-void xor(unsigned char *dst, unsigned char *src, size_t len);
-int32_t le24toh(uint8_t data[3]);
+void xor(unsigned char * dst, unsigned char * src, size_t len);
+int32_t le24toh (uint8_t data[3]);
+uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits);