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OS/2 Shareware BBS: 10 Tools
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octa21fs.zip
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octave
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octave-2.1.23
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oct-fstrm.cc
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2000-01-15
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/*
Copyright (C) 1996, 1997 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.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <cerrno>
#include <cstring>
#include "error.h"
#include "oct-fstrm.h"
octave_stream
octave_fstream::create (const string& nm_arg, ios::openmode md,
oct_mach_info::float_format flt_fmt)
{
return octave_stream (new octave_fstream (nm_arg, md, flt_fmt));
}
octave_fstream::octave_fstream (const string& nm_arg,
ios::openmode md = ios::in|ios::out,
oct_mach_info::float_format flt_fmt)
: octave_base_stream (md, flt_fmt), nm (nm_arg)
{
// Override default protection of 0664 so that umask will appear to
// do the right thing.
fs.open (nm.c_str (), md, 0666);
if (! fs)
error (strerror (errno));
}
// Position a stream at OFFSET relative to ORIGIN.
int
octave_fstream::seek (streamoff offset, ios::seek_dir origin)
{
int retval = -1;
if (! fs.bad ())
{
fs.clear ();
filebuf *fb = fs.rdbuf ();
if (fb)
{
fb->seekoff (offset, origin);
retval = fs.bad () ? -1 : 0;
}
}
return retval;
}
// Return current stream position.
long
octave_fstream::tell (void) const
{
long retval = -1;
if (fs)
{
filebuf *fb = fs.rdbuf ();
retval = static_cast<long> (fb->seekoff (0, ios::cur));
}
return retval;
}
// Return non-zero if EOF has been reached on this stream.
bool
octave_fstream::eof (void) const
{
return fs.eof ();
}
istream *
octave_fstream::input_stream (void)
{
istream *retval = 0;
if (mode () & ios::in)
retval = &fs;
return retval;
}
ostream *
octave_fstream::output_stream (void)
{
ostream *retval = 0;
if (mode () & ios::out)
retval = &fs;
return retval;
}
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/