changed: DirContainer - uses std::list instead of std::vector as the main container

we do not have to rebuild indexes after deleting some items
added:   DirContainer::DelById(long id)
changed: Dirs::CheckRootDir() addes the root dir if there is no one
added:   Dirs::DeleteDir(long id) - deletes specified directory (and its contents)
         (from the cache and the database)
added:   Db::DelDirById(long id) - deletes a dir from the database 
         and its first children
added:   standard function rm can delete directories


git-svn-id: svn://ttmath.org/publicrep/cmslu/trunk@487 e52654a7-88a9-db11-a3e9-0013d4bc506e

core/dircontainer.h

@@ -10,7 +10,7 @@
 #ifndef headerfiledircontainer
 #define headerfiledircontainer
 
-#include <vector>
+#include <list>
 #include <map>
 #include "item.h"
 #include "log.h"
@@ -20,9 +20,9 @@ class DirContainer
 {
 
 public:
-	typedef std::vector<Item> Table;
-	typedef Table::iterator   Iterator;
-	typedef Table::size_type  SizeType;
+	typedef std::list<Item>  Table;
+	typedef Table::iterator  Iterator;
+	typedef Table::size_type SizeType;
 
 	typedef std::map<long, Iterator>      TableId;
 	typedef std::multimap<long, Iterator> TableParent;
@@ -43,6 +43,8 @@ public:
 
 	Iterator FindId(long id);
 
+	bool DelById(long id);
+
 	ParentIterator ParentBegin();
 	ParentIterator ParentEnd();
 	ParentSizeType ParentSize();
@@ -53,17 +55,14 @@ public:
 
 private:
 
-	void AddIndexes(Iterator item);
-	void RebuildIndexes();
-
 	// main table with dirs
 	Table table;
 
 	// true if there is a root dir in the table
 	bool is_root;
 
-	// root dir
-	SizeType root_index;
+	// root 
+	Iterator root_iter;
 
 	// indexes
 	TableId table_id;