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"
80 #define DOY_MONTH_WIDTH 27 /* -j month width */
81 #define DOM_MONTH_WIDTH 20 /* month width */
83 static int has_term
= 0;
84 static const char *Senter
= "", *Sexit
= ""; /* enter and exit standout mode */
86 #if defined(HAVE_LIBNCURSES) || defined(HAVE_LIBNCURSESW)
87 # if defined(HAVE_NCURSESW_TERM_H)
88 # include <ncursesw/term.h>
89 # elif defined(HAVE_NCURSES_TERM_H)
90 # include <ncurses/term.h>
91 # elif defined(HAVE_TERM_H)
96 static int setup_terminal(char *term
97 #if !defined(HAVE_LIBNCURSES) && !defined(HAVE_LIBNCURSESW)
98 __attribute__((__unused__
))
102 #if defined(HAVE_LIBNCURSES) || defined(HAVE_LIBNCURSESW)
105 if (setupterm(term
, STDOUT_FILENO
, &ret
) != 0 || ret
!= 1)
111 static void my_putstring(const char *s
)
113 #if defined(HAVE_LIBNCURSES) || defined(HAVE_LIBNCURSESW)
121 static const char *my_tgetstr(char *ss
122 #if !defined(HAVE_LIBNCURSES) && !defined(HAVE_LIBNCURSESW)
123 __attribute__((__unused__
))
127 const char *ret
= NULL
;
129 #if defined(HAVE_LIBNCURSES) || defined(HAVE_LIBNCURSESW)
133 if (!ret
|| ret
== (char *)-1)
138 #include "widechar.h"
141 GREGORIAN
= INT32_MIN
,
144 DEFAULT_REFORM_YEAR
= 1752,
175 #define REFORMATION_MONTH SEPTEMBER
176 #define NUMBER_MISSING_DAYS 11 /* 11 day correction */
177 #define YDAY_AFTER_MISSING 258 /* 14th in Sep 1752 */
179 #define MONTHS_IN_YEAR DECEMBER
180 #define DAYS_IN_MONTH 31
181 #define MAXDAYS 42 /* slots in a month array */
182 #define SPACE -1 /* used in day array */
184 #define SMALLEST_YEAR 1
186 #define DAY_LEN 3 /* 3 spaces per day */
187 #define WEEK_LEN (DAYS_IN_WEEK * DAY_LEN)
188 #define MONTHS_IN_YEAR_ROW 3 /* month columns in year view */
191 #define FMT_ST_CHARS 300 /* 90 suffices in most locales */
193 static const int days_in_month
[2][13] = {
194 {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
195 {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
199 WEEK_NUM_DISABLED
= 0,
205 /* utf-8 can have up to 6 bytes per char; and an extra byte for ending \0 */
206 static char day_headings
[(WEEK_LEN
+ 1) * 6 + 1];
217 const char *full_month
[MONTHS_IN_YEAR
]; /* month names */
218 const char *abbr_month
[MONTHS_IN_YEAR
]; /* abbreviated month names */
220 int reform_year
; /* Gregorian reform year */
221 int colormode
; /* day and week number highlight */
222 int num_months
; /* number of requested months */
223 int span_months
; /* span the date */
224 int months_in_row
; /* number of months horizontally in print out */
225 int weekstart
; /* day the week starts, often Sun or Mon */
226 int weektype
; /* WEEK_TYPE_{NONE,ISO,US} */
227 size_t day_width
; /* day width in characters in printout */
228 size_t week_width
; /* 7 * day_width + possible week num */
229 int gutter_width
; /* spaces in between horizontal month outputs */
230 struct cal_request req
; /* the times user is interested */
231 unsigned int julian
:1, /* julian output */
232 header_year
:1, /* print year number */
233 header_hint
:1; /* does month name + year need two lines to fit */
237 int days
