Add huffman tree utility

libmineziper/include/libmineziper_huffman_tree.h

@@ -0,0 +1,25 @@
+#ifndef LIBMINEZIPER_HUFFMAN_TREE_H
+#define LIBMINEZIPER_HUFFMAN_TREE_H
+
+#include "libmineziper_bitstream.h"
+
+typedef struct leaf
+{
+  int code;
+  short litteral;
+  char length;
+} leaf;
+
+typedef struct tree
+{
+  leaf* leaves;
+  unsigned int size;
+  unsigned int min, max;
+} tree;
+
+unsigned int* sort(unsigned char* ints, int size);
+void print_huffman_tree(tree t);
+tree build_tree(char* bit_lengths, int size);
+tree build_default_tree();
+
+#endif