43 lines
1.2 KiB
Go
43 lines
1.2 KiB
Go
// Copyright 2026 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package compressedio
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import (
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"io"
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"github.com/klauspost/compress/gzip"
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"github.com/klauspost/compress/snappy"
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"github.com/klauspost/compress/zstd"
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)
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// NewReader read compressed data.
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// only for test now.
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func NewReader(compressType CompressType, cfg DecompressConfig, r io.Reader) (io.Reader, error) {
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switch compressType {
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case Gzip:
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return gzip.NewReader(r)
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case Snappy:
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return snappy.NewReader(r), nil
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case Zstd:
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options := []zstd.DOption{}
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if cfg.ZStdDecodeConcurrency > 0 {
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options = append(options, zstd.WithDecoderConcurrency(cfg.ZStdDecodeConcurrency))
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}
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return zstd.NewReader(r, options...)
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default:
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return nil, nil
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}
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}
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