[MAXDAYS
]; /* the day numbers, or SPACE */
238 int weeks
[MAXDAYS
/ DAYS_IN_WEEK
];
241 struct cal_month
*next
;
244 /* function prototypes */
245 static int leap_year(const struct cal_control
*ctl
, int32_t year
);
246 static int monthname_to_number(struct cal_control
*ctl
, const char *name
);
247 static void headers_init(struct cal_control
*ctl
);
248 static void cal_fill_month(struct cal_month
*month
, const struct cal_control
*ctl
);
249 static void cal_output_header(struct cal_month
*month
, const struct cal_control
*ctl
);
250 static void cal_output_months(struct cal_month
*month
, const struct cal_control
*ctl
);
251 static void monthly(const struct cal_control
*ctl
);
252 static void yearly(const struct cal_control
*ctl
);
253 static int day_in_year(const struct cal_control
*ctl
, int day
,
254 int month
, int32_t year
);
255 static int day_in_week(const struct cal_control
*ctl
, int day
,
256 int month
, int32_t year
);
257 static int week_number(int day
, int month
, int32_t year
, const struct cal_control
*ctl
);
258 static int week_to_day(const struct cal_control
*ctl
);
259 static int center_str(const char *src
, char *dest
, size_t dest_size
, size_t width
);
260 static void center(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
;
287 int ch
= 0, yflag
= 0, Yflag
= 0;
289 static struct cal_control ctl
= {
290 .reform_year
= DEFAULT_REFORM_YEAR
,
293 .colormode
= UL_COLORMODE_UNDEF
,
294 .weektype
= WEEK_NUM_DISABLED
,
295 .day_width
= DAY_LEN
,
302 OPT_COLOR
= CHAR_MAX
+ 1,
307 static const struct option longopts
[] = {
308 {"one", no_argument
, NULL
, '1'},
309 {"three", no_argument
, NULL
, '3'},
310 {"sunday", no_argument
, NULL
, 's'},
311 {"monday", no_argument
, NULL
, 'm'},
312 {"julian", no_argument
, NULL
, 'j'},
313 {"months", required_argument
, NULL
, 'n'},
314 {"span", no_argument
, NULL
, 'S'},
315 {"year", no_argument
, NULL
, 'y'},
316 {"week", optional_argument
, NULL
, 'w'},
317 {"color", optional_argument
, NULL
, OPT_COLOR
},
318 {"reform", required_argument
, NULL
, OPT_REFORM
},
319 {"iso", no_argument
, NULL
, OPT_ISO
},
320 {"version", no_argument
, NULL
, 'V'},
321 {"twelve", no_argument
, NULL
, 'Y'},
322 {"help", no_argument
, NULL
, 'h'},
326 static const ul_excl_t excl
[] = { /* rows and cols in ASCII order */
330 int excl_st
[ARRAY_SIZE(excl
)] = UL_EXCL_STATUS_INIT
;
332 setlocale(LC_ALL
, "");
333 bindtextdomain(PACKAGE
, LOCALEDIR
);
335 close_stdout_atexit();
337 term
= getenv("TERM");
339 has_term
= setup_terminal(term
) == 0;
341 Senter
= my_tgetstr("smso");
342 Sexit
= my_tgetstr("rmso");
347 * The traditional Unix cal utility starts the week at Sunday,
348 * while ISO 8601 starts at Monday. We read the start day from
349 * the locale database, which can be overridden with the
350 * -s (Sunday) or -m (Monday) options.
352 #if HAVE_DECL__NL_TIME_WEEK_1STDAY
354 * You need to use 2 locale variables to get the first day of the week.
355 * This is needed to support first_weekday=2 and first_workday=1 for
356 * the rare case where working days span across 2 weeks.
