1 /*- 2 * Copyright (c) 1997 Wolfgang Helbig 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 #ifndef lint 28 static const char rcsid[] = 29 "$FreeBSD$"; 30 #endif /* not lint */ 31 32 #include <calendar.h> 33 #include <ctype.h> 34 #include <err.h> 35 #include <langinfo.h> 36 #include <locale.h> 37 #include <stdio.h> 38 #include <stdlib.h> 39 #include <string.h> 40 #include <sysexits.h> 41 #include <time.h> 42 #include <unistd.h> 43 44 /* Width of one month with backward compatibility */ 45 #define MONTH_WIDTH_B_J 27 46 #define MONTH_WIDTH_B 20 47 48 #define MONTH_WIDTH_J 24 49 #define MONTH_WIDTH 18 50 51 #define MAX_WIDTH 28 52 53 typedef struct date date; 54 55 struct monthlines { 56 char name[MAX_WIDTH + 1]; 57 char lines[7][MAX_WIDTH + 1]; 58 char weeks[MAX_WIDTH + 1]; 59 }; 60 61 struct weekdays { 62 char names[7][4]; 63 }; 64 65 /* The switches from Julian to Gregorian in some countries */ 66 static struct djswitch { 67 const char *cc; /* Country code according to ISO 3166 */ 68 const char *nm; /* Name of country */ 69 date dt; /* Last day of Julian calendar */ 70 } switches[] = { 71 {"AL", "Albania", {1912, 11, 30}}, 72 {"AT", "Austria", {1583, 10, 5}}, 73 {"AU", "Australia", {1752, 9, 2}}, 74 {"BE", "Belgium", {1582, 12, 14}}, 75 {"BG", "Bulgaria", {1916, 3, 18}}, 76 {"CA", "Canada", {1752, 9, 2}}, 77 {"CH", "Switzerland", {1655, 2, 28}}, 78 {"CN", "China", {1911, 12, 18}}, 79 {"CZ", "Czech Republic",{1584, 1, 6}}, 80 {"DE", "Germany", {1700, 2, 18}}, 81 {"DK", "Denmark", {1700, 2, 18}}, 82 {"ES", "Spain", {1582, 10, 4}}, 83 {"FI", "Finland", {1753, 2, 17}}, 84 {"FR", "France", {1582, 12, 9}}, 85 {"GB", "United Kingdom",{1752, 9, 2}}, 86 {"GR", "Greece", {1924, 3, 9}}, 87 {"HU", "Hungary", {1587, 10, 21}}, 88 {"IS", "Iceland", {1700, 11, 16}}, 89 {"IT", "Italy", {1582, 10, 4}}, 90 {"JP", "Japan", {1918, 12, 18}}, 91 {"LI", "Lithuania", {1918, 2, 1}}, 92 {"LN", "Latin", {9999, 05, 31}}, 93 {"LU", "Luxembourg", {1582, 12, 14}}, 94 {"LV", "Latvia", {1918, 2, 1}}, 95 {"NL", "Netherlands", {1582, 12, 14}}, 96 {"NO", "Norway", {1700, 2, 18}}, 97 {"PL", "Poland", {1582, 10, 4}}, 98 {"PT", "Portugal", {1582, 10, 4}}, 99 {"RO", "Romania", {1919, 3, 31}}, 100 {"RU", "Russia", {1918, 1, 31}}, 101 {"SI", "Slovenia", {1919, 3, 4}}, 102 {"SW", "Sweden", {1753, 2, 17}}, 103 {"TR", "Turkey", {1926, 12, 18}}, 104 {"US", "United States", {1752, 9, 2}}, 105 {"YU", "Yugoslavia", {1919, 3, 4}} 106 }; 107 108 struct djswitch *dftswitch = 109 switches + sizeof(switches) / sizeof(struct djswitch) - 2; 110 /* default switch (should be "US") */ 111 112 /* Table used to print day of month and week numbers */ 113 char daystr[] = " 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15" 114 " 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31" 115 " 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47" 116 " 48 49 50 51 52 53"; 117 118 /* Table used to print day of year and week numbers */ 119 char jdaystr[] = " 1 2 3 4 5 6 7 8 9" 120 " 10 11 12 13 14 15 16 17 18 19" 121 " 20 21 22 23 24 25 26 27 28 29" 122 " 30 31 32 33 34 35 36 37 38 39" 123 " 40 41 42 43 44 45 46 47 48 49" 124 " 50 51 52 53 54 55 56 57 58 59" 125 " 60 61 62 63 64 65 66 67 68 69" 126 " 70 71 72 73 74 75 76 77 78 79" 127 " 80 81 82 83 