--- /dev/null
+// -*- C++ -*-
+
+// Copyright (C) 2005, 2006, 2009 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the terms
+// of the GNU General Public License as published by the Free Software
+// Foundation; either version 3, or (at your option) any later
+// version.
+
+// This library is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// General Public License for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
+
+// Permission to use, copy, modify, sell, and distribute this software
+// is hereby granted without fee, provided that the above copyright
+// notice appears in all copies, and that both that copyright notice
+// and this permission notice appear in supporting documentation. None
+// of the above authors, nor IBM Haifa Research Laboratories, make any
+// representation about the suitability of this software for any
+// purpose. It is provided "as is" without express or implied
+// warranty.
+
+/**
+ * @file trie_policy/prefix_search_node_update_imp.hpp
+ * Contains an implementation of prefix_search_node_update.
+ */
+
+PB_DS_CLASS_T_DEC
+std::pair<
+ typename PB_DS_CLASS_C_DEC::const_iterator,
+ typename PB_DS_CLASS_C_DEC::const_iterator>
+PB_DS_CLASS_C_DEC::
+prefix_range(key_const_reference r_key) const
+{
+ const access_traits& r_traits = get_access_traits();
+ return (prefix_range(r_traits.begin(r_key), r_traits.end(r_key)));
+}
+
+PB_DS_CLASS_T_DEC
+std::pair<
+ typename PB_DS_CLASS_C_DEC::iterator,
+ typename PB_DS_CLASS_C_DEC::iterator>
+PB_DS_CLASS_C_DEC::
+prefix_range(key_const_reference r_key)
+{
+ return (prefix_range(get_access_traits().begin(r_key),
+ get_access_traits().end(r_key)));
+}
+
+PB_DS_CLASS_T_DEC
+std::pair<
+ typename PB_DS_CLASS_C_DEC::const_iterator,
+ typename PB_DS_CLASS_C_DEC::const_iterator>
+PB_DS_CLASS_C_DEC::
+prefix_range(typename access_traits::const_iterator b,
+ typename access_traits::const_iterator e) const
+{
+ const std::pair<iterator, iterator> non_const_ret =
+ const_cast<PB_DS_CLASS_C_DEC* >(this)->prefix_range(b, e);
+
+ return (std::make_pair(const_iterator(non_const_ret.first),
+ const_iterator(non_const_ret.second)));
+}
+
+PB_DS_CLASS_T_DEC
+std::pair<
+ typename PB_DS_CLASS_C_DEC::iterator,
+ typename PB_DS_CLASS_C_DEC::iterator>
+PB_DS_CLASS_C_DEC::
+prefix_range(typename access_traits::const_iterator b,
+ typename access_traits::const_iterator e)
+{
+ Node_Itr nd_it = node_begin();
+ Node_Itr end_nd_it = node_end();
+
+ const access_traits& r_traits = get_access_traits();
+ const size_type given_range_length = std::distance(b, e);
+
+ while (true)
+ {
+ if (nd_it == end_nd_it)
+ return (std::make_pair(end(), end()));
+
+ const size_type common_range_length =
+ base_type::common_prefix_len(nd_it, b, e, r_traits);
+
+ if (common_range_length >= given_range_length)
+ {
+ iterator ret_b = this->leftmost_it(nd_it);
+ iterator ret_e = this->rightmost_it(nd_it);
+ return (std::make_pair(ret_b, ++ret_e));
+ }
+ nd_it = next_child(nd_it, b, e, end_nd_it, r_traits);
+ }
+}
+
+PB_DS_CLASS_T_DEC
+typename PB_DS_CLASS_C_DEC::node_iterator
+PB_DS_CLASS_C_DEC::
+next_child(node_iterator nd_it, typename access_traits::const_iterator b,
+ typename access_traits::const_iterator e, node_iterator end_nd_it,
+ const access_traits& r_traits)
+{
+ const size_type num_children = nd_it.num_children();
+ node_iterator ret = end_nd_it;
+ size_type max_length = 0;
+ for (size_type i = 0; i < num_children; ++i)
+ {
+ node_iterator pot = nd_it.get_child(i);
+ const size_type common_range_length =
+ base_type::common_prefix_len(pot, b, e, r_traits);
+
+ if (common_range_length > max_length)
+ {
+ ret = pot;
+ max_length = common_range_length;
+ }
+ }
+ return (ret);
+}
+
+PB_DS_CLASS_T_DEC
+inline void
+PB_DS_CLASS_C_DEC::
+operator()(node_iterator /*nd_it*/, node_const_iterator /*end_nd_it*/) const
+{ }
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