2 * Copyright (c) 1989, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
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 MiĆkiewicz <misiek@pld.ORG.PL>
40 * - added Native Language Support
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.
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
58 #include <sys/types.h>
71 #include "closestream.h"
77 #include "timeutils.h"
81 #define DOY_MONTH_WIDTH 27 /* -j month width */
82 #define DOM_MONTH_WIDTH 20 /* month width */
92 static const struct { const char * const scheme
; const char * dflt
; } colors
[] =
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", "" }
101 static inline void cal_enable_color(int id
)
103 color_scheme_enable(colors
[id
].scheme
, colors
[id
].dflt
);
106 static inline const char *cal_get_color_sequence(int id
)
108 return color_scheme_get_sequence(colors
[id
].scheme
, colors
[id
].dflt
);
111 static inline void cal_disable_color(int id
)
113 const char *seq
= cal_get_color_sequence(id
);
118 static inline const char *cal_get_color_disable_sequence(int id
)
120 const char *seq
= cal_get_color_sequence(id
);
122 return UL_COLOR_RESET
;
127 #include "widechar.h"
130 GREGORIAN
= INT32_MIN
,
133 DEFAULT_REFORM_YEAR
= 1752,
164 #define REFORMATION_MONTH SEPTEMBER
165 #define NUMBER_MISSING_DAYS 11 /* 11 day correction */
166 #define YDAY_AFTER_MISSING 258 /* 14th in Sep 1752 */
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 */
173 #define SMALLEST_YEAR 1
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 */
180 #define FMT_ST_CHARS 300 /* 90 suffices in most locales */
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},
188 WEEK_NUM_DISABLED
= 0,
195 COLUMNS_MAX_THREE
= -1,
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];
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 */
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 */
234 int days
[MAXDAYS
]; /* the day numbers, or SPACE */
235 int weeks
[MAXDAYS
/ DAYS_IN_WEEK
];
238 struct cal_month
*next
;
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);
265 static time_t cal_time(time_t *t
)
267 char *str
= getenv("CAL_TEST_TIME");
270 uint64_t x
= strtou64_or_err(str
, "failed to parse CAL_TEST_TIME");
279 # define cal_time(t) time(t)
282 int main(int argc
, char **argv
)
284 struct tm local_time
;
286 int ch
= 0, yflag
= 0, Yflag
= 0, cols
= COLUMNS_MAX_THREE
;
288 static struct cal_control ctl
= {
289 .reform_year
= DEFAULT_REFORM_YEAR
,
292 .colormode
= UL_COLORMODE_UNDEF
,
293 .weektype
= WEEK_NUM_DISABLED
,
294 .day_width
= DAY_LEN
,
301 OPT_COLOR
= CHAR_MAX
+ 1,
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 {"columns", required_argument
, NULL
,'c'},
327 static const ul_excl_t excl
[] = { /* rows and cols in ASCII order */
331 int excl_st
[ARRAY_SIZE(excl
)] = UL_EXCL_STATUS_INIT
;
333 setlocale(LC_ALL
, "");
334 bindtextdomain(PACKAGE
, LOCALEDIR
);
336 close_stdout_atexit();
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.
