bool FrQueue::remove(const FrObject *item)
{
FrList *prev = 0 ;
FrList *curr = qhead ;
while (curr && curr->first() != item)
{
prev = curr ;
curr = curr->rest() ;
}
if (curr)
{
if (prev)
prev->replacd(curr->rest()) ;
else
qhead = curr->rest() ;
curr->replaca(0) ;
curr->replacd(0) ;
delete curr ;
qlength-- ;
return true ;
}
else
return false ;
}
void FrQueue::addFront(const FrObject *item, bool do_copy)
{
FrList *newitem = new FrList ;
newitem->replaca((item && do_copy) ? item->deepcopy() : item) ;
newitem->replacd(qhead) ;
if (qhead)
qhead = newitem ;
else
qhead = qtail = newitem ;
qlength++ ;
}
