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// Maria temporal binary operator class -*- c++ -*-
#ifdef __GNUC__
# pragma implementation
#endif // __GNUC__
#include "TemporalBinop.h"
#include "BoolType.h"
#include "Net.h"
#include "Property.h"
#include "Printer.h"
/** @file TemporalBinop.C
* Temporal binary operators
*/
/* Copyright 1998-2002 Marko Mkel (msmakela@tcs.hut.fi).
This file is part of MARIA, a reachability analyzer and model checker
for high-level Petri nets.
MARIA 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.
MARIA 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.
The GNU General Public License is often shipped with GNU software, and
is generally kept in a file called COPYING or LICENSE. If you do not
have a copy of the license, write to the Free Software Foundation,
59 Temple Place, Suite 330, Boston, MA 02111 USA. */
TemporalBinop::TemporalBinop (enum Op op,
class Expression& left,
class Expression& right) :
Expression (),
myOp (op), myLeft (&left), myRight (&right)
{
assert (myLeft->getType ()->getKind () == Type::tBool);
assert (myRight->getType ()->getKind () == Type::tBool);
setType (Net::getBoolType ());
}
TemporalBinop::~TemporalBinop ()
{
myLeft->destroy ();
myRight->destroy ();
}
class Expression*
TemporalBinop::ground (const class Valuation& valuation,
class Transition* transition,
bool declare)
{
class Expression* left = myLeft->ground (valuation, transition, declare);
if (!left) return NULL;
class Expression* right = myRight->ground (valuation, transition, declare);
if (!right) { left->destroy (); return NULL; }
assert (valuation.isOK ());
if (left == myLeft && right == myRight) {
left->destroy ();
right->destroy ();
return copy ();
}
else
return (new class TemporalBinop (myOp, *left, *right))->cse ();
}
class Expression*
TemporalBinop::substitute (class Substitution& substitution)
{
class Expression* left = myLeft->substitute (substitution);
class Expression* right = myRight->substitute (substitution);
if (!left || !right) {
left->destroy ();
right->destroy ();
return NULL;
}
if (left == myLeft && right == myRight) {
left->destroy ();
right->destroy ();
return copy ();
}
else
return (new class TemporalBinop (myOp, *left, *right))->cse ();
}
bool
TemporalBinop::depends (const class VariableSet& vars,
bool complement) const
{
return
myLeft->depends (vars, complement) ||
myRight->depends (vars, complement);
}
bool
TemporalBinop::forExpressions (bool (*operation)
(const class Expression&,void*),
void* data) const
{
return
(*operation) (*this, data) &&
myLeft->forExpressions (operation, data) &&
myRight->forExpressions (operation, data);
}
class Ltl*
TemporalBinop::toFormula (class Property& property)
{
switch (myOp) {
case Until:
return property.addBinop (Property::opUntil, *myLeft, *myRight);
case Release:
return property.addBinop (Property::opRelease, *myLeft, *myRight);
}
assert (false);
return 0;
}
/** Convert an operator to a string
* @param op the operator to convert
* @return a string corresponding to the operator
*/
static const char*
getOpString (enum TemporalBinop::Op op)
{
switch (op) {
case TemporalBinop::Until:
return "until";
case TemporalBinop::Release:
return "release";
}
return "???";
}
void
TemporalBinop::display (const class Printer& printer) const
{
printer.delimiter ('(')++;
myLeft->display (printer);
--printer.delimiter (')');
printer.printRaw (::getOpString (myOp));
printer.delimiter ('(')++;
myRight->display (printer);
--printer.delimiter (')');
}
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