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#include "vector_output_stream.h"
18
19#include "base/logging.h"
20
21namespace art {
22
23VectorOutputStream::VectorOutputStream(const std::string& location, std::vector<uint8_t>& vector)
24  : OutputStream(location), offset_(vector.size()), vector_(vector) {}
25
26off_t VectorOutputStream::Seek(off_t offset, Whence whence) {
27  CHECK(whence == kSeekSet || whence == kSeekCurrent || whence == kSeekEnd) << whence;
28  off_t new_offset = 0;
29  switch (whence) {
30    case kSeekSet: {
31      new_offset = offset;
32      break;
33    }
34    case kSeekCurrent: {
35      new_offset = offset_ + offset;
36      break;
37    }
38    case kSeekEnd: {
39      new_offset = vector_.size() + offset;
40      break;
41    }
42  }
43  EnsureCapacity(new_offset);
44  offset_ = new_offset;
45  return offset_;
46}
47
48}  // namespace art
49