added everything

engine/lightingSystem/sgHashMap.h

@@ -0,0 +1,92 @@
+//---------------------------------------------------------------
+// Synapse Gaming - Hash Map
+// Copyright <20> Synapse Gaming 2004 - 2005
+// Written by John Kabus
+//---------------------------------------------------------------
+
+#ifndef HASHMAP_H_
+#define HASHMAP_H_
+
+#include "platform/types.h"
+#include "core/tVector.h"
+
+
+template<class T, class Tinfo> class hash_multimap
+{
+public:
+	U32 hashCode;
+	// entry level info or single object per-entry...
+	Tinfo info;
+	// for storing multiple objects per-entry...
+	Vector<T> object;
+	hash_multimap *mapHigh;
+	hash_multimap *mapLow;
+	hash_multimap *linkHigh;
+	hash_multimap *linkLow;
+	hash_multimap()
+	{
+		// theoretical mean for hash code (balance the tree)...
+		hashCode = 0x7fffffff;
+		// this unfortunately clears objects after the constructor
+		// setups up values, but is necessary for clearing pointers...
+		dMemset(&info, 0, sizeof(Tinfo));
+		mapHigh = mapLow = linkHigh = linkLow = NULL;
+	}
+	hash_multimap(U32 hashcode)
+	{
+		hashCode = hashcode;
+		// this unfortunately clears objects after the constructor
+		// setups up values, but is necessary for clearing pointers...
+		dMemset(&info, 0, sizeof(Tinfo));
+		mapHigh = mapLow = linkHigh = linkLow = NULL;
+	}
+	virtual ~hash_multimap()
+	{
+		clear();
+	}
+	void clear()
+	{
+		if(mapHigh)
+			delete mapHigh;
+		if(mapLow)
+			delete mapLow;
+		mapHigh = mapLow = linkHigh = linkLow = NULL;
+	}
+	void relink(hash_multimap *high, hash_multimap *low, hash_multimap *insert)
+	{
+		if(high)
+			high->linkLow = insert;
+		if(low)
+			low->linkHigh = insert;
+		insert->linkHigh = high;
+		insert->linkLow = low;
+	}
+	hash_multimap *find(U32 hashcode)
+	{
+		if(hashcode == hashCode)
+			return this;
+		else if(hashcode < hashCode)
+		{
+			if(!mapLow)
+			{
+				mapLow = new hash_multimap(hashcode);
+				relink(this, this->linkLow, mapLow);
+				return mapLow;
+			}
+			return mapLow->find(hashcode);
+		}
+		else
+		{
+			if(!mapHigh)
+			{
+				mapHigh = new hash_multimap(hashcode);
+				relink(this->linkHigh, this, mapHigh);
+				return mapHigh;
+			}
+			return mapHigh->find(hashcode);
+		}
+	}
+};
+
+
+#endif//HASHMAP_H_