344 #if HAVE_DECL__NL_TIME_WEEK_1STDAY
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:
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
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
364 union { unsigned int word
; char *string
; } val
;
365 val
.string
= nl_langinfo(_NL_TIME_WEEK_1STDAY
);
368 wfd
= day_in_week(&ctl
, wfd
% 100, (wfd
/ 100) % 100,
370 ctl
.weekstart
= (wfd
+ *nl_langinfo(_NL_TIME_FIRST_WEEKDAY
) - 1) % DAYS_IN_WEEK
;
373 while ((ch
= getopt_long(argc
, argv
, "13mjn:sSywYvc:Vh", longopts
, NULL
)) != -1) {
375 err_exclusive_options(ch
, longopts
, excl
, excl_st
);
386 ctl
.weekstart
= SUNDAY
; /* default */
389 ctl
.weekstart
= MONDAY
;
393 ctl
.day_width
= DAY_LEN
+ 1;
402 ctl
.num_months
= strtou32_or_err(optarg
,
403 _("invalid month argument"));
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"));
415 ctl
.weektype
= WEEK_NUM_US
; /* default per weekstart */
418 ctl
.colormode
= UL_COLORMODE_AUTO
;
420 ctl
.colormode
= colormode_or_err(optarg
,
421 _("unsupported color mode"));
424 ctl
.reform_year
= parse_reform_year(optarg
);
427 ctl
.reform_year
= ISO
;
433 if (strcmp(optarg
, "auto") == 0)
436 cols
= strtosize_or_err(optarg
,
437 _("failed to parse columns"));
440 print_version(EXIT_SUCCESS
);
444 errtryhelp(EXIT_FAILURE
);
452 ctl
.weektype
= ctl
.req
.week
& WEEK_NUM_MASK
;
453 ctl
.weektype
|= (ctl
.weekstart
== MONDAY
? WEEK_NUM_ISO
: WEEK_NUM_US
);
454 ctl
.week_width
= (ctl
.day_width
* DAYS_IN_WEEK
) + WNUM_LEN
;
456 ctl
.week_width
= ctl
.day_width
* DAYS_IN_WEEK
;
458 * The day_width includes the space between days,
459 * as there is no leading space, remove 1
463 if (argc
== 1 && !isdigit_string(*argv
)) {
465 /* cal <timestamp> */
466 if (parse_timestamp(*argv
, &x
) == 0)
467 now
= (time_t) (x
/ 1000000);
468 /* cal <monthname> */
469 else if ((ctl
.req
.month
= monthname_to_number(&ctl
, *argv
)) > 0)
470 cal_time(&now
); /* this year */
472 errx(EXIT_FAILURE
, _("failed to parse timestamp or unknown month name: %s"), *argv
);
477 localtime_r(&now
, &local_time
);
481 ctl
.req
.day
= strtos32_or_err(*argv
++, _("illegal day value"));
482 if (ctl
.req
.day
< 1 || DAYS_IN_MONTH
< ctl
.req
.day
)
483 errx(EXIT_FAILURE
, _("illegal day value: use 1-%d"), DAYS_IN_MONTH
);
487 ctl
.req
.month
= strtos32_or_err(*argv
++, _("illegal month value: use 1-12"));
489 ctl
.req
.month
= monthname_to_number(&ctl
, *argv
);
490 if (ctl
.req
.month
< 0)
491 errx(EXIT_FAILURE
, _("unknown month name: %s"), *argv
);
494 if (ctl
.req
.month
< 1 || MONTHS_IN_YEAR
< ctl
.req
.month
)
495 errx(EXIT_FAILURE
, _("illegal month value: use 1-12"));
498 ctl
.req
.year
= strtos32_or_err(*argv
++, _("illegal year value"));
499 if (ctl
.req
.year
< SMALLEST_YEAR
)
500 errx(EXIT_FAILURE
, _("illegal year value: use positive integer"));
501 if (ctl
.req
.year
== JULIAN
)
502 errx(EXIT_FAILURE
, _("illegal year value"));
504 int dm
= days_in_month
[leap_year(&ctl
, ctl
.req
.year
)]
506 if (ctl
.req
.day
> dm
)
507 errx(EXIT_FAILURE
, _("illegal day value: use 1-%d"), dm
);
508 ctl
.req
.day
= day_in_year(&ctl
, ctl
.req
.day
,
509 ctl
.req
.month
, ctl
.req
.year
);
510 } else if ((int32_t) (local_time
.tm_year
+ 1900) == ctl
.req
.year
) {
511 ctl
.req
.day
= local_time
.tm_yday
+ 1;
513 if (!ctl
.req
.month
&& !ctl
.req
.week
) {
514 ctl
.req
