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 * $FreeBSD: src/usr.bin/ncal/ncal.c,v 1.11.2.3 2002/10/23 08:10:00 roam Exp $ 27 * $DragonFly: src/usr.bin/ncal/ncal.c,v 1.2 2003/06/17 04:29:29 dillon Exp $ 28 */ 29 30 #include <calendar.h> 31 #include <ctype.h> 32 #include <err.h> 33 #include <langinfo.h> 34 #include <locale.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <sysexits.h> 39 #include <time.h> 40 #include <unistd.h> 41 42 /* Width of one month with backward compatibility */ 43 #define MONTH_WIDTH_B_J 27 44 #define MONTH_WIDTH_B 20 45 46 #define MONTH_WIDTH_J 24 47 #define MONTH_WIDTH 18 48 49 #define MAX_WIDTH 28 50 51 typedef struct date date; 52 53 struct monthlines { 54 char name[MAX_WIDTH + 1]; 55 char lines[7][MAX_WIDTH + 1]; 56 char weeks[MAX_WIDTH + 1]; 57 }; 58 59 struct weekdays { 60 char names[7][4]; 61 }; 62 63 /* The switches from Julian to Gregorian in some countries */ 64 static struct djswitch { 65 char *cc; /* Country code according to ISO 3166 */ 66 char *nm; /* Name of country */ 67 date dt; /* Last day of Julian calendar */ 68 } switches[] = { 69 {"AL", "Albania", {1912, 11, 30}}, 70 {"AT", "Austria", {1583, 10, 5}}, 71 {"AU", "Australia", {1752, 9, 2}}, 72 {"BE", "Belgium", {1582, 12, 14}}, 73 {"BG", "Bulgaria", {1916, 3, 18}}, 74 {"CA", "Canada", {1752, 9, 2}}, 75 {"CH", "Switzerland", {1655, 2, 28}}, 76 {"CN", "China", {1911, 12, 18}}, 77 {"CZ", "Czech Republic",{1584, 1, 6}}, 78 {"DE", "Germany", {1700, 2, 18}}, 79 {"DK", "Denmark", {1700, 2, 18}}, 80 {"ES", "Spain", {1582, 10, 4}}, 81 {"FI", "Finland", {1753, 2, 17}}, 82 {"FR", "France", {1582, 12, 9}}, 83 {"GB", "United Kingdom",{1752, 9, 2}}, 84 {"GR", "Greece", {1924, 3, 9}}, 85 {"HU", "Hungary", {1587, 10, 21}}, 86 {"IS", "Iceland", {1700, 11, 16}}, 87 {"IT", "Italy", {1582, 10, 4}}, 88 {"JP", "Japan", {1918, 12, 18}}, 89 {"LI", "Lithuania", {1918, 2, 1}}, 90 {"LN", "Latin", {9999, 05, 31}}, 91 {"LU", "Luxembourg", {1582, 12, 14}}, 92 {"LV", "Latvia", {1918, 2, 1}}, 93 {"NL", "Netherlands", {1582, 12, 14}}, 94 {"NO", "Norway", {1700, 2, 18}}, 95 {"PL", "Poland", {1582, 10, 4}}, 96 {"PT", "Portugal", {1582, 10, 4}}, 97 {"RO", "Romania", {1919, 3, 31}}, 98 {"RU", "Russia", {1918, 1, 31}}, 99 {"SI", "Slovenia", {1919, 3, 4}}, 100 {"SW", "Sweden", {1753, 2, 17}}, 101 {"TR", "Turkey", {1926, 12, 18}}, 102 {"US", "United States", {1752, 9, 2}}, 103 {"YU", "Yugoslavia", {1919, 3, 4}} 104 }; 105 106 struct djswitch *dftswitch = 107 switches + sizeof(switches) / sizeof(struct djswitch) - 2; 108 /* default switch (should be "US") */ 109 110 /* Table used to print day of month and week numbers */ 111 char daystr[] = " 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15" 112 " 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31" 113 " 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47" 114 " 48 49 50 51 52 53"; 115 116 /* Table used to print day of year and week numbers */ 117 char jdaystr[] = " 1 2 3 4 5 6 7 8 9" 118 " 10 11 12 13 14 15 16 17 18 19" 119 " 20 21 22 23 24 25 26 27 28 29" 120 " 30 31 32 33 34 35 36 37 38 39" 121 " 40 41 42 43 44 45 46 47 48 49" 122 " 50 51 52 53 54 55 56 57 58 59" 123 " 60 61 62 63 64 65 66 67 