357 * This shell script shows the combinations and calculations involved:
359 * for LANG in en_US ru_RU fr_FR csb_PL POSIX; do
360 * printf "%s:\t%s + %s -1 = " $LANG $(locale week-1stday first_weekday)
361 * date -d"$(locale week-1stday) +$(($(locale first_weekday)-1))day" +%w
364 * en_US: 19971130 + 1 -1 = 0 #0 = sunday
365 * ru_RU: 19971130 + 2 -1 = 1
366 * fr_FR: 19971201 + 1 -1 = 1
367 * csb_PL: 19971201 + 2 -1 = 2
368 * POSIX: 19971201 + 7 -1 = 0
372 union { unsigned int word
; char *string
; } val
;
373 val
.string
= nl_langinfo(_NL_TIME_WEEK_1STDAY
);
376 wfd
= day_in_week(&ctl
, wfd
% 100, (wfd
/ 100) % 100,
378 ctl
.weekstart
= (wfd
+ *nl_langinfo(_NL_TIME_FIRST_WEEKDAY
) - 1) % DAYS_IN_WEEK
;
381 while ((ch
= getopt_long(argc
, argv
, "13mjn:sSywYVh", longopts
, NULL
)) != -1) {
383 err_exclusive_options(ch
, longopts
, excl
, excl_st
);
394 ctl
.weekstart
= SUNDAY
; /* default */
397 ctl
.weekstart
= MONDAY
;
401 ctl
.day_width
= DAY_LEN
+ 1;
410 ctl
.num_months
= strtou32_or_err(optarg
,
411 _("invalid month argument"));
418 ctl
.req
.week
= strtos32_or_err(optarg
,
419 _("invalid week argument"));
420 if (ctl
.req
.week
< 1 || 54 < ctl
.req
.week
)
421 errx(EXIT_FAILURE
,_("illegal week value: use 1-54"));
423 ctl
.weektype
= WEEK_NUM_US
; /* default per weekstart */
426 ctl
.colormode
= UL_COLORMODE_AUTO
;
428 ctl
.colormode
= colormode_or_err(optarg
,
429 _("unsupported color mode"));
432 ctl
.reform_year
= parse_reform_year(optarg
);
435 ctl
.reform_year
= ISO
;
438 print_version(EXIT_SUCCESS
);
442 errtryhelp(EXIT_FAILURE
);
450 ctl
.weektype
= ctl
.req
.week
& WEEK_NUM_MASK
;
451 ctl
.weektype
|= (ctl
.weekstart
== MONDAY
? WEEK_NUM_ISO
: WEEK_NUM_US
);
452 ctl
.week_width
= (ctl
.day_width
* DAYS_IN_WEEK
) + WNUM_LEN
;
454 ctl
.week_width
= ctl
.day_width
* DAYS_IN_WEEK
;
456 * The day_width includes the space between days,
457 * as there is no leading space, remove 1
461 if (argc
== 1 && !isdigit_string(*argv
)) {
463 /* cal <timestamp> */
464 if (parse_timestamp(*argv
, &x
) == 0)
465 now
= (time_t) (x
/ 1000000);
466 /* cal <monthname> */
467 else if ((ctl
.req
.month
= monthname_to_number(&ctl
, *argv
)) > 0)
468 cal_time(&now
); /* this year */
470 errx(EXIT_FAILURE
, _("failed to parse timestamp or unknown month name: %s"), *argv
);
475 localtime_r(&now
, &local_time
);
479 ctl
.req
.day
= strtos32_or_err(*argv
++, _("illegal day value"));
480 if (ctl
.req
.day
< 1 || DAYS_IN_MONTH
< ctl
.req
.day
)
481 errx(EXIT_FAILURE
, _("illegal day value: use 1-%d"), DAYS_IN_MONTH
);
485 ctl
.req
.month
= strtos32_or_err(*argv
++, _("illegal month value: use 1-12"));
487 ctl
.req
.month
= monthname_to_number(&ctl
, *argv
);
488 if (ctl
.req
.month
< 0)
489 errx(EXIT_FAILURE
, _("unknown month name: %s"), *argv
);
492 if (ctl
.req
.month
< 1 || MONTHS_IN_YEAR
< ctl
.req
.month
)
493 errx(EXIT_FAILURE
, _("illegal month value: use 1-12"));
496 ctl
.req
.year
= strtos32_or_err(*argv
++, _("illegal year value"));
497 if (ctl
.req
.year
< SMALLEST_YEAR
)
498 errx(EXIT_FAILURE
, _("illegal year value: use positive integer"));
499 if (ctl
.req
.year
== JULIAN
)
500 errx(EXIT_FAILURE
, _("illegal year value"));
502 int dm
= days_in_month
[leap_year(&ctl
, ctl
.req
.year
)]
504 if (ctl
.req
.day
> dm
)
505 errx(EXIT_FAILURE
, _("illegal day value: use 1-%d"), dm
);
506 ctl
.req
.day
= day_in_year(&ctl
, ctl
