import from github

tools/gbagfx/huff.h

@@ -0,0 +1,38 @@
+#ifndef HUFF_H
+#define HUFF_H
+
+union HuffNode;
+
+struct HuffData {
+    unsigned value:31;
+    unsigned isLeaf:1;
+};
+
+struct HuffLeaf {
+    struct HuffData header;
+    unsigned char key;
+};
+
+struct HuffBranch {
+    struct HuffData header;
+    union HuffNode * left;
+    union HuffNode * right;
+};
+
+union HuffNode {
+    struct HuffData header;
+    struct HuffLeaf leaf;
+    struct HuffBranch branch;
+};
+
+typedef union HuffNode HuffNode_t;
+
+struct BitEncoding {
+    unsigned long long nbits:6;
+    unsigned long long bitstring:58;
+};
+
+unsigned char * HuffCompress(unsigned char * buffer, int srcSize, int * compressedSize_p, int bitDepth);
+unsigned char * HuffDecompress(unsigned char * buffer, int srcSize, int * uncompressedSize_p);
+
+#endif //HUFF_H