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"
79 static int has_term
= 0;
80 static const char *Senter
= "", *Sexit
= ""; /* enter and exit standout mode */
82 #if defined(HAVE_LIBNCURSES) || defined(HAVE_LIBNCURSESW)
83 # if defined(HAVE_NCURSESW_TERM_H)
84 # include <ncursesw/term.h>
85 # elif defined(HAVE_NCURSES_TERM_H)
86 # include <ncurses/term.h>
87 # elif defined(HAVE_TERM_H)
92 static int setup_terminal(char *term
93 #if !defined(HAVE_LIBNCURSES) && !defined(HAVE_LIBNCURSESW)
94 __attribute__((__unused__
))
98 #if defined(HAVE_LIBNCURSES) || defined(HAVE_LIBNCURSESW)
101 if (setupterm(term
, STDOUT_FILENO
, &ret
) != 0 || ret
!= 1)
107 static void my_putstring(char *s
)
109 #if defined(HAVE_LIBNCURSES) || defined(HAVE_LIBNCURSESW)
117 static const char *my_tgetstr(char *ss
118 #if !defined(HAVE_LIBNCURSES) && !defined(HAVE_LIBNCURSESW)
119 __attribute__((__unused__
))
123 const char *ret
= NULL
;
125 #if defined(HAVE_LIBNCURSES) || defined(HAVE_LIBNCURSESW)
129 if (!ret
|| ret
== (char *)-1)
134 #include "widechar.h"
137 GREGORIAN
= INT32_MIN
,
140 DEFAULT_REFORM_YEAR
= 1752,
171 #define REFORMATION_MONTH SEPTEMBER
172 #define NUMBER_MISSING_DAYS 11 /* 11 day correction */
173 #define YDAY_AFTER_MISSING 258 /* 14th in Sep 1752 */
175 #define MONTHS_IN_YEAR DECEMBER
176 #define DAYS_IN_MONTH 31
177 #define MAXDAYS 42 /* slots in a month array */
178 #define SPACE -1 /* used in day array */
180 #define SMALLEST_YEAR 1
182 #define DAY_LEN 3 /* 3 spaces per day */
183 #define WEEK_LEN (DAYS_IN_WEEK * DAY_LEN)
184 #define MONTHS_IN_YEAR_ROW 3 /* month columns in year view */
187 #define FMT_ST_CHARS 300 /* 90 suffices in most locales */
189 static const int days_in_month
[2][13] = {
190 {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
191 {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
195 WEEK_NUM_DISABLED
= 0,
201 /* utf-8 can have up to 6 bytes per char; and an extra byte for ending \0 */
202 static char day_headings
[(WEEK_LEN
+ 1) * 6 + 1];
213 const char *full_month
[MONTHS_IN_YEAR
]; /* month names */
214 const char *abbr_month
[MONTHS_IN_YEAR
]; /* abbreviated month names */
216 int reform_year
; /* Gregorian reform year */
217 int colormode
; /* day and week number highlight */
218 int num_months
; /* number of requested months */
219 int span_months
; /* span the date */
220 int months_in_row
; /* number of months horizontally in print out */
221 int weekstart
; /* day the week starts, often Sun or Mon */
222 int weektype
; /* WEEK_TYPE_{NONE,ISO,US} */
223 size_t day_width
; /* day width in characters in printout */
224 size_t week_width
; /* 7 * day_width + possible week num */
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 */
233 int days
[MAXDAYS
]; /* the day numbers, or SPACE */
234 int weeks
[MAXDAYS
/ DAYS_IN_WEEK
];
237 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 headers_init(struct cal_control
*ctl
);
