1 /*
2 * Copyright (c) 1989, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Kim Letkeman.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37 /* 1999-02-01 Jean-Francois Bignolles: added option '-m' to display
38 * monday as the first day of the week.
39 * 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
40 * - added Native Language Support
41 *
42 * 2000-09-01 Michael Charles Pruznick <dummy@netwiz.net>
43 * Added "-3" option to print prev/next month with current.
44 * Added overridable default MONTHS_IN_ROW and "-1" option to
45 * get traditional output when -3 is the default. I hope that
46 * enough people will like -3 as the default that one day the
47 * product can be shipped that way.
48 *
49 * 2001-05-07 Pablo Saratxaga <pablo@mandrakesoft.com>
50 * Fixed the bugs with multi-byte charset (zg: cjk, utf-8)
51 * displaying. made the 'month year' ("%s %d") header translatable
52 * so it can be adapted to conventions used by different languages
53 * added support to read "first_weekday" locale information
54 * still to do: support for 'cal_direction' (will require a major
55 * rewrite of the displaying) and proper handling of RTL scripts
56 */
57
58 #include <sys/types.h>
59
60 #include <ctype.h>
61 #include <getopt.h>
62 #include <stdint.h>
63 #include <stdio.h>
64 #include <stdlib.h>
65 #include <string.h>
66 #include <time.h>
67 #include <unistd.h>
68 #include <errno.h>
69
70 #include "c.h"
71 #include "closestream.h"
72 #include "colors.h"
73 #include "nls.h"
74 #include "mbsalign.h"
75 #include "strutils.h"
76 #include "optutils.h"
77 #include "timeutils.h"
78 #include "ttyutils.h"
79 #include "xalloc.h"
80
81 #define DOY_MONTH_WIDTH 27 /* -j month width */
82 #define DOM_MONTH_WIDTH 20 /* month width */
83
84 enum {
85 CAL_COLOR_TODAY,
86 CAL_COLOR_HEADER,
87 CAL_COLOR_WEEKNUMBER,
88 CAL_COLOR_WORKDAY,
89 CAL_COLOR_WEEKEND
90 };
91
92 static const struct { const char * const scheme; const char * dflt; } colors[] =
93 {
94 [CAL_COLOR_TODAY] = { "today", UL_COLOR_REVERSE },
95 [CAL_COLOR_WEEKNUMBER] = { "weeknumber", UL_COLOR_REVERSE },
96 [CAL_COLOR_HEADER] = { "header", "" },
97 [CAL_COLOR_WORKDAY] = { "workday", "" },
98 [CAL_COLOR_WEEKEND] = { "weekend", "" }
99 };
100
101 static inline void cal_enable_color(int id)
102 {
103 color_scheme_enable(colors[id].scheme, colors[id].dflt);
104 }
105
106 static inline const char *cal_get_color_sequence(int id)
107 {
108 return color_scheme_get_sequence(colors[id].scheme, colors[id].dflt);
109 }
110
111 static inline void cal_disable_color(int id)
112 {
113 const char *seq = cal_get_color_sequence(id);
114 if (seq && seq[0])
115 color_disable();
116 }
117
118 static inline const char *cal_get_color_disable_sequence(int id)
119 {
120 const char *seq = cal_get_color_sequence(id);
121 if (seq && seq[0])
122 return UL_COLOR_RESET;
123 else
124 return "";
125 }
126
127 #include "widechar.h"
128
129 enum {
130 GREGORIAN = INT32_MIN,
131 ISO = INT32_MIN,
132 GB1752 = 1752,
133 DEFAULT_REFORM_YEAR = 1752,
134 JULIAN = INT32_MAX
135 };
136
137 enum {
138 SUNDAY = 0,
139 MONDAY,
140 TUESDAY,
141 WEDNESDAY,
142 THURSDAY,
143 FRIDAY,
144 SATURDAY,
145 DAYS_IN_WEEK,
146 NONEDAY
147 };
148
149 enum {
150 JANUARY = 1,
151 FEBRUARY,
152 MARCH,
153 APRIL,
154 MAY,
155 JUNE,
156 JULY,
157 AUGUST,
158 SEPTEMBER,
159 OCTOBER,
160 NOVEMBER,
161 DECEMBER
162 };
163
164 #define REFORMATION_MONTH SEPTEMBER
165 #define NUMBER_MISSING_DAYS 11 /* 11 day correction */
166 #define YDAY_AFTER_MISSING 258 /* 14th in Sep 1752 */
167
168 #define MONTHS_IN_YEAR DECEMBER
169 #define DAYS_IN_MONTH 31
170 #define MAXDAYS 42 /* slots in a month array */
171 #define SPACE -1 /* used in day array */
172
173 #define SMALLEST_YEAR 1
174
175 #define DAY_LEN 3 /* 3 spaces per day */
176 #define WEEK_LEN (DAYS_IN_WEEK * DAY_LEN)
177 #define MONTHS_IN_YEAR_ROW 3 /* month columns in year view */
178 #define WNUM_LEN 3
179
180 #define FMT_ST_CHARS 300 /* 90 suffices in most locales */
181
182 static const int days_in_month[2][13] = {
183 {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
184 {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
185 };
186
187 enum {
188 WEEK_NUM_DISABLED = 0,
189 WEEK_NUM_MASK=0xff,
190 WEEK_NUM_ISO=0x100,
191 WEEK_NUM_US=0x200,
192 };
193
194 enum {
195 COLUMNS_MAX_THREE = -1,
196 COLUMNS_AUTO = -2,
197 };
198
199 /* utf-8 can have up to 6 bytes per char; and an extra byte for ending \0 */
200 static char day_headings[(WEEK_LEN + 1) * 6 + 1];
201
202 struct cal_request {
203 int day;
204 int month;
205 int32_t year;
206 int week;
207 int start_month;
208 };
209
210 struct cal_control {
211 const char *full_month[MONTHS_IN_YEAR]; /* month names */
212 const char *abbr_month[MONTHS_IN_YEAR]; /* abbreviated month names */
213 const char *weekdays[DAYS_IN_WEEK]; /* day names */
214
215 int reform_year; /* Gregorian reform year */
216 int colormode; /* day and week number highlight */
217 int num_months; /* number of requested months */
