libio/fstream.h

   1 /* This is part of libio/iostream, providing -*- C++ -*- input/output.
   2 Copyright (C) 1993, 2000 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 #ifndef _FSTREAM_H
  26 #define _FSTREAM_H
  27 #ifdef __GNUG__
  28 #pragma interface
  29 #endif
  30 #include <iostream.h>
  31
  32 extern "C++" {
  33 class fstreambase : virtual public ios {
  34 #ifdef _IO_NEW_STREAMS
  35     mutable filebuf __my_fb; // mutable so rdbuf() can be const
  36 #endif
  37     void __fb_init ();
  38   public:
  39     fstreambase();
  40     fstreambase(int fd);
  41     fstreambase(int fd, char *p, int l); /* Deprecated */
  42     fstreambase(const char *name, int mode, int prot=0664);
  43     void close();
  44 #ifdef _IO_NEW_STREAMS
  45     filebuf* rdbuf() const { return &__my_fb; }
  46 #else
  47     filebuf* rdbuf() const { return (filebuf*) ios::rdbuf(); }
  48 #endif
  49     void open(const char *name, int mode, int prot=0664);
  50     int is_open() const { return rdbuf()->is_open(); }
  51     void setbuf(char *ptr, int len) { rdbuf()->setbuf(ptr, len); }
  52     void attach(int fd);
  53 #ifdef _STREAM_COMPAT
  54     int filedesc() { return rdbuf()->fd(); }
  55     fstreambase& raw() { rdbuf()->setbuf(NULL, 0); return *this; }
  56 #endif
  57 };
  58
  59 class ifstream : public fstreambase, public istream {
  60   public:
  61     ifstream() : fstreambase() { }
  62     ifstream(int fd) : fstreambase(fd) { }
  63     ifstream(int fd, char *p, int l) : fstreambase(fd, p, l) { } /*Deprecated*/
  64     ifstream(const char *name, int mode=ios::in, int prot=0664)
  65         : fstreambase(name, mode | ios::in, prot) { }
  66     void open(const char *name, int mode=ios::in, int prot=0664)
  67         { fstreambase::open(name, mode | ios::in, prot); }
  68 };
  69
  70 class ofstream : public fstreambase, public ostream {
  71   public:
  72     ofstream() : fstreambase() { }
  73     ofstream(int fd) : fstreambase(fd) { }
  74     ofstream(int fd, char *p, int l) : fstreambase(fd, p, l) { } /*Deprecated*/
  75     ofstream(const char *name, int mode=ios::out, int prot=0664)
  76         : fstreambase(name, mode | ios::out, prot) { }
  77     void open(const char *name, int mode=ios::out, int prot=0664)
  78         { fstreambase::open(name, mode | ios::out, prot); }
  79 };
  80
  81 class fstream : public fstreambase, public iostream {
  82   public:
  83     fstream() : fstreambase() { }
  84     fstream(int fd) : fstreambase(fd) { }
  85     fstream(const char *name, int mode, int prot=0664)
  86         : fstreambase(name, mode, prot) { }
  87     fstream(int fd, char *p, int l) : fstreambase(fd, p, l) { } /*Deprecated*/
  88     void open(const char *name, int mode, int prot=0664)
  89         { fstreambase::open(name, mode, prot); }
  90 };
  91 } // extern "C++"
  92 #endif /*!_FSTREAM_H*/