Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 1 | /* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */ |
| 2 | /* |
| 3 | * Copyright (c) 2011 University of California, Los Angeles |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License version 2 as |
| 7 | * published by the Free Software Foundation; |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 17 | * |
| 18 | * Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu> |
| 19 | */ |
| 20 | |
Alexander Afanasyev | 9a98970 | 2012-06-29 17:44:00 -0700 | [diff] [blame] | 21 | #ifndef TRIE_H_ |
| 22 | #define TRIE_H_ |
| 23 | |
| 24 | #include "ns3/ptr.h" |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 25 | |
| 26 | #include <boost/intrusive/unordered_set.hpp> |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 27 | #include <boost/intrusive/list.hpp> |
Alexander Afanasyev | 9a98970 | 2012-06-29 17:44:00 -0700 | [diff] [blame] | 28 | #include <boost/intrusive/set.hpp> |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 29 | #include <boost/functional/hash.hpp> |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 30 | #include <boost/interprocess/smart_ptr/unique_ptr.hpp> |
| 31 | #include <boost/tuple/tuple.hpp> |
Alexander Afanasyev | 78057c3 | 2012-07-06 15:18:46 -0700 | [diff] [blame^] | 32 | #include <boost/foreach.hpp> |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 33 | |
Alexander Afanasyev | 30cb117 | 2012-07-06 10:47:39 -0700 | [diff] [blame] | 34 | namespace ndnSIM |
| 35 | { |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 36 | |
| 37 | ///////////////////////////////////////////////////// |
| 38 | // Allow customization for payload |
| 39 | // |
| 40 | template<typename Payload> |
| 41 | struct pointer_payload_traits |
| 42 | { |
Alexander Afanasyev | 9e96e36 | 2012-07-02 23:04:39 -0700 | [diff] [blame] | 43 | typedef Payload payload_type; |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 44 | typedef Payload* pointer_type; |
| 45 | typedef const Payload* const_pointer_type; |
| 46 | |
Alexander Afanasyev | 78057c3 | 2012-07-06 15:18:46 -0700 | [diff] [blame^] | 47 | static Payload* empty_payload; |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 48 | }; |
| 49 | |
| 50 | template<typename Payload> |
Alexander Afanasyev | 78057c3 | 2012-07-06 15:18:46 -0700 | [diff] [blame^] | 51 | Payload* |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 52 | pointer_payload_traits<Payload>::empty_payload = 0; |
| 53 | |
| 54 | template<typename Payload> |
| 55 | struct smart_pointer_payload_traits |
| 56 | { |
Alexander Afanasyev | 9e96e36 | 2012-07-02 23:04:39 -0700 | [diff] [blame] | 57 | typedef Payload payload_type; |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 58 | typedef ns3::Ptr<Payload> pointer_type; |
| 59 | typedef ns3::Ptr<const Payload> const_pointer_type; |
| 60 | |
Alexander Afanasyev | 78057c3 | 2012-07-06 15:18:46 -0700 | [diff] [blame^] | 61 | static ns3::Ptr<Payload> empty_payload; |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 62 | }; |
| 63 | |
| 64 | template<typename Payload> |
Alexander Afanasyev | 78057c3 | 2012-07-06 15:18:46 -0700 | [diff] [blame^] | 65 | ns3::Ptr<Payload> |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 66 | smart_pointer_payload_traits<Payload>::empty_payload = 0; |
| 67 | |
| 68 | |
| 69 | //////////////////////////////////////////////////// |
| 70 | // forward declarations |
| 71 | // |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 72 | template<typename FullKey, |
| 73 | typename Payload, |
Alexander Afanasyev | 9a98970 | 2012-06-29 17:44:00 -0700 | [diff] [blame] | 74 | typename PayloadTraits, |
| 75 | typename PolicyHook > |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 76 | class trie; |
| 77 | |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 78 | template<typename FullKey, typename Payload, typename PayloadTraits, typename PolicyHook> |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 79 | inline std::ostream& |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 80 | operator << (std::ostream &os, |
| 81 | const trie<FullKey, Payload, PayloadTraits, PolicyHook> &trie_node); |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 82 | |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 83 | template<typename FullKey, typename Payload, typename PayloadTraits, typename PolicyHook> |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 84 | bool |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 85 | operator== (const trie<FullKey, Payload, PayloadTraits, PolicyHook> &a, |
