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: src/usr.bin/ncal/ncal.c,v 1.11.2.3 2002/10/23 08:10:00 roam Exp $"; 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 char *cc; /* Country code according to ISO 3166 */ 68 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); 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 *locale; /* locale to get country code */ 198 199 /* 200 * Use locale to determine the country code, 201 * and use the country code to determine the default 202 * switchdate and date format from the switches table. 203 */ 204 if ((locale = setlocale(LC_ALL, "")) == NULL) 205 warn("setlocale"); 206 locale = setlocale(LC_TIME, NULL); 207 if (locale == NULL || 208 strcmp(locale, "C") == 0 || 209 strcmp(locale, "POSIX") == 0 || 210 strcmp(locale, "ASCII") == 0 || 211 strcmp(locale, "US-ASCII") == 0) 212 locale = "_US"; 213 q = switches + sizeof(switches) / sizeof(struct djswitch); 214 for (p = switches; p != q; p++) 215 if ((cp = strstr(locale, p->cc)) != NULL && *(cp - 1) == '_') 216 break; 217 if (p == q) { 218 nswitch = ndaysj(&dftswitch->dt); 219 } else { 220 nswitch = ndaysj(&p->dt); 221 dftswitch = p; 222 } 223 224 225 /* 226 * Get the filename portion of argv[0] and set flag_backward if 227 * this program is called "cal". 228 */ 229 for (cp = argv[0]; *cp; cp++) 230 ; 231 while (cp >= argv[0] && *cp != '/') 232 cp--; 233 if (strcmp("cal", ++cp) == 0) 234 flag_backward = 1; 235 236 /* Set the switch date to United Kingdom if backwards compatible */ 237 if (flag_backward) 238 nswitchb = ndaysj(&ukswitch); 239 240 while ((ch = getopt(argc, argv, "Jejops:wy")) != -1) 241 switch (ch) { 242 case 'J': 243 if (flag_backward) 244 usage(); 245 nswitch = ndaysj(&never); 246 flag_julian_cal = 1; 247 break; 248 case 'e': 249 if (flag_backward) 250 usage(); 251 flag_easter = 1; 252 break; 253 case 'j': 254 flag_julian_day = 1; 255 break; 256 case 'o': 257 if (flag_backward) 258 usage(); 259 flag_orthodox = 1; 260 flag_easter = 1; 261 break; 262 case 'p': 263 if (flag_backward) 264 usage(); 265 printcc(); 266 return (0); 267 break; 268 case 's': 269 if (flag_backward) 270 usage(); 271 q = switches + 272 sizeof(switches) / sizeof(struct djswitch); 273 for (p = switches; 274 p != q && strcmp(p->cc, optarg) != 0; p++) 275 ; 276 if (p == q) 277 errx(EX_USAGE, 278 "%s: invalid country code", optarg); 279 nswitch = ndaysj(&(p->dt)); 280 break; 281 case 'w': 282 if (flag_backward) 283 usage(); 284 flag_weeks = 1; 285 break; 286 case 'y': 287 flag_hole_year = 1; 288 break; 289 default: 290 usage(); 291 } 292 293 argc -= optind; 294 argv += optind; 295 296 if (argc == 0) { 297 time_t t; 298 struct tm *tm; 299 300 t = time(NULL); 301 tm = localtime(&t); 302 y = tm->tm_year + 1900; 303 m = tm->tm_mon + 1; 304 } 305 306 switch (argc) { 307 case 2: 308 if (flag_easter) 309 usage(); 310 m = parsemonth(*argv++); 311 if (m < 1 || m > 12) 312 errx(EX_USAGE, 313 "%s is neither a month number (1..12) nor a name", 314 argv[-1]); 315 /* FALLTHROUGH */ 316 case 1: 317 y = atoi(*argv++); 318 if (y < 1 || y > 9999) 319 errx(EX_USAGE, "year %d not in range 1..9999", y); 320 break; 321 case 0: 322 break; 323 default: 324 usage(); 325 } 326 327 if (flag_easter) 328 printeaster(y, flag_julian_cal, flag_orthodox); 