lib/libTrie/Trie.cc

   1 /*
   2  * Copyright (c) 2002,2003 Robert Collins <rbtcollins@hotmail.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   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, USA.
  17  *
  18  */
  19
  20 #include "squid.h"
  21 #include "Trie.h"
  22 #if HAVE_UNISTD_H
  23 #include <unistd.h>
  24 #endif
  25 #include "TrieCharTransform.h"
  26 #include "TrieNode.h"
  27
  28 #if !_USE_INLINE_
  29 #include "Trie.cci"
  30 #endif
  31
  32 Trie::Trie(TrieCharTransform *aTransform) : head(0) , transform(aTransform)
  33 {}
  34
  35 extern "C" void *TrieCreate()
  36 {
  37     return new Trie;
  38 }
  39
  40 Trie::~Trie()
  41 {
  42     delete head;
  43     delete transform;
  44 }
  45
  46 extern "C" void TrieDestroy(void *aTrie)
  47 {
  48     delete (Trie *)aTrie;
  49 }
  50
  51 extern "C" void *TrieFind(void *aTrie, char const *aString, size_t theLength)
  52 {
  53     return ((Trie *)aTrie)->find(aString, theLength);
  54 }
  55
  56 bool
  57 Trie::add(char const *aString, size_t theLength, void *privatedata)
  58 {
  59     if (!privatedata)
  60         return false;
  61
  62     if (head) {
  63         if (find(aString, theLength))
  64             return false;
  65
  66         return head->add(aString, theLength, privatedata, transform);
  67     }
  68
  69     head = new TrieNode;
  70
  71     return head->add(aString, theLength, privatedata, transform);
  72 }
  73
  74 extern "C" int TrieAdd(void *aTrie, char const *aString, size_t theLength, void *privatedata)
  75 {
  76
  77     return ((Trie *)aTrie)->add(aString, theLength, privatedata);
  78 }