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 #include <term.h> 42 #undef lines /* term.h defines this */ 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 64 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 const char *term_so, *term_se; 161 int today; 162 163 char *center(char *s, char *t, int w); 164 void mkmonth(int year, int month, int jd_flag, struct monthlines * monthl); 165 void mkmonthb(int year, int month, int jd_flag, struct monthlines * monthl); 166 void mkweekdays(struct weekdays * wds); 167 int parsemonth(const char *s); 168 void printcc(void); 169 void printeaster(int year, int julian, int orthodox); 170 void printmonth(int year, int month, int jd_flag); 171 void printmonthb(int year, int month, int jd_flag); 172 void printyear(int year, int jd_flag); 173 void printyearb(int year, int jd_flag); 174 int firstday(int y, int m); 175 date *sdate(int ndays, struct date * d); 176 date *sdateb(int ndays, struct date * d); 177 int sndays(struct date * d); 178 int sndaysb(struct date * d); 179 static void usage(void); 180 int weekdayb(int nd); 181 182 int 183 main(int argc, char *argv[]) 184 { 185 struct djswitch *p, *q; /* to search user defined switch date */ 186 date never = {10000, 1, 1}; /* outside valid range of dates */ 187 date ukswitch = {1752, 9, 2};/* switch date for Great Britain */ 188 date dt; /* today as date */ 189 int ch; /* holds the option character */ 190 int m = 0; /* month */ 191 int y = 0; /* year */ 192 int flag_backward = 0; /* user called cal--backward compat. */ 193 int flag_hole_year = 0; /* user wants the whole year */ 194 int flag_julian_cal = 0; /* user wants Julian Calendar */ 195 int flag_julian_day = 0; /* user wants the Julian day 196 * numbers */ 197 int flag_orthodox = 0; /* use wants Orthodox easter */ 198 int flag_easter = 0; /* use wants easter date */ 199 char *cp; /* character pointer */ 200 char *locale; /* locale to get country code */ 201 char tbuf[1024], cbuf[512], *b; 202 time_t t; 203 struct tm *tm1; 204 205 term_se = term_so = NULL; 206 today = 0; 207 t = time(NULL); 208 tm1 = localtime(&t); 209 y = dt.y = tm1->tm_year + 1900; 210 m = dt.m = tm1->tm_mon + 1; 211 dt.d = tm1->tm_mday; 212 if (isatty(STDOUT_FILENO) && tgetent(tbuf, NULL) == 1) { 213 b = cbuf; 214 term_so = tgetstr("so", &b); 215 term_se = tgetstr("se", &b); 216 today = sndaysb(&dt); 217 } 218 219 /* 220 * Use locale to determine the country code, 221 * and use the country code to determine the default 222 * switchdate and date format from the switches table. 223 */ 224 if ((locale = setlocale(LC_ALL, "")) == NULL) 225 warn("setlocale"); 226 locale = setlocale(LC_TIME, NULL); 227 if (locale == NULL || 228 strcmp(locale, "C") == 0 || 229 strcmp(locale, "POSIX") == 0 || 230 strcmp(locale, "ASCII") == 0 || 231 strcmp(locale, "US-ASCII") == 0) 232 locale = "_US"; 233 q = switches + sizeof(switches) / sizeof(struct djswitch); 234 for (p = switches; p != q; p++) 235 if ((cp = strstr(locale, p->cc)) != NULL && *(cp - 1) == '_') 236 break; 237 if (p == q) { 238 nswitch = ndaysj(&dftswitch->dt); 239 } else { 240 nswitch = ndaysj(&p->dt); 241 dftswitch = p; 242 } 243 244 245 /* 246 * Get the filename portion of argv[0] and set flag_backward if 247 * this program is called "cal". 