218 int span_months; /* span the date */
219 int months_in_row; /* number of months horizontally in print out */
220 int weekstart; /* day the week starts, often Sun or Mon */
221 int weektype; /* WEEK_TYPE_{NONE,ISO,US} */
222 size_t day_width; /* day width in characters in printout */
223 size_t week_width; /* 7 * day_width + possible week num */
224 size_t month_width; /* width of a month (vertical mode) */
225 int gutter_width; /* spaces in between horizontal month outputs */
226 struct cal_request req; /* the times user is interested */
227 unsigned int julian:1, /* julian output */
228 header_year:1, /* print year number */
229 header_hint:1, /* does month name + year need two lines to fit */
230 vertical:1; /* display the output in vertical */
231 };
232
233 struct cal_month {
234 int days[MAXDAYS]; /* the day numbers, or SPACE */
235 int weeks[MAXDAYS / DAYS_IN_WEEK];
236 int month;
237 int32_t year;
238 struct cal_month *next;
239 };
240 /* function prototypes */
241 static int leap_year(const struct cal_control *ctl, int32_t year);
242 static int monthname_to_number(struct cal_control *ctl, const char *name);
243 static void weekdays_init(struct cal_control *ctl);
244 static void headers_init(struct cal_control *ctl);
245 static void cal_fill_month(struct cal_month *month, const struct cal_control *ctl);
246 static void cal_output_header(struct cal_month *month, const struct cal_control *ctl);
247 static void cal_output_months(struct cal_month *month, const struct cal_control *ctl);
248 static void cal_vert_output_months(struct cal_month *month, const struct cal_control *ctl);
249 static void monthly(const struct cal_control *ctl);
250 static void yearly(const struct cal_control *ctl);
251 static int day_in_year(const struct cal_control *ctl, int day,
252 int month, int32_t year);
253 static int day_in_week(const struct cal_control *ctl, int day,
254 int month, int32_t year);
255 static int week_number(int day, int month, int32_t year, const struct cal_control *ctl);
256 static int week_to_day(const struct cal_control *ctl);
257 static int center_str(const char *src, char *dest, size_t dest_size, size_t width);
258 static void center(const char *str, size_t len, int separate);
259 static int left_str(const char *src, char *dest, size_t dest_size, size_t width);
260 static void left(const char *str, size_t len, int separate);
261 static int parse_reform_year(const char *reform_year);
262 static void __attribute__((__noreturn__)) usage(void);
263
264 #ifdef TEST_CAL
265 static time_t cal_time(time_t *t)
266 {
267 char *str = getenv("CAL_TEST_TIME");
268
269 if (str) {
270 uint64_t x = strtou64_or_err(str, "failed to parse CAL_TEST_TIME");
271
272 *t = x;
273 return *t;
274 }
275
276 return time(t);
277 }
278 #else
279 # define cal_time(t) time(t)
280 #endif
281
282 int main(int argc, char **argv)
283 {
284 struct tm local_time;
285 time_t now;
286 int ch = 0, yflag = 0, Yflag = 0, cols = COLUMNS_MAX_THREE;
287
288 static struct cal_control ctl = {
289 .reform_year = DEFAULT_REFORM_YEAR,
290 .weekstart = SUNDAY,
291 .span_months = 0,
292 .colormode = UL_COLORMODE_UNDEF,
293 .weektype = WEEK_NUM_DISABLED,
294 .day_width = DAY_LEN,
295 .gutter_width = 2,
296 .req.day = 0,
297 .req.month = 0
298 };
299
300 enum {
301 OPT_COLOR = CHAR_MAX + 1,
302 OPT_ISO,
303 OPT_REFORM
304 };
305
306 static const struct option longopts[] = {
307 {"one", no_argument, NULL, '1'},
308 {"three", no_argument, NULL, '3'},
309 {"sunday", no_argument, NULL, 's'},
310 {"monday", no_argument, NULL, 'm'},
311 {"julian", no_argument, NULL, 'j'},
312 {"months", required_argument, NULL, 'n'},
313 {"span", no_argument, NULL, 'S'},
314 {"year", no_argument, NULL, 'y'},
315 {"week", optional_argument, NULL, 'w'},
316 {"color", optional_argument, NULL, OPT_COLOR},
317 {"reform", required_argument, NULL, OPT_REFORM},
318 {"iso", no_argument, NULL, OPT_ISO},
319 {"version", no_argument, NULL, 'V'},
320 {"twelve", no_argument, NULL, 'Y'},
321 {"help", no_argument, NULL, 'h'},
322 {"vertical", no_argument, NULL,'v'},
323 {"column", required_argument, NULL,'c'},
324 {NULL, 0, NULL, 0}
325 };
326
327 static const ul_excl_t excl[] = { /* rows and cols in ASCII order */
328 { 'Y','n','y' },
329 { 0 }
330 };
331 int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
332
333 setlocale(LC_ALL, "");
334 bindtextdomain(PACKAGE, LOCALEDIR);
335 textdomain(PACKAGE);
336 close_stdout_atexit();
337
338 /*
339 * The traditional Unix cal utility starts the week at Sunday,
340 * while ISO 8601 starts at Monday. We read the start day from
341 * the locale database, which can be overridden with the
342 * -s (Sunday) or -m (Monday) options.
343 */
344 #if HAVE_DECL__NL_TIME_WEEK_1STDAY
345 /*
346 * You need to use 2 locale variables to get the first day of the week.
347 * This is needed to support first_weekday=2 and first_workday=1 for
348 * the rare case where working days span across 2 weeks.
