1 /*- 2 * Copyright (c) 1992-2009 Edwin Groothuis <edwin@FreeBSD.org>. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <ctype.h> 32 #include <math.h> 33 #include <stdio.h> 34 #include <stdlib.h> 35 #include <string.h> 36 #include <err.h> 37 38 #include "calendar.h" 39 40 static char *showflags(int flags); 41 static int isonlydigits(char *s, int nostar); 42 static const char *getmonthname(int i); 43 static int checkmonth(char *s, size_t *len, size_t *offset, const char **month); 44 static const char *getdayofweekname(int i); 45 static int checkdayofweek(char *s, size_t *len, size_t *offset, const char **dow); 46 static int indextooffset(char *s); 47 static int parseoffset(char *s); 48 static char *floattoday(int year, double f); 49 static char *floattotime(double f); 50 static int wdayom (int day, int offset, int month, int year); 51 52 /* 53 * Expected styles: 54 * 55 * Date ::= Month . ' ' . DayOfMonth | 56 * Month . ' ' . DayOfWeek . ModifierIndex | 57 * Month . '/' . DayOfMonth | 58 * Month . '/' . DayOfWeek . ModifierIndex | 59 * DayOfMonth . ' ' . Month | 60 * DayOfMonth . '/' . Month | 61 * DayOfWeek . ModifierIndex . ' ' .Month | 62 * DayOfWeek . ModifierIndex . '/' .Month | 63 * DayOfWeek . ModifierIndex | 64 * SpecialDay . ModifierOffset 65 * 66 * Month ::= MonthName | MonthNumber | '*' 67 * MonthNumber ::= '0' ... '9' | '00' ... '09' | '10' ... '12' 68 * MonthName ::= MonthNameShort | MonthNameLong 69 * MonthNameLong ::= 'January' ... 'December' 70 * MonthNameShort ::= 'Jan' ... 'Dec' | 'Jan.' ... 'Dec.' 71 * 72 * DayOfWeek ::= DayOfWeekShort | DayOfWeekLong 73 * DayOfWeekShort ::= 'Mon' .. 'Sun' 74 * DayOfWeekLong ::= 'Monday' .. 'Sunday' 75 * DayOfMonth ::= '0' ... '9' | '00' ... '09' | '10' ... '29' | 76 * '30' ... '31' | '*' 77 * 78 * ModifierOffset ::= '' | '+' . ModifierNumber | '-' . ModifierNumber 79 * ModifierNumber ::= '0' ... '9' | '00' ... '99' | '000' ... '299' | 80 * '300' ... '359' | '360' ... '365' 81 * ModifierIndex ::= 'Second' | 'Third' | 'Fourth' | 'Fifth' | 82 * 'First' | 'Last' 83 * 84 * SpecialDay ::= 'Easter' | 'Paskha' | 'ChineseNewYear' 85 * 86 */ 87 static int 88 determinestyle(char *date, int *flags, 89 char *month, int *imonth, char *dayofmonth, int *idayofmonth, 90 char *dayofweek, int *idayofweek, char *modifieroffset, 91 char *modifierindex, char *specialday, char *year, int *iyear) 92 { 93 char *p, *p1, *p2, *py; 94 const char *dow, *pmonth; 95 char pold; 96 size_t len, offset; 97 98 *flags = F_NONE; 99 *month = '\0'; 100 *imonth = 0; 101 *year = '\0'; 102 *iyear = 0; 103 *dayofmonth = '\0'; 104 *idayofmonth = 0; 105 *dayofweek = '\0'; 106 *idayofweek = 0; 107 *modifieroffset = '\0'; 108 *modifierindex = '\0'; 109 *specialday = '\0'; 110 111 #define CHECKSPECIAL(s1, s2, lens2, type) \ 112 if (s2 != NULL && strncmp(s1, s2, lens2) == 0) { \ 113 *flags |= F_SPECIALDAY; \ 114 *flags |= type; \ 115 *flags |= F_VARIABLE; \ 116 if (strlen(s1) == lens2) { \ 117 strcpy(specialday, s1); \ 118 return (1); \ 119 } \ 120 strncpy(specialday, s1, lens2); \ 121 specialday[lens2] = '\0'; \ 122 strcpy(modifieroffset, s1 + lens2); \ 123 *flags |= F_MODIFIEROFFSET; \ 124 return (1); \ 125 } 126 127 if ((p = strchr(date, ' ')) == NULL) { 128 if ((p = strchr(date, '/')) == NULL) { 129 CHECKSPECIAL(date, STRING_CNY, strlen(STRING_CNY), 130 F_CNY); 131 CHECKSPECIAL(date, ncny.name, ncny.len, F_CNY); 132 CHECKSPECIAL(date, STRING_NEWMOON, 133 strlen(STRING_NEWMOON), F_NEWMOON); 134 CHECKSPECIAL(date, nnewmoon.name, nnewmoon.len, 135 F_NEWMOON); 136 CHECKSPECIAL(date, STRING_FULLMOON, 137 strlen(STRING_FULLMOON), F_FULLMOON); 138 CHECKSPECIAL(date, nfullmoon.name, nfullmoon.len, 