329 else if (argc == 1 || flag_hole_year) 330 if (flag_backward) 331 printyearb(y, flag_julian_day); 332 else 333 printyear(y, flag_julian_day); 334 else 335 if (flag_backward) 336 printmonthb(y, m, flag_julian_day); 337 else 338 printmonth(y, m, flag_julian_day); 339 340 return (0); 341 } 342 343 static void 344 usage(void) 345 { 346 347 fprintf(stderr, "%s\n%s\n%s\n", 348 "usage: cal [-jy] [[month] year]", 349 " ncal [-Jjpwy] [-s country_code] [[month] year]", 350 " ncal [-Jeo] [year]"); 351 exit(EX_USAGE); 352 } 353 354 /* print the assumed switches for all countries */ 355 void 356 printcc(void) 357 { 358 struct djswitch *p; 359 int n; /* number of lines to print */ 360 int m; /* offset from left to right table entry on the same line */ 361 362 #define FSTR "%c%s %-15s%4d-%02d-%02d" 363 #define DFLT(p) ((p) == dftswitch ? '*' : ' ') 364 #define FSTRARG(p) DFLT(p), (p)->cc, (p)->nm, (p)->dt.y, (p)->dt.m, (p)->dt.d 365 366 n = sizeof(switches) / sizeof(struct djswitch); 367 m = (n + 1) / 2; 368 n /= 2; 369 for (p = switches; p != switches + n; p++) 370 printf(FSTR" "FSTR"\n", FSTRARG(p), FSTRARG(p+m)); 371 if (m != n) 372 printf(FSTR"\n", FSTRARG(p)); 373 } 374 375 /* print the date of easter sunday */ 376 void 377 printeaster(int y, int julian, int orthodox) 378 { 379 date dt; 380 struct tm tm; 381 char buf[80]; 382 static int d_first = -1; 383 384 if (d_first < 0) 385 d_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 386 /* force orthodox easter for years before 1583 */ 387 if (y < 1583) 388 orthodox = 1; 389 390 if (orthodox) 391 if (julian) 392 easteroj(y, &dt); 393 else 394 easterog(y, &dt); 395 else 396 easterg(y, &dt); 397 398 memset(&tm, 0, sizeof(tm)); 399 tm.tm_year = dt.y - 1900; 400 tm.tm_mon = dt.m - 1; 401 tm.tm_mday = dt.d; 402 strftime(buf, sizeof(buf), d_first ? "%e %B %Y" : "%B %e %Y", &tm); 403 printf("%s\n", buf); 404 } 405 406 void 407 printmonth(int y, int m, int jd_flag) 408 { 409 struct monthlines month; 410 struct weekdays wds; 411 int i; 412 413 mkmonth(y, m - 1, jd_flag, &month); 414 mkweekdays(&wds); 415 printf(" %s %d\n", month.name, y); 416 for (i = 0; i != 7; i++) 417 printf("%.2s%s\n", wds.names[i], month.lines[i]); 418 if (flag_weeks) 419 printf(" %s\n", month.weeks); 420 } 421 422 void 423 printmonthb(int y, int m, int jd_flag) 424 { 425 struct monthlines month; 426 struct weekdays wds; 427 char s[MAX_WIDTH], t[MAX_WIDTH]; 428 int i; 429 int mw; 430 431 mkmonthb(y, m - 1, jd_flag, &month); 432 mkweekdays(&wds); 433 434 mw = jd_flag ? MONTH_WIDTH_B_J : MONTH_WIDTH_B; 435 436 sprintf(s, "%s %d", month.name, y); 437 printf("%s\n", center(t, s, mw)); 438 439 if (jd_flag) 440 printf(" %s %s %s %s %s %s %.2s\n", wds.names[6], wds.names[0], 441 wds.names[1], wds.names[2], wds.names[3], 442 wds.names[4], wds.names[5]); 443 else 444 printf("%s%s%s%s%s%s%.2s\n", wds.names[6], wds.names[0], 445 wds.names[1], wds.names[2], wds.names[3], 446 wds.names[4], wds.names[5]); 447 448 for (i = 0; i != 6; i++) 449 printf("%s\n", month.lines[i]+1); 450 } 451 452 void 453 printyear(int y, int jd_flag) 454 { 455 struct monthlines year[12]; 456 struct weekdays wds; 457 char s[80], t[80]; 458 int i, j; 459 int mpl; 460 int mw; 461 462 for (i = 0; i != 12; i++) 463 mkmonth(y, i, jd_flag, year + i); 464 mkweekdays(&wds); 465 mpl = jd_flag ? 