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tree-const.cc
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1996-09-28
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5KB
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266 lines
// tree-const.cc -*- C++ -*-
/*
Copyright (C) 1992, 1993, 1994, 1995 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, 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <iostream.h>
#include "tree-const.h"
#include "error.h"
#include "gripes.h"
#include "user-prefs.h"
#include "oct-map.h"
Octave_map
tree_constant::map_value (void) const
{
return rep->map_value ();
}
tree_constant::~tree_constant (void)
{
#if defined (MDEBUG)
cerr << "~tree_constant: rep: " << rep
<< " rep->count: " << rep->count << "\n";
#endif
if (--rep->count <= 0)
{
delete rep;
rep = 0;
}
}
#if defined (MDEBUG)
void *
tree_constant::operator new (size_t size)
{
tree_constant *p = ::new tree_constant;
cerr << "tree_constant::new(): " << p << "\n";
return p;
}
void
tree_constant::operator delete (void *p, size_t size)
{
cerr << "tree_constant::delete(): " << p << "\n";
::delete p;
}
#endif
// Simple assignment.
tree_constant
tree_constant::operator = (const tree_constant& a)
{
if (rep != a.rep)
{
if (--rep->count <= 0)
delete rep;
rep = a.rep;
rep->count++;
}
return *this;
}
tree_constant
tree_constant::lookup_map_element (SLList<char*>& list)
{
tree_constant retval;
tree_constant_rep *tmp_rep = rep;
Pix p = list.first ();
while (p)
{
char *elt = list (p);
list.next (p);
tree_constant tmp = tmp_rep->lookup_map_element (elt);
if (error_state)
break;
tmp_rep = tmp.rep;
if (! p)
retval = tmp;
}
return retval;
}
// Simple structure assignment.
void
tree_constant::make_unique (void)
{
if (rep->count > 1)
{
--rep->count;
rep = new tree_constant_rep (*rep);
rep->count = 1;
}
if (rep->is_map ())
{
for (Pix p = rep->a_map->first (); p != 0; rep->a_map->next (p))
{
rep->a_map->contents (p) . make_unique ();
}
}
}
tree_constant::tree_constant_rep *
tree_constant::make_unique_map (void)
{
if (! rep->is_map ())
{
if (--rep->count <= 0)
delete rep;
Octave_map m;
rep = new tree_constant_rep (m);
rep->count = 1;
}
make_unique ();
return rep;
}
tree_constant
tree_constant::assign_map_element (SLList<char*>& list,
tree_constant& rhs)
{
tree_constant_rep *tmp_rep = make_unique_map ();
if (rhs.is_map ())
rhs.make_unique ();
Pix p = list.first ();
while (p)
{
char *elt = list (p);
list.next (p);
tree_constant& tmp = tmp_rep->lookup_map_element (elt, 1);
if (! p)
{
tmp = rhs;
return tmp;
}
tmp_rep = tmp.make_unique_map ();
}
return tree_constant ();
}
// Indexed structure assignment.
tree_constant
tree_constant::assign_map_element (SLList<char*>& list,
tree_constant& rhs,
const Octave_object& args)
{
tree_constant_rep *tmp_rep = make_unique_map ();
if (rhs.is_map ())
rhs.make_unique ();
Pix p = list.first ();
while (p)
{
char *elt = list (p);
list.next (p);
tree_constant& tmp = tmp_rep->lookup_map_element (elt, 1);
if (! p)
{
tmp.assign (rhs, args);
return tmp;
}
tmp_rep = tmp.make_unique_map ();
}
return tree_constant ();
}
void
tree_constant::print_code (ostream& os)
{
print_code_indent (os);
if (in_parens)
os << "(";
if (rep)
rep->print_code (os);
if (in_parens)
os << ")";
}
// Construct return vector of empty matrices. Return empty matrices
// and/or gripe when appropriate.
Octave_object
vector_of_empties (int nargout, const char *fcn_name)
{
Octave_object retval;
// Got an empty argument, check if should gripe/return empty values.
int flag = user_pref.propagate_empty_matrices;
if (flag != 0)
{
if (flag < 0)
gripe_empty_arg (fcn_name, 0);
Matrix m;
retval.resize (nargout ? nargout : 1);
for (int i = 0; i < nargout; i++)
retval(i) = m;
}
else
gripe_empty_arg (fcn_name, 1);
return retval;
}
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; page-delimiter: "^/\\*" ***
;;; End: ***
*/