/usr.bin/calendar/parsedata.c
C | 1076 lines | 860 code | 95 blank | 121 comment | 289 complexity | 5aa8229c0bda6508a69c457f54a3476c MD5 | raw file
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 40static char *showflags(int flags); 41static int isonlydigits(char *s, int nostar); 42static const char *getmonthname(int i); 43static int checkmonth(char *s, size_t *len, size_t *offset, const char **month); 44static const char *getdayofweekname(int i); 45static int checkdayofweek(char *s, size_t *len, size_t *offset, const char **dow); 46static int indextooffset(char *s); 47static int parseoffset(char *s); 48static char *floattoday(int year, double f); 49static char *floattotime(double f); 50 51/* 52 * Expected styles: 53 * 54 * Date ::= Month . ' ' . DayOfMonth | 55 * Month . ' ' . DayOfWeek . ModifierIndex | 56 * Month . '/' . DayOfMonth | 57 * Month . '/' . DayOfWeek . ModifierIndex | 58 * DayOfMonth . ' ' . Month | 59 * DayOfMonth . '/' . Month | 60 * DayOfWeek . ModifierIndex . ' ' .Month | 61 * DayOfWeek . ModifierIndex . '/' .Month | 62 * DayOfWeek . ModifierIndex | 63 * SpecialDay . ModifierOffset 64 * 65 * Month ::= MonthName | MonthNumber | '*' 66 * MonthNumber ::= '0' ... '9' | '00' ... '09' | '10' ... '12' 67 * MonthName ::= MonthNameShort | MonthNameLong 68 * MonthNameLong ::= 'January' ... 'December' 69 * MonthNameShort ::= 'Jan' ... 'Dec' | 'Jan.' ... 'Dec.' 70 * 71 * DayOfWeek ::= DayOfWeekShort | DayOfWeekLong 72 * DayOfWeekShort ::= 'Mon' .. 'Sun' 73 * DayOfWeekLong ::= 'Monday' .. 'Sunday' 74 * DayOfMonth ::= '0' ... '9' | '00' ... '09' | '10' ... '29' | 75 * '30' ... '31' | '*' 76 * 77 * ModifierOffset ::= '' | '+' . ModifierNumber | '-' . ModifierNumber 78 * ModifierNumber ::= '0' ... '9' | '00' ... '99' | '000' ... '299' | 79 * '300' ... '359' | '360' ... '365' 80 * ModifierIndex ::= 'Second' | 'Third' | 'Fourth' | 'Fifth' | 81 * 'First' | 'Last' 82 * 83 * SpecialDay ::= 'Easter' | 'Paskha' | 'ChineseNewYear' 84 * 85 */ 86static int 87determinestyle(char *date, int *flags, 88 char *month, int *imonth, char *dayofmonth, int *idayofmonth, 89 char *dayofweek, int *idayofweek, char *modifieroffset, 90 char *modifierindex, char *specialday, char *year, int *iyear) 91{ 92 char *p, *p1, *p2, *py; 93 const char *dow, *pmonth; 94 char pold; 95 size_t len, offset; 96 97 *flags = F_NONE; 98 *month = '\0'; 99 *imonth = 0; 100 *year = '\0'; 101 *iyear = 0; 102 *dayofmonth = '\0'; 103 *idayofmonth = 0; 104 *dayofweek = '\0'; 105 *idayofweek = 0; 106 *modifieroffset = '\0'; 107 *modifierindex = '\0'; 108 *specialday = '\0'; 109 110#define CHECKSPECIAL(s1, s2, lens2, type) \ 111 if (s2 != NULL && strncmp(s1, s2, lens2) == 0) { \ 112 *flags |= F_SPECIALDAY; \ 113 *flags |= type; \ 114 *flags |= F_VARIABLE; \ 115 if (strlen(s1) == lens2) { \ 116 strcpy(specialday, s1); \ 117 return (1); \ 118 } \ 119 strncpy(specialday, s1, lens2); \ 120 specialday[lens2] = '\0'; \ 121 strcpy(modifieroffset, s1 + lens2); \ 122 *flags |= F_MODIFIEROFFSET; \ 123 return (1); \ 124 } 125 126 if ((p = strchr(date, ' ')) == NULL) { 127 if ((p = strchr(date, '/')) == NULL) { 128 CHECKSPECIAL(date, STRING_CNY, strlen(STRING_CNY), 129 F_CNY); 130 CHECKSPECIAL(date, ncny.name, ncny.len, F_CNY); 131 CHECKSPECIAL(date, STRING_NEWMOON, 132 strlen(STRING_NEWMOON), F_NEWMOON); 133 CHECKSPECIAL(date, nnewmoon.name, nnewmoon.len, 134 F_NEWMOON); 135 CHECKSPECIAL(date, STRING_FULLMOON, 136 strlen(STRING_FULLMOON), F_FULLMOON); 137 