244 static void cal_fill_month(struct cal_month
*month
, const struct cal_control
*ctl
);
245 static void cal_output_header(struct cal_month
*month
, const struct cal_control
*ctl
);
246 static void cal_output_months(struct cal_month
*month
, const struct cal_control
*ctl
);
247 static void monthly(const struct cal_control
*ctl
);
248 static void yearly(const struct cal_control
*ctl
);
249 static int day_in_year(const struct cal_control
*ctl
, int day
,
250 int month
, int32_t year
);
251 static int day_in_week(const struct cal_control
*ctl
, int day
,
252 int month
, int32_t year
);
253 static int week_number(int day
, int month
, int32_t year
, const struct cal_control
*ctl
);
254 static int week_to_day(const struct cal_control
*ctl
);
255 static int center_str(const char *src
, char *dest
, size_t dest_size
, size_t width
);
256 static void center(const char *str
, size_t len
, int separate
);
257 static int parse_reform_year(const char *reform_year
);
258 static void __attribute__((__noreturn__
)) usage(void);
260 int main(int argc
, char **argv
)
262 struct tm
*local_time
;
265 int ch
= 0, yflag
= 0, Yflag
= 0;
267 static struct cal_control ctl
= {
268 .reform_year
= DEFAULT_REFORM_YEAR
,
270 .num_months
= 1, /* default is "cal -1" */
272 .colormode
= UL_COLORMODE_UNDEF
,
273 .weektype
= WEEK_NUM_DISABLED
,
274 .day_width
= DAY_LEN
,
281 OPT_COLOR
= CHAR_MAX
+ 1,
286 static const struct option longopts
[] = {
287 {"one", no_argument
, NULL
, '1'},
288 {"three", no_argument
, NULL
, '3'},
289 {"sunday", no_argument
, NULL
, 's'},
290 {"monday", no_argument
, NULL
, 'm'},
291 {"julian", no_argument
, NULL
, 'j'},
292 {"months", required_argument
, NULL
, 'n'},
293 {"span", no_argument
, NULL
, 'S'},
294 {"year", no_argument
, NULL
, 'y'},
295 {"week", optional_argument
, NULL
, 'w'},
296 {"color", optional_argument
, NULL
, OPT_COLOR
},
297 {"reform", required_argument
, NULL
, OPT_REFORM
},
298 {"iso", no_argument
, NULL
, OPT_ISO
},
299 {"version", no_argument
, NULL
, 'V'},
300 {"twelve", no_argument
, NULL
, 'Y'},
301 {"help", no_argument
, NULL
, 'h'},
305 static const ul_excl_t excl
[] = { /* rows and cols in ASCII order */
309 int excl_st
[ARRAY_SIZE(excl
)] = UL_EXCL_STATUS_INIT
;
311 setlocale(LC_ALL
, "");
312 bindtextdomain(PACKAGE
, LOCALEDIR
);
314 atexit(close_stdout
);
316 term
= getenv("TERM");
318 has_term
= setup_terminal(term
) == 0;
320 Senter
= my_tgetstr("smso");
321 Sexit
= my_tgetstr("rmso");
326 * The traditional Unix cal utility starts the week at Sunday,
327 * while ISO 8601 starts at Monday. We read the start day from
328 * the locale database, which can be overridden with the
329 * -s (Sunday) or -m (Monday) options.
331 #if HAVE_DECL__NL_TIME_WEEK_1STDAY
333 * You need to use 2 locale variables to get the first day of the week.
334 * This is needed to support first_weekday=2 and first_workday=1 for
335 * the rare case where working days span across 2 weeks.