68 69" 124 " 70 71 72 73 74 75 76 77 78 79" 125 " 80 81 82 83 84 85 86 87 88 89" 126 " 90 91 92 93 94 95 96 97 98 99" 127 " 100 101 102 103 104 105 106 107 108 109" 128 " 110 111 112 113 114 115 116 117 118 119" 129 " 120 121 122 123 124 125 126 127 128 129" 130 " 130 131 132 133 134 135 136 137 138 139" 131 " 140 141 142 143 144 145 146 147 148 149" 132 " 150 151 152 153 154 155 156 157 158 159" 133 " 160 161 162 163 164 165 166 167 168 169" 134 " 170 171 172 173 174 175 176 177 178 179" 135 " 180 181 182 183 184 185 186 187 188 189" 136 " 190 191 192 193 194 195 196 197 198 199" 137 " 200 201 202 203 204 205 206 207 208 209" 138 " 210 211 212 213 214 215 216 217 218 219" 139 " 220 221 222 223 224 225 226 227 228 229" 140 " 230 231 232 233 234 235 236 237 238 239" 141 " 240 241 242 243 244 245 246 247 248 249" 142 " 250 251 252 253 254 255 256 257 258 259" 143 " 260 261 262 263 264 265 266 267 268 269" 144 " 270 271 272 273 274 275 276 277 278 279" 145 " 280 281 282 283 284 285 286 287 288 289" 146 " 290 291 292 293 294 295 296 297 298 299" 147 " 300 301 302 303 304 305 306 307 308 309" 148 " 310 311 312 313 314 315 316 317 318 319" 149 " 320 321 322 323 324 325 326 327 328 329" 150 " 330 331 332 333 334 335 336 337 338 339" 151 " 340 341 342 343 344 345 346 347 348 349" 152 " 350 351 352 353 354 355 356 357 358 359" 153 " 360 361 362 363 364 365 366"; 154 155 int flag_weeks; /* user wants number of week */ 156 int nswitch; /* user defined switch date */ 157 int nswitchb; /* switch date for backward compatibility */ 158 159 char *center(char *s, char *t, int w); 160 void mkmonth(int year, int month, int jd_flag, struct monthlines * monthl); 161 void mkmonthb(int year, int month, int jd_flag, struct monthlines * monthl); 162 void mkweekdays(struct weekdays * wds); 163 int parsemonth(const char *s); 164 void printcc(void); 165 void printeaster(int year, int julian, int orthodox); 166 void printmonth(int year, int month, int jd_flag); 167 void printmonthb(int year, int month, int jd_flag); 168 void printyear(int year, int jd_flag); 169 void printyearb(int year, int jd_flag); 170 int firstday(int y, int m); 171 date *sdate(int ndays, struct date * d); 172 date *sdateb(int ndays, struct date * d); 173 int sndays(struct date * d); 174 int sndaysb(struct date * d); 175 static void usage(void); 176 int weekdayb(int nd); 177 178 int 179 main(int argc, char *argv[]) 180 { 181 struct djswitch *p, *q; /* to search user defined switch date */ 182 date never = {10000, 1, 1}; /* outside valid range of dates */ 183 date ukswitch = {1752, 9, 2};/* switch date for Great Britain */ 184 int ch; /* holds the option character */ 185 int m = 0; /* month */ 186 int y = 0; /* year */ 187 int flag_backward = 0; /* user called cal--backward compat. */ 188 int flag_hole_year = 0; /* user wants the whole year */ 189 int flag_julian_cal = 0; /* user wants Julian Calendar */ 190 int flag_julian_day = 0; /* user wants the Julian day 191 * numbers */ 192 int flag_orthodox = 0; /* use wants Orthodox easter */ 193 int flag_easter = 0; /* use wants easter date */ 194 char *cp; /* character pointer */ 195 char *locale; /* locale to get country code */ 196 197 /* 198 * Use locale to determine the country code, 199 * and use the country code to determine the default 200 * switchdate and date format from the switches table. 