| 1 |
greg |
2.1 |
#ifndef lint |
| 2 |
greg |
2.3 |
static const char RCSid[] = "$Id: loadEPW.c,v 2.2 2025/02/27 19:00:00 greg Exp $"; |
| 3 |
greg |
2.1 |
#endif |
| 4 |
|
|
/* |
| 5 |
|
|
* Load an EPW (or WEA) file, one data point at a time |
| 6 |
|
|
* |
| 7 |
|
|
* G. Ward, Feb 2025 |
| 8 |
|
|
*/ |
| 9 |
|
|
|
| 10 |
|
|
#include "rtio.h" |
| 11 |
|
|
#include <stdlib.h> |
| 12 |
|
|
#include <ctype.h> |
| 13 |
|
|
#include "loadEPW.h" |
| 14 |
|
|
|
| 15 |
|
|
const char WDname[7][10] = { |
| 16 |
|
|
"Sunday", "Monday", "Tuesday", "Wednesday", |
| 17 |
|
|
"Thursday", "Friday", "Saturday" |
| 18 |
|
|
}; |
| 19 |
|
|
|
| 20 |
|
|
const char MOname[12][10] = { |
| 21 |
greg |
2.3 |
"January", "February", "March", "April", "May", "June", "July", |
| 22 |
greg |
2.1 |
"August", "September", "October", "November", "December" |
| 23 |
|
|
}; |
| 24 |
|
|
|
| 25 |
|
|
#define EPWDATE_INIT {.0f,0,0,0} |
| 26 |
|
|
|
| 27 |
|
|
static const struct DataPeriod EPWperiodInit = { |
| 28 |
|
|
"DEFAULT", 1, Sunday, {.0f, 1, 0, 0}, {24.f, 31, 11, 0} |
| 29 |
|
|
}; |
| 30 |
|
|
|
| 31 |
|
|
const EPWrecord EPWrecInit = { |
| 32 |
|
|
EPWDATE_INIT, "", 99.9f, 99.9f, 999.f, 999999.f, 9999.f, 9999.f, 9999.f, |
| 33 |
|
|
9999.f, 9999.f, 9999.f, 999999.f, 999999.f, 999999.f, 9999.f, 999.f, 999.f, |
| 34 |
|
|
99.f, 99.f, 9999e3f, 99999.f, 999e-3f, 999e-3f, 999e-2f, 99, |
| 35 |
|
|
.0f, 1.5e-3f, .0f |
| 36 |
|
|
}; |
| 37 |
|
|
|
| 38 |
|
|
#define EPWdateInit (EPWrecInit.date) |
| 39 |
|
|
|
| 40 |
|
|
static const short mo_da[13] = {0,31,59,90,120,151,181,212,243,273,304,334,365}; |
| 41 |
|
|
|
| 42 |
|
|
/* Get day-of-week from name (may be abbreviated) */ |
| 43 |
|
|
static int |
| 44 |
|
|
get_day(const char dnm[]) |
| 45 |
|
|
{ |
| 46 |
|
|
int n = strlen(dnm); |
| 47 |
|
|
int i; |
| 48 |
|
|
|
| 49 |
|
|
if (n < 3) |
| 50 |
|
|
return(-1); |
| 51 |
|
|
|
| 52 |
|
|
for (i = 0; i < 7; i++) |
| 53 |
|
|
if (!strncasecmp(dnm, WDname[i], n)) |
| 54 |
|
|
return(i); |
| 55 |
|
|
return(-1); |
| 56 |
|
|
} |
| 57 |
|
|
|
| 58 |
|
|
/* Hour difference calculator dt1 - dt2 (crude) */ |
| 59 |
|
|
static double |
| 60 |
|
|
hour_diff(const EPWdate *dt1, const EPWdate *dt2) |
| 61 |
|
|
{ |
| 62 |
|
|
double hrdiff = dt1->hour - dt2->hour; |
| 63 |
|
|
|
| 64 |
|
|
hrdiff += 24.*(mo_da[dt1->month] + dt1->day - mo_da[dt2->month] - dt2->day); |
| 65 |
|
|
|
| 66 |
|
|
if ((dt1->year > 0) & (dt2->year > 0)) |
| 67 |
|
|
hrdiff += 365.*24.*(dt1->year - dt2->year); |
| 68 |
|
|
|
| 69 |
|
|
return(hrdiff); |
| 70 |
|
|
} |
| 71 |
|
|
|
| 72 |
|
|
/* Check that a date/time is legal */ |
| 73 |
|
|
static int |
| 74 |
|
|
date_OK(const EPWdate *dt) |
| 75 |
|
|
{ |
| 76 |
|
|
if ((0 > dt->month) | (dt->month > 11) | |
| 77 |
|
|
(0 > dt->hour) | (dt->hour > 24) | (dt->day < 1)) |
| 78 |
|
|
return(0); |
| 79 |
|
|
|
| 80 |
|
|
return(dt->day <= (dt->month==1 ? 29 : |
| 81 |
|
|
mo_da[dt->month+1] - mo_da[dt->month])); |
| 82 |
|
|
} |
| 83 |
|
|
|
| 84 |
|
|
/* Parse date (less hour) */ |
| 85 |
|
|
static int |
| 86 |
|
|
get_date(EPWdate *dt, const char date[]) |
| 87 |
|
|
{ |
| 88 |
|
|
int mo, da, yr; |
| 89 |
|
|
int nf; |
| 90 |
|
|
|
| 91 |
|
|
*dt = EPWdateInit; |
| 92 |
|
|
switch (sscanf(date, "%d/%d/%d", &mo, &da, &yr)) { |
| 93 |
|
|
case 1: |
| 94 |
|
|
da = mo; /* jdate */ |
| 95 |
|
|
if (da <= 0) |
| 96 |
|
|
return(0); |
| 97 |
|
|
for (mo = 0; mo_da[mo+1] < da; mo++) |
| 98 |
|
|
if (mo >= 11) |
