headers/cpp/stdiostream.h

   1 /* This is part of libio/iostream, providing -*- C++ -*- input/output.
   2 Copyright (C) 1993 Free Software Foundation
   3
   4 This file is part of the GNU IO Library.  This library is free
   5 software; you can redistribute it and/or modify it under the
   6 terms of the GNU General Public License as published by the
   7 Free Software Foundation; either version 2, or (at your option)
   8 any later version.
   9
  10 This library is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this library; see the file COPYING.  If not, write to the Free
  17 Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 As a special exception, if you link this library with files
  20 compiled with a GNU compiler to produce an executable, this does not cause
  21 the resulting executable to be covered by the GNU General Public License.
  22 This exception does not however invalidate any other reasons why
  23 the executable file might be covered by the GNU General Public License. */
  24
  25 /* Written by Per Bothner (bothner@cygnus.com). */
  26
  27 #ifndef _STDIOSTREAM_H
  28 #define _STDIOSTREAM_H
  29
  30 #ifdef __GNUG__
  31 #pragma interface
  32 #endif
  33
  34 #include <iostream.h>
  35 #include <stdio.h>
  36
  37 extern "C++" {
  38 class stdiobuf : public filebuf {
  39   protected:
  40     FILE *_file;
  41   public:
  42     FILE* stdiofile() const { return _file; }
  43     stdiobuf(FILE *);
  44     ~stdiobuf();
  45     int buffered () const { return _flags & _IO_UNBUFFERED ? 0 : 1; }
  46     void buffered (int);
  47     virtual streamsize sys_read(char*, streamsize);
  48     virtual streampos sys_seek(streamoff, _seek_dir);
  49     virtual streamsize sys_write(const char*, streamsize);
  50     virtual int sys_close();
  51     virtual int sync();
  52     virtual int overflow(int c = EOF);
  53     streamsize xsputn(const char* s, streamsize n);
  54 };
  55
  56 class istdiostream : public istream
  57 {
  58 private:
  59   stdiobuf _file;
  60 public:
  61   istdiostream (FILE* __f) : istream(), _file(__f) { init(&_file); }
  62   stdiobuf* rdbuf()/* const */ { return &_file; }
  63   int buffered () const { return _file.buffered (); }
  64   void buffered (int _i) { _file.buffered (_i); }
  65 };
  66
  67 class ostdiostream : public ostream
  68 {
  69 private:
  70   stdiobuf _file;
  71 public:
  72   ostdiostream (FILE* __f) : ostream(), _file(__f) { init(&_file); }
  73   stdiobuf* rdbuf() /* const */ { return &_file; }
  74   int buffered () const { return _file.buffered (); }
  75   void buffered (int _i) { _file.buffered (_i); }
  76 };
  77 } // extern "C++"
  78
  79 #endif /* !_STDIOSTREAM_H */