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util-linux/misc-utils/cal.c

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/*
* Copyright (c) 1989, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Kim Letkeman.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/* 1999-02-01 Jean-Francois Bignolles: added option '-m' to display
* monday as the first day of the week.
* 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
* - added Native Language Support
*
* 2000-09-01 Michael Charles Pruznick <dummy@netwiz.net>
* Added "-3" option to print prev/next month with current.
* Added overridable default MONTHS_IN_ROW and "-1" option to
* get traditional output when -3 is the default. I hope that
* enough people will like -3 as the default that one day the
* product can be shipped that way.
*
* 2001-05-07 Pablo Saratxaga <pablo@mandrakesoft.com>
* Fixed the bugs with multi-byte charset (zg: cjk, utf-8)
* displaying. made the 'month year' ("%s %d") header translatable
* so it can be adapted to conventions used by different languages
* added support to read "first_weekday" locale information
* still to do: support for 'cal_direction' (will require a major
* rewrite of the displaying) and proper handling of RTL scripts
*/
#include <sys/types.h>
#include <ctype.h>
#include <getopt.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <errno.h>
#include "c.h"
#include "closestream.h"
#include "colors.h"
#include "nls.h"
#include "mbsalign.h"
#include "strutils.h"
#include "optutils.h"
#include "timeutils.h"
#include "ttyutils.h"
#define DOY_MONTH_WIDTH 27 /* -j month width */
#define DOM_MONTH_WIDTH 20 /* month width */
static int has_term = 0;
static const char *Senter = "", *Sexit = ""; /* enter and exit standout mode */
#if defined(HAVE_LIBNCURSES) || defined(HAVE_LIBNCURSESW)
# if defined(HAVE_NCURSESW_TERM_H)
# include <ncursesw/term.h>
# elif defined(HAVE_NCURSES_TERM_H)
# include <ncurses/term.h>
# elif defined(HAVE_TERM_H)
# include <term.h>
# endif
#endif
static int setup_terminal(char *term
#if !defined(HAVE_LIBNCURSES) && !defined(HAVE_LIBNCURSESW)
__attribute__((__unused__))
#endif
)
{
#if defined(HAVE_LIBNCURSES) || defined(HAVE_LIBNCURSESW)
int ret;
if (setupterm(term, STDOUT_FILENO, &ret) != 0 || ret != 1)
return -1;
#endif
return 0;
}
static const char *my_tgetstr(char *ss
#if !defined(HAVE_LIBNCURSES) && !defined(HAVE_LIBNCURSESW)
__attribute__((__unused__))
#endif
)
{
const char *ret = NULL;
#if defined(HAVE_LIBNCURSES) || defined(HAVE_LIBNCURSESW)
if (has_term)
ret = tigetstr(ss);
#endif
if (!ret || ret == (char *)-1)
return "";
return ret;
}
#include "widechar.h"
enum {
GREGORIAN = INT32_MIN,
ISO = INT32_MIN,
GB1752 = 1752,
DEFAULT_REFORM_YEAR = 1752,
JULIAN = INT32_MAX
};
enum {
SUNDAY = 0,
MONDAY,
TUESDAY,
WEDNESDAY,
THURSDAY,
FRIDAY,
SATURDAY,
DAYS_IN_WEEK,
NONEDAY
};
enum {
JANUARY = 1,
FEBRUARY,
MARCH,
APRIL,
MAY,
JUNE,
JULY,
AUGUST,
SEPTEMBER,
OCTOBER,
NOVEMBER,
DECEMBER
};
#define REFORMATION_MONTH SEPTEMBER
#define NUMBER_MISSING_DAYS 11 /* 11 day correction */
#define YDAY_AFTER_MISSING 258 /* 14th in Sep 1752 */
#define MONTHS_IN_YEAR DECEMBER
#define DAYS_IN_MONTH 31
#define MAXDAYS 42 /* slots in a month array */
#define SPACE -1 /* used in day array */
#define SMALLEST_YEAR 1
#define DAY_LEN 3 /* 3 spaces per day */
#define WEEK_LEN (DAYS_IN_WEEK * DAY_LEN)
#define MONTHS_IN_YEAR_ROW 3 /* month columns in year view */
#define WNUM_LEN 3
#define FMT_ST_CHARS 300 /* 90 suffices in most locales */
static const int days_in_month[2][13] = {
{0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
{0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
};
enum {
WEEK_NUM_DISABLED = 0,
WEEK_NUM_MASK=0xff,
WEEK_NUM_ISO=0x100,
WEEK_NUM_US=0x200,
};
/* utf-8 can have up to 6 bytes per char; and an extra byte for ending \0 */
static char day_headings[(WEEK_LEN + 1) * 6 + 1];
struct cal_request {
int day;
int month;
int32_t year;
int week;
int start_month;
};
struct cal_control {
const char *full_month[MONTHS_IN_YEAR]; /* month names */
const char *abbr_month[MONTHS_IN_YEAR]; /* abbreviated month names */
const char *weekdays[DAYS_IN_WEEK]; /* day names */
int reform_year; /* Gregorian reform year */
int colormode; /* day and week number highlight */
