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1 | // -*- C++ -*- | |
2 | // Testing filebuf for the C++ library testsuite. | |
3 | // | |
4 | // Copyright (C) 2003 Free Software Foundation, Inc. | |
5 | // | |
6 | // This file is part of the GNU ISO C++ Library. This library is free | |
7 | // software; you can redistribute it and/or modify it under the | |
8 | // terms of the GNU General Public License as published by the | |
9 | // Free Software Foundation; either version 2, or (at your option) | |
10 | // any later version. | |
11 | // | |
12 | // This library is distributed in the hope that it will be useful, | |
13 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | // GNU General Public License for more details. | |
16 | // | |
17 | // You should have received a copy of the GNU General Public License along | |
18 | // with this library; see the file COPYING. If not, write to the Free | |
19 | // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
20 | // USA. | |
21 | // | |
22 | // As a special exception, you may use this file as part of a free software | |
23 | // library without restriction. Specifically, if other files instantiate | |
24 | // templates or use macros or inline functions from this file, or you compile | |
25 | // this file and link it with other files to produce an executable, this | |
26 | // file does not by itself cause the resulting executable to be covered by | |
27 | // the GNU General Public License. This exception does not however | |
28 | // invalidate any other reasons why the executable file might be covered by | |
29 | // the GNU General Public License. | |
30 | ||
31 | #ifndef _GLIBCXX_TESTSUITE_IO_H | |
32 | #define _GLIBCXX_TESTSUITE_IO_H | |
33 | ||
34 | #include <fstream> | |
35 | ||
36 | namespace __gnu_test | |
37 | { | |
38 | // Used to verify the constraints/requirements on get and put areas | |
39 | // as defined in | |
40 | // 27.5.1 - Stream buffer requirements: get and put areas | |
41 | // 27.8.1.1 - Template class basic_filebuf p 3 | |
42 | // If the file is not open (ios_base::in) -> input seq. cannot be read | |
43 | // If the file is not open (ios_base::out) -> output seq. cannot be written | |
44 | // Joint file position | |
45 | // 27.8.1.4 - Overridden virtual functions p9 | |
46 | // If unbuffered, pbase == pptr == NULL | |
47 | class constraint_filebuf: public std::filebuf | |
48 | { | |
49 | public: | |
50 | bool | |
51 | write_position() | |
52 | { | |
53 | bool two = this->pptr() != NULL; | |
54 | bool one = this->pptr() < this->epptr(); | |
55 | return one && two; | |
56 | } | |
57 | ||
58 | bool | |
59 | read_position() | |
60 | { | |
61 | bool one = this->gptr() != NULL; | |
62 | bool two = this->gptr() < this->egptr(); | |
63 | ||
64 | return one && two; | |
65 | } | |
66 | ||
67 | bool | |
68 | unbuffered() | |
69 | { | |
70 | bool one = this->pbase() == NULL; | |
71 | bool two = this->pptr() == NULL; | |
72 | return one && two; | |
73 | } | |
74 | ||
75 | }; | |
76 | ||
77 | // Used to check if basic_streambuf::pubsync() has been called. | |
78 | // This is useful for checking if a function creates [io]stream::sentry | |
79 | // objects, since the sentry constructors call tie()->flush(). | |
80 | class sync_streambuf : public std::streambuf | |
81 | { | |
82 | private: | |
83 | bool m_sync_called; | |
84 | ||
85 | public: | |
86 | sync_streambuf() | |
87 | : m_sync_called(false) | |
88 | { } | |
89 | ||
90 | bool sync_called() const | |
91 | { return m_sync_called; } | |
92 | ||
93 | protected: | |
94 | int sync() | |
95 | { | |
96 | m_sync_called = true; | |
97 | return 0; | |
98 | } | |
99 | }; | |
100 | }; // namespace __gnu_test | |
101 | ||
102 | #endif // _GLIBCXX_TESTSUITE_IO_H | |
103 |