.month
= local_time
.tm_mon
+ 1;
520 ctl
.req
.day
= local_time
.tm_yday
+ 1;
521 ctl
.req
.year
= local_time
.tm_year
+ 1900;
523 ctl
.req
.month
= local_time
.tm_mon
+ 1;
526 warnx(_("bad usage"));
527 errtryhelp(EXIT_FAILURE
);
530 if (0 < ctl
.req
.week
) {
531 int yday
= week_to_day(&ctl
);
532 int leap
= leap_year(&ctl
, ctl
.req
.year
);
536 errx(EXIT_FAILURE
, _("illegal week value: year %d "
537 "doesn't have week %d"),
538 ctl
.req
.year
, ctl
.req
.week
);
539 while (m
<= DECEMBER
&& yday
> days_in_month
[leap
][m
])
540 yday
-= days_in_month
[leap
][m
++];
541 if (DECEMBER
< m
&& ctl
.weektype
& WEEK_NUM_ISO
) {
542 /* In some years (e.g. 2010 in ISO mode) it's possible
543 * to have a remnant of week 53 starting the year yet
544 * the year in question ends during 52, in this case
545 * we're assuming that early remnant is being referred
546 * to if 53 is given as argument. */
547 if (ctl
.req
.week
!= week_number(31, DECEMBER
, ctl
.req
.year
- 1, &ctl
))
549 _("illegal week value: year %d "
550 "doesn't have week %d"),
551 ctl
.req
.year
, ctl
.req
.week
);
554 ctl
.req
.month
= MONTHS_IN_YEAR
< m
? 1 : m
;
560 if (colors_init(ctl
.colormode
, "cal") == 0) {
563 ctl
.weektype
&= ~WEEK_NUM_MASK
;
566 if (yflag
|| Yflag
) {
567 ctl
.gutter_width
= 3;
569 ctl
.num_months
= MONTHS_IN_YEAR
;
571 ctl
.req
.start_month
= 1; /* start from Jan */
572 ctl
.header_year
= 1; /* print year number */
577 ctl
.gutter_width
= 1;
579 if (ctl
.num_months
> 1 && ctl
.months_in_row
== 0) {
580 ctl
.months_in_row
= MONTHS_IN_YEAR_ROW
; /* default */
583 ctl
.months_in_row
= cols
;
584 else if (isatty(STDOUT_FILENO
)) {
585 int w
, mw
, extra
, new_n
;
587 w
= get_terminal_width(80);
588 mw
= ctl
.julian
? DOY_MONTH_WIDTH
: DOM_MONTH_WIDTH
;
593 extra
= ((w
/ mw
) - 1) * ctl
.gutter_width
;
594 new_n
= (w
- extra
) / mw
;
597 case COLUMNS_MAX_THREE
:
598 if (new_n
< MONTHS_IN_YEAR_ROW
)
599 ctl
.months_in_row
= new_n
> 0 ? new_n
: 1;
602 ctl
.months_in_row
= new_n
> 0 ? new_n
: 1;
606 } else if (!ctl
.months_in_row
)
607 ctl
.months_in_row
= 1;
610 ctl
.num_months
= 1; /* display at least one month */
620 /* leap year -- account for gregorian reformation in 1752 */
621 static int leap_year(const struct cal_control
*ctl
, int32_t year
)
623 if (year
<= ctl
->reform_year
)
626 return ( !(year
% 4) && (year
% 100) ) || !(year
% 400);
629 static void init_monthnames(struct cal_control
*ctl
)
633 if (ctl
->full_month
[0] != NULL
)
634 return; /* already initialized */
636 for (i
= 0; i
< MONTHS_IN_YEAR
; i
++)
637 ctl
->full_month
[i
] = nl_langinfo(ALTMON_1
+ i
);
640 static void init_abbr_monthnames(struct cal_control
*ctl
)
644 if (ctl
->abbr_month
[0] != NULL
)
645 return; /* already initialized */
647 for (i
= 0; i
< MONTHS_IN_YEAR
; i
++)
648 ctl
->abbr_month
[i
] = nl_langinfo(_NL_ABALTMON_1
+ i
);
651 static int monthname_to_number(struct cal_control
*ctl
, const char *name
)
655 init_monthnames(ctl
);
656 for (i
= 0; i
< MONTHS_IN_YEAR
; i
++)
657 if (strcasecmp(ctl
->full_month
[i
], name
) == 0)
660 init_abbr_monthnames(ctl
);
661 for (i
= 0; i
< MONTHS_IN_YEAR
; i
++)
662 if (strcasecmp(ctl
->abbr_month
[i
], name
) == 0)
668 static void weekdays_init(struct cal_control
*ctl
)
673 for (i
= 0; i
< DAYS_IN_WEEK
; i
++) {
674 wd
= (i
+ ctl
->weekstart
) % DAYS_IN_WEEK
;
675 ctl
