lemon-main: comparison lemon/bin

equal deleted inserted replaced

-:b18d44ba421a
+:be840e1800b9
-/* -*- C++ -*-
+/* -*- mode: C++; indent-tabs-mode: nil; -*-
 *
-* This file is a part of LEMON, a generic C++ optimization library
+* This file is a part of LEMON, a generic C++ optimization library.
 *
 * Copyright (C) 2003-2008
 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 * (Egervary Research Group on Combinatorial Optimization, EGRES).
 *
 ///default is \c std::less<_Prio>.
 ///
 ///\sa FibHeap
 ///\sa Dijkstra
 template <typename _Prio, typename _ItemIntMap,
-	    typename _Compare = std::less<_Prio> >
+typename _Compare = std::less<_Prio> >
 class BinHeap {
 public:
 ///\e
 typedef _ItemIntMap ItemIntMap;
 /// The constructor.
 /// \param _iim should be given to the constructor, since it is used
 /// internally to handle the cross references. The value of the map
 /// should be PRE_HEAP (-1) for each element.
 explicit BinHeap(ItemIntMap &_iim) : iim(_iim) {}
 /// \brief The constructor.
 ///
 /// The constructor.
 /// \param _iim should be given to the constructor, since it is used
 /// internally to handle the cross references. The value of the map
 /// should be PRE_HEAP (-1) for each element.
 ///
 /// \param _comp The comparator function object.
 BinHeap(ItemIntMap &_iim, const Compare &_comp)
 : iim(_iim), comp(_comp) {}
 /// The number of items stored in the heap.
 ///
 /// \brief Returns the number of items stored in the heap.
 int size() const { return data.size(); }
 /// \brief Checks if the heap stores no items.
 ///
 /// Returns \c true if and only if the heap stores no items.
 bool empty() const { return data.empty(); }
 /// \brief Make empty this heap.
 ///
 /// Make empty this heap. It does not change the cross reference map.
 /// If you want to reuse what is not surely empty you should first clear
 /// the heap and after that you should set the cross reference map for
 /// each item to \c PRE_HEAP.
 void clear() {
 data.clear();
 }
 private:
 static int parent(int i) { return (i-1)/2; }
 }
 int bubble_up(int hole, Pair p) {
 int par = parent(hole);
 while( hole>0 && less(p,data[par]) ) {
-	move(data[par],hole);
+move(data[par],hole);
-	hole = par;
+hole = par;
-	par = parent(hole);
+par = parent(hole);
 }
 move(p, hole);
 return hole;
 }
 int bubble_down(int hole, Pair p, int length) {
 int child = second_child(hole);
 while(child < length) {
-	if( less(data[child-1], data[child]) ) {
+if( less(data[child-1], data[child]) ) {
-	  --child;
+--child;
-	}
+}
-	if( !less(data[child], p) )
+if( !less(data[child], p) )
-	  goto ok;
+goto ok;
-	move(data[child], hole);
+move(data[child], hole);
-	hole = child;
+hole = child;
-	child = second_child(hole);
+child = second_child(hole);
 }
 child--;
 if( child<length && less(data[child], p) ) {
-	move(data[child], hole);
+move(data[child], hole);
-	hole=child;
+hole=child;
 }
 ok:
 move(p, hole);
 return hole;
 }
 data.resize(n+1);
 bubble_up(n, p);
 }
 /// \brief Insert an item into the heap with the given heap.
 ///
 /// Adds \c i to the heap with priority \c p.
 /// \param i The item to insert.
 /// \param p The priority of the item.
 void push(const Item &i, const Prio &p) { push(Pair(i,p)); }
 /// \brief Returns the item with minimum priority relative to \c Compare.
 ///
 /// This method returns the item with minimum priority relative to \c
