| File: | weather-metar.c |
| Warning: | line 177, column 28 This statement is never executed |
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| 1 | /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 4 -*- */ |
| 2 | /* weather-metar.c - Weather server functions (METAR) |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License as |
| 6 | * published by the Free Software Foundation; either version 2 of the |
| 7 | * License, or (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, but |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, see |
| 16 | * <http://www.gnu.org/licenses/>. |
| 17 | */ |
| 18 | |
| 19 | #ifdef HAVE_CONFIG_H1 |
| 20 | #include <config.h> |
| 21 | #endif |
| 22 | |
| 23 | #include <stdlib.h> |
| 24 | #include <string.h> |
| 25 | #include <sys/types.h> |
| 26 | #include <regex.h> |
| 27 | |
| 28 | #define CAFEWEATHER_I_KNOW_THIS_IS_UNSTABLE |
| 29 | #include "weather.h" |
| 30 | #include "weather-priv.h" |
| 31 | |
| 32 | enum { |
| 33 | TIME_RE, |
| 34 | WIND_RE, |
| 35 | VIS_RE, |
| 36 | COND_RE, |
| 37 | CLOUD_RE, |
| 38 | TEMP_RE, |
| 39 | PRES_RE, |
| 40 | |
| 41 | RE_NUM |
| 42 | }; |
| 43 | |
| 44 | /* Return time of weather report as secs since epoch UTC */ |
| 45 | static time_t |
| 46 | make_time (gint utcDate, gint utcHour, gint utcMin) |
| 47 | { |
| 48 | const time_t now = time (NULL((void*)0)); |
| 49 | struct tm tm; |
| 50 | |
| 51 | localtime_r (&now, &tm); |
| 52 | |
| 53 | /* If last reading took place just before midnight UTC on the |
| 54 | * first, adjust the date downward to allow for the month |
| 55 | * change-over. This ASSUMES that the reading won't be more than |
| 56 | * 24 hrs old! */ |
| 57 | if ((utcDate > tm.tm_mday) && (tm.tm_mday == 1)) { |
| 58 | tm.tm_mday = 0; /* mktime knows this is the last day of the previous |
| 59 | * month. */ |
| 60 | } else { |
| 61 | tm.tm_mday = utcDate; |
| 62 | } |
| 63 | tm.tm_hour = utcHour; |
| 64 | tm.tm_min = utcMin; |
| 65 | tm.tm_sec = 0; |
| 66 | |
| 67 | /* mktime() assumes value is local, not UTC. Use tm_gmtoff to compensate */ |
| 68 | #ifdef HAVE_TM_TM_GMOFF1 |
| 69 | return tm.tm_gmtoff + mktime (&tm); |
| 70 | #elif defined HAVE_TIMEZONE |
| 71 | return timezone + mktime (&tm); |
| 72 | #endif |
| 73 | } |
| 74 | |
| 75 | static void |
| 76 | metar_tok_time (gchar *tokp, WeatherInfo *info) |
| 77 | { |
| 78 | gint day, hr, min; |
| 79 | |
| 80 | sscanf (tokp, "%2u%2u%2u", &day, &hr, &min); |
| 81 | info->update = make_time (day, hr, min); |
| 82 | } |
| 83 | |
| 84 | static void |
| 85 | metar_tok_wind (gchar *tokp, WeatherInfo *info) |
| 86 | { |
| 87 | gchar sdir[4], sspd[4], sgust[4]; |
| 88 | gint dir, spd = -1; |
| 89 | gchar *gustp; |
| 90 | size_t glen; |
| 91 | |
| 92 | strncpy (sdir, tokp, 3); |
| 93 | sdir[3] = 0; |
| 94 | dir = (!strcmp (sdir, "VRB")) ? -1 : atoi (sdir); |
| 95 | |
| 96 | memset (sspd, 0, sizeof (sspd)); |
| 97 | glen = strspn (tokp + 3, CONST_DIGITS"0123456789"); |