201 */ 202 if ((locale = setlocale(LC_ALL, "")) == NULL) 203 warn("setlocale"); 204 locale = setlocale(LC_TIME, NULL); 205 if (locale == NULL || 206 strcmp(locale, "C") == 0 || 207 strcmp(locale, "POSIX") == 0 || 208 strcmp(locale, "ASCII") == 0 || 209 strcmp(locale, "US-ASCII") == 0) 210 locale = "_US"; 211 q = switches + sizeof(switches) / sizeof(struct djswitch); 212 for (p = switches; p != q; p++) 213 if ((cp = strstr(locale, p->cc)) != NULL && *(cp - 1) == '_') 214 break; 215 if (p == q) { 216 nswitch = ndaysj(&dftswitch->dt); 217 } else { 218 nswitch = ndaysj(&p->dt); 219 dftswitch = p; 220 } 221 222 223 /* 224 * Get the filename portion of argv[0] and set flag_backward if 225 * this program is called "cal". 226 */ 227 for (cp = argv[0]; *cp; cp++) 228 ; 229 while (cp >= argv[0] && *cp != '/') 230 cp--; 231 if (strcmp("cal", ++cp) == 0) 232 flag_backward = 1; 233 234 /* Set the switch date to United Kingdom if backwards compatible */ 235 if (flag_backward) 236 nswitchb = ndaysj(&ukswitch); 237 238 while ((ch = getopt(argc, argv, "Jejops:wy")) != -1) 239 switch (ch) { 240 case 'J': 241 if (flag_backward) 242 usage(); 243 nswitch = ndaysj(&never); 244 flag_julian_cal = 1; 245 break; 246 case 'e': 247 if (flag_backward) 248 usage(); 249 flag_easter = 1; 250 break; 251 case 'j': 252 flag_julian_day = 1; 253 break; 254 case 'o': 255 if (flag_backward) 256 usage(); 257 flag_orthodox = 1; 258 flag_easter = 1; 259 break; 260 case 'p': 261 if (flag_backward) 262 usage(); 263 printcc(); 264 return (0); 265 break; 266 case 's': 267 if (flag_backward) 268 usage(); 269 q = switches + 270 sizeof(switches) / sizeof(struct djswitch); 271 for (p = switches; 272 p != q && strcmp(p->cc, optarg) != 0; p++) 273 ; 274 if (p == q) 275 errx(EX_USAGE, 276 "%s: invalid country code", optarg); 277 nswitch = ndaysj(&(p->dt)); 278 break; 279 case 'w': 280 if (flag_backward) 281 usage(); 282 flag_weeks = 1; 283 break; 284 case 'y': 285 flag_hole_year = 1; 286 break; 287 default: 288 usage(); 289 } 290 291 argc -= optind; 292 argv += optind; 293 294 if (argc == 0) { 295 time_t t; 296 struct tm *tm; 297 298 t = time(NULL); 299 tm = localtime(&t); 300 y = tm->tm_year + 1900; 301 m = tm->tm_mon + 1; 302 } 303 304 switch (argc) { 305 case 2: 306 if (flag_easter) 307 usage(); 308 m = parsemonth(*argv++); 309 if (m < 1 || m > 12) 310 errx(EX_USAGE, 311 "%s is neither a month number (1..12) nor a name", 312 argv[-1]); 313 /* FALLTHROUGH */ 314 case 1: 315 y = atoi(*argv++); 316 if (y < 1 || y > 9999) 317 errx(EX_USAGE, "year %d not in range 1..9999", y); 318 break; 319 case 0: 320 break; 321 default: 322 usage(); 323 } 324 325 if (flag_easter) 326 printeaster(y, flag_julian_cal, flag_orthodox); 327 else if (argc == 1 || flag_hole_year) 328 if (flag_backward) 329 printyearb(y, flag_julian_day); 330 else 331 printyear(y, flag_julian_day); 332 else 333 if (flag_backward) 334 printmonthb(y, m, flag_julian_day); 335 else 336 printmonth(y, m, flag_julian_day); 337 338 return (0); 339 } 340 341 static