336 * This shell script shows the combinations and calculations involved:
338 * for LANG in en_US ru_RU fr_FR csb_PL POSIX; do
339 * printf "%s:\t%s + %s -1 = " $LANG $(locale week-1stday first_weekday)
340 * date -d"$(locale week-1stday) +$(($(locale first_weekday)-1))day" +%w
343 * en_US: 19971130 + 1 -1 = 0 #0 = sunday
344 * ru_RU: 19971130 + 2 -1 = 1
345 * fr_FR: 19971201 + 1 -1 = 1
346 * csb_PL: 19971201 + 2 -1 = 2
347 * POSIX: 19971201 + 7 -1 = 0
351 union { unsigned int word
; char *string
; } val
;
352 val
.string
= nl_langinfo(_NL_TIME_WEEK_1STDAY
);
355 wfd
= day_in_week(&ctl
, wfd
% 100, (wfd
/ 100) % 100,
357 ctl
.weekstart
= (wfd
+ *nl_langinfo(_NL_TIME_FIRST_WEEKDAY
) - 1) % DAYS_IN_WEEK
;
360 while ((ch
= getopt_long(argc
, argv
, "13mjn:sSywYVh", longopts
, NULL
)) != -1) {
362 err_exclusive_options(ch
, longopts
, excl
, excl_st
);
371 ctl
.months_in_row
= 3;
374 ctl
.weekstart
= SUNDAY
; /* default */
377 ctl
.weekstart
= MONDAY
;
381 ctl
.day_width
= DAY_LEN
+ 1;
390 ctl
.num_months
= strtou32_or_err(optarg
,
391 _("invalid month argument"));
398 ctl
.req
.week
= strtos32_or_err(optarg
,
399 _("invalid week argument"));
400 if (ctl
.req
.week
< 1 || 54 < ctl
.req
.week
)
401 errx(EXIT_FAILURE
,_("illegal week value: use 1-54"));
403 ctl
.weektype
= WEEK_NUM_US
; /* default per weekstart */
406 ctl
.colormode
= UL_COLORMODE_AUTO
;
408 ctl
.colormode
= colormode_or_err(optarg
,
409 _("unsupported color mode"));
412 ctl
.reform_year
= parse_reform_year(optarg
);
415 ctl
.reform_year
= ISO
;
418 printf(UTIL_LINUX_VERSION
);
423 errtryhelp(EXIT_FAILURE
);
431 ctl
.weektype
= ctl
.req
.week
& WEEK_NUM_MASK
;
432 ctl
.weektype
|= (ctl
.weekstart
== MONDAY
? WEEK_NUM_ISO
: WEEK_NUM_US
);
433 ctl
.week_width
= (ctl
.day_width
* DAYS_IN_WEEK
) + WNUM_LEN
;
435 ctl
.week_width
= ctl
.day_width
* DAYS_IN_WEEK
;
437 if (argc
== 1 && !isdigit_string(*argv
)) {
439 /* cal <timestamp> */
440 if (parse_timestamp(*argv
, &x
) == 0)
441 now
= (time_t) (x
/ 1000000);
442 /* cal <monthname> */
443 else if ((ctl
.req
.month
= monthname_to_number(&ctl
, *argv
)) > 0)
444 time(&now
); /* this year */
446 errx(EXIT_FAILURE
, _("failed to parse timestamp or unknown month name: %s"), *argv
);
451 local_time
= localtime(&now
);
455 ctl
.req
.day
= strtos32_or_err(*argv
++, _("illegal day value"));
456 if (ctl
.req
.day
< 1 || DAYS_IN_MONTH
< ctl
.req
.day
)
457 errx(EXIT_FAILURE
, _("illegal day value: use 1-%d"), DAYS_IN_MONTH
);
461 ctl
.req
.month
= strtos32_or_err(*argv
++, _("illegal month value: use 1-12"));
463 ctl
.req
.month
= monthname_to_number(&ctl
, *argv
);
464 if (ctl
.req
.month
< 0)
465 errx(EXIT_FAILURE
, _("unknown month name: %s"), *argv
);
468 if (ctl
.req
.month
< 1 || MONTHS_IN_YEAR
< ctl
.req
.month
)
469 errx(EXIT_FAILURE
, _("illegal month value: use 1-12"));
472 ctl
.req
.year
= strtos32_or_err(*argv
++, _("illegal year value"));
473 if (ctl
.req
.year
< SMALLEST_YEAR
)
474 errx(EXIT_FAILURE
, _("illegal year value: use positive integer"));
475 if (ctl
.req
.year
== JULIAN
)
476 errx(EXIT_FAILURE
, _("illegal year value"));
478 int dm
= days_in_month
[leap_year(&ctl
