LCOV - code coverage report
Current view: top level - ext - stdio_filebuf.h (source / functions) Hit Total Coverage
Test: stap.info Lines: 0 12 0.0 %
Date: 2013-03-08 Functions: 0 3 0.0 %
Branches: 0 8 0.0 %

           Branch data     Line data    Source code
       1                 :            : // File descriptor layer for filebuf -*- C++ -*-
       2                 :            : 
       3                 :            : // Copyright (C) 2002, 2003, 2004, 2005, 2009, 2010
       4                 :            : // 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 3, 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                 :            : // Under Section 7 of GPL version 3, you are granted additional
      18                 :            : // permissions described in the GCC Runtime Library Exception, version
      19                 :            : // 3.1, as published by the Free Software Foundation.
      20                 :            : 
      21                 :            : // You should have received a copy of the GNU General Public License and
      22                 :            : // a copy of the GCC Runtime Library Exception along with this program;
      23                 :            : // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
      24                 :            : // <http://www.gnu.org/licenses/>.
      25                 :            : 
      26                 :            : /** @file ext/stdio_filebuf.h
      27                 :            :  *  This file is a GNU extension to the Standard C++ Library.
      28                 :            :  */
      29                 :            : 
      30                 :            : #ifndef _STDIO_FILEBUF_H
      31                 :            : #define _STDIO_FILEBUF_H 1
      32                 :            : 
      33                 :            : #pragma GCC system_header
      34                 :            : 
      35                 :            : #include <fstream>
      36                 :            : 
      37                 :            : namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
      38                 :            : {
      39                 :            : _GLIBCXX_BEGIN_NAMESPACE_VERSION
      40                 :            : 
      41                 :            :   /**
      42                 :            :    *  @brief Provides a layer of compatibility for C/POSIX.
      43                 :            :    *  @ingroup io
      44                 :            :    *
      45                 :            :    *  This GNU extension provides extensions for working with standard C
      46                 :            :    *  FILE*'s and POSIX file descriptors.  It must be instantiated by the
      47                 :            :    *  user with the type of character used in the file stream, e.g.,
      48                 :            :    *  stdio_filebuf<char>.
      49                 :            :   */
      50                 :            :   template<typename _CharT, typename _Traits = std::char_traits<_CharT> >
      51                 :            :     class stdio_filebuf : public std::basic_filebuf<_CharT, _Traits>
      52                 :            :     {
      53                 :            :     public:
      54                 :            :       // Types:
      55                 :            :       typedef _CharT                                    char_type;
      56                 :            :       typedef _Traits                                   traits_type;
      57                 :            :       typedef typename traits_type::int_type            int_type;
      58                 :            :       typedef typename traits_type::pos_type            pos_type;
      59                 :            :       typedef typename traits_type::off_type            off_type;
      60                 :            :       typedef std::size_t                               size_t;
      61                 :            : 
      62                 :            :     public:
      63                 :            :       /**
      64                 :            :        * deferred initialization
      65                 :            :       */
      66                 :            :       stdio_filebuf() : std::basic_filebuf<_CharT, _Traits>() {}
      67                 :            : 
      68                 :            :       /**
      69                 :            :        *  @param  __fd  An open file descriptor.
      70                 :            :        *  @param  __mode  Same meaning as in a standard filebuf.
      71                 :            :        *  @param  __size Optimal or preferred size of internal buffer,
      72                 :            :        *                 in chars.
      73                 :            :        *
      74                 :            :        *  This constructor associates a file stream buffer with an open
      75                 :            :        *  POSIX file descriptor. The file descriptor will be automatically
      76                 :            :        *  closed when the stdio_filebuf is closed/destroyed.
      77                 :            :       */
      78                 :            :       stdio_filebuf(int __fd, std::ios_base::openmode __mode,
      79                 :            :                     size_t __size = static_cast<size_t>(BUFSIZ));
      80                 :            : 
      81                 :            :       /**
      82                 :            :        *  @param  __f  An open @c FILE*.
      83                 :            :        *  @param  __mode  Same meaning as in a standard filebuf.
