bool PriorityQueue<Data, Compare, Alloc>::private_move_down_node(Data* ptr)
{
bool ret = false;
int child = ptr->qIdx * 2 + 1;
child += (child+1 < used_ &&
comp_(*dataQue_[child+1], *dataQue_[child]));
while ( child < used_ && comp_(*dataQue_[child], *ptr) )
{
dataQue_[child]->qIdx = ptr->qIdx;
std::swap(dataQue_[child], dataQue_[ptr->qIdx]);
ptr->qIdx = child;
child = child * 2 + 1;
child += (child+1 < used_ && comp_(*dataQue_[child+1], *dataQue_[child]));
ret = true;
}
return ret;
}
static void ia(int *l)
{
int i;
int r;
i = 0;
r = r_line(l);
comp_(l, r, i);
}
//! remove the highest data
inline T * pop() throw()
{
assert(size_>0);
//------------------------------------------------------------------
// promote the last element by replacing the top element
//------------------------------------------------------------------
T *ans = data_[0];
data_[0] = data_[ --size_ ];
//------------------------------------------------------------------
// reorganize the heap from the top
//------------------------------------------------------------------
size_t ipos = 0;
while( true )
{
const size_t lpos = at_left( ipos );
const size_t rpos = at_right( ipos );
size_t mpos = ipos;
//--------------------------------------------------------------
//-- test left
//--------------------------------------------------------------
if( lpos < size_ && comp_( *data_[ipos], *data_[lpos] ) < 0 )
mpos = lpos;
//--------------------------------------------------------------
//-- test right
//--------------------------------------------------------------
if( rpos < size_ && comp_( *data_[mpos], *data_[rpos] ) < 0 )
mpos = rpos;
//--------------------------------------------------------------
//-- are we done ?
//--------------------------------------------------------------
if( mpos == ipos )
break;
//--------------------------------------------------------------
//-- update heap
//--------------------------------------------------------------
cswap<slot_t>( data_[ipos], data_[mpos] );
ipos = mpos;
}
return ans;
}
void Push(const T & value)
{
if (heap_.Size() < capacity_)
{
heap_.Push(value);
}
else if (comp_(value, heap_.Top()))
{
heap_.Pop();
heap_.Push(value);
}
}
void push(const T& v) {
if (data_.size() < max_size_) {
data_.push_back(v);
if (data_.size() == max_size_) {
std::make_heap(data_.begin(), data_.end(), comp_);
}
} else {
if (max_size_ > 0 && comp_(v, data_.front())) {
std::pop_heap(data_.begin(), data_.end(), comp_);
data_.back() = v;
std::push_heap(data_.begin(), data_.end(), comp_);
}
}
}
bool PriorityQueue<Data, Compare, Alloc>::private_move_up_node(Data* ptr)
{
bool ret = false;
int parent = (ptr->qIdx - 1) / 2;
while ( parent >= 0 && comp_(*ptr, *dataQue_[parent]) )
{
dataQue_[parent]->qIdx = ptr->qIdx;
std::swap(dataQue_[parent], dataQue_[ptr->qIdx]);
ptr->qIdx = parent;
parent = (ptr->qIdx - 1) / 2;
ret = true;
}
return ret;
}
//! insert the address, no memory check
inline void __push( T *pObj ) throw()
{
assert( size_ < maxi_ );
//------------------------------------------------------------------
//-- put it at the end
//------------------------------------------------------------------
size_t ipos = size_;
size_t ppos = parent( ipos );
data_[ size_++ ] = (mutable_type *)pObj;
//------------------------------------------------------------------
//-- organize heap
//------------------------------------------------------------------
while( ipos > 0 && comp_( *data_[ppos], *data_[ipos] ) < 0 )
{
cswap<slot_t>( data_[ppos], data_[ipos] );
ipos = ppos;
ppos = parent( ipos );
}
}
bool operator() (const T & left, const T & right) const
{
return comp_(right, left);
}
