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 <android-base/logging.h>
20
21 namespace art {
22
VectorOutputStream(const std::string & location,std::vector<uint8_t> * vector)23 VectorOutputStream::VectorOutputStream(const std::string& location, std::vector<uint8_t>* vector)
24 : OutputStream(location), offset_(vector->size()), vector_(vector) {}
25
Seek(off_t offset,Whence whence)26 off_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