int
main (int argc, char **argv)
{
WeatherInfo info;
GOptionContext* context;
GError* error = NULL;
gdouble latitude, longitude;
WeatherLocation location;
gchar* gtime = NULL;
GDate gdate;
struct tm tm;
gboolean bsun, bmoon;
time_t phases[4];
const GOptionEntry entries[] = {
{ "latitude", 0, 0, G_OPTION_ARG_DOUBLE, &latitude,
"observer's latitude in degrees north", NULL },
{ "longitude", 0, 0, G_OPTION_ARG_DOUBLE, &longitude,
"observer's longitude in degrees east", NULL },
{ "time", 0, 0, G_OPTION_ARG_STRING, >ime,
"time in seconds from Unix epoch", NULL },
{ NULL }
};
memset(&location, 0, sizeof(WeatherLocation));
memset(&info, 0, sizeof(WeatherInfo));
context = g_option_context_new ("- test libmateweather sun/moon calculations");
g_option_context_add_main_entries (context, entries, NULL);
g_option_context_parse (context, &argc, &argv, &error);
if (error) {
perror (error->message);
return error->code;
}
else if (latitude < -90. || latitude > 90.) {
perror ("invalid latitude: should be [-90 .. 90]");
return -1;
} else if (longitude < -180. || longitude > 180.) {
perror ("invalid longitude: should be [-180 .. 180]");
return -1;
}
location.latitude = DEGREES_TO_RADIANS(latitude);
location.longitude = DEGREES_TO_RADIANS(longitude);
location.latlon_valid = TRUE;
info.location = &location;
info.valid = TRUE;
if (gtime != NULL) {
// printf(" gtime=%s\n", gtime);
g_date_set_parse(&gdate, gtime);
g_date_to_struct_tm(&gdate, &tm);
info.update = mktime(&tm);
} else {
info.update = time(NULL);
}
bsun = calc_sun_time(&info, info.update);
bmoon = calc_moon(&info);
printf (" Latitude %7.3f %c Longitude %7.3f %c for %s All times UTC\n",
fabs(latitude), (latitude >= 0. ? 'N' : 'S'),
fabs(longitude), (longitude >= 0. ? 'E' : 'W'),
asctime(gmtime(&info.update)));
printf("sunrise: %s",
(info.sunriseValid ? ctime(&info.sunrise) : "(invalid)\n"));
printf("sunset: %s",
(info.sunsetValid ? ctime(&info.sunset) : "(invalid)\n"));
if (bmoon) {
printf("moonphase: %g\n", info.moonphase);
printf("moonlat: %g\n", info.moonlatitude);
if (calc_moon_phases(&info, phases)) {
printf(" New: %s", asctime(gmtime(&phases[0])));
printf(" 1stQ: %s", asctime(gmtime(&phases[1])));
printf(" Full: %s", asctime(gmtime(&phases[2])));
printf(" 3rdQ: %s", asctime(gmtime(&phases[3])));
}
}
return 0;
}
static int parse_metar(char *file){
FILE *fp;
char *s, *c;
int ovector[ovecsize];
int ovalue;
int len;
float f;
int i, j;
reset_current(¤t);
if((fp=fopen(file, "r"))==NULL) return 0;
len=fread(bigbuf, sizeof(char), BIGBUF_LEN-2, fp);
fclose(fp);
if(len<1) return 0;
for(i=0; i<len; i++){
if(isspace(bigbuf[i])) bigbuf[i]=' ';
}
c=strstr(bigbuf, " RMK");
if(c!=NULL) *(c+1)='\0';
c=strstr(bigbuf, " TEMPO");
s=strstr(bigbuf, " BECMG");
if(c!=NULL) *(c+1)='\0';
if(s!=NULL) *(s+1)='\0';