349 * This shell script shows the combinations and calculations involved:
350 *
351 * for LANG in en_US ru_RU fr_FR csb_PL POSIX; do
352 * printf "%s:\t%s + %s -1 = " $LANG $(locale week-1stday first_weekday)
353 * date -d"$(locale week-1stday) +$(($(locale first_weekday)-1))day" +%w
354 * done
355 *
356 * en_US: 19971130 + 1 -1 = 0 #0 = sunday
357 * ru_RU: 19971130 + 2 -1 = 1
358 * fr_FR: 19971201 + 1 -1 = 1
359 * csb_PL: 19971201 + 2 -1 = 2
360 * POSIX: 19971201 + 7 -1 = 0
361 */
362 {
363 int wfd;
364 union { unsigned int word; char *string; } val;
365 val.string = nl_langinfo(_NL_TIME_WEEK_1STDAY);
366
367 wfd = val.word;
368 wfd = day_in_week(&ctl, wfd % 100, (wfd / 100) % 100,
369 wfd / (100 * 100));
370 ctl.weekstart = (wfd + *nl_langinfo(_NL_TIME_FIRST_WEEKDAY) - 1) % DAYS_IN_WEEK;
371 }
372 #endif
373 while ((ch = getopt_long(argc, argv, "13mjn:sSywYvc:Vh", longopts, NULL)) != -1) {
374
375 err_exclusive_options(ch, longopts, excl, excl_st);
376
377 switch(ch) {
378 case '1':
379 ctl.num_months = 1;
380 break;
381 case '3':
382 ctl.num_months = 3;
383 ctl.span_months = 1;
384 break;
385 case 's':
386 ctl.weekstart = SUNDAY; /* default */
387 break;
388 case 'm':
389 ctl.weekstart = MONDAY;
390 break;
391 case 'j':
392 ctl.julian = 1;
393 ctl.day_width = DAY_LEN + 1;
394 break;
395 case 'y':
396 yflag = 1;
397 break;
398 case 'Y':
399 Yflag = 1;
400 break;
401 case 'n':
402 ctl.num_months = strtou32_or_err(optarg,
403 _("invalid month argument"));
404 break;
405 case 'S':
406 ctl.span_months = 1;
407 break;
408 case 'w':
409 if (optarg) {
410 ctl.req.week = strtos32_or_err(optarg,
411 _("invalid week argument"));
412 if (ctl.req.week < 1 || 54 < ctl.req.week)
413 errx(EXIT_FAILURE,_("illegal week value: use 1-54"));
414 }
415 ctl.weektype = WEEK_NUM_US; /* default per weekstart */
416 break;
417 case OPT_COLOR:
418 ctl.colormode = UL_COLORMODE_AUTO;
419 if (optarg)
420 ctl.colormode = colormode_or_err(optarg,
421 _("unsupported color mode"));
422 break;
423 case OPT_REFORM:
424 ctl.reform_year = parse_reform_year(optarg);
425 break;
426 case OPT_ISO:
427 ctl.reform_year = ISO;
428 break;
429 case 'v':
430 ctl.vertical = 1;
431 break;
432 case 'c':
433 if (strcmp(optarg, "auto") == 0)
434 cols = COLUMNS_AUTO;
435 else
436 cols = strtosize_or_err(optarg, "foo");
437 break;
438 case 'V':
439 print_version(EXIT_SUCCESS);
440 case 'h':
441 usage();
442 default:
443 errtryhelp(EXIT_FAILURE);
444 }
445 }
446
447 argc -= optind;
448 argv += optind;
449
450 if (ctl.weektype) {
451 ctl.weektype = ctl.req.week & WEEK_NUM_MASK;
452 ctl.weektype |= (ctl.weekstart == MONDAY ? WEEK_NUM_ISO : WEEK_NUM_US);
453 ctl.week_width = (ctl.day_width * DAYS_IN_WEEK) + WNUM_LEN;
454 } else
455 ctl.week_width = ctl.day_width * DAYS_IN_WEEK;
456 /*
457 * The day_width includes the space between days,
458 * as there is no leading space, remove 1
459 * */
460 ctl.week_width -= 1;
461
462 if (argc == 1 && !isdigit_string(*argv)) {
463 usec_t x;
464 /* cal <timestamp> */
465 if (parse_timestamp(*argv, &x) == 0)
466 now = (time_t) (x / 1000000);
467 /* cal <monthname> */
468 else if ((ctl.req.month = monthname_to_number(&ctl, *argv)) > 0)
469 cal_time(&now); /* this year */
470 else
471 errx(EXIT_FAILURE, _("failed to parse timestamp or unknown month name: %s"), *argv);
472 argc = 0;
473 } else
474 cal_time(&now);
475
476 localtime_r(&now, &local_time);
477
478 switch(argc) {
479 case 3:
480 ctl.req.day = strtos32_or_err(*argv++, _("illegal day value"));
481 if (ctl.req.day < 1 || DAYS_IN_MONTH < ctl.req.day)
482 errx(EXIT_FAILURE, _("illegal day value: use 1-%d"), DAYS_IN_MONTH);
483 /* fallthrough */
484 case 2:
485 if (isdigit(**argv))
486 ctl.req.month = strtos32_or_err(*argv++, _("illegal month value: use 1-12"));
487 else {
488 ctl.req.month = monthname_to_number(&ctl, *argv);
489 if (ctl.req.month < 0)
490 errx(EXIT_FAILURE, _("unknown month name: %s"), *argv);
491 argv++;
492 }
493 if (ctl.req.month < 1 || MONTHS_IN_YEAR < ctl.req.month)
494 errx(EXIT_FAILURE, _("illegal month value: use 1-12"));
495 /* fallthrough */
496 case 1:
497 ctl.req.year = strtos32_or_err(*argv++, _("illegal year value"));
498 if (ctl.req.year < SMALLEST_YEAR)
499 errx(EXIT_FAILURE, _("illegal year value: use positive integer"));
500 if (ctl.req.year == JULIAN)
501 errx(EXIT_FAILURE, _("illegal year value"));
502 if (ctl.req.day) {
503 int dm = days_in_month[leap_year(&ctl, ctl.req.year)]
504 [ctl.req.month];
505 if (ctl.req.day > dm)
506 errx(EXIT_FAILURE, _("illegal day value: use 1-%d"), dm);
507 ctl.req.day = day_in_year(&ctl, ctl.req.day,
508 ctl.req.month, ctl.req.year);
509 } else if ((int32_t) (local_time.tm_year + 1900) == ctl.req.year) {
510 ctl.req.day = local_time.tm_yday + 1;
511 }
512 if (!ctl.req.month && !ctl.req.week) {
513 ctl.req.month = local_time.tm_mon + 1;
514 if (!ctl.num_months)
515 yflag = 1;
516 }
517 break;
518 case 0:
519 ctl.req.day = local_time.tm_yday + 1;
