1/*- 2 * SPDX-License-Identifier: BSD-2-Clause 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#include <calendar.h> 31#include <ctype.h> 32#include <err.h> 33#include <langinfo.h> 34#include <libgen.h> 35#include <locale.h> 36#include <stdio.h> 37#include <stdlib.h> 38#include <string.h> 39#include <sysexits.h> 40#include <time.h> 41#include <unistd.h> 42#include <wchar.h> 43#include <wctype.h> 44#include <term.h> 45#undef lines /* term.h defines this */ 46 47/* Width of one month with backward compatibility and in regular mode*/ 48#define MONTH_WIDTH_B_J 27 49#define MONTH_WIDTH_B 20 50 51#define MONTH_WIDTH_R_J 24 52#define MONTH_WIDTH_R 18 53 54#define MAX_WIDTH 64 55 56typedef struct date date; 57 58struct monthlines { 59 wchar_t name[MAX_WIDTH + 1]; 60 char lines[7][MAX_WIDTH + 1]; 61 char weeks[MAX_WIDTH + 1]; 62 unsigned int extralen[7]; 63}; 64 65struct weekdays { 66 wchar_t names[7][4]; 67}; 68 69/* The switches from Julian to Gregorian in some countries */ 70static struct djswitch { 71 const char *cc; /* Country code according to ISO 3166 */ 72 const char *nm; /* Name of country */ 73 date dt; /* Last day of Julian calendar */ 74} switches[] = { 75 {"AL", "Albania", {1912, 11, 30}}, 76 {"AT", "Austria", {1583, 10, 5}}, 77 {"AU", "Australia", {1752, 9, 2}}, 78 {"BE", "Belgium", {1582, 12, 14}}, 79 {"BG", "Bulgaria", {1916, 3, 31}}, 80 {"CA", "Canada", {1752, 9, 2}}, 81 {"CH", "Switzerland", {1655, 2, 28}}, 82 {"CN", "China", {1911, 12, 18}}, 83 {"CZ", "Czech Republic",{1584, 1, 6}}, 84 {"DE", "Germany", {1700, 2, 18}}, 85 {"DK", "Denmark", {1700, 2, 18}}, 86 {"ES", "Spain", {1582, 10, 4}}, 87 {"FI", "Finland", {1753, 2, 17}}, 88 {"FR", "France", {1582, 12, 9}}, 89 {"GB", "United Kingdom",{1752, 9, 2}}, 90 {"GR", "Greece", {1924, 3, 9}}, 91 {"HU", "Hungary", {1587, 10, 21}}, 92 {"IS", "Iceland", {1700, 11, 16}}, 93 {"IT", "Italy", {1582, 10, 4}}, 94 {"JP", "Japan", {1918, 12, 18}}, 95 {"LT", "Lithuania", {1918, 2, 1}}, 96 {"LU", "Luxembourg", {1582, 12, 14}}, 97 {"LV", "Latvia", {1918, 2, 1}}, 98 {"NL", "Netherlands", {1582, 12, 14}}, 99 {"NO", "Norway", {1700, 2, 18}}, 100 {"PL", "Poland", {1582, 10, 4}}, 101 {"PT", "Portugal", {1582, 10, 4}}, 102 {"RO", "Romania", {1919, 3, 31}}, 103 {"RU", "Russia", {1918, 1, 31}}, 104 {"SI", "Slovenia", {1919, 3, 4}}, 105 {"SE", "Sweden", {1753, 2, 17}}, 106 {"TR", "Turkey", {1926, 12, 18}}, 107 {"US", "United States", {1752, 9, 2}}, 108 {"YU", "Yugoslavia", {1919, 3, 4}} 109}; 110 111static struct djswitch *dftswitch = 112 switches + sizeof(switches) / sizeof(struct djswitch) - 2; 113 /* default switch (should be "US") */ 114 115/* Table used to print day of month and week numbers */ 116static char daystr[] = " 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15" 117 " 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31" 118 " 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47" 119 " 48 49 50 51 52 53"; 120 121/* Table used to print day of year and week numbers */ 122static char jdaystr[] = " 1 2 3 4 5 6 7 8 9" 123 " 10 11 12 13 14 15 16 17 18 19" 124 " 20 21 22 23 24 25 26 27 28 29" 125 " 30 31 32 33 34 35 36 37 38 39" 126 " 40 41 42 43 44 45 46 47 48 49" 127 " 50 51 52 53 54 55 56 57 58 59" 128 " 60 61 62 63 64 65 66 67 68 69" 129 " 70 71 72 73 74 75 76 77 78 79" 130 " 80 81 82 83 84 85 86 87 88 89" 131 " 90 91 92 93 94 95 96 97 98 99" 132 " 100 101 102 103 104 105 106 107 108 109" 133 " 110 111 112 113 114 115 116 117 118 119" 134 " 120 121 122 123 124 125 126 127 128 129" 135 " 130 131 132 133 134 135 136 137 138 139" 136 " 140 141 142 143 144 145 146 147 148 149" 137 " 150 151 152 153 154 155 156 157 158 159" 138 " 160 161 162 163 164 165 166 167 168 169" 139 " 170 171 172 173 174 175 176 177 178 179" 140 " 180 181 182 183 184 185 186 187 188 189" 141 " 190 191 192 193 194 195 196 197 198 199" 142 " 200 201 202 203 204 205 206 207 208 209" 143 " 210 211 212 213 214 215 216 217 218 219" 144 " 220 221 222 223 224 225 226 227 228 229" 145 " 230 231 232 233 234 235 236 237 238 239" 146 " 240 241 242 243 244 245 246 247 