->weekdays
[i
] = nl_langinfo(ABDAY_1
+ wd
);
678 static void headers_init(struct cal_control
*ctl
)
681 char *cur_dh
= day_headings
;
682 char tmp
[FMT_ST_CHARS
];
685 year_len
= snprintf(tmp
, sizeof(tmp
), "%04d", ctl
->req
.year
);
687 if (year_len
< 0 || (size_t)year_len
>= sizeof(tmp
)) {
688 /* XXX impossible error */
692 for (i
= 0; i
< DAYS_IN_WEEK
; i
++) {
695 space_left
= sizeof(day_headings
) - (cur_dh
- day_headings
);
697 strncat(cur_dh
++, " ", space_left
--);
699 if (space_left
<= (ctl
->day_width
- 1))
701 cur_dh
+= center_str(ctl
->weekdays
[i
], cur_dh
,
702 space_left
, ctl
->day_width
- 1);
705 init_monthnames(ctl
);
707 for (i
= 0; i
< MONTHS_IN_YEAR
; i
++) {
708 /* The +1 after year_len is space in between month and year. */
709 if (ctl
->week_width
< strlen(ctl
->full_month
[i
]) + year_len
)
710 ctl
->header_hint
= 1;
714 static void cal_fill_month(struct cal_month
*month
, const struct cal_control
*ctl
)
716 int first_week_day
= day_in_week(ctl
, 1, month
->month
, month
->year
);
718 int i
, j
, weeklines
= 0;
721 j
= day_in_year(ctl
, 1, month
->month
, month
->year
);
724 month_days
= j
+ days_in_month
[leap_year(ctl
, month
->year
)][month
->month
];
726 /* True when Sunday is not first day in the output week. */
727 if (ctl
->weekstart
) {
728 first_week_day
-= ctl
->weekstart
;
729 if (first_week_day
< 0)
730 first_week_day
= DAYS_IN_WEEK
- ctl
->weekstart
;
731 month_days
+= ctl
->weekstart
- 1;
734 /* Fill day array. */
735 for (i
= 0; i
< MAXDAYS
; i
++) {
736 if (0 < first_week_day
) {
737 month
->days
[i
] = SPACE
;
741 if (j
< month_days
) {
742 if (month
->year
== ctl
->reform_year
&&
743 month
->month
== REFORMATION_MONTH
&&
744 (j
== 3 || j
== 247))
745 j
+= NUMBER_MISSING_DAYS
;
750 month
->days
[i
] = SPACE
;
754 /* Add week numbers */
756 int weeknum
= week_number(1, month
->month
, month
->year
, ctl
);
757 weeklines
= MAXDAYS
/ DAYS_IN_WEEK
- weeklines
/ DAYS_IN_WEEK
;
758 for (i
= 0; i
< MAXDAYS
/ DAYS_IN_WEEK
; i
++) {
761 weeknum
= week_number(month
->days
[i
* DAYS_IN_WEEK
], month
->month
, month
->year
, ctl
);
762 month
->weeks
[i
] = weeknum
++;
764 month
->weeks
[i
] = SPACE
;
770 static void cal_output_header(struct cal_month
*month
, const struct cal_control
*ctl
)
772 char out
[FMT_ST_CHARS
];
775 cal_enable_color(CAL_COLOR_HEADER
);
777 if (ctl
->header_hint
|| ctl
->header_year
) {
778 for (i
= month
; i
; i
= i
->next
) {
779 snprintf(out
, sizeof(out
), "%s", ctl
->full_month
[i
->month
- 1]);
780 center(out
, ctl
->week_width
, i
->next
== NULL
? 0 : ctl
->gutter_width
);
782 if (!ctl
->header_year
) {
784 for (i
= month
; i
; i
= i
->next
) {
785 snprintf(out
, sizeof(out
), "%04d", i
->year
);
786 center(out
, ctl
->week_width
, i
->next
== NULL
? 0 : ctl
->gutter_width
);
790 for (i
= month
; i
; i
= i
->next
) {
791 snprintf(out
, sizeof(out
), "%s %04d", ctl
->full_month
[i
->month
- 1], i
->year
);
792 center(out
, ctl
->week_width
, i
->next
== NULL
? 0 : ctl
->gutter_width
);
796 for (i
= month
; i
; i
= i
->next
) {
799 printf("%*s%s", (int)ctl
->day_width
- 1, "", day_headings
);
801 printf("%*s%s", (int)ctl
->day_width
, "", day_headings
);
803 fputs(day_headings
, stdout
);
805 printf("%*s", ctl
->gutter_width
, "");
807 cal_disable_color(CAL_COLOR_HEADER
);
811 static void cal_vert_output_header(struct cal_month
