1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 1997 Wolfgang Helbig 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <calendar.h> 33 #include <ctype.h> 34 #include <err.h> 35 #include <langinfo.h> 36 #include <libgen.h> 37 #include <locale.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <sysexits.h> 42 #include <time.h> 43 #include <unistd.h> 44 #include <wchar.h> 45 #include <wctype.h> 46 #include <term.h> 47 #undef lines /* term.h defines this */ 48 49 /* Width of one month with backward compatibility and in regular mode*/ 50 #define MONTH_WIDTH_B_J 27 51 #define MONTH_WIDTH_B 20 52 53 #define MONTH_WIDTH_R_J 24 54 #define MONTH_WIDTH_R 18 55 56 #define MAX_WIDTH 64 57 58 typedef struct date date; 59 60 struct monthlines { 61 wchar_t name[MAX_WIDTH + 1]; 62 char lines[7][MAX_WIDTH + 1]; 63 char weeks[MAX_WIDTH + 1]; 64 unsigned int extralen[7]; 65 }; 66 67 struct weekdays { 68 wchar_t names[7][4]; 69 }; 70 71 /* The switches from Julian to Gregorian in some countries */ 72 static struct djswitch { 73 const char *cc; /* Country code according to ISO 3166 */ 74 const char *nm; /* Name of country */ 75 date dt; /* Last day of Julian calendar */ 76 } switches[] = { 77 {"AL", "Albania", {1912, 11, 30}}, 78 {"AT", "Austria", {1583, 10, 5}}, 79 {"AU", "Australia", {1752, 9, 2}}, 80 {"BE", "Belgium", {1582, 12, 14}}, 81 {"BG", "Bulgaria", {1916, 3, 18}}, 82 {"CA", "Canada", {1752, 9, 2}}, 83 {"CH", "Switzerland", {1655, 2, 28}}, 84 {"CN", "China", {1911, 12, 18}}, 85 {"CZ", "Czech Republic",{1584, 1, 6}}, 86 {"DE", "Germany", {1700, 2, 18}}, 87 {"DK", "Denmark", {1700, 2, 18}}, 88 {"ES", "Spain", {1582, 10, 4}}, 89 {"FI", "Finland", {1753, 2, 17}}, 90 {"FR", "France", {1582, 12, 9}}, 91 {"GB", "United Kingdom",{1752, 9, 2}}, 92 {"GR", "Greece", {1924, 3, 9}}, 93 {"HU", "Hungary", {1587, 10, 21}}, 94 {"IS", "Iceland", {1700, 11, 16}}, 95 {"IT", "Italy", {1582, 10, 4}}, 96 {"JP", "Japan", {1918, 12, 18}}, 97 {"LI", "Lithuania", {1918, 2, 1}}, 98 {"LN", "Latin", {9999, 05, 31}}, 99 {"LU", "Luxembourg", {1582, 12, 14}}, 100 {"LV", "Latvia", {1918, 2, 1}}, 101 {"NL", "Netherlands", {1582, 12, 14}}, 102 {"NO", "Norway", {1700, 2, 18}}, 103 {"PL", "Poland", {1582, 10, 4}}, 104 {"PT", "Portugal", {1582, 10, 4}}, 105 {"RO", "Romania", {1919, 3, 31}}, 106 {"RU", "Russia", {1918, 1, 31}}, 107 {"SI", "Slovenia", {1919, 3, 4}}, 108 {"SE", "Sweden", {1753, 2, 17}}, 109 {"TR", "Turkey", {1926, 12, 18}}, 110 {"US", "United States", {1752, 9, 2}}, 111 {"YU", "Yugoslavia", {1919, 3, 4}} 112 }; 113 114 static struct djswitch *dftswitch = 115 switches + sizeof(switches) / sizeof(struct djswitch) - 2; 116 /* default switch (should be "US") */ 117 118 /* Table used to print day of month and week numbers */ 119 static char daystr[] = " 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15" 120 " 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31" 121 " 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47" 122 " 48 49 50 51 52 53"; 123 124 /* Table used to print day of year and week numbers */ 125 static char jdaystr[] = " 1 2 3 4 5 6 7 8 9" 126 " 10 11 12 13 14 15 16 17 18 19" 127 " 20 21 22 23 24 25 26 27 28 29" 128 " 30 31 32 33 34 35 36 37 38 39" 129 " 40 41 42 43 44 45 46 47 48 49" 130 " 50 51 52 53 54 55 56 57 58 59" 131 " 60 61 62 63 64 65 66 67 68 69" 132 " 70 71 72 73 74 75 76 77 78 79" 133 " 80 81 82 83 84 85 86 87 88 89" 134 " 90 91 92 93 94 95 96 97 98 99" 135 " 100 101 102 103 104 105 106 107 108 109" 136 " 110 111 112 113 114 115 116 117 118 119" 137 " 120 121 122 123 124 125 126 127 128 129" 138 " 130 131 132 133 134 135 136 137 138 139" 139 " 140 141 142 143 144 145 146 147 148 149" 140 " 150 151 152 153 154 155 156 157 158 159" 141 " 160 161 162 163 164 165 166 167 168 169" 142 " 170 171 172 173 174 175 176 177 178 179" 143 " 180 181 182 183 184 185 186 187 188 189" 144 " 190 191 192 193 194 195 196 197 198 199" 