 /// Compare.
 /// \pre The heap must be nonempty.
 Item top() const {
 return data[0].first;
 }
 /// \brief Returns the minimum priority relative to \c Compare.
 }
 /// \brief Deletes the item with minimum priority relative to \c Compare.
 ///
 /// This method deletes the item with minimum priority relative to \c
 /// Compare from the heap.
 /// \pre The heap must be non-empty.
 void pop() {
 int n = data.size()-1;
 iim.set(data[0].first, POST_HEAP);
 if (n > 0) {
-	bubble_down(0, data[n], n);
+bubble_down(0, data[n], n);
 }
 data.pop_back();
 }
 /// \brief Deletes \c i from the heap.
 void erase(const Item &i) {
 int h = iim[i];
 int n = data.size()-1;
 iim.set(data[h].first, POST_HEAP);
 if( h < n ) {
-	if ( bubble_up(h, data[n]) == h) {
+if ( bubble_up(h, data[n]) == h) {
-	  bubble_down(h, data[n], n);
+bubble_down(h, data[n], n);
-	}
+}
 }
 data.pop_back();
 }
 /// \brief Returns the priority of \c i.
 ///
 /// This function returns the priority of item \c i.
 /// \pre \c i must be in the heap.
 /// \param i The item.
 Prio operator[](const Item &i) const {
 int idx = iim[i];
 return data[idx].second;
 }
 /// \brief \c i gets to the heap with priority \c p independently
 /// if \c i was already there.
 ///
 /// This method calls \ref push(\c i, \c p) if \c i is not stored
 /// in the heap and sets the priority of \c i to \c p otherwise.
 /// \param i The item.
 /// \param p The priority.
 void set(const Item &i, const Prio &p) {
 int idx = iim[i];
 if( idx < 0 ) {
-	push(i,p);
+push(i,p);
 }
 else if( comp(p, data[idx].second) ) {
-	bubble_up(idx, Pair(i,p));
+bubble_up(idx, Pair(i,p));
 }
 else {
-	bubble_down(idx, Pair(i,p), data.size());
+bubble_down(idx, Pair(i,p), data.size());
 }
 }
 /// \brief Decreases the priority of \c i to \c p.
 ///
 /// \param p The priority.
 void decrease(const Item &i, const Prio &p) {
 int idx = iim[i];
 bubble_up(idx, Pair(i,p));
 }
 /// \brief Increases the priority of \c i to \c p.
 ///
 /// This method sets the priority of item \c i to \c p.
 /// \pre \c i must be stored in the heap with priority at most \c
 /// p relative to \c Compare.
 /// \param i The item.
 /// \param p The priority.
 void increase(const Item &i, const Prio &p) {
 int idx = iim[i];
 bubble_down(idx, Pair(i,p), data.size());
 }
 /// \brief Returns if \c item is in, has already been in, or has
 /// never been in the heap.
 ///
 /// This method returns PRE_HEAP if \c item has never been in the
 /// heap, IN_HEAP if it is in the heap at the moment, and POST_HEAP
 /// otherwise. In the latter case it is possible that \c item will
 /// get back to the heap again.
 /// \param i The item.
 State state(const Item &i) const {
 int s = iim[i];
 if( s>=0 )
-	s=0;
+s=0;
 return State(s);
 }
 /// \brief Sets the state of the \c item in the heap.
 ///
 /// Sets the state of the \c item in the heap. It can be used to
 /// manually clear the heap when it is important to achive the
 /// better time complexity.
 /// \param i The item.
 /// \param st The state. It should not be \c IN_HEAP.
 void state(const Item& i, State st) {
 switch (st) {
 case POST_HEAP:
 case PRE_HEAP:
 if (state(i) == IN_HEAP) {
 iim.set(j, idx);
 data[idx].first = j;
 }
 }; // class BinHeap
 } // namespace lemon
 #endif // LEMON_BIN_HEAP_H

changeset 801	e9c203fb003d
parent 157	2ccc1afc2c52
child 440	88ed40ad0d4f