1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133

use super::inner::{FramedInner, ReadFrame};
use crate::{codec::Decoder, error::Error};
pub use bytes::{Bytes, BytesMut};
use futures_core::Stream;
use futures_io::AsyncRead;
use futures_sink::Sink;
use pin_project_lite::pin_project;
use std::{
    fmt,
    pin::Pin,
    task::{Context, Poll},
};

pin_project! {
    pub struct FramedRead<T, D> {
        #[pin]
        inner: FramedInner<T, D, ReadFrame>,
    }
}

impl<T, D> FramedRead<T, D>
where
    T: AsyncRead,
    D: Decoder,
{
    pub fn new(inner: T, decoder: D) -> FramedRead<T, D> {
        FramedRead {
            inner: FramedInner {
                inner,
                codec: decoder,
                state: Default::default(),
            },
        }
    }

    pub fn with_capacity(inner: T, decoder: D, capacity: usize) -> FramedRead<T, D> {
        FramedRead {
            inner: FramedInner {
                inner,
                codec: decoder,
                state: ReadFrame {
                    buffer: BytesMut::with_capacity(capacity),
                    eof: false,
                    has_errored: false,
                    is_readable: false,
                },
            },
        }
    }
}

impl<T, D> FramedRead<T, D> {
    pub fn get_ref(&self) -> &T {
        &self.inner.inner
    }

    pub fn get_mut(&mut self) -> &mut T {
        &mut self.inner.inner
    }

    pub fn get_pin_mut(self: Pin<&mut Self>) -> Pin<&mut T> {
        self.project().inner.project().inner
    }

    pub fn into_inner(self) -> T {
        self.inner.inner
    }

    pub fn decoder(&self) -> &D {
        &self.inner.codec
    }

    pub fn decoder_mut(&mut self) -> &mut D {
        &mut self.inner.codec
    }

    pub fn read_buffer(&self) -> &BytesMut {
        &self.inner.state.buffer
    }

    pub fn read_buffer_mut(&mut self) -> &mut BytesMut {
        &mut self.inner.state.buffer
    }
}

impl<T, D> Stream for FramedRead<T, D>
where
    T: AsyncRead,
    D: Decoder,
{
    type Item = Result<D::Item, Error<D::Error>>;

    fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
        self.project().inner.poll_next(cx)
    }
}

impl<T, I, D> Sink<I> for FramedRead<T, D>
where
    T: Sink<I>,
{
    type Error = T::Error;

    fn poll_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
        self.project().inner.project().inner.poll_ready(cx)
    }

    fn start_send(self: Pin<&mut Self>, item: I) -> Result<(), Self::Error> {
        self.project().inner.project().inner.start_send(item)
    }

    fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
        self.project().inner.project().inner.poll_flush(cx)
    }

    fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
        self.project().inner.project().inner.poll_close(cx)
    }
}

impl<T, D> fmt::Debug for FramedRead<T, D>
where
    T: fmt::Debug,
    D: fmt::Debug,
{
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        f.debug_struct("FramedRead")
            .field("inner", &self.get_ref())
            .field("decoder", &self.decoder())
            .field("buffer", &self.read_buffer())
            .finish()
    }
}