248 */ 249 for (cp = argv[0]; *cp; cp++) 250 ; 251 while (cp >= argv[0] && *cp != '/') 252 cp--; 253 if (strcmp("cal", ++cp) == 0) 254 flag_backward = 1; 255 256 /* Set the switch date to United Kingdom if backwards compatible */ 257 if (flag_backward) 258 nswitchb = ndaysj(&ukswitch); 259 260 while ((ch = getopt(argc, argv, "Jejops:wy")) != -1) 261 switch (ch) { 262 case 'J': 263 if (flag_backward) 264 usage(); 265 nswitch = ndaysj(&never); 266 flag_julian_cal = 1; 267 break; 268 case 'e': 269 if (flag_backward) 270 usage(); 271 flag_easter = 1; 272 break; 273 case 'j': 274 flag_julian_day = 1; 275 break; 276 case 'o': 277 if (flag_backward) 278 usage(); 279 flag_orthodox = 1; 280 flag_easter = 1; 281 break; 282 case 'p': 283 if (flag_backward) 284 usage(); 285 printcc(); 286 return (0); 287 break; 288 case 's': 289 if (flag_backward) 290 usage(); 291 q = switches + 292 sizeof(switches) / sizeof(struct djswitch); 293 for (p = switches; 294 p != q && strcmp(p->cc, optarg) != 0; p++) 295 ; 296 if (p == q) 297 errx(EX_USAGE, 298 "%s: invalid country code", optarg); 299 nswitch = ndaysj(&(p->dt)); 300 break; 301 case 'w': 302 if (flag_backward) 303 usage(); 304 flag_weeks = 1; 305 break; 306 case 'y': 307 flag_hole_year = 1; 308 break; 309 default: 310 usage(); 311 } 312 313 argc -= optind; 314 argv += optind; 315 316 switch (argc) { 317 case 2: 318 if (flag_easter) 319 usage(); 320 m = parsemonth(*argv++); 321 if (m < 1 || m > 12) 322 errx(EX_USAGE, 323 "%s is neither a month number (1..12) nor a name", 324 argv[-1]); 325 /* FALLTHROUGH */ 326 case 1: 327 if (strcmp(*argv, ".") == 0) 328 /* year was already set above */ 329 argv++; 330 else 331 y = atoi(*argv++); 332 if (y < 1 || y > 9999) 333 errx(EX_USAGE, "year %d not in range 1..9999", y); 334 break; 335 case 0: 336 break; 337 default: 338 usage(); 339 } 340 341 if (flag_easter) 342 printeaster(y, flag_julian_cal, flag_orthodox); 343 else if (argc == 1 || flag_hole_year) { 344 if (flag_backward) 345 printyearb(y, flag_julian_day); 346 else 347 printyear(y, flag_julian_day); 348 } else 349 if (flag_backward) 350 printmonthb(y, m, flag_julian_day); 351 else 352 printmonth(y, m, flag_julian_day); 353 354 return (0); 355 } 356 357 static void 358 usage(void) 359 { 360 361 fprintf(stderr, "%s\n%s\n%s\n", 362 "usage: cal [-jy] [[month] year]", 363 " ncal [-Jjpwy] [-s country_code] [[month] year]", 364 " ncal [-Jeo] [year]"); 365 exit(EX_USAGE); 366 } 367 368 /* print the assumed switches for all countries */ 369 void 370 printcc(void) 371 { 372 struct djswitch *p; 373 int n; /* number of lines to print */ 374 int m; /* offset from left to right table entry on the same line */ 375 376 #define FSTR "%c%s %-15s%4d-%02d-%02d" 377 #define DFLT(p) ((p) == dftswitch ? '*' : ' ') 378 #define FSTRARG(p) DFLT(p), (p)->cc, (p)->nm, (p)->dt.y, (p)->dt.m, (p)->dt.d 379 380 n = sizeof(switches) / sizeof(struct djswitch); 381 m = (n + 1) / 2; 382 n /= 2; 383 for (p = switches; p != switches + n; p++) 384 printf(FSTR" "FSTR"\n", FSTRARG(p), FSTRARG(p+m)); 385 if (m != n) 386 printf(FSTR"\n", FSTRARG(p)); 387 } 388 389 /* print the date of easter sunday */ 390 void 391 printeaster(int y, int julian, int orthodox) 392 { 393 date dt; 394 struct tm tm; 395 char buf[80]; 