| 98 | strncpy (sspd, tokp + 3, glen); |
| 99 | spd = atoi (sspd); |
| 100 | tokp += glen + 3; |
| 101 | |
| 102 | gustp = strchr (tokp, 'G'); |
| 103 | if (gustp) { |
| 104 | memset (sgust, 0, sizeof (sgust)); |
| 105 | glen = strspn (gustp + 1, CONST_DIGITS"0123456789"); |
| 106 | strncpy (sgust, gustp + 1, glen); |
| 107 | tokp = gustp + 1 + glen; |
| 108 | } |
| 109 | |
| 110 | if (!strcmp (tokp, "MPS")) |
| 111 | info->windspeed = WINDSPEED_MS_TO_KNOTS ((WeatherWindSpeed)spd)(((WeatherWindSpeed)spd) / 0.514444); |
| 112 | else |
| 113 | info->windspeed = (WeatherWindSpeed)spd; |
| 114 | |
| 115 | if ((349 <= dir) || (dir <= 11)) |
| 116 | info->wind = WIND_N; |
| 117 | else if ((12 <= dir) && (dir <= 33)) |
| 118 | info->wind = WIND_NNE; |
| 119 | else if ((34 <= dir) && (dir <= 56)) |
| 120 | info->wind = WIND_NE; |
| 121 | else if ((57 <= dir) && (dir <= 78)) |
| 122 | info->wind = WIND_ENE; |
| 123 | else if ((79 <= dir) && (dir <= 101)) |
| 124 | info->wind = WIND_E; |
| 125 | else if ((102 <= dir) && (dir <= 123)) |
| 126 | info->wind = WIND_ESE; |
| 127 | else if ((124 <= dir) && (dir <= 146)) |
| 128 | info->wind = WIND_SE; |
| 129 | else if ((147 <= dir) && (dir <= 168)) |
| 130 | info->wind = WIND_SSE; |
| 131 | else if ((169 <= dir) && (dir <= 191)) |
| 132 | info->wind = WIND_S; |
| 133 | else if ((192 <= dir) && (dir <= 213)) |
| 134 | info->wind = WIND_SSW; |
| 135 | else if ((214 <= dir) && (dir <= 236)) |
| 136 | info->wind = WIND_SW; |
| 137 | else if ((237 <= dir) && (dir <= 258)) |
| 138 | info->wind = WIND_WSW; |
| 139 | else if ((259 <= dir) && (dir <= 281)) |
| 140 | info->wind = WIND_W; |
| 141 | else if ((282 <= dir) && (dir <= 303)) |
| 142 | info->wind = WIND_WNW; |
| 143 | else if ((304 <= dir) && (dir <= 326)) |
| 144 | info->wind = WIND_NW; |
| 145 | else if ((327 <= dir) && (dir <= 348)) |
| 146 | info->wind = WIND_NNW; |
| 147 | } |
| 148 | |
| 149 | static void |
| 150 | metar_tok_vis (gchar *tokp, WeatherInfo *info) |
| 151 | { |
| 152 | gchar *pfrac, *pend, *psp; |
| 153 | gchar sval[6]; |
| 154 | gint num, den, val; |
| 155 | |
| 156 | memset (sval, 0, sizeof (sval)); |
| 157 | |
| 158 | if (!strcmp (tokp,"CAVOK")) { |
| 159 | // "Ceiling And Visibility OK": visibility >= 10 KM |
| 160 | info->visibility=10000. / VISIBILITY_SM_TO_M (1.)(((1.) * 1.609344) * 1000); |
| 161 | info->sky = SKY_CLEAR; |
| 162 | } else if (0 != (pend = strstr (tokp, "SM"))) { |
| 163 | // US observation: field ends with "SM" |
| 164 | pfrac = strchr (tokp, '/'); |
| 165 | if (pfrac) { |
| 166 | if (*tokp == 'M') { |
| 167 | info->visibility = 0.001; |
| 168 | } else { |
| 169 | num = (*(pfrac - 1) - '0'); |
| 170 | strncpy (sval, pfrac + 1, pend - pfrac - 1); |
| 171 | den = atoi (sval); |
| 172 | info->visibility = |
| 173 | ((WeatherVisibility)num / ((WeatherVisibility)den)); |
| 174 | |
| 175 | psp = strchr (tokp, ' '); |
| 176 | if (psp) { |
| 177 | *psp = '\0'; |
This statement is never executed | |
| 178 | val = atoi (tokp); |
