| // 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 compression |
| |
| import ( |
| "bytes" |
| ) |
| |
| type noopProvider struct{} |
| |
| // NewNoopProvider returns a Provider interface that does not compress the data |
| func NewNoopProvider() Provider { |
| return &noopProvider{} |
| } |
| |
| func (noopProvider) CompressMaxSize(originalSize int) int { |
| return originalSize |
| } |
| |
| func (noopProvider) Compress(dst, src []byte) []byte { |
| if dst == nil { |
| dst = make([]byte, len(src)) |
| } |
| |
| b := bytes.NewBuffer(dst[:0]) |
| b.Write(src) |
| return dst[:len(src)] |
| } |
| |
| func (noopProvider) Decompress(dst, src []byte, originalSize int) ([]byte, error) { |
| if dst == nil { |
| dst = make([]byte, len(src)) |
| } |
| |
| b := bytes.NewBuffer(dst[:0]) |
| b.Write(src) |
| return dst[:len(src)], nil |
| } |
| |
| func (noopProvider) Close() error { |
| return nil |
| } |
| |
| func (noopProvider) Clone() Provider { |
| return NewNoopProvider() |
| } |