145 " 200 201 202 203 204 205 206 207 208 209" 146 " 210 211 212 213 214 215 216 217 218 219" 147 " 220 221 222 223 224 225 226 227 228 229" 148 " 230 231 232 233 234 235 236 237 238 239" 149 " 240 241 242 243 244 245 246 247 248 249" 150 " 250 251 252 253 254 255 256 257 258 259" 151 " 260 261 262 263 264 265 266 267 268 269" 152 " 270 271 272 273 274 275 276 277 278 279" 153 " 280 281 282 283 284 285 286 287 288 289" 154 " 290 291 292 293 294 295 296 297 298 299" 155 " 300 301 302 303 304 305 306 307 308 309" 156 " 310 311 312 313 314 315 316 317 318 319" 157 " 320 321 322 323 324 325 326 327 328 329" 158 " 330 331 332 333 334 335 336 337 338 339" 159 " 340 341 342 343 344 345 346 347 348 349" 160 " 350 351 352 353 354 355 356 357 358 359" 161 " 360 361 362 363 364 365 366"; 162 163 static int flag_nohighlight; /* user doesn't want a highlighted today */ 164 static int flag_weeks; /* user wants number of week */ 165 static int nswitch; /* user defined switch date */ 166 static int nswitchb; /* switch date for backward compatibility */ 167 static int highlightdate; 168 169 static char *center(char *s, char *t, int w); 170 static wchar_t *wcenter(wchar_t *s, wchar_t *t, int w); 171 static int firstday(int y, int m); 172 static void highlight(char *dst, char *src, int len, int *extraletters); 173 static void mkmonthr(int year, int month, int jd_flag, 174 struct monthlines * monthl); 175 static void mkmonthb(int year, int month, int jd_flag, 176 struct monthlines * monthl); 177 static void mkweekdays(struct weekdays * wds); 178 static void monthranger(int year, int m, int jd_flag, 179 int before, int after); 180 static void monthrangeb(int year, int m, int jd_flag, 181 int before, int after); 182 static int parsemonth(const char *s, int *m, int *y); 183 static void printcc(void); 184 static void printeaster(int year, int julian, int orthodox); 185 static date *sdater(int ndays, struct date * d); 186 static date *sdateb(int ndays, struct date * d); 187 static int sndaysr(struct date * d); 188 static int sndaysb(struct date * d); 189 static void usage(void); 190 191 int 192 main(int argc, char *argv[]) 193 { 194 struct djswitch *p, *q; /* to search user defined switch date */ 195 date never = {10000, 1, 1}; /* outside valid range of dates */ 196 date ukswitch = {1752, 9, 2};/* switch date for Great Britain */ 197 date dt; 198 int ch; /* holds the option character */ 199 int m = 0; /* month */ 200 int y = 0; /* year */ 201 int flag_backward = 0; /* user called cal--backward compat. */ 202 int flag_wholeyear = 0; /* user wants the whole year */ 203 int flag_julian_cal = 0; /* user wants Julian Calendar */ 204 int flag_julian_day = 0; /* user wants the Julian day numbers */ 205 int flag_orthodox = 0; /* user wants Orthodox easter */ 206 int flag_easter = 0; /* user wants easter date */ 207 int flag_3months = 0; /* user wants 3 month display (-3) */ 208 int flag_after = 0; /* user wants to see months after */ 209 int flag_before = 0; /* user wants to see months before */ 210 int flag_specifiedmonth = 0;/* user wants to see this month (-m) */ 211 int flag_givenmonth = 0; /* user has specified month [n] */ 212 int flag_givenyear = 0; /* user has specified year [n] */ 213 char *cp; /* character pointer */ 214 char *flag_today = NULL; /* debug: use date as being today */ 215 char *flag_month = NULL; /* requested month as string */ 216 char *flag_highlightdate = NULL; /* debug: date to highlight */ 217 int before, after; 218 const char *locale; /* locale to get country code */ 219 220 flag_nohighlight = 0; 221 flag_weeks = 0; 222 223 /* 224 * Use locale to determine the country code, 225 * and use the country code to determine the default 226 * switchdate and date format from the switches table. 