520 ctl.req.year = local_time.tm_year + 1900;
521 if (!ctl.req.month)
522 ctl.req.month = local_time.tm_mon + 1;
523 break;
524 default:
525 warnx(_("bad usage"));
526 errtryhelp(EXIT_FAILURE);
527 }
528
529 if (0 < ctl.req.week) {
530 int yday = week_to_day(&ctl);
531 int leap = leap_year(&ctl, ctl.req.year);
532 int m = 1;
533
534 if (yday < 1)
535 errx(EXIT_FAILURE, _("illegal week value: year %d "
536 "doesn't have week %d"),
537 ctl.req.year, ctl.req.week);
538 while (m <= DECEMBER && yday > days_in_month[leap][m])
539 yday -= days_in_month[leap][m++];
540 if (DECEMBER < m && ctl.weektype & WEEK_NUM_ISO) {
541 /* In some years (e.g. 2010 in ISO mode) it's possible
542 * to have a remnant of week 53 starting the year yet
543 * the year in question ends during 52, in this case
544 * we're assuming that early remnant is being referred
545 * to if 53 is given as argument. */
546 if (ctl.req.week != week_number(31, DECEMBER, ctl.req.year - 1, &ctl))
547 errx(EXIT_FAILURE,
548 _("illegal week value: year %d "
549 "doesn't have week %d"),
550 ctl.req.year, ctl.req.week);
551 }
552 if (!ctl.req.month)
553 ctl.req.month = MONTHS_IN_YEAR < m ? 1 : m;
554 }
555
556 weekdays_init(&ctl);
557 headers_init(&ctl);
558
559 if (colors_init(ctl.colormode, "cal") == 0) {
560 /* disable */
561 ctl.req.day = 0;
562 ctl.weektype &= ~WEEK_NUM_MASK;
563 }
564
565 if (yflag || Yflag) {
566 ctl.gutter_width = 3;
567 if (!ctl.num_months)
568 ctl.num_months = MONTHS_IN_YEAR;
569 if (yflag) {
570 ctl.req.start_month = 1; /* start from Jan */
571 ctl.header_year = 1; /* print year number */
572 }
573 }
574
575 if (ctl.vertical)
576 ctl.gutter_width = 1;
577
578 if (ctl.num_months > 1 && ctl.months_in_row == 0) {
579 ctl.months_in_row = MONTHS_IN_YEAR_ROW; /* default */
580
581 if (cols > 0)
582 ctl.months_in_row = cols;
583 else if (isatty(STDOUT_FILENO)) {
584 int w, mw, extra, new_n;
585
586 w = get_terminal_width(80);
587 mw = ctl.julian ? DOY_MONTH_WIDTH : DOM_MONTH_WIDTH;
588
589 if (w < mw)
590 w = mw;
591
592 extra = ((w / mw) - 1) * ctl.gutter_width;
593 new_n = (w - extra) / mw;
594
595 switch (cols) {
596 case COLUMNS_MAX_THREE:
597 if (new_n < MONTHS_IN_YEAR_ROW)
598 ctl.months_in_row = new_n > 0 ? new_n : 1;
599 break;
600 case COLUMNS_AUTO:
601 ctl.months_in_row = new_n > 0 ? new_n : 1;
602 break;
603 }
604 }
605 } else if (!ctl.months_in_row)
606 ctl.months_in_row = 1;
607
608 if (!ctl.num_months)
609 ctl.num_months = 1; /* display at least one month */
610
611 if (yflag || Yflag)
612 yearly(&ctl);
613 else
614 monthly(&ctl);
615
616 return EXIT_SUCCESS;
617 }
618
619 /* leap year -- account for gregorian reformation in 1752 */
620 static int leap_year(const struct cal_control *ctl, int32_t year)
621 {
622 if (year <= ctl->reform_year)
623 return !(year % 4);
624
625 return ( !(year % 4) && (year % 100) ) || !(year % 400);
626 }
627
628 static void init_monthnames(struct cal_control *ctl)
629 {
630 size_t i;
631
632 if (ctl->full_month[0] != NULL)
633 return; /* already initialized */
634
635 for (i = 0; i < MONTHS_IN_YEAR; i++)
636 ctl->full_month[i] = nl_langinfo(ALTMON_1 + i);
637 }
638
639 static void init_abbr_monthnames(struct cal_control *ctl)
640 {
641 size_t i;
642
643 if (ctl->abbr_month[0] != NULL)
644 return; /* already initialized */
645
646 for (i = 0; i < MONTHS_IN_YEAR; i++)
647 ctl->abbr_month[i] = nl_langinfo(_NL_ABALTMON_1 + i);
648 }
649
650 static int monthname_to_number(struct cal_control *ctl, const char *name)
651 {
652 size_t i;
653
654 init_monthnames(ctl);
655 for (i = 0; i < MONTHS_IN_YEAR; i++)
656 if (strcasecmp(ctl->full_month[i], name) == 0)
657 return i + 1;
658
659 init_abbr_monthnames(ctl);
660 for (i = 0; i < MONTHS_IN_YEAR; i++)
661 if (strcasecmp(ctl->abbr_month[i], name) == 0)
662 return i + 1;
663
664 return -EINVAL;
665 }
666
667 static void weekdays_init(struct cal_control *ctl)
668 {
669 size_t wd;
670 int i;
671
672 for (i = 0; i < DAYS_IN_WEEK; i++) {
673 wd = (i + ctl->weekstart) % DAYS_IN_WEEK;
674 ctl->weekdays[i] = nl_langinfo(ABDAY_1 + wd);
675 }
676 }
677 static void headers_init(struct cal_control *ctl)
678 {
679 size_t i;
680 char *cur_dh = day_headings;
681 char tmp[FMT_ST_CHARS];
682 int year_len;
683
684 year_len = snprintf(tmp, sizeof(tmp), "%04d", ctl->req.year);
685
686 if (year_len < 0 || (size_t)year_len >= sizeof(tmp)) {
687 /* XXX impossible error */
688 return;
689 }
690
691 for (i = 0; i < DAYS_IN_WEEK; i++) {
692 size_t space_left;
693
694 if (i)
695 strcat(cur_dh++, " ");
696 space_left = sizeof(day_headings) - (cur_dh - day_headings);
697
698 if (space_left <= (ctl->day_width - 1))
699 break;
700 cur_dh += center_str(ctl->weekdays[i], cur_dh,
701 space_left, ctl->day_width - 1);
702 }
703
704 init_monthnames(ctl);
705
706 for (i = 0; i < MONTHS_IN_YEAR; i++) {
707 /* The +1 after year_len is space in between month and year. */