| 86 | const trie<FullKey, Payload, PayloadTraits, PolicyHook> &b); |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 87 | |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 88 | template<typename FullKey, typename Payload, typename PayloadTraits, typename PolicyHook > |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 89 | std::size_t |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 90 | hash_value (const trie<FullKey, Payload, PayloadTraits, PolicyHook> &trie_node); |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 91 | |
| 92 | /////////////////////////////////////////////////// |
| 93 | // actual definition |
| 94 | // |
| 95 | |
| 96 | |
| 97 | template<typename FullKey, |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 98 | typename Payload, typename PayloadTraits, |
| 99 | typename PolicyHook > |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 100 | class trie |
| 101 | { |
| 102 | public: |
| 103 | typedef typename FullKey::partial_type Key; |
| 104 | |
| 105 | typedef trie* iterator; |
| 106 | typedef const trie* const_iterator; |
| 107 | |
| 108 | inline |
| 109 | trie (const Key &key, size_t bucketSize = 10, size_t bucketIncrement = 10); |
| 110 | |
| 111 | inline |
| 112 | ~trie (); |
Alexander Afanasyev | 78057c3 | 2012-07-06 15:18:46 -0700 | [diff] [blame^] | 113 | |
| 114 | void |
| 115 | clear () |
| 116 | { |
| 117 | children_.clear_and_dispose (trie_delete_disposer ()); |
| 118 | } |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 119 | |
| 120 | // actual entry |
| 121 | friend bool |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 122 | operator== <> (const trie<FullKey, Payload, PayloadTraits, PolicyHook> &a, |
| 123 | const trie<FullKey, Payload, PayloadTraits, PolicyHook> &b); |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 124 | |
| 125 | friend std::size_t |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 126 | hash_value <> (const trie<FullKey, Payload, PayloadTraits, PolicyHook> &trie_node); |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 127 | |
| 128 | inline std::pair<iterator, bool> |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 129 | insert (const FullKey &key, |
Alexander Afanasyev | 78057c3 | 2012-07-06 15:18:46 -0700 | [diff] [blame^] | 130 | typename PayloadTraits::pointer_type payload); |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 131 | |
| 132 | /** |
| 133 | * @brief Removes payload (if it exists) and if there are no children, prunes parents trie |
| 134 | */ |
| 135 | inline void |
| 136 | erase (); |
| 137 | |
| 138 | /** |
| 139 | * @brief Do exactly as erase, but without erasing the payload |
| 140 | */ |
| 141 | inline void |
| 142 | prune (); |
| 143 | |
Alexander Afanasyev | 78057c3 | 2012-07-06 15:18:46 -0700 | [diff] [blame^] | 144 | inline boost::tuple<const iterator, bool, const iterator> |
| 145 | find (const FullKey &key) const |
| 146 | { |
| 147 | return const_cast<trie*> (this)->find (key); |
| 148 | } |
| 149 | |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 150 | /** |
| 151 | * @brief Perform the longest prefix match |
| 152 | * @param key the key for which to perform the longest prefix match |
| 153 | * |
| 154 | * @return ->second is true if prefix in ->first is longer than key |
| 155 | */ |
| 156 | inline boost::tuple<iterator, bool, iterator> |
| 157 | find (const FullKey &key); |
| 158 | |
| 159 | /** |
| 160 | * @brief Find next payload of the sub-trie |
| 161 | * @returns end() or a valid iterator pointing to the trie leaf (order is not defined, enumeration ) |
| 162 | */ |
| 163 | inline iterator |
| 164 | find (); |
| 165 | |
| 166 | /** |
| 167 | * @brief Find next payload of the sub-trie satisfying the predicate |
| 168 | * @param pred predicate |
| 169 | * @returns end() or a valid iterator pointing to the trie leaf (order is not defined, enumeration ) |
| 170 | */ |
| 171 | template<class Predicate> |
| 172 | inline iterator |
| 173 | find_if (Predicate pred); |
| 174 | |
| 175 | iterator end () |
| 176 | { |
| 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | const_iterator end () const |