| 179 | info->visibility += (WeatherVisibility)val; |
| 180 | } |
| 181 | } |
| 182 | } else { |
| 183 | strncpy (sval, tokp, pend - tokp); |
| 184 | val = atoi (sval); |
| 185 | info->visibility = (WeatherVisibility)val; |
| 186 | } |
| 187 | } else { |
| 188 | // International observation: NNNN(DD NNNNDD)? |
| 189 | // For now: use only the minimum visibility and ignore its direction |
| 190 | strncpy (sval, tokp, strspn (tokp, CONST_DIGITS"0123456789")); |
| 191 | val = atoi (sval); |
| 192 | info->visibility = (WeatherVisibility)val / VISIBILITY_SM_TO_M (1.)(((1.) * 1.609344) * 1000); |
| 193 | } |
| 194 | } |
| 195 | |
| 196 | static void |
| 197 | metar_tok_cloud (gchar *tokp, WeatherInfo *info) |
| 198 | { |
| 199 | gchar stype[4], salt[4]; |
| 200 | |
| 201 | strncpy (stype, tokp, 3); |
| 202 | stype[3] = 0; |
| 203 | if (strlen (tokp) == 6) { |
| 204 | strncpy (salt, tokp + 3, 3); |
| 205 | salt[3] = 0; |
| 206 | } |
| 207 | |
| 208 | if (!strcmp (stype, "CLR")) { |
| 209 | info->sky = SKY_CLEAR; |
| 210 | } else if (!strcmp (stype, "SKC")) { |
| 211 | info->sky = SKY_CLEAR; |
| 212 | } else if (!strcmp (stype, "NSC")) { |
| 213 | info->sky = SKY_CLEAR; |
| 214 | } else if (!strcmp (stype, "BKN")) { |
| 215 | info->sky = SKY_BROKEN; |
| 216 | } else if (!strcmp (stype, "SCT")) { |
| 217 | info->sky = SKY_SCATTERED; |
| 218 | } else if (!strcmp (stype, "FEW")) { |
| 219 | info->sky = SKY_FEW; |
| 220 | } else if (!strcmp (stype, "OVC")) { |
| 221 | info->sky = SKY_OVERCAST; |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | static void |
| 226 | metar_tok_pres (gchar *tokp, WeatherInfo *info) |
| 227 | { |
| 228 | if (*tokp == 'A') { |
| 229 | gchar sintg[3], sfract[3]; |
| 230 | gint intg, fract; |
| 231 | |
| 232 | strncpy (sintg, tokp + 1, 2); |
| 233 | sintg[2] = 0; |
| 234 | intg = atoi (sintg); |
| 235 | |
| 236 | strncpy (sfract, tokp + 3, 2); |
| 237 | sfract[2] = 0; |
| 238 | fract = atoi (sfract); |
| 239 | |
| 240 | info->pressure = (WeatherPressure)intg + (((WeatherPressure)fract)/100.0); |
| 241 | } else { /* *tokp == 'Q' */ |
| 242 | gchar spres[5]; |
| 243 | gint pres; |
| 244 | |
| 245 | strncpy (spres, tokp + 1, 4); |
| 246 | spres[4] = 0; |
| 247 | pres = atoi (spres); |
| 248 | |
| 249 | info->pressure = PRESSURE_MBAR_TO_INCH ((WeatherPressure)pres)(((WeatherPressure)pres) * 0.029533373); |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | static void |
| 254 | metar_tok_temp (gchar *tokp, WeatherInfo *info) |
| 255 | { |
| 256 | gchar *ptemp, *pdew, *psep; |
| 257 | |
| 258 | psep = strchr (tokp, '/'); |
| 259 | *psep = 0; |
| 260 | ptemp = tokp; |
| 261 | pdew = psep + 1; |
| 262 | |
| 263 | info->temp = (*ptemp == 'M') ? TEMP_C_TO_F (-atoi (ptemp + 1))(((-atoi (ptemp + 1)) * 1.8) + 32.0) |
| 264 | : TEMP_C_TO_F (atoi (ptemp))(((atoi (ptemp)) * 1.8) + 32.0); |
| 265 | if (*pdew) { |
| 266 | info->dew = (*pdew == 'M') ? TEMP_C_TO_F (-atoi (pdew + 1))(((-atoi (pdew + 1)) * 1.8) + 32.0) |