, ctl
.req
.year
)]
480 if (ctl
.req
.day
> dm
)
481 errx(EXIT_FAILURE
, _("illegal day value: use 1-%d"), dm
);
482 ctl
.req
.day
= day_in_year(&ctl
, ctl
.req
.day
,
483 ctl
.req
.month
, ctl
.req
.year
);
484 } else if ((int32_t) (local_time
->tm_year
+ 1900) == ctl
.req
.year
) {
485 ctl
.req
.day
= local_time
->tm_yday
+ 1;
487 if (!ctl
.req
.month
&& !ctl
.req
.week
) {
488 ctl
.req
.month
= local_time
->tm_mon
+ 1;
493 ctl
.req
.day
= local_time
->tm_yday
+ 1;
494 ctl
.req
.year
= local_time
->tm_year
+ 1900;
496 ctl
.req
.month
= local_time
->tm_mon
+ 1;
499 warnx(_("bad usage"));
500 errtryhelp(EXIT_FAILURE
);
503 if (0 < ctl
.req
.week
) {
504 int yday
= week_to_day(&ctl
);
505 int leap
= leap_year(&ctl
, ctl
.req
.year
);
509 errx(EXIT_FAILURE
, _("illegal week value: year %d "
510 "doesn't have week %d"),
511 ctl
.req
.year
, ctl
.req
.week
);
512 while (m
<= DECEMBER
&& yday
> days_in_month
[leap
][m
])
513 yday
-= days_in_month
[leap
][m
++];
514 if (DECEMBER
< m
&& ctl
.weektype
& WEEK_NUM_ISO
) {
515 /* In some years (e.g. 2010 in ISO mode) it's possible
516 * to have a remnant of week 53 starting the year yet
517 * the year in question ends during 52, in this case
518 * we're assuming that early remnant is being referred
519 * to if 53 is given as argument. */
520 if (ctl
.req
.week
!= week_number(31, DECEMBER
, ctl
.req
.year
- 1, &ctl
))
522 _("illegal week value: year %d "
523 "doesn't have week %d"),
524 ctl
.req
.year
, ctl
.req
.week
);
527 ctl
.req
.month
= MONTHS_IN_YEAR
< m
? 1 : m
;
532 if (!colors_init(ctl
.colormode
, "cal")) {
534 ctl
.weektype
&= ~WEEK_NUM_MASK
;
537 if (yflag
|| Yflag
) {
538 ctl
.gutter_width
= 3;
539 ctl
.num_months
= MONTHS_IN_YEAR
;
541 ctl
.req
.start_month
= 1; /* start from Jan */
542 ctl
.header_year
= 1; /* print year number */
546 if (ctl
.num_months
> 1 && ctl
.months_in_row
== 0)
547 ctl
.months_in_row
= ctl
.julian
? MONTHS_IN_YEAR_ROW
- 1 :
549 else if (!ctl
.months_in_row
)
550 ctl
.months_in_row
= 1;
560 /* leap year -- account for gregorian reformation in 1752 */
561 static int leap_year(const struct cal_control
*ctl
, int32_t year
)
563 if (year
<= ctl
->reform_year
)
566 return ( !(year
% 4) && (year
% 100) ) || !(year
% 400);
569 static void init_monthnames(struct cal_control
*ctl
)
573 if (ctl
->full_month
[0] != NULL
)
574 return; /* already initialized */
576 for (i
= 0; i
< MONTHS_IN_YEAR
; i
++)
577 ctl
->full_month
[i
] = nl_langinfo(ALTMON_1
+ i
);
580 static void init_abbr_monthnames(struct cal_control
*ctl
)
584 if (ctl
->abbr_month
[0] != NULL
)
585 return; /* already initialized */
587 for (i
= 0; i
< MONTHS_IN_YEAR
; i
++)
588 ctl
->abbr_month
[i
] = nl_langinfo(_NL_ABALTMON_1
+ i
);
591 static int monthname_to_number(struct cal_control
*ctl
, const char *name
)
595 init_monthnames(ctl
);
596 for (i
= 0; i
< MONTHS_IN_YEAR
; i
++)
597 if (strcasecmp(ctl
->full_month
[i
], name
) == 0)
600 init_abbr_monthnames(ctl
);
601 for (i
= 0; i
< MONTHS_IN_YEAR
; i
++)
602 if (strcasecmp(ctl
->abbr_month
[i
], name
) == 0)
608 static void headers_init(struct cal_control
*ctl
)
611 char *cur_dh
= day_headings
;