396 static int d_first = -1; 397 398 if (d_first < 0) 399 d_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 400 /* force orthodox easter for years before 1583 */ 401 if (y < 1583) 402 orthodox = 1; 403 404 if (orthodox) 405 if (julian) 406 easteroj(y, &dt); 407 else 408 easterog(y, &dt); 409 else 410 easterg(y, &dt); 411 412 memset(&tm, 0, sizeof(tm)); 413 tm.tm_year = dt.y - 1900; 414 tm.tm_mon = dt.m - 1; 415 tm.tm_mday = dt.d; 416 strftime(buf, sizeof(buf), d_first ? "%e %B %Y" : "%B %e %Y", &tm); 417 printf("%s\n", buf); 418 } 419 420 void 421 printmonth(int y, int m, int jd_flag) 422 { 423 struct monthlines month; 424 struct weekdays wds; 425 int i; 426 427 mkmonth(y, m - 1, jd_flag, &month); 428 mkweekdays(&wds); 429 printf(" %s %d\n", month.name, y); 430 for (i = 0; i != 7; i++) 431 printf("%.2s%s\n", wds.names[i], month.lines[i]); 432 if (flag_weeks) 433 printf(" %s\n", month.weeks); 434 } 435 436 void 437 printmonthb(int y, int m, int jd_flag) 438 { 439 struct monthlines month; 440 struct weekdays wds; 441 char s[MAX_WIDTH], t[MAX_WIDTH]; 442 int i; 443 int mw; 444 445 mkmonthb(y, m - 1, jd_flag, &month); 446 mkweekdays(&wds); 447 448 mw = jd_flag ? MONTH_WIDTH_B_J : MONTH_WIDTH_B; 449 450 sprintf(s, "%s %d", month.name, y); 451 printf("%s\n", center(t, s, mw)); 452 453 if (jd_flag) 454 printf(" %s %s %s %s %s %s %.2s\n", wds.names[6], wds.names[0], 455 wds.names[1], wds.names[2], wds.names[3], 456 wds.names[4], wds.names[5]); 457 else 458 printf("%s%s%s%s%s%s%.2s\n", wds.names[6], wds.names[0], 459 wds.names[1], wds.names[2], wds.names[3], 460 wds.names[4], wds.names[5]); 461 462 for (i = 0; i != 6; i++) 463 printf("%s\n", month.lines[i]+1); 464 } 465 466 void 467 printyear(int y, int jd_flag) 468 { 469 struct monthlines year[12]; 470 struct weekdays wds; 471 char s[80], t[80]; 472 int i, j; 473 int mpl; 474 int mw; 475 476 for (i = 0; i != 12; i++) 477 mkmonth(y, i, jd_flag, year + i); 478 mkweekdays(&wds); 479 mpl = jd_flag ? 3 : 4; 480 mw = jd_flag ? MONTH_WIDTH_J : MONTH_WIDTH; 481 482 sprintf(s, "%d", y); 483 printf("%s\n", center(t, s, mpl * mw)); 484 485 for (j = 0; j != 12; j += mpl) { 486 printf(" %-*s%-*s", 487 mw, year[j].name, 488 mw, year[j + 1].name); 489 if (mpl == 3) 490 printf("%s\n", year[j + 2].name); 491 else 492 printf("%-*s%s\n", 493 mw, year[j + 2].name, 494 year[j + 3].name); 495 for (i = 0; i != 7; i++) { 496 printf("%.2s%s%s", 497 wds.names[i], 498 year[j].lines[i], 499 year[j + 1].lines[i]); 500 if (mpl == 3) 501 printf("%s\n", year[j + 2].lines[i]); 502 else 503 printf("%s%s\n", 504 year[j + 2].lines[i], 505 year[j + 3].lines[i]); 506 } 507 if (flag_weeks) { 508 if (mpl == 3) 509 printf(" %s%s%-s\n", 510 year[j].weeks, 511 year[j + 1].weeks, 512 year[j + 2].weeks); 513 else 514 printf(" %s%s%s%-s\n", 515 year[j].weeks, 516 year[j + 1].weeks, 517 year[j + 2].weeks, 518 year[j + 3].weeks); 519 } 520 } 521 } 522 523 void 524 printyearb(int y, int jd_flag) 525 { 526 struct monthlines year[12]; 527 struct weekdays wds; 528 char s[80], t[80]; 529 int i, j; 530 int mpl; 531 int mw; 532 533 for (i = 0; i != 12; i++) 534 mkmonthb(y, i, jd_flag, year + i); 535 mkweekdays(&wds); 536 mpl = jd_flag ? 