| 181 | { |
| 182 | return 0; |
| 183 | } |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 184 | |
| 185 | typename PayloadTraits::const_pointer_type |
| 186 | payload () const |
| 187 | { |
| 188 | return payload_; |
| 189 | } |
| 190 | |
Alexander Afanasyev | 78057c3 | 2012-07-06 15:18:46 -0700 | [diff] [blame^] | 191 | typename PayloadTraits::pointer_type |
| 192 | payload () |
| 193 | { |
| 194 | return payload_; |
| 195 | } |
| 196 | |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 197 | void |
Alexander Afanasyev | 78057c3 | 2012-07-06 15:18:46 -0700 | [diff] [blame^] | 198 | set_payload (typename PayloadTraits::pointer_type payload) |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 199 | { |
| 200 | payload_ = payload; |
| 201 | } |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 202 | |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 203 | inline void |
| 204 | PrintStat (std::ostream &os) const; |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 205 | |
| 206 | private: |
| 207 | //The disposer object function |
| 208 | struct trie_delete_disposer |
| 209 | { |
| 210 | void operator() (trie *delete_this) |
| 211 | { |
| 212 | // std::cout << "Deleting " << delete_this << "\n"; |
| 213 | delete delete_this; |
| 214 | } |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 215 | }; |
| 216 | |
| 217 | template<class D> |
| 218 | struct array_disposer |
| 219 | { |
| 220 | void operator() (D *array) |
| 221 | { |
| 222 | delete [] array; |
| 223 | } |
| 224 | }; |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 225 | |
| 226 | friend |
| 227 | std::ostream& |
| 228 | operator<< < > (std::ostream &os, const trie &trie_node); |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 229 | |
| 230 | public: |
| 231 | PolicyHook policy_hook_; |
| 232 | |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 233 | private: |
Alexander Afanasyev | 30cb117 | 2012-07-06 10:47:39 -0700 | [diff] [blame] | 234 | boost::intrusive::unordered_set_member_hook<> unordered_set_member_hook_; |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 235 | |
| 236 | // necessary typedefs |
| 237 | typedef trie self_type; |
Alexander Afanasyev | 30cb117 | 2012-07-06 10:47:39 -0700 | [diff] [blame] | 238 | typedef boost::intrusive::member_hook< trie, |
| 239 | boost::intrusive::unordered_set_member_hook< >, |
| 240 | &trie::unordered_set_member_hook_ > member_hook; |
| 241 | typedef boost::intrusive::unordered_set< trie, member_hook > unordered_set; |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 242 | typedef typename unordered_set::bucket_type bucket_type; |
| 243 | typedef typename unordered_set::bucket_traits bucket_traits; |
| 244 | |
| 245 | //////////////////////////////////////////////// |
| 246 | // Actual data |
| 247 | //////////////////////////////////////////////// |
| 248 | |
| 249 | Key key_; ///< name component |
| 250 | |
| 251 | size_t initialBucketSize_; |
| 252 | size_t bucketIncrement_; |
| 253 | |
| 254 | size_t bucketSize_; |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 255 | typedef boost::interprocess::unique_ptr< bucket_type, array_disposer<bucket_type> > buckets_array; |
| 256 | buckets_array buckets_; |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 257 | unordered_set children_; |
| 258 | |
Alexander Afanasyev | 78057c3 | 2012-07-06 15:18:46 -0700 | [diff] [blame^] | 259 | typename PayloadTraits::pointer_type payload_; |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 260 | trie *parent_; // to make cleaning effective |
| 261 | }; |
| 262 | |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 263 | template<typename FullKey, typename Payload, typename PayloadTraits, typename PolicyHook> |
| 264 | trie<FullKey, Payload, PayloadTraits, PolicyHook> |
| 265 | ::trie (const trie::Key &key, size_t bucketSize, size_t bucketIncrement) |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 266 | : key_ (key) |
| 267 | , initialBucketSize_ (bucketSize) |
| 268 | , bucketIncrement_ (bucketIncrement) |
| 269 | , bucketSize_ (initialBucketSize_) |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 270 | , buckets_ (new bucket_type [bucketSize_]) //cannot use normal pointer, because lifetime of buckets should be larger than lifetime of the container |
