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 Miśkiewicz <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 over-ridable default NUM_MONTHS 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>
70 #include "closestream.h"
75 #if defined(HAVE_LIBNCURSES) || defined(HAVE_LIBNCURSESW)
79 #elif defined(HAVE_NCURSES_NCURSES_H)
80 #include <ncurses/ncurses.h>
83 #include <term.h> /* include after <curses.h> */
86 my_setupterm(const char *term
, int fildes
, int *errret
) {
87 setupterm((char*)term
, fildes
, errret
);
91 my_putstring(char *s
) {
96 my_tgetstr(char *s
__attribute__ ((__unused__
)), char *ss
) {
97 const char* ret
= tigetstr(ss
);
98 if (!ret
|| ret
==(char*)-1)
104 #elif defined(HAVE_LIBTERMCAP)
108 char termbuffer
[4096];
110 char *strbuf
= termbuffer
;
113 my_setupterm(const char *term
, int fildes
, int *errret
) {
114 *errret
= tgetent(tcbuffer
, term
);
118 my_putstring(char *s
) {
119 tputs (s
, 1, putchar
);
123 my_tgetstr(char *s
, char *ss
__attribute__ ((__unused__
))) {
124 const char* ret
= tgetstr(s
, &strbuf
);
131 #else /* ! (HAVE_LIBTERMCAP || HAVE_LIBNCURSES || HAVE_LIBNCURSESW) */
134 my_putstring(char *s
) {
142 const char *Senter
="", *Sexit
="";/* enter and exit standout mode */
143 int Slen
; /* strlen of Senter+Sexit */
144 char *Hrow
; /* pointer to highlighted row in month */
146 #include "widechar.h"
148 /* allow compile-time define to over-ride default */
153 #if ( NUM_MONTHS != 1 && NUM_MONTHS !=3 )
154 #error NUM_MONTHS must be 1 or 3
157 #define THURSDAY 4 /* for reformation */
158 #define SATURDAY 6 /* 1 Jan 1 was a Saturday */
160 #define FIRST_MISSING_DAY 639799 /* 3 Sep 1752 */
161 #define NUMBER_MISSING_DAYS 11 /* 11 day correction */
163 #define MAXDAYS 42 /* slots in a month array */
164 #define SPACE -1 /* used in day array */
166 static int days_in_month
[2][13] = {
167 {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
168 {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
171 #define SEP1752_OFS 4 /* sep1752[4] is a Sunday */
173 /* 1 Sep 1752 is represented by sep1752[6] and j_sep1752[6] */
174 int sep1752
[MAXDAYS
+6] = {
175 SPACE
, SPACE
, SPACE
, SPACE
,
176 SPACE
, SPACE
, 1, 2, 14, 15, 16,
177 17, 18, 19, 20, 21, 22, 23,
178 24, 25, 26, 27, 28, 29, 30,
179 SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
,
180 SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
,
181 SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
,
183 }, j_sep1752
[MAXDAYS
+6] = {
184 SPACE
, SPACE
, SPACE
, SPACE
,
185 SPACE
, SPACE
, 245, 246, 258, 259, 260,
186 261, 262, 263, 264, 265, 266, 267,
187 268, 269, 270, 271, 272, 273, 274,
188 SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
,
189 SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
,
190 SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
,
192 }, empty
[MAXDAYS
] = {
193 SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
,
194 SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
,
195 SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
,
196 SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
,
197 SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
,
198 SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
, SPACE
201 #define DAY_LEN 3 /* 3 spaces per day */
202 #define J_DAY_LEN 4 /* 4 spaces per day */
203 #define WEEK_LEN 21 /* 7 days * 3 characters */
204 #define J_WEEK_LEN 28 /* 7 days * 4 characters */
205 #define HEAD_SEP 2 /* spaces between day headings */