2 : 3; 537 mw = jd_flag ? MONTH_WIDTH_B_J : MONTH_WIDTH_B; 538 539 sprintf(s, "%d", y); 540 printf("%s\n\n", center(t, s, mw * mpl + mpl)); 541 542 for (j = 0; j != 12; j += mpl) { 543 printf("%-*s ", mw, center(s, year[j].name, mw)); 544 if (mpl == 2) 545 printf("%s\n", center(s, year[j + 1].name, mw)); 546 else 547 printf("%-*s %s\n", mw, 548 center(s, year[j + 1].name, mw), 549 center(t, year[j + 2].name, mw)); 550 551 if (mpl == 2) 552 printf(" %s %s %s %s %s %s %s " 553 " %s %s %s %s %s %s %.2s\n", 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 wds.names[6], wds.names[0], wds.names[1], 558 wds.names[2], wds.names[3], wds.names[4], 559 wds.names[5]); 560 else 561 printf("%s%s%s%s%s%s%s " 562 "%s%s%s%s%s%s%s " 563 "%s%s%s%s%s%s%.2s\n", 564 wds.names[6], wds.names[0], wds.names[1], 565 wds.names[2], wds.names[3], wds.names[4], 566 wds.names[5], 567 wds.names[6], wds.names[0], wds.names[1], 568 wds.names[2], wds.names[3], wds.names[4], 569 wds.names[5], 570 wds.names[6], wds.names[0], wds.names[1], 571 wds.names[2], wds.names[3], wds.names[4], 572 wds.names[5]); 573 for (i = 0; i != 6; i++) { 574 if (mpl == 2) 575 printf("%s %s\n", 576 year[j].lines[i]+1, 577 year[j + 1].lines[i]+1); 578 else 579 printf("%s %s %s\n", 580 year[j].lines[i]+1, 581 year[j + 1].lines[i]+1, 582 year[j + 2].lines[i]+1); 583 584 } 585 } 586 } 587 588 void 589 mkmonth(int y, int m, int jd_flag, struct monthlines *mlines) 590 { 591 592 struct tm tm; /* for strftime printing local names of 593 * months */ 594 date dt; /* handy date */ 595 int dw; /* width of numbers */ 596 int first; /* first day of month */ 597 int firstm; /* first day of first week of month */ 598 int i, j, k, l; /* just indices */ 599 int last; /* the first day of next month */ 600 int lastm; /* first day of first week of next month */ 601 int jan1 = 0; /* the first day of this year */ 602 char *ds; /* pointer to day strings (daystr or 603 * jdaystr) */ 604 605 /* Set name of month. */ 606 memset(&tm, 0, sizeof(tm)); 607 tm.tm_mon = m; 608 strftime(mlines->name, sizeof(mlines->name), "%OB", &tm); 609 mlines->name[0] = toupper((unsigned char)mlines->name[0]); 610 611 /* 612 * Set first and last to the day number of the first day of this 613 * month and the first day of next month respectively. Set jan1 to 614 * the day number of the first day of this year. 615 */ 616 first = firstday(y, m + 1); 617 if (m == 11) 618 last = firstday(y + 1, 1); 619 else 620 last = firstday(y, m + 2); 621 622 if (jd_flag) 623 jan1 = firstday(y, 1); 624 625 /* 626 * Set firstm to the day number of monday of the first week of 627 * this month. (This might be in the last month) 628 * Set lastm to the day number of monday of the first week of 629 * the next month. Our canvas spans [firstm, lastm). 630 */ 631 firstm = first - weekday(first); 632 lastm = last + 7 - weekday(last); 633 634 /* Set ds (daystring) and dw (daywidth) according to the jd_flag */ 635 if (jd_flag) { 636 ds = jdaystr; 637 dw = 4; 638 } else { 639 ds = daystr; 640 dw = 3; 641 } 642 643 /* 644 * Fill the lines with day of month or day of year (julian day) 645 * line index: i, each line is one weekday. column index: j, each 646 * column is one day number. print column index: k. 647 */ 648 for (i = 0; i != 7; i++) { 649 l = 0; 650 for (j = firstm + i, k = 0; j < lastm; j += 7, k += dw) { 651 if (j >= first && j < last) { 652 if (jd_flag) 653 dt.d = j - jan1 + 1; 654 else 655 sdate(j, &dt); 656 if (j == today && (term_so != NULL && term_se != NULL)) { 657 l = strlen(term_so); 658 /* separator */ 659 mlines->lines[i][k] = ' '; 660 } 661 /* the actual text */ 662 memcpy(mlines->lines[i] + k + l, 663 ds + dt.d * dw, dw); 664 if (j == today && (term_so != NULL && term_se != NULL)) { 665 /* highlight on */ 666 memcpy(mlines->lines[i] + k + 1, term_so, l); 667 /* highlight off */ 668 memcpy(mlines->lines[i] + k + l + dw, term_se, 669 strlen(term_se)); 670 l = strlen(term_se) + strlen(term_so); 671 } 672 } else 673 memcpy(mlines->lines[i] + k + l, " ", dw); 674 } 675 mlines->lines[i][k + l] = '\0'; 676 677 } 678 679 /* fill the weeknumbers */ 680 if (flag_weeks) { 681 for (j = firstm, k = 0; j < lastm; k += dw, j += 7) 682 if (j <= nswitch || j >= last) 683 memset(mlines->weeks + k, ' ', dw); 684 else 685 memcpy(mlines->weeks + k, 686 ds + week(j, &i)*dw, dw); 687 mlines->weeks[k] = '\0'; 688 } 689 } 690 691 void 692 mkmonthb(int y, int m, int jd_flag, struct monthlines *mlines) 693 { 694 695 struct tm tm; /* for strftime printing local names of 696 * months */ 697 date dt; /* handy date */ 698 int dw; /* width of numbers */ 699 int first; /* first day of month */ 700 int firsts; /* sunday of first week of month */ 701 int i, j, k, l; /* just indices */ 702 int jan1 = 0; /* the first day of this year */ 703 int last; /* the first day of next month */ 704 int lasts; /* sunday of first week of next month */ 705 char *ds; /* pointer to day strings (daystr or 706 * jdaystr) */ 707 708 /* Set ds (daystring) and dw (daywidth) according to the jd_flag */ 709 if (jd_flag) { 710 ds = jdaystr; 711 dw = 4; 712 } else { 713 ds = daystr; 714 dw = 3; 715 } 716 717 /* Set name of month centered */ 718 memset(&tm, 0, sizeof(tm)); 719 tm.tm_mon = m; 720 strftime(mlines->name, sizeof(mlines->name), "%OB", &tm); 721 mlines->name[0] = toupper((unsigned char)mlines->name[0]); 722 723 /* 724 * Set first and last to the day number of the first day of this 725 * month and the first day of next month respectively. Set jan1 to 726 * the day number of Jan 1st of this year. 727 */ 728 dt.y = y; 729 dt.m = m + 1; 730 dt.d = 1; 731 first = sndaysb(&dt); 732 if (m == 11) { 733 dt.y = y + 1; 734 dt.m = 1; 735 dt.d = 1; 736 } else { 737 dt.y = y; 738 dt.m = m + 2; 739 dt.d = 1; 740 } 741 last = sndaysb(&dt); 742 743 if (jd_flag) { 744 dt.y = y; 745 dt.m = 1; 746 dt.d = 1; 747 jan1 = sndaysb(&dt); 748 } 749 750 /* 751 * Set firsts to the day number of sunday of the first week of 752 * this month. (This might be in the last month) 753 * Set lasts to the day number of sunday of the first week of 754 * the next month. Our canvas spans [firsts, lasts). 