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dockapps/wmweather+/mrf.c
Carlos R. Mafra eea379d833 Strip off version numbers from dir name
2012-02-12 22:50:31 +00:00

319 lines
9.5 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 <math.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 "subst.h"
/* Important variables */
#define MRF_MAX 7
static time_t mrf_time=0;
static char *mrf_file=NULL;
static char *mrf_newfile=NULL;
static char *mrf_req[2]={ NULL, NULL };
static struct forecast forecasts[MRF_MAX];
/********* init functions ************/
static int parse_mrf(char *file);
static void reset_mrf(void){
int i;
for(i=0; i<MRF_MAX; i++) reset_forecast(&forecasts[i]);
}
void init_mrf(void){
int i;
char *e;
struct subst_val subs[]={
{ 's', STRING, &mrf_station },
{ 0, 0, 0 }
};
strncpy(bigbuf, mrf_station, BIGBUF_LEN-14);
bigbuf[BIGBUF_LEN-14]='\0';
for(e=bigbuf; *e!='\0'; e++);
strcpy(e, ".mrf.txt");
mrf_file=get_pid_filename(bigbuf);
strcpy(e, ".new-mrf.txt");
mrf_newfile=get_pid_filename(bigbuf);
if((mrf_req[0]=subst(mrf_uri, subs))==NULL) die("init_mrf");
if(mrf_post!=NULL && (mrf_req[1]=subst(mrf_post, subs))==NULL) die("init_mrf");
mrf_time=0;
/* Remove stale file */
unlink(mrf_file);
unlink(mrf_newfile);
reset_mrf();
for(i=0; i<MRF_MAX; i++) add_forecast(&forecasts[i], "MRF", mrf_station);
}
static void mrf_callback(char *filename, void *v){
struct stat statbuf;
if(stat(mrf_newfile, &statbuf)>=0){
if(S_ISREG(statbuf.st_mode) && statbuf.st_size!=0
&& diff(mrf_newfile, mrf_file) && parse_mrf(mrf_newfile)){
mrf_time=find_next_time(mrf_newfile, "MOS GUIDANCE", 1440);
rename(mrf_newfile, mrf_file);
} else {
unlink(mrf_newfile);
if(!parse_mrf(mrf_file)) reset_mrf();
}
}
}
void mrf_cleanup(void){
if(mrf_file==NULL) return;
unlink(mrf_newfile);
unlink(mrf_file);
}
void update_mrf(int force){
time_t t;
if(mrf_file==NULL) return;
t=time(NULL)/60;
if(!force && mrf_time>t) return;
mrf_time=find_next_time(mrf_file, "MOS GUIDANCE", 15);
download_file(mrf_newfile, mrf_req[0], mrf_req[1], 0, mrf_callback, NULL);
}
#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 INT(c) (tmp[0]=*c, tmp[1]=*(c+1), tmp[2]=*(c+2), tmp[3]=0, atoi(tmp))
static int parse_mrf(char *file){
FILE *fp;
char *s, *c;
int len;
int mon, day;
int i, j, m, x, y;
int flag;
char tmp[4]={0, 0, 0, 0};
flag=0;
reset_mrf();
if((fp=fopen(file, "r"))==NULL) return 0;
/* Look for something like an MRF 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();
mon=atoi(c-2);
x=atoi(c+1);
if(mon<1 || mon>12 || x<1 || x>31) DIE();
c=strchr(c+1, '/');
if(c==NULL || !isdigit(*(c-1)) || !isdigit(*(c+1))) DIE();
y=atoi(c+1)-1900;
NEXT(s);
if(len<10) DIE();
if(strncmp(s, "FHR", 3)) DIE();
NEXT(s);
if(len<10) DIE();
for(i=0; i<7; i++){
if(!strncmp(s, wdaynames[i], 3)) break;
}
if(i>=7) DIE();
day=atoi(s+4);
if(x>25 && day<5) mon++;
if(x<5 && day>25) mon--;
for(m=0; m<MRF_MAX; m++){
day++;
i++; i%=7;
fix_date(&mon, &day, &y, &j);
if(j!=i){
warn("Something wicked happened with the mrf_parse dates...");
DIE();
}
forecasts[m].month=mon;
forecasts[m].day=day;
forecasts[m].year=y;
forecasts[m].wday=i;
forecasts[m].hour=-1;
}
while(1){
NEXT(s);
if(len<=10) break;
if(!strncmp(s, "X/N", 3)){