*month
,
812 const struct cal_control
*ctl
)
814 char out
[FMT_ST_CHARS
];
818 month_width
= ctl
->day_width
* (MAXDAYS
/ DAYS_IN_WEEK
);
820 /* Padding for the weekdays */
821 printf("%*s", (int)ctl
->day_width
+ 1, "");
823 if (ctl
->header_hint
|| ctl
->header_year
) {
824 for (m
= month
; m
; m
= m
->next
) {
825 snprintf(out
, sizeof(out
), "%s", ctl
->full_month
[m
->month
- 1]);
826 left(out
, month_width
, ctl
->gutter_width
);
828 if (!ctl
->header_year
) {
830 /* Padding for the weekdays */
831 printf("%*s", (int)ctl
->day_width
+ 1, "");
833 for (m
= month
; m
; m
= m
->next
) {
834 snprintf(out
, sizeof(out
), "%04d", m
->year
);
835 left(out
, month_width
, ctl
->gutter_width
);
839 for (m
= month
; m
; m
= m
->next
) {
840 snprintf(out
, sizeof(out
), "%s %04d", ctl
->full_month
[m
->month
- 1], m
->year
);
841 left(out
, month_width
, ctl
->gutter_width
);
847 #define fput_seq(_s) do { if ((_s) && *(_s)) fputs((_s), stdout); } while(0)
849 static void cal_output_months(struct cal_month
*month
, const struct cal_control
*ctl
)
851 int reqday
, week_line
, d
;
854 int firstwork
= ctl
->weekstart
== SUNDAY
? 1 : 0; /* first workday in week */
856 /* Let's keep sequence cached rather than search it for each day */
857 const char *seq_wo_start
= cal_get_color_sequence(CAL_COLOR_WORKDAY
);
858 const char *seq_wo_end
= cal_get_color_disable_sequence(CAL_COLOR_WORKDAY
);
859 const char *seq_we_start
= cal_get_color_sequence(CAL_COLOR_WEEKEND
);
860 const char *seq_we_end
= cal_get_color_disable_sequence(CAL_COLOR_WEEKEND
);
862 for (week_line
= 0; week_line
< MAXDAYS
/ DAYS_IN_WEEK
; week_line
++) {
863 for (i
= month
; i
; i
= i
->next
) {
864 /* Determine the day that should be highlighted. */
866 if (i
->month
== ctl
->req
.month
&& i
->year
== ctl
->req
.year
) {
868 reqday
= ctl
->req
.day
;
870 reqday
= ctl
->req
.day
+ 1 -
871 day_in_year(ctl
, 1, i
->month
,
876 if (0 < i
->weeks
[week_line
]) {
877 if ((ctl
->weektype
& WEEK_NUM_MASK
) == i
->weeks
[week_line
])
879 cal_get_color_sequence(CAL_COLOR_WEEKNUMBER
),
881 cal_get_color_disable_sequence(CAL_COLOR_WEEKNUMBER
));
883 printf("%2d", i
->weeks
[week_line
]);
886 skip
= ctl
->day_width
;
888 /* First day of the week is one char narrower than the other days,
889 * unless week number is printed. */
890 skip
= ctl
->day_width
- 1;
892 for (d
= DAYS_IN_WEEK
* week_line
;
893 d
< DAYS_IN_WEEK
* week_line
+ DAYS_IN_WEEK
; d
++) {
895 int workday
= d
>= DAYS_IN_WEEK
* week_line
+ firstwork
&&
896 d
<= DAYS_IN_WEEK
* week_line
+ firstwork
+ 4;
898 if (0 < i
->days
[d
]) {
899 fput_seq(workday
? seq_wo_start
: seq_we_start
);
901 if (reqday
== i
->days
[d
])
903 skip
- (ctl
->julian
? 3 : 2),
904 "", cal_get_color_sequence(CAL_COLOR_TODAY
), (ctl
->julian
? 3 : 2),
905 i
->days
[d
], cal_get_color_disable_sequence(CAL_COLOR_TODAY
));
907 printf("%*d", skip
, i
->days
[d
]);
909 fput_seq(workday
? seq_wo_end
: seq_we_end
);
911 printf("%*s", skip
, "");
913 if (skip
< (int)ctl
->day_width
)
917 printf("%*s", ctl
->gutter_width
, "");
925 cal_vert_output_months(struct cal_month
*month
, const struct cal_control
*ctl
)
927 int i
, reqday
, week
, d
;
931 skip
= ctl
->day_width
;
932 for (i
= 0; i
< DAYS_IN_WEEK
; i
++) {
933 left(ctl
->weekdays
[i
], ctl
->day_width
- 1, 0);
934 for (m
= month
; m
; m