CHECKSPECIAL(date, nfullmoon.name, nfullmoon.len, 138 F_FULLMOON); 139 CHECKSPECIAL(date, STRING_PASKHA, 140 strlen(STRING_PASKHA), F_PASKHA); 141 CHECKSPECIAL(date, npaskha.name, npaskha.len, F_PASKHA); 142 CHECKSPECIAL(date, STRING_EASTER, 143 strlen(STRING_EASTER), F_EASTER); 144 CHECKSPECIAL(date, neaster.name, neaster.len, F_EASTER); 145 CHECKSPECIAL(date, STRING_MAREQUINOX, 146 strlen(STRING_MAREQUINOX), F_MAREQUINOX); 147 CHECKSPECIAL(date, nmarequinox.name, nmarequinox.len, 148 F_SEPEQUINOX); 149 CHECKSPECIAL(date, STRING_SEPEQUINOX, 150 strlen(STRING_SEPEQUINOX), F_SEPEQUINOX); 151 CHECKSPECIAL(date, nsepequinox.name, nsepequinox.len, 152 F_SEPEQUINOX); 153 CHECKSPECIAL(date, STRING_JUNSOLSTICE, 154 strlen(STRING_JUNSOLSTICE), F_JUNSOLSTICE); 155 CHECKSPECIAL(date, njunsolstice.name, njunsolstice.len, 156 F_JUNSOLSTICE); 157 CHECKSPECIAL(date, STRING_DECSOLSTICE, 158 strlen(STRING_DECSOLSTICE), F_DECSOLSTICE); 159 CHECKSPECIAL(date, ndecsolstice.name, ndecsolstice.len, 160 F_DECSOLSTICE); 161 if (checkdayofweek(date, &len, &offset, &dow) != 0) { 162 *flags |= F_DAYOFWEEK; 163 *flags |= F_VARIABLE; 164 *idayofweek = offset; 165 if (strlen(date) == len) { 166 strcpy(dayofweek, date); 167 return (1); 168 } 169 strncpy(dayofweek, date, len); 170 dayofweek[len] = '\0'; 171 strcpy(modifierindex, date + len); 172 *flags |= F_MODIFIERINDEX; 173 return (1); 174 } 175 if (isonlydigits(date, 1)) { 176 /* Assume month number only */ 177 *flags |= F_MONTH; 178 *imonth = (int)strtol(date, (char **)NULL, 10); 179 strcpy(month, getmonthname(*imonth)); 180 return(1); 181 } 182 return (0); 183 } 184 } 185 186 /* 187 * AFTER this, leave by goto-ing to "allfine" or "fail" to restore the 188 * original data in `date'. 189 */ 190 pold = *p; 191 *p = 0; 192 p1 = date; 193 p2 = p + 1; 194 /* Now p2 points to the next field and p1 to the first field */ 195 196 if ((py = strchr(p2, '/')) != NULL) { 197 /* We have a year in the string. Now this is getting tricky */ 198 strcpy(year, p1); 199 *iyear = (int)strtol(year, NULL, 10); 200 p1 = p2; 201 p2 = py + 1; 202 *py = 0; 203 *flags |= F_YEAR; 204 } 205 206 /* 207 printf("p1: %s\n", p1); 208 printf("p2: %s\n", p2); 209 printf("year: %s\n", year); 210 */ 211 212 /* Check if there is a month-string in the date */ 213 if ((checkmonth(p1, &len, &offset, &pmonth) != 0) 214 || (checkmonth(p2, &len, &offset, &pmonth) != 0 && (p2 = p1))) { 215 /* p2 is the non-month part */ 216 *flags |= F_MONTH; 217 *imonth = offset; 218 219 strcpy(month, getmonthname(offset)); 220 if (isonlydigits(p2, 1)) { 221 strcpy(dayofmonth, p2); 222 *idayofmonth = (int)strtol(p2, (char **)NULL, 10); 223 *flags |= F_DAYOFMONTH; 224 goto allfine; 225 } 226 if (strcmp(p2, "*") == 0) { 227 *flags |= F_ALLDAY; 228 goto allfine; 229 } 230 231 if (checkdayofweek(p2, &len, &offset, &dow) != 0) { 232 *flags |= F_DAYOFWEEK; 233 *flags |= F_VARIABLE; 234 *idayofweek = offset; 235 strcpy(dayofweek, getdayofweekname(offset)); 236 if (strlen(p2) == len) 237 goto allfine; 238 strcpy(modifierindex, p2 + len); 239 *flags |= F_MODIFIERINDEX; 240 goto allfine; 241 } 242 243 goto fail; 244 } 245 246 /* Check if there is an every-day or every-month in the string */ 247 if ((strcmp(p1, "*") == 0 && isonlydigits(p2, 1)) 248 || (strcmp(p2, "*") == 0 && isonlydigits(p1, 1) && (p2 = p1))) { 249 int d; 250 251 *flags |= F_ALLMONTH; 252 *flags |= F_DAYOFMONTH; 253 d = (int)strtol(p2, (char **)NULL, 10); 254 *idayofmonth = d; 255 sprintf(dayofmonth, "%d", d); 256 goto allfine; 257 } 258 259 /* Month as a number, then a weekday */ 260 if (isonlydigits(p1, 1) 261 && checkdayofweek(p2, &len, &offset, &dow) != 0) { 262 int d; 263 264 *flags |= F_MONTH; 265 *flags |= F_DAYOFWEEK; 266 *flags |= F_VARIABLE; 267 268 *idayofweek = offset; 269 d = (int)strtol(p1, (char **)NULL, 10); 270 *imonth = d; 271 strcpy(month, getmonthname(d)); 272 273 strcpy(dayofweek, getdayofweekname(offset)); 274 if (strlen(p2) == len) 275 goto allfine; 276 strcpy(modifierindex, p2 + len); 277 *flags |= F_MODIFIERINDEX; 278 goto allfine; 279 } 280 281 /* If both the month and date are specified as numbers */ 282 if (isonlydigits(p1, 1) && isonlydigits(p2, 0)) { 283 /* Now who wants to be this ambigious? :-( */ 284 int m, d; 285 286 if (strchr(p2, '*') != NULL) 287 *flags |= F_VARIABLE; 288 289 m = (int)strtol(p1, (char **)NULL, 10); 290 d = (int)strtol(p2, (char **)NULL, 10); 291 292 *flags |= F_MONTH; 293 *flags |= F_DAYOFMONTH; 294 295 if (m > 12) { 296 *imonth = d; 297 *idayofmonth = m; 298 strcpy(month, getmonthname(d)); 299 sprintf(dayofmonth, "%d", m); 300 } else { 301 *imonth = m; 302 *idayofmonth = d; 303 strcpy(month, getmonthname(m)); 304 sprintf(dayofmonth, "%d", d); 305 } 306 goto allfine; 307 } 308 309 /* FALLTHROUGH */ 310fail: 311 *p = pold; 312 return (0); 313allfine: 314 *p = pold; 315 return (1); 316 317} 318 319static void 320remember(int *rememberindex, int *y, int *m, int *d, char **ed, int yy, int mm, 321 int dd, char *extra) 322{ 323 static int warned = 0; 324 325 if (*rememberindex >= MAXCOUNT - 1) { 326 if (warned == 0) 327 warnx("Index > %d, ignored", MAXCOUNT); 328 warned++; 329 return; 330 } 331 y[*rememberindex] = yy; 332 m[*rememberindex] = mm; 333 d[*rememberindex] = dd; 334 if (extra != NULL) 335 strcpy(ed[*rememberindex], extra); 336 else 337 ed[*rememberindex][0] = '\0'; 338 *rememberindex += 1; 339} 340 341static void 342debug_determinestyle(int dateonly, char *date, int flags, char *month, 343 int imonth, char *dayofmonth, int idayofmonth, char *dayofweek, 344 int idayofweek, char *modifieroffset, char *modifierindex, char *specialday, 345 char *year, int iyear) 346{ 347 348 if (dateonly != 0) { 349 printf("-------\ndate: |%s|\n", date); 350 if (dateonly == 1) 351 return; 352 } 353 printf("flags: %x - %s\n", flags, showflags(flags)); 354 if (modifieroffset[0] != '\0') 355 printf("modifieroffset: |%s|\n", modifieroffset); 356 if (modifierindex[0] != '\0') 357 printf("modifierindex: |%s|\n", modifierindex); 358 if (year[0] != '\0') 359 printf("year: |%s| (%d)\n", year, iyear); 360 if (month[0] != '\0') 361 printf("month: |%s| (%d)\n", month, imonth); 362 if (dayofmonth[0] != '\0') 363 printf("dayofmonth: |%s| (%d)\n", dayofmonth, idayofmonth); 364 if (dayofweek[0] != '\0') 365 printf("dayofweek: |%s| (%d)\n", dayofweek, idayofweek); 366 if (specialday[0] != '\0') 367 printf("specialday: |%s|\n", specialday); 368} 369 370struct yearinfo { 371 int year; 372 int ieaster, ipaskha, firstcnyday; 373 double ffullmoon[MAXMOONS], fnewmoon[MAXMOONS]; 374 double ffullmooncny[MAXMOONS], fnewmooncny[MAXMOONS]; 375 int ichinesemonths[MAXMOONS]; 376 double equinoxdays[2], solsticedays[2]; 377 int *mondays; 378 struct yearinfo *next; 379}; 380/* 381 * Possible date formats include any combination of: 382 * 3-charmonth (January, Jan, Jan) 383 * 3-charweekday (Friday, Monday, mon.) 384 * numeric month or day (1, 2, 04) 385 * 386 * Any character may separate them, or they may not