139 F_FULLMOON); 140 CHECKSPECIAL(date, STRING_PASKHA, 141 strlen(STRING_PASKHA), F_PASKHA); 142 CHECKSPECIAL(date, npaskha.name, npaskha.len, F_PASKHA); 143 CHECKSPECIAL(date, STRING_EASTER, 144 strlen(STRING_EASTER), F_EASTER); 145 CHECKSPECIAL(date, neaster.name, neaster.len, F_EASTER); 146 CHECKSPECIAL(date, STRING_MAREQUINOX, 147 strlen(STRING_MAREQUINOX), F_MAREQUINOX); 148 CHECKSPECIAL(date, nmarequinox.name, nmarequinox.len, 149 F_SEPEQUINOX); 150 CHECKSPECIAL(date, STRING_SEPEQUINOX, 151 strlen(STRING_SEPEQUINOX), F_SEPEQUINOX); 152 CHECKSPECIAL(date, nsepequinox.name, nsepequinox.len, 153 F_SEPEQUINOX); 154 CHECKSPECIAL(date, STRING_JUNSOLSTICE, 155 strlen(STRING_JUNSOLSTICE), F_JUNSOLSTICE); 156 CHECKSPECIAL(date, njunsolstice.name, njunsolstice.len, 157 F_JUNSOLSTICE); 158 CHECKSPECIAL(date, STRING_DECSOLSTICE, 159 strlen(STRING_DECSOLSTICE), F_DECSOLSTICE); 160 CHECKSPECIAL(date, ndecsolstice.name, ndecsolstice.len, 161 F_DECSOLSTICE); 162 if (checkdayofweek(date, &len, &offset, &dow) != 0) { 163 *flags |= F_DAYOFWEEK; 164 *flags |= F_VARIABLE; 165 *idayofweek = offset; 166 if (strlen(date) == len) { 167 strcpy(dayofweek, date); 168 return (1); 169 } 170 strncpy(dayofweek, date, len); 171 dayofweek[len] = '\0'; 172 strcpy(modifierindex, date + len); 173 *flags |= F_MODIFIERINDEX; 174 return (1); 175 } 176 if (isonlydigits(date, 1)) { 177 /* Assume month number only */ 178 *flags |= F_MONTH; 179 *imonth = (int)strtol(date, (char **)NULL, 10); 180 strcpy(month, getmonthname(*imonth)); 181 return(1); 182 } 183 return (0); 184 } 185 } 186 187 /* 188 * After this, leave by goto-ing to "allfine" or "fail" to restore the 189 * original data in `date'. 190 */ 191 pold = *p; 192 *p = 0; 193 p1 = date; 194 p2 = p + 1; 195 /* Now p2 points to the next field and p1 to the first field */ 196 197 if ((py = strchr(p2, '/')) != NULL) { 198 /* We have a year in the string. Now this is getting tricky */ 199 strcpy(year, p1); 200 *iyear = (int)strtol(year, NULL, 10); 201 p1 = p2; 202 p2 = py + 1; 203 *py = 0; 204 *flags |= F_YEAR; 205 } 206 207 /* Check if there is a month-string in the date */ 208 if ((checkmonth(p1, &len, &offset, &pmonth) != 0) 209 || (checkmonth(p2, &len, &offset, &pmonth) != 0 && (p2 = p1))) { 210 /* p2 is the non-month part */ 211 *flags |= F_MONTH; 212 *imonth = offset; 213 214 strcpy(month, getmonthname(offset)); 215 if (isonlydigits(p2, 1)) { 216 strcpy(dayofmonth, p2); 217 *idayofmonth = (int)strtol(p2, (char **)NULL, 10); 218 *flags |= F_DAYOFMONTH; 219 goto allfine; 220 } 221 if (strcmp(p2, "*") == 0) { 222 *flags |= F_ALLDAY; 223 goto allfine; 224 } 225 226 if (checkdayofweek(p2, &len, &offset, &dow) != 0) { 227 *flags |= F_DAYOFWEEK; 228 *flags |= F_VARIABLE; 229 *idayofweek = offset; 230 strcpy(dayofweek, getdayofweekname(offset)); 231 if (strlen(p2) == len) 232 goto allfine; 233 strcpy(modifierindex, p2 + len); 234 *flags |= F_MODIFIERINDEX; 235 goto allfine; 236 } 237 goto fail; 238 } 239 240 /* Check if there is an every-day or every-month in the string */ 241 if ((strcmp(p1, "*") == 0 && isonlydigits(p2, 1)) 242 || (strcmp(p2, "*") == 0 && isonlydigits(p1, 1) && (p2 = p1))) { 243 int d; 244 245 *flags |= F_ALLMONTH; 246 *flags |= F_DAYOFMONTH; 247 d = (int)strtol(p2, (char **)NULL, 10); 248 *idayofmonth = d; 249 sprintf(dayofmonth, "%d", d); 250 goto allfine; 251 } 252 253 /* Month as a number, then a weekday */ 254 if (isonlydigits(p1, 1) 255 && checkdayofweek(p2, &len, &offset, &dow) != 0) { 256 int d; 257 258 *flags |= F_MONTH; 259 *flags |= F_DAYOFWEEK; 260 *flags |= F_VARIABLE; 261 262 *idayofweek = offset; 263 d = (int)strtol(p1, (char **)NULL, 10); 264 *imonth = d; 265 strcpy(month, getmonthname(d)); 266 267 strcpy(dayofweek, getdayofweekname(offset)); 268 if (strlen(p2) == len) 269 goto allfine; 270 strcpy(modifierindex, p2 + len); 271 *flags |= F_MODIFIERINDEX; 272 goto allfine; 273 } 274 275 /* If both the month and date are specified as numbers */ 276 if (isonlydigits(p1, 1) && isonlydigits(p2, 0)) { 277 /* Now who wants to be this ambigious? :-( */ 278 int m, d; 279 280 if (strchr(p2, '*') != NULL) 281 *flags |= F_VARIABLE; 282 283 m = (int)strtol(p1, (char **)NULL, 10); 284 d = (int)strtol(p2, (char **)NULL, 10); 285 286 *flags |= F_MONTH; 287 *flags |= F_DAYOFMONTH; 288 289 if (m > 12) { 290 *imonth = d; 291 *idayofmonth = m; 292 strcpy(month, getmonthname(d)); 293 sprintf(dayofmonth, "%d", m); 294 } else { 295 *imonth = m; 296 *idayofmonth = d; 297 strcpy(month, getmonthname(m)); 298 sprintf(dayofmonth, "%d", d); 299 } 300 goto allfine; 301 } 302 303 /* FALLTHROUGH */ 304 fail: 305 *p = pold; 306 return (0); 307 allfine: 308 *p = pold; 309 return (1); 310 311 } 312 313 void 314 remember(int *rememberindex, int *y, int *m, int *d, char **ed, int yy, int mm, 315 int dd, char *extra); 316 void 317 remember(int *rememberindex, int *y, int *m, int *d, char **ed, int yy, int mm, 318 int dd, char *extra) 319 { 320 static int warned = 0; 321 322 if (*rememberindex >= MAXCOUNT - 1) { 323 if (warned == 0) 324 warnx("Index > %d, ignored", MAXCOUNT); 325 warned++; 326 return; 327 } 328 y[*rememberindex] = yy; 329 m[*rememberindex] = mm; 330 d[*rememberindex] = dd; 331 if (extra != NULL) 332 strcpy(ed[*rememberindex], extra); 333 else 334 ed[*rememberindex][0] = '\0'; 335 *rememberindex += 1; 336 } 337 338 static void 339 debug_determinestyle(int dateonly, char *date, int flags, char *month, 340 int imonth, char *dayofmonth, int idayofmonth, char *dayofweek, 341 int idayofweek, char *modifieroffset, char *modifierindex, char *specialday, 342 char *year, int iyear) 343 { 344 345 if (dateonly != 0) { 346 printf("-------\ndate: |%s|\n", date); 347 if (dateonly == 1) 348 return; 349 } 350 printf("flags: %x - %s\n", flags, showflags(flags)); 351 if (modifieroffset[0] != '\0') 352 printf("modifieroffset: |%s|\n", modifieroffset); 353 if (modifierindex[0] != '\0') 354 printf("modifierindex: |%s|\n", modifierindex); 355 if (year[0] != '\0') 356 printf("year: |%s| (%d)\n", year, iyear); 357 if (month[0] != '\0') 358 printf("month: |%s| (%d)\n", month, imonth); 359 if (dayofmonth[0] != '\0') 360 printf("dayofmonth: |%s| (%d)\n", dayofmonth, idayofmonth); 361 if (dayofweek[0] != '\0') 362 printf("dayofweek: |%s| (%d)\n", dayofweek, idayofweek); 363 if (specialday[0] != '\0') 364 printf("specialday: |%s|\n", specialday); 365 } 366 367 static struct yearinfo { 368 int year; 369 int ieaster, ipaskha, firstcnyday; 370 double ffullmoon[MAXMOONS], fnewmoon[MAXMOONS]; 371 double ffullmooncny[MAXMOONS], fnewmooncny[MAXMOONS]; 372 int ichinesemonths[MAXMOONS]; 373 double equinoxdays[2], solsticedays[2]; 374 int *monthdays; 375 struct yearinfo *next; 376 } *years, *yearinfo; 377 378 /* 379 * Calculate dates with offset from weekdays, like Thurs-3, Wed+2, etc. 380 * day is the day of the week, 381 * offset the ordinal number of the weekday in the month. 382 */ 383 static int 384 wdayom (int day, int offset, int month, int year) 385 { 386 /* Weekday of first day in month */ 387 int wday1; /* first day of month */ 388 /* Weekday of last day in month */ 389 int wdayn; 390 int d; 391 392 wday1 = first_dayofweek_of_month(year, month); 393 if (wday1 < 0) /* not set */ 394 return (wday1); 395 /* 396 * Date of zeroth or first of our weekday in month, depending on the 397 * relationship with the first of the month. The range is -6:6. 