.req
.day
,
507 ctl
.req
.month
, ctl
.req
.year
);
508 } else if ((int32_t) (local_time
.tm_year
+ 1900) == ctl
.req
.year
) {
509 ctl
.req
.day
= local_time
.tm_yday
+ 1;
511 if (!ctl
.req
.month
&& !ctl
.req
.week
) {
512 ctl
.req
.month
= local_time
.tm_mon
+ 1;
518 ctl
.req
.day
= local_time
.tm_yday
+ 1;
519 ctl
.req
.year
= local_time
.tm_year
+ 1900;
521 ctl
.req
.month
= local_time
.tm_mon
+ 1;
524 warnx(_("bad usage"));
525 errtryhelp(EXIT_FAILURE
);
528 if (0 < ctl
.req
.week
) {
529 int yday
= week_to_day(&ctl
);
530 int leap
= leap_year(&ctl
, ctl
.req
.year
);
534 errx(EXIT_FAILURE
, _("illegal week value: year %d "
535 "doesn't have week %d"),
536 ctl
.req
.year
, ctl
.req
.week
);
537 while (m
<= DECEMBER
&& yday
> days_in_month
[leap
][m
])
538 yday
-= days_in_month
[leap
][m
++];
539 if (DECEMBER
< m
&& ctl
.weektype
& WEEK_NUM_ISO
) {
540 /* In some years (e.g. 2010 in ISO mode) it's possible
541 * to have a remnant of week 53 starting the year yet
542 * the year in question ends during 52, in this case
543 * we're assuming that early remnant is being referred
544 * to if 53 is given as argument. */
545 if (ctl
.req
.week
!= week_number(31, DECEMBER
, ctl
.req
.year
- 1, &ctl
))
547 _("illegal week value: year %d "
548 "doesn't have week %d"),
549 ctl
.req
.year
, ctl
.req
.week
);
552 ctl
.req
.month
= MONTHS_IN_YEAR
< m
? 1 : m
;
557 if (colors_init(ctl
.colormode
, "cal") == 0) {
559 * If standout mode available (Senter and Sexit are set) and
560 * user or terminal-colors.d do not disable colors than
561 * ignore colors_init().
563 if (*Senter
&& *Sexit
&& colors_mode() != UL_COLORMODE_NEVER
) {
564 /* let use standout mode */
568 Senter
= ""; Sexit
= "";
570 ctl
.weektype
&= ~WEEK_NUM_MASK
;
574 if (yflag
|| Yflag
) {
575 ctl
.gutter_width
= 3;
577 ctl
.num_months
= MONTHS_IN_YEAR
;
579 ctl
.req
.start_month
= 1; /* start from Jan */
580 ctl
.header_year
= 1; /* print year number */
584 if (ctl
.num_months
> 1 && ctl
.months_in_row
== 0) {
585 ctl
.months_in_row
= MONTHS_IN_YEAR_ROW
; /* default */
587 if (isatty(STDOUT_FILENO
)) {
588 int w
, mw
, extra
, new_n
;
590 w
= get_terminal_width(80);
591 mw
= ctl
.julian
? DOY_MONTH_WIDTH
: DOM_MONTH_WIDTH
;
596 extra
= ((w
/ mw
) - 1) * ctl
.gutter_width
;
597 new_n
= (w
- extra
) / mw
;
599 if (new_n
< MONTHS_IN_YEAR_ROW
)
600 ctl
.months_in_row
= new_n
> 0 ? new_n
: 1;
602 } else if (!ctl
.months_in_row
)
603 ctl
.months_in_row
= 1;
606 ctl
.num_months
= 1; /* display at least one month */
616 /* leap year -- account for gregorian reformation in 1752 */
617 static int leap_year(const struct cal_control
*ctl
, int32_t year
)
619 if (year
<= ctl
->reform_year
)
622 return ( !(year
% 4) && (year
% 100) ) || !(year
% 400);
625 static void init_monthnames(struct cal_control
*ctl
)
629 if (ctl
->full_month
[0] != NULL
)
630 return; /* already initialized */
632 for (i
= 0; i
< MONTHS_IN_YEAR
; i
++)
633 ctl
->full_month
[i
] = nl_langinfo(ALTMON_1
+ i
);
636 static void init_abbr_monthnames(struct cal_control
*ctl
)
640 if (ctl
->abbr_month
[0] != NULL
)
641 return; /* already initialized */
643 for (i
= 0; i
< MONTHS_IN_YEAR
; i
++)
644 ctl
->abbr_month
[i
] = nl_langinfo(_NL_ABALTMON_1
+ i
);
647 static int monthname_to_number(struct cal_control
*ctl
, const char *name
)
651 init_monthnames(ctl
);
652 for (i
= 0; i
< MONTHS_IN_YEAR
; i
++)