      84                 :            :        *  @param  __size Optimal or preferred size of internal buffer,
      85                 :            :        *                 in chars.  Defaults to system's @c BUFSIZ.
      86                 :            :        *
      87                 :            :        *  This constructor associates a file stream buffer with an open
      88                 :            :        *  C @c FILE*.  The @c FILE* will not be automatically closed when the
      89                 :            :        *  stdio_filebuf is closed/destroyed.
      90                 :            :       */
      91                 :            :       stdio_filebuf(std::__c_file* __f, std::ios_base::openmode __mode,
      92                 :            :                     size_t __size = static_cast<size_t>(BUFSIZ));
      93                 :            : 
      94                 :            :       /**
      95                 :            :        *  Closes the external data stream if the file descriptor constructor
      96                 :            :        *  was used.
      97                 :            :       */
      98                 :            :       virtual
      99                 :            :       ~stdio_filebuf();
     100                 :            : 
     101                 :            :       /**
     102                 :            :        *  @return  The underlying file descriptor.
     103                 :            :        *
     104                 :            :        *  Once associated with an external data stream, this function can be
     105                 :            :        *  used to access the underlying POSIX file descriptor.  Note that
     106                 :            :        *  there is no way for the library to track what you do with the
     107                 :            :        *  descriptor, so be careful.
     108                 :            :       */
     109                 :            :       int
     110                 :            :       fd() { return this->_M_file.fd(); }
     111                 :            : 
     112                 :            :       /**
     113                 :            :        *  @return  The underlying FILE*.
     114                 :            :        *
     115                 :            :        *  This function can be used to access the underlying "C" file pointer.
     116                 :            :        *  Note that there is no way for the library to track what you do
     117                 :            :        *  with the file, so be careful.
     118                 :            :        */
     119                 :            :       std::__c_file*
     120                 :            :       file() { return this->_M_file.file(); }
     121                 :            :     };
     122                 :            : 
     123                 :            :   template<typename _CharT, typename _Traits>
     124                 :          0 :     stdio_filebuf<_CharT, _Traits>::~stdio_filebuf()
     125         [ #  # ]:          0 :     { }
     126                 :            : 
     127                 :            :   template<typename _CharT, typename _Traits>
     128                 :          0 :     stdio_filebuf<_CharT, _Traits>::
     129                 :          0 :     stdio_filebuf(int __fd, std::ios_base::openmode __mode, size_t __size)
     130                 :            :     {
     131                 :          0 :       this->_M_file.sys_open(__fd, __mode);
     132         [ #  # ]:          0 :       if (this->is_open())
     133                 :            :         {
     134                 :          0 :           this->_M_mode = __mode;
     135                 :          0 :           this->_M_buf_size = __size;
     136         [ #  # ]:          0 :           this->_M_allocate_internal_buffer();
     137                 :          0 :           this->_M_reading = false;
     138                 :          0 :           this->_M_writing = false;
     139         [ #  # ]:          0 :           this->_M_set_buffer(-1);
     140                 :            :         }
     141                 :            :     }
     142                 :            : 
     143                 :            :   template<typename _CharT, typename _Traits>
     144                 :            :     stdio_filebuf<_CharT, _Traits>::
     145                 :            :     stdio_filebuf(std::__c_file* __f, std::ios_base::openmode __mode,
     146                 :            :                   size_t __size)
     147                 :            :     {
     148                 :            :       this->_M_file.sys_open(__f, __mode);
     149                 :            :       if (this->is_open())
     150                 :            :         {
     151                 :            :           this->_M_mode = __mode;
     152                 :            :           this->_M_buf_size = __size;
     153                 :            :           this->_M_allocate_internal_buffer();
     154                 :            :           this->_M_reading = false;
     155                 :            :           this->_M_writing = false;
     156                 :            :           this->_M_set_buffer(-1);
     157                 :            :         }
     158                 :            :     }
     159                 :            : 
     160                 :            : _GLIBCXX_END_NAMESPACE_VERSION
     161                 :            : } // namespace
     162                 :            : 
     163                 :            : #endif

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