| 267 | : TEMP_C_TO_F (atoi (pdew))(((atoi (pdew)) * 1.8) + 32.0); |
| 268 | } else { |
| 269 | info->dew = -1000.0; |
| 270 | } |
| 271 | } |
| 272 | |
| 273 | static void |
| 274 | metar_tok_cond (gchar *tokp, WeatherInfo *info) |
| 275 | { |
| 276 | gchar squal[3], sphen[4]; |
| 277 | gchar *pphen; |
| 278 | |
| 279 | if ((strlen (tokp) > 3) && ((*tokp == '+') || (*tokp == '-'))) |
| 280 | ++tokp; /* FIX */ |
| 281 | |
| 282 | if ((*tokp == '+') || (*tokp == '-')) |
| 283 | pphen = tokp + 1; |
| 284 | else if (strlen (tokp) < 4) |
| 285 | pphen = tokp; |
| 286 | else |
| 287 | pphen = tokp + 2; |
| 288 | |
| 289 | memset (squal, 0, sizeof (squal)); |
| 290 | strncpy (squal, tokp, pphen - tokp); |
| 291 | squal[pphen - tokp] = 0; |
| 292 | |
| 293 | memset (sphen, 0, sizeof (sphen)); |
| 294 | strncpy (sphen, pphen, sizeof (sphen)); |
| 295 | sphen[sizeof (sphen)-1] = '\0'; |
| 296 | |
| 297 | /* Defaults */ |
| 298 | info->cond.qualifier = QUALIFIER_NONE; |
| 299 | info->cond.phenomenon = PHENOMENON_NONE; |
| 300 | info->cond.significant = FALSE(0); |
| 301 | |
| 302 | if (!strcmp (squal, "")) { |
| 303 | info->cond.qualifier = QUALIFIER_MODERATE; |
| 304 | } else if (!strcmp (squal, "-")) { |
| 305 | info->cond.qualifier = QUALIFIER_LIGHT; |
| 306 | } else if (!strcmp (squal, "+")) { |
| 307 | info->cond.qualifier = QUALIFIER_HEAVY; |
| 308 | } else if (!strcmp (squal, "VC")) { |
| 309 | info->cond.qualifier = QUALIFIER_VICINITY; |
| 310 | } else if (!strcmp (squal, "MI")) { |
| 311 | info->cond.qualifier = QUALIFIER_SHALLOW; |
| 312 | } else if (!strcmp (squal, "BC")) { |
| 313 | info->cond.qualifier = QUALIFIER_PATCHES; |
| 314 | } else if (!strcmp (squal, "PR")) { |
| 315 | info->cond.qualifier = QUALIFIER_PARTIAL; |
| 316 | } else if (!strcmp (squal, "TS")) { |
| 317 | info->cond.qualifier = QUALIFIER_THUNDERSTORM; |
| 318 | } else if (!strcmp (squal, "BL")) { |
| 319 | info->cond.qualifier = QUALIFIER_BLOWING; |
| 320 | } else if (!strcmp (squal, "SH")) { |
| 321 | info->cond.qualifier = QUALIFIER_SHOWERS; |
| 322 | } else if (!strcmp (squal, "DR")) { |
| 323 | info->cond.qualifier = QUALIFIER_DRIFTING; |
| 324 | } else if (!strcmp (squal, "FZ")) { |
| 325 | info->cond.qualifier = QUALIFIER_FREEZING; |
| 326 | } else { |
| 327 | return; |
| 328 | } |
| 329 | |
| 330 | if (!strcmp (sphen, "DZ")) { |
| 331 | info->cond.phenomenon = PHENOMENON_DRIZZLE; |
| 332 | } else if (!strcmp (sphen, "RA")) { |
| 333 | info->cond.phenomenon = PHENOMENON_RAIN; |
| 334 | } else if (!strcmp (sphen, "SN")) { |
| 335 | info->cond.phenomenon = PHENOMENON_SNOW; |
| 336 | } else if (!strcmp (sphen, "SG")) { |
| 337 | info->cond.phenomenon = PHENOMENON_SNOW_GRAINS; |
| 338 | } else if (!strcmp (sphen, "IC")) { |
| 339 | info->cond.phenomenon = PHENOMENON_ICE_CRYSTALS; |
| 340 | } else if (!strcmp (sphen, "PE")) { |
| 341 | info->cond.phenomenon = PHENOMENON_ICE_PELLETS; |
| 342 | } else if (!strcmp (sphen, "GR")) { |