653 if (strcasecmp(ctl
->full_month
[i
], name
) == 0)
656 init_abbr_monthnames(ctl
);
657 for (i
= 0; i
< MONTHS_IN_YEAR
; i
++)
658 if (strcasecmp(ctl
->abbr_month
[i
], name
) == 0)
664 static void headers_init(struct cal_control
*ctl
)
667 char *cur_dh
= day_headings
;
668 char tmp
[FMT_ST_CHARS
];
671 year_len
= snprintf(tmp
, sizeof(tmp
), "%04d", ctl
->req
.year
);
673 if (year_len
< 0 || (size_t)year_len
>= sizeof(tmp
)) {
674 /* XXX impossible error */
678 for (i
= 0; i
< DAYS_IN_WEEK
; i
++) {
680 wd
= (i
+ ctl
->weekstart
) % DAYS_IN_WEEK
;
683 strcat(cur_dh
++, " ");
684 space_left
= sizeof(day_headings
) - (cur_dh
- day_headings
);
686 if (space_left
<= (ctl
->day_width
- 1))
688 cur_dh
+= center_str(nl_langinfo(ABDAY_1
+ wd
), cur_dh
,
689 space_left
, ctl
->day_width
- 1);
692 init_monthnames(ctl
);
694 for (i
= 0; i
< MONTHS_IN_YEAR
; i
++) {
695 /* The +1 after year_len is space in between month and year. */
696 if (ctl
->week_width
< strlen(ctl
->full_month
[i
]) + year_len
)
697 ctl
->header_hint
= 1;
701 static void cal_fill_month(struct cal_month
*month
, const struct cal_control
*ctl
)
703 int first_week_day
= day_in_week(ctl
, 1, month
->month
, month
->year
);
705 int i
, j
, weeklines
= 0;
708 j
= day_in_year(ctl
, 1, month
->month
, month
->year
);
711 month_days
= j
+ days_in_month
[leap_year(ctl
, month
->year
)][month
->month
];
713 /* True when Sunday is not first day in the output week. */
714 if (ctl
->weekstart
) {
715 first_week_day
-= ctl
->weekstart
;
716 if (first_week_day
< 0)
717 first_week_day
= DAYS_IN_WEEK
- ctl
->weekstart
;
718 month_days
+= ctl
->weekstart
- 1;
721 /* Fill day array. */
722 for (i
= 0; i
< MAXDAYS
; i
++) {
723 if (0 < first_week_day
) {
724 month
->days
[i
] = SPACE
;
728 if (j
< month_days
) {
729 if (month
->year
== ctl
->reform_year
&&
730 month
->month
== REFORMATION_MONTH
&&
731 (j
== 3 || j
== 247))
732 j
+= NUMBER_MISSING_DAYS
;
737 month
->days
[i
] = SPACE
;
741 /* Add week numbers */
743 int weeknum
= week_number(1, month
->month
, month
->year
, ctl
);
744 weeklines
= MAXDAYS
/ DAYS_IN_WEEK
- weeklines
/ DAYS_IN_WEEK
;
745 for (i
= 0; i
< MAXDAYS
/ DAYS_IN_WEEK
; i
++) {
748 weeknum
= week_number(month
->days
[i
* DAYS_IN_WEEK
], month
->month
, month
->year
, ctl
);
749 month
->weeks
[i
] = weeknum
++;
751 month
->weeks
[i
] = SPACE
;
757 static void cal_output_header(struct cal_month
*month
, const struct cal_control
*ctl
)
759 char out
[FMT_ST_CHARS
];
762 if (ctl
->header_hint
|| ctl
->header_year
) {
763 for (i
= month
; i
; i
= i
->next
) {
764 snprintf(out
, sizeof(out
), "%s", ctl
->full_month
[i
->month
- 1]);
765 center(out
, ctl
->week_width
, i
->next
== NULL
? 0 : ctl
->gutter_width
);
767 if (!ctl
->header_year
) {
769 for (i
= month
; i
; i
= i
->next
) {
770 snprintf(out
, sizeof(out
), "%04d", i
->year
);
771 center(out
, ctl
->week_width
, i
->next
== NULL
? 0 : ctl
->gutter_width
);
775 for (i
= month
; i
; i
= i
->next
) {
776 snprintf(out
, sizeof(out
), "%s %04d", ctl
->full_month
[i
->month
- 1], i
->year
);
777 center(out
, ctl
->week_width
, i
->next
== NULL
? 0 : ctl
->gutter_width
);
781 for (i
= month
; i
; i
= i
->next
) {
784 snprintf(out
, sizeof(out
), "%*s%s", (int)ctl
->day_width
- 1, "", day_headings
);
786 snprintf(out
, sizeof(out
), "%*s%s", (int)ctl
->day_width
, "", day_headings
);
789 my_putstring(day_headings
