57 lines
1.1 KiB
Go
57 lines
1.1 KiB
Go
package ledger_bigtable
|
|
|
|
import (
|
|
"bytes"
|
|
"compress/bzip2"
|
|
"compress/gzip"
|
|
"fmt"
|
|
"github.com/klauspost/compress/zstd"
|
|
"io"
|
|
)
|
|
|
|
type bigtableCompression uint
|
|
|
|
const (
|
|
bigtableCompressionNone bigtableCompression = 0
|
|
bigtableCompressionBzip2 bigtableCompression = 1
|
|
bigtableCompressionGzip bigtableCompression = 2
|
|
bigtableCompressionZstd bigtableCompression = 3
|
|
)
|
|
|
|
func (c bigtableCompression) String() string {
|
|
switch c {
|
|
case bigtableCompressionBzip2:
|
|
return "bzip2"
|
|
case bigtableCompressionGzip:
|
|
return "gzip"
|
|
case bigtableCompressionZstd:
|
|
return "zstd"
|
|
default:
|
|
return "none"
|
|
}
|
|
}
|
|
|
|
func (c bigtableCompression) Uncompress(b []byte) ([]byte, error) {
|
|
r := bytes.NewReader(b)
|
|
var o io.Reader
|
|
var err error
|
|
|
|
switch c {
|
|
case bigtableCompressionBzip2:
|
|
o = bzip2.NewReader(r)
|
|
case bigtableCompressionGzip:
|
|
o, err = gzip.NewReader(r)
|
|
case bigtableCompressionZstd:
|
|
o, err = zstd.NewReader(r)
|
|
case bigtableCompressionNone:
|
|
return b, nil
|
|
default:
|
|
return nil, fmt.Errorf("unknown compression type: %d", c)
|
|
}
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return io.ReadAll(o)
|
|
}
|