612 char tmp
[FMT_ST_CHARS
];
615 year_len
= snprintf(tmp
, sizeof(tmp
), "%04d", ctl
->req
.year
);
617 if (year_len
< 0 || (size_t)year_len
>= sizeof(tmp
)) {
618 /* XXX impossible error */
622 for (i
= 0; i
< DAYS_IN_WEEK
; i
++) {
624 wd
= (i
+ ctl
->weekstart
) % DAYS_IN_WEEK
;
627 strcat(cur_dh
++, " ");
628 space_left
= sizeof(day_headings
) - (cur_dh
- day_headings
);
630 if (space_left
<= (ctl
->day_width
- 1))
632 cur_dh
+= center_str(nl_langinfo(ABDAY_1
+ wd
), cur_dh
,
633 space_left
, ctl
->day_width
- 1);
636 init_monthnames(ctl
);
638 for (i
= 0; i
< MONTHS_IN_YEAR
; i
++) {
639 /* The +1 after year_len is space in between month and year. */
640 if (ctl
->week_width
< strlen(ctl
->full_month
[i
]) + year_len
+ 1)
641 ctl
->header_hint
= 1;
645 static void cal_fill_month(struct cal_month
*month
, const struct cal_control
*ctl
)
647 int first_week_day
= day_in_week(ctl
, 1, month
->month
, month
->year
);
649 int i
, j
, weeklines
= 0;
652 j
= day_in_year(ctl
, 1, month
->month
, month
->year
);
655 month_days
= j
+ days_in_month
[leap_year(ctl
, month
->year
)][month
->month
];
657 /* True when Sunday is not first day in the output week. */
658 if (ctl
->weekstart
) {
659 first_week_day
-= ctl
->weekstart
;
660 if (first_week_day
< 0)
661 first_week_day
= DAYS_IN_WEEK
- ctl
->weekstart
;
662 month_days
+= ctl
->weekstart
- 1;
665 /* Fill day array. */
666 for (i
= 0; i
< MAXDAYS
; i
++) {
667 if (0 < first_week_day
) {
668 month
->days
[i
] = SPACE
;
672 if (j
< month_days
) {
673 if (month
->year
== ctl
->reform_year
&&
674 month
->month
== REFORMATION_MONTH
&&
675 (j
== 3 || j
== 247))
676 j
+= NUMBER_MISSING_DAYS
;
681 month
->days
[i
] = SPACE
;
685 /* Add week numbers */
687 int weeknum
= week_number(1, month
->month
, month
->year
, ctl
);
688 weeklines
= MAXDAYS
/ DAYS_IN_WEEK
- weeklines
/ DAYS_IN_WEEK
;
689 for (i
= 0; i
< MAXDAYS
/ DAYS_IN_WEEK
; i
++) {
692 weeknum
= week_number(month
->days
[i
* DAYS_IN_WEEK
], month
->month
, month
->year
, ctl
);
693 month
->weeks
[i
] = weeknum
++;
695 month
->weeks
[i
] = SPACE
;
701 static void cal_output_header(struct cal_month
*month
, const struct cal_control
*ctl
)
703 char out
[FMT_ST_CHARS
];
706 if (ctl
->header_hint
|| ctl
->header_year
) {
707 for (i
= month
; i
; i
= i
->next
) {
708 sprintf(out
, _("%s"), ctl
->full_month
[i
->month
- 1]);
709 center(out
, ctl
->week_width
- 1, i
->next
== NULL
? 0 : ctl
->gutter_width
);
711 if (!ctl
->header_year
) {
713 for (i
= month
; i
; i
= i
->next
) {
714 sprintf(out
, _("%04d"), i
->year
);
715 center(out
, ctl
->week_width
- 1, i
->next
== NULL
? 0 : ctl
->gutter_width
);
719 for (i
= month
; i
; i
= i
->next
) {
720 sprintf(out
, _("%s %04d"), ctl
->full_month
[i
->month
- 1], i
->year
);
721 center(out
, ctl
->week_width
- 1, i
->next
== NULL
? 0 : ctl
->gutter_width
);
725 for (i
= month
; i
; i
= i
->next
) {
728 sprintf(out
, "%*s%s", (int)ctl
->day_width
- 1, "", day_headings
);
730 sprintf(out
, "%*s%s", (int)ctl
->day_width
, "", day_headings
);
733 my_putstring(day_headings
);
734 if (i
->next
!= NULL
) {
735 sprintf(out
, "%*s", ctl
->gutter_width
, "");