= m
->next
) {
936 if (m
->month
== ctl
->req
.month
&& m
->year
== ctl
->req
.year
) {
938 reqday
= ctl
->req
.day
;
940 reqday
= ctl
->req
.day
+ 1 -
941 day_in_year(ctl
, 1, m
->month
, m
->year
);
944 for (week
= 0; week
< MAXDAYS
/ DAYS_IN_WEEK
; week
++) {
945 d
= i
+ DAYS_IN_WEEK
* week
;
946 if (0 < m
->days
[d
]) {
947 if (reqday
== m
->days
[d
]) {
949 skip
- (ctl
->julian
? 3 : 2),
951 cal_get_color_sequence(CAL_COLOR_TODAY
),
952 (ctl
->julian
? 3 : 2),
954 cal_get_color_disable_sequence(CAL_COLOR_TODAY
));
956 printf("%*d", skip
, m
->days
[d
]);
959 printf("%*s", skip
, "");
961 skip
= ctl
->day_width
;
964 printf("%*s", ctl
->gutter_width
, "");
971 printf("%*s", (int)ctl
->day_width
- 1, "");
972 for (m
= month
; m
; m
= m
->next
) {
973 for (week
= 0; week
< MAXDAYS
/ DAYS_IN_WEEK
; week
++) {
974 if (0 < m
->weeks
[week
]) {
975 if ((ctl
->weektype
& WEEK_NUM_MASK
) == m
->weeks
[week
])
977 cal_get_color_sequence(CAL_COLOR_WEEKNUMBER
),
978 skip
- (ctl
->julian
? 3 : 2),
980 cal_get_color_disable_sequence(CAL_COLOR_WEEKNUMBER
));
982 printf("%*d", skip
, m
->weeks
[week
]);
984 printf("%*s", skip
, "");
987 printf("%*s", ctl
->gutter_width
, "");
993 static void monthly(const struct cal_control
*ctl
)
995 struct cal_month
*m
, *ms
;
996 int i
, rows
, month
= ctl
->req
.start_month
? ctl
->req
.start_month
: ctl
->req
.month
;
997 int32_t year
= ctl
->req
.year
;
999 /* cal -3, cal -Y --span, etc. */
1000 if (ctl
->span_months
) {
1001 int new_month
= month
- ctl
->num_months
/ 2;
1002 if (new_month
< 1) {
1004 year
-= (new_month
/ MONTHS_IN_YEAR
) + 1;
1006 if (new_month
> MONTHS_IN_YEAR
)
1007 new_month
%= MONTHS_IN_YEAR
;
1008 month
= MONTHS_IN_YEAR
- new_month
;
1013 ms
= xcalloc(ctl
->months_in_row
, sizeof(*ms
));
1015 for (i
= 0; i
< ctl
->months_in_row
- 1; i
++)
1016 ms
[i
].next
= &ms
[i
+ 1];
1018 rows
= (ctl
->num_months
- 1) / ctl
->months_in_row
;
1019 for (i
= 0; i
< rows
+ 1 ; i
++){
1020 if (i
== rows
&& ctl
->num_months
% ctl
->months_in_row
> 0)
1021 for (int n
= (ctl
->num_months
% ctl
->months_in_row
) - 1; n
< ctl
->months_in_row
; n
++)
1024 for (m
= ms
; m
; m
= m
->next
){
1027 if (MONTHS_IN_YEAR
< month
) {
1031 cal_fill_month(m
, ctl
);
1033 if (ctl
->vertical
) {
1035 fputc('\n', stdout
); /* Add a line between row */
1037 cal_vert_output_header(ms
, ctl
);
1038 cal_vert_output_months(ms
, ctl
);
1040 cal_output_header(ms
, ctl
);
1041 cal_output_months(ms
, ctl
);
1047 static void yearly(const struct cal_control
*ctl
)
1051 year_width
= (size_t) ctl
->months_in_row
* ctl
->week_width
1052 + ((size_t) ctl
->months_in_row
- 1) * ctl
->gutter_width
;
1054 if (ctl
->header_year
) {
1055 char out
[FMT_ST_CHARS
];
1057 snprintf(out
, sizeof(out
), "%04d", ctl
->req
.year
);
1058 center(out
, year_width
, 0);
1059 fputs("\n\n", stdout
);
1066 * return the 1 based day number within the year
1068 static int day_in_year(const struct cal_control
*ctl
,
1069 int day
, int month
, int32_t year
)
1073 leap
= leap_year(ctl
, year
);
1074 for (i
= 1; i
< month
; i
++)
1075 day
+= days_in_month
[leap
][i
];
1081 * return the 0 based day number for any date from 1 Jan. 1 to
1082 * 31 Dec. 9999. Assumes the Gregorian reformation eliminates
1083 * 3 Sep. 1752 through 13 Sep. 1752, and returns invalid weekday
1084 * during the period of 11 days.