int num_months; /* number of requested months */
int span_months; /* span the date */
int months_in_row; /* number of months horizontally in print out */
int weekstart; /* day the week starts, often Sun or Mon */
int weektype; /* WEEK_TYPE_{NONE,ISO,US} */
size_t day_width; /* day width in characters in printout */
size_t week_width; /* 7 * day_width + possible week num */
size_t month_width; /* width of a month (vertical mode) */
int gutter_width; /* spaces in between horizontal month outputs */
struct cal_request req; /* the times user is interested */
unsigned int julian:1, /* julian output */
header_year:1, /* print year number */
header_hint:1, /* does month name + year need two lines to fit */
vertical:1; /* display the output in vertical */
};
struct cal_month {
int days[MAXDAYS]; /* the day numbers, or SPACE */
int weeks[MAXDAYS / DAYS_IN_WEEK];
int month;
int32_t year;
struct cal_month *next;
};
/* function prototypes */
static int leap_year(const struct cal_control *ctl, int32_t year);
static int monthname_to_number(struct cal_control *ctl, const char *name);
static void weekdays_init(struct cal_control *ctl);
static void headers_init(struct cal_control *ctl);
static void cal_fill_month(struct cal_month *month, const struct cal_control *ctl);
static void cal_output_header(struct cal_month *month, const struct cal_control *ctl);
static void cal_output_months(struct cal_month *month, const struct cal_control *ctl);
static void cal_vert_output_months(struct cal_month *month, const struct cal_control *ctl);
static void monthly(const struct cal_control *ctl);
static void yearly(const struct cal_control *ctl);
static int day_in_year(const struct cal_control *ctl, int day,
int month, int32_t year);
static int day_in_week(const struct cal_control *ctl, int day,
int month, int32_t year);
static int week_number(int day, int month, int32_t year, const struct cal_control *ctl);
static int week_to_day(const struct cal_control *ctl);
static int center_str(const char *src, char *dest, size_t dest_size, size_t width);
static void center(const char *str, size_t len, int separate);
static int left_str(const char *src, char *dest, size_t dest_size, size_t width);
static void left(const char *str, size_t len, int separate);
static int parse_reform_year(const char *reform_year);
static void __attribute__((__noreturn__)) usage(void);
#ifdef TEST_CAL
static time_t cal_time(time_t *t)
{
char *str = getenv("CAL_TEST_TIME");
if (str) {
uint64_t x = strtou64_or_err(str, "failed to parse CAL_TEST_TIME");
*t = x;
return *t;
}
return time(t);
}
#else
# define cal_time(t) time(t)
#endif
int main(int argc, char **argv)
{
struct tm local_time;
char *term;
time_t now;
int ch = 0, yflag = 0, Yflag = 0;
static struct cal_control ctl = {
.reform_year = DEFAULT_REFORM_YEAR,
.weekstart = SUNDAY,
.span_months = 0,
.colormode = UL_COLORMODE_UNDEF,
.weektype = WEEK_NUM_DISABLED,
.day_width = DAY_LEN,
.gutter_width = 2,
.req.day = 0,
.req.month = 0
};
enum {
OPT_COLOR = CHAR_MAX + 1,
OPT_ISO,
OPT_REFORM
};
static const struct option longopts[] = {
{"one", no_argument, NULL, '1'},
{"three", no_argument, NULL, '3'},
{"sunday", no_argument, NULL, 's'},
{"monday", no_argument, NULL, 'm'},
{"julian", no_argument, NULL, 'j'},
{"months", required_argument, NULL, 'n'},
{"span", no_argument, NULL, 'S'},
{"year", no_argument, NULL, 'y'},
{"week", optional_argument, NULL, 'w'},
{"color", optional_argument, NULL, OPT_COLOR},
{"reform", required_argument, NULL, OPT_REFORM},
{"iso", no_argument, NULL, OPT_ISO},
{"version", no_argument, NULL, 'V'},
{"twelve", no_argument, NULL, 'Y'},
{"help", no_argument, NULL, 'h'},
{"vertical", no_argument, NULL,'v'},
{NULL, 0, NULL, 0}
};
static const ul_excl_t excl[] = { /* rows and cols in ASCII order */
{ 'Y','n','y' },
{ 0 }
};
int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
close_stdout_atexit();
term = getenv("TERM");
if (term) {
has_term = setup_terminal(term) == 0;
if (has_term) {
Senter = my_tgetstr("smso");
Sexit = my_tgetstr("rmso");
}
}
/*
* The traditional Unix cal utility starts the week at Sunday,
* while ISO 8601 starts at Monday. We read the start day from
* the locale database, which can be overridden with the
* -s (Sunday) or -m (Monday) options.
