1 // Copyright 2015 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_FILE_H_
6 #define _BSDIFF_FILE_H_
7 
8 #include <memory>
9 
10 #include "bsdiff/file_interface.h"
11 
12 namespace bsdiff {
13 
14 class File : public FileInterface {
15  public:
16   // Opens a file |pathname| with flags |flags| as defined by open(2). In case
17   // of error, an empty unique_ptr is returned and errno is set accordingly.
18   static std::unique_ptr<File> FOpen(const char* pathname, int flags);
19 
20   ~File() override;
21 
22   // FileInterface overrides.
23   bool Read(void* buf, size_t count, size_t* bytes_read) override;
24   bool Write(const void* buf, size_t count, size_t* bytes_written) override;
25   bool Seek(off_t pos) override;
26   bool Close() override;
27   bool GetSize(uint64_t* size) override;
28 
29  private:
30   // Creates the File instance for the |fd|. Takes ownership of the file
31   // descriptor.
32   explicit File(int fd);
33 
34   int fd_;
35 };
36 
37 }  // namespace bsdiff
38 
39 #endif  // _BSDIFF_FILE_H_
40