1 files changed, 89 insertions, 0 deletions
diff --git a/lib/cppparser/cachemanager.cpp b/lib/cppparser/cachemanager.cpp
new file mode 100644
index 00000000..966f4440
--- /dev/null
+++ b/lib/cppparser/cachemanager.cpp
@@ -0,0 +1,89 @@
+/***************************************************************************
+   copyright            : (C) 2006 by David Nolden
+   email                : david.nolden.kdevelop@art-master.de
+***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   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.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#include "cachemanager.h"
+#include <kdebug.h>
+
+void CacheNode::access() const {
+  m_manager->access( this );
+}
+
+void CacheManager::remove( const CacheNode* node ) {
+  m_set.erase( node );
+}
+
+void CacheManager::add( const CacheNode* node ) {
+  m_set.insert( node );
+}
+
+CacheNode::CacheNode( Manager* manager ) : m_manager( manager ), m_value(manager->currentMax()) { //initialize m_value with the current maximum, so the new node has a chance even in a cache full of high-rated nodes
+  m_manager->add( this  );
+}
+  
+CacheNode::~CacheNode() {
+  m_manager->remove( this );
+};
+
+void CacheManager::restart( uint normalizeby ) {
+  m_currentFrame = 1;
+  m_currentMax = 1;
+  SetType oldSet = m_set;
+  m_set = SetType();
+  for( SetType::iterator it = oldSet.begin(); it != oldSet.end(); ++it ) {
+    int newValue = (*it)->value() / ( normalizeby / 1000 );
+    if( newValue > m_currentMax ) m_currentMax = newValue;
+    (*it)->setValue( newValue ); ///This way not all information is discarded
+    m_set.insert( *it );
+  }
+}
+
+void CacheManager::access( const CacheNode* node ) {
+  static const int limit = (std::numeric_limits<uint>::max() / 3)*2;
+  m_set.erase( node );
+  node->setValue( m_currentMax+1 );
+  m_set.insert( node );
+  if( node->value() > m_currentMax )
+    m_currentMax = node->value();
+  if( node->value() > limit )
+    restart( node->value() );
+}
+
+void CacheManager::setMaxNodes ( int maxNodes ) {
+  m_maxNodes = maxNodes;
+  increaseFrame();
+}
+
+void CacheManager::increaseFrame() {
+  m_currentFrame ++;
+  if( m_set.size() > m_maxNodes ) {
+    //kdDebug( 9007 ) << "CacheManager: Have " << m_set.size() << " nodes, maximum is " << m_maxNodes << ", erasing." << endl;
+    int mustErase = m_set.size() - m_maxNodes;
+    while( !m_set.empty() && mustErase != 0 ) {
+      --mustErase;
+      SetType::iterator it = m_set.begin();
+      erase( *it );
+    }
+    //kdDebug( 9007 ) << "CacheManager: Have " << m_set.size() << " nodes after erasing." << endl;
+  }
+}
+
+void CacheManager::removeLowerHalf() {
+  int maxNodes = m_maxNodes;
+  setMaxNodes( m_set.size() / 2 );
+  setMaxNodes( maxNodes );
+}
+
+void CacheManager::saveMemory() {
+  removeLowerHalf();
+}