);
790 if (i
->next
!= NULL
) {
791 snprintf(out
, sizeof(out
), "%*s", ctl
->gutter_width
, "");
798 static void cal_output_months(struct cal_month
*month
, const struct cal_control
*ctl
)
800 char out
[FMT_ST_CHARS
];
801 int reqday
, week_line
, d
;
805 for (week_line
= 0; week_line
< MAXDAYS
/ DAYS_IN_WEEK
; week_line
++) {
806 for (i
= month
; i
; i
= i
->next
) {
807 /* Determine the day that should be highlighted. */
809 if (i
->month
== ctl
->req
.month
&& i
->year
== ctl
->req
.year
) {
811 reqday
= ctl
->req
.day
;
813 reqday
= ctl
->req
.day
+ 1 -
814 day_in_year(ctl
, 1, i
->month
,
819 if (0 < i
->weeks
[week_line
]) {
820 if ((ctl
->weektype
& WEEK_NUM_MASK
) ==
822 snprintf(out
, sizeof(out
), "%s%2d%s",
823 Senter
, i
->weeks
[week_line
],
826 snprintf(out
, sizeof(out
), "%2d", i
->weeks
[week_line
]);
828 snprintf(out
, sizeof(out
), "%2s", "");
830 skip
= ctl
->day_width
;
832 /* First day of the week is one char narrower than the other days,
833 * unless week number is printed. */
834 skip
= ctl
->day_width
- 1;
836 for (d
= DAYS_IN_WEEK
* week_line
;
837 d
< DAYS_IN_WEEK
* week_line
+ DAYS_IN_WEEK
; d
++) {
838 if (0 < i
->days
[d
]) {
839 if (reqday
== i
->days
[d
])
840 snprintf(out
, sizeof(out
), "%*s%s%*d%s",
841 skip
- (ctl
->julian
? 3 : 2),
842 "", Senter
, (ctl
->julian
? 3 : 2),
845 snprintf(out
, sizeof(out
), "%*d", skip
, i
->days
[d
]);
847 snprintf(out
, sizeof(out
), "%*s", skip
, "");
849 if (skip
< (int)ctl
->day_width
)
852 if (i
->next
!= NULL
) {
853 snprintf(out
, sizeof(out
), "%*s", ctl
->gutter_width
, "");
862 static void monthly(const struct cal_control
*ctl
)
864 struct cal_month m1
,m2
,m3
, *m
;
865 int i
, rows
, month
= ctl
->req
.start_month
? ctl
->req
.start_month
: ctl
->req
.month
;
866 int32_t year
= ctl
->req
.year
;
868 /* cal -3, cal -Y --span, etc. */
869 if (ctl
->span_months
) {
870 int new_month
= month
- ctl
->num_months
/ 2;
873 year
-= (new_month
/ MONTHS_IN_YEAR
) + 1;
875 if (new_month
> MONTHS_IN_YEAR
)
876 new_month
%= MONTHS_IN_YEAR
;
877 month
= MONTHS_IN_YEAR
- new_month
;
882 m1
.next
= (ctl
->months_in_row
> 1) ? &m2
: NULL
;
883 m2
.next
= (ctl
->months_in_row
> 2) ? &m3
: NULL
;
886 rows
= (ctl
->num_months
- 1) / ctl
->months_in_row
;
887 for (i
= 0; i
< rows
+ 1 ; i
++){
889 switch (ctl
->num_months
% ctl
->months_in_row
){
898 for (m
= &m1
; m
; m
= m
->next
){
901 if (MONTHS_IN_YEAR
< month
) {
905 cal_fill_month(m
, ctl
);
907 cal_output_header(&m1
, ctl
);
908 cal_output_months(&m1
, ctl
);
912 static void yearly(const struct cal_control
*ctl
)
914 char out
[FMT_ST_CHARS
];
917 year_width
= ctl
->months_in_row
* (ctl
->week_width
) +
918 (ctl
->months_in_row
- 1) * ctl
->gutter_width
;
920 if (ctl
->header_year
) {
921 snprintf(out
, sizeof(out
), "%04d", ctl
->req
.year
);
922 center(out
, year_width
, 0);
923 my_putstring("\n\n");
930 * return the 1 based day number within the year
932 static int day_in_year(const struct cal_control
*ctl
,
933 int day
, int month
, int32_t year
)
937 leap
= leap_year(ctl
, year
);
938 for (i
= 1; i
< month
; i
++)
939 day
+= days_in_month
[leap
][i
];
945 * return the 0 based day number for any date from 1 Jan. 1 to
946 * 31 Dec. 9999. Assumes the Gregorian reformation eliminates
947 * 3 Sep. 1752 through 13 Sep. 1752, and returns invalid weekday
948 * during the period of 11 days.