| 99 |
|
|
return(0); |
| 100 |
|
|
dt->day = da - mo_da[dt->month = mo]; |
| 101 |
|
|
return(1); |
| 102 |
|
|
case 3: /* month/day/year */ |
| 103 |
|
|
dt->year = yr; |
| 104 |
|
|
/* fall through */ |
| 105 |
|
|
case 2: /* month/day */ |
| 106 |
|
|
dt->month = mo-1; |
| 107 |
|
|
dt->day = da; |
| 108 |
|
|
return(date_OK(dt)); |
| 109 |
|
|
} |
| 110 |
|
|
return(0); |
| 111 |
|
|
} |
| 112 |
|
|
|
| 113 |
|
|
/* Check that site data is sensible */ |
| 114 |
|
|
static int |
| 115 |
|
|
bad_location(const struct Location *lp) |
| 116 |
|
|
{ |
| 117 |
|
|
if ((-90. > lp->latitude) | (lp->latitude > 90.)) { |
| 118 |
|
|
fputs("Bad latitude in ", stderr); |
| 119 |
|
|
return(1); |
| 120 |
|
|
} |
| 121 |
|
|
if ((-180. > lp->longitude) | (lp->longitude > 180.)) { |
| 122 |
|
|
fputs("Bad longitude in ", stderr); |
| 123 |
|
|
return(2); |
| 124 |
|
|
} |
| 125 |
|
|
if ((-12. > lp->timezone) | (lp->timezone > 12.)) { |
| 126 |
|
|
fputs("Bad time zone in ", stderr); |
| 127 |
|
|
return(3); |
| 128 |
|
|
} |
| 129 |
|
|
if ((-1000. > lp->elevation) | (lp->elevation > 9999.9)) { |
| 130 |
|
|
fputs("Bad elevation in ", stderr); |
| 131 |
|
|
return(4); |
| 132 |
|
|
} |
| 133 |
|
|
return(0); |
| 134 |
|
|
} |
| 135 |
|
|
|
| 136 |
|
|
/* Copy word to next comma in string */ |
| 137 |
|
|
static char * |
| 138 |
|
|
tocomma(char *dst, char *src) |
| 139 |
|
|
{ |
| 140 |
|
|
while (*src && *src != ',') |
| 141 |
|
|
*dst++ = *src++; |
| 142 |
|
|
src += (*src == ','); |
| 143 |
|
|
*dst = '\0'; |
| 144 |
|
|
return(src); |
| 145 |
|
|
} |
| 146 |
|
|
|
| 147 |
|
|
/* Use fscanf() to load next date and time from input */ |
| 148 |
|
|
static int |
| 149 |
|
|
scan_date(EPWheader *epw) |
| 150 |
|
|
{ |
| 151 |
|
|
int hour; |
| 152 |
greg |
2.2 |
int minute; |
| 153 |
greg |
2.1 |
|
| 154 |
|
|
++epw->lino; |
| 155 |
|
|
if (epw->isWEA) { /* simpler for WEA input */ |
| 156 |
|
|
epw->dtpos = EPWdateInit; |
| 157 |
|
|
if (fscanf(epw->fp, "%hd %hd %f", &epw->dtpos.month, &epw->dtpos.day, |
| 158 |
|
|
&epw->dtpos.hour) != 3) |
| 159 |
|
|
goto scanerr; |
| 160 |
|
|
epw->dtpos.month--; |
| 161 |
|
|
} else { |
| 162 |
|
|
/* EPW input line */ |
| 163 |
greg |
2.2 |
if (fscanf(epw->fp, "%hd,%hd,%hd,%d,%d,", &epw->dtpos.year, |
| 164 |
greg |
2.1 |
&epw->dtpos.month, &epw->dtpos.day, &hour, &minute) != 5) |
| 165 |
|
|
goto scanerr; |
| 166 |
greg |
2.2 |
epw->dtpos.hour = hour-1; |
| 167 |
|
|
if (epw->period[0].nperhour == 1) |
| 168 |
|
|
epw->dtpos.hour += .5; |
| 169 |
|
|
else |
| 170 |
|
|
epw->dtpos.hour += minute*(1./60.); |
| 171 |
greg |
2.1 |
epw->dtpos.month--; |
| 172 |
|
|
} |
| 173 |
|
|
/* check date/time */ |
| 174 |
|
|
if (!date_OK(&epw->dtpos)) { |
| 175 |
|
|
fputs("Illegal date/time in ", stderr); |
| 176 |
|
|
return(0); |
| 177 |
|
|
} |
| 178 |
|
|
return(1); |
| 179 |
|
|
scanerr: |
| 180 |
|
|
if (!feof(epw->fp)) |
| 181 |
|
|
fputs("Unable to scan date in ", stderr); |
| 182 |
|
|
return(0); |
| 183 |
|
|
} |
| 184 |
|
|
|
| 185 |
|
|
/* Open input file and load header info. */ |
| 186 |
|
|
EPWheader * |
| 187 |
|
|
EPWopen(const char *fname) |
| 188 |
|
|
{ |
| 189 |
|
|
char linbuf[1024], wbuf[64]; |
| 190 |
|
|
char *cp; |
| 191 |
|
|
int n; |
| 192 |
|
|
EPWheader *hdr = (EPWheader *)calloc(1, sizeof(EPWheader)); |
| 193 |
|
|
|
| 194 |
|
|
if (hdr == NULL) |
| 195 |
|
|
goto memerr; |
| 196 |
|
|
if (fname == NULL || !*fname) { |
| 197 |
|
|
fname = "<stdin>"; |
