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