// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package compress

import (
	
	
	

	
)

type gzipCodec struct{}

func (gzipCodec) ( io.Reader) io.ReadCloser {
	,  := gzip.NewReader()
	if  != nil {
		panic(fmt.Errorf("codec: gzip: %w", ))
	}
	return 
}

func (gzipCodec) (,  []byte) []byte {
	,  := gzip.NewReader(bytes.NewReader())
	if  != nil {
		panic()
	}

	if  != nil {
		,  := io.ReadFull(, )
		if  != nil {
			panic()
		}
		return [:]
	}

	,  = io.ReadAll()
	if  != nil {
		panic()
	}

	return 
}

func ( gzipCodec) (,  []byte,  int) []byte {
	 := int(.CompressBound(int64(len())))
	if  == nil || cap() <  {
		 = make([]byte, 0, )
	}
	 := bytes.NewBuffer([:0])
	,  := gzip.NewWriterLevel(, )
	if  != nil {
		panic()
	}
	_,  = .Write()
	if  != nil {
		panic()
	}
	if  := .Close();  != nil {
		panic()
	}
	return .Bytes()
}

func ( gzipCodec) (,  []byte) []byte {
	return .EncodeLevel(, , DefaultCompressionLevel)
}

func (gzipCodec) ( int64) int64 {
	return  + (( + 7) >> 3) + (( + 63) >> 6) + 5
}

func (gzipCodec) ( io.Writer) io.WriteCloser {
	return gzip.NewWriter()
}

func (gzipCodec) ( io.Writer,  int) (io.WriteCloser, error) {
	return gzip.NewWriterLevel(, )
}

func init() {
	RegisterCodec(Codecs.Gzip, gzipCodec{})
}