| 198 |
|
|
hdr->fp = stdin; |
| 199 |
|
|
} else if ((hdr->fp = fopen(fname, "r")) == NULL) { |
| 200 |
|
|
perror(fname); |
| 201 |
|
|
free(hdr); |
| 202 |
|
|
return(NULL); |
| 203 |
|
|
} |
| 204 |
|
|
if (!fgets(linbuf, sizeof(linbuf), hdr->fp)) |
| 205 |
|
|
goto readerr; |
| 206 |
|
|
++hdr->lino; |
| 207 |
|
|
if (!strncasecmp(linbuf, "place ", 6)) |
| 208 |
|
|
hdr->isWEA = 1; |
| 209 |
|
|
else if (strncasecmp(linbuf, "LOCATION,", 9)) |
| 210 |
|
|
goto badformat; |
| 211 |
|
|
if (hdr->isWEA) { /* getting WEA header */ |
| 212 |
|
|
cp = linbuf+6; |
| 213 |
|
|
if (sscanf(cp, "%[^_]_%[^\r\n]q", |
| 214 |
|
|
hdr->loc.city, hdr->loc.country) != 2) |
| 215 |
|
|
goto badformat; |
| 216 |
|
|
if (!fgets(linbuf, sizeof(linbuf), hdr->fp)) |
| 217 |
|
|
goto readerr; |
| 218 |
|
|
++hdr->lino; |
| 219 |
|
|
if (sscanf(linbuf, "latitude %lf", &hdr->loc.latitude) != 1) |
| 220 |
|
|
goto badformat; |
| 221 |
|
|
if (!fgets(linbuf, sizeof(linbuf), hdr->fp)) |
| 222 |
|
|
goto readerr; |
| 223 |
|
|
++hdr->lino; |
| 224 |
|
|
if (sscanf(linbuf, "longitude %lf", &hdr->loc.longitude) != 1) |
| 225 |
|
|
goto badformat; |
| 226 |
|
|
hdr->loc.longitude *= -1.; |
| 227 |
|
|
if (!fgets(linbuf, sizeof(linbuf), hdr->fp)) |
| 228 |
|
|
goto readerr; |
| 229 |
|
|
++hdr->lino; |
| 230 |
|
|
if (sscanf(linbuf, "time_zone %f", &hdr->loc.timezone) != 1) |
| 231 |
|
|
goto badformat; |
| 232 |
|
|
hdr->loc.timezone *= -1./15.; |
| 233 |
|
|
if (!fgets(linbuf, sizeof(linbuf), hdr->fp)) |
| 234 |
|
|
goto readerr; |
| 235 |
|
|
++hdr->lino; |
| 236 |
|
|
if (sscanf(linbuf, "site_elevation %f", &hdr->loc.elevation) != 1) |
| 237 |
|
|
goto badformat; |
| 238 |
|
|
if (bad_location(&hdr->loc)) |
| 239 |
|
|
goto badformat; |
| 240 |
|
|
if (!fgets(linbuf, sizeof(linbuf), hdr->fp)) |
| 241 |
|
|
goto readerr; |
| 242 |
|
|
++hdr->lino; |
| 243 |
|
|
if (sscanf(linbuf, "weather_data_file_units %hd", &hdr->isWEA) != 1) |
| 244 |
|
|
goto badformat; |
| 245 |
|
|
hdr->nperiods = 1; |
| 246 |
|
|
hdr->period[0] = EPWperiodInit; |
| 247 |
|
|
hdr->dstart = (int)ftell(hdr->fp); |
| 248 |
|
|
hdr->lin0 = hdr->lino; |
| 249 |
|
|
if (!scan_date(hdr)) /* get date */ |
| 250 |
|
|
goto badformat; |
| 251 |
|
|
return(hdr); |
| 252 |
|
|
} /* else EPW header */ |
| 253 |
|
|
cp = linbuf+9; |
| 254 |
|
|
cp = tocomma(hdr->loc.city, cp); |
| 255 |
|
|
if (!*cp) goto badformat; |
| 256 |
|
|
cp = tocomma(hdr->loc.state, cp); |
| 257 |
|
|
if (!*cp) goto badformat; |
| 258 |
|
|
cp = tocomma(hdr->loc.country, cp); |
| 259 |
|
|
if (!*cp) goto badformat; |
| 260 |
|
|
cp = tocomma(hdr->loc.source, cp); |
| 261 |
|
|
if (!*cp) goto badformat; |
| 262 |
|
|
cp = tocomma(hdr->loc.wmo, cp); |
| 263 |
|
|
if (sscanf(cp, "%lf,%lf,%f,%f", &hdr->loc.latitude, &hdr->loc.longitude, |
| 264 |
|
|
&hdr->loc.timezone, &hdr->loc.elevation) != 4) |
| 265 |
|
|
goto badformat; |
| 266 |
|
|
if (bad_location(&hdr->loc)) |
| 267 |
|
|
goto badformat; |
| 268 |
|
|
if (!fgets(linbuf, sizeof(linbuf), hdr->fp)) |
| 269 |
|
|
goto readerr; |
| 270 |
|
|
++hdr->lino; |
| 271 |
|
|
if (strncasecmp(linbuf, "DESIGN CONDITIONS,", 18)) |
| 272 |
|
|
goto badformat; |
| 273 |
|
|
if (!fgets(linbuf, sizeof(linbuf), hdr->fp)) |
| 274 |
|
|
goto readerr; |
| 275 |
|
|
++hdr->lino; |
| 276 |
|
|
if (strncasecmp(linbuf, "TYPICAL/EXTREME PERIODS,", 24)) |
| 277 |
|
|
goto badformat; |
| 278 |
|
|
if (!fgets(linbuf, sizeof(linbuf), hdr->fp)) |
| 279 |
|
|
