/
zstd.go
41 lines (33 loc) · 1014 Bytes
/
zstd.go
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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
package compression
import (
"github.com/klauspost/compress/zstd"
"github.com/siderolabs/gen/ensure"
)
// ZStd returns zstd compressor.
func ZStd() Compressor {
return &zstdCompressor{
encoder: ensure.Value(zstd.NewWriter(
nil,
zstd.WithEncoderConcurrency(2),
zstd.WithWindowSize(zstd.MinWindowSize),
)),
decoder: ensure.Value(zstd.NewReader(nil, zstd.WithDecoderConcurrency(0))),
}
}
var _ Compressor = (*zstdCompressor)(nil)
type zstdCompressor struct {
encoder *zstd.Encoder
decoder *zstd.Decoder
}
func (z *zstdCompressor) Compress(prefix, data []byte) ([]byte, error) {
return z.encoder.EncodeAll(data, prefix), nil
}
func (z *zstdCompressor) Decompress(data []byte) ([]byte, error) {
return z.decoder.DecodeAll(data, nil)
}
func (z *zstdCompressor) ID() byte {
return 'z'
}