-
Notifications
You must be signed in to change notification settings - Fork 267
/
lz4_compress.go
57 lines (46 loc) · 1.48 KB
/
lz4_compress.go
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
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 compressor
import (
"fmt"
"github.com/pierrec/lz4/v4"
)
type Lz4 struct {
}
func (l *Lz4) Compress(data []byte) ([]byte, error) {
buffer := make([]byte, lz4.CompressBlockBound(len(data)))
var compressor lz4.Compressor
n, err := compressor.CompressBlock(data, buffer)
if err != nil {
return nil, err
}
if n >= len(data) {
return nil, fmt.Errorf("`%s` is not compressible", string(data))
}
return buffer[:n], nil
}
func (l *Lz4) Decompress(in []byte) ([]byte, error) {
out := make([]byte, 100*len(in))
n, err := lz4.UncompressBlock(in, out)
if err != nil {
return nil, err
}
return out[:n], nil
}
func (l *Lz4) GetCompressorType() CompressorType {
return CompressorLz4
}