708 if (ctl->week_width < strlen(ctl->full_month[i]) + year_len)
709 ctl->header_hint = 1;
710 }
711 }
712
713 static void cal_fill_month(struct cal_month *month, const struct cal_control *ctl)
714 {
715 int first_week_day = day_in_week(ctl, 1, month->month, month->year);
716 int month_days;
717 int i, j, weeklines = 0;
718
719 if (ctl->julian)
720 j = day_in_year(ctl, 1, month->month, month->year);
721 else
722 j = 1;
723 month_days = j + days_in_month[leap_year(ctl, month->year)][month->month];
724
725 /* True when Sunday is not first day in the output week. */
726 if (ctl->weekstart) {
727 first_week_day -= ctl->weekstart;
728 if (first_week_day < 0)
729 first_week_day = DAYS_IN_WEEK - ctl->weekstart;
730 month_days += ctl->weekstart - 1;
731 }
732
733 /* Fill day array. */
734 for (i = 0; i < MAXDAYS; i++) {
735 if (0 < first_week_day) {
736 month->days[i] = SPACE;
737 first_week_day--;
738 continue;
739 }
740 if (j < month_days) {
741 if (month->year == ctl->reform_year &&
742 month->month == REFORMATION_MONTH &&
743 (j == 3 || j == 247))
744 j += NUMBER_MISSING_DAYS;
745 month->days[i] = j;
746 j++;
747 continue;
748 }
749 month->days[i] = SPACE;
750 weeklines++;
751 }
752
753 /* Add week numbers */
754 if (ctl->weektype) {
755 int weeknum = week_number(1, month->month, month->year, ctl);
756 weeklines = MAXDAYS / DAYS_IN_WEEK - weeklines / DAYS_IN_WEEK;
757 for (i = 0; i < MAXDAYS / DAYS_IN_WEEK; i++) {
758 if (0 < weeklines) {
759 if (52 < weeknum)
760 weeknum = week_number(month->days[i * DAYS_IN_WEEK], month->month, month->year, ctl);
761 month->weeks[i] = weeknum++;
762 } else
763 month->weeks[i] = SPACE;
764 weeklines--;
765 }
766 }
767 }
768
769 static void cal_output_header(struct cal_month *month, const struct cal_control *ctl)
770 {
771 char out[FMT_ST_CHARS];
772 struct cal_month *i;
773
774 cal_enable_color(CAL_COLOR_HEADER);
775
776 if (ctl->header_hint || ctl->header_year) {
777 for (i = month; i; i = i->next) {
778 snprintf(out, sizeof(out), "%s", ctl->full_month[i->month - 1]);
779 center(out, ctl->week_width, i->next == NULL ? 0 : ctl->gutter_width);
780 }
781 if (!ctl->header_year) {
782 fputc('\n', stdout);
783 for (i = month; i; i = i->next) {
784 snprintf(out, sizeof(out), "%04d", i->year);
785 center(out, ctl->week_width, i->next == NULL ? 0 : ctl->gutter_width);
786 }
787 }
788 } else {
789 for (i = month; i; i = i->next) {
790 snprintf(out, sizeof(out), "%s %04d", ctl->full_month[i->month - 1], i->year);
791 center(out, ctl->week_width, i->next == NULL ? 0 : ctl->gutter_width);
792 }
793 }
794 fputc('\n', stdout);
795 for (i = month; i; i = i->next) {
796 if (ctl->weektype) {
797 if (ctl->julian)
798 printf("%*s%s", (int)ctl->day_width - 1, "", day_headings);
799 else
800 printf("%*s%s", (int)ctl->day_width, "", day_headings);
801 } else
802 fputs(day_headings, stdout);
803 if (i->next != NULL)
804 printf("%*s", ctl->gutter_width, "");
805 }
806 cal_disable_color(CAL_COLOR_HEADER);
807 fputc('\n', stdout);
808 }
809
810 static void cal_vert_output_header(struct cal_month *month,
811 const struct cal_control *ctl)
812 {
813 char out[FMT_ST_CHARS];
814 struct cal_month *m;
815 int month_width;
816
817 month_width = ctl->day_width * (MAXDAYS / DAYS_IN_WEEK);
818
819 /* Padding for the weekdays */
820 printf("%*s", (int)ctl->day_width + 1, "");
821
822 if (ctl->header_hint || ctl->header_year) {
823 for (m = month; m; m = m->next) {
824 snprintf(out, sizeof(out), "%s", ctl->full_month[m->month - 1]);
825 left(out, month_width, ctl->gutter_width);
826 }
827 if (!ctl->header_year) {
828 fputc('\n', stdout);
829 /* Padding for the weekdays */
830 printf("%*s", (int)ctl->day_width + 1, "");
831
832 for (m = month; m; m = m->next) {
833 snprintf(out, sizeof(out), "%04d", m->year);
834 left(out, month_width, ctl->gutter_width);
835 }
836 }
837 } else {
838 for (m = month; m; m = m->next) {
839 snprintf(out, sizeof(out), "%s %04d", ctl->full_month[m->month - 1], m->year);
840 left(out, month_width, ctl->gutter_width);
841 }
842 }
843 fputc('\n', stdout);
844 }
845
846 #define fput_seq(_s) do { if ((_s) && *(_s)) fputs((_s), stdout); } while(0)
847
848 static void cal_output_months(struct cal_month *month, const struct cal_control *ctl)
849 {
850 int reqday, week_line, d;
851 int skip;
852 struct cal_month *i;
853 int firstwork = ctl->weekstart == SUNDAY ? 1 : 0; /* first workday in week */
854
855 /* Let's keep sequence cached rather than search it for each day */
856 const char *seq_wo_start = cal_get_color_sequence(CAL_COLOR_WORKDAY);
857 const char *seq_wo_end = cal_get_color_disable_sequence(CAL_COLOR_WORKDAY);
858 const char *seq_we_start = cal_get_color_sequence(CAL_COLOR_WEEKEND);
859 const char *seq_we_end = cal_get_color_disable_sequence(CAL_COLOR_WEEKEND);
860
861 for (week_line = 0; week_line < MAXDAYS / DAYS_IN_WEEK; week_line++) {
862 for (i = month; i; i = i->next) {
863 /* Determine the day that should be highlighted. */
