libgps.c
Functions:-The client interface library for the gpsd daemon.
Notes based on code as of Mon Apr 5 21:38:06 2010 -0400
char *deg_to_str(enum deg_str_type type, double f)
Convert the absolute value of double degrees to a static string
and return a pointer to it.
Makes a simple check on invalid degree values (not more
than 360) and returns "nan" on error.
For valid values, it generates the appropriate string according
to the string type enumeration: dd, ddmm or ddmmss.
Warning: not thread safe.
char *deg_to_str2(enum deg_str_type type, double f, char *buf,
unsigned int buf_size, const char *suffix_pos, const char *suffix_neg)
Convert the absolute value of double degrees to a string
and place in the buffer "buf". Return a pointer to the buffer.
"buf_size" is the size of the buffer.
Makes a simple check on invalid degree values (not more
than 360) and returns "nan" on error.
For valid values, it generates the appropriate string according
to the string type enumeration: dd, ddmm or ddmmss. If the
degrees are positive, append "suffix_pos", else append "suffix_neg".
enum unit gpsd_units(void)
Simple check of the environment to determine what units are required. If all else fails, use compiled in units.