398 */ 399 d = (day - wday1 + 1) % 7; 400 /* 401 * Which way are we counting? Offset 0 is invalid, abs (offset) > 5 is 402 * meaningless, but that's OK. Offset 5 may or may not be meaningless, 403 * so there's no point in complaining for complaining's sake. 404 */ 405 if (offset < 0) { /* back from end of month */ 406 /* FIXME */ 407 wdayn = d; 408 while (wdayn <= yearinfo->monthdays[month]) 409 wdayn += 7; 410 d = offset * 7 + wdayn; 411 } else if (offset > 0){ 412 if (d > 0) 413 d += offset * 7 - 7; 414 else 415 d += offset * 7; 416 } else 417 warnx ("Invalid offset 0"); 418 return (d); 419 } 420 421 /* 422 * Possible date formats include any combination of: 423 * 3-charmonth (January, Jan, Jan) 424 * 3-charweekday (Friday, Monday, mon.) 425 * numeric month or day (1, 2, 04) 426 * 427 * Any character may separate them, or they may not be separated. Any line, 428 * following a line that is matched, that starts with "whitespace", is shown 429 * along with the matched line. 430 */ 431 int 432 parsedaymonth(char *date, int *yearp, int *monthp, int *dayp, int *flags, 433 char **edp) 434 { 435 char month[100], dayofmonth[100], dayofweek[100], modifieroffset[100]; 436 char syear[100]; 437 char modifierindex[100], specialday[100]; 438 int idayofweek = -1, imonth = -1, idayofmonth = -1, iyear = -1; 439 int year, remindex; 440 int d, m, dow, rm, rd, offset; 441 char *ed; 442 int retvalsign = 1; 443 444 /* 445 * CONVENTION 446 * 447 * Month: 1-12 448 * Monthname: Jan .. Dec 449 * Day: 1-31 450 * Weekday: Mon .. Sun 451 * 452 */ 453 454 *flags = 0; 455 456 if (debug) 457 debug_determinestyle(1, date, *flags, month, imonth, 458 dayofmonth, idayofmonth, dayofweek, idayofweek, 459 modifieroffset, modifierindex, specialday, syear, iyear); 460 if (determinestyle(date, flags, month, &imonth, dayofmonth, 461 &idayofmonth, dayofweek, &idayofweek, modifieroffset, 462 modifierindex, specialday, syear, &iyear) == 0) { 463 if (debug) 464 printf("Failed!\n"); 465 return (0); 466 } 467 468 if (debug) 469 debug_determinestyle(0, date, *flags, month, imonth, 470 dayofmonth, idayofmonth, dayofweek, idayofweek, 471 modifieroffset, modifierindex, specialday, syear, iyear); 472 473 remindex = 0; 474 for (year = year1; year <= year2; year++) { 475 476 int lflags = *flags; 477 /* If the year is specified, only do it if it is this year! */ 478 if ((lflags & F_YEAR) != 0) 479 if (iyear != year) 480 continue; 481 lflags &= ~F_YEAR; 482 483 /* Get important dates for this year */ 484 yearinfo = years; 485 while (yearinfo != NULL) { 486 if (yearinfo->year == year) 487 break; 488 yearinfo = yearinfo -> next; 489 } 490 if (yearinfo == NULL) { 491 yearinfo = (struct yearinfo *)calloc(1, 492 sizeof(struct yearinfo)); 493 if (yearinfo == NULL) 494 errx(1, "Unable to allocate more years"); 495 yearinfo->year = year; 496 yearinfo->next = years; 497 years = yearinfo; 498 499 yearinfo->monthdays = monthdaytab[isleap(year)]; 500 yearinfo->ieaster = easter(year); 501 yearinfo->ipaskha = paskha(year); 502 fpom(year, UTCOffset, yearinfo->ffullmoon, 503 yearinfo->fnewmoon); 504 fpom(year, UTCOFFSET_CNY, yearinfo->ffullmooncny, 505 yearinfo->fnewmooncny); 506 fequinoxsolstice(year, UTCOffset, 507 yearinfo->equinoxdays, yearinfo->solsticedays); 508 509 /* 510 * CNY: Match day with sun longitude at 330` with new 511 * moon 512 */ 513 yearinfo->firstcnyday = calculatesunlongitude30(year, 514 UTCOFFSET_CNY, yearinfo->ichinesemonths); 515 for (m = 0; yearinfo->fnewmooncny[m] >= 0; m++) { 516 if (yearinfo->fnewmooncny[m] > 517 yearinfo->firstcnyday) { 518 yearinfo->firstcnyday = 519 