3 : 4; 466 mw = jd_flag ? MONTH_WIDTH_J : MONTH_WIDTH; 467 468 sprintf(s, "%d", y); 469 printf("%s\n", center(t, s, mpl * mw)); 470 471 for (j = 0; j != 12; j += mpl) { 472 printf(" %-*s%-*s", 473 mw, year[j].name, 474 mw, year[j + 1].name); 475 if (mpl == 3) 476 printf("%s\n", year[j + 2].name); 477 else 478 printf("%-*s%s\n", 479 mw, year[j + 2].name, 480 year[j + 3].name); 481 for (i = 0; i != 7; i++) { 482 printf("%.2s%-*s%-*s", 483 wds.names[i], 484 mw, year[j].lines[i], 485 mw, year[j + 1].lines[i]); 486 if (mpl == 3) 487 printf("%s\n", year[j + 2].lines[i]); 488 else 489 printf("%-*s%s\n", 490 mw, year[j + 2].lines[i], 491 year[j + 3].lines[i]); 492 } 493 if (flag_weeks) { 494 if (mpl == 3) 495 printf(" %-*s%-*s%-s\n", 496 mw, year[j].weeks, 497 mw, year[j + 1].weeks, 498 year[j + 2].weeks); 499 else 500 printf(" %-*s%-*s%-*s%-s\n", 501 mw, year[j].weeks, 502 mw, year[j + 1].weeks, 503 mw, year[j + 2].weeks, 504 year[j + 3].weeks); 505 } 506 } 507 } 508 509 void 510 printyearb(int y, int jd_flag) 511 { 512 struct monthlines year[12]; 513 struct weekdays wds; 514 char s[80], t[80]; 515 int i, j; 516 int mpl; 517 int mw; 518 519 for (i = 0; i != 12; i++) 520 mkmonthb(y, i, jd_flag, year + i); 521 mkweekdays(&wds); 522 mpl = jd_flag ? 2 : 3; 523 mw = jd_flag ? MONTH_WIDTH_B_J : MONTH_WIDTH_B; 524 525 sprintf(s, "%d", y); 526 printf("%s\n\n", center(t, s, mw * mpl + mpl)); 527 528 for (j = 0; j != 12; j += mpl) { 529 printf("%-*s ", mw, center(s, year[j].name, mw)); 530 if (mpl == 2) 531 printf("%s\n", center(s, year[j + 1].name, mw)); 532 else 533 printf("%-*s %s\n", mw, 534 center(s, year[j + 1].name, mw), 535 center(t, year[j + 2].name, mw)); 536 537 if (mpl == 2) 538 printf(" %s %s %s %s %s %s %s " 539 " %s %s %s %s %s %s %.2s\n", 540 wds.names[6], wds.names[0], wds.names[1], 541 wds.names[2], wds.names[3], wds.names[4], 542 wds.names[5], 543 wds.names[6], wds.names[0], wds.names[1], 544 wds.names[2], wds.names[3], wds.names[4], 545 wds.names[5]); 546 else 547 printf("%s%s%s%s%s%s%s " 548 "%s%s%s%s%s%s%s " 549 "%s%s%s%s%s%s%.2s\n", 550 wds.names[6], wds.names[0], wds.names[1], 551 wds.names[2], wds.names[3], wds.names[4], 552 wds.names[5], 553 wds.names[6], wds.names[0], wds.names[1], 554 wds.names[2], wds.names[3], wds.names[4], 555 wds.names[5], 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 for (i = 0; i != 6; i++) { 560 if (mpl == 2) 561 printf("%-*s %s\n", 562 mw, year[j].lines[i]+1, 563 year[j + 1].lines[i]+1); 564 else 565 printf("%-*s %-*s %s\n", 566 mw, year[j].lines[i]+1, 567 mw, year[j + 1].lines[i]+1, 568 year[j + 2].lines[i]+1); 569 570 } 571 } 572 } 573 574 void 575 mkmonth(int y, int m, int jd_flag, struct monthlines *mlines) 576 { 577 578 struct tm tm; /* for strftime printing local names of 579 * months */ 580 date dt; /* handy date */ 581 int dw; /* width of numbers */ 582 int first; /* first day of month */ 583 int firstm; /* first day of first week of month */ 584 int i, j, k; /* just indices */ 585 int last; /* the first day of next month */ 586 int jan1 = 0; /* the first day of this year */ 587 char *ds; /* pointer to day strings (daystr or 588 * jdaystr) */ 589 590 /* Set