ref: 4e91e4a2dbab9d79e1047cfc2094a438561b5a21
dir: /sys/src/cmd/aux/gps/dat.h/
typedef struct Place Place; struct Place { double lon; double lat; }; #pragma varargck type "L" Place enum { Undef = 0x80000000, Baud= 4800, /* 4800 is NMEA standard speed */ }; extern Place nowhere; extern int debug; int placeconv(Fmt*); Place strtopos(char*, char**); int strtolatlon(char*, char**, Place*);