/*
* Copy Constructor
*/
Term::Term(Term &term)
{
this->free = term.free;
this->type = term.type;
this->name = new char[strlen(term.name) + 1];
strcpy(this->name, term.getName());
if (this->type == FUNC) {
this->termList = new TermList();
for (int i = 0; i < term.getTermList()->getList()->size(); i++) {
Term *t = new Term(*(term.getTermList()->getList()->at(i)));
this->termList->addTerm(t);
}
}
}
void Formula::copy(TermList *frm, TermList *to)
{
int sz = frm->getList()->size();
for (int i = 0; i < sz; i++) {
Term *t = frm->getList()->at(i);
if (t->getType() == Term::CONS) {
to->addTerm(t);
}
else if (t->getType() == Term::VAR) {
if (t->isFree()) {
to->addTerm(t);
}
else {
Term *x = new Term(*t);
to->addTerm(x);
}
}
else {
TermList *list = new TermList();
this->copy(t->getTermList(), list);
Term *f = new Term(t->getName(), list);
to->addTerm(f);
}
}
}
bool Term::operator ==(Term &term)
{
if (this->type != term.type || strcmp(this->name, term.getName())) return false;
if (this->type == FUNC) {
return *(this->termList) == *(term.getTermList());
}
else {
return true;
}
}
void TermList::getFreeVarList(TermList *list)
{
int sz = this->list->size();
for (int i = 0; i < sz; i++) {
Term *t = this->list->at(i);
if (t->getType() == Term::VAR && t->isFree()) {
list->addTerm(t);
}
else if (t->getType() == Term::FUNC) {
t->getTermList()->getFreeVarList(list);
}
}
}
bool Prover::occursIn(Term *t, TermList *list)
{
for (int i = 0; i < list->getList()->size(); i++) {
Term *p = list->getList()->at(i);
if (*t == *p) {
return true;
}
else if ((p->getType() == Term::FUNC) && this->occursIn(t, p->getTermList())) {
return true;
}
}
return false;
}
void TermList::replace(Term *oldV, Term *newV)
{
int sz = this->list->size();
for (int i = 0; i < sz; i++) {
Term *t = this->list->at(i);
if (*t == *oldV) {
this->list->at(i) = newV;
//delete t; //TO DO
}
else if (t->getType() == Term::FUNC) {
t->getTermList()->replace(oldV, newV);
}
}
}
