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oct-stdstrm.h
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C/C++ Source or Header
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1997-08-20
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4KB
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171 lines
/*
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_stdiostream_h)
#define octave_octave_stdiostream_h 1
#include <stdiostream.h>
#include "oct-stream.h"
class
octave_base_stdiostream : public octave_base_stream
{
public:
octave_base_stdiostream (const string& n, FILE *f,
ios::openmode arg_md = ios::in|ios::out,
oct_mach_info::float_format flt_fmt =
oct_mach_info::native)
: octave_base_stream (arg_md, flt_fmt), nm (n), fp (f) { }
~octave_base_stdiostream (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;
// The name of the file.
string name (void) { return nm; }
virtual stdiobuf *rdbuf (void) const = 0;
virtual bool bad (void) const = 0;
virtual void clear (void) = 0;
protected:
string nm;
FILE *fp;
// No copying!
octave_base_stdiostream (const octave_base_stdiostream&);
octave_base_stdiostream& operator = (const octave_base_stdiostream&);
};
class
octave_istdiostream : public octave_base_stdiostream
{
public:
octave_istdiostream (const string& n, FILE *f = 0,
ios::openmode arg_md = ios::in,
oct_mach_info::float_format flt_fmt =
oct_mach_info::native);
~octave_istdiostream (void);
// Return non-zero if EOF has been reached on this stream.
bool eof (void) const { return is ? is->eof () : true; }
istream *input_stream (void) { return is; }
ostream *output_stream (void) { return 0; }
// XXX FIXME XXX -- should not have to cast away const here.
stdiobuf *rdbuf (void) const
{ return is ? ((istdiostream *) is)->rdbuf () : 0; }
bool bad (void) const { return is ? is->bad () : true; }
void clear (void)
{
if (is)
is->clear ();
}
protected:
istdiostream *is;
private:
// No copying!
octave_istdiostream (const octave_istdiostream&);
octave_istdiostream& operator = (const octave_istdiostream&);
};
class
octave_ostdiostream : public octave_base_stdiostream
{
public:
octave_ostdiostream (const string& n, FILE *f = 0,
ios::openmode arg_md = ios::out,
oct_mach_info::float_format flt_fmt =
oct_mach_info::native);
~octave_ostdiostream (void);
// Return non-zero if EOF has been reached on this stream.
bool eof (void) const { return os ? os->eof () : true; }
istream *input_stream (void) { return 0; }
ostream *output_stream (void) { return os; }
// XXX FIXME XXX -- should not have to cast away const here.
stdiobuf *rdbuf (void) const
{ return os ? ((ostdiostream *) os)->rdbuf () : 0; }
bool bad (void) const { return os ? os->bad () : true; }
void clear (void)
{
if (os)
os->clear ();
}
protected:
ostdiostream *os;
private:
// No copying!
octave_ostdiostream (const octave_ostdiostream&);
octave_ostdiostream& operator = (const octave_ostdiostream&);
};
#endif
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/