blob: 87096445c082e3229e614ffa873e194e227769dd (
plain)
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
|
package csvwriter
import (
"bytes"
"os"
)
type CsvWriter struct {
f *os.File
buf bytes.Buffer
}
func NewCsvWriter(path string) (*CsvWriter, error) {
f, err := os.Create(path)
if err != nil {
return nil, err
}
w := &CsvWriter{
f: f,
}
return w, nil
}
func (c *CsvWriter) Close() error {
c.Sync()
return c.f.Close()
}
func (c *CsvWriter) Write(strs []string) error {
for i, str := range strs {
if i != 0 {
_, err := c.buf.Write([]byte(","))
if err != nil {
return err
}
}
_, err := c.buf.Write([]byte(str))
if err != nil {
return err
}
}
c.buf.WriteByte('\n')
if c.buf.Len() > 1*1024*1024 {
err := c.Sync()
if err != nil {
return err
}
}
return nil
}
func (c *CsvWriter) Sync() error {
_, err := c.f.Write(c.buf.Bytes())
if err != nil {
return err
}
c.buf.Reset()
return nil
}
|
