Repository navigation
Expand file tree
/
Copy pathprogress.go
More file actions
90 lines (76 loc) · 2.15 KB
/
Copy pathprogress.go
File metadata and controls
90 lines (76 loc) · 2.15 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
<
8000
div data-line-number="25" class="react-line-number react-code-text" style="padding-right:16px">2526
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
/*
* Minio Cloud Storage, (C) 2019 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package s3select
import (
"compress/bzip2"
"fmt"
"io"
"sync/atomic"
gzip "github.com/klauspost/pgzip"
)
type countUpReader struct {
reader io.Reader
bytesRead int64
}
func (r *countUpReader) Read(p []byte) (n int, err error) {
n, err = r.reader.Read(p)
atomic.AddInt64(&r.bytesRead, int64(n))
return n, err
}
func (r *countUpReader) BytesRead() int64 {
return atomic.LoadInt64(&r.bytesRead)
}
func newCountUpReader(reader io.Reader) *countUpReader {
return &countUpReader{
reader: reader,
}
}
type progressReader struct {
rc io.ReadCloser
scannedReader *countUpReader
processedReader *countUpReader
}
func (pr *progressReader) Read(p []byte) (n int, err error) {
return pr.processedReader.Read(p)
}
func (pr *progressReader) Close() error {
return pr.rc.Close()
}
func (pr *progressReader) Stats() (bytesScanned, bytesProcessed int64) {
return pr.scannedReader.BytesRead(), pr.processedReader.BytesRead()
}
func newProgressReader(rc io.ReadCloser, compType CompressionType) (*progressReader, error) {
scannedReader := newCountUpReader(rc)
var r io.Reader
var err error
switch compType {
case noneType:
r = scannedReader
case gzipType:
if r, err = gzip.NewReader(scannedReader); err != nil {
return nil, errTruncatedInput(err)
}
case bzip2Type:
r = bzip2.NewReader(scannedReader)
default:
return nil, errInvalidCompressionFormat(fmt.Errorf("unknown compression type '%v'", compType))
}
return &progressReader{
rc: rc,
scannedReader: scannedReader,
processedReader: newCountUpReader(r),
}, nil
}