84 85 86 87 88 89" 128 " 90 91 92 93 94 95 96 97 98 99" 129 " 100 101 102 103 104 105 106 107 108 109" 130 " 110 111 112 113 114 115 116 117 118 119" 131 " 120 121 122 123 124 125 126 127 128 129" 132 " 130 131 132 133 134 135 136 137 138 139" 133 " 140 141 142 143 144 145 146 147 148 149" 134 " 150 151 152 153 154 155 156 157 158 159" 135 " 160 161 162 163 164 165 166 167 168 169" 136 " 170 171 172 173 174 175 176 177 178 179" 137 " 180 181 182 183 184 185 186 187 188 189" 138 " 190 191 192 193 194 195 196 197 198 199" 139 " 200 201 202 203 204 205 206 207 208 209" 140 " 210 211 212 213 214 215 216 217 218 219" 141 " 220 221 222 223 224 225 226 227 228 229" 142 " 230 231 232 233 234 235 236 237 238 239" 143 " 240 241 242 243 244 245 246 247 248 249" 144 " 250 251 252 253 254 255 256 257 258 259" 145 " 260 261 262 263 264 265 266 267 268 269" 146 " 270 271 272 273 274 275 276 277 278 279" 147 " 280 281 282 283 284 285 286 287 288 289" 148 " 290 291 292 293 294 295 296 297 298 299" 149 " 300 301 302 303 304 305 306 307 308 309" 150 " 310 311 312 313 314 315 316 317 318 319" 151 " 320 321 322 323 324 325 326 327 328 329" 152 " 330 331 332 333 334 335 336 337 338 339" 153 " 340 341 342 343 344 345 346 347 348 349" 154 " 350 351 352 353 354 355 356 357 358 359" 155 " 360 361 362 363 364 365 366"; 156 157 int flag_weeks; /* user wants number of week */ 158 int nswitch; /* user defined switch date */ 159 int nswitchb; /* switch date for backward compatibility */ 160 161 char *center(char *s, char *t, int w); 162 void mkmonth(int year, int month, int jd_flag, struct monthlines * monthl); 163 void mkmonthb(int year, int month, int jd_flag, struct monthlines * monthl); 164 void mkweekdays(struct weekdays * wds); 165 int parsemonth(const char *s, int *m, int *y); 166 void printcc(void); 167 void printeaster(int year, int julian, int orthodox); 168 void printmonth(int year, int month, int jd_flag); 169 void printmonthb(int year, int month, int jd_flag); 170 void printyear(int year, int jd_flag); 171 void printyearb(int year, int jd_flag); 172 int firstday(int y, int m); 173 date *sdate(int ndays, struct date * d); 174 date *sdateb(int ndays, struct date * d); 175 int sndays(struct date * d); 176 int sndaysb(struct date * d); 177 static void usage(void); 178 int weekdayb(int nd); 179 180 int 181 main(int argc, char *argv[]) 182 { 183 struct djswitch *p, *q; /* to search user defined switch date */ 184 date never = {10000, 1, 1}; /* outside valid range of dates */ 185 date ukswitch = {1752, 9, 2};/* switch date for Great Britain */ 186 int ch; /* holds the option character */ 187 int m = 0; /* month */ 188 int y = 0; /* year */ 189 int flag_backward = 0; /* user called cal--backward compat. */ 190 int flag_hole_year = 0; /* user wants the whole year */ 191 int flag_julian_cal = 0; /* user wants Julian Calendar */ 192 int flag_julian_day = 0; /* user wants the Julian day 193 * numbers */ 194 int flag_orthodox = 0; /* use wants Orthodox easter */ 195 int flag_easter = 0; /* use wants easter date */ 196 char *cp; /* character pointer */ 197 char *flag_month = NULL; /* requested month as string */ 198 const char *locale; /* locale to get country code */ 199 200 /* 201 * Use locale to determine the country code, 202 * and use the country code to determine the default 203 * switchdate and date format from the switches table. 