be separated. Any line, 387 * following a line that is matched, that starts with "whitespace", is shown 388 * along with the matched line. 389 */ 390int 391parsedaymonth(char *date, int *yearp, int *monthp, int *dayp, int *flags, 392 char **edp) 393{ 394 char month[100], dayofmonth[100], dayofweek[100], modifieroffset[100]; 395 char syear[100]; 396 char modifierindex[100], specialday[100]; 397 int idayofweek = -1, imonth = -1, idayofmonth = -1, iyear = -1; 398 int year, remindex; 399 int d, m, dow, rm, rd, offset; 400 char *ed; 401 int retvalsign = 1; 402 403 static struct yearinfo *years, *yearinfo; 404 405 /* 406 * CONVENTION 407 * 408 * Month: 1-12 409 * Monthname: Jan .. Dec 410 * Day: 1-31 411 * Weekday: Mon .. Sun 412 * 413 */ 414 415 *flags = 0; 416 417 if (debug) 418 debug_determinestyle(1, date, *flags, month, imonth, 419 dayofmonth, idayofmonth, dayofweek, idayofweek, 420 modifieroffset, modifierindex, specialday, syear, iyear); 421 if (determinestyle(date, flags, month, &imonth, dayofmonth, 422 &idayofmonth, dayofweek, &idayofweek, modifieroffset, 423 modifierindex, specialday, syear, &iyear) == 0) { 424 if (debug) 425 printf("Failed!\n"); 426 return (0); 427 } 428 429 if (debug) 430 debug_determinestyle(0, date, *flags, month, imonth, 431 dayofmonth, idayofmonth, dayofweek, idayofweek, 432 modifieroffset, modifierindex, specialday, syear, iyear); 433 434 remindex = 0; 435 for (year = year1; year <= year2; year++) { 436 437 int lflags = *flags; 438 /* If the year is specified, only do it if it is this year! */ 439 if ((lflags & F_YEAR) != 0) 440 if (iyear != year) 441 continue; 442 lflags &= ~F_YEAR; 443 444 /* Get important dates for this year */ 445 yearinfo = years; 446 while (yearinfo != NULL) { 447 if (yearinfo->year == year) 448 break; 449 yearinfo = yearinfo -> next; 450 } 451 if (yearinfo == NULL) { 452 yearinfo = (struct yearinfo *)calloc(1, 453 sizeof(struct yearinfo)); 454 if (yearinfo == NULL) 455 errx(1, "Unable to allocate more years"); 456 yearinfo->year = year; 457 yearinfo->next = years; 458 years = yearinfo; 459 460 yearinfo->mondays = mondaytab[isleap(year)]; 461 yearinfo->ieaster = easter(year); 462 yearinfo->ipaskha = paskha(year); 463 fpom(year, UTCOffset, yearinfo->ffullmoon, 464 yearinfo->fnewmoon); 465 fpom(year, UTCOFFSET_CNY, yearinfo->ffullmooncny, 466 yearinfo->fnewmooncny); 467 fequinoxsolstice(year, UTCOffset, 468 yearinfo->equinoxdays, yearinfo->solsticedays); 469 470 /* 471 * CNY: Match day with sun longitude at 330` with new 472 * moon 473 */ 474 yearinfo->firstcnyday = calculatesunlongitude30(year, 475 UTCOFFSET_CNY, yearinfo->ichinesemonths); 476 for (m = 0; yearinfo->fnewmooncny[m] >= 0; m++) { 477 if (yearinfo->fnewmooncny[m] > 478 yearinfo->firstcnyday) { 479 yearinfo->firstcnyday = 480 floor(yearinfo->fnewmooncny[m - 1]); 481 break; 482 } 483 } 484 } 485 486 /* Same day every year */ 487 if (lflags == (F_MONTH | F_DAYOFMONTH)) { 488 if (!remember_ymd(year, imonth, idayofmonth)) 489 continue; 490 remember(&remindex, yearp, monthp, dayp, edp, 491 year, imonth, idayofmonth, NULL); 492 continue; 493 } 494 495 /* XXX Same day every year, but variable */ 496 if (lflags == (F_MONTH | F_DAYOFMONTH | F_VARIABLE)) { 497 if (!remember_ymd(year, imonth, idayofmonth)) 498 continue; 499 remember(&remindex, yearp, monthp, dayp, edp, 500 year, imonth, idayofmonth, NULL); 501 continue; 502 } 503 504 /* Same day every month */ 505 if (lflags == (F_ALLMONTH | F_DAYOFMONTH)) { 506 