--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ossrv_pub/boost_apis/boost/pending/mutable_queue.hpp Tue Feb 02 02:01:42 2010 +0200
@@ -0,0 +1,135 @@
+//
+//=======================================================================
+// Copyright 1997, 1998, 1999, 2000 University of Notre Dame.
+// Authors: Andrew Lumsdaine, Lie-Quan Lee, Jeremy G. Siek
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//=======================================================================
+//
+#ifndef BOOST_MUTABLE_QUEUE_HPP
+#define BOOST_MUTABLE_QUEUE_HPP
+
+#include <vector>
+#include <algorithm>
+#include <functional>
+#include <boost/property_map.hpp>
+#include <boost/pending/mutable_heap.hpp>
+#include <boost/pending/is_heap.hpp>
+#include <boost/graph/detail/array_binary_tree.hpp>
+#include <iterator>
+
+namespace boost {
+
+ // The mutable queue whose elements are indexed
+ //
+ // This adaptor provides a special kind of priority queue that has
+ // and update operation. This allows the ordering of the items to
+ // change. After the ordering criteria for item x changes, one must
+ // call the Q.update(x)
+ //
+ // In order to efficiently find x in the queue, a functor must be
+ // provided to map value_type to a unique ID, which the
+ // mutable_queue will then use to map to the location of the
+ // item. The ID's generated must be between 0 and N, where N is the
+ // value passed to the constructor of mutable_queue
+
+ template <class IndexedType,
+ class RandomAccessContainer = std::vector<IndexedType>,
+ class Comp = std::less<typename RandomAccessContainer::value_type>,
+ class ID = identity_property_map >
+ class mutable_queue {
+ public:
+ typedef IndexedType value_type;
+ typedef typename RandomAccessContainer::size_type size_type;
+ protected:
+ typedef typename RandomAccessContainer::iterator iterator;
+#if !defined BOOST_NO_STD_ITERATOR_TRAITS
+ typedef adstl::array_binary_tree_node<iterator, ID> Node;
+#else
+ typedef adstl::array_binary_tree_node<iterator, value_type, ID> Node;
+#endif
+ typedef adstl::compare_array_node<RandomAccessContainer,Comp> Compare;
+ typedef std::vector<size_type> IndexArray;
+ public:
+ typedef Compare value_compare;
+ typedef ID id_generator;
+
+ mutable_queue(size_type n, const Comp& x, const ID& _id)
+ : index_array(n), comp(x), id(_id) {
+ c.reserve(n);
+ }
+ template <class ForwardIterator>
+ mutable_queue(ForwardIterator first, ForwardIterator last,
+ const Comp& x, const ID& _id)
+ : index_array(std::distance(first, last)), comp(x), id(_id)
+ {
+ while( first != last ) {
+ push(*first);
+ ++first;
+ }
+ }
+
+ bool empty() const { return c.empty(); }
+
+ void pop() {
+ value_type tmp = c.back();
+ c.back() = c.front();
+ c.front() = tmp;
+
+ size_type id_f = get(id, c.back());
+ size_type id_b = get(id, tmp);
+ size_type i = index_array[ id_b ];
+ index_array[ id_b ] = index_array[ id_f ];
+ index_array[ id_f ] = i;
+
+ c.pop_back();
+ Node node(c.begin(), c.end(), c.begin(), id);
+ down_heap(node, comp, index_array);
+ }
+ void push(const IndexedType& x) {
+ c.push_back(x);
+ /*set index-array*/
+ index_array[ get(id, x) ] = c.size()-1;
+ Node node(c.begin(), c.end(), c.end() - 1, id);
+ up_heap(node, comp, index_array);
+ }
+
+ void update(const IndexedType& x) {
+ size_type current_pos = index_array[ get(id, x) ];
+ c[current_pos] = x;
+
+ Node node(c.begin(), c.end(), c.begin()+current_pos, id);
+ update_heap(node, comp, index_array);
+ }
+
+ value_type& front() { return c.front(); }
+ value_type& top() { return c.front(); }
+
+ const value_type& front() const { return c.front(); }
+ const value_type& top() const { return c.front(); }
+
+ size_type size() const { return c.size(); }
+
+ void clear() { c.clear(); }
+
+#if 0
+ // dwa 2003/7/11 - I don't know what compiler is supposed to
+ // be able to compile this, but is_heap is not standard!!
+ bool test() {
+ return std::is_heap(c.begin(), c.end(), Comp());
+ }
+#endif
+
+ protected:
+ IndexArray index_array;
+ Compare comp;
+ RandomAccessContainer c;
+ ID id;
+ };
+
+
+}
+
+#endif // BOOST_MUTABLE_QUEUE_HPP