208 /* utf-8 can have up to 6 bytes per char; and an extra byte for ending \0 */
209 char day_headings
[WEEK_LEN
*6+1];
210 /* weekstart = 1 => " M Tu W Th F S S " */
211 char j_day_headings
[J_WEEK_LEN
*6+1];
212 /* weekstart = 1 => " M Tu W Th F S S " */
213 const char *full_month
[12];
215 /* leap year -- account for gregorian reformation in 1752 */
216 #define leap_year(yr) \
217 ((yr) <= 1752 ? !((yr) % 4) : \
218 (!((yr) % 4) && ((yr) % 100)) || !((yr) % 400))
220 /* number of centuries since 1700, not inclusive */
221 #define centuries_since_1700(yr) \
222 ((yr) > 1700 ? (yr) / 100 - 17 : 0)
224 /* number of centuries since 1700 whose modulo of 400 is 0 */
225 #define quad_centuries_since_1700(yr) \
226 ((yr) > 1600 ? ((yr) - 1600) / 400 : 0)
228 /* number of leap years between year 1 and this year, not inclusive */
229 #define leap_years_since_year_1(yr) \
230 ((yr) / 4 - centuries_since_1700(yr) + quad_centuries_since_1700(yr))
232 /* 0 => sunday, 1 => monday */
236 #define TODAY_FLAG 0x400 /* flag day for highlighting */
238 #define FMT_ST_LINES 8
239 #define FMT_ST_CHARS 300 /* 90 suffices in most locales */
242 char s
[FMT_ST_LINES
][FMT_ST_CHARS
];
245 char * ascii_day(char *, int);
246 int center_str(const char* src
, char* dest
, size_t dest_size
, size_t width
);
247 void center(const char *, size_t, int);
248 void day_array(int, int, int, int *);
249 int day_in_week(int, int, int);
250 int day_in_year(int, int, int);
251 void yearly(int, int);
252 void j_yearly(int, int);
253 void do_monthly(int, int, int, struct fmt_st
*);
254 void monthly(int, int, int);
255 void monthly3(int, int, int);
256 void trim_trailing_spaces(char *);
257 static void __attribute__ ((__noreturn__
)) usage(FILE * out
);
258 void headers_init(void);
261 main(int argc
, char **argv
) {
262 struct tm
*local_time
;
264 int ch
, day
, month
, year
, yflag
;
265 int num_months
= NUM_MONTHS
;
267 static const struct option longopts
[] = {
268 {"one", no_argument
, NULL
, '1'},
269 {"three", no_argument
, NULL
, '3'},
270 {"sunday", no_argument
, NULL
, 's'},
271 {"monday", no_argument
, NULL
, 'm'},
272 {"julian", no_argument
, NULL
, 'j'},
273 {"year", no_argument
, NULL
, 'y'},
274 {"version", no_argument
, NULL
, 'V'},
275 {"help", no_argument
, NULL
, 'h'},
279 setlocale(LC_ALL
, "");
280 bindtextdomain(PACKAGE
, LOCALEDIR
);
282 atexit(close_stdout
);
284 #if defined(HAVE_LIBNCURSES) || defined(HAVE_LIBNCURSESW) || defined(HAVE_LIBTERMCAP)
285 if ((term
= getenv("TERM"))) {
287 my_setupterm(term
, 1, &ret
);
289 Senter
= my_tgetstr("so","smso");
290 Sexit
= my_tgetstr("se","rmso");
291 Slen
= strlen(Senter
) + strlen(Sexit
);
297 * The traditional Unix cal utility starts the week at Sunday,
298 * while ISO 8601 starts at Monday. We read the start day from
299 * the locale database, which can be overridden with the
300 * -s (Sunday) or -m (Monday) options.
302 #if HAVE_DECL__NL_TIME_WEEK_1STDAY
304 * You need to use 2 locale variables to get the first day of the week.
305 * This is needed to support first_weekday=2 and first_workday=1 for
306 * the rare case where working days span across 2 weeks.
307 * This shell script shows the combinations and calculations involved:
309 * for LANG in en_US ru_RU fr_FR csb_PL POSIX; do
310 * printf "%s:\t%s + %s -1 = " $LANG $(locale week-1stday first_weekday)
311 * date -d"$(locale week-1stday) +$(($(locale first_weekday)-1))day" +%w
314 * en_US: 19971130 + 1 -1 = 0 #0 = sunday
315 * ru_RU: 19971130 + 2 -1 = 1
316 * fr_FR: 19971201 + 1 -1 = 1
