sing-box/common/geosite/writer.go

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2022-07-04 11:39:58 +00:00
package geosite
import (
"bytes"
"io"
"sort"
"github.com/sagernet/sing/common/rw"
)
func Write(writer io.Writer, domains map[string][]Item) error {
keys := make([]string, 0, len(domains))
for code := range domains {
keys = append(keys, code)
}
sort.Strings(keys)
content := &bytes.Buffer{}
index := make(map[string]int)
for _, code := range keys {
index[code] = content.Len()
for _, domain := range domains[code] {
err := rw.WriteByte(content, byte(domain.Type))
if err != nil {
return err
}
if err = rw.WriteVString(content, domain.Value); err != nil {
return err
}
}
}
err := rw.WriteByte(writer, 0)
if err != nil {
return err
}
err = rw.WriteUVariant(writer, uint64(len(keys)))
if err != nil {
return err
}
for _, code := range keys {
err = rw.WriteVString(writer, code)
if err != nil {
return err
}
err = rw.WriteUVariant(writer, uint64(index[code]))
if err != nil {
return err
}
err = rw.WriteUVariant(writer, uint64(len(domains[code])))
if err != nil {
return err
}
}
_, err = writer.Write(content.Bytes())
if err != nil {
return err
}
return nil
}