goto readerr; |
| 280 |
|
|
++hdr->lino; |
| 281 |
|
|
if (strncasecmp(linbuf, "GROUND TEMPERATURES,", 20)) |
| 282 |
|
|
goto badformat; |
| 283 |
|
|
if (!fgets(linbuf, sizeof(linbuf), hdr->fp)) |
| 284 |
|
|
goto readerr; |
| 285 |
|
|
++hdr->lino; |
| 286 |
|
|
if (strncasecmp(linbuf, "HOLIDAYS/DAYLIGHT SAVINGS,", 26)) |
| 287 |
|
|
goto badformat; |
| 288 |
|
|
if (!fgets(linbuf, sizeof(linbuf), hdr->fp)) |
| 289 |
|
|
goto readerr; |
| 290 |
|
|
++hdr->lino; |
| 291 |
|
|
if (strncasecmp(linbuf, "COMMENTS 1,", 11)) |
| 292 |
|
|
goto badformat; |
| 293 |
|
|
n = strlen(linbuf+11); |
| 294 |
|
|
if (n > 1) { |
| 295 |
|
|
hdr->comments1 = (char *)malloc(n); |
| 296 |
|
|
if (hdr->comments1 == NULL) |
| 297 |
|
|
goto memerr; |
| 298 |
|
|
memcpy(hdr->comments1, linbuf+11, n); |
| 299 |
|
|
hdr->comments1[n] = '\0'; |
| 300 |
|
|
} |
| 301 |
|
|
if (!fgets(linbuf, sizeof(linbuf), hdr->fp)) |
| 302 |
|
|
goto readerr; |
| 303 |
|
|
++hdr->lino; |
| 304 |
|
|
if (strncasecmp(linbuf, "COMMENTS 2,", 11)) |
| 305 |
|
|
goto badformat; |
| 306 |
|
|
n = strlen(linbuf+11); |
| 307 |
|
|
if (n > 1) { |
| 308 |
|
|
hdr->comments2 = (char *)malloc(n); |
| 309 |
|
|
if (hdr->comments2 == NULL) |
| 310 |
|
|
goto memerr; |
| 311 |
|
|
memcpy(hdr->comments2, linbuf+11, n); |
| 312 |
|
|
hdr->comments2[n] = '\0'; |
| 313 |
|
|
} |
| 314 |
|
|
if (!fgets(linbuf, sizeof(linbuf), hdr->fp)) |
| 315 |
|
|
goto readerr; |
| 316 |
|
|
++hdr->lino; |
| 317 |
|
|
if (strncasecmp(linbuf, "DATA PERIODS,", 13)) |
| 318 |
|
|
goto badformat; |
| 319 |
|
|
hdr->nperiods = 1; /* XXX one for now */ |
| 320 |
|
|
if (atoi(linbuf+13) != 1) |
| 321 |
|
|
fprintf(stderr, "%s: warning - ignoring data periods after first\n", |
| 322 |
|
|
fname); |
| 323 |
|
|
cp = strchr(linbuf+13, ','); |
| 324 |
|
|
if (!cp++) goto badformat; |
| 325 |
|
|
if ((hdr->period[0].nperhour = atoi(cp)) <= 0) |
| 326 |
|
|
goto badformat; |
| 327 |
|
|
cp = strchr(cp, ','); |
| 328 |
|
|
if (!cp++) goto badformat; |
| 329 |
|
|
cp = tocomma(hdr->period[0].name, cp); |
| 330 |
|
|
if (!*cp) goto badformat; |
| 331 |
|
|
cp = tocomma(wbuf, cp); |
| 332 |
|
|
if ((hdr->period[0].startday = get_day(wbuf)) < 0) |
| 333 |
|
|
goto badformat; |
| 334 |
|
|
if (!*cp) goto badformat; |
| 335 |
|
|
cp = tocomma(wbuf, cp); |
| 336 |
|
|
if (!get_date(&hdr->period[0].firstdate, wbuf)) |
| 337 |
|
|
goto badformat; |
| 338 |
|
|
if (!*cp) goto badformat; |
| 339 |
|
|
cp = tocomma(wbuf, cp); |
| 340 |
|
|
if (!get_date(&hdr->period[0].lastdate, wbuf)) |
| 341 |
|
|
goto badformat; |
| 342 |
|
|
hdr->period[0].lastdate.hour = 24.f; |
| 343 |
|
|
hdr->dstart = (int)ftell(hdr->fp); |
| 344 |
|
|
hdr->lin0 = hdr->lino; |
| 345 |
|
|
if (!scan_date(hdr)) /* and get/check date */ |
| 346 |
|
|
goto badformat; |
| 347 |
|
|
if ((hdr->dtpos.month != hdr->period[0].firstdate.month) | |
| 348 |
|
|
(hdr->dtpos.day != hdr->period[0].firstdate.day)) |
| 349 |
|
|
fprintf(stderr, "%s: warning - starting date does not match first record\n", |
| 350 |
|
|
fname); |
| 351 |
|
|
return(hdr); /* seems we're good! */ |
| 352 |
|
|
memerr: |
| 353 |
|
|
perror("malloc"); |
| 354 |
|
|
if (hdr) { |
| 355 |
|
|
if (hdr->fp != stdin) fclose(hdr->fp); |
| 356 |
|
|
free(hdr); |
| 357 |
|
|
} |
| 358 |
|
|
return(NULL); |
| 359 |
|
|
readerr: |
| 360 |
|
|
fprintf(stderr, "%s: header read error at line %d\n", fname, hdr->lino); |
| 361 |
|
|
EPWclose(hdr); |
| 362 |
|
|
return(NULL); |