| 271 | , children_ (bucket_traits (buckets_.get (), bucketSize_)) |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 272 | , payload_ (PayloadTraits::empty_payload) |
| 273 | , parent_ (0) |
| 274 | { |
| 275 | } |
| 276 | |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 277 | template<typename FullKey, typename Payload, typename PayloadTraits, typename PolicyHook> |
| 278 | trie<FullKey, Payload, PayloadTraits, PolicyHook> |
| 279 | ::~trie () |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 280 | { |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 281 | payload_ = PayloadTraits::empty_payload; // necessary for smart pointers... |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 282 | children_.clear_and_dispose (trie_delete_disposer ()); |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 283 | } |
| 284 | |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 285 | template<typename FullKey, typename Payload, typename PayloadTraits, typename PolicyHook> |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 286 | inline |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 287 | std::pair<typename trie<FullKey, Payload, PayloadTraits, PolicyHook>::iterator, bool> |
| 288 | trie<FullKey, Payload, PayloadTraits, PolicyHook> |
Alexander Afanasyev | 78057c3 | 2012-07-06 15:18:46 -0700 | [diff] [blame^] | 289 | ::insert (const FullKey &key, typename PayloadTraits::pointer_type payload) |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 290 | { |
| 291 | trie *trieNode = this; |
| 292 | |
| 293 | BOOST_FOREACH (const Key &subkey, key) |
| 294 | { |
| 295 | typename unordered_set::iterator item = trieNode->children_.find (subkey); |
| 296 | if (item == trieNode->children_.end ()) |
| 297 | { |
| 298 | trie *newNode = new trie (subkey, initialBucketSize_, bucketIncrement_); |
| 299 | // std::cout << "new " << newNode << "\n"; |
| 300 | newNode->parent_ = trieNode; |
| 301 | |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 302 | if (trieNode->children_.size () >= trieNode->bucketSize_) |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 303 | { |
| 304 | trieNode->bucketSize_ += trieNode->bucketIncrement_; |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 305 | buckets_array newBuckets (new bucket_type [trieNode->bucketSize_]); |
| 306 | trieNode->children_.rehash (bucket_traits (newBuckets.get (), trieNode->bucketSize_)); |
| 307 | trieNode->buckets_.swap (newBuckets); |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 308 | } |
| 309 | |
| 310 | std::pair< typename unordered_set::iterator, bool > ret = |
| 311 | trieNode->children_.insert (*newNode); |
| 312 | |
| 313 | trieNode = &(*ret.first); |
| 314 | } |
| 315 | else |
| 316 | trieNode = &(*item); |
| 317 | } |
| 318 | |
| 319 | if (trieNode->payload_ == 0) |
| 320 | { |
| 321 | trieNode->payload_ = payload; |
| 322 | return std::make_pair (trieNode, true); |
| 323 | } |
| 324 | else |
| 325 | return std::make_pair (trieNode, false); |
| 326 | } |
| 327 | |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 328 | template<typename FullKey, typename Payload, typename PayloadTraits, typename PolicyHook> |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 329 | inline |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 330 | boost::tuple<typename trie<FullKey, Payload, PayloadTraits, PolicyHook>::iterator, |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 331 | bool, |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 332 | typename trie<FullKey, Payload, PayloadTraits, PolicyHook>::iterator> |
| 333 | trie<FullKey, Payload, PayloadTraits, PolicyHook> |
| 334 | ::find (const FullKey &key) |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 335 | { |
| 336 | trie *trieNode = this; |
| 337 | iterator foundNode = (payload_ != PayloadTraits::empty_payload) ? this : 0; |
| 338 | bool reachLast = true; |
| 339 | |
| 340 | BOOST_FOREACH (const Key &subkey, key) |
| 341 | { |
| 342 | typename unordered_set::iterator item = trieNode->children_.find (subkey); |
| 343 | if (item == trieNode->children_.end ()) |
| 344 | { |
| 345 | reachLast = false; |
| 346 | break; |
| 347 | } |
| 348 | else |
| 349 | { |
| 350 | trieNode = &(*item); |
| 351 | |
| 352 | if (trieNode->payload_ != PayloadTraits::empty_payload) |
| 353 | foundNode = trieNode; |
| 354 | } |
| 355 | } |