floor(yearinfo->fnewmooncny[m - 1]); 520 break; 521 } 522 } 523 } 524 525 /* Same day every year */ 526 if (lflags == (F_MONTH | F_DAYOFMONTH)) { 527 if (!remember_ymd(year, imonth, idayofmonth)) 528 continue; 529 remember(&remindex, yearp, monthp, dayp, edp, 530 year, imonth, idayofmonth, NULL); 531 continue; 532 } 533 534 /* XXX Same day every year, but variable */ 535 if (lflags == (F_MONTH | F_DAYOFMONTH | F_VARIABLE)) { 536 if (!remember_ymd(year, imonth, idayofmonth)) 537 continue; 538 remember(&remindex, yearp, monthp, dayp, edp, 539 year, imonth, idayofmonth, NULL); 540 continue; 541 } 542 543 /* Same day every month */ 544 if (lflags == (F_ALLMONTH | F_DAYOFMONTH)) { 545 for (m = 1; m <= 12; m++) { 546 if (!remember_ymd(year, m, idayofmonth)) 547 continue; 548 remember(&remindex, yearp, monthp, dayp, edp, 549 year, m, idayofmonth, NULL); 550 } 551 continue; 552 } 553 554 /* Every day of a month */ 555 if (lflags == (F_ALLDAY | F_MONTH)) { 556 for (d = 1; d <= yearinfo->monthdays[imonth]; d++) { 557 if (!remember_ymd(year, imonth, d)) 558 continue; 559 remember(&remindex, yearp, monthp, dayp, edp, 560 year, imonth, d, NULL); 561 } 562 continue; 563 } 564 565 /* One day of every month */ 566 if (lflags == (F_ALLMONTH | F_DAYOFWEEK)) { 567 for (m = 1; m <= 12; m++) { 568 if (!remember_ymd(year, m, idayofmonth)) 569 continue; 570 remember(&remindex, yearp, monthp, dayp, edp, 571 year, m, idayofmonth, NULL); 572 } 573 continue; 574 } 575 576 /* Every dayofweek of the year */ 577 if (lflags == (F_DAYOFWEEK | F_VARIABLE)) { 578 dow = first_dayofweek_of_year(year); 579 d = (idayofweek - dow + 8) % 7; 580 while (d <= 366) { 581 if (remember_yd(year, d, &rm, &rd)) 582 remember(&remindex, 583 yearp, monthp, dayp, edp, 584 year, rm, rd, NULL); 585 d += 7; 586 } 587 continue; 588 } 589 590 /* 591 * Every so-manied dayofweek of every month of the year: 592 * Thu-3 593 */ 594 if (lflags == (F_DAYOFWEEK | F_MODIFIERINDEX | F_VARIABLE)) { 595 offset = indextooffset(modifierindex); 596 597 for (m = 0; m <= 12; m++) { 598 d = wdayom (idayofweek, offset, m, year); 599 if (remember_ymd(year, m, d)) { 600 remember(&remindex, 601 yearp, monthp, dayp, edp, 602 year, m, d, NULL); 603 continue; 604 } 605 } 606 continue; 607 } 608 609 /* 610 * A certain dayofweek of a month 611 * Jan/Thu-3 612 */ 613 if (lflags == 614 (F_MONTH | F_DAYOFWEEK | F_MODIFIERINDEX | F_VARIABLE)) { 615 offset = indextooffset(modifierindex); 616 dow = first_dayofweek_of_month(year, imonth); 617 d = (idayofweek - dow + 8) % 7; 618 619 if (offset > 0) { 620 while (d <= yearinfo->monthdays[imonth]) { 621 if (--offset == 0 622 && remember_ymd(year, imonth, d)) { 623 remember(&remindex, 624 yearp, monthp, dayp, edp, 625 year, imonth, d, NULL); 626 continue; 627 } 628 d += 7; 629 } 630 continue; 631 } 632 if (offset < 0) { 633 while (d <= yearinfo->monthdays[imonth]) 634 d += 7; 635 while (offset != 0) { 636 offset++; 637 d -= 7; 638 } 639 if (remember_ymd(year, imonth, d)) 640 remember(&remindex, 641 yearp, monthp, dayp, edp, 642 year, imonth, d, NULL); 643 continue; 644 } 645 continue; 646 } 647 648 /* Every dayofweek of the month */ 649 if (lflags == (F_DAYOFWEEK | F_MONTH | F_VARIABLE)) { 650 dow = first_dayofweek_of_month(year, imonth); 651 d = (idayofweek - dow + 8) % 7; 652 while (d <= yearinfo->monthdays[imonth]) { 653 if (remember_ymd(year, imonth, d)) 654 remember(&remindex, 655 yearp, monthp, dayp, edp, 656 year, imonth, d, NULL); 657 d += 7; 658 } 659 continue; 660 } 661 662 /* Easter */ 663 if ((lflags & ~F_MODIFIEROFFSET) == 664 (F_SPECIALDAY | F_VARIABLE | F_EASTER)) { 665 offset = 0; 666 if ((lflags & F_MODIFIEROFFSET) != 0) 667 offset = parseoffset(modifieroffset); 668 if (remember_yd(year, yearinfo->ieaster + offset, 669 &rm, &rd)) 670 remember(&remindex, yearp, monthp, dayp, edp, 671 year, rm, rd, NULL); 672 continue; 673 } 674 675 /* Paskha */ 676 if ((lflags & ~F_MODIFIEROFFSET) == 677 (F_SPECIALDAY | F_VARIABLE | F_PASKHA)) { 678 offset = 0; 679 if ((lflags & F_MODIFIEROFFSET) != 0) 680 offset = parseoffset(modifieroffset); 681 if (remember_yd(year, yearinfo->ipaskha + offset, 682 &rm, &rd)) 683 remember(&remindex, yearp, monthp, dayp, edp, 684 year, rm, rd, NULL); 685 continue; 686 } 687 688 /* Chinese New Year */ 689 if ((lflags & ~F_MODIFIEROFFSET) == 690 (F_SPECIALDAY | F_VARIABLE | F_CNY)) { 691 offset = 0; 692 if ((lflags & F_MODIFIEROFFSET) != 0) 693 offset = parseoffset(modifieroffset); 694 if (remember_yd(year, yearinfo->firstcnyday + offset, 695 &rm, &rd)) 696 remember(&remindex, yearp, monthp, dayp, edp, 697 year, rm, rd, NULL); 698 continue; 699 } 700 701 /* FullMoon */ 702 if ((lflags & ~F_MODIFIEROFFSET) == 703 (F_SPECIALDAY | F_VARIABLE | F_FULLMOON)) { 704 int i; 705 706 offset = 0; 707 if ((lflags & F_MODIFIEROFFSET) != 0) 708 offset = parseoffset(modifieroffset); 709 for (i = 0; yearinfo->ffullmoon[i] > 0; i++) { 710 if (remember_yd(year, 711 floor(yearinfo->ffullmoon[i]) + offset, 712 &rm, &rd)) { 713 ed = floattotime( 714 yearinfo->ffullmoon[i]); 715 remember(&remindex, 716 yearp, monthp, dayp, edp, 717 year, rm, rd, ed); 718 } 719 } 720 continue; 721 } 722 723 /* NewMoon */ 724 if ((lflags & ~F_MODIFIEROFFSET) == 725 (F_SPECIALDAY | F_VARIABLE | F_NEWMOON)) { 726 int i; 727 728 offset = 0; 729 if ((lflags & F_MODIFIEROFFSET) != 0) 730 offset = parseoffset(modifieroffset); 731 for (i = 0; yearinfo->ffullmoon[i] > 0; i++) { 732 if (remember_yd(year, 733 floor(yearinfo->fnewmoon[i]) + offset, 734 &rm, &rd)) { 735 ed = floattotime(yearinfo->fnewmoon[i]); 736 remember(&remindex, 737 yearp, monthp, dayp, edp, 738 year, rm, rd, ed); 739 } 740 } 741 continue; 742 } 743 744 /* (Mar|Sep)Equinox */ 745 if ((lflags & ~F_MODIFIEROFFSET) == 746 (F_SPECIALDAY | F_VARIABLE | F_MAREQUINOX)) { 747 offset = 0; 748 if ((lflags & F_MODIFIEROFFSET) != 0) 749 offset = parseoffset(modifieroffset); 750 if (remember_yd(year, yearinfo->equinoxdays[0] + offset, 751 &rm, &rd)) { 752 ed = floattotime(yearinfo->equinoxdays[0]); 753 remember(&remindex, yearp, monthp, dayp, edp, 754 year, rm, rd, ed); 755 } 756 continue; 757 } 758 if ((lflags & ~F_MODIFIEROFFSET) == 759 (F_SPECIALDAY | F_VARIABLE | F_SEPEQUINOX)) { 760 offset = 0; 761 if ((lflags & F_MODIFIEROFFSET) != 0) 762 offset = parseoffset(modifieroffset); 763 if (remember_yd(year, yearinfo->equinoxdays[1] + offset, 764 &rm, &rd)) { 765 ed = floattotime(yearinfo->equinoxdays[1]); 766 remember(&remindex, yearp, monthp, dayp, edp, 767 year, rm, rd, ed); 768 } 769 continue; 770 } 771 772 /* (Jun|Dec)Solstice */ 773 if ((lflags & ~F_MODIFIEROFFSET) == 774 (F_SPECIALDAY | F_VARIABLE | F_JUNSOLSTICE)) { 775 offset = 0; 776 if ((lflags & F_MODIFIEROFFSET) != 0) 777 offset = parseoffset(modifieroffset); 778 if (remember_yd(year, 779 yearinfo->solsticedays[0] + offset, &rm, &rd)) { 780 ed = floattotime(yearinfo->solsticedays[0]); 781 remember(&remindex, yearp, monthp, dayp, edp, 782 year, rm, rd, ed); 783 } 784 continue; 785 } 786 if ((lflags & ~F_MODIFIEROFFSET) == 787 (F_SPECIALDAY | F_VARIABLE | F_DECSOLSTICE)) { 788 offset = 0; 789 if ((lflags & F_MODIFIEROFFSET) != 0) 790 offset = parseoffset(modifieroffset); 791 if (remember_yd(year, 792 yearinfo->solsticedays[1] + offset, &rm, &rd)) { 793 ed = floattotime(yearinfo->solsticedays[1]); 794 remember(&remindex, yearp, monthp, dayp, edp, 