-
Notifications
You must be signed in to change notification settings - Fork 3
/
lz4.go
72 lines (60 loc) · 1.48 KB
/
lz4.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
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
package lz4Kit
import (
"bytes"
"github.com/pierrec/lz4/v4"
"github.com/richelieu-yang/chimera/v3/src/file/fileKit"
"io"
"os"
)
var (
NewWriter func(w io.Writer) *lz4.Writer = lz4.NewWriter
NewReader func(r io.Reader) *lz4.Reader = lz4.NewReader
)
func Compress(data []byte) (compressedData []byte, err error) {
buf := bytes.NewBuffer(nil)
lz4Writer := lz4.NewWriter(buf)
_, err = lz4Writer.Write(data)
if err != nil {
return
}
// !!!: 需要先 关闭Writer 再调用 buf.Bytes().
if err = lz4Writer.Close(); err != nil {
return nil, err
}
compressedData = buf.Bytes()
return
}
func Decompress(compressedData []byte) (decompressData []byte, err error) {
lz4Reader := lz4.NewReader(bytes.NewReader(compressedData))
decompressData, err = io.ReadAll(lz4Reader)
return
}
// CompressFile
/*
@param dest (1) 建议文件后缀为 ".lz4"
(2) 如果已经存在 && 是个文件,会覆盖.
*/
func CompressFile(src, dest string) error {
if err := fileKit.AssertExistAndIsFile(src); err != nil {
return err
}
if err := fileKit.AssertNotExistOrIsFile(dest); err != nil {
return err
}
// 读取原始文件内容
inputData, err := os.ReadFile(src)
if err != nil {
return err
}
// 使用lz4.NewWriter创建压缩器,写入到一个新的文件
destFile, err := os.Create(dest)
if err != nil {
return err
}
defer destFile.Close()
lz4Writer := lz4.NewWriter(destFile)
defer lz4Writer.Close()
// 写入压缩数据
_, err = lz4Writer.Write(inputData)
return err
}