/* XXX: parse trend forecast data? */
len=strlen(bigbuf);
if(bigbuf[len-1]!=' '){
bigbuf[len++]=' ';
bigbuf[len]='\0';
}
/* Look for something like a METAR coded report */
ovalue=pcre_exec(station_time, NULL, bigbuf, len, 0, 0, ovector, ovecsize);
if(ovalue<=0) return 0;
if(pcre_get_substring(bigbuf, ovector, ovalue, 1, (const char **)&c)<0) return 0;
if(c[0]!='\0') current.date=atoi(c);
pcre_free_substring(c);
if(pcre_get_substring(bigbuf, ovector, ovalue, 2, (const char **)&c)<0) return 0;
current.time=atoi(c);
pcre_free_substring(c);
/* Chop off extraneous stuff */
if(pcre_get_substring(bigbuf, ovector, ovalue, 3, (const char **)&s)<0) return 0;
/* windspeed, winddir */
ovalue=pcre_exec(wind, NULL, s, len, 0, 0, ovector, ovecsize);
if(ovalue>0){
get_substr(4, c);
if(c[0]!='\0'){
current.winddir=0;
} else {
pcre_free_substring(c);
get_substr(1, c);
if(c[0]=='V') current.winddir=0;
else current.winddir=((int)((atoi(c)+11.25)/22.5))%16+1;
}
pcre_free_substring(c);
get_substr(2, c);
current.windspeed=atoi(c);
pcre_free_substring(c);
get_substr(3, c);
if(c[0]=='M'){ /* MPS */
current.windspeed=mps2knots(current.windspeed);
} else if(c[0]=='K' && c[1]=='M'){ /* KMH */
current.windspeed=kph2knots(current.windspeed);
}
}
/* vis */
f=99;
c=strstr(s, " M1/4SM ");
if(c!=NULL){
f=0;
goto wind_done;
}
ovalue=pcre_exec(vis[2], NULL, s, len, 0, 0, ovector, ovecsize);
if(ovalue>0){
get_substr(2, c);
i=atoi(c);
pcre_free_substring(c);
get_substr(3, c);
j=atoi(c);
pcre_free_substring(c);
get_substr(1, c);
f=atoi(c)+(float)i/j;
pcre_free_substring(c);
goto wind_done;
}
ovalue=pcre_exec(vis[1], NULL, s, len, 0, 0, ovector, ovecsize);
if(ovalue>0){
get_substr(2, c);
i=atoi(c);
pcre_free_substring(c);
get_substr(1, c);
f=(float)atoi(c)/i;
pcre_free_substring(c);
goto wind_done;
}
ovalue=pcre_exec(vis[0], NULL, s, len, 0, 0, ovector, ovecsize);
if(ovalue>0){
get_substr(1, c);
f=atoi(c);
pcre_free_substring(c);
goto wind_done;
}
c=strstr(s, " CAVOK ");
if(c!=NULL){
f=99;
current.sky=0;
goto wind_done;
}
ovalue=pcre_exec(vis[3], NULL, s, len, 0, 0, ovector, ovecsize);
if(ovalue>0){
get_substr(1, c);
f=m2mi(atoi(c));
pcre_free_substring(c);
goto wind_done;
}
wind_done:
if(f<=6) current.vis=6;
if(f<=5) current.vis=5;
if(f<3) current.vis=4;
if(f<1) current.vis=3;
if(f<=.5) current.vis=2;
if(f<=.25) current.vis=1;
/* temp, rh */
ovalue=pcre_exec(temp, NULL, s, len, 0, 0, ovector, ovecsize);
if(ovalue>0){
get_substr(1, c);
if(c[0]=='M') c[0]='-';
current.temp=atoi(c);
pcre_free_substring(c);
get_substr(2, c);
if(c[0]!='\0'){
if(c[0]=='M') c[0]='-';
current.rh=rh_C(current.temp, atoi(c));
}
pcre_free_substring(c);
}
/* pressure */
ovalue=pcre_exec(pressure, NULL, s, len, 0, 0, ovector, ovecsize);
if(ovalue>0){
get_substr(2, c);
i=atoi(c);
pcre_free_substring(c);
get_substr(1, c);
