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// Maria structure assignment class -*- c++ -*-
#include "snprintf.h"
#ifdef __GNUC__
# pragma implementation
#endif // __GNUC__
#include "StructAssign.h"
#include "StructType.h"
#include "StructValue.h"
#include "Printer.h"
/** @file StructAssign.C
* Structure component assignment operation
*/
/* Copyright 2001-2002 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. */
StructAssign::StructAssign (class Expression& structure,
card_t i,
class Expression& expr) :
Expression (),
myStructure (structure), myIndex (i), myExpr (expr)
{
assert (myStructure.getType () &&
myStructure.getType ()->getKind () == Type::tStruct);
assert (myStructure.isBasic () && myExpr.isBasic ());
assert (i < static_cast<const class StructType*>
(myStructure.getType ())->getSize ());
setType (*structure.getType ());
}
StructAssign::~StructAssign ()
{
myStructure.destroy ();
myExpr.destroy ();
}
class Value*
StructAssign::do_eval (const class Valuation& valuation) const
{
class Value* v = myStructure.eval (valuation);
if (!v)
return NULL;
assert (v->getKind () == Value::vStruct);
class Value*& w = static_cast<class StructValue&>(*v)[myIndex];
delete w;
if (!(w = myExpr.eval (valuation))) {
delete v;
return NULL;
}
return constrain (valuation, v);
}
class Expression*
StructAssign::ground (const class Valuation& valuation,
class Transition* transition,
bool declare)
{
class Expression* structure =
myStructure.ground (valuation, transition, declare);
if (!structure)
return NULL;
assert (valuation.isOK ());
class Expression* expr = myExpr.ground (valuation, transition, declare);
if (!expr) {
structure->destroy ();
return NULL;
}
if (structure == &myStructure && expr == &myExpr) {
structure->destroy (), expr->destroy ();
return copy ();
}
else
return static_cast<class Expression*>
(new class StructAssign
(*structure, myIndex, *expr))->ground (valuation);
}
class Expression*
StructAssign::substitute (class Substitution& substitution)
{
class Expression* structure = myStructure.substitute (substitution);
class Expression* expr = myExpr.substitute (substitution);
if (structure == &myStructure && expr == &myExpr) {
structure->destroy (), expr->destroy ();
return copy ();
}
else
return (new class StructAssign (*structure, myIndex, *expr))->cse ();
}
bool
StructAssign::depends (const class VariableSet& vars,
bool complement) const
{
return
myStructure.depends (vars, complement) ||
myExpr.depends (vars, complement);
}
bool
StructAssign::forExpressions (bool (*operation)
(const class Expression&,void*),
void* data) const
{
return
(*operation) (*this, data) &&
myStructure.forExpressions (operation, data) &&
myExpr.forExpressions (operation, data);
}
#ifdef EXPR_COMPILE
# include "CExpression.h"
# include <stdio.h>
# include <string.h>
void
StructAssign::compile (class CExpression& cexpr,
unsigned indent,
const char* lvalue,
const class VariableSet* vars) const
{
size_t len = strlen (lvalue);
char* rvalue = new char[len + 23];
memcpy (rvalue, lvalue, len);
snprintf (rvalue + len, 23, "[%u]", myIndex);
myStructure.compile (cexpr, indent, lvalue, vars);
myExpr.compile (cexpr, indent, rvalue, vars);
delete[] rvalue;
compileConstraint (cexpr, indent, lvalue);
}
#endif // EXPR_COMPILE
void
StructAssign::display (const class Printer& printer) const
{
myStructure.display (printer);
printer.delimiter ('.');
printer.delimiter ('{')++;
printer.print (static_cast<const class StructType*>(myStructure.getType ())
->getComponentName (myIndex));
printer.delimiter (' ');
myExpr.display (printer);
--printer.delimiter ('}');
}
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