755 */ 756 firsts = first - (weekday(first)+1) % 7; 757 lasts = last + 7 - (weekday(last)+1) % 7; 758 759 /* 760 * Fill the lines with day of month or day of year (Julian day) 761 * line index: i, each line is one week. column index: j, each 762 * column is one day number. print column index: k. 763 */ 764 for (i = 0; i != 6; i++) { 765 l = 0; 766 for (j = firsts + 7 * i, k = 0; j < lasts && k != dw * 7; 767 j++, k += dw) { 768 if (j >= first && j < last) { 769 if (jd_flag) 770 dt.d = j - jan1 + 1; 771 else 772 sdateb(j, &dt); 773 if (j == today && (term_so != NULL && term_se != NULL)) { 774 l = strlen(term_so); 775 /* separator */ 776 mlines->lines[i][k] = ' '; 777 } 778 /* the actual text */ 779 memcpy(mlines->lines[i] + k + l, 780 ds + dt.d * dw, dw); 781 if (j == today && (term_so != NULL && term_se != NULL)) { 782 /* highlight on */ 783 memcpy(mlines->lines[i] + k + 1, term_so, l); 784 /* highlight off */ 785 memcpy(mlines->lines[i] + k + l + dw, term_se, 786 strlen(term_se)); 787 l = strlen(term_se) + strlen(term_so); 788 } 789 } else 790 memcpy(mlines->lines[i] + k + l, " ", dw); 791 } 792 if (k == 0) 793 mlines->lines[i][1] = '\0'; 794 else 795 mlines->lines[i][k + l] = '\0'; 796 } 797 } 798 799 /* Put the local names of weekdays into the wds */ 800 void 801 mkweekdays(struct weekdays *wds) 802 { 803 int i, len; 804 struct tm tm; 805 char buf[20]; 806 807 memset(&tm, 0, sizeof(tm)); 808 809 for (i = 0; i != 7; i++) { 810 tm.tm_wday = (i+1) % 7; 811 strftime(buf, sizeof(buf), "%a", &tm); 812 len = strlen(buf); 813 if (len > 2) 814 len = 2; 815 strcpy(wds->names[i], " "); 816 strncpy(wds->names[i] + 2 - len, buf, len); 817 } 818 } 819 820 /* 821 * Compute the day number of the first 822 * existing date after the first day in month. 823 * (the first day in month and even the month might not exist!) 824 */ 825 int 826 firstday(int y, int m) 827 { 828 date dt; 829 int nd; 830 831 dt.y = y; 832 dt.m = m; 833 dt.d = 1; 834 nd = sndays(&dt); 835 for (;;) { 836 sdate(nd, &dt); 837 if ((dt.m >= m && dt.y == y) || dt.y > y) 838 return (nd); 839 else 840 nd++; 841 } 842 /* NEVER REACHED */ 843 } 844 845 /* 846 * Compute the number of days from date, obey the local switch from 847 * Julian to Gregorian if specified by the user. 848 */ 849 int 850 sndays(struct date *d) 851 { 852 853 if (nswitch != 0) 854 if (nswitch < ndaysj(d)) 855 return (ndaysg(d)); 856 else 857 return (ndaysj(d)); 858 else 859 return ndaysg(d); 860 } 861 862 /* 863 * Compute the number of days from date, obey the switch from 864 * Julian to Gregorian as used by UK and her colonies. 865 */ 866 int 867 sndaysb(struct date *d) 868 { 869 870 if (nswitchb < ndaysj(d)) 871 return (ndaysg(d)); 872 else 873 return (ndaysj(d)); 874 } 875 876 /* Inverse of sndays */ 877 struct date * 878 sdate(int nd, struct date *d) 879 { 880 881 if (nswitch < nd) 882 return (gdate(nd, d)); 883 else 884 return (jdate(nd, d)); 885 } 886 887 /* Inverse of sndaysb */ 888 struct date * 889 sdateb(int nd, struct date *d) 890 { 891 892 if (nswitchb < nd) 893 return (gdate(nd, d)); 894 else 895 return (jdate(nd, d)); 896 } 897 898 /* Center string t in string s of length w by putting enough leading blanks */ 899 char * 900 center(char *s, char *t, int w) 901 { 902 char blanks[80]; 903 904 memset(blanks, ' ', sizeof(blanks)); 905 sprintf(s, "%.*s%s", (int)(w - strlen(t)) / 2, blanks, t); 906 return (s); 907 } 908 909 int 910 parsemonth(const char *s) 911 { 912 int v; 913 char *cp; 914 struct tm tm; 915 916 v = (int)strtol(s, &cp, 10); 917 if (cp != s) 918 return (v); 919 if (strptime(s, "%B", &tm) != NULL) 920 return (tm.tm_mon + 1); 921 if (strptime(s, "%b", &tm) != NULL) 922 return (tm.tm_mon + 1); 923 return (0); 924 } 925