+ // Card number.
+ uint32_t cardnum;
+
+ // Parity validity.
+ //
+ // When used with pack_short_hid, this determines if we should calculate
+ // parity values for the ID.
+ //
+ // When used with unpack_short_hid, this indicates if we got valid parity
+ // values for the ID.
+ bool parityValid;
+} short_hid_info;
+
+bool pack_short_hid(/* out */ uint32_t *hi, /* out */ uint32_t *lo, /* in */ const short_hid_info *info);
+bool unpack_short_hid(short_hid_info* out, uint32_t hi, uint32_t lo);
+
+int CmdLFHID(const char *Cmd);
+int CmdFSKdemodHID(const char *Cmd);
+int CmdHIDReadDemod(const char *Cmd);