| 356 | |
| 357 | return boost::make_tuple (foundNode, reachLast, trieNode); |
| 358 | } |
| 359 | |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 360 | template<typename FullKey, typename Payload, typename PayloadTraits, typename PolicyHook> |
| 361 | inline typename trie<FullKey, Payload, PayloadTraits, PolicyHook>::iterator |
| 362 | trie<FullKey, Payload, PayloadTraits, PolicyHook> |
| 363 | ::find () |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 364 | { |
| 365 | if (payload_ != PayloadTraits::empty_payload) |
| 366 | return this; |
| 367 | |
Alexander Afanasyev | 9a98970 | 2012-06-29 17:44:00 -0700 | [diff] [blame] | 368 | typedef trie<FullKey, Payload, PayloadTraits, PolicyHook> trie; |
Alexander Afanasyev | 051d378 | 2012-07-03 10:10:15 -0700 | [diff] [blame] | 369 | for (typename trie::unordered_set::iterator subnode = children_.begin (); |
| 370 | subnode != children_.end (); |
| 371 | subnode++ ) |
| 372 | // BOOST_FOREACH (trie &subnode, children_) |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 373 | { |
Alexander Afanasyev | 051d378 | 2012-07-03 10:10:15 -0700 | [diff] [blame] | 374 | iterator value = subnode->find (); |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 375 | if (value != 0) |
| 376 | return value; |
| 377 | } |
| 378 | |
| 379 | return 0; |
| 380 | } |
| 381 | |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 382 | template<typename FullKey, typename Payload, typename PayloadTraits, typename PolicyHook> |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 383 | template<class Predicate> |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 384 | inline typename trie<FullKey, Payload, PayloadTraits, PolicyHook>::iterator |
| 385 | trie<FullKey, Payload, PayloadTraits, PolicyHook> |
| 386 | ::find_if (Predicate pred) |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 387 | { |
| 388 | if (payload_ != PayloadTraits::empty_payload && pred (payload_)) |
| 389 | return this; |
| 390 | |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 391 | typedef trie<FullKey, Payload, PayloadTraits, PolicyHook> trie; |
Alexander Afanasyev | 051d378 | 2012-07-03 10:10:15 -0700 | [diff] [blame] | 392 | for (typename trie::unordered_set::iterator subnode = children_.begin (); |
| 393 | subnode != children_.end (); |
| 394 | subnode++ ) |
| 395 | // BOOST_FOREACH (const trie &subnode, children_) |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 396 | { |
Alexander Afanasyev | 051d378 | 2012-07-03 10:10:15 -0700 | [diff] [blame] | 397 | iterator value = subnode->find (); |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 398 | if (value != 0) |
Alexander Afanasyev | 051d378 | 2012-07-03 10:10:15 -0700 | [diff] [blame] | 399 | return value; |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 400 | } |
| 401 | |
| 402 | return 0; |
| 403 | } |
| 404 | |
| 405 | |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 406 | template<typename FullKey, typename Payload, typename PayloadTraits, typename PolicyHook> |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 407 | inline void |
Alexander Afanasyev | b0c4389 | 2012-06-13 00:52:58 -0700 | [diff] [blame] | 408 | trie<FullKey, Payload, PayloadTraits, PolicyHook> |
| 409 | ::erase () |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 410 | { |
| 411 | payload_ = PayloadTraits::empty_payload; |
| 412 | prune (); |
| 413 | } |
| 414 | |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 415 | template<typename FullKey, typename Payload, typename PayloadTraits, typename PolicyHook> |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 416 | inline void |
Alexander Afanasyev | b0c4389 | 2012-06-13 00:52:58 -0700 | [diff] [blame] | 417 | trie<FullKey, Payload, PayloadTraits, PolicyHook> |
| 418 | ::prune () |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 419 | { |
| 420 | if (payload_ == 0 && children_.size () == 0) |
| 421 | { |
| 422 | if (parent_ == 0) return; |
| 423 | |
| 424 | trie *parent = parent_; |
| 425 | parent->children_.erase_and_dispose (*this, trie_delete_disposer ()); // delete this; basically, committing a suicide |
| 426 | |
| 427 | parent->prune (); |
| 428 | } |
| 429 | } |