227 */ 228 if (setlocale(LC_ALL, "") == NULL) 229 warn("setlocale"); 230 locale = setlocale(LC_TIME, NULL); 231 if (locale == NULL || 232 strcmp(locale, "C") == 0 || 233 strcmp(locale, "POSIX") == 0 || 234 strcmp(locale, "ASCII") == 0 || 235 strcmp(locale, "US-ASCII") == 0) 236 locale = "_US"; 237 q = switches + sizeof(switches) / sizeof(struct djswitch); 238 for (p = switches; p != q; p++) 239 if ((cp = strstr(locale, p->cc)) != NULL && *(cp - 1) == '_') 240 break; 241 if (p == q) { 242 nswitch = ndaysj(&dftswitch->dt); 243 } else { 244 nswitch = ndaysj(&p->dt); 245 dftswitch = p; 246 } 247 248 249 /* 250 * Get the filename portion of argv[0] and set flag_backward if 251 * this program is called "cal". 252 */ 253 if (strncmp(basename(argv[0]), "cal", strlen("cal")) == 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 before = after = -1; 261 262 while ((ch = getopt(argc, argv, "3A:B:Cd:eH:hjJm:Nops:wy")) != -1) 263 switch (ch) { 264 case '3': 265 flag_3months = 1; 266 break; 267 case 'A': 268 if (flag_after > 0) 269 errx(EX_USAGE, "Double -A specified"); 270 flag_after = strtol(optarg, NULL, 10); 271 if (flag_after <= 0) 272 errx(EX_USAGE, 273 "Argument to -A must be positive"); 274 break; 275 case 'B': 276 if (flag_before > 0) 277 errx(EX_USAGE, "Double -A specified"); 278 flag_before = strtol(optarg, NULL, 10); 279 if (flag_before <= 0) 280 errx(EX_USAGE, 281 "Argument to -B must be positive"); 282 break; 283 case 'J': 284 if (flag_backward) 285 usage(); 286 nswitch = ndaysj(&never); 287 flag_julian_cal = 1; 288 break; 289 case 'C': 290 flag_backward = 1; 291 break; 292 case 'N': 293 flag_backward = 0; 294 break; 295 case 'd': 296 flag_today = optarg; 297 break; 298 case 'H': 299 flag_highlightdate = optarg; 300 break; 301 case 'h': 302 flag_nohighlight = 1; 303 break; 304 case 'e': 305 if (flag_backward) 306 usage(); 307 flag_easter = 1; 308 break; 309 case 'j': 310 flag_julian_day = 1; 311 break; 312 case 'm': 313 if (flag_specifiedmonth) 314 errx(EX_USAGE, "Double -m specified"); 315 flag_month = optarg; 316 flag_specifiedmonth = 1; 317 break; 318 case 'o': 319 if (flag_backward) 320 usage(); 321 flag_orthodox = 1; 322 flag_easter = 1; 323 break; 324 case 'p': 325 if (flag_backward) 326 usage(); 327 printcc(); 328 return (0); 329 break; 330 case 's': 331 if (flag_backward) 332 usage(); 333 q = switches + 334 sizeof(switches) / sizeof(struct djswitch); 335 for (p = switches; 336 p != q && strcmp(p->cc, optarg) != 0; p++) 337 ; 338 if (p == q) 339 errx(EX_USAGE, 340 "%s: invalid country code", optarg); 341 nswitch = ndaysj(&(p->dt)); 342 break; 343 case 'w': 344 if (flag_backward) 345 usage(); 346 flag_weeks = 1; 347 break; 348 case 'y': 349 flag_wholeyear = 1; 350 break; 351 default: 352 usage(); 353 } 354 355 argc -= optind; 356 argv += optind; 357 358 switch (argc) { 359 case 2: 360 if (flag_easter) 361 usage(); 362 flag_month = *argv++; 363 flag_givenmonth = 1; 364 m = strtol(flag_month, NULL, 10); 365 /* FALLTHROUGH */ 366 case 1: 367 y = atoi(*argv); 368 if (y < 1 || y > 9999) 369 errx(EX_USAGE, "year `%s' not in range 1..9999", *argv); 370 argv++; 371 flag_givenyear = 1; 372 break; 373 case 0: 374 if (flag_today != NULL) { 375 y = strtol(flag_today, NULL, 10); 376 m = strtol(flag_today + 5, NULL, 10); 377 } else { 378 time_t t; 379 struct tm *tm; 380 381 t = time(NULL); 382 tm = localtime(&t); 383 y = tm->tm_year + 1900; 384 m = tm->tm_mon + 1; 385 } 386 break; 387 default: 388 usage(); 389 } 390 391 if (flag_month != NULL) { 392 if (parsemonth(flag_month, &m, &y)) { 393 errx(EX_USAGE, 394 "%s is neither a month number (1..12) nor a name", 395 flag_month); 396 } 397 } 398 399 /* 400 * What is not supported: 401 * -3 with -A or -B 402 * -3 displays 3 months, -A and -B change that behaviour. 403 * -3 with -y 404 * -3 displays 3 months, -y says display a whole year. 405 * -3 with a given year but no given month or without -m 406 * -3 displays 3 months, no month specified doesn't make clear 407 * which three months. 