864 reqday = 0;
865 if (i->month == ctl->req.month && i->year == ctl->req.year) {
866 if (ctl->julian)
867 reqday = ctl->req.day;
868 else
869 reqday = ctl->req.day + 1 -
870 day_in_year(ctl, 1, i->month,
871 i->year);
872 }
873
874 if (ctl->weektype) {
875 if (0 < i->weeks[week_line]) {
876 if ((ctl->weektype & WEEK_NUM_MASK) == i->weeks[week_line])
877 printf("%s%2d%s",
878 cal_get_color_sequence(CAL_COLOR_WEEKNUMBER),
879 i->weeks[week_line],
880 cal_get_color_disable_sequence(CAL_COLOR_WEEKNUMBER));
881 else
882 printf("%2d", i->weeks[week_line]);
883 } else
884 printf("%2s", "");
885 skip = ctl->day_width;
886 } else
887 /* First day of the week is one char narrower than the other days,
888 * unless week number is printed. */
889 skip = ctl->day_width - 1;
890
891 for (d = DAYS_IN_WEEK * week_line;
892 d < DAYS_IN_WEEK * week_line + DAYS_IN_WEEK; d++) {
893
894 int workday = d >= DAYS_IN_WEEK * week_line + firstwork &&
895 d <= DAYS_IN_WEEK * week_line + firstwork + 4;
896
897 if (0 < i->days[d]) {
898 fput_seq(workday ? seq_wo_start : seq_we_start);
899
900 if (reqday == i->days[d])
901 printf("%*s%s%*d%s",
902 skip - (ctl->julian ? 3 : 2),
903 "", cal_get_color_sequence(CAL_COLOR_TODAY), (ctl->julian ? 3 : 2),
904 i->days[d], cal_get_color_disable_sequence(CAL_COLOR_TODAY));
905 else
906 printf("%*d", skip, i->days[d]);
907
908 fput_seq(workday ? seq_wo_end : seq_we_end);
909 } else
910 printf("%*s", skip, "");
911
912 if (skip < (int)ctl->day_width)
913 skip++;
914 }
915 if (i->next != NULL)
916 printf("%*s", ctl->gutter_width, "");
917 }
918 if (i == NULL)
919 fputc('\n', stdout);
920 }
921 }
922
923 static void
924 cal_vert_output_months(struct cal_month *month, const struct cal_control *ctl)
925 {
926 int i, reqday, week, d;
927 int skip;
928 struct cal_month *m;
929
930 skip = ctl->day_width;
931 for (i = 0; i < DAYS_IN_WEEK; i++) {
932 left(ctl->weekdays[i], ctl->day_width - 1, 0);
933 for (m = month; m; m = m->next) {
934 reqday = 0;
935 if (m->month == ctl->req.month && m->year == ctl->req.year) {
936 if (ctl->julian) {
937 reqday = ctl->req.day;
938 } else {
939 reqday = ctl->req.day + 1 -
940 day_in_year(ctl, 1, m->month, m->year);
941 }
942 }
943 for (week = 0; week < MAXDAYS / DAYS_IN_WEEK; week++) {
944 d = i + DAYS_IN_WEEK * week;
945 if (0 < m->days[d]) {
946 if (reqday == m->days[d]) {
947 printf("%*s%s%*d%s",
948 skip - (ctl->julian ? 3 : 2),
949 "",
950 cal_get_color_sequence(CAL_COLOR_TODAY),
951 (ctl->julian ? 3 : 2),
952 m->days[d],
953 cal_get_color_disable_sequence(CAL_COLOR_TODAY));
954 } else {
955 printf("%*d", skip, m->days[d]);
956 }
957 } else {
958 printf("%*s", skip, "");
959 }
960 skip = ctl->day_width;
961 }
962 if (m->next != NULL)
963 printf("%*s", ctl->gutter_width, "");
964 }
965 fputc('\n', stdout);
966 }
967 if (!ctl->weektype)
968 return;
969
970 printf("%*s", (int)ctl->day_width - 1, "");
971 for (m = month; m; m = m->next) {
972 for (week = 0; week < MAXDAYS / DAYS_IN_WEEK; week++) {
973 if (0 < m->weeks[week]) {
974 if ((ctl->weektype & WEEK_NUM_MASK) == m->weeks[week])
975 printf("%s%*d%s",
976 cal_get_color_sequence(CAL_COLOR_WEEKNUMBER),
977 skip - (ctl->julian ? 3 : 2),
978 m->weeks[week],
979 cal_get_color_disable_sequence(CAL_COLOR_WEEKNUMBER));
980 else
981 printf("%*d", skip, m->weeks[week]);
982 } else
983 printf("%*s", skip, "");
984 }
985 if (m->next != NULL)
986 printf("%*s", ctl->gutter_width, "");
987 }
988 fputc('\n', stdout);
989 }
990
991
992 static void monthly(const struct cal_control *ctl)
993 {
994 struct cal_month *m, *ms;
995 int i, rows, month = ctl->req.start_month ? ctl->req.start_month : ctl->req.month;
996 int32_t year = ctl->req.year;
997
998 /* cal -3, cal -Y --span, etc. */
999 if (ctl->span_months) {
1000 int new_month = month - ctl->num_months / 2;
1001 if (new_month < 1) {
1002 new_month *= -1;
1003 year -= (new_month / MONTHS_IN_YEAR) + 1;
1004
1005 if (new_month > MONTHS_IN_YEAR)
1006 new_month %= MONTHS_IN_YEAR;
1007 month = MONTHS_IN_YEAR - new_month;
1008 } else
1009 month = new_month;
1010 }
1011
1012 ms = xcalloc(ctl->months_in_row, sizeof(*ms));
1013
1014 for (i = 0; i < ctl->months_in_row - 1; i++)
1015 ms[i].next = &ms[i + 1];
1016
1017 rows = (ctl->num_months - 1) / ctl->months_in_row;
1018 for (i = 0; i < rows + 1 ; i++){
1019 if (i == rows && ctl->num_months % ctl->months_in_row > 0)
1020 for (int n = (ctl->num_months % ctl->months_in_row) - 1; n < ctl->months_in_row; n++)
1021 ms[n].next = NULL;
1022
1023 for (m = ms; m; m = m->next){
1024 m->month = month++;
1025 m->year = year;
1026 if (MONTHS_IN_YEAR < month) {
1027 year++;
1028 month = 1;
1029 }
1030 cal_fill_month(m, ctl);
1031 }
1032 if (ctl->vertical) {
1033 if (i > 0)
1034 fputc('\n', stdout); /* Add a line between row */
1035
1036 cal_vert_output_header(ms, ctl);
1037 cal_vert_output_months(ms, ctl);
1038 } else {
1039 cal_output_header(ms, ctl);
1040 cal_output_months(ms, ctl);