| 363 |
|
|
badformat: |
| 364 |
|
|
fprintf(stderr, "%s: header format error in %s file at line %d\n", |
| 365 |
|
|
fname, hdr->isWEA ? "WEA" : "EPW", hdr->lino); |
| 366 |
|
|
EPWclose(hdr); |
| 367 |
|
|
return(NULL); |
| 368 |
|
|
} |
| 369 |
|
|
|
| 370 |
|
|
/* Seek to a particular data record if we can */ |
| 371 |
|
|
int |
| 372 |
|
|
EPWseek(EPWheader *epw, const EPWdate *dt) |
| 373 |
|
|
{ |
| 374 |
|
|
if (!epw | !dt || !epw->fp || !date_OK(dt)) |
| 375 |
|
|
return(EOF); |
| 376 |
|
|
/* need to back up? */ |
| 377 |
|
|
if (feof(epw->fp) || hour_diff(&epw->dtpos, dt) > 0.99) { |
| 378 |
|
|
if (epw->dstart < 0 || fseek(epw->fp, epw->dstart, SEEK_SET) < 0) { |
| 379 |
|
|
if (epw->fp == stdin) |
| 380 |
|
|
fputs("Cannot seek on standard input\n", stderr); |
| 381 |
|
|
else |
| 382 |
|
|
fprintf(stderr, "Seek error on %s input file\n", |
| 383 |
|
|
epw->isWEA ? "WEA" : "EPW"); |
| 384 |
|
|
return(EOF); |
| 385 |
|
|
} |
| 386 |
|
|
epw->lino = epw->lin0; |
| 387 |
|
|
scan_date(epw); /* assume this much works! */ |
| 388 |
|
|
} |
| 389 |
|
|
/* step through earlier records */ |
| 390 |
|
|
while (hour_diff(&epw->dtpos, dt) < -.99) { |
| 391 |
|
|
int c; |
| 392 |
|
|
while ((c = getc(epw->fp)) != EOF) |
| 393 |
|
|
if (c == '\n') /* skip record data */ |
| 394 |
|
|
break; |
| 395 |
|
|
if (scan_date(epw)) /* load next date/time */ |
| 396 |
|
|
continue; |
| 397 |
|
|
if (feof(epw->fp)) |
| 398 |
|
|
fputs("Requested date/time not found in ", stderr); |
| 399 |
|
|
fputs(epw->isWEA ? "WEA" : "EPW", stderr); |
| 400 |
|
|
fputs(" input\n", stderr); |
| 401 |
|
|
return(0); |
| 402 |
|
|
} |
| 403 |
|
|
return(1); |
| 404 |
|
|
} |
| 405 |
|
|
|
| 406 |
|
|
/* Read the next data record from input */ |
| 407 |
|
|
int |
| 408 |
|
|
EPWread(EPWheader *epw, EPWrecord *rp) |
| 409 |
|
|
{ |
| 410 |
|
|
char linbuf[1024]; |
| 411 |
|
|
char *cp; |
| 412 |
|
|
|
| 413 |
|
|
if (!epw | !rp || feof(epw->fp)) |
| 414 |
|
|
return(EOF); |
| 415 |
|
|
|
| 416 |
|
|
*rp = EPWrecInit; /* initialize to defaults */ |
| 417 |
|
|
rp->date = epw->dtpos; /* date already read in */ |
| 418 |
|
|
if (!fgets(linbuf, sizeof(linbuf), epw->fp)) { |
| 419 |
|
|
fputs("Unexpected EOF on input\n", stderr); |
| 420 |
|
|
return(0); |
| 421 |
|
|
} |
| 422 |
|
|
switch (epw->isWEA) { /* check for WEA input */ |
| 423 |
|
|
case WEAnot: /* nope */ |
| 424 |
|
|
break; |
| 425 |
|
|
case WEAradnorm: /* radiometric w/ direct normal */ |
| 426 |
|
|
if (sscanf(linbuf, "%f %f", &rp->dirirrad, |
| 427 |
|
|
&rp->horizdiffirrad) != 2) |
| 428 |
|
|
goto badformat; |
| 429 |
|
|
break; |
| 430 |
|
|
case WEAradhoriz: /* radiometric w/ direct horizontal */ |
| 431 |
|
|
if (sscanf(linbuf, "%f %f", &rp->globhorizirrad, |
| 432 |
|
|
&rp->horizdiffirrad) != 2) |
| 433 |
|
|
goto badformat; |
| 434 |
|
|
rp->globhorizirrad += rp->horizdiffirrad; |
| 435 |
|
|
break; |
| 436 |
|
|
case WEAphotnorm: /* photometric w/ direct normal */ |
| 437 |
|
|
if (sscanf(linbuf, "%f %f", &rp->dirillum, |
| 438 |
|
|
&rp->diffillum) != 2) |
| 439 |
|
|
goto badformat; |
| 440 |
|
|
break; |
| 441 |
|
|
default: |
| 442 |
|
|
fputs("Illegal WEA data type\n", stderr); |
| 443 |
|
|
return(0); |
| 444 |
|
|
} |
| 445 |
|
|
if (epw->isWEA) { |
| 446 |
|
|
if (sscanf(linbuf, "%*f %*f %f %f", |
| 447 |
|
|
&rp->optdepth, &rp->skycover) == 2) { |
| 448 |
|
|
rp->optdepth *= 1e-3; |
| 449 |
|
|
} |
| 450 |
|
|
if (!scan_date(epw) && !feof(epw->fp)) |