| 430 | |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 431 | template<typename FullKey, typename Payload, typename PayloadTraits, typename PolicyHook> |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 432 | inline std::ostream& |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 433 | operator << (std::ostream &os, const trie<FullKey, Payload, PayloadTraits, PolicyHook> &trie_node) |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 434 | { |
| 435 | os << "# " << trie_node.key_ << ((trie_node.payload_ != 0)?"*":"") << std::endl; |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 436 | typedef trie<FullKey, Payload, PayloadTraits, PolicyHook> trie; |
Alexander Afanasyev | 051d378 | 2012-07-03 10:10:15 -0700 | [diff] [blame] | 437 | |
| 438 | for (typename trie::unordered_set::const_iterator subnode = trie_node.children_.begin (); |
| 439 | subnode != trie_node.children_.end (); |
| 440 | subnode++ ) |
| 441 | // BOOST_FOREACH (const trie &subnode, trie_node.children_) |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 442 | { |
| 443 | os << "\"" << &trie_node << "\"" << " [label=\"" << trie_node.key_ << ((trie_node.payload_ != 0)?"*":"") << "\"]\n"; |
Alexander Afanasyev | 051d378 | 2012-07-03 10:10:15 -0700 | [diff] [blame] | 444 | os << "\"" << &(*subnode) << "\"" << " [label=\"" << subnode->key_ << ((subnode->payload_ != 0)?"*":"") << "\"]""\n"; |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 445 | |
Alexander Afanasyev | 051d378 | 2012-07-03 10:10:15 -0700 | [diff] [blame] | 446 | os << "\"" << &trie_node << "\"" << " -> " << "\"" << &(*subnode) << "\"" << "\n"; |
| 447 | os << *subnode; |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 448 | } |
| 449 | |
| 450 | return os; |
| 451 | } |
| 452 | |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 453 | template<typename FullKey, typename Payload, typename PayloadTraits, typename PolicyHook> |
| 454 | inline void |
Alexander Afanasyev | b0c4389 | 2012-06-13 00:52:58 -0700 | [diff] [blame] | 455 | trie<FullKey, Payload, PayloadTraits, PolicyHook> |
| 456 | ::PrintStat (std::ostream &os) const |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 457 | { |
| 458 | os << "# " << key_ << ((payload_ != 0)?"*":"") << ": " << children_.size() << " children" << std::endl; |
| 459 | for (size_t bucket = 0, maxbucket = children_.bucket_count (); |
| 460 | bucket < maxbucket; |
| 461 | bucket++) |
| 462 | { |
| 463 | os << " " << children_.bucket_size (bucket); |
| 464 | } |
| 465 | os << "\n"; |
| 466 | |
| 467 | typedef trie<FullKey, Payload, PayloadTraits, PolicyHook> trie; |
Alexander Afanasyev | 051d378 | 2012-07-03 10:10:15 -0700 | [diff] [blame] | 468 | for (typename trie::unordered_set::const_iterator subnode = children_.begin (); |
| 469 | subnode != children_.end (); |
| 470 | subnode++ ) |
| 471 | // BOOST_FOREACH (const trie &subnode, children_) |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 472 | { |
Alexander Afanasyev | 051d378 | 2012-07-03 10:10:15 -0700 | [diff] [blame] | 473 | subnode->PrintStat (os); |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 474 | } |
| 475 | } |
| 476 | |
| 477 | |
| 478 | template<typename FullKey, typename Payload, typename PayloadTraits, typename PolicyHook> |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 479 | inline bool |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 480 | operator == (const trie<FullKey, Payload, PayloadTraits, PolicyHook> &a, |
| 481 | const trie<FullKey, Payload, PayloadTraits, PolicyHook> &b) |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 482 | { |
| 483 | return a.key_ == b.key_; |
| 484 | } |
| 485 | |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 486 | template<typename FullKey, typename Payload, typename PayloadTraits, typename PolicyHook> |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 487 | inline std::size_t |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 488 | hash_value (const trie<FullKey, Payload, PayloadTraits, PolicyHook> &trie_node) |
Alexander Afanasyev | fd0c41c | 2012-06-11 22:15:49 -0700 | [diff] [blame] | 489 | { |
| 490 | return boost::hash_value (trie_node.key_); |
| 491 | } |
Alexander Afanasyev | 89fb535 | 2012-06-12 22:43:16 -0700 | [diff] [blame] | 492 | |
Alexander Afanasyev | 30cb117 | 2012-07-06 10:47:39 -0700 | [diff] [blame] | 493 | } // ndnSIM |
| 494 | |
Alexander Afanasyev | 9a98970 | 2012-06-29 17:44:00 -0700 | [diff] [blame] | 495 | #endif // TRIE_H_ |