| 343 | info->cond.phenomenon = PHENOMENON_HAIL; |
| 344 | } else if (!strcmp (sphen, "GS")) { |
| 345 | info->cond.phenomenon = PHENOMENON_SMALL_HAIL; |
| 346 | } else if (!strcmp (sphen, "UP")) { |
| 347 | info->cond.phenomenon = PHENOMENON_UNKNOWN_PRECIPITATION; |
| 348 | } else if (!strcmp (sphen, "BR")) { |
| 349 | info->cond.phenomenon = PHENOMENON_MIST; |
| 350 | } else if (!strcmp (sphen, "FG")) { |
| 351 | info->cond.phenomenon = PHENOMENON_FOG; |
| 352 | } else if (!strcmp (sphen, "FU")) { |
| 353 | info->cond.phenomenon = PHENOMENON_SMOKE; |
| 354 | } else if (!strcmp (sphen, "VA")) { |
| 355 | info->cond.phenomenon = PHENOMENON_VOLCANIC_ASH; |
| 356 | } else if (!strcmp (sphen, "SA")) { |
| 357 | info->cond.phenomenon = PHENOMENON_SAND; |
| 358 | } else if (!strcmp (sphen, "HZ")) { |
| 359 | info->cond.phenomenon = PHENOMENON_HAZE; |
| 360 | } else if (!strcmp (sphen, "PY")) { |
| 361 | info->cond.phenomenon = PHENOMENON_SPRAY; |
| 362 | } else if (!strcmp (sphen, "DU")) { |
| 363 | info->cond.phenomenon = PHENOMENON_DUST; |
| 364 | } else if (!strcmp (sphen, "SQ")) { |
| 365 | info->cond.phenomenon = PHENOMENON_SQUALL; |
| 366 | } else if (!strcmp (sphen, "SS")) { |
| 367 | info->cond.phenomenon = PHENOMENON_SANDSTORM; |
| 368 | } else if (!strcmp (sphen, "DS")) { |
| 369 | info->cond.phenomenon = PHENOMENON_DUSTSTORM; |
| 370 | } else if (!strcmp (sphen, "PO")) { |
| 371 | info->cond.phenomenon = PHENOMENON_DUST_WHIRLS; |
| 372 | } else if (!strcmp (sphen, "+FC")) { |
| 373 | info->cond.phenomenon = PHENOMENON_TORNADO; |
| 374 | } else if (!strcmp (sphen, "FC")) { |
| 375 | info->cond.phenomenon = PHENOMENON_FUNNEL_CLOUD; |
| 376 | } else { |
| 377 | return; |
| 378 | } |
| 379 | |
| 380 | if ((info->cond.qualifier != QUALIFIER_NONE) || (info->cond.phenomenon != PHENOMENON_NONE)) |
| 381 | info->cond.significant = TRUE(!(0)); |
| 382 | } |
| 383 | |
| 384 | #define TIME_RE_STR"([0-9]{6})Z" "([0-9]{6})Z" |
| 385 | #define WIND_RE_STR"(([0-9]{3})|VRB)([0-9]?[0-9]{2})(G[0-9]?[0-9]{2})?(KT|MPS)" "(([0-9]{3})|VRB)([0-9]?[0-9]{2})(G[0-9]?[0-9]{2})?(KT|MPS)" |
| 386 | #define VIS_RE_STR"((([0-9]?[0-9])|(M?([12] )?([1357]/1?[0-9])))SM)|" "([0-9]{4}(N|NE|E|SE|S|SW|W|NW( [0-9]{4}(N|NE|E|SE|S|SW|W|NW))?)?)|" "CAVOK" "((([0-9]?[0-9])|(M?([12] )?([1357]/1?[0-9])))SM)|" \ |
| 387 | "([0-9]{4}(N|NE|E|SE|S|SW|W|NW( [0-9]{4}(N|NE|E|SE|S|SW|W|NW))?)?)|" \ |
| 388 | "CAVOK" |
| 389 | #define COND_RE_STR"(-|\\+)?(VC|MI|BC|PR|TS|BL|SH|DR|FZ)?(DZ|RA|SN|SG|IC|PE|GR|GS|UP|BR|FG|FU|VA|SA|HZ|PY|DU|SQ|SS|DS|PO|\\+?FC)" "(-|\\+)?(VC|MI|BC|PR|TS|BL|SH|DR|FZ)?(DZ|RA|SN|SG|IC|PE|GR|GS|UP|BR|FG|FU|VA|SA|HZ|PY|DU|SQ|SS|DS|PO|\\+?FC)" |
| 390 | #define CLOUD_RE_STR"((CLR|BKN|SCT|FEW|OVC|SKC|NSC)([0-9]{3}|///)?(CB|TCU|///)?)" "((CLR|BKN|SCT|FEW|OVC|SKC|NSC)([0-9]{3}|///)?(CB|TCU|///)?)" |
| 391 | #define TEMP_RE_STR"(M?[0-9][0-9])/(M?(//|[0-9][0-9])?)" "(M?[0-9][0-9])/(M?(//|[0-9][0-9])?)" |
| 392 | #define PRES_RE_STR"(A|Q)([0-9]{4})" "(A|Q)([0-9]{4})" |
