1/*
2 * Copyright (C) 2013 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 ART_COMPILER_VECTOR_OUTPUT_STREAM_H_
18#define ART_COMPILER_VECTOR_OUTPUT_STREAM_H_
19
20#include "output_stream.h"
21
22#include <string>
23#include <string.h>
24#include <vector>
25
26namespace art {
27
28class VectorOutputStream : public OutputStream {
29 public:
30  VectorOutputStream(const std::string& location, std::vector<uint8_t>& vector);
31
32  virtual ~VectorOutputStream() {}
33
34  bool WriteFully(const void* buffer, size_t byte_count) {
35    if (static_cast<size_t>(offset_) == vector_.size()) {
36      const uint8_t* start = reinterpret_cast<const uint8_t*>(buffer);
37      vector_.insert(vector_.end(), &start[0], &start[byte_count]);
38      offset_ += byte_count;
39    } else {
40      off_t new_offset = offset_ + byte_count;
41      EnsureCapacity(new_offset);
42      memcpy(&vector_[offset_], buffer, byte_count);
43      offset_ = new_offset;
44    }
45    return true;
46  }
47
48  off_t Seek(off_t offset, Whence whence);
49
50 private:
51  void EnsureCapacity(off_t new_offset) {
52    if (new_offset > static_cast<off_t>(vector_.size())) {
53      vector_.resize(new_offset);
54    }
55  }
56
57  off_t offset_;
58  std::vector<uint8_t>& vector_;
59
60  DISALLOW_COPY_AND_ASSIGN(VectorOutputStream);
61};
62
63}  // namespace art
64
65#endif  // ART_COMPILER_VECTOR_OUTPUT_STREAM_H_
66