| 451 |
|
|
goto badformat; |
| 452 |
|
|
return(1); |
| 453 |
|
|
} |
| 454 |
|
|
/* continue here if EPW file */ |
| 455 |
|
|
cp = tocomma(rp->uncert, linbuf); |
| 456 |
|
|
if (!*cp) goto badformat; |
| 457 |
|
|
if (*cp != ',') { |
| 458 |
|
|
rp->dbtemp = atof(cp); |
| 459 |
|
|
cp = strchr(cp, ','); |
| 460 |
|
|
} |
| 461 |
|
|
if (!cp++) goto badformat; |
| 462 |
|
|
if (*cp != ',') { |
| 463 |
|
|
rp->dptemp = atof(cp); |
| 464 |
|
|
cp = strchr(cp, ','); |
| 465 |
|
|
} |
| 466 |
|
|
if (!cp++) goto badformat; |
| 467 |
|
|
if (*cp != ',') { |
| 468 |
|
|
rp->humidity = atof(cp); |
| 469 |
|
|
cp = strchr(cp, ','); |
| 470 |
|
|
} |
| 471 |
|
|
if (!cp++) goto badformat; |
| 472 |
|
|
if (*cp != ',') { |
| 473 |
|
|
rp->atmospressure = atof(cp); |
| 474 |
|
|
cp = strchr(cp, ','); |
| 475 |
|
|
} |
| 476 |
|
|
if (!cp++) goto badformat; |
| 477 |
|
|
if (*cp != ',') { |
| 478 |
|
|
rp->exthorizirrad = atof(cp); |
| 479 |
|
|
cp = strchr(cp, ','); |
| 480 |
|
|
} |
| 481 |
|
|
if (!cp++) goto badformat; |
| 482 |
|
|
if (*cp != ',') { |
| 483 |
|
|
rp->extdirirrad = atof(cp); |
| 484 |
|
|
cp = strchr(cp, ','); |
| 485 |
|
|
} |
| 486 |
|
|
if (!cp++) goto badformat; |
| 487 |
|
|
if (*cp != ',') { |
| 488 |
|
|
rp->horizirrad_ir = atof(cp); |
| 489 |
|
|
cp = strchr(cp, ','); |
| 490 |
|
|
} |
| 491 |
|
|
if (!cp++) goto badformat; |
| 492 |
|
|
if (*cp != ',') { |
| 493 |
|
|
rp->globhorizirrad = atof(cp); |
| 494 |
|
|
cp = strchr(cp, ','); |
| 495 |
|
|
} |
| 496 |
|
|
if (!cp++) goto badformat; |
| 497 |
|
|
if (*cp != ',') { |
| 498 |
|
|
rp->dirirrad = atof(cp); |
| 499 |
|
|
cp = strchr(cp, ','); |
| 500 |
|
|
} |
| 501 |
|
|
if (!cp++) goto badformat; |
| 502 |
|
|
if (*cp != ',') { |
| 503 |
|
|
rp->horizdiffirrad = atof(cp); |
| 504 |
|
|
cp = strchr(cp, ','); |
| 505 |
|
|
} |
| 506 |
|
|
if (!cp++) goto badformat; |
| 507 |
|
|
if (*cp != ',') { |
| 508 |
|
|
rp->globhorizillum = atof(cp); |
| 509 |
|
|
if (rp->globhorizillum >= 999900.f) |
| 510 |
|
|
rp->globhorizillum = EPWrecInit.globhorizillum; |
| 511 |
|
|
cp = strchr(cp, ','); |
| 512 |
|
|
} |
| 513 |
|
|
if (!cp++) goto badformat; |
| 514 |
|
|
if (*cp != ',') { |
| 515 |
|
|
rp->diffillum = atof(cp); |
| 516 |
|
|
if (rp->diffillum >= 999900.f) |
| 517 |
|
|
rp->diffillum = EPWrecInit.diffillum; |
| 518 |
|
|
cp = strchr(cp, ','); |
| 519 |
|
|
} |
| 520 |
|
|
if (!cp++) goto badformat; |
| 521 |
|
|
if (*cp != ',') { |
| 522 |
|
|
rp->dirillum = atof(cp); |
| 523 |
|
|
if (rp->dirillum >= 999900.f) |
| 524 |
|
|
rp->dirillum = EPWrecInit.dirillum; |
| 525 |
|
|
cp = strchr(cp, ','); |
| 526 |
|
|
} |
| 527 |
|
|
if (!cp++) goto badformat; |
| 528 |
|
|
if (*cp != ',') { |
| 529 |
|
|
rp->zenlum = atof(cp); |
| 530 |
|
|
if (rp->zenlum >= 9999.f) |
| 531 |
|
|
rp->zenlum = EPWrecInit.zenlum; |
| 532 |
|
|
cp = strchr(cp, ','); |
| 533 |
|
|
} |
| 534 |
|
|
if (!cp++) goto badformat; |
| 535 |
|
|
if (*cp != ',') { |
| 536 |
|
|
rp->windirection = atof(cp); |
| 537 |
|
|
cp = strchr(cp, ','); |
| 538 |
|
|
} |
| 539 |
|
|
if (!cp++) goto badformat; |
| 540 |
|
|
if (*cp != ',') { |
| 541 |
|
|
rp->windspeed = atof(cp); |
| 542 |
|
|
cp = strchr(cp, ','); |
| 543 |
|
|
} |
| 544 |
|
|
if (!cp++) goto badformat; |
| 545 |
|
|
if (*cp != ',') { |
| 546 |
|
|
rp->skycover = atof(cp) * 0.1; |
| 547 |
|
|
cp = strchr(cp, ','); |
| 548 |
|
|
} |
| 549 |
|
|
if (!cp++) goto badformat; |
| 550 |
|
|
if (*cp != ',') { |