*/
#if HAVE_DECL__NL_TIME_WEEK_1STDAY
/*
* You need to use 2 locale variables to get the first day of the week.
* This is needed to support first_weekday=2 and first_workday=1 for
* the rare case where working days span across 2 weeks.
* This shell script shows the combinations and calculations involved:
*
* for LANG in en_US ru_RU fr_FR csb_PL POSIX; do
* printf "%s:\t%s + %s -1 = " $LANG $(locale week-1stday first_weekday)
* date -d"$(locale week-1stday) +$(($(locale first_weekday)-1))day" +%w
* done
*
* en_US: 19971130 + 1 -1 = 0 #0 = sunday
* ru_RU: 19971130 + 2 -1 = 1
* fr_FR: 19971201 + 1 -1 = 1
* csb_PL: 19971201 + 2 -1 = 2
* POSIX: 19971201 + 7 -1 = 0
*/
{
int wfd;
union { unsigned int word; char *string; } val;
val.string = nl_langinfo(_NL_TIME_WEEK_1STDAY);
wfd = val.word;
wfd = day_in_week(&ctl, wfd % 100, (wfd / 100) % 100,
wfd / (100 * 100));
ctl.weekstart = (wfd + *nl_langinfo(_NL_TIME_FIRST_WEEKDAY) - 1) % DAYS_IN_WEEK;
}
#endif
while ((ch = getopt_long(argc, argv, "13mjn:sSywYvVh", longopts, NULL)) != -1) {
err_exclusive_options(ch, longopts, excl, excl_st);
switch(ch) {
case '1':
ctl.num_months = 1;
break;
case '3':
ctl.num_months = 3;
ctl.span_months = 1;
break;
case 's':
ctl.weekstart = SUNDAY; /* default */
break;
case 'm':
ctl.weekstart = MONDAY;
break;
case 'j':
ctl.julian = 1;
ctl.day_width = DAY_LEN + 1;
break;
case 'y':
yflag = 1;
break;
case 'Y':
Yflag = 1;
break;
case 'n':
ctl.num_months = strtou32_or_err(optarg,
_("invalid month argument"));
break;
case 'S':
ctl.span_months = 1;
break;
case 'w':
if (optarg) {
ctl.req.week = strtos32_or_err(optarg,
_("invalid week argument"));
if (ctl.req.week < 1 || 54 < ctl.req.week)
errx(EXIT_FAILURE,_("illegal week value: use 1-54"));
}
ctl.weektype = WEEK_NUM_US; /* default per weekstart */
break;
case OPT_COLOR:
ctl.colormode = UL_COLORMODE_AUTO;
if (optarg)
ctl.colormode = colormode_or_err(optarg,
_("unsupported color mode"));
break;
case OPT_REFORM:
ctl.reform_year = parse_reform_year(optarg);
break;
case OPT_ISO:
ctl.reform_year = ISO;
break;
case 'v':
ctl.vertical = 1;
break;
case 'V':
print_version(EXIT_SUCCESS);
case 'h':
usage();
default:
errtryhelp(EXIT_FAILURE);
}
}
argc -= optind;
argv += optind;
if (ctl.weektype) {
ctl.weektype = ctl.req.week & WEEK_NUM_MASK;
ctl.weektype |= (ctl.weekstart == MONDAY ? WEEK_NUM_ISO : WEEK_NUM_US);
ctl.week_width = (ctl.day_width * DAYS_IN_WEEK) + WNUM_LEN;
} else
ctl.week_width = ctl.day_width * DAYS_IN_WEEK;
/*
* The day_width includes the space between days,
* as there is no leading space, remove 1
* */
ctl.week_width -= 1;
if (argc == 1 && !isdigit_string(*argv)) {
usec_t x;
/* cal <timestamp> */
if (parse_timestamp(*argv, &x) == 0)
now = (time_t) (x / 1000000);
/* cal <monthname> */
else if ((ctl.req.month = monthname_to_number(&ctl, *argv)) > 0)
cal_time(&now); /* this year */
else
errx(EXIT_FAILURE, _("failed to parse timestamp or unknown month name: %s"), *argv);
argc = 0;
} else
cal_time(&now);
localtime_r(&now, &local_time);
switch(argc) {
case 3:
ctl.req.day = strtos32_or_err(*argv++, _("illegal day value"));
if (ctl.req.day < 1 || DAYS_IN_MONTH < ctl.req.day)
errx(EXIT_FAILURE, _("illegal day value: use 1-%d"), DAYS_IN_MONTH);
/* fallthrough */
case 2:
if (isdigit(**argv))