name of month. */ 591 memset(&tm, 0, sizeof(tm)); 592 tm.tm_mon = m; 593 strftime(mlines->name, sizeof(mlines->name), "%OB", &tm); 594 mlines->name[0] = toupper((unsigned char)mlines->name[0]); 595 596 /* 597 * Set first and last to the day number of the first day of this 598 * month and the first day of next month respectively. Set jan1 to 599 * the day number of the first day of this year. 600 */ 601 first = firstday(y, m + 1); 602 if (m == 11) 603 last = firstday(y + 1, 1); 604 else 605 last = firstday(y, m + 2); 606 607 if (jd_flag) 608 jan1 = firstday(y, 1); 609 610 /* 611 * Set firstm to the day number of monday of the first week of 612 * this month. (This might be in the last month) 613 */ 614 firstm = first - weekday(first); 615 616 /* Set ds (daystring) and dw (daywidth) according to the jd_flag */ 617 if (jd_flag) { 618 ds = jdaystr; 619 dw = 4; 620 } else { 621 ds = daystr; 622 dw = 3; 623 } 624 625 /* 626 * Fill the lines with day of month or day of year (julian day) 627 * line index: i, each line is one weekday. column index: j, each 628 * column is one day number. print column index: k. 629 */ 630 for (i = 0; i != 7; i++) { 631 for (j = firstm + i, k = 0; j < last; j += 7, k += dw) 632 if (j >= first) { 633 if (jd_flag) 634 dt.d = j - jan1 + 1; 635 else 636 sdate(j, &dt); 637 memcpy(mlines->lines[i] + k, 638 ds + dt.d * dw, dw); 639 } else 640 memcpy(mlines->lines[i] + k, " ", dw); 641 mlines->lines[i][k] = '\0'; 642 643 } 644 645 /* fill the weeknumbers */ 646 if (flag_weeks) { 647 for (j = firstm, k = 0; j < last; k += dw, j += 7) 648 if (j <= nswitch) 649 memset(mlines->weeks + k, ' ', dw); 650 else 651 memcpy(mlines->weeks + k, 652 ds + week(j, &i)*dw, dw); 653 mlines->weeks[k] = '\0'; 654 } 655 } 656 657 void 658 mkmonthb(int y, int m, int jd_flag, struct monthlines *mlines) 659 { 660 661 struct tm tm; /* for strftime printing local names of 662 * months */ 663 date dt; /* handy date */ 664 int dw; /* width of numbers */ 665 int first; /* first day of month */ 666 int firsts; /* sunday of first week of month */ 667 int i, j, k; /* just indices */ 668 int jan1 = 0; /* the first day of this year */ 669 int last; /* the first day of next month */ 670 char *ds; /* pointer to day strings (daystr or 671 * jdaystr) */ 672 673 /* Set ds (daystring) and dw (daywidth) according to the jd_flag */ 674 if (jd_flag) { 675 ds = jdaystr; 676 dw = 4; 677 } else { 678 ds = daystr; 679 dw = 3; 680 } 681 682 /* Set name of month centered */ 683 memset(&tm, 0, sizeof(tm)); 684 tm.tm_mon = m; 685 strftime(mlines->name, sizeof(mlines->name), "%OB", &tm); 686 mlines->name[0] = toupper((unsigned char)mlines->name[0]); 687 688 /* 689 * Set first and last to the day number of the first day of this 690 * month and the first day of next month respectively. Set jan1 to 691 * the day number of Jan 1st of this year. 692 */ 693 dt.y = y; 694 dt.m = m + 1; 695 dt.d = 1; 696 first = sndaysb(&dt); 697 if (m == 11) { 698 dt.y = y + 1; 699 dt.m = 1; 700 dt.d = 1; 701 } else { 702 dt.y = y; 703 dt.m = m + 2; 704 dt.d = 1; 705 } 706 last = sndaysb(&dt); 707 708 if (jd_flag) { 709 dt.y = y; 710 dt.m = 1; 711 dt.d = 1; 712 jan1 = sndaysb(&dt); 713 } 714 715 /* 716 * Set firsts to the day number of sunday of the