Create ClassForVlistCache.h

Add class KEY_SIZE_VALUE, used in database.cpp to find important subIDs and objIDs.
Add class Longlist_inMem, used in Vlist as cache

Util/ClassForVlistCache.h

@@ -0,0 +1,33 @@
+class KEY_SIZE_VALUE
+{
+public:
+	unsigned key, size, value;
+	KEY_SIZE_VALUE(unsigned _key = 0, unsigned _size = 0, unsigned _value = 0) : key(_key), size(_size), value(_value) {}
+	bool operator < (const KEY_SIZE_VALUE& b) const
+	{
+		return value > b.value;
+	}
+	bool operator > (const KEY_SIZE_VALUE& b) const
+	{
+		return value < b.value;
+	}
+
+};
+
+class Longlist_inMem
+{
+public:
+	int key;
+	unsigned _len;
+	char* _str;
+	Longlist_inMem()
+	{
+		key = -1;
+		_len = 0;
+		_str = NULL;
+	}
+	~Longlist_inMem()
+	{
+		if(_str != NULL)	delete []_str;
+	}
+};