basic_file_stdio.h

俄罗斯高人Mamaich的Pocket gcc编译器（运行在PocketPC上）的全部源代码。

// Wrapper of C-language FILE struct -*- C++ -*-

// Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING.  If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.

// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.

//
// ISO C++ 14882: 27.8  File-based streams
//

/** @file basic_file.h
 *  This is an internal header file, included by other library headers.
 *  You should not attempt to use it directly.
 */

#ifndef _CPP_BASIC_FILE
#define _CPP_BASIC_FILE 1

#pragma GCC system_header

#include <bits/c++config.h>
#include <ios>

namespace std 
{
  // Generic declaration.
  template<typename _CharT>
    class __basic_file; 

  // Specialization.
  template<>
    class __basic_file<char>
    {
      // Underlying data source/sink.
      __c_file* 	_M_cfile;
      // True iff we opened _M_cfile, and thus must close it ourselves.
      bool 		_M_cfile_created;

    public:
      __basic_file(__c_lock* __lock = 0);
      
      void 
      _M_open_mode(ios_base::openmode __mode, int& __p_mode, int& __rw_mode, 
		   char* __c_mode);
      
      __basic_file* 
      open(const char* __name, ios_base::openmode __mode, int __prot = 0664);

      __basic_file*
      sys_open(__c_file* __file, ios_base::openmode);

      __basic_file*
      sys_open(int __fd, ios_base::openmode __mode, bool __del);

      int
      sys_getc();

      int
      sys_ungetc(int);

      __basic_file* 
      close(); 

      bool 
      is_open() const;

      int 
      fd();

      ~__basic_file();

      streamsize 
      xsputn(const char* __s, streamsize __n);

      streamsize 
      xsgetn(char* __s, streamsize __n);

      streamoff
      seekoff(streamoff __off, ios_base::seekdir __way,
	      ios_base::openmode __mode = ios_base::in | ios_base::out);

      streamoff
      seekpos(streamoff __pos, 
	      ios_base::openmode __mode = ios_base::in | ios_base::out);

      int 
      sync();

      streamsize
      showmanyc_helper();
    };
}  // namespace std

#endif	// _CPP_BASIC_FILE