mirror of https://github.com/go-gitea/gitea.git
60 lines
1.3 KiB
Go
60 lines
1.3 KiB
Go
package archiver
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"path/filepath"
|
|
|
|
"github.com/klauspost/compress/zstd"
|
|
)
|
|
|
|
// Zstd facilitates Zstandard compression.
|
|
type Zstd struct {
|
|
}
|
|
|
|
// Compress reads in, compresses it, and writes it to out.
|
|
func (zs *Zstd) Compress(in io.Reader, out io.Writer) error {
|
|
w, err := zstd.NewWriter(out)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer w.Close()
|
|
_, err = io.Copy(w, in)
|
|
return err
|
|
}
|
|
|
|
// Decompress reads in, decompresses it, and writes it to out.
|
|
func (zs *Zstd) Decompress(in io.Reader, out io.Writer) error {
|
|
r, err := zstd.NewReader(in)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer r.Close()
|
|
_, err = io.Copy(out, r)
|
|
return err
|
|
}
|
|
|
|
// CheckExt ensures the file extension matches the format.
|
|
func (zs *Zstd) CheckExt(filename string) error {
|
|
if filepath.Ext(filename) != ".zst" {
|
|
return fmt.Errorf("filename must have a .zst extension")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (zs *Zstd) String() string { return "zstd" }
|
|
|
|
// NewZstd returns a new, default instance ready to be customized and used.
|
|
func NewZstd() *Zstd {
|
|
return new(Zstd)
|
|
}
|
|
|
|
// Compile-time checks to ensure type implements desired interfaces.
|
|
var (
|
|
_ = Compressor(new(Zstd))
|
|
_ = Decompressor(new(Zstd))
|
|
)
|
|
|
|
// DefaultZstd is a default instance that is conveniently ready to use.
|
|
var DefaultZstd = NewZstd()
|