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octa21fs.zip
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octave
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octave-2.1.23
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oct-obj.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.
*/
#if defined (__GNUG__)
#pragma implementation
#endif
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "error.h"
#include "oct-obj.h"
octave_allocator
octave_value_list::allocator (sizeof (octave_value_list));
octave_value_list&
octave_value_list::prepend (const octave_value& val)
{
int n = length ();
resize (n + 1);
while (n > 0)
{
elem (n) = elem (n - 1);
n--;
}
elem (0) = val;
return *this;
}
octave_value_list&
octave_value_list::append (const octave_value& val)
{
int n = length ();
resize (n + 1);
elem (n) = val;
return *this;
}
octave_value_list&
octave_value_list::append (const octave_value_list& lst)
{
int len = length ();
int lst_len = lst.length ();
resize (len + lst_len);
for (int i = 0; i < lst_len; i++)
elem (len + i) = lst (i);
return *this;
}
octave_value_list&
octave_value_list::reverse (void)
{
int n = length ();
for (int i = 0; i < n / 2; i++)
{
octave_value tmp = elem (i);
elem (i) = elem (n - i - 1);
elem (n - i - 1) = tmp;
}
return *this;
}
octave_value_list
octave_value_list::splice (int offset, int rep_length,
const octave_value_list& lst) const
{
octave_value_list retval;
int len = length ();
if (offset < 0 || offset >= len)
{
if (! (rep_length == 0 && offset == len))
{
error ("octave_value_list::splice: invalid OFFSET");
return retval;
}
}
if (rep_length < 0 || rep_length + offset > len)
{
error ("octave_value_list::splice: invalid LENGTH");
return retval;
}
int lst_len = lst.length ();
int new_len = len - rep_length + lst_len;
retval.resize (new_len);
int k = 0;
for (int i = 0; i < offset; i++)
retval(k++) = elem (i);
for (int i = 0; i < lst_len; i++)
retval(k++) = lst(i);
for (int i = offset + rep_length; i < len; i++)
retval(k++) = elem (i);
return retval;
}
octave_value_list
octave_value_list::index (idx_vector& i) const
{
return octave_value_list (data.index (i));
}
bool
octave_value_list::all_strings_p (void) const
{
int n = length ();
for (int i = 0; i < n; i++)
if (! elem(i).is_string ())
return 0;
return 1;
}
string_vector
octave_value_list::make_argv (const string& fcn_name) const
{
string_vector argv;
if (all_strings_p ())
{
int len = length ();
int total_nr = 0;
for (int i = 0; i < len; i++)
{
// An empty string ("") has zero columns and zero rows (a
// change that was made for Matlab contemptibility.
int n = elem(i).rows ();
total_nr += n ? n : 1;
}
argv.resize (total_nr+1);
argv[0] = fcn_name;
int k = 1;
for (int i = 0; i < len; i++)
{
int nr = elem(i).rows ();
if (nr < 2)
argv[k++] = elem(i).string_value ();
else
{
string_vector tmp = elem(i).all_strings ();
for (int j = 0; j < nr; j++)
argv[k++] = tmp[j];
}
}
}
else
error ("%s: expecting all arguments to be strings", fcn_name.c_str ());
return argv;
}
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/