-uint8_t GetParity( char *string, uint8_t type, int length);
-void wiegand_add_parity(char *target, char *source, char length);
+uint8_t GetParity( uint8_t *string, uint8_t type, int length);
+void wiegand_add_parity(uint8_t *target, uint8_t *source, uint8_t length);
+
+void xor(unsigned char * dst, unsigned char * src, size_t len);
+int32_t le24toh (uint8_t data[3]);
+uint32_t le32toh (uint8_t *data);
+uint32_t PackBits(uint8_t start, uint8_t len, uint8_t* bits);
+void rol(uint8_t *data, const size_t len);
+uint32_t SwapBits(uint32_t value, int nrbits);
+uint32_t reflect(uint32_t v, int b);
+uint64_t HornerScheme(uint64_t num, uint64_t divider, uint64_t factor);