* Add LZ77 Compression

include/LZ77/LZLookupTable.hpp

@@ -0,0 +1,39 @@
+#ifndef LZLOOKUPTABLE_HPP
+#define LZLOOKUPTABLE_HPP
+
+#include <map>
+#include <deque>
+#include <vector>
+#include <cstdint>
+#include <Athena/Types.hpp>
+
+struct LZLengthOffset
+{
+    atUint32 length;//The number of bytes compressed
+    atUint16 offset;//How far back in sliding window where bytes that match the lookAheadBuffer is located
+    bool compare_equal(const LZLengthOffset& lo_pair)
+    {
+        return length == lo_pair.length && offset == lo_pair.offset;
+    }
+};
+
+class LZLookupTable
+{
+public:
+    LZLookupTable();
+    LZLookupTable(atInt32 minimumMatch, atInt32 slidingWindow=4096, atInt32 lookAheadWindow=18);
+    ~LZLookupTable();
+    LZLengthOffset search(atUint8* curPos, const atUint8* dataBegin, const atUint8* dataEnd);
+    void setLookAheadWindow(atInt32 lookAheadWindow);
+private:
+    typedef std::multimap<std::vector<uint8_t>, int32_t> LookupTable;
+	LookupTable table;
+    atInt32 m_minimumMatch;
+    atInt32 m_slidingWindow;
+    atInt32 m_lookAheadWindow;
+    std::vector<uint8_t> m_buffer;
+	
+	
+};
+
+#endif // LZLOOKUPTABLE_HPP