408 * -m with a given month 409 * conflicting arguments, both specify the same field. 410 * -y with -m 411 * -y displays the whole year, -m displays a single month. 412 * -y with a given month 413 * -y displays the whole year, the given month displays a single 414 * month. 415 * -y with -A or -B 416 * -y displays the whole year, -A and -B display extra months. 417 */ 418 419 /* -3 together with -A or -B. */ 420 if (flag_3months && (flag_after || flag_before)) 421 errx(EX_USAGE, "-3 together with -A and -B is not supported."); 422 /* -3 together with -y. */ 423 if (flag_3months && flag_wholeyear) 424 errx(EX_USAGE, "-3 together with -y is not supported."); 425 /* -3 together with givenyear but no givenmonth. */ 426 if (flag_3months && flag_givenyear && 427 !(flag_givenmonth || flag_specifiedmonth)) 428 errx(EX_USAGE, 429 "-3 together with a given year but no given month is " 430 "not supported."); 431 /* -m together with xx xxxx. */ 432 if (flag_specifiedmonth && flag_givenmonth) 433 errx(EX_USAGE, 434 "-m together with a given month is not supported."); 435 /* -y together with -m. */ 436 if (flag_wholeyear && flag_specifiedmonth) 437 errx(EX_USAGE, "-y together with -m is not supported."); 438 /* -y together with xx xxxx. */ 439 if (flag_wholeyear && flag_givenmonth) 440 errx(EX_USAGE, "-y together a given month is not supported."); 441 /* -y together with -A or -B. */ 442 if (flag_wholeyear && (flag_before > 0 || flag_after > 0)) 443 errx(EX_USAGE, "-y together a -A or -B is not supported."); 444 /* The rest should be fine. */ 445 446 /* Select the period to display, in order of increasing priority .*/ 447 if (flag_wholeyear || 448 (flag_givenyear && !(flag_givenmonth || flag_specifiedmonth))) { 449 m = 1; 450 before = 0; 451 after = 11; 452 } 453 if (flag_givenyear && flag_givenmonth) { 454 before = 0; 455 after = 0; 456 } 457 if (flag_specifiedmonth) { 458 before = 0; 459 after = 0; 460 } 461 if (flag_before) { 462 before = flag_before; 463 } 464 if (flag_after) { 465 after = flag_after; 466 } 467 if (flag_3months) { 468 before = 1; 469 after = 1; 470 } 471 if (after == -1) 472 after = 0; 473 if (before == -1) 474 before = 0; 475 476 /* Highlight a specified day or today .*/ 477 if (flag_highlightdate != NULL) { 478 dt.y = strtol(flag_highlightdate, NULL, 10); 479 dt.m = strtol(flag_highlightdate + 5, NULL, 10); 480 dt.d = strtol(flag_highlightdate + 8, NULL, 10); 481 } else { 482 time_t t; 483 struct tm *tm1; 484 485 t = time(NULL); 486 tm1 = localtime(&t); 487 dt.y = tm1->tm_year + 1900; 488 dt.m = tm1->tm_mon + 1; 489 dt.d = tm1->tm_mday; 490 } 491 highlightdate = sndaysb(&dt); 492 493 /* And now we finally start to calculate and output calendars. */ 494 if (flag_easter) 495 printeaster(y, flag_julian_cal, flag_orthodox); 496 else 497 if (flag_backward) 498 monthrangeb(y, m, flag_julian_day, before, after); 499 else 500 monthranger(y, m, flag_julian_day, before, after); 501 return (0); 502 } 503 504 static void 505 usage(void) 506 { 507 508 fputs( 509 "Usage: cal [general options] [-hjy] [[month] year]\n" 510 " cal [general options] [-hj] [-m month] [year]\n" 511 " ncal [general options] [-hJjpwy] [-s country_code] [[month] year]\n" 512 " ncal [general options] [-hJeo] [year]\n" 513 "General options: [-NC3] [-A months] [-B months]\n" 514 "For debug the highlighting: [-H yyyy-mm-dd] [-d yyyy-mm]\n", 515 stderr); 516 exit(EX_USAGE); 517 } 518 519 /* Print the assumed switches for all countries. */ 520 static void 521 printcc(void) 522 { 523 struct djswitch *p; 524 int n; /* number of lines to print */ 525 int m; /* offset from left to right table entry on the same line */ 526 527 #define FSTR "%c%s %-15s%4d-%02d-%02d" 528 #define DFLT(p) ((p) == dftswitch ? '*' : ' ') 529 #define FSTRARG(p) DFLT(p), (p)->cc, (p)->nm, (p)->dt.y, (p)->dt.m, (p)->dt.d 530 531 n = sizeof(switches) / sizeof(struct djswitch); 532 m = (n + 1) / 2; 533 n /= 2; 534 for (p = switches; p != switches + n; p++) 535 printf(FSTR" "FSTR"\n", FSTRARG(p), FSTRARG(p+m)); 536 if (m != n) 537 printf(FSTR"\n", FSTRARG(p)); 538 } 539 540 /* Print the date of easter sunday. */ 541 static void 542 printeaster(int y, int julian, int orthodox) 543 { 544 date dt; 545 struct tm tm; 546 char buf[MAX_WIDTH]; 547 static int d_first = -1; 548 549 if (d_first < 0) 550 d_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 551 /* force orthodox easter for years before 1583 */ 552 if (y < 1583) 553 orthodox = 1; 554 555 if (orthodox) 556 if (julian) 557 easteroj(y, &dt); 558 else 559 easterog(y, &dt); 560 else 561 easterg(y, &dt); 562 563 memset(&tm, 0, sizeof(tm)); 564 tm.tm_year = dt.y - 1900; 565 tm.tm_mon = dt.m - 1; 566 tm.tm_mday = dt.d; 567 strftime(buf, sizeof(buf), d_first ? "%e %B %Y" : "%B %e %Y", &tm); 568 printf("%s\n", buf); 569 } 570 571 #define MW(mw, me) ((mw) + me) 572 #define DECREASEMONTH(m, y) \ 573 if (--m == 0) { \ 574 m = 12; \ 575 y--; \ 576 } 577 #define INCREASEMONTH(m, y) \ 578 if (++(m) == 13) { \ 579 (m) = 1; \ 580 (y)++; \ 581 } 582 #define M2Y(m) ((m) / 12) 583 #define M2M(m) (1 + (m) % 12) 584 585 /* Print all months for the period in the range [ before .. y-m .. after ]. */ 586 static void 587 monthrangeb(int y, int m, int jd_flag, int before, int after) 588 { 589 struct monthlines year[12]; 590 struct weekdays wds; 591 char s[MAX_WIDTH], t[MAX_WIDTH]; 592 wchar_t ws[MAX_WIDTH], ws1[MAX_WIDTH]; 593 const char *wdss; 594 int i, j; 595 int mpl; 596 int mw; 597 int m1, m2; 598 int printyearheader; 599 int prevyear = -1; 600 601 mpl = jd_flag ? 2 : 3; 602 mw = jd_flag ? MONTH_WIDTH_B_J : MONTH_WIDTH_B; 603 wdss = (mpl == 2) ? " " : ""; 604 605 while (before != 0) { 606 DECREASEMONTH(m, y); 607 before--; 608 after++; 609 } 610 m1 = y * 12 + m - 1; 611 m2 = m1 + after; 612 613 mkweekdays(&wds); 614 615 /* 616 * The year header is printed when there are more than 'mpl' months 617 * and if the first month is a multitude of 'mpl'. 618 * If not, it will print the year behind every month. 619 */ 620 printyearheader = (after >= mpl - 1) && (M2M(m1) - 1) % mpl == 0; 621 622 m = m1; 623 while (m <= m2) { 624 int count = 0; 625 for (i = 0; i != mpl && m + i <= m2; i++) { 626 mkmonthb(M2Y(m + i), M2M(m + i) - 1, jd_flag, year + i); 627 count++; 628 } 629 630 /* Empty line between two rows of months */ 631 if (m != m1) 632 printf("\n"); 633 634 /* Year at the top. */ 635 if (printyearheader && M2Y(m) != prevyear) { 636 sprintf(s, "%d", M2Y(m)); 637 printf("%s\n", center(t, s, mpl * mw)); 638 prevyear = M2Y(m); 639 } 640 641 /* Month names. */ 642 for (i = 0; i < count; i++) 643 if (printyearheader) 644 wprintf(L"%-*ls ", 645 mw, wcenter(ws, year[i].name, mw)); 646 else { 647 swprintf(ws, sizeof(ws)/sizeof(ws[0]), 648 L"%-ls %d", year[i].name, M2Y(m + i)); 649 wprintf(L"%-*ls ", mw, wcenter(ws1, ws, mw)); 650 } 651 printf("\n"); 652 653 /* Day of the week names. */ 654 for (i = 0; i < count; i++) { 655 wprintf(L"%s%ls%s%ls%s%ls%s%ls%s%ls%s%ls%s%ls ", 656 wdss, wds.names[6], wdss, wds.names[0], 657 wdss, wds.names[1], wdss, wds.names[2], 658 wdss, wds.names[3], wdss, wds.names[4], 659 wdss, wds.names[5]); 660 } 661 printf("\n"); 662 663 /* And the days of the month. */ 664 for (i = 0; i != 6; i++) { 665 for (j = 0; j < count; j++) 666 printf("%-*s ", 667 MW(mw, year[j].extralen[i]), 668 year[j].lines[i]+1); 669 printf("\n"); 670 } 671 672 m += mpl; 673 } 674 } 675 676 static void 677 monthranger(int y, int m, int jd_flag, int before, int after) 678 { 679 struct monthlines year[12]; 680 struct weekdays wds; 681 char s[MAX_WIDTH], t[MAX_WIDTH]; 682 int i, j; 683 int mpl; 684 int mw; 685 int m1, m2; 686 int prevyear = -1; 687 int printyearheader; 688 689 mpl = jd_flag ? 