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
|
// Package bzip2 implements the Bzip2 decompressor.
package bzip2
import (
"compress/bzip2"
"errors"
"fmt"
"io"
)
type readCloser struct {
c io.Closer
r io.Reader
}
var (
errAlreadyClosed = errors.New("bzip2: already closed")
errNeedOneReader = errors.New("bzip2: need exactly one reader")
)
func (rc *readCloser) Close() error {
if rc.c == nil || rc.r == nil {
return errAlreadyClosed
}
if err := rc.c.Close(); err != nil {
return fmt.Errorf("bzip2: error closing: %w", err)
}
rc.c, rc.r = nil, nil
return nil
}
func (rc *readCloser) Read(p []byte) (int, error) {
if rc.r == nil {
return 0, errAlreadyClosed
}
n, err := rc.r.Read(p)
if err != nil && !errors.Is(err, io.EOF) {
err = fmt.Errorf("bzip2: error reading: %w", err)
}
return n, err
}
// NewReader returns a new bzip2 io.ReadCloser.
func NewReader(_ []byte, _ uint64, readers []io.ReadCloser) (io.ReadCloser, error) {
if len(readers) != 1 {
return nil, errNeedOneReader
}
return &readCloser{
c: readers[0],
r: bzip2.NewReader(readers[0]),
}, nil
}
|
