projects / thirdparty / gcc.git / blame
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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 _GLIBCPP_TESTSUITE_IO_H | |
| 32 | #define _GLIBCPP_TESTSUITE_IO_H | |
| 33 | ||
| 34 | #include <fstream> | |
| 35 | ||
| 36 | namespace __gnu_cxx_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 | }; // namespace __gnu_cxx_test | |
| 77 | ||
| 78 | #endif // _GLIBCPP_TESTSUITE_IO_H | |
| 79 |