for (m = 1; m <= 12; m++) { 507 if (!remember_ymd(year, m, idayofmonth)) 508 continue; 509 remember(&remindex, yearp, monthp, dayp, edp, 510 year, m, idayofmonth, NULL); 511 } 512 continue; 513 } 514 515 /* Every day of a month */ 516 if (lflags == (F_ALLDAY | F_MONTH)) { 517 for (d = 1; d <= yearinfo->mondays[imonth]; d++) { 518 if (!remember_ymd(year, imonth, d)) 519 continue; 520 remember(&remindex, yearp, monthp, dayp, edp, 521 year, imonth, d, NULL); 522 } 523 continue; 524 } 525 526 /* One day of every month */ 527 if (lflags == (F_ALLMONTH | F_DAYOFWEEK)) { 528 for (m = 1; m <= 12; m++) { 529 if (!remember_ymd(year, m, idayofmonth)) 530 continue; 531 remember(&remindex, yearp, monthp, dayp, edp, 532 year, m, idayofmonth, NULL); 533 } 534 continue; 535 } 536 537 /* Every dayofweek of the year */ 538 if (lflags == (F_DAYOFWEEK | F_VARIABLE)) { 539 dow = first_dayofweek_of_year(year); 540 d = (idayofweek - dow + 8) % 7; 541 while (d <= 366) { 542 if (remember_yd(year, d, &rm, &rd)) 543 remember(&remindex, 544 yearp, monthp, dayp, edp, 545 year, rm, rd, NULL); 546 d += 7; 547 } 548 continue; 549 } 550 551 /* Every so-manied dayofweek of every month of the year */ 552 if (lflags == (F_DAYOFWEEK | F_MODIFIERINDEX | F_VARIABLE)) { 553 offset = indextooffset(modifierindex); 554 555 for (m = 0; m < 12; m++) { 556 dow = first_dayofweek_of_month(year, m); 557 d = (idayofweek - dow + 8) % 7; 558 d += (offset - 1) * 7; 559 if (remember_ymd(year, m, d)) { 560 remember(&remindex, 561 yearp, monthp, dayp, edp, 562 year, m, d, NULL); 563 continue; 564 } 565 } 566 continue; 567 } 568 569 /* A certain dayofweek of a month */ 570 if (lflags == 571 (F_MONTH | F_DAYOFWEEK | F_MODIFIERINDEX | F_VARIABLE)) { 572 offset = indextooffset(modifierindex); 573 dow = first_dayofweek_of_month(year, imonth); 574 d = (idayofweek - dow + 8) % 7; 575 576 if (offset > 0) { 577 while (d <= yearinfo->mondays[imonth]) { 578 if (--offset == 0 579 && remember_ymd(year, imonth, d)) { 580 remember(&remindex, 581 yearp, monthp, dayp, edp, 582 year, imonth, d, NULL); 583 continue; 584 } 585 d += 7; 586 } 587 continue; 588 } 589 if (offset < 0) { 590 while (d <= yearinfo->mondays[imonth]) 591 d += 7; 592 while (offset != 0) { 593 offset++; 594 d -= 7; 595 } 596 if (remember_ymd(year, imonth, d)) 597 remember(&remindex, 598 yearp, monthp, dayp, edp, 599 year, imonth, d, NULL); 600 continue; 601 } 602 continue; 603 } 604 605 /* Every dayofweek of the month */ 606 if (lflags == (F_DAYOFWEEK | F_MONTH | F_VARIABLE)) { 607 dow = first_dayofweek_of_month(year, imonth); 608 d = (idayofweek - dow + 8) % 7; 609 while (d <= yearinfo->mondays[imonth]) { 610 if (remember_ymd(year, imonth, d)) 611 remember(&remindex, 612 yearp, monthp, dayp, edp, 613 year, imonth, d, NULL); 614 d += 7; 615 } 616 continue; 617 } 618 619 /* Easter */ 620 if ((lflags & ~F_MODIFIEROFFSET) == 621 (F_SPECIALDAY | F_VARIABLE | F_EASTER)) { 622 offset = 0; 623 if ((lflags & F_MODIFIEROFFSET) != 0) 624 offset = parseoffset(modifieroffset); 625 if (remember_yd(year, yearinfo->ieaster + offset, 626 &rm, &rd)) 627 remember(&remindex, yearp, monthp, dayp, edp, 628 year, rm, rd, NULL); 629 continue; 630 } 631 632 /* Paskha */ 633 if ((lflags & ~F_MODIFIEROFFSET) == 634 (F_SPECIALDAY | F_VARIABLE | F_PASKHA)) { 635 offset = 0; 636 if ((lflags & F_MODIFIEROFFSET) != 0) 637 offset = parseoffset(modifieroffset); 638 if (remember_yd(year, yearinfo->ipaskha + offset, 639 &rm, &rd)) 640 