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
23namespace aapt {
24namespace io {
25
26class BigBufferInputStream : public InputStream {
27 public:
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