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// This file is part of the AspectC++ compiler 'ac++'.
// Copyright (C) 1999-2003 The 'ac++' developers (see aspectc.org)
//
// This program 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.
//
// This program 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 this program; if not, write to the Free
// Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
// MA 02111-1307 USA
#ifndef __Condition_h__
#define __Condition_h__
#include <set>
#include <iostream>
#include <string>
using namespace std;
#include "Puma/CClassInfo.h"
#include "JoinPointLoc.h"
#include "TransformInfo.h"
#include "Naming.h"
using namespace Puma;
class PointCutExpr;
class AdviceInfo;
class JPL_Class;
typedef pair<CRecord*, string> TypeCheck;
typedef set<TypeCheck> TypeCheckSet;
typedef set<CRecord*> RecordSet;
typedef set<string> StringSet;
// this is the class, which users should apply to manage runtime conditions
// for joinpoints. It is responsible for the memory management.
class Condition {
class Base {
public:
virtual ~Base () {}
virtual void print (ostream&) const = 0;
virtual void gen_check (ostream &, AdviceInfo*, const char*) const = 0;
virtual void checks_for_that (TypeCheckSet &checks) const {}
virtual void checks_for_target (TypeCheckSet &checks) const {}
virtual void names_for_that (StringSet &names) const {}
virtual void names_for_target (StringSet &names) const {}
};
class TypeCond : public Base {
RecordSet _matching;
string _name;
public:
TypeCond (const string &name) : _name (name) {}
virtual ~TypeCond () {}
void matches (CRecord *rec) { _matching.insert (rec); }
const RecordSet &matching () const { return _matching; }
const string &name () const { return _name; }
void type_checks (TypeCheckSet &checks) const {
for (RecordSet::const_iterator iter = _matching.begin ();
iter != _matching.end (); ++iter)
checks.insert (TypeCheck (*iter, _name));
}
};
class That : public TypeCond {
public:
That (const string &name) : TypeCond (name) {}
virtual void print (ostream&) const;
virtual void gen_check (ostream &, AdviceInfo*, const char*) const;
virtual void checks_for_that (TypeCheckSet &checks) const {
type_checks (checks);
}
virtual void names_for_that (StringSet &names) const {
names.insert (name ());
}
};
class Target : public TypeCond {
public:
Target (const string &name) : TypeCond (name) {}
virtual void print (ostream&) const;
virtual void gen_check (ostream &, AdviceInfo*, const char*) const;
virtual void checks_for_target (TypeCheckSet &checks) const {
type_checks (checks);
}
virtual void names_for_target (StringSet &names) const {
names.insert (name ());
}
};
class CFlow : public Base {
int _index;
public:
CFlow (int i) : _index (i) {}
virtual void print (ostream&) const;
virtual void gen_check (ostream &, AdviceInfo*, const char*) const;
};
class Binary : public Base {
protected:
Base *_left;
Base *_right;
public:
Binary (Base *left, Base *right) : _left (left), _right (right) {}
virtual void checks_for_that (TypeCheckSet &result) const {
_left->checks_for_that (result);
_right->checks_for_that (result);
}
virtual void checks_for_target (TypeCheckSet &result) const {
_left->checks_for_target (result);
_right->checks_for_target (result);
}
virtual void names_for_that (StringSet &names) const {
_left->names_for_that (names);
_right->names_for_that (names);
}
virtual void names_for_target (StringSet &names) const {
_left->names_for_that (names);
_right->names_for_that (names);
}
};
class And : public Binary {
public:
And (Base *left, Base *right) : Binary (left, right) {}
virtual void print (ostream&) const;
virtual void gen_check (ostream &, AdviceInfo*, const char*) const;
};
class Or : public Binary {
public:
Or (Base *left, Base *right) : Binary (left, right) {}
virtual void print (ostream&) const;
virtual void gen_check (ostream &, AdviceInfo*, const char*) const;
};
class Not : public Base {
Base *_arg;
public:
Not (Base *arg) : _arg (arg) {}
virtual void print (ostream&) const;
virtual void gen_check (ostream &, AdviceInfo*, const char*) const;
virtual void checks_for_that (TypeCheckSet &result) const {
_arg->checks_for_that (result);
}
virtual void checks_for_target (TypeCheckSet &result) const {
_arg->checks_for_target (result);
}
virtual void names_for_that (StringSet &names) const {
_arg->names_for_that (names);
}
virtual void names_for_target (StringSet &names) const {
_arg->names_for_target (names);
}
};
Base *_cond;
Condition (Base *cond) : _cond (cond) {}
public:
// create an unused condition
Condition () : _cond (0) {}
// delete a condition
~Condition () {
// heap cleanup
if (_cond)
delete _cond;
}
// operator bool returns whether a condition is used
operator bool () const { return _cond != 0; }
// print the condition in a human readable way
void print (ostream &out) {
if (_cond)
_cond->print (out);
else
out << "no condition";
}
void gen_check (ostream &out, AdviceInfo* ai, const char *srcthis) const {
if (_cond)
_cond->gen_check (out, ai, srcthis);
else
out << "true";
}
// return the set of checks needed for 'that' and target
void checks_for_that (TypeCheckSet &result) const {
if (_cond) _cond->checks_for_that (result);
}
void checks_for_target (TypeCheckSet &result) const {
if (_cond) _cond->checks_for_target (result);
}
// return the names of all 'that' and 'target' checks in this condition
void names_for_that (StringSet &names) const {
if (_cond) _cond->names_for_that (names);
}
void names_for_target (StringSet &names) const {
if (_cond) _cond->names_for_target (names);
}
// create a 'that' condition, i.e. the current object is an instance
// of a specific class that matches the argument of 'that'
void that (JPL_Class *in_class, const string &mangled_check) {
TI_Class *ti = (TI_Class*)in_class->transform_info();
stringstream cond_name;
Naming::type_check_func (cond_name, ti->class_info (), mangled_check.c_str ());
_cond = new That (cond_name.str ());
}
// the target object is an instance of a specific class
void target (JPL_Class *in_class, const string &mangled_check) {
TI_Class *ti = (TI_Class*)in_class->transform_info();
stringstream cond_name;
Naming::type_check_func (cond_name, ti->class_info (), mangled_check.c_str ());
_cond = new Target (cond_name.str ());
}
// we are currently running in a control flow from ...
void cflow (int index) {
_cond = new CFlow (index);
}
// assgin a condition
void assign (Condition &other) {
_cond = other._cond;
other._cond = 0;
}
// combine two conditions with &&
void op_and (Condition &other) {
_cond = new And (_cond, other._cond);
other._cond = 0;
}
// combine two conditions with ||
void op_or (Condition &other) {
_cond = new Or (_cond, other._cond);
other._cond = 0;
}
// check if a condition is *not* true
void op_not () {
_cond = new Not (_cond);
}
void matches (const JPL_Class &cls_loc) {
// TODO: matching should work without parser information
CRecord *rec = ((TI_Class*)cls_loc.transform_info ())->class_info ();
// this is a hack! I assume that the top-level node is a TypeCond.
if (_cond)
((TypeCond*)_cond)->matches (rec);
}
};
inline ostream& operator<< (ostream& o, Condition &cond) {
cond.print (o);
return o;
}
#endif // __Condition_h__
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