1 | // |
2 | // FileStream_POSIX.h |
3 | // |
4 | // Library: Foundation |
5 | // Package: Streams |
6 | // Module: FileStream |
7 | // |
8 | // Definition of the FileStreamBuf, FileInputStream and FileOutputStream classes. |
9 | // |
10 | // Copyright (c) 2007, Applied Informatics Software Engineering GmbH. |
11 | // and Contributors. |
12 | // |
13 | // SPDX-License-Identifier: BSL-1.0 |
14 | // |
15 | |
16 | |
17 | #ifndef Foundation_FileStream_POSIX_INCLUDED |
18 | #define Foundation_FileStream_POSIX_INCLUDED |
19 | |
20 | |
21 | #include "Poco/Foundation.h" |
22 | #include "Poco/BufferedBidirectionalStreamBuf.h" |
23 | #include <istream> |
24 | #include <ostream> |
25 | |
26 | |
27 | namespace Poco { |
28 | |
29 | |
30 | class Foundation_API FileStreamBuf: public BufferedBidirectionalStreamBuf |
31 | /// This stream buffer handles Fileio |
32 | { |
33 | public: |
34 | FileStreamBuf(); |
35 | /// Creates a FileStreamBuf. |
36 | |
37 | ~FileStreamBuf(); |
38 | /// Destroys the FileStream. |
39 | |
40 | void open(const std::string& path, std::ios::openmode mode); |
41 | /// Opens the given file in the given mode. |
42 | |
43 | bool close(); |
44 | /// Closes the File stream buffer. Returns true if successful, |
45 | /// false otherwise. |
46 | |
47 | std::streampos seekoff(std::streamoff off, std::ios::seekdir dir, std::ios::openmode mode = std::ios::in | std::ios::out); |
48 | /// Change position by offset, according to way and mode. |
49 | |
50 | std::streampos seekpos(std::streampos pos, std::ios::openmode mode = std::ios::in | std::ios::out); |
51 | /// Change to specified position, according to mode. |
52 | |
53 | protected: |
54 | enum |
55 | { |
56 | BUFFER_SIZE = 4096 |
57 | }; |
58 | |
59 | int readFromDevice(char* buffer, std::streamsize length); |
60 | int writeToDevice(const char* buffer, std::streamsize length); |
61 | |
62 | private: |
63 | std::string _path; |
64 | int _fd; |
65 | std::streamoff _pos; |
66 | }; |
67 | |
68 | |
69 | } // namespace Poco |
70 | |
71 | |
72 | #endif // Foundation_FileStream_WIN32_INCLUDED |
73 | |