742 static void cal_output_months(struct cal_month
*month
, const struct cal_control
*ctl
)
744 char out
[FMT_ST_CHARS
];
745 int reqday
, week_line
, d
;
749 for (week_line
= 0; week_line
< MAXDAYS
/ DAYS_IN_WEEK
; week_line
++) {
750 for (i
= month
; i
; i
= i
->next
) {
751 /* Determine the day that should be highlighted. */
753 if (i
->month
== ctl
->req
.month
&& i
->year
== ctl
->req
.year
) {
755 reqday
= ctl
->req
.day
;
757 reqday
= ctl
->req
.day
+ 1 -
758 day_in_year(ctl
, 1, i
->month
,
763 if (0 < i
->weeks
[week_line
]) {
764 if ((ctl
->weektype
& WEEK_NUM_MASK
) ==
766 sprintf(out
, "%s%2d%s", Senter
, i
->weeks
[week_line
],
769 sprintf(out
, "%2d", i
->weeks
[week_line
]);
771 sprintf(out
, "%2s", "");
773 skip
= ctl
->day_width
;
775 /* First day of the week is one char narrower than the other days,
776 * unless week number is printed. */
777 skip
= ctl
->day_width
- 1;
779 for (d
= DAYS_IN_WEEK
* week_line
;
780 d
< DAYS_IN_WEEK
* week_line
+ DAYS_IN_WEEK
; d
++) {
781 if (0 < i
->days
[d
]) {
782 if (reqday
== i
->days
[d
])
783 sprintf(out
, "%*s%s%*d%s", skip
- (ctl
->julian
? 3 : 2),
784 "", Senter
, (ctl
->julian
? 3 : 2),
787 sprintf(out
, "%*d", skip
, i
->days
[d
]);
789 sprintf(out
, "%*s", skip
, "");
791 if (skip
< (int)ctl
->day_width
)
794 if (i
->next
!= NULL
) {
795 sprintf(out
, "%*s", ctl
->gutter_width
, "");
800 int extra
= ctl
->num_months
> 3 ? 0 : 1;
801 sprintf(out
, "%*s\n", ctl
->gutter_width
- extra
, "");
807 static void monthly(const struct cal_control
*ctl
)
809 struct cal_month m1
,m2
,m3
, *m
;
810 int i
, rows
, new_month
, month
= ctl
->req
.start_month
? ctl
->req
.start_month
: ctl
->req
.month
;
811 int32_t year
= ctl
->req
.year
;
813 /* cal -3, cal -Y --span, etc. */
814 if (ctl
->span_months
) {
815 new_month
= month
- ctl
->num_months
/ 2;
817 month
= new_month
+ MONTHS_IN_YEAR
;
824 m1
.next
= (ctl
->months_in_row
> 1) ? &m2
: NULL
;
825 m2
.next
= (ctl
->months_in_row
> 2) ? &m3
: NULL
;
828 rows
= (ctl
->num_months
- 1) / ctl
->months_in_row
;
829 for (i
= 0; i
< rows
+ 1 ; i
++){
831 switch (ctl
->num_months
% ctl
->months_in_row
){
840 for (m
= &m1
; m
; m
= m
->next
){
843 if (MONTHS_IN_YEAR
< month
) {
847 cal_fill_month(m
, ctl
);
849 cal_output_header(&m1
, ctl
);
850 cal_output_months(&m1
, ctl
);
854 static void yearly(const struct cal_control
*ctl
)
856 char out
[FMT_ST_CHARS
];
859 year_width
+= (ctl
->week_width
+ 1) * (ctl
->julian
? 2 : 3);
863 if (ctl
->header_year
) {
864 sprintf(out
, "%04d", ctl
->req
.year
);
865 center(out
, year_width
, 0);
866 my_putstring("\n\n");
870 /* Is empty line at the end year output really needed? */
876 * return the 1 based day number within the year
878 static int day_in_year(const struct cal_control
*ctl
,
879 int day
, int month
, int32_t year
)
883 leap
= leap_year(ctl
, year
);
884 for (i
= 1; i
< month
; i
++)
885 day
+= days_in_month
[leap
][i
];
891 * return the 0 based day number for any date from 1 Jan. 1 to
892 * 31 Dec. 9999. Assumes the Gregorian reformation eliminates
893 * 3 Sep. 1752 through 13 Sep. 1752, and returns invalid weekday
894 * during the period of 11 days.
