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dockapps/wmweather+-2.12/eta.c
Carlos R. Mafra 21625f40b5 Initial dockapps git repo 
I tried to get the latest versions from dockapps.org, but I haven't
tested any of them.

More dockapps will be added as time permits.
2011-03-25 19:45:13 +01:00

366 lines
10 KiB
C
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#include "config.h"
/* Copyright (C) 2002 Brad Jorsch <anomie@users.sourceforge.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <sys/stat.h>
#include "wmweather+.h"
#include "forecast.h"
#include "getLine.h"
#include "convert.h"
#include "download.h"
#include "diff.h"
#include "die.h"
#include "sunzenith.h"
#include "moon.h"
#include "subst.h"
/* Important variables */
#define ETA_MAX 21
static time_t eta_time=0;
static char *eta_file=NULL;
static char *eta_newfile=NULL;
static char *eta_req[2]={ NULL, NULL };
static struct forecast forecasts[ETA_MAX];
/********* init functions ************/
static int parse_eta(char *file);
static void reset_eta(void){
int i;
for(i=0; i<ETA_MAX; i++) reset_forecast(&forecasts[i]);
}
void init_eta(void){
char *e;
int i;
struct subst_val subs[]={
{ 's', STRING, &eta_station },
{ 0, 0, 0 }
};
strncpy(bigbuf, eta_station, BIGBUF_LEN-14);
bigbuf[BIGBUF_LEN-14]='\0';
for(e=bigbuf; *e!='\0'; e++);
strcpy(e, ".eta.txt");
eta_file=get_pid_filename(bigbuf);
strcpy(e, ".new-eta.txt");
eta_newfile=get_pid_filename(bigbuf);
if((eta_req[0]=subst(eta_uri, subs))==NULL) die("init_eta");
if(eta_post!=NULL && (eta_req[1]=subst(eta_post, subs))==NULL) die("init_eta");
eta_time=0;
/* Remove stale file */
unlink(eta_file);
unlink(eta_newfile);
reset_eta();
for(i=0; i<ETA_MAX; i++) add_forecast(&forecasts[i], "ETA", eta_station);
}
/********* download functions ************/
static void eta_callback(char *filename, void *v){
struct stat statbuf;
if(stat(eta_newfile, &statbuf)>=0){
if(S_ISREG(statbuf.st_mode) && statbuf.st_size!=0
&& diff(eta_newfile, eta_file) && parse_eta(eta_newfile)){
eta_time=find_next_time(eta_newfile, "MOS GUIDANCE", 720);
rename(eta_newfile, eta_file);
} else {
unlink(eta_newfile);
if(!parse_eta(eta_file)) reset_eta();
}
}
}
void eta_cleanup(void){
if(eta_file==NULL) return;
unlink(eta_newfile);
unlink(eta_file);
}
void update_eta(int force){
time_t t;
if(eta_file==NULL) return;
t=time(NULL)/60;
if(!force && eta_time>t) return;
eta_time=find_next_time(eta_file, "MOS GUIDANCE", 15);
download_file(eta_newfile, eta_req[0], eta_req[1], force?DOWNLOAD_KILL_OTHER_REQUESTS:0, eta_callback, NULL);
}
/********* parse functions ************/
#define NEXT(s) free(s); \
len=getLine(&s, fp); \
if(strstr(s, "</PRE>")!=NULL) len=0;
#define DIE() return (free(s), fclose(fp), 0)
#define SPLIT(s) { \
ID[0]=s[0]; \
ID[1]=s[1]; \
ID[2]=s[2]; \
ID[3]='\0'; \
memset(split,'\0',sizeof(split)); \
for(n=0, c=s+4; c<s+len && n<ETA_MAX; n++, c+=3){ \
split[n][0]=c[0]; \
split[n][1]=c[1]; \
split[n][2]=c[2]; \
split[n][3]='\0'; \
} \
}
#define ASSIGN(field) \
for(n=0; n<ETA_MSG_MAX; n++) forecasts[n].field=atoi(split[n]);
#define ASSIGN2(field, inval) \
for(n=0; n<ETA_MSG_MAX; n++){ \
i=atoi(split[n]); \
if(i!=inval) forecasts[n].field=i; \
}
static int parse_eta(char *file){
int ETA_MSG_MAX = ETA_MAX;
FILE *fp;
char *s, *c;
int len;
int mon, day;
int h, i=0, j, k, m, n, x, y, z;
char ID[4];
char split[ETA_MAX][4];
reset_eta();
if((fp=fopen(file, "r"))==NULL) return 0;
/* Look for something like an ETA coded forecast */
c=NULL;
while(!feof(fp)){
len=getLine(&s, fp);
if((c=strstr(s, "MOS GUIDANCE"))!=NULL) break;
free(s);
}
if(c==NULL) return (fclose(fp), 0);
c=strchr(c, '/');
if(c==NULL || !isdigit(*(c-1)) || !isdigit(*(c+1))) DIE();
m=atoi(c-2);
c=strchr(c+1, '/');
if(c==NULL || !isdigit(*(c-1)) || !isdigit(*(c+1))) DIE();
y=atoi(c+1)-1900;
/* get first date */
NEXT(s);
if(len<10) DIE();
if(strncmp(s, "DT ", 3)) DIE();
mon=13;
