1 // Copyright 2016 The Chromium OS Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "bsdiff/buffer_file.h" 6 7 #include "bsdiff/bspatch.h" 8 9 namespace bsdiff { 10 11 BufferFile::BufferFile(std::unique_ptr<FileInterface> file, size_t size) 12 : file_(std::move(file)) { 13 buffer_.reserve(size); 14 } 15 16 BufferFile::~BufferFile() { 17 Close(); 18 } 19 20 bool BufferFile::Read(void* buf, size_t count, size_t* bytes_read) { 21 return false; 22 } 23 24 bool BufferFile::Write(const void* buf, size_t count, size_t* bytes_written) { 25 const uint8_t* data = static_cast<const uint8_t*>(buf); 26 buffer_.insert(buffer_.end(), data, data + count); 27 *bytes_written = count; 28 return true; 29 } 30 31 bool BufferFile::Seek(off_t pos) { 32 return false; 33 } 34 35 bool BufferFile::Close() { 36 if (!WriteAll(file_, buffer_.data(), buffer_.size())) 37 return false; 38 // Prevent writing |buffer_| to |file_| again if Close() is called more than 39 // once. 40 buffer_.clear(); 41 return file_->Close(); 42 } 43 44 bool BufferFile::GetSize(uint64_t* size) { 45 *size = buffer_.size(); 46 return true; 47 } 48 49 } // namespace bsdiff 50