void 342 usage(void) 343 { 344 345 fprintf(stderr, "%s\n%s\n%s\n", 346 "usage: cal [-jy] [[month] year]", 347 " ncal [-Jjpwy] [-s country_code] [[month] year]", 348 " ncal [-Jeo] [year]"); 349 exit(EX_USAGE); 350 } 351 352 /* print the assumed switches for all countries */ 353 void 354 printcc(void) 355 { 356 struct djswitch *p; 357 int n; /* number of lines to print */ 358 int m; /* offset from left to right table entry on the same line */ 359 360 #define FSTR "%c%s %-15s%4d-%02d-%02d" 361 #define DFLT(p) ((p) == dftswitch ? '*' : ' ') 362 #define FSTRARG(p) DFLT(p), (p)->cc, (p)->nm, (p)->dt.y, (p)->dt.m, (p)->dt.d 363 364 n = sizeof(switches) / sizeof(struct djswitch); 365 m = (n + 1) / 2; 366 n /= 2; 367 for (p = switches; p != switches + n; p++) 368 printf(FSTR" "FSTR"\n", FSTRARG(p), FSTRARG(p+m)); 369 if (m != n) 370 printf(FSTR"\n", FSTRARG(p)); 371 } 372 373 /* print the date of easter sunday */ 374 void 375 printeaster(int y, int julian, int orthodox) 376 { 377 date dt; 378 struct tm tm; 379 char buf[80]; 380 static int d_first = -1; 381 382 if (d_first < 0) 383 d_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 384 /* force orthodox easter for years before 1583 */ 385 if (y < 1583) 386 orthodox = 1; 387 388 if (orthodox) 389 if (julian) 390 easteroj(y, &dt); 391 else 392 easterog(y, &dt); 393 else 394 easterg(y, &dt); 395 396 memset(&tm, 0, sizeof(tm)); 397 tm.tm_year = dt.y - 1900; 398 tm.tm_mon = dt.m - 1; 399 tm.tm_mday = dt.d; 400 strftime(buf, sizeof(buf), d_first ? "%e %B %Y" : "%B %e %Y", &tm); 401 printf("%s\n", buf); 402 } 403 404 void 405 printmonth(int y, int m, int jd_flag) 406 { 407 struct monthlines month; 408 struct weekdays wds; 409 int i; 410 411 mkmonth(y, m - 1, jd_flag, &month); 412 mkweekdays(&wds); 413 printf(" %s %d\n", month.name, y); 414 for (i = 0; i != 7; i++) 415 printf("%.2s%s\n", wds.names[i], month.lines[i]); 416 if (flag_weeks) 417 printf(" %s\n", month.weeks); 418 } 419 420 void 421 printmonthb(int y, int m, int jd_flag) 422 { 423 struct monthlines month; 424 struct weekdays wds; 425 char s[MAX_WIDTH], t[MAX_WIDTH]; 426 int i; 427 int mw; 428 429 mkmonthb(y, m - 1, jd_flag, &month); 430 mkweekdays(&wds); 431 432 mw = jd_flag ? MONTH_WIDTH_B_J : MONTH_WIDTH_B; 433 434 sprintf(s, "%s %d", month.name, y); 435 printf("%s\n", center(t, s, mw)); 436 437 if (jd_flag) 438 printf(" %s %s %s %s %s %s %.2s\n", wds.names[6], wds.names[0], 439 wds.names[1], wds.names[2], wds.names[3], 440 wds.names[4], wds.names[5]); 441 else 442 printf("%s%s%s%s%s%s%.2s\n", wds.names[6], wds.names[0], 443 wds.names[1], wds.names[2], wds.names[3], 444 wds.names[4], wds.names[5]); 445 446 for (i = 0; i != 6; i++) 447 printf("%s\n", month.lines[i]+1); 448 } 449 450 void 451 printyear(int y, int jd_flag) 452 { 453 struct monthlines year[12]; 454 struct weekdays wds; 455 char s[80], t[80]; 456 int i, j; 457 int mpl; 458 int mw; 459 460 for (i = 0; i != 12; i++) 461 mkmonth(y, i, jd_flag, year + i); 462 mkweekdays(&wds); 463 mpl = jd_flag ? 