first week of 717 * this month. (This might be in the last month) 718 */ 719 firsts = first - (weekday(first)+1) % 7; 720 721 /* 722 * Fill the lines with day of month or day of year (Julian day) 723 * line index: i, each line is one week. column index: j, each 724 * column is one day number. print column index: k. 725 */ 726 for (i = 0; i != 6; i++) { 727 for (j = firsts + 7 * i, k = 0; j < last && k != dw * 7; 728 j++, k += dw) 729 if (j >= first) { 730 if (jd_flag) 731 dt.d = j - jan1 + 1; 732 else 733 sdateb(j, &dt); 734 memcpy(mlines->lines[i] + k, 735 ds + dt.d * dw, dw); 736 } else 737 memcpy(mlines->lines[i] + k, " ", dw); 738 if (k == 0) 739 mlines->lines[i][1] = '\0'; 740 else 741 mlines->lines[i][k] = '\0'; 742 } 743 } 744 745 /* Put the local names of weekdays into the wds */ 746 void 747 mkweekdays(struct weekdays *wds) 748 { 749 int i, len; 750 struct tm tm; 751 char buf[20]; 752 753 memset(&tm, 0, sizeof(tm)); 754 755 for (i = 0; i != 7; i++) { 756 tm.tm_wday = (i+1) % 7; 757 strftime(buf, sizeof(buf), "%a", &tm); 758 len = strlen(buf); 759 if (len > 2) 760 len = 2; 761 strcpy(wds->names[i], " "); 762 strncpy(wds->names[i] + 2 - len, buf, len); 763 } 764 } 765 766 /* 767 * Compute the day number of the first 768 * existing date after the first day in month. 769 * (the first day in month and even the month might not exist!) 770 */ 771 int 772 firstday(int y, int m) 773 { 774 date dt; 775 int nd; 776 777 dt.y = y; 778 dt.m = m; 779 dt.d = 1; 780 nd = sndays(&dt); 781 for (;;) { 782 sdate(nd, &dt); 783 if ((dt.m >= m && dt.y == y) || dt.y > y) 784 return (nd); 785 else 786 nd++; 787 } 788 /* NEVER REACHED */ 789 } 790 791 /* 792 * Compute the number of days from date, obey the local switch from 793 * Julian to Gregorian if specified by the user. 794 */ 795 int 796 sndays(struct date *d) 797 { 798 799 if (nswitch != 0) 800 if (nswitch < ndaysj(d)) 801 return (ndaysg(d)); 802 else 803 return (ndaysj(d)); 804 else 805 return ndaysg(d); 806 } 807 808 /* 809 * Compute the number of days from date, obey the switch from 810 * Julian to Gregorian as used by UK and her colonies. 811 */ 812 int 813 sndaysb(struct date *d) 814 { 815 816 if (nswitchb < ndaysj(d)) 817 return (ndaysg(d)); 818 else 819 return (ndaysj(d)); 820 } 821 822 /* Inverse of sndays */ 823 struct date * 824 sdate(int nd, struct date *d) 825 { 826 827 if (nswitch < nd) 828 return (gdate(nd, d)); 829 else 830 return (jdate(nd, d)); 831 } 832 833 /* Inverse of sndaysb */ 834 struct date * 835 sdateb(int nd, struct date *d) 836 { 837 838 if (nswitchb < nd) 839 return (gdate(nd, d)); 840 else 841 return (jdate(nd, d)); 842 } 843 844 /* Center string t in string s of length w by putting enough leading blanks */ 845 char * 846 center(char *s, char *t, int w) 847 { 848 char blanks[80]; 849 850 memset(blanks, ' ', sizeof(blanks)); 851 sprintf(s, "%.*s%s", (int)(w - strlen(t)) / 2, blanks, t); 852 return (s); 853 } 854 855 int 856 parsemonth(const char *s) 857 { 858 int v; 859 char *cp; 860 struct tm tm; 861 862 v = (int)strtol(s, &cp, 10); 863 if (cp != s) 864 return (v); 865 if (strptime(s, "%B", &tm) != NULL) 866 return (tm.tm_mon + 1); 867 if (strptime(s, "%b", &tm) != NULL) 868 return (tm.tm_mon + 1); 869 return (0); 870 } 871