remember(&remindex, yearp, monthp, dayp, edp, 641 year, rm, rd, NULL); 642 continue; 643 } 644 645 /* Chinese New Year */ 646 if ((lflags & ~F_MODIFIEROFFSET) == 647 (F_SPECIALDAY | F_VARIABLE | F_CNY)) { 648 offset = 0; 649 if ((lflags & F_MODIFIEROFFSET) != 0) 650 offset = parseoffset(modifieroffset); 651 if (remember_yd(year, yearinfo->firstcnyday + offset, 652 &rm, &rd)) 653 remember(&remindex, yearp, monthp, dayp, edp, 654 year, rm, rd, NULL); 655 continue; 656 } 657 658 /* FullMoon */ 659 if ((lflags & ~F_MODIFIEROFFSET) == 660 (F_SPECIALDAY | F_VARIABLE | F_FULLMOON)) { 661 int i; 662 663 offset = 0; 664 if ((lflags & F_MODIFIEROFFSET) != 0) 665 offset = parseoffset(modifieroffset); 666 for (i = 0; yearinfo->ffullmoon[i] > 0; i++) { 667 if (remember_yd(year, 668 floor(yearinfo->ffullmoon[i]) + offset, 669 &rm, &rd)) { 670 ed = floattotime( 671 yearinfo->ffullmoon[i]); 672 remember(&remindex, 673 yearp, monthp, dayp, edp, 674 year, rm, rd, ed); 675 } 676 } 677 continue; 678 } 679 680 /* NewMoon */ 681 if ((lflags & ~F_MODIFIEROFFSET) == 682 (F_SPECIALDAY | F_VARIABLE | F_NEWMOON)) { 683 int i; 684 685 offset = 0; 686 if ((lflags & F_MODIFIEROFFSET) != 0) 687 offset = parseoffset(modifieroffset); 688 for (i = 0; yearinfo->ffullmoon[i] > 0; i++) { 689 if (remember_yd(year, 690 floor(yearinfo->fnewmoon[i]) + offset, 691 &rm, &rd)) { 692 ed = floattotime(yearinfo->fnewmoon[i]); 693 remember(&remindex, 694 yearp, monthp, dayp, edp, 695 year, rm, rd, ed); 696 } 697 } 698 continue; 699 } 700 701 /* (Mar|Sep)Equinox */ 702 if ((lflags & ~F_MODIFIEROFFSET) == 703 (F_SPECIALDAY | F_VARIABLE | F_MAREQUINOX)) { 704 offset = 0; 705 if ((lflags & F_MODIFIEROFFSET) != 0) 706 offset = parseoffset(modifieroffset); 707 if (remember_yd(year, yearinfo->equinoxdays[0] + offset, 708 &rm, &rd)) { 709 ed = floattotime(yearinfo->equinoxdays[0]); 710 remember(&remindex, yearp, monthp, dayp, edp, 711 year, rm, rd, ed); 712 } 713 continue; 714 } 715 if ((lflags & ~F_MODIFIEROFFSET) == 716 (F_SPECIALDAY | F_VARIABLE | F_SEPEQUINOX)) { 717 offset = 0; 718 if ((lflags & F_MODIFIEROFFSET) != 0) 719 offset = parseoffset(modifieroffset); 720 if (remember_yd(year, yearinfo->equinoxdays[1] + offset, 721 &rm, &rd)) { 722 ed = floattotime(yearinfo->equinoxdays[1]); 723 remember(&remindex, yearp, monthp, dayp, edp, 724 year, rm, rd, ed); 725 } 726 continue; 727 } 728 729 /* (Jun|Dec)Solstice */ 730 if ((lflags & ~F_MODIFIEROFFSET) == 731 (F_SPECIALDAY | F_VARIABLE | F_JUNSOLSTICE)) { 732 offset = 0; 733 if ((lflags & F_MODIFIEROFFSET) != 0) 734 offset = parseoffset(modifieroffset); 735 if (remember_yd(year, 736 yearinfo->solsticedays[0] + offset, &rm, &rd)) { 737 ed = floattotime(yearinfo->solsticedays[0]); 738 remember(&remindex, yearp, monthp, dayp, edp, 739 year, rm, rd, ed); 740 } 741 continue; 742 } 743 if ((lflags & ~F_MODIFIEROFFSET) == 744 (F_SPECIALDAY | F_VARIABLE | F_DECSOLSTICE)) { 745 offset = 0; 746 if ((lflags & F_MODIFIEROFFSET) != 0) 747 offset = parseoffset(modifieroffset); 748 if (remember_yd(year, 749 yearinfo->solsticedays[1] + offset, &rm, &rd)) { 750 ed = floattotime(yearinfo->solsticedays[1]); 751 remember(&remindex, yearp, monthp, dayp, edp, 752 year, rm, rd, ed); 753 } 754 continue; 755 } 756 757 if (debug) { 758 printf("Unprocessed:\n"); 759 debug_determinestyle(2, date, lflags, month, imonth, 760 dayofmonth, idayofmonth, dayofweek, idayofweek, 761 modifieroffset, modifierindex, specialday, syear, 762 iyear); 763 } 764 retvalsign = -1; 765 } 766 767 if (retvalsign == -1) 768 return (-remindex - 1); 769 else 770 return (remindex); 771} 772 773static char * 774showflags(int flags) 775{ 776 static char s[1000]; 777 s[0] = '\0'; 778 779 if ((flags & F_YEAR) != 0) 780 strcat(s, "year "); 781 if ((flags & F_MONTH) != 0) 782 strcat(s, "month "); 783 if ((flags & F_DAYOFWEEK) != 0) 784 strcat(s, "dayofweek "); 785 if ((flags & F_DAYOFMONTH) != 0) 786 strcat(s, "dayofmonth "); 787 if ((flags & F_MODIFIERINDEX) != 0) 788 strcat(s, "modifierindex "); 789 if ((flags & F_MODIFIEROFFSET) != 0) 790 strcat(s, "modifieroffset "); 791 if ((flags & F_SPECIALDAY) != 0) 792 strcat(s, "specialday "); 793 if ((flags & F_ALLMONTH) != 0) 794 strcat(s, "allmonth "); 795 if ((flags & F_ALLDAY) != 0) 796 strcat(s, "allday "); 797 if ((flags & F_VARIABLE) != 0) 798 strcat(s, "variable "); 799 if ((flags & F_CNY) != 0) 800 strcat(s, "chinesenewyear "); 801 if ((flags & F_PASKHA) != 0) 802 strcat(s, "paskha "); 803 if ((flags & F_EASTER) != 0) 804 strcat(s, "easter "); 805 if ((flags & F_FULLMOON) != 0) 806 strcat(s, "fullmoon "); 807 if ((flags & F_NEWMOON) != 0) 808 strcat(s, "newmoon "); 809 if ((flags & F_MAREQUINOX) != 0) 810 strcat(s, "marequinox "); 811 if ((flags & F_SEPEQUINOX) != 0) 812 strcat(s, "sepequinox "); 813 if ((flags & F_JUNSOLSTICE) != 0) 814 strcat(s, "junsolstice "); 815 if ((flags & F_DECSOLSTICE) != 0) 816 strcat(s, "decsolstice "); 817 818 return s; 819} 820 821static const char * 822getmonthname(int i) 823{ 824 if (i <= 0 || i > 12) 825 return (""); 826 if (nmonths[i - 1].len != 0 && nmonths[i - 1].name != NULL) 827 return (nmonths[i - 1].name); 828 return (months[i - 1]); 829} 830 831static int 832checkmonth(char *s, size_t *len, size_t *offset, const char **month) 833{ 834 struct fixs *n; 835 int i; 836 837 for (i = 0; fnmonths[i].name != NULL; i++) { 838 n = fnmonths + i; 839 if (strncasecmp(s, n->name, n->len) == 0) { 840 *len = n->len; 841 *month = n->name; 842 *offset = i + 1; 843 return (1); 844 } 845 } 846 for (i = 0; nmonths[i].name != NULL; i++) { 847 n = nmonths + i; 848 if (strncasecmp(s, n->name, n->len) == 0) { 849 *len = n->len; 850 *month = n->name; 851 *offset = i + 1; 852 return (1); 853 } 854 } 855 for (i = 0; fmonths[i] != NULL; i++) { 856 *len = strlen(fmonths[i]); 857 if (strncasecmp(s, fmonths[i], *len) == 0) { 858 *month = fmonths[i]; 859 *offset = i + 1; 860 return (1); 861 } 862 } 863 for (i = 0; months[i] != NULL; i++) { 864 if (strncasecmp(s, months[i], 3) == 0) { 865 *len = 3; 866 *month = months[i]; 867 *offset = i + 1; 868 return (1); 869 } 870 } 871 return (0); 872} 873 874static const char * 875getdayofweekname(int i) 876{ 877 if (ndays[i].len != 0 && ndays[i].name != NULL) 878 return (ndays[i].name); 879 return (days[i]); 880} 881 882static int 883checkdayofweek(char *s, size_t *len, size_t *offset, const char **dow) 884{ 885 struct fixs *n; 886 int i; 887 888 for (i = 0; fndays[i].name != NULL; i++) { 889 n = fndays + i; 890 if (strncasecmp(s, n->name, n->len) == 0) { 891 *len = n->len; 892 *dow = n->name; 893 *offset = i; 894 return (1); 895 } 896 } 897 for (i = 0; ndays[i].name != NULL; i++) { 898 n = ndays + i; 899 if (strncasecmp(s, n->name, n->len) == 0) { 900 *len = n->len; 901 *dow = n->name; 902 *offset = i; 903 return (1); 904 } 905 } 906 for (i = 0; fdays[i] != NULL; i++) { 907 *len = strlen(fdays[i]); 908 if (strncasecmp(s, fdays[i], *len) == 0) { 909 *dow = fdays[i]; 910 *offset = i; 911 return (1); 912 } 913 } 914 for (i = 0; days[i] != NULL; i++) { 915 if (strncasecmp(s, days[i], 3) == 0) { 916 *len = 3; 917 *dow = days[i]; 918 *offset = i; 919 return (1); 920 } 921 } 922 return (0); 923} 924 925static int 926isonlydigits(char *s, int nostar) 927{ 928 int i; 929 for (i = 0; s[i] != '\0'; i++) { 930 if (nostar == 0 && s[i] == '*' && s[i + 1] == '\0') 931 return 1; 932 if (!isdigit((unsigned char)s[i])) 933 return (0); 934 } 935 return (1); 936} 937 938static int 939indextooffset(char *s) 940{ 941 int i; 942 struct fixs *n; 943 944 if (s[0] == '+' || s[0] == '-') { 945 char ss[9]; 946 for (i = -100; i < 100; i++) { 947 sprintf(ss, "%s%d", (i > 0) ? "+" : "", i); 948 if (strcmp(ss, s) == 0) 949 return (i); 950 } 951 return (0); 952 } 953 954 for (i = 0; i < 6; i++) { 955 if (strcasecmp(s, sequences[i]) == 0) { 956 if (i == 5) 957 return (-1); 958 return (i + 1); 959 } 960 } 961 for (i = 0; i < 6; i++) { 962 n = nsequences + i; 963 if (n->len == 0) 964 continue; 965 if (strncasecmp(s, n->name, n->len) == 0) { 966 if (i == 5) 967 return (-1); 968 return (i + 1); 969 } 970 } 971 return (0); 972} 973 974static int 975parseoffset(char *s) 976{ 977 978 return strtol(s, NULL, 10); 979} 980 981static char * 982floattotime(double f) 983{ 984 static char buf[100]; 985 int hh, mm, ss, i; 986 987 f -= floor(f); 988 i = f * SECSPERDAY; 989 990 hh = i / SECSPERHOUR; 991 i %= SECSPERHOUR; 992 mm = i / SECSPERMINUTE; 993 i %= SECSPERMINUTE; 994 ss = i; 995 996 sprintf(buf, "%02d:%02d:%02d", hh, mm, ss); 997 return (buf); 998} 999 1000static char * 1001floattoday(int year, double f) 1002{ 1003 static char buf[100]; 1004 int i, m, d, hh, mm, ss; 1005 int *cumdays = cumdaytab[isleap(year)]; 1006 1007 for (i = 0; 1 + cumdays[i] < f; i++) 1008 ; 1009 m = --i; 1010 d = floor(f - 1 - cumdays[i]); 1011 f -= floor(f); 1012 i = f * SECSPERDAY; 1013 1014 hh = i / SECSPERHOUR; 1015 i %= SECSPERHOUR; 1016 mm = i / SECSPERMINUTE; 1017 i %= SECSPERMINUTE; 1018 ss = i; 1019 1020 sprintf(buf, "%02d-%02d %02d:%02d:%02d", m, d, hh, mm, ss); 1021 return (buf); 1022} 1023 1024void 1025dodebug(char *what) 1026{ 1027 int year; 1028 1029 printf("UTCOffset: %g\n", UTCOffset); 1030 printf("eastlongitude: %d\n", EastLongitude); 1031 1032 if (strcmp(what, "moon") == 0) { 1033 double ffullmoon[MAXMOONS], fnewmoon[MAXMOONS]; 1034 int i; 1035 1036 for (year = year1; year <= year2; year++) { 1037 fpom(year, UTCOffset, ffullmoon, fnewmoon); 1038 printf("Full moon %d:\t", year); 1039 for (i = 0; ffullmoon[i] >= 0; i++) { 1040 printf("%g (%s) ", ffullmoon[i], 1041 floattoday(year, ffullmoon[i])); 1042 } 1043 printf("\nNew moon %d:\t", year); 1044 for (i = 0; fnewmoon[i] >= 0; i++) { 1045 printf("%g (%s) ", fnewmoon[i], 1046 floattoday(year, fnewmoon[i])); 1047 } 1048 printf("\n"); 1049 1050 } 1051 1052 return; 1053 } 1054 1055 if (strcmp(what, "sun") == 0) { 1056 double equinoxdays[2], solsticedays[2]; 1057 for (year = year1; year <= year2; year++) { 1058 printf("Sun in %d:\n", year); 1059 fequinoxsolstice(year, UTCOffset, equinoxdays, 1060 solsticedays); 1061 printf("e[0] - %g (%s)\n", 1062 equinoxdays[0], 1063 floattoday(year, equinoxdays[0])); 1064 printf("e[1] - %g (%s)\n", 1065 equinoxdays[1], 1066 floattoday(year, equinoxdays[1])); 1067 printf("s[0] - %g (%s)\n", 1068 solsticedays[0], 1069 floattoday(year, solsticedays[0])); 1070 printf("s[1] - %g (%s)\n", 1071 solsticedays[1], 1072 floattoday(year, solsticedays[1])); 1073 } 1074 return; 1075 } 1076}