3 : 4; 464 mw = jd_flag ? MONTH_WIDTH_J : MONTH_WIDTH; 465 466 sprintf(s, "%d", y); 467 printf("%s\n", center(t, s, mpl * mw)); 468 469 for (j = 0; j != 12; j += mpl) { 470 printf(" %-*s%-*s", 471 mw, year[j].name, 472 mw, year[j + 1].name); 473 if (mpl == 3) 474 printf("%s\n", year[j + 2].name); 475 else 476 printf("%-*s%s\n", 477 mw, year[j + 2].name, 478 year[j + 3].name); 479 for (i = 0; i != 7; i++) { 480 printf("%.2s%-*s%-*s", 481 wds.names[i], 482 mw, year[j].lines[i], 483 mw, year[j + 1].lines[i]); 484 if (mpl == 3) 485 printf("%s\n", year[j + 2].lines[i]); 486 else 487 printf("%-*s%s\n", 488 mw, year[j + 2].lines[i], 489 year[j + 3].lines[i]); 490 } 491 if (flag_weeks) { 492 if (mpl == 3) 493 printf(" %-*s%-*s%-s\n", 494 mw, year[j].weeks, 495 mw, year[j + 1].weeks, 496 year[j + 2].weeks); 497 else 498 printf(" %-*s%-*s%-*s%-s\n", 499 mw, year[j].weeks, 500 mw, year[j + 1].weeks, 501 mw, year[j + 2].weeks, 502 year[j + 3].weeks); 503 } 504 } 505 } 506 507 void 508 printyearb(int y, int jd_flag) 509 { 510 struct monthlines year[12]; 511 struct weekdays wds; 512 char s[80], t[80]; 513 int i, j; 514 int mpl; 515 int mw; 516 517 for (i = 0; i != 12; i++) 518 mkmonthb(y, i, jd_flag, year + i); 519 mkweekdays(&wds); 520 mpl = jd_flag ? 2 : 3; 521 mw = jd_flag ? MONTH_WIDTH_B_J : MONTH_WIDTH_B; 522 523 sprintf(s, "%d", y); 524 printf("%s\n\n", center(t, s, mw * mpl + mpl)); 525 526 for (j = 0; j != 12; j += mpl) { 527 printf("%-*s ", mw, center(s, year[j].name, mw)); 528 if (mpl == 2) 529 printf("%s\n", center(s, year[j + 1].name, mw)); 530 else 531 printf("%-*s %s\n", mw, 532 center(s, year[j + 1].name, mw), 533 center(t, year[j + 2].name, mw)); 534 535 if (mpl == 2) 536 printf(" %s %s %s %s %s %s %s " 537 " %s %s %s %s %s %s %.2s\n", 538 wds.names[6], wds.names[0], wds.names[1], 539 wds.names[2], wds.names[3], wds.names[4], 540 wds.names[5], 541 wds.names[6], wds.names[0], wds.names[1], 542 wds.names[2], wds.names[3], wds.names[4], 543 wds.names[5]); 544 else 545 printf("%s%s%s%s%s%s%s " 546 "%s%s%s%s%s%s%s " 547 "%s%s%s%s%s%s%.2s\n", 548 wds.names[6], wds.names[0], wds.names[1], 549 wds.names[2], wds.names[3], wds.names[4], 550 wds.names[5], 551 wds.names[6], wds.names[0], wds.names[1], 552 wds.names[2], wds.names[3], wds.names[4], 553 wds.names[5], 554 wds.names[6], wds.names[0], wds.names[1], 555 wds.names[2], wds.names[3], wds.names[4], 556 wds.names[5]); 557 for (i = 0; i != 6; i++) { 558 if (mpl == 2) 559 printf("%-*s %s\n", 560 mw, year[j].lines[i]+1, 561 year[j + 1].lines[i]+1); 562 else 563 printf("%-*s %-*s %s\n", 564 mw, year[j].lines[i]+1, 565 mw, year[j + 1].lines[i]+1, 566 year[j + 2].lines[i]+1); 567 568 } 569 } 570 } 571 572 void 573 mkmonth(int y, int m, int jd_flag, struct monthlines *mlines) 574 { 575 576 struct tm tm; /* for strftime printing local names of 577 * months */ 578 date dt; /* handy date */ 579 int dw; /* width of numbers */ 580 int first; /* first day of month */ 581 int firstm; /* first day of first week of month */ 582 int i, j, k; /* just indices */ 583 int last; /* the first day of next month */ 584 int jan1 = 0; /* the first day of this year */ 585 char *ds; /* pointer to day strings (daystr or 586 * jdaystr) */ 587 588 /* Set name of month. */ 589 memset(&tm, 0, sizeof(tm)); 590 tm.tm_mon = m; 591 strftime(mlines->name, sizeof(mlines->name), "%OB", &tm); 