libio/builtinbuf.h

   1 /*
   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 #ifndef _BUILTINBUF_H
  26 #define _BUILTINBUF_H
  27
  28 #ifdef __GNUC__
  29 #pragma interface
  30 #endif
  31
  32 #include <streambuf.h>
  33
  34 #if !_IO_UNIFIED_JUMPTABLES
  35 // A builtinbuf is a streambuf where all the virtual operations
  36 // call the _IO_jump_t table.
  37
  38 extern "C++" {
  39 class builtinbuf : public streambuf {
  40   friend ios;
  41   virtual int overflow(int);
  42   virtual int underflow();
  43   virtual streamsize xsgetn(char *, streamsize);
  44   virtual streamsize xsputn(const char *, streamsize);
  45   virtual streambuf* setbuf(char*, int);
  46   virtual int doallocate();
  47   virtual ~builtinbuf();
  48   virtual int sync();
  49
  50   virtual streampos seekoff(streamoff, _seek_dir, int mode=ios::in|ios::out);
  51   virtual streampos seekpos(streampos pos, int mode = ios::in|ios::out);
  52   virtual int pbackfail(int c);
  53   virtual streamsize sys_read(char* buf, streamsize size);
  54   virtual streampos sys_seek(streamoff, _seek_dir);
  55   virtual streamsize sys_write(const char*, streamsize);
  56   virtual int sys_stat(void*); // Actually, a (struct stat*)
  57   virtual int sys_close();
  58 #if 0
  59   virtual int get_column();
  60   virtual int set_column(int);
  61 #endif
  62  private:
  63   builtinbuf() { }
  64 };
  65 } // extern "C++"
  66 #endif
  67
  68 #endif /* _BUILTINBUF_H */