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ArgNode.C
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C/C++ Source or Header
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1998-11-23
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// $Id: ArgNode.C,v 1.9 1998/11/23 17:43:15 zeller Exp $
// ArgNode class
// Copyright (C) 1995 Technische Universitaet Braunschweig, Germany.
// Written by Andreas Zeller <zeller@ips.cs.tu-bs.de>.
//
// This file is part of DDD.
//
// DDD 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 of the License, or (at your option) any later version.
//
// DDD 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 DDD -- see the file COPYING.
// If not, write to the Free Software Foundation, Inc.,
// 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
// DDD is the data display debugger.
// For details, see the DDD World-Wide-Web page,
// `http://www.cs.tu-bs.de/softech/ddd/',
// or send a mail to the DDD developers <ddd@ips.cs.tu-bs.de>.
char ArgNode_rcsid[] =
"$Id: ArgNode.C,v 1.9 1998/11/23 17:43:15 zeller Exp $";
#ifdef __GNUG__
#pragma implementation
#endif
#include <strstream.h>
#include "assert.h"
#include "VSLLib.h"
#include "ArgNode.h"
#include "VSLDef.h"
DEFINE_TYPE_INFO_1(ArgNode, DummyNode)
// ArgNode
ArgNodeFunc ArgNode::matchCallback = 0;
// Evaluate argument
const Box *ArgNode::_eval(ListBox *arglist) const
{
const Box *box = 0;
if (arglist)
{
box = (*arglist)[_id];
if (box)
box = ((Box *)box)->link();
}
if (box == 0)
{
ostrstream os;
os << "arg" << _id << " cannot be isolated";
VSLLib::eval_error(os);
}
return box;
}
// Dump ArgNode
void ArgNode::dump(ostream& s) const
{
s << "arg" << _id;
}
// Dump as tree
void ArgNode::_dumpTree(ostream& s) const
{
s << _id;
}
bool ArgNode::matches(const VSLNode &node) const
{
bool ret = matchesAll ||
VSLNode::matches(node) &&
_id == ((ArgNode *)&node)->_id; // dirty trick
if (ret && matchCallback)
matchCallback(_id, &node);
return ret;
}
// Optimization
// instantiateArgs: in expressions f(arg1, arg2, ...), replace
// arg1 .. argn by actual arguments
// Replace NODE by corresponding expr from VALUES
int ArgNode::instantiateArgs(VSLDef *, VSLNode **node, VSLNode *values[],
unsigned base, unsigned n)
{
assert(this == *node);
// Abort if out of area
if (_id < base || _id >= base + n)
return 0;
VSLNode *source = values[_id];
assert (source != 0);
VSLNode *newNode = source->dup();
*node = newNode;
#if 0
if (VSEFlags::show_optimize)
{
cout << "\n" << cdef->longname() << ": instantiateArgs: replacing\n"
<< *this << "\nby " << *newNode << '\n';
cout.flush();
}
#endif
// Delete ArgNode
delete this;
return 1;
}
// Increase instance counter
void ArgNode::countArgNodes(VSLDef *, int instances[],
unsigned base, unsigned n)
{
// Ignore if out of area
if (_id < base || _id >= base + n)
return;
instances[_id]++;
}