896 static int day_in_week(const struct cal_control
*ctl
, int day
,
897 int month
, int32_t year
)
900 * The magic constants in the reform[] array are, in a simplified
901 * sense, the remaining days after slicing into one week periods the total
902 * days from the beginning of the year to the target month. That is,
903 * weeks + reform[] days gets us to the target month. The exception is,
904 * that for the months past February 'DOY - 1' must be used.
906 * DoY (Day of Year): total days to the target month
908 * Month 1 2 3 4 5 6 7 8 9 10 11 12
909 * DoY 0 31 59 90 120 151 181 212 243 273 304 334
911 * DoY - 1 % 7 - -- 2 5 0 3 5 1 4 6 2 4
912 * reform[] = { 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 };
914 * Note: these calculations are for non leap years.
916 static const int reform
[] = { 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 };
917 static const int old
[] = { 5, 1, 0, 3, 5, 1, 3, 6, 2, 4, 0, 2 };
919 if (year
!= ctl
->reform_year
+ 1)
920 year
-= month
< MARCH
;
922 year
-= (month
< MARCH
) + 14;
923 if (ctl
->reform_year
< year
924 || (year
== ctl
->reform_year
&& REFORMATION_MONTH
< month
)
925 || (year
== ctl
->reform_year
926 && month
== REFORMATION_MONTH
&& 13 < day
)) {
927 return ((int64_t) year
+ (year
/ 4)
928 - (year
/ 100) + (year
/ 400)
929 + reform
[month
- 1] + day
) % DAYS_IN_WEEK
;
931 if (year
< ctl
->reform_year
932 || (year
== ctl
->reform_year
&& month
< REFORMATION_MONTH
)
933 || (year
== ctl
->reform_year
&& month
== REFORMATION_MONTH
&& day
< 3))
934 return ((int64_t) year
+ year
/ 4 + old
[month
- 1] + day
)
941 * return the week number of a given date, 1..54.
942 * Supports ISO-8601 and North American modes.
943 * Day may be given as Julian day of the year mode, in which
944 * case the month is disregarded entirely.
946 static int week_number(int day
, int month
, int32_t year
, const struct cal_control
*ctl
)
949 const int wday
= day_in_week(ctl
, 1, JANUARY
, year
);
951 if (ctl
->weektype
& WEEK_NUM_ISO
)
952 fday
= wday
+ (wday
>= FRIDAY
? -2 : 5);
954 /* WEEK_NUM_US: Jan 1 is always First week, that may
955 * begin previous year. That means there is very seldom
956 * more than 52 weeks, */
959 /* For julian dates the month can be set to 1, the global julian
960 * variable cannot be relied upon here, because we may recurse
961 * internally for 31.12. which would not work. */
962 if (day
> DAYS_IN_MONTH
)
965 yday
= day_in_year(ctl
, day
, month
, year
);
966 if (year
== ctl
->reform_year
&& yday
>= YDAY_AFTER_MISSING
)
967 fday
-= NUMBER_MISSING_DAYS
;
969 /* Last year is last year */
970 if (yday
+ fday
< DAYS_IN_WEEK
)
971 return week_number(31, DECEMBER
, year
- 1, ctl
);
973 /* Or it could be part of the next year. The reformation year had less
974 * days than 365 making this check invalid, but reformation year ended
975 * on Sunday and in week 51, so it's ok here. */
976 if (ctl
->weektype
== WEEK_NUM_ISO
&& yday
>= 363
977 && day_in_week(ctl
, day
, month
, year
) >= MONDAY
978 && day_in_week(ctl
, day
, month
, year
) <= WEDNESDAY
979 && day_in_week(ctl
, 31, DECEMBER
, year
) >= MONDAY
980 && day_in_week(ctl
, 31, DECEMBER
, year
) <= WEDNESDAY
)
981 return week_number(1, JANUARY
, year
+ 1, ctl
);
983 return (yday
+ fday
) / DAYS_IN_WEEK
;
988 * return the yday of the first day in a given week inside
989 * the given year. This may be something other than Monday
990 * for ISO-8601 modes. For North American numbering this
991 * always returns a Sunday.