| 393 | |
| 394 | /* POSIX regular expressions do not allow us to express "match whole words |
| 395 | * only" in a simple way, so we have to wrap them all into |
| 396 | * (^| )(...regex...)( |$) |
| 397 | */ |
| 398 | #define RE_PREFIX"(^| )(" "(^| )(" |
| 399 | #define RE_SUFFIX")( |$)" ")( |$)" |
| 400 | |
| 401 | static regex_t metar_re[RE_NUM]; |
| 402 | static void (*metar_f[RE_NUM]) (gchar *tokp, WeatherInfo *info); |
| 403 | |
| 404 | static void |
| 405 | metar_init_re (void) |
| 406 | { |
| 407 | static gboolean initialized = FALSE(0); |
| 408 | if (initialized) |
| 409 | return; |
| 410 | initialized = TRUE(!(0)); |
| 411 | |
| 412 | regcomp (&metar_re[TIME_RE], RE_PREFIX"(^| )(" TIME_RE_STR"([0-9]{6})Z" RE_SUFFIX")( |$)", REG_EXTENDED1); |
| 413 | regcomp (&metar_re[WIND_RE], RE_PREFIX"(^| )(" WIND_RE_STR"(([0-9]{3})|VRB)([0-9]?[0-9]{2})(G[0-9]?[0-9]{2})?(KT|MPS)" RE_SUFFIX")( |$)", REG_EXTENDED1); |
| 414 | regcomp (&metar_re[VIS_RE], RE_PREFIX"(^| )(" VIS_RE_STR"((([0-9]?[0-9])|(M?([12] )?([1357]/1?[0-9])))SM)|" "([0-9]{4}(N|NE|E|SE|S|SW|W|NW( [0-9]{4}(N|NE|E|SE|S|SW|W|NW))?)?)|" "CAVOK" RE_SUFFIX")( |$)", REG_EXTENDED1); |
| 415 | regcomp (&metar_re[COND_RE], RE_PREFIX"(^| )(" COND_RE_STR"(-|\\+)?(VC|MI|BC|PR|TS|BL|SH|DR|FZ)?(DZ|RA|SN|SG|IC|PE|GR|GS|UP|BR|FG|FU|VA|SA|HZ|PY|DU|SQ|SS|DS|PO|\\+?FC)" RE_SUFFIX")( |$)", REG_EXTENDED1); |
| 416 | regcomp (&metar_re[CLOUD_RE], RE_PREFIX"(^| )(" CLOUD_RE_STR"((CLR|BKN|SCT|FEW|OVC|SKC|NSC)([0-9]{3}|///)?(CB|TCU|///)?)" RE_SUFFIX")( |$)", REG_EXTENDED1); |
| 417 | regcomp (&metar_re[TEMP_RE], RE_PREFIX"(^| )(" TEMP_RE_STR"(M?[0-9][0-9])/(M?(//|[0-9][0-9])?)" RE_SUFFIX")( |$)", REG_EXTENDED1); |
| 418 | regcomp (&metar_re[PRES_RE], RE_PREFIX"(^| )(" PRES_RE_STR"(A|Q)([0-9]{4})" RE_SUFFIX")( |$)", REG_EXTENDED1); |
| 419 | |
| 420 | metar_f[TIME_RE] = metar_tok_time; |
| 421 | metar_f[WIND_RE] = metar_tok_wind; |
| 422 | metar_f[VIS_RE] = metar_tok_vis; |
| 423 | metar_f[COND_RE] = metar_tok_cond; |
| 424 | metar_f[CLOUD_RE] = metar_tok_cloud; |
| 425 | metar_f[TEMP_RE] = metar_tok_temp; |
| 426 | metar_f[PRES_RE] = metar_tok_pres; |
| 427 | } |
| 428 | |
| 429 | gboolean |
| 430 | metar_parse (gchar *metar, WeatherInfo *info) |
| 431 | { |
| 432 | gchar *p; |
| 433 | //gchar *rmk; |
| 434 | gint i, i2; |
| 435 | regmatch_t rm, rm2; |
| 436 | gchar *tokp; |
| 437 | |
| 438 | g_return_val_if_fail (info != NULL, FALSE)do { if ((info != ((void*)0))) { } else { g_return_if_fail_warning ("CafeWeather", ((const char*) (__func__)), "info != NULL"); return ((0)); } } while (0); |
| 439 | g_return_val_if_fail (metar != NULL, FALSE)do { if ((metar != ((void*)0))) { } else { g_return_if_fail_warning ("CafeWeather", ((const char*) (__func__)), "metar != NULL") ; return ((0)); } } while (0); |
| 440 | |
| 441 | metar_init_re (); |
| 442 | |
| 443 | /* |
| 444 | * Force parsing to end at "RMK" field. This prevents a subtle |
| 445 | * problem when info within the remark happens to match an earlier state |
