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 
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