3 : 4; 690 mw = jd_flag ? MONTH_WIDTH_R_J : MONTH_WIDTH_R; 691 692 while (before != 0) { 693 DECREASEMONTH(m, y); 694 before--; 695 after++; 696 } 697 m1 = y * 12 + m - 1; 698 m2 = m1 + after; 699 700 mkweekdays(&wds); 701 702 /* 703 * The year header is printed when there are more than 'mpl' months 704 * and if the first month is a multitude of 'mpl'. 705 * If not, it will print the year behind every month. 706 */ 707 printyearheader = (after >= mpl - 1) && (M2M(m1) - 1) % mpl == 0; 708 709 m = m1; 710 while (m <= m2) { 711 int count = 0; 712 for (i = 0; i != mpl && m + i <= m2; i++) { 713 mkmonthr(M2Y(m + i), M2M(m + i) - 1, jd_flag, year + i); 714 count++; 715 } 716 717 /* Empty line between two rows of months. */ 718 if (m != m1) 719 printf("\n"); 720 721 /* Year at the top. */ 722 if (printyearheader && M2Y(m) != prevyear) { 723 sprintf(s, "%d", M2Y(m)); 724 printf("%s\n", center(t, s, mpl * mw)); 725 prevyear = M2Y(m); 726 } 727 728 /* Month names. */ 729 wprintf(L" "); 730 for (i = 0; i < count; i++) 731 if (printyearheader) 732 wprintf(L"%-*ls", mw, year[i].name); 733 else 734 wprintf(L"%-ls %-*d", year[i].name, 735 mw - wcslen(year[i].name) - 1, M2Y(m + i)); 736 printf("\n"); 737 738 /* And the days of the month. */ 739 for (i = 0; i != 7; i++) { 740 /* Week day */ 741 wprintf(L"%.2ls", wds.names[i]); 742 743 /* Full months */ 744 for (j = 0; j < count; j++) 745 printf("%-*s", 746 MW(mw, year[j].extralen[i]), 747 year[j].lines[i]); 748 printf("\n"); 749 } 750 751 /* Week numbers. */ 752 if (flag_weeks) { 753 printf(" "); 754 for (i = 0; i < count; i++) 755 printf("%-*s", mw, year[i].weeks); 756 printf("\n"); 757 } 758 759 m += mpl; 760 } 761 return; 762 } 763 764 static void 765 mkmonthr(int y, int m, int jd_flag, struct monthlines *mlines) 766 { 767 768 struct tm tm; /* for strftime printing local names of 769 * months */ 770 date dt; /* handy date */ 771 int dw; /* width of numbers */ 772 int first; /* first day of month */ 773 int firstm; /* first day of first week of month */ 774 int i, j, k, l; /* just indices */ 775 int last; /* the first day of next month */ 776 int jan1 = 0; /* the first day of this year */ 777 char *ds; /* pointer to day strings (daystr or 778 * jdaystr) */ 779 780 /* Set name of month. */ 781 memset(&tm, 0, sizeof(tm)); 782 tm.tm_mon = m; 783 wcsftime(mlines->name, sizeof(mlines->name) / sizeof(mlines->name[0]), 784 L"%OB", &tm); 785 mlines->name[0] = towupper(mlines->name[0]); 786 787 /* 788 * Set first and last to the day number of the first day of this 789 * month and the first day of next month respectively. Set jan1 to 790 * the day number of the first day of this year. 791 */ 792 first = firstday(y, m + 1); 793 if (m == 11) 794 last = firstday(y + 1, 1); 795 else 796 last = firstday(y, m + 2); 797 798 if (jd_flag) 799 jan1 = firstday(y, 1); 800 801 /* 802 * Set firstm to the day number of monday of the first week of 803 * this month. (This might be in the last month) 804 */ 805 firstm = first - weekday(first); 806 807 /* Set ds (daystring) and dw (daywidth) according to the jd_flag. */ 808 if (jd_flag) { 809 ds = jdaystr; 810 dw = 4; 811 } else { 812 ds = daystr; 813 dw = 3; 814 } 815 816 /* 817 * Fill the lines with day of month or day of year (julian day) 818 * line index: i, each line is one weekday. column index: j, each 819 * column is one day number. print column index: k. 820 */ 821 for (i = 0; i != 7; i++) { 822 l = 0; 823 for (j = firstm + i, k = 0; j < last; j += 7, k += dw) { 824 if (j >= first) { 825 if (jd_flag) 826 dt.d = j - jan1 + 1; 827 else 828 sdater(j, &dt); 829 if (j == highlightdate && !flag_nohighlight 830 && isatty(STDOUT_FILENO)) 831 highlight(mlines->lines[i] + k, 832 ds + dt.d * dw, dw, &l); 833 else 834 memcpy(mlines->lines[i] + k + l, 835 ds + dt.d * dw, dw); 836 } else 837 memcpy(mlines->lines[i] + k + l, " ", dw); 838 } 839 mlines->lines[i][k + l] = '\0'; 840 mlines->extralen[i] = l; 841 } 842 843 /* fill the weeknumbers. */ 844 if (flag_weeks) { 845 for (j = firstm, k = 0; j < last; k += dw, j += 7) 