| 446 | * and, as a result, throws off all the remaining expression |
| 447 | */ |
| 448 | if (0 != (p = strstr (metar, " RMK "))) { |
| 449 | *p = '\0'; |
| 450 | //rmk = p + 5; // uncomment this if RMK data becomes useful |
| 451 | } |
| 452 | |
| 453 | p = metar; |
| 454 | i = TIME_RE; |
| 455 | while (*p) { |
| 456 | |
| 457 | i2 = RE_NUM; |
| 458 | rm2.rm_so = strlen (p); |
| 459 | rm2.rm_eo = rm2.rm_so; |
| 460 | |
| 461 | for (i = 0; i < RE_NUM && rm2.rm_so > 0; i++) { |
| 462 | if (0 == regexec (&metar_re[i], p, 1, &rm, 0) |
| 463 | && rm.rm_so < rm2.rm_so) |
| 464 | { |
| 465 | i2 = i; |
| 466 | /* Skip leading and trailing space characters, if present. |
| 467 | (the regular expressions include those characters to |
| 468 | only get matches limited to whole words). */ |
| 469 | if (p[rm.rm_so] == ' ') rm.rm_so++; |
| 470 | if (p[rm.rm_eo - 1] == ' ') rm.rm_eo--; |
| 471 | rm2.rm_so = rm.rm_so; |
| 472 | rm2.rm_eo = rm.rm_eo; |
| 473 | } |
| 474 | } |
| 475 | |
| 476 | if (i2 != RE_NUM) { |
| 477 | tokp = g_strndup (p + rm2.rm_so, rm2.rm_eo - rm2.rm_so); |
| 478 | metar_f[i2] (tokp, info); |
| 479 | g_free (tokp); |
| 480 | } |
| 481 | |
| 482 | p += rm2.rm_eo; |
| 483 | p += strspn (p, " "); |
| 484 | } |
| 485 | return TRUE(!(0)); |
| 486 | } |
| 487 | |
| 488 | static void |
| 489 | metar_finish (GObject *object, GAsyncResult *result, gpointer data) |
| 490 | { |
| 491 | SoupSession *session = SOUP_SESSION (object); |
| 492 | SoupMessage *msg = soup_session_get_async_result_message (session, result); |
| 493 | WeatherInfo *info = (WeatherInfo *)data; |
| 494 | WeatherLocation *loc; |
| 495 | const gchar *p, *endtag; |
| 496 | gchar *searchkey, *metar; |
| 497 | gboolean success = FALSE(0); |
| 498 | GBytes *response_body = NULL((void*)0); |
| 499 | const gchar *msgdata; |
| 500 | |
| 501 | g_return_if_fail (info != NULL)do { if ((info != ((void*)0))) { } else { g_return_if_fail_warning ("CafeWeather", ((const char*) (__func__)), "info != NULL"); return; } } while (0); |
| 502 | |
| 503 | response_body = soup_session_send_and_read_finish (session, result, NULL((void*)0)); |
| 504 | |
| 505 | if (!SOUP_STATUS_IS_SUCCESSFUL (soup_message_get_status (msg))((soup_message_get_status (msg)) >= 200 && (soup_message_get_status (msg)) < 300)) { |
| 506 | /* Translators: %d is an error code, and %s the error string */ |
| 507 | g_warning (_("Failed to get METAR data: %d %s.\n")(cafeweather_gettext ("Failed to get METAR data: %d %s.\n")), |
| 508 | soup_message_get_status (msg), soup_message_get_reason_phrase (msg)); |
| 509 | |
| 510 | request_done (info, FALSE(0)); |
| 511 | g_bytes_unref (response_body); |
| 512 | return; |
| 513 | } |
| 514 | |
| 515 | loc = info->location; |
| 516 | |
| 517 | msgdata = g_bytes_get_data (response_body, NULL((void*)0)); |
| 518 | |
| 519 | searchkey = g_strdup_printf ("<raw_text>%s", loc->code); |
| 520 | p = strstr (msgdata, searchkey); |
| 521 | g_free (searchkey); |