317 * csb_PL: 19971201 + 2 -1 = 2
318 * POSIX: 19971201 + 7 -1 = 0
322 union { unsigned int word
; char *string
; } val
;
323 val
.string
= nl_langinfo(_NL_TIME_WEEK_1STDAY
);
326 wfd
= day_in_week(wfd
% 100, (wfd
/ 100) % 100, wfd
/ (100 * 100));
327 weekstart
= (wfd
+ *nl_langinfo(_NL_TIME_FIRST_WEEKDAY
) - 1) % 7;
332 while ((ch
= getopt_long(argc
, argv
, "13mjsyVh", longopts
, NULL
)) != -1)
335 num_months
= 1; /* default */
341 weekstart
= 0; /* default */
353 printf(UTIL_LINUX_VERSION
);
365 local_time
= localtime(&now
);
367 day
= month
= year
= 0;
370 day
= strtos32_or_err(*argv
++, _("illegal day value"));
371 if (day
< 1 || 31 < day
)
372 errx(EXIT_FAILURE
, _("illegal day value: use 1-%d"), 31);
375 month
= strtos32_or_err(*argv
++, _("illegal month value: use 1-12"));
376 if (month
< 1 || 12 < month
)
377 errx(EXIT_FAILURE
, _("illegal month value: use 1-12"));
380 year
= strtos32_or_err(*argv
++, _("illegal year value: use 1-9999"));
381 if (year
< 1 || 9999 < year
)
382 errx(EXIT_FAILURE
, _("illegal year value: use 1-9999"));
384 int dm
= days_in_month
[leap_year(year
)][month
];
386 errx(EXIT_FAILURE
, _("illegal day value: use 1-%d"), dm
);
387 day
= day_in_year(day
, month
, year
);
388 } else if ((local_time
->tm_year
+ 1900) == year
) {
389 day
= local_time
->tm_yday
+ 1;
395 day
= local_time
->tm_yday
+ 1;
396 year
= local_time
->tm_year
+ 1900;
397 month
= local_time
->tm_mon
+ 1;
405 day
= 0; /* don't highlight */
411 else if (num_months
== 1)
412 monthly(day
, month
, year
);
413 else if (num_months
== 3)
414 monthly3(day
, month
, year
);
419 void headers_init(void)
422 char *cur_dh
= day_headings
, *cur_j_dh
= j_day_headings
;
424 strcpy(day_headings
, "");
425 strcpy(j_day_headings
, "");
427 for (i
= 0; i
< 7; i
++) {
429 wd
= (i
+ weekstart
) % 7;
432 strcat(cur_dh
++, " ");
434 sizeof(day_headings
) - (cur_dh
- day_headings
);
438 center_str(nl_langinfo(ABDAY_1
+ wd
), cur_dh
,
442 strcat(cur_j_dh
++, " ");
444 sizeof(j_day_headings
) - (cur_j_dh
- j_day_headings
);
448 center_str(nl_langinfo(ABDAY_1
+ wd
), cur_j_dh
,
452 for (i
= 0; i
< 12; i
++)
453 full_month
[i
] = nl_langinfo(MON_1
+ i
);
457 do_monthly(int day
, int month
, int year
, struct fmt_st
*out
) {
458 int col
, row
, days
[MAXDAYS
];
459 char *p
, lineout
[FMT_ST_CHARS
];
460 int width
= (julian
? J_WEEK_LEN
: WEEK_LEN
) - 1;
462 day_array(day
, month
, year
, days
);
465 * %s is the month name, %d the year number.
466 * you can change the order and/or add something here; eg for
467 * Basque the translation should be: "%2$dko %1$s", and
468 * the Vietnamese should be "%s na(m %d", etc.
470 snprintf(lineout
, sizeof(lineout
), _("%s %d"),
471 full_month
[month
- 1], year
);
472 center_str(lineout
, out
->s
[0], ARRAY_SIZE(out
->s
[0]), width
);
474 snprintf(out
->s
[1], FMT_ST_CHARS
, "%s",
475 julian
? j_day_headings
: day_headings
);
476 for (row
= 0; row
< 6; row
++) {
478 for (col
= 0, p
= lineout
; col
< 7; col
++) {
479 int xd
= days
[row
* 7 + col
];
480 if (xd
!= SPACE
&& (xd
& TODAY_FLAG
))
482 p
= ascii_day(p
, xd
);
485 trim_trailing_spaces(lineout
);
486 snprintf(out
->s
[row
+2], FMT_ST_CHARS
, "%s", lineout
);
488 Hrow
= out
->s
[row
+2];
493 monthly(int day
, int month
, int year
) {
497 do_monthly(day
, month
, year
, &out
);
498 for (i
= 0; i
< FMT_ST_LINES
; i
++) {
499 my_putstring(out
.s
[i
]);
505 monthly3(int day
, int month
, int year
) {
506 char lineout
[FMT_ST_CHARS
];
509 struct fmt_st out_prev
;
510 struct fmt_st out_curm