950 static int day_in_week(const struct cal_control
*ctl
, int day
,
951 int month
, int32_t year
)
954 * The magic constants in the reform[] array are, in a simplified
955 * sense, the remaining days after slicing into one week periods the total
956 * days from the beginning of the year to the target month. That is,
957 * weeks + reform[] days gets us to the target month. The exception is,
958 * that for the months past February 'DOY - 1' must be used.
960 * DoY (Day of Year): total days to the target month
962 * Month 1 2 3 4 5 6 7 8 9 10 11 12
963 * DoY 0 31 59 90 120 151 181 212 243 273 304 334
965 * DoY - 1 % 7 - -- 2 5 0 3 5 1 4 6 2 4
966 * reform[] = { 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 };
968 * Note: these calculations are for non leap years.
970 static const int reform
[] = { 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 };
971 static const int old
[] = { 5, 1, 0, 3, 5, 1, 3, 6, 2, 4, 0, 2 };
973 if (year
!= ctl
->reform_year
+ 1)
974 year
-= month
< MARCH
;
976 year
-= (month
< MARCH
) + 14;
977 if (ctl
->reform_year
< year
978 || (year
== ctl
->reform_year
&& REFORMATION_MONTH
< month
)
979 || (year
== ctl
->reform_year
980 && month
== REFORMATION_MONTH
&& 13 < day
)) {
981 return ((int64_t) year
+ (year
/ 4)
982 - (year
/ 100) + (year
/ 400)
983 + reform
[month
- 1] + day
) % DAYS_IN_WEEK
;
985 if (year
< ctl
->reform_year
986 || (year
== ctl
->reform_year
&& month
< REFORMATION_MONTH
)
987 || (year
== ctl
->reform_year
&& month
== REFORMATION_MONTH
&& day
< 3))
988 return ((int64_t) year
+ year
/ 4 + old
[month
- 1] + day
)
995 * return the week number of a given date, 1..54.
996 * Supports ISO-8601 and North American modes.
997 * Day may be given as Julian day of the year mode, in which
998 * case the month is disregarded entirely.
1000 static int week_number(int day
, int month
, int32_t year
, const struct cal_control
*ctl
)
1003 const int wday
= day_in_week(ctl
, 1, JANUARY
, year
);
1005 if (ctl
->weektype
& WEEK_NUM_ISO
)
1006 fday
= wday
+ (wday
>= FRIDAY
? -2 : 5);
1008 /* WEEK_NUM_US: Jan 1 is always First week, that may
1009 * begin previous year. That means there is very seldom
1010 * more than 52 weeks, */
1013 /* For julian dates the month can be set to 1, the global julian
1014 * variable cannot be relied upon here, because we may recurse
1015 * internally for 31.12. which would not work. */
1016 if (day
> DAYS_IN_MONTH
)
1019 yday
= day_in_year(ctl
, day
, month
, year
);
1020 if (year
== ctl
->reform_year
&& yday
>= YDAY_AFTER_MISSING
)
1021 fday
-= NUMBER_MISSING_DAYS
;
1023 /* Last year is last year */
1024 if (yday
+ fday
< DAYS_IN_WEEK
)
1025 return week_number(31, DECEMBER
, year
- 1, ctl
);
1027 /* Or it could be part of the next year. The reformation year had less
1028 * days than 365 making this check invalid, but reformation year ended
1029 * on Sunday and in week 51, so it's ok here. */
1030 if (ctl
->weektype
== WEEK_NUM_ISO
&& yday
>= 363
1031 && day_in_week(ctl
, day
, month
, year
) >= MONDAY
1032 && day_in_week(ctl
, day
, month
, year
) <= WEDNESDAY
1033 && day_in_week(ctl
, 31, DECEMBER
, year
) >= MONDAY
1034 && day_in_week(ctl
, 31, DECEMBER
, year
) <= WEDNESDAY
)
1035 return week_number(1, JANUARY
, year
+ 1, ctl
);
1037 return (yday
+ fday
) / DAYS_IN_WEEK
;
1042 * return the yday of the first day in a given week inside
1043 * the given year. This may be something other than Monday
1044 * for ISO-8601 modes. For North American numbering this
1045 * always returns a Sunday.