993 static int week_to_day(const struct cal_control
*ctl
)
997 wday
= day_in_week(ctl
, 1, JANUARY
, ctl
->req
.year
);
998 yday
= ctl
->req
.week
* DAYS_IN_WEEK
- wday
;
1000 if (ctl
->req
.year
== ctl
->reform_year
&& yday
>= YDAY_AFTER_MISSING
)
1001 yday
+= NUMBER_MISSING_DAYS
;
1003 if (ctl
->weektype
& WEEK_NUM_ISO
)
1004 yday
-= (wday
>= FRIDAY
? -2 : 5);
1006 yday
-= 6; /* WEEK_NUM_US */
1014 * Center string, handling multibyte characters appropriately.
1015 * In addition if the string is too large for the width it's truncated.
1016 * The number of trailing spaces may be 1 less than the number of leading spaces.
1018 static int center_str(const char* src
, char* dest
,
1019 size_t dest_size
, size_t width
)
1021 return mbsalign(src
, dest
, dest_size
, &width
,
1022 MBS_ALIGN_CENTER
, MBA_UNIBYTE_FALLBACK
);
1025 static void center(const char *str
, size_t len
, int separate
)
1027 char lineout
[FMT_ST_CHARS
];
1029 center_str(str
, lineout
, ARRAY_SIZE(lineout
), len
);
1030 my_putstring(lineout
);
1033 snprintf(lineout
, sizeof(lineout
), "%*s", separate
, "");
1034 my_putstring(lineout
);
1038 static int parse_reform_year(const char *reform_year
)
1047 struct reform years
[] = {
1048 {"gregorian", GREGORIAN
},
1054 for (i
= 0; i
< ARRAY_SIZE(years
); i
++) {
1055 if (strcasecmp(reform_year
, years
[i
].name
) == 0) {
1056 return years
[i
].val
;
1059 errx(EXIT_FAILURE
, "invalid --reform value: '%s'", reform_year
);
1062 static void __attribute__((__noreturn__
)) usage(void)
1065 fputs(USAGE_HEADER
, out
);
1066 fprintf(out
, _(" %s [options] [[[day] month] year]\n"), program_invocation_short_name
);
1067 fprintf(out
, _(" %s [options] <timestamp|monthname>\n"), program_invocation_short_name
);
1069 fputs(USAGE_SEPARATOR
, out
);
1070 fputs(_("Display a calendar, or some part of it.\n"), out
);
1071 fputs(_("Without any arguments, display the current month.\n"), out
);
1073 fputs(USAGE_OPTIONS
, out
);
1074 fputs(_(" -1, --one show only a single month (default)\n"), out
);
1075 fputs(_(" -3, --three show three months spanning the date\n"), out
);
1076 fputs(_(" -n, --months <num> show num months starting with date's month\n"), out
);
1077 fputs(_(" -S, --span span the date when displaying multiple months\n"), out
);
1078 fputs(_(" -s, --sunday Sunday as first day of week\n"), out
);
1079 fputs(_(" -m, --monday Monday as first day of week\n"), out
);
1080 fputs(_(" -j, --julian use day-of-year for all calendars\n"), out
);
1081 fputs(_(" --reform <val> Gregorian reform date (1752|gregorian|iso|julian)\n"), out
);
1082 fputs(_(" --iso alias for --reform=iso\n"), out
);
1083 fputs(_(" -y, --year show the whole year\n"), out
);
1084 fputs(_(" -Y, --twelve show the next twelve months\n"), out
);
1085 fputs(_(" -w, --week[=<num>] show US or ISO-8601 week numbers\n"), out
);
1086 fputs(_(" --color[=<when>] colorize messages (auto, always or never)\n"), out
);
1088 " %s\n", USAGE_COLORS_DEFAULT
);
1090 fputs(USAGE_SEPARATOR
, out
);
1091 printf(USAGE_HELP_OPTIONS(23));
1092 printf(USAGE_MAN_TAIL("cal(1)"));