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// Valuation (value distribution for variables) -*- c++ -*-
#ifdef __GNUC__
# pragma implementation
#endif // __GNUC__
#include "Valuation.h"
#include "Value.h"
#include "VariableDefinition.h"
#ifndef NDEBUG
# include "Type.h"
#endif // NDEBUG
/** @file Valuation.C
* Assignment of variables to values
*/
/* Copyright 1999-2001 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. */
Valuation::Valuation () :
myValues (), myError (errNone), myExpr (0), myGlobalMarking (0)
{
}
Valuation::Valuation (const class Valuation& old) :
myValues (), myError (old.myError), myExpr (old.myExpr),
myGlobalMarking (old.myGlobalMarking)
{
for (const_iterator i = old.myValues.begin (); i != old.myValues.end ();
i++) {
assert (i->second != NULL);
myValues[i->first] = i->second->copy ();
}
}
Valuation::~Valuation ()
{
for (iterator i = myValues.begin (); i != myValues.end (); i++)
delete i->second;
}
const class Value*
Valuation::getValue (const class VariableDefinition& var) const
{
const_iterator i = myValues.find (&var);
if (i == myValues.end ())
return NULL;
return i->second;
}
void
Valuation::setValue (const class VariableDefinition& var, class Value& value)
{
assert (var.getType ().isConstrained (value));
Map::value_type p (&var, &value);
std::pair<iterator, bool> status = myValues.insert (p);
if (!status.second) {
delete status.first->second;
myValues.erase (status.first);
status = myValues.insert (p);
assert (status.second);
}
}
bool
Valuation::increment (const class VariableDefinition& var)
{
const_iterator i = myValues.find (&var);
assert (i != myValues.end ());
return i->second->increment ();
}
bool
Valuation::decrement (const class VariableDefinition& var)
{
const_iterator i = myValues.find (&var);
assert (i != myValues.end ());
return i->second->decrement ();
}
bool
Valuation::undefine (const class VariableDefinition& var)
{
iterator i = myValues.find (&var);
if (i == myValues.end ())
return false;
delete i->second;
myValues.erase (i);
return true;
}
const char*
Valuation::msg (enum Error err)
{
switch (err) {
case errNone:
return "noError";
case errConst:
return "constraintViolation";
case errVar:
return "undefinedVariable";
case errUndef:
return "undefinedExpression";
case errFatal:
return "fatalExpression";
case errDiv0:
return "divisionByZero";
case errOver:
return "overflow";
case errMod:
return "modulusError";
case errShift:
return "shiftError";
case errUnion:
return "unionViolation";
case errBuf:
return "bufferViolation";
case errCard:
return "cardinalityOverflow";
case errComp:
return "unificationError";
}
assert (false);
return 0;
}
#include "Printer.h"
#include "Expression.h"
void
Valuation::display (const class Printer& printer,
bool hide) const
{
printer.delimiter ('<')++;
if (myError) {
printer.printRaw (msg (myError));
if (myExpr) {
printer.delimiter (':');
printer++.linebreak ();
myExpr->display (printer);
printer--;
}
}
else
assert (!myExpr);
for (const_iterator i = myValues.begin (); i != myValues.end (); i++) {
if (hide && i->first->isHidden ())
continue;
printer.linebreak ();
printer.print (i->first->getName ());
printer.delimiter (':')++;
i->second->display (printer);
printer--;
}
printer--.linebreak ();
printer.delimiter ('>');
}
void
Valuation::displayEscaped (class StringBuffer& out,
bool hide) const
{
assert (!myError);
class Printer printer;
printer.setOutput (&out);
for (const_iterator v = myValues.begin (); v != myValues.end (); v++) {
if (hide && v->first->isHidden ())
continue;
out.append ('_', 2);
unsigned i = out.getLength ();
out.append (v->first->getName ());
out.escape (i);
out.append ('_', 2);
i = out.getLength ();
v->second->display (printer);
out.escape (i);
}
}
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