795 year, rm, rd, ed); 796 } 797 continue; 798 } 799 800 if (debug) { 801 printf("Unprocessed:\n"); 802 debug_determinestyle(2, date, lflags, month, imonth, 803 dayofmonth, idayofmonth, dayofweek, idayofweek, 804 modifieroffset, modifierindex, specialday, syear, 805 iyear); 806 } 807 retvalsign = -1; 808 } 809 810 if (retvalsign == -1) 811 return (-remindex - 1); 812 else 813 return (remindex); 814 } 815 816 static char * 817 showflags(int flags) 818 { 819 static char s[1000]; 820 s[0] = '\0'; 821 822 if ((flags & F_YEAR) != 0) 823 strcat(s, "year "); 824 if ((flags & F_MONTH) != 0) 825 strcat(s, "month "); 826 if ((flags & F_DAYOFWEEK) != 0) 827 strcat(s, "dayofweek "); 828 if ((flags & F_DAYOFMONTH) != 0) 829 strcat(s, "dayofmonth "); 830 if ((flags & F_MODIFIERINDEX) != 0) 831 strcat(s, "modifierindex "); 832 if ((flags & F_MODIFIEROFFSET) != 0) 833 strcat(s, "modifieroffset "); 834 if ((flags & F_SPECIALDAY) != 0) 835 strcat(s, "specialday "); 836 if ((flags & F_ALLMONTH) != 0) 837 strcat(s, "allmonth "); 838 if ((flags & F_ALLDAY) != 0) 839 strcat(s, "allday "); 840 if ((flags & F_VARIABLE) != 0) 841 strcat(s, "variable "); 842 if ((flags & F_CNY) != 0) 843 strcat(s, "chinesenewyear "); 844 if ((flags & F_PASKHA) != 0) 845 strcat(s, "paskha "); 846 if ((flags & F_EASTER) != 0) 847 strcat(s, "easter "); 848 if ((flags & F_FULLMOON) != 0) 849 strcat(s, "fullmoon "); 850 if ((flags & F_NEWMOON) != 0) 851 strcat(s, "newmoon "); 852 if ((flags & F_MAREQUINOX) != 0) 853 strcat(s, "marequinox "); 854 if ((flags & F_SEPEQUINOX) != 0) 855 strcat(s, "sepequinox "); 856 if ((flags & F_JUNSOLSTICE) != 0) 857 strcat(s, "junsolstice "); 858 if ((flags & F_DECSOLSTICE) != 0) 859 strcat(s, "decsolstice "); 860 861 return s; 862 } 863 864 static const char * 865 getmonthname(int i) 866 { 867 if (i <= 0 || i > 12) 868 return (""); 869 if (nmonths[i - 1].len != 0 && nmonths[i - 1].name != NULL) 870 return (nmonths[i - 1].name); 871 return (months[i - 1]); 872 } 873 874 static int 875 checkmonth(char *s, size_t *len, size_t *offset, const char **month) 876 { 877 struct fixs *n; 878 int i; 879 880 for (i = 0; fnmonths[i].name != NULL; i++) { 881 n = fnmonths + i; 882 if (strncasecmp(s, n->name, n->len) == 0) { 883 *len = n->len; 884 *month = n->name; 885 *offset = i + 1; 886 return (1); 887 } 888 } 889 for (i = 0; nmonths[i].name != NULL; i++) { 890 n = nmonths + i; 891 if (strncasecmp(s, n->name, n->len) == 0) { 892 *len = n->len; 893 *month = n->name; 894 *offset = i + 1; 895 return (1); 896 } 897 } 898 for (i = 0; fmonths[i] != NULL; i++) { 899 *len = strlen(fmonths[i]); 900 if (strncasecmp(s, fmonths[i], *len) == 0) { 901 *month = fmonths[i]; 902 *offset = i + 1; 903 return (1); 904 } 905 } 906 for (i = 0; months[i] != NULL; i++) { 907 if (strncasecmp(s, months[i], 3) == 0) { 908 *len = 3; 909 *month = months[i]; 910 *offset = i + 1; 911 return (1); 912 } 913 } 914 return (0); 915 } 916 917 static const char * 918 getdayofweekname(int i) 919 { 920 if (ndays[i].len != 0 && ndays[i].name != NULL) 921 return (ndays[i].name); 922 return (days[i]); 923 } 924 925 static int 926 checkdayofweek(char *s, size_t *len, size_t *offset, const char **dow) 927 { 928 struct fixs *n; 929 int i; 930 931 for (i = 0; fndays[i].name != NULL; i++) { 932 n = fndays + i; 933 if (strncasecmp(s, n->name, n->len) == 0) { 934 *len = n->len; 935 *dow = n->name; 936 *offset = i; 937 return (1); 938 } 939 } 940 for (i = 0; ndays[i].name != NULL; i++) { 941 n = ndays + i; 942 if (strncasecmp(s, n->name, n->len) == 0) { 943 *len = n->len; 944 *dow = n->name; 945 *offset = i; 946 return (1); 947 } 948 } 949 for (i = 0; fdays[i] != NULL; i++) { 