| 522 | |
| 523 | if (p) { |
| 524 | p += WEATHER_LOCATION_CODE_LEN4 + 11; |
| 525 | endtag = strstr (p, "</raw_text>"); |
| 526 | if (endtag) |
| 527 | metar = g_strndup (p, endtag - p); |
| 528 | else |
| 529 | metar = g_strdup (p)g_strdup_inline (p); |
| 530 | success = metar_parse (metar, info); |
| 531 | g_free (metar); |
| 532 | } else if (!strstr (msgdata, "aviationweather.gov")) { |
| 533 | /* The response doesn't even seem to have come from NOAA... |
| 534 | * most likely it is a wifi hotspot login page. Call that a |
| 535 | * network error. |
| 536 | */ |
| 537 | info->network_error = TRUE(!(0)); |
| 538 | } |
| 539 | |
| 540 | info->valid = success; |
| 541 | request_done (info, TRUE(!(0))); |
| 542 | g_bytes_unref (response_body); |
| 543 | } |
| 544 | |
| 545 | /* Read current conditions and fill in info structure */ |
| 546 | void |
| 547 | metar_start_open (WeatherInfo *info) |
| 548 | { |
| 549 | WeatherLocation *loc; |
| 550 | SoupMessage *msg; |
| 551 | gchar *query; |
| 552 | |
| 553 | g_return_if_fail (info != NULL)do { if ((info != ((void*)0))) { } else { g_return_if_fail_warning ("CafeWeather", ((const char*) (__func__)), "info != NULL"); return; } } while (0); |
| 554 | info->valid = info->network_error = FALSE(0); |
| 555 | loc = info->location; |
| 556 | if (loc == NULL((void*)0)) { |
| 557 | g_warning (_("WeatherInfo missing location")(cafeweather_gettext ("WeatherInfo missing location"))); |
| 558 | return; |
| 559 | } |
| 560 | |
| 561 | query = soup_form_encode ( |
| 562 | "dataSource", "metars", |
| 563 | "requestType", "retrieve", |
| 564 | "format", "xml", |
| 565 | "hoursBeforeNow", "3", |
| 566 | "mostRecent", "true", |
| 567 | "fields", "raw_text", |
| 568 | "stationString", loc->code, |
| 569 | NULL((void*)0)); |
| 570 | |
| 571 | msg = soup_message_new_from_encoded_form (SOUP_METHOD_GET(((const char *)((__extension__ ({ _Static_assert (sizeof *(& (_SOUP_METHOD_GET)) == sizeof (gpointer), "Expression evaluates to false" ); __typeof__ (*(&(_SOUP_METHOD_GET))) gapg_temp_newval; __typeof__ ((&(_SOUP_METHOD_GET))) gapg_temp_atomic = (&(_SOUP_METHOD_GET )); __atomic_load (gapg_temp_atomic, &gapg_temp_newval, 5 ); gapg_temp_newval; })) ? (_SOUP_METHOD_GET) : ((__extension__ ({ _Static_assert (sizeof *(&(_SOUP_METHOD_GET)) == sizeof (gpointer), "Expression evaluates to false"); __typeof__ ((& (_SOUP_METHOD_GET))) gaps_temp_atomic = (&(_SOUP_METHOD_GET )); __typeof__ (*(&(_SOUP_METHOD_GET))) gaps_temp_newval = ((gpointer)g_intern_static_string ("GET")); (void) (0 ? (gpointer ) * (&(_SOUP_METHOD_GET)) : ((void*)0)); __atomic_store ( gaps_temp_atomic, &gaps_temp_newval, 5); })), (_SOUP_METHOD_GET ))))), "https://www.aviationweather.gov/cgi-bin/data/dataserver.php", query); |
| 572 | |
| 573 | soup_session_send_and_read_async (info->session, msg, G_PRIORITY_DEFAULT0, NULL((void*)0), metar_finish, info); |
| 574 | |
| 575 | info->requests_pending++; |
| 576 | |
| 577 | g_free (query); |
| 578 | } |