1 // Copyright 2020 The Android Open Source Project
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 #pragma once
15 
16 #include "aemu/base/Compiler.h"
17 #include "aemu/base/containers/SmallVector.h"
18 #include "aemu/base/files/Stream.h"
19 
20 namespace android {
21 namespace base {
22 
23 class CompressingStream : public Stream {
24     DISALLOW_COPY_AND_ASSIGN(CompressingStream);
25 
26 public:
27     CompressingStream(Stream& output);
28     ~CompressingStream();
29 
30     ssize_t read(void* buffer, size_t size) override;
31     ssize_t write(const void* buffer, size_t size) override;
32 
33 private:
34     Stream& mOutput;
35     void* mLzStream;
36     SmallFixedVector<char, 512> mBuffer;
37 };
38 
39 }  // namespace base
40 }  // namespace android
41