1041 }
1042 }
1043 free(ms);
1044 }
1045
1046 static void yearly(const struct cal_control *ctl)
1047 {
1048 size_t year_width;
1049
1050 year_width = (size_t) ctl->months_in_row * ctl->week_width
1051 + ((size_t) ctl->months_in_row - 1) * ctl->gutter_width;
1052
1053 if (ctl->header_year) {
1054 char out[FMT_ST_CHARS];
1055
1056 snprintf(out, sizeof(out), "%04d", ctl->req.year);
1057 center(out, year_width, 0);
1058 fputs("\n\n", stdout);
1059 }
1060 monthly(ctl);
1061 }
1062
1063 /*
1064 * day_in_year --
1065 * return the 1 based day number within the year
1066 */
1067 static int day_in_year(const struct cal_control *ctl,
1068 int day, int month, int32_t year)
1069 {
1070 int i, leap;
1071
1072 leap = leap_year(ctl, year);
1073 for (i = 1; i < month; i++)
1074 day += days_in_month[leap][i];
1075 return day;
1076 }
1077
1078 /*
1079 * day_in_week
1080 * return the 0 based day number for any date from 1 Jan. 1 to
1081 * 31 Dec. 9999. Assumes the Gregorian reformation eliminates
1082 * 3 Sep. 1752 through 13 Sep. 1752, and returns invalid weekday
1083 * during the period of 11 days.
1084 */
1085 static int day_in_week(const struct cal_control *ctl, int day,
1086 int month, int32_t year)
1087 {
1088 /*
1089 * The magic constants in the reform[] array are, in a simplified
1090 * sense, the remaining days after slicing into one week periods the total
1091 * days from the beginning of the year to the target month. That is,
1092 * weeks + reform[] days gets us to the target month. The exception is,
1093 * that for the months past February 'DOY - 1' must be used.
1094 *
1095 * DoY (Day of Year): total days to the target month
1096 *
1097 * Month 1 2 3 4 5 6 7 8 9 10 11 12
1098 * DoY 0 31 59 90 120 151 181 212 243 273 304 334
1099 * DoY % 7 0 3
1100 * DoY - 1 % 7 - -- 2 5 0 3 5 1 4 6 2 4
1101 * reform[] = { 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 };
1102 *
1103 * Note: these calculations are for non leap years.
1104 */
1105 static const int reform[] = { 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 };
1106 static const int old[] = { 5, 1, 0, 3, 5, 1, 3, 6, 2, 4, 0, 2 };
1107
1108 if (year != ctl->reform_year + 1)
1109 year -= month < MARCH;
1110 else
1111 year -= (month < MARCH) + 14;
1112 if (ctl->reform_year < year
1113 || (year == ctl->reform_year && REFORMATION_MONTH < month)
1114 || (year == ctl->reform_year
1115 && month == REFORMATION_MONTH && 13 < day)) {
1116 return ((int64_t) year + (year / 4)
1117 - (year / 100) + (year / 400)
1118 + reform[month - 1] + day) % DAYS_IN_WEEK;
1119 }
1120 if (year < ctl->reform_year
1121 || (year == ctl->reform_year && month < REFORMATION_MONTH)
1122 || (year == ctl->reform_year && month == REFORMATION_MONTH && day < 3))
1123 return ((int64_t) year + year / 4 + old[month - 1] + day)
1124 % DAYS_IN_WEEK;
1125 return NONEDAY;
1126 }
1127
1128 /*
1129 * week_number
1130 * return the week number of a given date, 1..54.
1131 * Supports ISO-8601 and North American modes.
1132 * Day may be given as Julian day of the year mode, in which
1133 * case the month is disregarded entirely.
1134 */
1135 static int week_number(int day, int month, int32_t year, const struct cal_control *ctl)
1136 {
1137 int fday = 0, yday;
1138 const int wday = day_in_week(ctl, 1, JANUARY, year);
1139
1140 if (ctl->weektype & WEEK_NUM_ISO)
1141 fday = wday + (wday >= FRIDAY ? -2 : 5);
1142 else {
1143 /* WEEK_NUM_US: Jan 1 is always First week, that may
1144 * begin previous year. That means there is very seldom
1145 * more than 52 weeks, */
1146 fday = wday + 6;
1147 }
1148 /* For julian dates the month can be set to 1, the global julian
1149 * variable cannot be relied upon here, because we may recurse
1150 * internally for 31.12. which would not work. */
1151 if (day > DAYS_IN_MONTH)
1152 month = JANUARY;
1153
1154 yday = day_in_year(ctl, day, month, year);
1155 if (year == ctl->reform_year && yday >= YDAY_AFTER_MISSING)
1156 fday -= NUMBER_MISSING_DAYS;
1157
1158 /* Last year is last year */
1159 if (yday + fday < DAYS_IN_WEEK)
1160 return week_number(31, DECEMBER, year - 1, ctl);
1161
1162 /* Or it could be part of the next year. The reformation year had less
1163 * days than 365 making this check invalid, but reformation year ended
1164 * on Sunday and in week 51, so it's ok here. */
1165 if (ctl->weektype == WEEK_NUM_ISO && yday >= 363
1166 && day_in_week(ctl, day, month, year) >= MONDAY
1167 && day_in_week(ctl, day, month, year) <= WEDNESDAY
1168 && day_in_week(ctl, 31, DECEMBER, year) >= MONDAY
1169 && day_in_week(ctl, 31, DECEMBER, year) <= WEDNESDAY)
1170 return week_number(1, JANUARY, year + 1, ctl);
1171
1172 return (yday + fday) / DAYS_IN_WEEK;
1173 }
1174
1175 /*
1176 * week_to_day
1177 * return the yday of the first day in a given week inside
1178 * the given year. This may be something other than Monday
1179 * for ISO-8601 modes. For North American numbering this
1180 * always returns a Sunday.
