Notes based on code as of Mon Apr 5 21:38:06 2010 -0400. This file only contains macros that convert data variables from the native format of the device output (MSB-first or LSB-first) into a standard form for gpsd use. This makes data parsing consistent regardless of the underlying format. If the device driver file makes no deliberate selection, the default is to assume the device emits data in big-endian (network byte) order.