c=s;
i=4;
while(mon>12){
c=strchr(c+1, '/');
if(c==NULL) DIE();
for(mon=1; mon<=12; mon++){
if(!strncmp(c+1, monthnames[mon], 3) && isspace(*(c+4))) break;
if(!strncmp(c+1, monthnames2[mon], 4) && isspace(*(c+5))){
i=5;
break;
}
}
}
day=atoi(c+i);
if(day<1) DIE();
if(c>s+4) day--;
if(mon<m) y++;
NEXT(s);
if(len<10) DIE();
if(strncmp(s, "HR ", 3)) DIE();
x=day;
m=mon;
SPLIT(s);
for(n=0; n<ETA_MAX; n++){
if(split[n][0]=='\0'){
ETA_MSG_MAX = n;
break;
}
i=atoi(split[n]);
if(i==0){
x++;
fix_date(&mon, &x, &y, NULL);
}
m=mon;
j=x;
z=y;
h=utc2local(i*100, &m, &j, &z, &k)/100;
forecasts[n].month=m;
forecasts[n].day=j;
forecasts[n].year=z;
forecasts[n].hour=h;
forecasts[n].wday=k;
if(latitude!=999 && calcSolarZenith(latitude, longitude, y, mon, x, i*60)>90)
forecasts[n].moon=calc_moon(m, j, z, h*100);
}
while(1){
NEXT(s);
if(len<=10) break;
SPLIT(s);
if(!strcmp(ID, "X/N")) j=1;
else if(!strcmp(ID, "N/X")) j=2;
else j=0;
if(j!=0){
for(n=0; n<ETA_MSG_MAX; n++){
if(!isdigit(split[n][2])) continue;
i=atoi(split[n]);
k=day+(j>>1);
for(m=0; m<ETA_MSG_MAX; m++){
if((j&1)==1 &&
((forecasts[m].day==k-1 && forecasts[m].hour>=19)
|| (forecasts[m].day==k && forecasts[m].hour<19)))
forecasts[m].high=i;
if((j&1)==0 &&
((forecasts[m].day==k-1 && forecasts[m].hour>=8)
|| (forecasts[m].day==k && forecasts[m].hour<8)))
forecasts[m].low=i;
}
j++;
}
continue;
}
if(!strcmp(ID, "TMP")){
ASSIGN(temp);
continue;
}
if(!strcmp(ID, "DPT")){
ASSIGN(dewpt);
continue;
}
if(!strcmp(ID, "WDR")){
for(n=0; n<ETA_MSG_MAX; n++){
i=atoi(split[n]);
if(i==99) forecasts[n].winddir=0;
else forecasts[n].winddir=((int)((i+1.125)/2.25))%16+1;
}
continue;
}
if(!strcmp(ID, "WSP")){
ASSIGN2(windspeed, 99);
continue;
}
if(!strcmp(ID, "P06")){
for(m=0; m<ETA_MSG_MAX; m++){
if(!isdigit(split[m][2])) continue;
i=atoi(split[m]);
if(i!=999){
forecasts[m].pcp_total=i;
/* ETA_MSG_MAX-2 because the last 2
* are already 6-hour intervals */
if(m>0 && m<ETA_MSG_MAX-2) forecasts[m-1].pcp_total=i;
}
}
continue;
}
if(!strcmp(ID, "T06")){
for(m=1; m<ETA_MSG_MAX; m+=2){
if(!isdigit(split[m][2])) continue;
i=atoi(split[m]); if(i==999) i=0;
j=atoi(split[m+1]+1); if(j==99) j=0;
j=i*j/100;
forecasts[m].tstorm=forecasts[m+1].tstorm=i;
forecasts[m].svtstorm=forecasts[m+1].svtstorm=j;
}
continue;
}
if(!strcmp(ID, "Q06")){
for(m=0; m<ETA_MSG_MAX; m++){
if(!isdigit(split[m][2])) continue;
i=atoi(split[m]);
if(i!=999){
forecasts[m].precipamt=i;
/* ETA_MSG_MAX-2 because the last 2
* are already 6-hour intervals */
if(m>0 && m<ETA_MSG_MAX-2) forecasts[m-1].precipamt=i;
}
}
continue;
}
if(!strcmp(ID, "CLD")){
for(m=0; m<ETA_MSG_MAX; m++){
if(split[m][1]=='C') forecasts[m].sky=0;
if(split[m][1]=='F') forecasts[m].sky=1;
if(split[m][1]=='S') forecasts[m].sky=2;
if(split[m][1]=='B') forecasts[m].sky=3;
if(split[m][1]=='O') forecasts[m].sky=4;
}
continue;
}
if(!strcmp(ID, "VIS")){
ASSIGN2(vis, 9);
continue;
}
if(!strcmp(ID, "OBV")){
for(m=0; m<ETA_MSG_MAX; m++){
if(split[m][2]=='N') forecasts[m].obs=0;
if(split[m][2]=='R' || split[m][2]=='G') forecasts[m].obs=1;
if(split[m][2]=='Z') forecasts[m].obs=2;
if(split[m][2]=='L') forecasts[m].obs=3;
}
continue;
}
if(!strcmp(ID, "POZ")){
ASSIGN2(frz, 999);
continue;
}
if(!strcmp(ID, "POS")){
ASSIGN2(snow, 999);
continue;
}
}
free(s);
fclose(fp);
for(m=0; m<ETA_MSG_MAX; m++){
forecasts[m].rh=rh_F(forecasts[m].temp, forecasts[m].dewpt);
forecasts[m].heatindex=heatindex_F(forecasts[m].temp, forecasts[m].rh);
forecasts[m].windchill=windchill_F(forecasts[m].temp, forecasts[m].windspeed);
forecasts[m].rain=93-forecasts[m].frz-forecasts[m].snow;
forecasts[m].rain=forecasts[m].rain*forecasts[m].pcp_total/93;
forecasts[m].snow=forecasts[m].snow*forecasts[m].pcp_total/93;
forecasts[m].frz=forecasts[m].frz*forecasts[m].pcp_total/93;
}
return 1;
}
#undef NEXT
#undef DIE
#undef SPLIT
#undef ASSIGN
#undef ASSIGN2
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