950 *len = strlen(fdays[i]); 951 if (strncasecmp(s, fdays[i], *len) == 0) { 952 *dow = fdays[i]; 953 *offset = i; 954 return (1); 955 } 956 } 957 for (i = 0; days[i] != NULL; i++) { 958 if (strncasecmp(s, days[i], 3) == 0) { 959 *len = 3; 960 *dow = days[i]; 961 *offset = i; 962 return (1); 963 } 964 } 965 return (0); 966 } 967 968 static int 969 isonlydigits(char *s, int nostar) 970 { 971 int i; 972 for (i = 0; s[i] != '\0'; i++) { 973 if (nostar == 0 && s[i] == '*' && s[i + 1] == '\0') 974 return 1; 975 if (!isdigit((unsigned char)s[i])) 976 return (0); 977 } 978 return (1); 979 } 980 981 static int 982 indextooffset(char *s) 983 { 984 int i; 985 struct fixs *n; 986 char *es; 987 988 if (s[0] == '+' || s[0] == '-') { 989 i = strtol (s, &es, 10); 990 if (*es != '\0') /* trailing junk */ 991 errx (1, "Invalid specifier format: %s\n", s); 992 return (i); 993 } 994 995 for (i = 0; i < 6; i++) { 996 if (strcasecmp(s, sequences[i]) == 0) { 997 if (i == 5) 998 return (-1); 999 return (i + 1); 1000 } 1001 } 1002 for (i = 0; i < 6; i++) { 1003 n = nsequences + i; 1004 if (n->len == 0) 1005 continue; 1006 if (strncasecmp(s, n->name, n->len) == 0) { 1007 if (i == 5) 1008 return (-1); 1009 return (i + 1); 1010 } 1011 } 1012 return (0); 1013 } 1014 1015 static int 1016 parseoffset(char *s) 1017 { 1018 return strtol(s, NULL, 10); 1019 } 1020 1021 static char * 1022 floattotime(double f) 1023 { 1024 static char buf[100]; 1025 int hh, mm, ss, i; 1026 1027 f -= floor(f); 1028 i = f * SECSPERDAY; 1029 1030 hh = i / SECSPERHOUR; 1031 i %= SECSPERHOUR; 1032 mm = i / SECSPERMINUTE; 1033 i %= SECSPERMINUTE; 1034 ss = i; 1035 1036 sprintf(buf, "%02d:%02d:%02d", hh, mm, ss); 1037 return (buf); 1038 } 1039 1040 static char * 1041 floattoday(int year, double f) 1042 { 1043 static char buf[100]; 1044 int i, m, d, hh, mm, ss; 1045 int *cumdays = cumdaytab[isleap(year)]; 1046 1047 for (i = 0; 1 + cumdays[i] < f; i++) 1048 ; 1049 m = --i; 1050 d = floor(f - 1 - cumdays[i]); 1051 f -= floor(f); 1052 i = f * SECSPERDAY; 1053 1054 hh = i / SECSPERHOUR; 1055 i %= SECSPERHOUR; 1056 mm = i / SECSPERMINUTE; 1057 i %= SECSPERMINUTE; 1058 ss = i; 1059 1060 sprintf(buf, "%02d-%02d %02d:%02d:%02d", m, d, hh, mm, ss); 1061 return (buf); 1062 } 1063 1064 void 1065 dodebug(char *what) 1066 { 1067 int year; 1068 1069 printf("UTCOffset: %g\n", UTCOffset); 1070 printf("eastlongitude: %d\n", EastLongitude); 1071 1072 if (strcmp(what, "moon") == 0) { 1073 double ffullmoon[MAXMOONS], fnewmoon[MAXMOONS]; 1074 int i; 1075 1076 for (year = year1; year <= year2; year++) { 1077 fpom(year, UTCOffset, ffullmoon, fnewmoon); 1078 printf("Full moon %d:\t", year); 1079 for (i = 0; ffullmoon[i] >= 0; i++) { 1080 printf("%g (%s) ", ffullmoon[i], 1081 floattoday(year, ffullmoon[i])); 1082 } 1083 printf("\nNew moon %d:\t", year); 1084 for (i = 0; fnewmoon[i] >= 0; i++) { 1085 printf("%g (%s) ", fnewmoon[i], 1086 floattoday(year, fnewmoon[i])); 1087 } 1088 printf("\n"); 1089 1090 } 1091 1092 return; 1093 } 1094 1095 if (strcmp(what, "sun") == 0) { 1096 double equinoxdays[2], solsticedays[2]; 1097 for (year = year1; year <= year2; year++) { 1098 printf("Sun in %d:\n", year); 1099 fequinoxsolstice(year, UTCOffset, equinoxdays, 1100 solsticedays); 1101 printf("e[0] - %g (%s)\n", 1102 equinoxdays[0], 1103 floattoday(year, equinoxdays[0])); 1104 printf("e[1] - %g (%s)\n", 1105 equinoxdays[1], 1106 floattoday(year, equinoxdays[1])); 1107 printf("s[0] - %g (%s)\n", 1108 solsticedays[0], 1109 floattoday(year, solsticedays[0])); 1110 printf("s[1] - %g (%s)\n", 1111 solsticedays[1], 1112 floattoday(year, solsticedays[1])); 1113 } 1114 return; 1115 } 1116 } 1117