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oct-iostrm.h
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1997-08-20
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/*
Copyright (C) 1996 John W. Eaton
This file is part of Octave.
Octave 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.
Octave 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 Octave; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#if !defined (octave_octave_iostream_h)
#define octave_octave_iostream_h 1
#include "oct-stream.h"
class istream;
class ostream;
class
octave_base_iostream : public octave_base_stream
{
public:
octave_base_iostream (const string& n = string (),
ios::openmode md = ios::in|ios::out,
oct_mach_info::float_format flt_fmt =
oct_mach_info::native)
: octave_base_stream (md, flt_fmt), nm (n) { }
~octave_base_iostream (void) { }
// Position a stream at OFFSET relative to ORIGIN.
int seek (streamoff offset, ios::seek_dir origin);
// Return current stream position.
long tell (void) const;
// Return non-zero if EOF has been reached on this stream.
bool eof (void) const;
// The name of the file.
string name (void);
protected:
void invalid_operation (void) const;
private:
string nm;
virtual const char *stream_type (void) const = 0;
// No copying!
octave_base_iostream (const octave_base_iostream&);
octave_base_iostream& operator = (const octave_base_iostream&);
};
class
octave_istream : public octave_base_iostream
{
public:
octave_istream (istream *arg = 0, const string& nm = string ())
: octave_base_iostream (nm, ios::in, oct_mach_info::native),
is (arg) { }
~octave_istream (void) { }
istream *input_stream (void) { return is; }
ostream *output_stream (void) { return 0; }
private:
istream *is;
const char *stream_type (void) const { return "octave_istream"; }
// No copying!
octave_istream (const octave_istream&);
octave_istream& operator = (const octave_istream&);
};
class
octave_ostream : public octave_base_iostream
{
public:
octave_ostream (ostream *arg, const string& nm = string ())
: octave_base_iostream (nm, ios::out, oct_mach_info::native),
os (arg) { }
~octave_ostream (void) { }
istream *input_stream (void) { return 0; }
ostream *output_stream (void) { return os; }
private:
ostream *os;
const char *stream_type (void) const { return "octave_ostream"; }
// No copying!
octave_ostream (const octave_ostream&);
octave_ostream& operator = (const octave_ostream&);
};
#endif
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/