| 551 |
|
|
rp->opskycover = atof(cp) * 0.1; |
| 552 |
|
|
cp = strchr(cp, ','); |
| 553 |
|
|
} |
| 554 |
|
|
if (!cp++) goto badformat; |
| 555 |
|
|
if (*cp != ',') { |
| 556 |
|
|
rp->visibility = atof(cp) * 1000.; |
| 557 |
|
|
cp = strchr(cp, ','); |
| 558 |
|
|
} |
| 559 |
|
|
if (!cp++) goto badformat; |
| 560 |
|
|
if (*cp != ',') { |
| 561 |
|
|
rp->ceilheight = atof(cp); |
| 562 |
|
|
cp = strchr(cp, ','); |
| 563 |
|
|
} |
| 564 |
|
|
if (!cp++) goto badformat; |
| 565 |
|
|
cp = strchr(cp, ','); |
| 566 |
|
|
if (!cp++) goto badformat; |
| 567 |
|
|
cp = strchr(cp, ','); |
| 568 |
|
|
if (!cp++) goto badformat; |
| 569 |
|
|
if (*cp != ',') { |
| 570 |
|
|
rp->precip = atof(cp) * 1e-3; |
| 571 |
|
|
cp = strchr(cp, ','); |
| 572 |
|
|
} |
| 573 |
|
|
if (!cp++) goto badformat; |
| 574 |
|
|
if (*cp != ',') { |
| 575 |
|
|
rp->optdepth = atof(cp) * 1e-3; |
| 576 |
|
|
cp = strchr(cp, ','); |
| 577 |
|
|
} |
| 578 |
|
|
if (!cp++) goto badformat; |
| 579 |
|
|
if (*cp != ',') { |
| 580 |
|
|
rp->snowdepth = atof(cp) * 1e-2; |
| 581 |
|
|
cp = strchr(cp, ','); |
| 582 |
|
|
} |
| 583 |
|
|
if (!cp++) goto badformat; |
| 584 |
|
|
if (*cp != ',') { |
| 585 |
|
|
rp->nosnowdays = atoi(cp); |
| 586 |
|
|
cp = strchr(cp, ','); |
| 587 |
|
|
} |
| 588 |
|
|
if (!cp++) goto badformat; |
| 589 |
|
|
if (*cp != ',') { |
| 590 |
|
|
rp->albedo = atof(cp); |
| 591 |
|
|
cp = strchr(cp, ','); |
| 592 |
|
|
} |
| 593 |
|
|
if (!cp++) goto badformat; |
| 594 |
|
|
if (*cp != ',') { |
| 595 |
|
|
rp->liqpdepth = atof(cp) * 1e-3; |
| 596 |
|
|
cp = strchr(cp, ','); |
| 597 |
|
|
} |
| 598 |
|
|
if (!cp++) goto badformat; |
| 599 |
|
|
if ((*cp != ',') & (*cp != '\n')) |
| 600 |
|
|
rp->liqhours = atof(cp); |
| 601 |
|
|
if (scan_date(epw) || feof(epw->fp)) |
| 602 |
|
|
return(1); /* normal return (even if next is EOF) */ |
| 603 |
|
|
badformat: |
| 604 |
|
|
fprintf(stderr, "%s file, format error at line %d\n", |
| 605 |
|
|
epw->isWEA ? "WEA" : "EPW", epw->lino); |
| 606 |
|
|
return(0); |
| 607 |
|
|
} |
| 608 |
|
|
|
| 609 |
|
|
/* Close input and free header data */ |
| 610 |
|
|
void |
| 611 |
|
|
EPWclose(EPWheader *epw) |
| 612 |
|
|
{ |
| 613 |
|
|
if (!epw) return; |
| 614 |
|
|
if (epw->fp != stdin) fclose(epw->fp); |
| 615 |
|
|
if (epw->comments1) free(epw->comments1); |
| 616 |
|
|
if (epw->comments2) free(epw->comments2); |
| 617 |
|
|
free(epw); |
| 618 |
|
|
return; |
| 619 |
|
|
} |
| 620 |
|
|
|
| 621 |
|
|
#ifdef TEST_MAIN |
| 622 |
|
|
int |
| 623 |
|
|
main(int argc, char *argv[]) |
| 624 |
|
|
{ |
| 625 |
|
|
EPWheader *epw = EPWopen(argv[1]); |
| 626 |
|
|
EPWrecord erec; |
| 627 |
|
|
int rval; |
| 628 |
|
|
|
| 629 |
|
|
if (!epw) return(1); |
| 630 |
|
|
|
| 631 |
|
|
printf("Weather input file type is %d\n", epw->isWEA); |
| 632 |
|
|
printf("Location is %s, %s\n", epw->loc.city, epw->loc.country); |
| 633 |
|
|
printf("Time zone is %.2f hours from GMT\n", epw->loc.timezone); |
| 634 |
|
|
printf("Latitude, longitude is (%.8f,%.8f) degrees (N,E)\n", |
| 635 |
|
|
epw->loc.latitude, epw->loc.longitude); |
| 636 |
|
|
printf("Elevation is %.0f meters\n", epw->loc.elevation); |
| 637 |
|
|
printf("'%s' starts %d/%d on a %s and ends %d/%d\n", epw->period[0].name, |
| 638 |
|
|
epw->period[0].firstdate.month+1, epw->period[0].firstdate.day, |
| 639 |
|
|
WDname[epw->period[0].startday], |
| 640 |
|
|
epw->period[0].lastdate.month+1, epw->period[0].lastdate.day); |
| 641 |
|
|