592 mlines->name[0] = toupper((unsigned char)mlines->name[0]); 593 594 /* 595 * Set first and last to the day number of the first day of this 596 * month and the first day of next month respectively. Set jan1 to 597 * the day number of the first day of this year. 598 */ 599 first = firstday(y, m + 1); 600 if (m == 11) 601 last = firstday(y + 1, 1); 602 else 603 last = firstday(y, m + 2); 604 605 if (jd_flag) 606 jan1 = firstday(y, 1); 607 608 /* 609 * Set firstm to the day number of monday of the first week of 610 * this month. (This might be in the last month) 611 */ 612 firstm = first - weekday(first); 613 614 /* Set ds (daystring) and dw (daywidth) according to the jd_flag */ 615 if (jd_flag) { 616 ds = jdaystr; 617 dw = 4; 618 } else { 619 ds = daystr; 620 dw = 3; 621 } 622 623 /* 624 * Fill the lines with day of month or day of year (julian day) 625 * line index: i, each line is one weekday. column index: j, each 626 * column is one day number. print column index: k. 627 */ 628 for (i = 0; i != 7; i++) { 629 for (j = firstm + i, k = 0; j < last; j += 7, k += dw) 630 if (j >= first) { 631 if (jd_flag) 632 dt.d = j - jan1 + 1; 633 else 634 sdate(j, &dt); 635 memcpy(mlines->lines[i] + k, 636 ds + dt.d * dw, dw); 637 } else 638 memcpy(mlines->lines[i] + k, " ", dw); 639 mlines->lines[i][k] = '\0'; 640 641 } 642 643 /* fill the weeknumbers */ 644 if (flag_weeks) { 645 for (j = firstm, k = 0; j < last; k += dw, j += 7) 646 if (j <= nswitch) 647 memset(mlines->weeks + k, ' ', dw); 648 else 649 memcpy(mlines->weeks + k, 650 ds + week(j, &i)*dw, dw); 651 mlines->weeks[k] = '\0'; 652 } 653 } 654 655 void 656 mkmonthb(int y, int m, int jd_flag, struct monthlines *mlines) 657 { 658 659 struct tm tm; /* for strftime printing local names of 660 * months */ 661 date dt; /* handy date */ 662 int dw; /* width of numbers */ 663 int first; /* first day of month */ 664 int firsts; /* sunday of first week of month */ 665 int i, j, k; /* just indices */ 666 int jan1 = 0; /* the first day of this year */ 667 int last; /* the first day of next month */ 668 char *ds; /* pointer to day strings (daystr or 669 * jdaystr) */ 670 671 /* Set ds (daystring) and dw (daywidth) according to the jd_flag */ 672 if (jd_flag) { 673 ds = jdaystr; 674 dw = 4; 675 } else { 676 ds = daystr; 677 dw = 3; 678 } 679 680 /* Set name of month centered */ 681 memset(&tm, 0, sizeof(tm)); 682 tm.tm_mon = m; 683 strftime(mlines->name, sizeof(mlines->name), "%OB", &tm); 684 mlines->name[0] = toupper((unsigned char)mlines->name[0]); 685 686 /* 687 * Set first and last to the day number of the first day of this 688 * month and the first day of next month respectively. Set jan1 to 689 * the day number of Jan 1st of this year. 690 */ 691 dt.y = y; 692 dt.m = m + 1; 693 dt.d = 1; 694 first = sndaysb(&dt); 695 if (m == 11) { 696 dt.y = y + 1; 697 dt.m = 1; 698 dt.d = 1; 699 } else { 700 dt.y = y; 701 dt.m = m + 2; 702 dt.d = 1; 703 } 704 last = sndaysb(&dt); 705 706 if (jd_flag) { 707 dt.y = y; 708 dt.m = 1; 709 dt.d = 1; 710 jan1 = sndaysb(&dt); 711 } 712 713 /* 714 * Set firsts to the day number of sunday of the first week of 715 * this month. (This might be in the last month) 