846 if (j <= nswitch) 847 memset(mlines->weeks + k, ' ', dw); 848 else 849 memcpy(mlines->weeks + k, 850 ds + week(j, &i)*dw, dw); 851 mlines->weeks[k] = '\0'; 852 } 853 } 854 855 static void 856 mkmonthb(int y, int m, int jd_flag, struct monthlines *mlines) 857 { 858 859 struct tm tm; /* for strftime printing local names of 860 * months */ 861 date dt; /* handy date */ 862 int dw; /* width of numbers */ 863 int first; /* first day of month */ 864 int firsts; /* sunday of first week of month */ 865 int i, j, k, l; /* just indices */ 866 int jan1 = 0; /* the first day of this year */ 867 int last; /* the first day of next month */ 868 char *ds; /* pointer to day strings (daystr or 869 * jdaystr) */ 870 871 /* Set ds (daystring) and dw (daywidth) according to the jd_flag */ 872 if (jd_flag) { 873 ds = jdaystr; 874 dw = 4; 875 } else { 876 ds = daystr; 877 dw = 3; 878 } 879 880 /* Set name of month centered. */ 881 memset(&tm, 0, sizeof(tm)); 882 tm.tm_mon = m; 883 wcsftime(mlines->name, sizeof(mlines->name) / sizeof(mlines->name[0]), 884 L"%OB", &tm); 885 mlines->name[0] = towupper(mlines->name[0]); 886 887 /* 888 * Set first and last to the day number of the first day of this 889 * month and the first day of next month respectively. Set jan1 to 890 * the day number of Jan 1st of this year. 891 */ 892 dt.y = y; 893 dt.m = m + 1; 894 dt.d = 1; 895 first = sndaysb(&dt); 896 if (m == 11) { 897 dt.y = y + 1; 898 dt.m = 1; 899 dt.d = 1; 900 } else { 901 dt.y = y; 902 dt.m = m + 2; 903 dt.d = 1; 904 } 905 last = sndaysb(&dt); 906 907 if (jd_flag) { 908 dt.y = y; 909 dt.m = 1; 910 dt.d = 1; 911 jan1 = sndaysb(&dt); 912 } 913 914 /* 915 * Set firsts to the day number of sunday of the first week of 916 * this month. (This might be in the last month) 917 */ 918 firsts = first - (weekday(first)+1) % 7; 919 920 /* 921 * Fill the lines with day of month or day of year (Julian day) 922 * line index: i, each line is one week. column index: j, each 923 * column is one day number. print column index: k. 924 */ 925 for (i = 0; i != 6; i++) { 926 l = 0; 927 for (j = firsts + 7 * i, k = 0; j < last && k != dw * 7; 928 j++, k += dw) { 929 if (j >= first) { 930 if (jd_flag) 931 dt.d = j - jan1 + 1; 932 else 933 sdateb(j, &dt); 934 if (j == highlightdate && !flag_nohighlight) 935 highlight(mlines->lines[i] + k, 936 ds + dt.d * dw, dw, &l); 937 else 938 memcpy(mlines->lines[i] + k + l, 939 ds + dt.d * dw, dw); 940 } else 941 memcpy(mlines->lines[i] + k + l, " ", dw); 942 } 943 if (k == 0) 944 mlines->lines[i][1] = '\0'; 945 else 946 mlines->lines[i][k + l] = '\0'; 947 mlines->extralen[i] = l; 948 } 949 } 950 951 /* Put the local names of weekdays into the wds. */ 952 static void 953 mkweekdays(struct weekdays *wds) 954 { 955 int i, len, width = 0; 956 struct tm tm; 957 wchar_t buf[20]; 958 959 memset(&tm, 0, sizeof(tm)); 960 961 for (i = 0; i != 7; i++) { 962 tm.tm_wday = (i+1) % 7; 963 wcsftime(buf, sizeof(buf)/sizeof(buf[0]), L"%a", &tm); 964 for (len = 2; len > 0; --len) { 965 if ((width = wcswidth(buf, len)) <= 2) 966 break; 967 } 968 wmemset(wds->names[i], L'\0', 4); 969 if (width == 1) 970 wds->names[i][0] = L' '; 971 wcsncat(wds->names[i], buf, len); 972 wcsncat(wds->names[i], L" ", 1); 973 } 974 } 975 976 /* 977 * Compute the day number of the first existing date after the first day in 978 * month. (the first day in month and even the month might not exist!) 979 */ 980 static int 981 firstday(int y, int m) 982 { 983 date dt; 984 int nd; 985 986 dt.y = y; 987 dt.m = m; 988 dt.d = 1; 989 nd = sndaysr(&dt); 990 for (;;) { 991 sdater(nd, &dt); 992 if ((dt.m >= m && dt.y == y) || dt.y > y) 993 return (nd); 994 else 995 nd++; 996 } 997 /* NEVER REACHED */ 998 } 999 1000 /* 1001 * Compute the number of days from date, obey the local switch from 1002 * Julian to Gregorian if specified by the user. 1003 */ 1004 static int 1005 sndaysr(struct date *d) 1006 { 1007 1008 if (nswitch != 0) 1009 if (nswitch < ndaysj(d)) 1010 return (ndaysg(d)); 1011 else 1012 return (ndaysj(d)); 1013 else 1014 return ndaysg(d); 1015 } 1016 1017 /* 1018 * Compute the number of days from date, obey the switch from 1019 * Julian to Gregorian as used by UK and her colonies. 