204 */ 205 if (setlocale(LC_ALL, "") == NULL) 206 warn("setlocale"); 207 locale = setlocale(LC_TIME, NULL); 208 if (locale == NULL || 209 strcmp(locale, "C") == 0 || 210 strcmp(locale, "POSIX") == 0 || 211 strcmp(locale, "ASCII") == 0 || 212 strcmp(locale, "US-ASCII") == 0) 213 locale = "_US"; 214 q = switches + sizeof(switches) / sizeof(struct djswitch); 215 for (p = switches; p != q; p++) 216 if ((cp = strstr(locale, p->cc)) != NULL && *(cp - 1) == '_') 217 break; 218 if (p == q) { 219 nswitch = ndaysj(&dftswitch->dt); 220 } else { 221 nswitch = ndaysj(&p->dt); 222 dftswitch = p; 223 } 224 225 226 /* 227 * Get the filename portion of argv[0] and set flag_backward if 228 * this program is called "cal". 229 */ 230 cp = strrchr(argv[0], '/'); 231 cp = (cp == NULL) ? argv[0] : cp + 1; 232 if (strcmp("cal", cp) == 0) 233 flag_backward = 1; 234 235 /* Set the switch date to United Kingdom if backwards compatible */ 236 if (flag_backward) 237 nswitchb = ndaysj(&ukswitch); 238 239 while ((ch = getopt(argc, argv, "Jejm:ops:wy")) != -1) 240 switch (ch) { 241 case 'J': 242 if (flag_backward) 243 usage(); 244 nswitch = ndaysj(&never); 245 flag_julian_cal = 1; 246 break; 247 case 'e': 248 if (flag_backward) 249 usage(); 250 flag_easter = 1; 251 break; 252 case 'j': 253 flag_julian_day = 1; 254 break; 255 case 'm': 256 flag_month = optarg; 257 break; 258 case 'o': 259 if (flag_backward) 260 usage(); 261 flag_orthodox = 1; 262 flag_easter = 1; 263 break; 264 case 'p': 265 if (flag_backward) 266 usage(); 267 printcc(); 268 return (0); 269 break; 270 case 's': 271 if (flag_backward) 272 usage(); 273 q = switches + 274 sizeof(switches) / sizeof(struct djswitch); 275 for (p = switches; 276 p != q && strcmp(p->cc, optarg) != 0; p++) 277 ; 278 if (p == q) 279 errx(EX_USAGE, 280 "%s: invalid country code", optarg); 281 nswitch = ndaysj(&(p->dt)); 282 break; 283 case 'w': 284 if (flag_backward) 285 usage(); 286 flag_weeks = 1; 287 break; 288 case 'y': 289 flag_hole_year = 1; 290 break; 291 default: 292 usage(); 293 } 294 295 argc -= optind; 296 argv += optind; 297 298 switch (argc) { 299 case 2: 300 if (flag_easter) 301 usage(); 302 flag_month = *argv++; 303 /* FALLTHROUGH */ 304 case 1: 305 y = atoi(*argv++); 306 if (y < 1 || y > 9999) 307 errx(EX_USAGE, "year %d not in range 1..9999", y); 308 break; 309 case 0: 310 { 311 time_t t; 312 struct tm *tm; 313 314 t = time(NULL); 315 tm = localtime(&t); 316 y = tm->tm_year + 1900; 317 m = tm->tm_mon + 1; 318 } 319 break; 320 default: 321 usage(); 322 } 323 324 if (flag_month != NULL) { 325 if (parsemonth(flag_month, &m, &y)) { 326 errx(EX_USAGE, 327 "%s is neither a month number (1..12) nor a name", 328 flag_month); 329 } 330 } 331 332 if (flag_easter) 333 printeaster(y, flag_julian_cal, flag_orthodox); 334 else if (argc == 1 || flag_hole_year) 335 if (flag_backward) 336 printyearb(y, flag_julian_day); 337 else 338 printyear(y, flag_julian_day); 339 else 340 if (flag_backward) 341 printmonthb(y, m, flag_julian_day); 342 else 343 printmonth(y, m, flag_julian_day); 344 345 return (0); 346 } 347 348 static void 349 usage(void) 350 { 351 352 fputs( 353 "usage: cal [-jy] [[month] year]\n" 354 " cal [-j] [-m month] [year]\n" 355 " ncal [-Jjpwy] [-s country_code] [[month] year]\n" 356 " ncal [-Jeo] [year]\n", stderr); 357 exit(EX_USAGE); 358 } 359 360 /* print the assumed switches for all countries */ 361 void 362 printcc(void) 363 { 364 struct djswitch *p; 365 int n; /* number of lines to print */ 366 int m; /* offset from left to right table entry on the same line */ 367 368 #define FSTR "%c%s %-15s%4d-%02d-%02d" 369 #define DFLT(p) ((p) == dftswitch ? '*' : ' ') 370 #define FSTRARG(p) DFLT(p), (p)->cc, (p)->nm, (p)->dt.y, (p)->dt.m, (p)->dt.d 371 372 n = sizeof(switches) / sizeof(struct djswitch); 373 m = (n + 1) / 2; 374 n /= 2; 375 for (p = switches; p != switches + n; p++) 376 printf(FSTR" "FSTR"\n", FSTRARG(p), FSTRARG(p+m)); 377 if (m != n) 378 printf(FSTR"\n", FSTRARG(p)); 379 } 380 381 /* print the date of easter sunday */ 382 void 383 printeaster(int y, int julian, int orthodox) 384 { 385 date dt; 386 struct tm tm; 387 char buf[80]; 388 static int d_first = -1; 389 390 if (d_first < 0) 391 d_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 392 /* force orthodox easter for years before 1583 */ 393 if (y < 1583) 394 orthodox = 1; 395 396 if (orthodox) 397 if (julian) 398 easteroj(y, &dt); 399 else 400 easterog(y, &dt); 401 else 402 easterg(y, &dt); 403 404 memset(&tm, 0, sizeof(tm)); 405 tm.tm_year = dt.y - 1900; 406 tm.tm_mon = dt.m - 1; 407 tm.tm_mday = dt.d; 408 strftime(buf, sizeof(buf), d_first ? "%e %B %Y" : "%B %e %Y", &tm); 409 printf("%s\n", buf); 410 } 411 412 void 413 printmonth(int y, int m, int jd_flag) 414 { 415 struct monthlines month; 416 struct weekdays wds; 417 int i; 418 419 mkmonth(y, m - 1, jd_flag, &month); 420 mkweekdays(&wds); 421 printf(" %s %d\n", month.name, y); 422 for (i = 0; i != 7; i++) 423 printf("%.2s%s\n", wds.names[i], month.lines[i]); 424 if (flag_weeks) 425 printf(" %s\n", month.weeks); 426 } 427 428 void 429 printmonthb(int y, int m, int jd_flag) 430 { 431 struct monthlines month; 432 struct weekdays wds; 433 char s[MAX_WIDTH], t[MAX_WIDTH]; 434 int i; 435 int mw; 436 437 mkmonthb(y, m - 1, jd_flag, &month); 438 mkweekdays(&wds); 439 440 mw = jd_flag ? MONTH_WIDTH_B_J : MONTH_WIDTH_B; 441 442 sprintf(s, "%s %d", month.name, y); 443 printf("%s\n", center(t, s, mw)); 444 445 if (jd_flag) 446 printf(" %s %s %s %s %s %s %.2s\n", wds.names[6], wds.names[0], 447 wds.names[1], wds.names[2], wds.names[3], 448 wds.names[4], wds.names[5]); 449 else 450 printf("%s%s%s%s%s%s%.2s\n", wds.names[6], wds.names[0], 451 wds.names[1], wds.names[2], wds.names[3], 452 wds.names[4], wds.names[5]); 453 454 for (i = 0; i != 6; i++) 455 printf("%s\n", month.lines[i]+1); 456 } 457 458 void 459 printyear(int y, int jd_flag) 460 { 461 struct monthlines year[12]; 462 struct weekdays wds; 463 char s[80], t[80]; 464 int i, j; 465 int mpl; 466 int mw; 467 468 for (i = 0; i != 12; i++) 469 mkmonth(y, i, jd_flag, year + i); 470 mkweekdays(&wds); 471 mpl = jd_flag ? 