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 #ifndef _BSDIFF_MEMORY_FILE_H_ 6 #define _BSDIFF_MEMORY_FILE_H_ 7 8 #include <memory> 9 10 #include "bsdiff/file_interface.h" 11 12 namespace bsdiff { 13 14 class MemoryFile : public FileInterface { 15 public: 16 // Creates a read only MemoryFile based on the underlying |data| passed. 17 // The MemoryFile will use data starting from |data| with length of |size| as 18 // the file content. Write is not supported. 19 MemoryFile(const uint8_t* data, size_t size); 20 21 ~MemoryFile() = default; 22 23 // FileInterface overrides. 24 bool Read(void* buf, size_t count, size_t* bytes_read) override; 25 bool Write(const void* buf, size_t count, size_t* bytes_written) override; 26 bool Seek(off_t pos) override; 27 bool Close() override; 28 bool GetSize(uint64_t* size) override; 29 30 private: 31 const uint8_t* data_ = nullptr; 32 size_t size_ = 0; 33 off_t offset_ = 0; 34 }; 35 36 } // namespace bsdiff 37 38 #endif // _BSDIFF_MEMORY_FILE_H_ 39