1020 */ 1021 static int 1022 sndaysb(struct date *d) 1023 { 1024 1025 if (nswitchb < ndaysj(d)) 1026 return (ndaysg(d)); 1027 else 1028 return (ndaysj(d)); 1029 } 1030 1031 /* Inverse of sndays. */ 1032 static struct date * 1033 sdater(int nd, struct date *d) 1034 { 1035 1036 if (nswitch < nd) 1037 return (gdate(nd, d)); 1038 else 1039 return (jdate(nd, d)); 1040 } 1041 1042 /* Inverse of sndaysb. */ 1043 static struct date * 1044 sdateb(int nd, struct date *d) 1045 { 1046 1047 if (nswitchb < nd) 1048 return (gdate(nd, d)); 1049 else 1050 return (jdate(nd, d)); 1051 } 1052 1053 /* Center string t in string s of length w by putting enough leading blanks. */ 1054 static char * 1055 center(char *s, char *t, int w) 1056 { 1057 char blanks[MAX_WIDTH]; 1058 1059 memset(blanks, ' ', sizeof(blanks)); 1060 sprintf(s, "%.*s%s", (int)(w - strlen(t)) / 2, blanks, t); 1061 return (s); 1062 } 1063 1064 /* Center string t in string s of length w by putting enough leading blanks. */ 1065 static wchar_t * 1066 wcenter(wchar_t *s, wchar_t *t, int w) 1067 { 1068 char blanks[MAX_WIDTH]; 1069 1070 memset(blanks, ' ', sizeof(blanks)); 1071 swprintf(s, MAX_WIDTH, L"%.*s%ls", (int)(w - wcslen(t)) / 2, blanks, t); 1072 return (s); 1073 } 1074 1075 static int 1076 parsemonth(const char *s, int *m, int *y) 1077 { 1078 int nm, ny; 1079 char *cp; 1080 struct tm tm; 1081 1082 nm = (int)strtol(s, &cp, 10); 1083 if (cp != s) { 1084 ny = *y; 1085 if (*cp == '\0') { 1086 ; /* no special action */ 1087 } else if (*cp == 'f' || *cp == 'F') { 1088 if (nm <= *m) 1089 ny++; 1090 } else if (*cp == 'p' || *cp == 'P') { 1091 if (nm >= *m) 1092 ny--; 1093 } else 1094 return (1); 1095 if (nm < 1 || nm > 12) 1096 return 1; 1097 *m = nm; 1098 *y = ny; 1099 return (0); 1100 } 1101 if (strptime(s, "%B", &tm) != NULL || strptime(s, "%b", &tm) != NULL) { 1102 *m = tm.tm_mon + 1; 1103 return (0); 1104 } 1105 return (1); 1106 } 1107 1108 static void 1109 highlight(char *dst, char *src, int len, int *extralen) 1110 { 1111 static int first = 1; 1112 static const char *term_so, *term_se; 1113 1114 if (first) { 1115 static char cbuf[512]; 1116 char tbuf[1024], *b; 1117 1118 term_se = term_so = NULL; 1119 1120 /* On how to highlight on this type of terminal (if any). */ 1121 if (isatty(STDOUT_FILENO) && tgetent(tbuf, NULL) == 1) { 1122 b = cbuf; 1123 term_so = tgetstr("so", &b); 1124 term_se = tgetstr("se", &b); 1125 } 1126 1127 first = 0; 1128 } 1129 1130 /* 1131 * This check is not necessary, should have been handled before calling 1132 * this function. 1133 */ 1134 if (flag_nohighlight) { 1135 memcpy(dst, src, len); 1136 return; 1137 } 1138 1139 /* 1140 * If it is a real terminal, use the data from the termcap database. 1141 */ 1142 if (term_so != NULL && term_se != NULL) { 1143 /* separator. */ 1144 dst[0] = ' '; 1145 dst++; 1146 /* highlight on. */ 1147 memcpy(dst, term_so, strlen(term_so)); 1148 dst += strlen(term_so); 1149 /* the actual text. (minus leading space) */ 1150 len--; 1151 src++; 1152 memcpy(dst, src, len); 1153 dst += len; 1154 /* highlight off. */ 1155 memcpy(dst, term_se, strlen(term_se)); 1156 *extralen = strlen(term_so) + strlen(term_se); 1157 return; 1158 } 1159 1160 /* 1161 * Otherwise, print a _, backspace and the letter. 1162 */ 1163 *extralen = 0; 1164 /* skip leading space. */ 1165 src++; 1166 len--; 1167 /* separator. */ 1168 dst[0] = ' '; 1169 dst++; 1170 while (len > 0) { 1171 /* _ and backspace. */ 1172 memcpy(dst, "_\010", 2); 1173 dst += 2; 1174 *extralen += 2; 1175 /* the character. */ 1176 *dst++ = *src++; 1177 len--; 1178 } 1179 return; 1180 } 1181