Recovered from microbel

common/lib/geometry/cache.C

@@ -0,0 +1,66 @@
+/*
+ * PVVMUD a 3D MUD
+ * Copyright (C) 1998-1999  Programvareverkstedet (pvv@pvv.org)
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+#include "pvvmud.H"
+#include "cache.H"
+
+CCache::CCache(){
+  cache = new CObjectList();
+}
+
+CObject * CCache::failFunc(int id){
+  return NULL;
+}
+
+CObject* CCache::add(int id, CObject * item){
+  CObjectListItem * listItem = cache->getFirst();
+
+  while ( listItem != NULL ){
+    CCacheItem * cacheItem = (CCacheItem*)listItem->getObject();
+    if (cacheItem->getId() == id){
+      return cacheItem->setItem(item);
+    }  
+    listItem = listItem->getNext();
+  }
+
+  CCacheItem * newItem = new CCacheItem(id,item);
+  cache->addLast((CObject*)newItem);
+  return NULL;
+}
+
+
+CObject * CCache::get(int id){
+  CObjectListItem * item = cache->getFirst();
+
+  while ( item != NULL ){
+    CCacheItem * cacheItem = (CCacheItem*)item->getObject();
+    if (cacheItem->getId() == id) return cacheItem->getItem();  
+    item = item->getNext();
+  }
+
+  // Failed to find object in cache calling failFunc
+  CObject * newObject = failFunc(id);
+  if (newObject != NULL) add(id,newObject);
+
+  return newObject;
+}
+
+void CCache::clear(){
+  cache->deleteAll();
+}