if(c[0]=='Q'){
current.pressure=hPa2inHg(i);
} else {
current.pressure=i/100.0;
}
pcre_free_substring(c);
}
/* sky */
if(strstr(s, " SKC")!=NULL || strstr(s, " CLR")!=NULL) current.sky=0;
if(strstr(s, " FEW")!=NULL) current.sky=1;
if(strstr(s, " SCT")!=NULL) current.sky=2;
if(strstr(s, " BKN")!=NULL) current.sky=3;
if(strstr(s, " OVC")!=NULL || strstr(s, " VV")!=NULL) current.sky=4;
/* obs, frz, snow, rain, tstorm */
/* There can be multiple weather chunks, so we while loop */
j=0;
while((ovalue=pcre_exec(weather, NULL, s, len, j, 0, ovector, ovecsize))>0){{
char *in, *de, *pp, *ob, *ot;
j=ovector[0]+1;
get_substr(0, c);
i=(c[1]=='\0');
pcre_free_substring(c);
if(i) continue;
get_substr(1, in);
get_substr(2, de);
get_substr(3, pp);
get_substr(4, ob);
get_substr(5, ot);
#define IN(haystack, needle) ((needle[0]=='\0')?0:strstr(haystack, needle))
if(current.obs<1 && strcmp(de, "FZ") && IN("BR|FG", ob))
current.obs=1;
if(current.obs<2 && IN("FU|VA|DU|SA|HZ|PY", ob))
current.obs=2;
if(current.obs<3 && IN("PO|SS|DS", ot))
current.obs=3;
if(current.obs<3 && IN("DR|BL", de)
&& (strstr(pp, "SN") || IN("DU|SA|PY", ob)))
current.obs=3;
if(!strcmp(ot, "FC")){
current.sky=5;
current.obs=99;
current.vis=7;
}
#undef IN
i=66;
if(in[0]=='-' || in[0]=='V') i=33;
if(in[0]=='+') i=99;
if(!strcmp(de, "SH")) i=33;
if(current.frz<i
&& ((!strcmp(de, "FZ") && (strstr(pp, "DZ") || strstr(pp, "RA")))
|| strstr(pp, "IC") || strstr(pp, "PE") || strstr(pp, "PL")
|| strstr(pp, "GR") || strstr(pp, "GS")))
current.frz=i;
if(current.snow<i && strcmp(de, "BL")
&& (strstr(pp, "SN") || strstr(pp, "SG")))
current.snow=i;
if(current.rain<i && (strstr(pp, "UP")
|| (strcmp(de, "FZ")
&& (strstr(pp, "DZ") || strstr(pp, "RA")))))
current.rain=i;
if(current.tstorm<i && !strcmp(de, "TS"))
current.tstorm=i;
pcre_free_substring(in);
pcre_free_substring(de);
pcre_free_substring(pp);
pcre_free_substring(ob);
pcre_free_substring(ot);
}}
if(current.obs==99) current.obs=0;
pcre_free_substring(s); /* Done parsing! Just a few final calculations... */
current.heatindex=heatindex_C(current.temp, current.rh);
current.windchill=windchill_C(current.temp, current.windspeed);
/* Figure out the proper month... */
{
int mon, day, year, time2; /* holds UTC */
int y; /* with current.*, holds local time */
time_t t=time(NULL);
struct tm *tm=gmtime(&t);
current.month=tm->tm_mon+1;
if(tm->tm_mday<current.date) current.month--;
if(current.month<1){ current.month+=12; tm->tm_year--; }
y=year=tm->tm_year;
mon=current.month;
day=current.date;
time2=current.time;
current.time=utc2local((int)current.time, ¤t.month, ¤t.date, &y, NULL);
if(latitude!=999 && calcSolarZenith(latitude, longitude, year, mon, day, hm2min(time2))>90)
current.moon=calc_moon(current.month, current.date, y, current.time);
}
return 1;
}