1047 static int week_to_day(const struct cal_control
*ctl
)
1051 wday
= day_in_week(ctl
, 1, JANUARY
, ctl
->req
.year
);
1052 yday
= ctl
->req
.week
* DAYS_IN_WEEK
- wday
;
1054 if (ctl
->req
.year
== ctl
->reform_year
&& yday
>= YDAY_AFTER_MISSING
)
1055 yday
+= NUMBER_MISSING_DAYS
;
1057 if (ctl
->weektype
& WEEK_NUM_ISO
)
1058 yday
-= (wday
>= FRIDAY
? -2 : 5);
1060 yday
-= 6; /* WEEK_NUM_US */
1068 * Center string, handling multibyte characters appropriately.
1069 * In addition if the string is too large for the width it's truncated.
1070 * The number of trailing spaces may be 1 less than the number of leading spaces.
1072 static int center_str(const char* src
, char* dest
,
1073 size_t dest_size
, size_t width
)
1075 return mbsalign(src
, dest
, dest_size
, &width
,
1076 MBS_ALIGN_CENTER
, MBA_UNIBYTE_FALLBACK
);
1079 static void center(const char *str
, size_t len
, int separate
)
1081 char lineout
[FMT_ST_CHARS
];
1083 center_str(str
, lineout
, ARRAY_SIZE(lineout
), len
);
1084 my_putstring(lineout
);
1087 snprintf(lineout
, sizeof(lineout
), "%*s", separate
, "");
1088 my_putstring(lineout
);
1092 static int parse_reform_year(const char *reform_year
)
1101 struct reform years
[] = {
1102 {"gregorian", GREGORIAN
},
1108 for (i
= 0; i
< ARRAY_SIZE(years
); i
++) {
1109 if (strcasecmp(reform_year
, years
[i
].name
) == 0) {
1110 return years
[i
].val
;
1113 errx(EXIT_FAILURE
, "invalid --reform value: '%s'", reform_year
);
1116 static void __attribute__((__noreturn__
)) usage(void)
1119 fputs(USAGE_HEADER
, out
);
1120 fprintf(out
, _(" %s [options] [[[day] month] year]\n"), program_invocation_short_name
);
1121 fprintf(out
, _(" %s [options] <timestamp|monthname>\n"), program_invocation_short_name
);
1123 fputs(USAGE_SEPARATOR
, out
);
1124 fputs(_("Display a calendar, or some part of it.\n"), out
);
1125 fputs(_("Without any arguments, display the current month.\n"), out
);
1127 fputs(USAGE_OPTIONS
, out
);
1128 fputs(_(" -1, --one show only a single month (default)\n"), out
);
1129 fputs(_(" -3, --three show three months spanning the date\n"), out
);
1130 fputs(_(" -n, --months <num> show num months starting with date's month\n"), out
);
1131 fputs(_(" -S, --span span the date when displaying multiple months\n"), out
);
1132 fputs(_(" -s, --sunday Sunday as first day of week\n"), out
);
1133 fputs(_(" -m, --monday Monday as first day of week\n"), out
);
1134 fputs(_(" -j, --julian use day-of-year for all calendars\n"), out
);
1135 fputs(_(" --reform <val> Gregorian reform date (1752|gregorian|iso|julian)\n"), out
);
1136 fputs(_(" --iso alias for --reform=iso\n"), out
);
1137 fputs(_(" -y, --year show the whole year\n"), out
);
1138 fputs(_(" -Y, --twelve show the next twelve months\n"), out
);
1139 fputs(_(" -w, --week[=<num>] show US or ISO-8601 week numbers\n"), out
);
1141 _(" --color[=<when>] colorize messages (%s, %s or %s)\n"), "auto", "always", "never");
1143 " %s\n", USAGE_COLORS_DEFAULT
);
1145 fputs(USAGE_SEPARATOR
, out
);
1146 printf(USAGE_HELP_OPTIONS(23));
1147 printf(USAGE_MAN_TAIL("cal(1)"));