while ((rval = EPWread(epw, &erec)) > 0) { |
| 642 |
|
|
printf("Weather record for %d/%d/%d @ %.2f hours:\n", erec.date.month+1, |
| 643 |
|
|
erec.date.day, erec.date.year, erec.date.hour); |
| 644 |
|
|
if (EPWisset(&erec,dbtemp)) |
| 645 |
|
|
printf("\tDry bulb temp: %.1f °C\n", erec.dbtemp); |
| 646 |
|
|
if (EPWisset(&erec,dptemp)) |
| 647 |
|
|
printf("\tDew point temp: %.1f °C\n", erec.dptemp); |
| 648 |
|
|
if (EPWisset(&erec,humidity)) |
| 649 |
|
|
printf("\tHumidity: %.1f%%\n", erec.humidity); |
| 650 |
|
|
if (EPWisset(&erec,atmospressure)) |
| 651 |
|
|
printf("\tAtmospheric pressure: %.0f Pa\n", erec.atmospressure); |
| 652 |
|
|
if (EPWisset(&erec,exthorizirrad)) |
| 653 |
|
|
printf("\tExtraterrestrial horiz irrad: %.1f w/m2\n", erec.exthorizirrad); |
| 654 |
|
|
if (EPWisset(&erec,horizirrad_ir)) |
| 655 |
|
|
printf("\tInfrared direct normal irrad: %.1f w/m2\n", erec.horizirrad_ir); |
| 656 |
|
|
if (EPWisset(&erec,globhorizirrad)) |
| 657 |
|
|
printf("\tGlobal horiz irrad: %.1f w/m2\n", erec.globhorizirrad); |
| 658 |
|
|
if (EPWisset(&erec,dirirrad)) |
| 659 |
|
|
printf("\tDirect normal irrad: %.1f w/m2\n", erec.dirirrad); |
| 660 |
|
|
if (EPWisset(&erec,horizdiffirrad)) |
| 661 |
|
|
printf("\tHorizontal diffuse irrad: %.1f w/m2\n", erec.horizdiffirrad); |
| 662 |
|
|
if (EPWisset(&erec,globhorizillum)) |
| 663 |
|
|
printf("\tGlobal horizontal illuminance: %.0f lux\n", erec.globhorizillum); |
| 664 |
|
|
if (EPWisset(&erec,diffillum)) |
| 665 |
|
|
printf("\tDiffuse horizontal illuminance: %.0f lux\n", erec.diffillum); |
| 666 |
|
|
if (EPWisset(&erec,dirillum)) |
| 667 |
|
|
printf("\tDirect normal illuminance: %.0f lux\n", erec.dirillum); |
| 668 |
|
|
if (EPWisset(&erec,zenlum)) |
| 669 |
|
|
printf("\tZenith luminance: %.0f nits\n", erec.zenlum); |
| 670 |
|
|
if (EPWisset(&erec,windirection)) |
| 671 |
|
|
printf("\tWind direction: %.1f °E of S\n", erec.windirection); |
| 672 |
|
|
if (EPWisset(&erec,windspeed)) |
| 673 |
|
|
printf("\tWind speed: %.2f m/s\n", erec.windspeed); |
| 674 |
|
|
if (EPWisset(&erec,skycover)) |
| 675 |
|
|
printf("\tSky cover fraction: %.3f\n", erec.skycover); |
| 676 |
|
|
if (EPWisset(&erec,opskycover)) |
| 677 |
|
|
printf("\tOpaque sky cover fraction: %.3f\n", erec.opskycover); |
| 678 |
|
|
if (EPWisset(&erec,visibility)) |
| 679 |
|
|
printf("\tVisibility: %.0f meters\n", erec.visibility); |
| 680 |
|
|
if (EPWisset(&erec,ceilheight)) |
| 681 |
|
|
printf("\tCloud ceiling height: %.0f meters\n", erec.ceilheight); |
| 682 |
|
|
if (EPWisset(&erec,precip)) |
| 683 |
|
|
printf("\tPrecipitation: %f meters\n", erec.precip); |
| 684 |
|
|
if (EPWisset(&erec,optdepth)) |
| 685 |
|
|
printf("\tAerosol optical depth: %.4f\n", erec.optdepth); |
| 686 |
|
|
if (EPWisset(&erec,snowdepth)) |
| 687 |
|
|
printf("\tSnow depth: %.2f meters\n", erec.snowdepth); |
| 688 |
|
|
if (EPWisset(&erec,nosnowdays)) |
| 689 |
|
|
printf("\tDays since last snow: %d\n", erec.nosnowdays); |
| 690 |
|
|
if (EPWisset(&erec,albedo)) |
| 691 |
|
|
printf("\tAlbedo: %.4f\n", erec.albedo); |
| 692 |
|
|
if (EPWisset(&erec,liqpdepth)) |
| 693 |
|
|
printf("\tLiquid precipitation depth: %.6f meters\n", erec.liqpdepth); |
| 694 |
|
|
if (EPWisset(&erec,liqhours)) |
| 695 |
|
|
printf("\tLiquid precipitation time: %.1f hours\n", erec.liqhours); |
| 696 |
|
|
} |
| 697 |
|
|
EPWclose(epw); |
| 698 |
|
|
return(!rval); |
| 699 |
|
|
} |
| 700 |
|
|
#endif /* TEST_MAIN */ |