3 : 4; 472 mw = jd_flag ? MONTH_WIDTH_J : MONTH_WIDTH; 473 474 sprintf(s, "%d", y); 475 printf("%s\n", center(t, s, mpl * mw)); 476 477 for (j = 0; j != 12; j += mpl) { 478 printf(" %-*s%-*s", 479 mw, year[j].name, 480 mw, year[j + 1].name); 481 if (mpl == 3) 482 printf("%s\n", year[j + 2].name); 483 else 484 printf("%-*s%s\n", 485 mw, year[j + 2].name, 486 year[j + 3].name); 487 for (i = 0; i != 7; i++) { 488 printf("%.2s%-*s%-*s", 489 wds.names[i], 490 mw, year[j].lines[i], 491 mw, year[j + 1].lines[i]); 492 if (mpl == 3) 493 printf("%s\n", year[j + 2].lines[i]); 494 else 495 printf("%-*s%s\n", 496 mw, year[j + 2].lines[i], 497 year[j + 3].lines[i]); 498 } 499 if (flag_weeks) { 500 if (mpl == 3) 501 printf(" %-*s%-*s%-s\n", 502 mw, year[j].weeks, 503 mw, year[j + 1].weeks, 504 year[j + 2].weeks); 505 else 506 printf(" %-*s%-*s%-*s%-s\n", 507 mw, year[j].weeks, 508 mw, year[j + 1].weeks, 509 mw, year[j + 2].weeks, 510 year[j + 3].weeks); 511 } 512 } 513 } 514 515 void 516 printyearb(int y, int jd_flag) 517 { 518 struct monthlines year[12]; 519 struct weekdays wds; 520 char s[80], t[80]; 521 int i, j; 522 int mpl; 523 int mw; 524 525 for (i = 0; i != 12; i++) 526 mkmonthb(y, i, jd_flag, year + i); 527 mkweekdays(&wds); 528 mpl = jd_flag ? 2 : 3; 529 mw = jd_flag ? MONTH_WIDTH_B_J : MONTH_WIDTH_B; 530 531 sprintf(s, "%d", y); 532 printf("%s\n\n", center(t, s, mw * mpl + mpl)); 533 534 for (j = 0; j != 12; j += mpl) { 535 printf("%-*s ", mw, center(s, year[j].name, mw)); 536 if (mpl == 2) 537 printf("%s\n", center(s, year[j + 1].name, mw)); 538 else 539 printf("%-*s %s\n", mw, 540 center(s, year[j + 1].name, mw), 541 center(t, year[j + 2].name, mw)); 542 543 if (mpl == 2) 544 printf(" %s %s %s %s %s %s %s " 545 " %s %s %s %s %s %s %.2s\n", 546 wds.names[6], wds.names[0], wds.names[1], 547 wds.names[2], wds.names[3], wds.names[4], 548 wds.names[5], 549 wds.names[6], wds.names[0], wds.names[1], 550 wds.names[2], wds.names[3], wds.names[4], 551 wds.names[5]); 552 else 553 printf("%s%s%s%s%s%s%s " 554 "%s%s%s%s%s%s%s " 555 "%s%s%s%s%s%s%.2s\n", 556 wds.names[6], wds.names[0], wds.names[1], 557 wds.names[2], wds.names[3], wds.names[4], 558 wds.names[5], 559 wds.names[6], wds.names[0], wds.names[1], 560 wds.names[2], wds.names[3], wds.names[4], 561 wds.names[5], 562 wds.names[6], wds.names[0], wds.names[1], 563 wds.names[2], wds.names[3], wds.names[4], 564 wds.names[5]); 565 for (i = 0; i != 6; i++) { 566 if (mpl == 2) 567 printf("%-*s %s\n", 568 mw, year[j].lines[i]+1, 569 year[j + 1].lines[i]+1); 570 else 571 printf("%-*s %-*s %s\n", 572 mw, year[j].lines[i]+1, 573 mw, year[j + 1].lines[i]+1, 574 year[j + 2].lines[i]+1); 575 576 } 577 } 578 } 579 580 void 581 mkmonth(int y, int m, int jd_flag, struct monthlines *mlines) 582 { 583 584 struct tm tm; /* for strftime printing local names of 585 * months */ 586 date dt; /* handy date */ 587 int dw; /* width of numbers */ 588 int first; /* first day of month */ 589 int firstm; /* first day of first week of month */ 590 int i, j, k; /* just indices */ 591 int last; /* the first day of next month */ 592 int jan1 = 0; /* the first day of this year */ 593 char *ds; /* pointer to day strings (daystr or 594 * jdaystr) */ 595 596 /* Set name of month. */ 597 memset(&tm, 0, sizeof(tm)); 598 tm.tm_mon = m; 599 strftime(mlines->name, sizeof(mlines->name), "%OB", &tm); 600 mlines->name[0] = toupper((unsigned char)mlines->name[0]); 601 602 /* 603 * Set first and last to the day number of the first day of this 604 * month and the first day of