1181 */
1182 static int week_to_day(const struct cal_control *ctl)
1183 {
1184 int yday, wday;
1185
1186 wday = day_in_week(ctl, 1, JANUARY, ctl->req.year);
1187 yday = ctl->req.week * DAYS_IN_WEEK - wday;
1188
1189 if (ctl->req.year == ctl->reform_year && yday >= YDAY_AFTER_MISSING)
1190 yday += NUMBER_MISSING_DAYS;
1191
1192 if (ctl->weektype & WEEK_NUM_ISO)
1193 yday -= (wday >= FRIDAY ? -2 : 5);
1194 else
1195 yday -= 6; /* WEEK_NUM_US */
1196 if (yday <= 0)
1197 return 1;
1198
1199 return yday;
1200 }
1201
1202 /*
1203 * Center string, handling multibyte characters appropriately.
1204 * In addition if the string is too large for the width it's truncated.
1205 * The number of trailing spaces may be 1 less than the number of leading spaces.
1206 */
1207 static int center_str(const char* src, char* dest,
1208 size_t dest_size, size_t width)
1209 {
1210 return mbsalign(src, dest, dest_size, &width,
1211 MBS_ALIGN_CENTER, MBA_UNIBYTE_FALLBACK);
1212 }
1213
1214 static void center(const char *str, size_t len, int separate)
1215 {
1216 char lineout[FMT_ST_CHARS];
1217
1218 center_str(str, lineout, ARRAY_SIZE(lineout), len);
1219 fputs(lineout, stdout);
1220
1221 if (separate)
1222 printf("%*s", separate, "");
1223 }
1224 static int left_str(const char* src, char* dest,
1225 size_t dest_size, size_t width)
1226 {
1227 return mbsalign(src, dest, dest_size, &width,
1228 MBS_ALIGN_LEFT, MBA_UNIBYTE_FALLBACK);
1229 }
1230
1231 static void left(const char *str, size_t len, int separate)
1232 {
1233 char lineout[FMT_ST_CHARS];
1234
1235 left_str(str, lineout, sizeof(lineout), len);
1236 fputs(lineout, stdout);
1237
1238 if (separate)
1239 printf("%*s", separate, "");
1240 }
1241
1242 static int parse_reform_year(const char *reform_year)
1243 {
1244 size_t i;
1245
1246 struct reform {
1247 char *name;
1248 int val;
1249 };
1250
1251 struct reform years[] = {
1252 {"gregorian", GREGORIAN},
1253 {"iso", ISO},
1254 {"1752", GB1752},
1255 {"julian", JULIAN},
1256 };
1257
1258 for (i = 0; i < ARRAY_SIZE(years); i++) {
1259 if (strcasecmp(reform_year, years[i].name) == 0)
1260 return years[i].val;
1261 }
1262 errx(EXIT_FAILURE, "invalid --reform value: '%s'", reform_year);
1263 }
1264
1265 static void __attribute__((__noreturn__)) usage(void)
1266 {
1267 FILE *out = stdout;
1268
1269 fputs(USAGE_HEADER, out);
1270 fprintf(out, _(" %s [options] [[[day] month] year]\n"), program_invocation_short_name);
1271 fprintf(out, _(" %s [options] <timestamp|monthname>\n"), program_invocation_short_name);
1272
1273 fputs(USAGE_SEPARATOR, out);
1274 fputs(_("Display a calendar, or some part of it.\n"), out);
1275 fputs(_("Without any arguments, display the current month.\n"), out);
1276
1277 fputs(USAGE_OPTIONS, out);
1278 fputs(_(" -1, --one show only a single month (default)\n"), out);
1279 fputs(_(" -3, --three show three months spanning the date\n"), out);
1280 fputs(_(" -n, --months <num> show num months starting with date's month\n"), out);
1281 fputs(_(" -S, --span span the date when displaying multiple months\n"), out);
1282 fputs(_(" -s, --sunday Sunday as first day of week\n"), out);
1283 fputs(_(" -m, --monday Monday as first day of week\n"), out);
1284 fputs(_(" -j, --julian use day-of-year for all calendars\n"), out);
1285 fputs(_(" --reform <val> Gregorian reform date (1752|gregorian|iso|julian)\n"), out);
1286 fputs(_(" --iso alias for --reform=iso\n"), out);
1287 fputs(_(" -y, --year show the whole year\n"), out);
1288 fputs(_(" -Y, --twelve show the next twelve months\n"), out);
1289 fputs(_(" -w, --week[=<num>] show US or ISO-8601 week numbers\n"), out);
1290 fputs(_(" -v, --vertical show day vertically instead of line\n"), out);
1291 fputs(_(" -c, --columns <width> amount of columns to use\n"), out);
1292 fprintf(out,
1293 _(" --color[=<when>] colorize messages (%s, %s or %s)\n"), "auto", "always", "never");
1294 fprintf(out,
1295 " %s\n", USAGE_COLORS_DEFAULT);
1296
1297 fputs(USAGE_SEPARATOR, out);
1298 printf(USAGE_HELP_OPTIONS(23));
1299 printf(USAGE_MAN_TAIL("cal(1)"));
1300
1301 exit(EXIT_SUCCESS);
1302 }