;
511 struct fmt_st out_next
;
512 int prev_month
, prev_year
;
513 int next_month
, next_year
;
517 prev_year
= year
- 1;
519 prev_month
= month
- 1;
524 next_year
= year
+ 1;
526 next_month
= month
+ 1;
530 do_monthly(day
, prev_month
, prev_year
, &out_prev
);
531 do_monthly(day
, month
, year
, &out_curm
);
532 do_monthly(day
, next_month
, next_year
, &out_next
);
534 width
= (julian
? J_WEEK_LEN
: WEEK_LEN
) -1;
535 for (i
= 0; i
< 2; i
++) {
536 snprintf(lineout
, sizeof(lineout
),
537 "%s %s %s\n", out_prev
.s
[i
], out_curm
.s
[i
], out_next
.s
[i
]);
538 my_putstring(lineout
);
540 for (i
= 2; i
< FMT_ST_LINES
; i
++) {
542 w1
= w2
= w3
= width
;
544 #if defined(HAVE_LIBNCURSES) || defined(HAVE_LIBNCURSESW) || defined(HAVE_LIBTERMCAP)
545 /* adjust width to allow for non printable characters */
546 w1
+= (out_prev
.s
[i
] == Hrow
? Slen
: 0);
547 w2
+= (out_curm
.s
[i
] == Hrow
? Slen
: 0);
548 w3
+= (out_next
.s
[i
] == Hrow
? Slen
: 0);
550 snprintf(lineout
, sizeof(lineout
), "%-*s %-*s %-*s\n",
555 my_putstring(lineout
);
560 j_yearly(int day
, int year
) {
561 int col
, *dp
, i
, month
, row
, which_cal
;
562 int days
[12][MAXDAYS
];
563 char *p
, lineout
[80];
565 snprintf(lineout
, sizeof(lineout
), "%d", year
);
566 center(lineout
, J_WEEK_LEN
*2 + J_HEAD_SEP
- 1, 0);
567 my_putstring("\n\n");
569 for (i
= 0; i
< 12; i
++)
570 day_array(day
, i
+ 1, year
, days
[i
]);
571 memset(lineout
, ' ', sizeof(lineout
) - 1);
572 lineout
[sizeof(lineout
) - 1] = '\0';
573 for (month
= 0; month
< 12; month
+= 2) {
574 center(full_month
[month
], J_WEEK_LEN
-1, J_HEAD_SEP
+1);
575 center(full_month
[month
+ 1], J_WEEK_LEN
-1, 0);
576 snprintf(lineout
, sizeof(lineout
),
577 "\n%s%*s %s\n", j_day_headings
, J_HEAD_SEP
, "",
579 my_putstring(lineout
);
580 for (row
= 0; row
< 6; row
++) {
582 for (which_cal
= 0; which_cal
< 2; which_cal
++) {
583 dp
= &days
[month
+ which_cal
][row
* 7];
584 for (col
= 0; col
< 7; col
++)
585 p
= ascii_day(p
, *dp
++);
586 p
+= sprintf(p
, " ");
589 trim_trailing_spaces(lineout
);
590 my_putstring(lineout
);
598 yearly(int day
, int year
) {
599 int col
, *dp
, i
, month
, row
, which_cal
;
600 int days
[12][MAXDAYS
];
601 char *p
, lineout
[100];
603 snprintf(lineout
, sizeof(lineout
), "%d", year
);
604 center(lineout
, WEEK_LEN
*3 + HEAD_SEP
*2 - 1, 0);
605 my_putstring("\n\n");
607 for (i
= 0; i
< 12; i
++)
608 day_array(day
, i
+ 1, year
, days
[i
]);
609 memset(lineout
, ' ', sizeof(lineout
) - 1);
610 lineout
[sizeof(lineout
) - 1] = '\0';
611 for (month
= 0; month
< 12; month
+= 3) {
612 center(full_month
[month
], WEEK_LEN
-1, HEAD_SEP
+1);
613 center(full_month
[month
+ 1], WEEK_LEN
-1, HEAD_SEP
+1);
614 center(full_month
[month
+ 2], WEEK_LEN
-1, 0);
615 snprintf(lineout
, sizeof(lineout
),
616 "\n%s%*s %s%*s %s\n", day_headings
, HEAD_SEP
,
617 "", day_headings
, HEAD_SEP
, "", day_headings
);
618 my_putstring(lineout
);
619 for (row
= 0; row
< 6; row
++) {
621 for (which_cal
= 0; which_cal
< 3; which_cal
++) {
622 dp
= &days
[month
+ which_cal
][row
* 7];
623 for (col
= 0; col
< 7; col
++)
624 p
= ascii_day(p
, *dp
++);
625 p
+= sprintf(p
, " ");
628 trim_trailing_spaces(lineout
);
629 my_putstring(lineout
);
638 * Fill in an array of 42 integers with a calendar. Assume for a moment
639 * that you took the (maximum) 6 rows in a calendar and stretched them
640 * out end to end. You would have 42 numbers or spaces. This routine
641 * builds that array for any month from Jan. 1 through Dec. 9999.