248 249" 147 " 250 251 252 253 254 255 256 257 258 259" 148 " 260 261 262 263 264 265 266 267 268 269" 149 " 270 271 272 273 274 275 276 277 278 279" 150 " 280 281 282 283 284 285 286 287 288 289" 151 " 290 291 292 293 294 295 296 297 298 299" 152 " 300 301 302 303 304 305 306 307 308 309" 153 " 310 311 312 313 314 315 316 317 318 319" 154 " 320 321 322 323 324 325 326 327 328 329" 155 " 330 331 332 333 334 335 336 337 338 339" 156 " 340 341 342 343 344 345 346 347 348 349" 157 " 350 351 352 353 354 355 356 357 358 359" 158 " 360 361 362 363 364 365 366"; 159 160static int flag_nohighlight; /* user doesn't want a highlighted today */ 161static int flag_weeks; /* user wants number of week */ 162static int nswitch; /* user defined switch date */ 163static int nswitchb; /* switch date for backward compatibility */ 164static int highlightdate; 165 166static char *center(char *s, char *t, int w); 167static wchar_t *wcenter(wchar_t *s, wchar_t *t, int w); 168static int firstday(int y, int m); 169static void highlight(char *dst, char *src, int len, int *extraletters); 170static void mkmonthr(int year, int month, int jd_flag, 171 struct monthlines * monthl); 172static void mkmonthb(int year, int month, int jd_flag, 173 struct monthlines * monthl); 174static void mkweekdays(struct weekdays * wds); 175static void monthranger(int year, int m, int jd_flag, 176 int before, int after); 177static void monthrangeb(int year, int m, int jd_flag, 178 int before, int after); 179static int parsemonth(const char *s, int *m, int *y); 180static void printcc(void); 181static void printeaster(int year, int julian, int orthodox); 182static date *sdater(int ndays, struct date * d); 183static date *sdateb(int ndays, struct date * d); 184static int sndaysr(struct date * d); 185static int sndaysb(struct date * d); 186static void usage(void); 187 188int 189main(int argc, char *argv[]) 190{ 191 struct djswitch *p, *q; /* to search user defined switch date */ 192 date never = {10000, 1, 1}; /* outside valid range of dates */ 193 date ukswitch = {1752, 9, 2};/* switch date for Great Britain */ 194 date dt; 195 int ch; /* holds the option character */ 196 int m = 0; /* month */ 197 int y = 0; /* year */ 198 int flag_backward = 0; /* user called cal--backward compat. */ 199 int flag_wholeyear = 0; /* user wants the whole year */ 200 int flag_julian_cal = 0; /* user wants Julian Calendar */ 201 int flag_julian_day = 0; /* user wants the Julian day numbers */ 202 int flag_orthodox = 0; /* user wants Orthodox easter */ 203 int flag_easter = 0; /* user wants easter date */ 204 int flag_3months = 0; /* user wants 3 month display (-3) */ 205 int flag_after = 0; /* user wants to see months after */ 206 int flag_before = 0; /* user wants to see months before */ 207 int flag_specifiedmonth = 0;/* user wants to see this month (-m) */ 208 int flag_givenmonth = 0; /* user has specified month [n] */ 209 int flag_givenyear = 0; /* user has specified year [n] */ 210 char *cp; /* character pointer */ 211 char *flag_today = NULL; /* debug: use date as being today */ 212 char *flag_month = NULL; /* requested month as string */ 213 char *flag_highlightdate = NULL; /* debug: date to highlight */ 214 int before, after; 215 const char *locale; /* locale to get country code */ 216 217 flag_nohighlight = 0; 218 flag_weeks = 0; 219 220 /* 221 * Use locale to determine the country code, 222 * and use the country code to determine the default 223 * switchdate and date format from the switches table. 224 */ 225 if (setlocale(LC_ALL, "") == NULL) 226 warn("setlocale"); 227 locale = setlocale(LC_TIME, NULL); 228 if (locale == NULL || 229 strcmp(locale, "C") == 0 || 230 strcmp(locale, "POSIX") == 0 || 231 strcmp(locale, "ASCII") == 0 || 232 strcmp(locale, "US-ASCII") == 0) 233 locale = "_US"; 234 q = switches + sizeof(switches) / sizeof(struct djswitch); 235 for (p = switches; p != q; p++) 236 if ((cp = strstr(locale, p->cc)) != NULL && *(cp - 1) == '_') 237 break; 238 if (p == q) { 239 nswitch = ndaysj(&dftswitch->dt); 240 } else { 241 nswitch = ndaysj(&p->dt); 242 dftswitch = p; 243 } 244 245 246 /* 247 * Get the filename portion of argv[0] and set flag_backward if 248 * this program is called "cal". 