for(c=s+12, m=0; c<s+len && m<MRF_MAX; c+=8, m++){
forecasts[m].high=INT(c);
if(c+4<s+len) forecasts[m].low=INT((c+4));
}
continue;
}
if(!strncmp(s, "TMP", 3)){
for(c=s+8, m=0; c<s+len && m<MRF_MAX; c+=8, m++){
i=INT(c); j=INT((c+4));
if(i!=999 && j!=999) forecasts[m].temp=(i+j)/2;
else if(i!=999) forecasts[m].temp=i;
else if(j!=999) forecasts[m].temp=j;
}
continue;
}
if(!strncmp(s, "DPT", 3)){
for(c=s+8, m=0; c<s+len && m<MRF_MAX; c+=8, m++){
i=INT(c); j=INT((c+4));
if(i!=999 && j!=999) forecasts[m].dewpt=(i+j)/2;
else if(i!=999) forecasts[m].dewpt=i;
else if(j!=999) forecasts[m].dewpt=j;
}
continue;
}
if(!strncmp(s, "WND", 3)){
for(c=s+8, m=0; c<s+len && m<MRF_MAX; c+=8, m++){
i=INT(c); j=INT((c+4));
if(i!=999 && j!=999) forecasts[m].windspeed=(i+j)/2;
else if(i!=999) forecasts[m].windspeed=i;
else if(j!=999) forecasts[m].windspeed=j;
}
continue;
}
if(!strncmp(s, "T24", 3)){
for(c=s+8, m=0; c<s+len && m<MRF_MAX; c+=8, m++){
i=atoi(c);
if(i!=999) forecasts[m].tstorm=i;
}
continue;
}
if(!strncmp(s, "Q24", 3)){
for(c=s+8, m=0; c<s+len && m<MRF_MAX; c+=8, m++){
i=atoi(c);
if(i!=9) forecasts[m].precipamt=i;
}
continue;
}
if(!strncmp(s, "SNW", 3)){
for(c=s+8, m=0; c<s+len && m<MRF_MAX; c+=8, m++){
i=atoi(c);
if(i!=9) forecasts[m].snowamt=i;
}
continue;
}
if(!strncmp(s, "CLD", 3)){
for(c=s+13, m=0; c<s+len && m<MRF_MAX; c+=8, m++){
if(*c=='C') forecasts[m].sky=0;
if(*c=='P'){
if(*(c-4)=='C') forecasts[m].sky=2;
else if(*(c-4)=='O') forecasts[m].sky=3;
else if(c+4<s+len && *(c+4)=='C') forecasts[m].sky=2;
else if(c+4<s+len && *(c+4)=='O') forecasts[m].sky=3;
else forecasts[m].sky=3;
}
if(*c=='O') forecasts[m].sky=4;
}
continue;
}
if(!strncmp(s, "PZP", 3)){
for(c=s+8, m=0; c<s+len && m<MRF_MAX; c+=8, m++){
i=INT(c); j=INT((c+4));
if(i!=999 && j!=999) forecasts[m].frz=(i+j)/2;
else if(i!=999) forecasts[m].frz=i;
else if(j!=999) forecasts[m].frz=j;
}
continue;
}
if(!strncmp(s, "PSN", 3)){
for(c=s+8, m=0; c<s+len && m<MRF_MAX; c+=8, m++){
i=INT(c); j=INT((c+4));
if(i!=999 && j!=999) forecasts[m].snow=(i+j)/2;
else if(i!=999) forecasts[m].snow=i;
else if(j!=999) forecasts[m].snow=j;
}
continue;
}
if(!strncmp(s, "PRS", 3)){
/* stick "rain & snow" prob into rain for later */
flag=1;
for(c=s+8, m=0; c<s+len && m<MRF_MAX; c+=8, m++){
i=INT(c); j=INT((c+4));
if(i!=999 && j!=999) forecasts[m].rain=(i+j)/2;
else if(i!=999) forecasts[m].rain=i;
else if(j!=999) forecasts[m].rain=j;
}
continue;
}
if(!strncmp(s, "P24", 3)){
for(c=s+8, m=0; c<s+len && m<MRF_MAX; c+=8, m++){
i=atoi(c);
if(i!=999) forecasts[m].pcp_total=i;
}
continue;
}
}
free(s);
fclose(fp);
for(m=0; m<MRF_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);
/* real rain = 100 - frz - snow
* real snow = snow + "rain & snow"
*/
i=100-forecasts[m].frz-forecasts[m].snow;
forecasts[m].snow+=forecasts[m].rain;
forecasts[m].rain=i;
forecasts[m].rain=forecasts[m].rain*forecasts[m].pcp_total/100;
forecasts[m].snow=forecasts[m].snow*forecasts[m].pcp_total/100;
forecasts[m].frz=forecasts[m].frz*forecasts[m].pcp_total/100;
/* These aren't really useful here... */
forecasts[m].temp=999;
forecasts[m].dewpt=999;
}
return 1;
}
#undef NEXT
#undef DIE
#undef INT
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