716 */ 717 firsts = first - (weekday(first)+1) % 7; 718 719 /* 720 * Fill the lines with day of month or day of year (Julian day) 721 * line index: i, each line is one week. column index: j, each 722 * column is one day number. print column index: k. 723 */ 724 for (i = 0; i != 6; i++) { 725 for (j = firsts + 7 * i, k = 0; j < last && k != dw * 7; 726 j++, k += dw) 727 if (j >= first) { 728 if (jd_flag) 729 dt.d = j - jan1 + 1; 730 else 731 sdateb(j, &dt); 732 memcpy(mlines->lines[i] + k, 733 ds + dt.d * dw, dw); 734 } else 735 memcpy(mlines->lines[i] + k, " ", dw); 736 if (k == 0) 737 mlines->lines[i][1] = '\0'; 738 else 739 mlines->lines[i][k] = '\0'; 740 } 741 } 742 743 /* Put the local names of weekdays into the wds */ 744 void 745 mkweekdays(struct weekdays *wds) 746 { 747 int i, len; 748 struct tm tm; 749 char buf[20]; 750 751 memset(&tm, 0, sizeof(tm)); 752 753 for (i = 0; i != 7; i++) { 754 tm.tm_wday = (i+1) % 7; 755 strftime(buf, sizeof(buf), "%a", &tm); 756 len = strlen(buf); 757 if (len > 2) 758 len = 2; 759 strcpy(wds->names[i], " "); 760 strncpy(wds->names[i] + 2 - len, buf, len); 761 } 762 } 763 764 /* 765 * Compute the day number of the first 766 * existing date after the first day in month. 767 * (the first day in month and even the month might not exist!) 768 */ 769 int 770 firstday(int y, int m) 771 { 772 date dt; 773 int nd; 774 775 dt.y = y; 776 dt.m = m; 777 dt.d = 1; 778 nd = sndays(&dt); 779 for (;;) { 780 sdate(nd, &dt); 781 if ((dt.m >= m && dt.y == y) || dt.y > y) 782 return (nd); 783 else 784 nd++; 785 } 786 /* NEVER REACHED */ 787 } 788 789 /* 790 * Compute the number of days from date, obey the local switch from 791 * Julian to Gregorian if specified by the user. 792 */ 793 int 794 sndays(struct date *d) 795 { 796 797 if (nswitch != 0) 798 if (nswitch < ndaysj(d)) 799 return (ndaysg(d)); 800 else 801 return (ndaysj(d)); 802 else 803 return ndaysg(d); 804 } 805 806 /* 807 * Compute the number of days from date, obey the switch from 808 * Julian to Gregorian as used by UK and her colonies. 809 */ 810 int 811 sndaysb(struct date *d) 812 { 813 814 if (nswitchb < ndaysj(d)) 815 return (ndaysg(d)); 816 else 817 return (ndaysj(d)); 818 } 819 820 /* Inverse of sndays */ 821 struct date * 822 sdate(int nd, struct date *d) 823 { 824 825 if (nswitch < nd) 826 return (gdate(nd, d)); 827 else 828 return (jdate(nd, d)); 829 } 830 831 /* Inverse of sndaysb */ 832 struct date * 833 sdateb(int nd, struct date *d) 834 { 835 836 if (nswitchb < nd) 837 return (gdate(nd, d)); 838 else 839 return (jdate(nd, d)); 840 } 841 842 /* Center string t in string s of length w by putting enough leading blanks */ 843 char * 844 center(char *s, char *t, int w) 845 { 846 char blanks[80]; 847 848 memset(blanks, ' ', sizeof(blanks)); 849 sprintf(s, "%.*s%s", (int)(w - strlen(t)) / 2, blanks, t); 850 return (s); 851 } 852 853 int 854 parsemonth(const char *s) 855 { 856 int v; 857 char *cp; 858 struct tm tm; 859 860 v = (int)strtol(s, &cp, 10); 861 if (cp != s) 862 return (v); 863 if (strptime(s, "%B", &tm) != NULL) 864 return (tm.tm_mon + 1); 865 if (strptime(s, "%b", &tm) != NULL) 866 return (tm.tm_mon + 1); 867 return (0); 868 } 869