basic_file.h

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00001 // Wrapper of C-language FILE struct -*- C++ -*-
00002 
00003 // Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
00004 //
00005 // This file is part of the GNU ISO C++ Library.  This library is free
00006 // software; you can redistribute it and/or modify it under the
00007 // terms of the GNU General Public License as published by the
00008 // Free Software Foundation; either version 2, or (at your option)
00009 // any later version.
00010 
00011 // This library is distributed in the hope that it will be useful,
00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014 // GNU General Public License for more details.
00015 
00016 // You should have received a copy of the GNU General Public License along
00017 // with this library; see the file COPYING.  If not, write to the Free
00018 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
00019 // USA.
00020 
00021 // As a special exception, you may use this file as part of a free software
00022 // library without restriction.  Specifically, if other files instantiate
00023 // templates or use macros or inline functions from this file, or you compile
00024 // this file and link it with other files to produce an executable, this
00025 // file does not by itself cause the resulting executable to be covered by
00026 // the GNU General Public License.  This exception does not however
00027 // invalidate any other reasons why the executable file might be covered by
00028 // the GNU General Public License.
00029 
00030 //
00031 // ISO C++ 14882: 27.8  File-based streams
00032 //
00033 
00034 /** @file basic_file.h
00035  *  This is an internal header file, included by other library headers.
00036  *  You should not attempt to use it directly.
00037  */
00038 
00039 #ifndef _CPP_BASIC_FILE
00040 #define _CPP_BASIC_FILE 1
00041 
00042 #pragma GCC system_header
00043 
00044 #include <bits/c++config.h>
00045 #include <ios>
00046 
00047 namespace std 
00048 {
00049   // Generic declaration.
00050   template<typename _CharT>
00051     class __basic_file; 
00052 
00053   // Specialization.
00054   template<>
00055     class __basic_file<char>
00056     {
00057       // Underlying data source/sink.
00058       __c_file*     _M_cfile;
00059       // True iff we opened _M_cfile, and thus must close it ourselves.
00060       bool      _M_cfile_created;
00061 
00062     public:
00063       __basic_file(__c_lock* __lock = 0);
00064       
00065       void 
00066       _M_open_mode(ios_base::openmode __mode, int& __p_mode, int& __rw_mode, 
00067            char* __c_mode);
00068       
00069       __basic_file* 
00070       open(const char* __name, ios_base::openmode __mode, int __prot = 0664);
00071 
00072       __basic_file*
00073       sys_open(__c_file* __file, ios_base::openmode);
00074 
00075       __basic_file*
00076       sys_open(int __fd, ios_base::openmode __mode, bool __del);
00077 
00078       int
00079       sys_getc();
00080 
00081       int
00082       sys_ungetc(int);
00083 
00084       __basic_file* 
00085       close(); 
00086 
00087       bool 
00088       is_open() const;
00089 
00090       int 
00091       fd();
00092 
00093       ~__basic_file();
00094 
00095       streamsize 
00096       xsputn(const char* __s, streamsize __n);
00097 
00098       streamsize 
00099       xsgetn(char* __s, streamsize __n);
00100 
00101       streamoff
00102       seekoff(streamoff __off, ios_base::seekdir __way,
00103           ios_base::openmode __mode = ios_base::in | ios_base::out);
00104 
00105       streamoff
00106       seekpos(streamoff __pos, 
00107           ios_base::openmode __mode = ios_base::in | ios_base::out);
00108 
00109       int 
00110       sync();
00111 
00112       streamsize
00113       showmanyc_helper();
00114     };
00115 }  // namespace std
00116 
00117 #endif  // _CPP_BASIC_FILE

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