for b in it { self.push(b) }
60 impl<E> hyper::body::Buf for Queue<E> where E: AsRef<[u8]> {
61 fn remaining(&self) -> usize { self.content }
62 fn chunk(&self) -> &[u8] {
63 let front = if let Some(f) = self.queue.front() { f } else { return &[] };
64 &front.as_ref()[ self.eaten1.. ]
66 fn advance(&mut self, cnt: usize) {
70 if self.eaten1 == 0 { break }
71 let front = self.queue.front().unwrap();
72 if self.eaten1 < front.as_ref().len() { break; }
73 self.eaten1 -= front.as_ref().len();
74 self.queue.pop_front().unwrap();
79 impl hyper::body::Buf for FrameQueue {
80 fn remaining(&self) -> usize { self.queue.remaining() }
81 fn chunk(&self) -> &[u8] { self.queue.chunk() }
82 fn advance(&mut self, cnt: usize) { self.queue.advance(cnt) }