Add unpacktool

unpacktool/PrefixCode.h

@@ -0,0 +1,52 @@
+#pragma once
+
+#include "CSInputBuffer.h"
+
+#include <vector>
+
+typedef struct XADCodeTreeNode XADCodeTreeNode;
+typedef struct XADCodeTableEntry XADCodeTableEntry;
+
+class XADPrefixCode final
+{
+public:
+	XADPrefixCode();
+	~XADPrefixCode();
+
+	void startBuildingTree();
+	void startZeroBranch();
+	void startOneBranch();
+	void finishBranches();
+	void makeLeafWithValue(int value);
+
+
+	std::vector<XADCodeTreeNode> tree;
+	int numentries, minlength, maxlength;
+	bool isstatic;
+
+	int currnode;
+	std::vector<int> stack;
+
+	int tablesize;
+	XADCodeTableEntry *table1, *table2;
+
+	static XADPrefixCode *prefixCode();
+	static XADPrefixCode *prefixCodeWithLengths(const int *lengths, int numsymbols, int maxlength, bool zeros);
+
+	void init();
+	bool initWithLengths(const int *lengths, int numSymbols, int maxlength, bool zeros);
+
+	bool addValueHighBitFirst(int value, uint32_t code, int length);
+	bool addValueHighBitFirst(int value, uint32_t code, int length, int repeatpos);
+	bool addValueLowBitFirst(int value, uint32_t code, int length);
+	bool addValueLowBitFirst(int value, uint32_t code, int length, int repeatpos);
+
+	void _pushNode();
+	void _popNode();
+
+	void _makeTable();
+	void _makeTableLE();
+};
+
+bool CSInputNextSymbolUsingCode(CSInputBuffer *buf, XADPrefixCode *code, int &outSymbol);
+bool CSInputNextSymbolUsingCodeLE(CSInputBuffer *buf, XADPrefixCode *code, int &outSymbol);