next month respectively. Set jan1 to 605 * the day number of the first day of this year. 606 */ 607 first = firstday(y, m + 1); 608 if (m == 11) 609 last = firstday(y + 1, 1); 610 else 611 last = firstday(y, m + 2); 612 613 if (jd_flag) 614 jan1 = firstday(y, 1); 615 616 /* 617 * Set firstm to the day number of monday of the first week of 618 * this month. (This might be in the last month) 619 */ 620 firstm = first - weekday(first); 621 622 /* Set ds (daystring) and dw (daywidth) according to the jd_flag */ 623 if (jd_flag) { 624 ds = jdaystr; 625 dw = 4; 626 } else { 627 ds = daystr; 628 dw = 3; 629 } 630 631 /* 632 * Fill the lines with day of month or day of year (julian day) 633 * line index: i, each line is one weekday. column index: j, each 634 * column is one day number. print column index: k. 635 */ 636 for (i = 0; i != 7; i++) { 637 for (j = firstm + i, k = 0; j < last; j += 7, k += dw) 638 if (j >= first) { 639 if (jd_flag) 640 dt.d = j - jan1 + 1; 641 else 642 sdate(j, &dt); 643 memcpy(mlines->lines[i] + k, 644 ds + dt.d * dw, dw); 645 } else 646 memcpy(mlines->lines[i] + k, " ", dw); 647 mlines->lines[i][k] = '\0'; 648 649 } 650 651 /* fill the weeknumbers */ 652 if (flag_weeks) { 653 for (j = firstm, k = 0; j < last; k += dw, j += 7) 654 if (j <= nswitch) 655 memset(mlines->weeks + k, ' ', dw); 656 else 657 memcpy(mlines->weeks + k, 658 ds + week(j, &i)*dw, dw); 659 mlines->weeks[k] = '\0'; 660 } 661 } 662 663 void 664 mkmonthb(int y, int m, int jd_flag, struct monthlines *mlines) 665 { 666 667 struct tm tm; /* for strftime printing local names of 668 * months */ 669 date dt; /* handy date */ 670 int dw; /* width of numbers */ 671 int first; /* first day of month */ 672 int firsts; /* sunday of first week of month */ 673 int i, j, k; /* just indices */ 674 int jan1 = 0; /* the first day of this year */ 675 int last; /* the first day of next month */ 676 char *ds; /* pointer to day strings (daystr or 677 * jdaystr) */ 678 679 /* Set ds (daystring) and dw (daywidth) according to the jd_flag */ 680 if (jd_flag) { 681 ds = jdaystr; 682 dw = 4; 683 } else { 684 ds = daystr; 685 dw = 3; 686 } 687 688 /* Set name of month centered */ 689 memset(&tm, 0, sizeof(tm)); 690 tm.tm_mon = m; 691 strftime(mlines->name, sizeof(mlines->name), "%OB", &tm); 692 mlines->name[0] = toupper((unsigned char)mlines->name[0]); 693 694 /* 695 * Set first and last to the day number of the first day of this 696 * month and the first day of next month respectively. Set jan1 to 697 * the day number of Jan 1st of this year. 698 */ 699 dt.y = y; 700 dt.m = m + 1; 701 dt.d = 1; 702 first = sndaysb(&dt); 703 if (m == 11) { 704 dt.y = y + 1; 705 dt.m = 1; 706 dt.d = 1; 707 } else { 708 dt.y = y; 709 dt.m = m + 2; 710 dt.d = 1; 711 } 712 last = sndaysb(&dt); 713 714 if (jd_flag) { 715 dt.y = y; 716 dt.m = 1; 717 dt.d = 1; 718 jan1 = sndaysb(&dt); 719 } 720 721 /* 722 * Set firsts to the day number of sunday of the first week of 723 * this month. (This might be in the last month) 724 */ 725 firsts = first - (weekday(first)+1) % 7; 726 727 /* 728 * Fill the lines with day of month or day of year (Julian day) 729 * line index: i, each line is one week. column index: j, each 730 * column is one day number. print column index: k. 731 */ 732 for (i = 0; i != 6; i++) { 733 for (j = firsts + 7 * i, k = 0; j < last && k != dw * 7; 734 j++, k += dw) 735 if (j >= first) { 736 if (jd_flag) 737 dt.d = j - jan1 + 1; 738 else 739 sdateb(j, &dt); 740 memcpy(mlines->lines[i] + k, 741 ds + dt.d * dw, dw); 742 } else 743 memcpy(mlines->lines[i] + k, " ", dw); 744 if (k == 0) 745 mlines->lines[i][1] = '\0'; 746 else 747 mlines->lines[i][k] = '\0'; 748 } 749 } 750 751 /* Put the local names of weekdays into the wds */ 752 void 753 mkweekdays(struct weekdays *wds) 754 { 755 int i, len; 756 struct tm tm; 757 char buf[20]; 758 759 memset(&tm, 0, sizeof(tm)); 760 761 for (i = 0; i != 7; i++) { 762 tm.tm_wday = (i+1) % 7; 763 strftime(buf, sizeof(buf), "%a", &tm); 764 len = strlen(buf); 765 if (len > 2) 766 len = 2; 767 strcpy(wds->names[i], " "); 768 strncpy(wds->names[i] + 2 - len, buf, len); 769 } 770 } 771 772 /* 773 * Compute the day number of the first 774 * existing date after the first day in month. 775 * (the first day in month and even the month might not exist!) 776 */ 777 int 778 firstday(int y, int m) 779 { 780 date dt; 781 int nd; 782 783 dt.y = y; 784 dt.m = m; 785 dt.d = 1; 786 nd = sndays(&dt); 787 for (;;) { 788 sdate(nd, &dt); 789 if ((dt.m >= m && dt.y == y) || dt.y > y) 790 return (nd); 791 else 792 nd++; 793 } 794 /* NEVER REACHED */ 795 } 796 797 /* 798 * Compute the number of days from date, obey the local switch from 799 * Julian to Gregorian if specified by the user. 800 */ 801 int 802 sndays(struct date *d) 803 { 804 805 if (nswitch != 0) 806 if (nswitch < ndaysj(d)) 807 return (ndaysg(d)); 808 else 809 return (ndaysj(d)); 810 else 811 return ndaysg(d); 812 } 813 814 /* 815 * Compute the number of days from date, obey the switch from 816 * Julian to Gregorian as used by UK and her colonies. 817 */ 818 int 819 sndaysb(struct date *d) 820 { 821 822 if (nswitchb < ndaysj(d)) 823 return (ndaysg(d)); 824 else 825 return (ndaysj(d)); 826 } 827 828 /* Inverse of sndays */ 829 struct date * 830 sdate(int nd, struct date *d) 831 { 832 833 if (nswitch < nd) 834 return (gdate(nd, d)); 835 else 836 return (jdate(nd, d)); 837 } 838 839 /* Inverse of sndaysb */ 840 struct date * 841 sdateb(int nd, struct date *d) 842 { 843 844 if (nswitchb < nd) 845 return (gdate(nd, d)); 846 else 847 return (jdate(nd, d)); 848 } 849 850 /* Center string t in string s of length w by putting enough leading blanks */ 851 char * 852 center(char *s, char *t, int w) 853 { 854 char blanks[80]; 855 856 memset(blanks, ' ', sizeof(blanks)); 857 sprintf(s, "%.*s%s", (int)(w - strlen(t)) / 2, blanks, t); 858 return (s); 859 } 860 861 int 862 parsemonth(const char *s, int *m, int *y) 863 { 864 int nm, ny; 865 char *cp; 866 struct tm tm; 867 868 nm = (int)strtol(s, &cp, 10); 869 if (cp != s) { 870 ny = *y; 871 if (*cp == '\0') { 872 ; /* no special action */ 873 } else if (*cp == 'f' || *cp == 'F') { 874 if (nm <= *m) 875 ny++; 876 } else if (*cp == 'p' || *cp == 'P') { 877 if (nm >= *m) 878 ny--; 879 } else 880 return (1); 881 if (nm < 1 || nm > 12) 882 return 1; 883 *m = nm; 884 *y = ny; 885 return (0); 886 } 887 if (strptime(s, "%B", &tm) != NULL || strptime(s, "%b", &tm) != NULL) { 888 *m = tm.tm_mon + 1; 889 return (0); 890 } 891 return (1); 892 } 893