1086 static int day_in_week(const struct cal_control
*ctl
, int day
,
1087 int month
, int32_t year
)
1090 * The magic constants in the reform[] array are, in a simplified
1091 * sense, the remaining days after slicing into one week periods the total
1092 * days from the beginning of the year to the target month. That is,
1093 * weeks + reform[] days gets us to the target month. The exception is,
1094 * that for the months past February 'DOY - 1' must be used.
1096 * DoY (Day of Year): total days to the target month
1098 * Month 1 2 3 4 5 6 7 8 9 10 11 12
1099 * DoY 0 31 59 90 120 151 181 212 243 273 304 334
1101 * DoY - 1 % 7 - -- 2 5 0 3 5 1 4 6 2 4
1102 * reform[] = { 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 };
1104 * Note: these calculations are for non leap years.
1106 static const int reform
[] = { 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 };
1107 static const int old
[] = { 5, 1, 0, 3, 5, 1, 3, 6, 2, 4, 0, 2 };
1109 if (year
!= ctl
->reform_year
+ 1)
1110 year
-= month
< MARCH
;
1112 year
-= (month
< MARCH
) + 14;
1113 if (ctl
->reform_year
< year
1114 || (year
== ctl
->reform_year
&& REFORMATION_MONTH
< month
)
1115 || (year
== ctl
->reform_year
1116 && month
== REFORMATION_MONTH
&& 13 < day
)) {
1117 return ((int64_t) year
+ (year
/ 4)
1118 - (year
/ 100) + (year
/ 400)
1119 + reform
[month
- 1] + day
) % DAYS_IN_WEEK
;
1121 if (year
< ctl
->reform_year
1122 || (year
== ctl
->reform_year
&& month
< REFORMATION_MONTH
)
1123 || (year
== ctl
->reform_year
&& month
== REFORMATION_MONTH
&& day
< 3))
1124 return ((int64_t) year
+ year
/ 4 + old
[month
- 1] + day
)
1131 * return the week number of a given date, 1..54.
1132 * Supports ISO-8601 and North American modes.
1133 * Day may be given as Julian day of the year mode, in which
1134 * case the month is disregarded entirely.
1136 static int week_number(int day
, int month
, int32_t year
, const struct cal_control
*ctl
)
1139 const int wday
= day_in_week(ctl
, 1, JANUARY
, year
);
1141 if (ctl
->weektype
& WEEK_NUM_ISO
)
1142 fday
= wday
+ (wday
>= FRIDAY
? -2 : 5);
1144 /* WEEK_NUM_US: Jan 1 is always First week, that may
1145 * begin previous year. That means there is very seldom
1146 * more than 52 weeks, */
1149 /* For julian dates the month can be set to 1, the global julian
1150 * variable cannot be relied upon here, because we may recurse
1151 * internally for 31.12. which would not work. */
1152 if (day
> DAYS_IN_MONTH
)
1155 yday
= day_in_year(ctl
, day
, month
, year
);
1156 if (year
== ctl
->reform_year
&& yday
>= YDAY_AFTER_MISSING
)
1157 fday
-= NUMBER_MISSING_DAYS
;
1159 /* Last year is last year */
1160 if (yday
+ fday
< DAYS_IN_WEEK
)
1161 return week_number(31, DECEMBER
, year
- 1, ctl
);
1163 /* Or it could be part of the next year. The reformation year had less
1164 * days than 365 making this check invalid, but reformation year ended
1165 * on Sunday and in week 51, so it's ok here. */
1166 if (ctl
->weektype
== WEEK_NUM_ISO
&& yday
>= 363
1167 && day_in_week(ctl
, day
, month
, year
) >= MONDAY
1168 && day_in_week(ctl
, day
, month
, year
) <= WEDNESDAY
1169 && day_in_week(ctl
, 31, DECEMBER
, year
) >= MONDAY
1170 && day_in_week(ctl
, 31, DECEMBER
, year
) <= WEDNESDAY
)
1171 return week_number(1, JANUARY
, year
+ 1, ctl
);
1173 return (yday
+ fday
) / DAYS_IN_WEEK
;
1178 * return the yday of the first day in a given week inside
1179 * the given year. This may be something other than Monday
1180 * for ISO-8601 modes. For North American numbering this
1181 * always returns a Sunday.