249 */ 250 if (strncmp(basename(argv[0]), "cal", strlen("cal")) == 0) 251 flag_backward = 1; 252 253 /* Set the switch date to United Kingdom if backwards compatible */ 254 if (flag_backward) 255 nswitchb = ndaysj(&ukswitch); 256 257 before = after = -1; 258 259 while ((ch = getopt(argc, argv, "3A:B:Cd:eH:hjJm:Nops:wy")) != -1) 260 switch (ch) { 261 case '3': 262 flag_3months = 1; 263 break; 264 case 'A': 265 if (flag_after > 0) 266 errx(EX_USAGE, "Double -A specified"); 267 flag_after = strtol(optarg, NULL, 10); 268 if (flag_after <= 0) 269 errx(EX_USAGE, 270 "Argument to -A must be positive"); 271 break; 272 case 'B': 273 if (flag_before > 0) 274 errx(EX_USAGE, "Double -B specified"); 275 flag_before = strtol(optarg, NULL, 10); 276 if (flag_before <= 0) 277 errx(EX_USAGE, 278 "Argument to -B must be positive"); 279 break; 280 case 'J': 281 if (flag_backward) 282 usage(); 283 nswitch = ndaysj(&never); 284 flag_julian_cal = 1; 285 break; 286 case 'C': 287 flag_backward = 1; 288 break; 289 case 'N': 290 flag_backward = 0; 291 break; 292 case 'd': 293 flag_today = optarg; 294 break; 295 case 'H': 296 flag_highlightdate = optarg; 297 break; 298 case 'h': 299 flag_nohighlight = 1; 300 break; 301 case 'e': 302 if (flag_backward) 303 usage(); 304 flag_easter = 1; 305 break; 306 case 'j': 307 flag_julian_day = 1; 308 break; 309 case 'm': 310 if (flag_specifiedmonth) 311 errx(EX_USAGE, "Double -m specified"); 312 flag_month = optarg; 313 flag_specifiedmonth = 1; 314 break; 315 case 'o': 316 if (flag_backward) 317 usage(); 318 flag_orthodox = 1; 319 flag_easter = 1; 320 break; 321 case 'p': 322 if (flag_backward) 323 usage(); 324 printcc(); 325 return (0); 326 break; 327 case 's': 328 if (flag_backward) 329 usage(); 330 q = switches + 331 sizeof(switches) / sizeof(struct djswitch); 332 for (p = switches; 333 p != q && strcmp(p->cc, optarg) != 0; p++) 334 ; 335 if (p == q) 336 errx(EX_USAGE, 337 "%s: invalid country code", optarg); 338 nswitch = ndaysj(&(p->dt)); 339 break; 340 case 'w': 341 if (flag_backward) 342 usage(); 343 flag_weeks = 1; 344 break; 345 case 'y': 346 flag_wholeyear = 1; 347 break; 348 default: 349 usage(); 350 } 351 352 argc -= optind; 353 argv += optind; 354 355 switch (argc) { 356 case 2: 357 if (flag_easter) 358 usage(); 359 flag_month = *argv++; 360 flag_givenmonth = 1; 361 m = strtol(flag_month, NULL, 10); 362 /* FALLTHROUGH */ 363 case 1: 364 y = atoi(*argv); 365 if (y < 1 || y > 9999) 366 errx(EX_USAGE, "year `%s' not in range 1..9999", *argv); 367 argv++; 368 flag_givenyear = 1; 369 break; 370 case 0: 371 if (flag_today != NULL) { 372 y = strtol(flag_today, NULL, 10); 373 m = strtol(flag_today + 5, NULL, 10); 374 } else { 375 time_t t; 376 struct tm *tm; 377 378 t = time(NULL); 379 tm = localtime(&t); 380 y = tm->tm_year + 1900; 381 m = tm->tm_mon + 1; 382 } 383 break; 384 default: 385 usage(); 386 } 387 388 if (flag_month != NULL) { 389 if (parsemonth(flag_month, &m, &y)) { 390 errx(EX_USAGE, 391 "%s is neither a month number (1..12) nor a name", 392 flag_month); 393 } 394 } 395 396 /* 397 * What is not supported: 398 * -3 with -A or -B 399 * -3 displays 3 months, -A and -B change that behaviour. 400 * -3 with -y 401 * -3 displays 3 months, -y says display a whole year. 402 * -3 with a given year but no given month or without -m 403 * -3 displays 3 months, no month specified doesn't make clear 404 * which three months. 405 * -m with a given month 406 * conflicting arguments, both specify the same field. 407 * -y with -m 408 * -y displays the whole year, -m displays a single month. 409 * -y with a given month 410 * -y displays the whole year, the given month displays a single 411 * month. 412 * -y with -A or -B 413 * -y displays the whole year, -A and -B display extra months. 