644 day_array(int day
, int month
, int year
, int *days
) {
645 int julday
, daynum
, dw
, dm
;
648 if (month
== 9 && year
== 1752) {
649 int sep1752_ofs
= (weekstart
+ SEP1752_OFS
) % 7;
650 d_sep1752
= julian
? j_sep1752
: sep1752
;
651 memcpy(days
, d_sep1752
+ sep1752_ofs
, MAXDAYS
* sizeof(int));
652 for (dm
=0; dm
<MAXDAYS
; dm
++)
653 if (j_sep1752
[dm
+ sep1752_ofs
] == day
)
654 days
[dm
] |= TODAY_FLAG
;
657 memcpy(days
, empty
, MAXDAYS
* sizeof(int));
658 dm
= days_in_month
[leap_year(year
)][month
];
659 dw
= (day_in_week(1, month
, year
) - weekstart
+ 7) % 7;
660 julday
= day_in_year(1, month
, year
);
661 daynum
= julian
? julday
: 1;
665 days
[dw
] |= TODAY_FLAG
;
672 * return the 1 based day number within the year
675 day_in_year(int day
, int month
, int year
) {
678 leap
= leap_year(year
);
679 for (i
= 1; i
< month
; i
++)
680 day
+= days_in_month
[leap
][i
];
686 * return the 0 based day number for any date from 1 Jan. 1 to
687 * 31 Dec. 9999. Assumes the Gregorian reformation eliminates
688 * 3 Sep. 1752 through 13 Sep. 1752. Returns Thursday for all
692 day_in_week(int day
, int month
, int year
) {
695 temp
= (long)(year
- 1) * 365 + leap_years_since_year_1(year
- 1)
696 + day_in_year(day
, month
, year
);
697 if (temp
< FIRST_MISSING_DAY
)
698 return ((temp
- 1 + SATURDAY
) % 7);
699 if (temp
>= (FIRST_MISSING_DAY
+ NUMBER_MISSING_DAYS
))
700 return (((temp
- 1 + SATURDAY
) - NUMBER_MISSING_DAYS
) % 7);
705 ascii_day(char *p
, int day
) {
708 static char *aday
[] = {
710 " 1", " 2", " 3", " 4", " 5", " 6", " 7",
711 " 8", " 9", "10", "11", "12", "13", "14",
712 "15", "16", "17", "18", "19", "20", "21",
713 "22", "23", "24", "25", "26", "27", "28",
718 int len
= julian
? J_DAY_LEN
: DAY_LEN
;
722 if (day
& TODAY_FLAG
) {
724 p
+= sprintf(p
, "%s", Senter
);
728 if ((val
= day
/ 100)) {
741 *p
++ = day
% 10 + '0';
747 p
+= sprintf(p
, "%s", Sexit
);
753 trim_trailing_spaces(char *s
)
759 while (p
> s
&& isspace(*--p
))
767 * Center string, handling multibyte characters appropriately.
768 * In addition if the string is too large for the width it's truncated.
769 * The number of trailing spaces may be 1 less than the number of leading spaces.
772 center_str(const char* src
, char* dest
, size_t dest_size
, size_t width
)
774 return mbsalign(src
, dest
, dest_size
, &width
,
775 MBS_ALIGN_CENTER
, MBA_UNIBYTE_FALLBACK
);
779 center(const char *str
, size_t len
, int separate
)
781 char lineout
[FMT_ST_CHARS
];
783 center_str(str
, lineout
, ARRAY_SIZE(lineout
), len
);
784 my_putstring(lineout
);
787 snprintf(lineout
, sizeof(lineout
), "%*s", separate
, "");
788 my_putstring(lineout
);
792 static void __attribute__ ((__noreturn__
)) usage(FILE * out
)
794 fputs(_("\nUsage:\n"), out
);
796 _(" %s [options] [[[day] month] year]\n"),
797 program_invocation_short_name
);
799 fputs(_("\nOptions:\n"), out
);
800 fputs(_(" -1, --one show only current month (default)\n"
801 " -3, --three show previous, current and next month\n"
802 " -s, --sunday Sunday as first day of week\n"
803 " -m, --monday Monday as first day of week\n"
804 " -j, --julian output Julian dates\n"
805 " -y, --year show whole current year\n"
806 " -V, --version display version information and exit\n"
807 " -h, --help display this help text and exit\n\n"), out
);
809 exit(out
== stderr
? EXIT_FAILURE
: EXIT_SUCCESS
);