1183 static int week_to_day(const struct cal_control
*ctl
)
1187 wday
= day_in_week(ctl
, 1, JANUARY
, ctl
->req
.year
);
1188 yday
= ctl
->req
.week
* DAYS_IN_WEEK
- wday
;
1190 if (ctl
->req
.year
== ctl
->reform_year
&& yday
>= YDAY_AFTER_MISSING
)
1191 yday
+= NUMBER_MISSING_DAYS
;
1193 if (ctl
->weektype
& WEEK_NUM_ISO
)
1194 yday
-= (wday
>= FRIDAY
? -2 : 5);
1196 yday
-= 6; /* WEEK_NUM_US */
1204 * Center string, handling multibyte characters appropriately.
1205 * In addition if the string is too large for the width it's truncated.
1206 * The number of trailing spaces may be 1 less than the number of leading spaces.
1208 static int center_str(const char* src
, char* dest
,
1209 size_t dest_size
, size_t width
)
1211 return mbsalign(src
, dest
, dest_size
, &width
,
1212 MBS_ALIGN_CENTER
, MBA_UNIBYTE_FALLBACK
);
1215 static void center(const char *str
, size_t len
, int separate
)
1217 char lineout
[FMT_ST_CHARS
];
1219 center_str(str
, lineout
, ARRAY_SIZE(lineout
), len
);
1220 fputs(lineout
, stdout
);
1223 printf("%*s", separate
, "");
1225 static int left_str(const char* src
, char* dest
,
1226 size_t dest_size
, size_t width
)
1228 return mbsalign(src
, dest
, dest_size
, &width
,
1229 MBS_ALIGN_LEFT
, MBA_UNIBYTE_FALLBACK
);
1232 static void left(const char *str
, size_t len
, int separate
)
1234 char lineout
[FMT_ST_CHARS
];
1236 left_str(str
, lineout
, sizeof(lineout
), len
);
1237 fputs(lineout
, stdout
);
1240 printf("%*s", separate
, "");
1243 static int parse_reform_year(const char *reform_year
)
1252 struct reform years
[] = {
1253 {"gregorian", GREGORIAN
},
1259 for (i
= 0; i
< ARRAY_SIZE(years
); i
++) {
1260 if (strcasecmp(reform_year
, years
[i
].name
) == 0)
1261 return years
[i
].val
;
1263 errx(EXIT_FAILURE
, "invalid --reform value: '%s'", reform_year
);
1266 static void __attribute__((__noreturn__
)) usage(void)
1270 fputs(USAGE_HEADER
, out
);
1271 fprintf(out
, _(" %s [options] [[[day] month] year]\n"), program_invocation_short_name
);
1272 fprintf(out
, _(" %s [options] <timestamp|monthname>\n"), program_invocation_short_name
);
1274 fputs(USAGE_SEPARATOR
, out
);
1275 fputs(_("Display a calendar, or some part of it.\n"), out
);
1276 fputs(_("Without any arguments, display the current month.\n"), out
);
1278 fputs(USAGE_OPTIONS
, out
);
1279 fputs(_(" -1, --one show only a single month (default)\n"), out
);
1280 fputs(_(" -3, --three show three months spanning the date\n"), out
);
1281 fputs(_(" -n, --months <num> show num months starting with date's month\n"), out
);
1282 fputs(_(" -S, --span span the date when displaying multiple months\n"), out
);
1283 fputs(_(" -s, --sunday Sunday as first day of week\n"), out
);
1284 fputs(_(" -m, --monday Monday as first day of week\n"), out
);
1285 fputs(_(" -j, --julian use day-of-year for all calendars\n"), out
);
1286 fputs(_(" --reform <val> Gregorian reform date (1752|gregorian|iso|julian)\n"), out
);
1287 fputs(_(" --iso alias for --reform=iso\n"), out
);
1288 fputs(_(" -y, --year show the whole year\n"), out
);
1289 fputs(_(" -Y, --twelve show the next twelve months\n"), out
);
1290 fputs(_(" -w, --week[=<num>] show US or ISO-8601 week numbers\n"), out
);
1291 fputs(_(" -v, --vertical show day vertically instead of line\n"), out
);
1292 fputs(_(" -c, --columns <width> amount of columns to use\n"), out
);
1294 _(" --color[=<when>] colorize messages (%s, %s or %s)\n"), "auto", "always", "never");
1296 " %s\n", USAGE_COLORS_DEFAULT
);
1298 fputs(USAGE_SEPARATOR
, out
);
1299 fprintf(out
, USAGE_HELP_OPTIONS(23));
1300 fprintf(out
, USAGE_MAN_TAIL("cal(1)"));