414 */ 415 416 /* -3 together with -A or -B. */ 417 if (flag_3months && (flag_after || flag_before)) 418 errx(EX_USAGE, "-3 together with -A and -B is not supported."); 419 /* -3 together with -y. */ 420 if (flag_3months && flag_wholeyear) 421 errx(EX_USAGE, "-3 together with -y is not supported."); 422 /* -3 together with givenyear but no givenmonth. */ 423 if (flag_3months && flag_givenyear && 424 !(flag_givenmonth || flag_specifiedmonth)) 425 errx(EX_USAGE, 426 "-3 together with a given year but no given month is " 427 "not supported."); 428 /* -m together with xx xxxx. */ 429 if (flag_specifiedmonth && flag_givenmonth) 430 errx(EX_USAGE, 431 "-m together with a given month is not supported."); 432 /* -y together with -m. */ 433 if (flag_wholeyear && flag_specifiedmonth) 434 errx(EX_USAGE, "-y together with -m is not supported."); 435 /* -y together with xx xxxx. */ 436 if (flag_wholeyear && flag_givenmonth) 437 errx(EX_USAGE, "-y together a given month is not supported."); 438 /* -y together with -A or -B. */ 439 if (flag_wholeyear && (flag_before > 0 || flag_after > 0)) 440 errx(EX_USAGE, "-y together a -A or -B is not supported."); 441 /* The rest should be fine. */ 442 443 /* Select the period to display, in order of increasing priority .*/ 444 if (flag_wholeyear || 445 (flag_givenyear && !(flag_givenmonth || flag_specifiedmonth))) { 446 m = 1; 447 before = 0; 448 after = 11; 449 } 450 if (flag_givenyear && flag_givenmonth) { 451 before = 0; 452 after = 0; 453 } 454 if (flag_specifiedmonth) { 455 before = 0; 456 after = 0; 457 } 458 if (flag_before) { 459 before = flag_before; 460 } 461 if (flag_after) { 462 after = flag_after; 463 } 464 if (flag_3months) { 465 before = 1; 466 after = 1; 467 } 468 if (after == -1) 469 after = 0; 470 if (before == -1) 471 before = 0; 472 473 /* Highlight a specified day or today .*/ 474 if (flag_highlightdate != NULL) { 475 dt.y = strtol(flag_highlightdate, NULL, 10); 476 dt.m = strtol(flag_highlightdate + 5, NULL, 10); 477 dt.d = strtol(flag_highlightdate + 8, NULL, 10); 478 } else { 479 time_t t; 480 struct tm *tm1; 481 482 t = time(NULL); 483 tm1 = localtime(&t); 484 dt.y = tm1->tm_year + 1900; 485 dt.m = tm1->tm_mon + 1; 486 dt.d = tm1->tm_mday; 487 } 488 highlightdate = sndaysb(&dt); 489 490 /* And now we finally start to calculate and output calendars. */ 491 if (flag_easter) 492 printeaster(y, flag_julian_cal, flag_orthodox); 493 else 494 if (flag_backward) 495 monthrangeb(y, m, flag_julian_day, before, after); 496 else 497 monthranger(y, m, flag_julian_day, before, after); 498 if (ferror(stdout) != 0 || fflush(stdout) != 0) 499 err(1, "stdout"); 500 return (0); 501} 502 503static void 504usage(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. */ 519static void 520printcc(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. */ 540static void 541printeaster(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 ]. */ 585static void 586monthrangeb(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 675static void 676monthranger(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 763static void 764mkmonthr(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 854static void 855mkmonthb(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 && isatty(STDOUT_FILENO)) 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. */ 952static void 953mkweekdays(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 */ 980static int 981firstday(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 */ 1004static int 1005sndaysr(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 */ 1021static int 1022sndaysb(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. */ 1032static struct date * 1033sdater(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. */ 1043static struct date * 1044sdateb(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. */ 1054static char * 1055center(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. */ 1065static wchar_t * 1066wcenter(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 1075static int 1076parsemonth(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 1108static void 1109highlight(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