1 /*
2  * Copyright (C) 2017 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef AAPT_IO_BIGBUFFERINPUTSTREAM_H
18 #define AAPT_IO_BIGBUFFERINPUTSTREAM_H
19 
20 #include "io/Io.h"
21 #include "util/BigBuffer.h"
22 
23 namespace aapt {
24 namespace io {
25 
26 class BigBufferInputStream : public InputStream {
27  public:
BigBufferInputStream(const BigBuffer * buffer)28   inline explicit BigBufferInputStream(const BigBuffer* buffer)
29       : buffer_(buffer), iter_(buffer->begin()) {}
30   virtual ~BigBufferInputStream() = default;
31 
32   bool Next(const void** data, size_t* size) override;
33 
34   void BackUp(size_t count) override;
35 
36   bool CanRewind() const override;
37 
38   bool Rewind() override;
39 
40   size_t ByteCount() const override;
41 
42   bool HadError() const override;
43 
44  private:
45   DISALLOW_COPY_AND_ASSIGN(BigBufferInputStream);
46 
47   const BigBuffer* buffer_;
48   BigBuffer::const_iterator iter_;
49   size_t offset_ = 0;
50   size_t bytes_read_ = 0;
51 };
52 
53 }  // namespace io
54 }  // namespace aapt
55 
56 #endif  // AAPT_IO_BIGBUFFERINPUTSTREAM_H
57