buffered_reader/
decompress_bzip2.rs

1use std::io;
2use std::fmt;
3
4use bzip2::read::BzDecoder;
5
6use super::*;
7
8
9/// Decompresses the underlying `BufferedReader` using the bzip2
10/// algorithm.
11#[derive(Debug)]
12pub struct Bzip<R: BufferedReader<C>, C: fmt::Debug + Sync + Send> {
13    reader: Generic<BzDecoder<R>, C>,
14}
15
16assert_send_and_sync!(Bzip<R, C>
17                      where R: BufferedReader<C>,
18                            C: fmt::Debug);
19
20impl <R: BufferedReader<()>> Bzip<R, ()> {
21    /// Instantiates a new bzip decompression reader.
22    ///
23    /// `reader` is the source to wrap.
24    pub fn new(reader: R) -> Self {
25        Self::with_cookie(reader, ())
26    }
27}
28
29impl <R: BufferedReader<C>, C: fmt::Debug + Sync + Send> Bzip<R, C> {
30    /// Like [`Self::new`], but uses a cookie.
31    ///
32    /// The cookie can be retrieved using the [`BufferedReader::cookie_ref`] and
33    /// [`BufferedReader::cookie_mut`] methods, and set using the [`BufferedReader::cookie_set`] method.
34    pub fn with_cookie(reader: R, cookie: C) -> Self {
35        Bzip {
36            reader: Generic::with_cookie(
37                BzDecoder::new(reader), None, cookie),
38        }
39    }
40}
41
42impl<R: BufferedReader<C>, C: fmt::Debug + Sync + Send> io::Read for Bzip<R, C> {
43    fn read(&mut self, buf: &mut [u8]) -> Result<usize, io::Error> {
44        self.reader.read(buf)
45    }
46}
47
48impl<R: BufferedReader<C>, C: fmt::Debug + Sync + Send> fmt::Display for Bzip<R, C> {
49    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
50        f.debug_struct("Bzip").finish()
51    }
52}
53
54impl<R: BufferedReader<C>, C: fmt::Debug + Send + Sync> BufferedReader<C> for Bzip<R, C> {
55    fn buffer(&self) -> &[u8] {
56        self.reader.buffer()
57    }
58
59    fn data(&mut self, amount: usize) -> Result<&[u8], io::Error> {
60        self.reader.data(amount)
61    }
62
63    fn data_hard(&mut self, amount: usize) -> Result<&[u8], io::Error> {
64        self.reader.data_hard(amount)
65    }
66
67    fn data_eof(&mut self) -> Result<&[u8], io::Error> {
68        self.reader.data_eof()
69    }
70
71    fn consume(&mut self, amount: usize) -> &[u8] {
72        self.reader.consume(amount)
73    }
74
75    fn data_consume(&mut self, amount: usize)
76                    -> Result<&[u8], io::Error> {
77        self.reader.data_consume(amount)
78    }
79
80    fn data_consume_hard(&mut self, amount: usize) -> Result<&[u8], io::Error> {
81        self.reader.data_consume_hard(amount)
82    }
83
84    fn read_be_u16(&mut self) -> Result<u16, io::Error> {
85        self.reader.read_be_u16()
86    }
87
88    fn read_be_u32(&mut self) -> Result<u32, io::Error> {
89        self.reader.read_be_u32()
90    }
91
92    fn steal(&mut self, amount: usize) -> Result<Vec<u8>, io::Error> {
93        self.reader.steal(amount)
94    }
95
96    fn steal_eof(&mut self) -> Result<Vec<u8>, io::Error> {
97        self.reader.steal_eof()
98    }
99
100    fn get_mut(&mut self) -> Option<&mut dyn BufferedReader<C>> {
101        Some(self.reader.reader_mut().get_mut())
102    }
103
104    fn get_ref(&self) -> Option<&dyn BufferedReader<C>> {
105        Some(self.reader.reader_ref().get_ref())
106    }
107
108    fn into_inner<'b>(self: Box<Self>)
109            -> Option<Box<dyn BufferedReader<C> + 'b>> where Self: 'b {
110        // Strip the outer box.
111        Some(self.reader.into_reader().into_inner().into_boxed())
112    }
113
114    fn cookie_set(&mut self, cookie: C) -> C {
115        self.reader.cookie_set(cookie)
116    }
117
118    fn cookie_ref(&self) -> &C {
119        self.reader.cookie_ref()
120    }
121
122    fn cookie_mut(&mut self) -> &mut C {
123        self.reader.cookie_mut()
124    }
125}
buffered_reader/decompress_bzip2.rs

buffered_reader/
decompress_bzip2.rs