ctl.req.month = strtos32_or_err(*argv++, _("illegal month value: use 1-12"));
else {
ctl.req.month = monthname_to_number(&ctl, *argv);
if (ctl.req.month < 0)
errx(EXIT_FAILURE, _("unknown month name: %s"), *argv);
argv++;
}
if (ctl.req.month < 1 || MONTHS_IN_YEAR < ctl.req.month)
errx(EXIT_FAILURE, _("illegal month value: use 1-12"));
/* fallthrough */
case 1:
ctl.req.year = strtos32_or_err(*argv++, _("illegal year value"));
if (ctl.req.year < SMALLEST_YEAR)
errx(EXIT_FAILURE, _("illegal year value: use positive integer"));
if (ctl.req.year == JULIAN)
errx(EXIT_FAILURE, _("illegal year value"));
if (ctl.req.day) {
int dm = days_in_month[leap_year(&ctl, ctl.req.year)]
[ctl.req.month];
if (ctl.req.day > dm)
errx(EXIT_FAILURE, _("illegal day value: use 1-%d"), dm);
ctl.req.day = day_in_year(&ctl, ctl.req.day,
ctl.req.month, ctl.req.year);
} else if ((int32_t) (local_time.tm_year + 1900) == ctl.req.year) {
ctl.req.day = local_time.tm_yday + 1;
}
if (!ctl.req.month && !ctl.req.week) {
ctl.req.month = local_time.tm_mon + 1;
if (!ctl.num_months)
yflag = 1;
}
break;
case 0:
ctl.req.day = local_time.tm_yday + 1;
ctl.req.year = local_time.tm_year + 1900;
if (!ctl.req.month)
ctl.req.month = local_time.tm_mon + 1;
break;
default:
warnx(_("bad usage"));
errtryhelp(EXIT_FAILURE);
}
if (0 < ctl.req.week) {
int yday = week_to_day(&ctl);
int leap = leap_year(&ctl, ctl.req.year);
int m = 1;
if (yday < 1)
errx(EXIT_FAILURE, _("illegal week value: year %d "
"doesn't have week %d"),
ctl.req.year, ctl.req.week);
while (m <= DECEMBER && yday > days_in_month[leap][m])
yday -= days_in_month[leap][m++];
if (DECEMBER < m && ctl.weektype & WEEK_NUM_ISO) {
/* In some years (e.g. 2010 in ISO mode) it's possible
* to have a remnant of week 53 starting the year yet
* the year in question ends during 52, in this case
* we're assuming that early remnant is being referred
* to if 53 is given as argument. */
if (ctl.req.week != week_number(31, DECEMBER, ctl.req.year - 1, &ctl))
errx(EXIT_FAILURE,
_("illegal week value: year %d "
"doesn't have week %d"),
ctl.req.year, ctl.req.week);
}
if (!ctl.req.month)
ctl.req.month = MONTHS_IN_YEAR < m ? 1 : m;
}
weekdays_init(&ctl);
headers_init(&ctl);
if (colors_init(ctl.colormode, "cal") == 0) {
/*
* If standout mode available (Senter and Sexit are set) and
* user or terminal-colors.d do not disable colors than
* ignore colors_init().
*/
if (*Senter && *Sexit && colors_mode() != UL_COLORMODE_NEVER) {
/* let use standout mode */
;
} else {
/* disable */
Senter = ""; Sexit = "";
ctl.req.day = 0;
ctl.weektype &= ~WEEK_NUM_MASK;
}
}
if (yflag || Yflag) {
ctl.gutter_width = 3;
if (!ctl.num_months)
ctl.num_months = MONTHS_IN_YEAR;
if (yflag) {
ctl.req.start_month = 1; /* start from Jan */
ctl.header_year = 1; /* print year number */
}
}
if (ctl.vertical)
ctl.gutter_width = 1;
if (ctl.num_months > 1 && ctl.months_in_row == 0) {
ctl.months_in_row = MONTHS_IN_YEAR_ROW; /* default */
if (isatty(STDOUT_FILENO)) {
int w, mw, extra, new_n;
w = get_terminal_width(80);
mw = ctl.julian ? DOY_MONTH_WIDTH : DOM_MONTH_WIDTH;
if (w < mw)
w = mw;
extra = ((w / mw) - 1) * ctl.gutter_width;
new_n = (w - extra) / mw;
if (new_n < MONTHS_IN_YEAR_ROW)
ctl.months_in_row = new_n > 0 ? new_n : 1;
}
} else if (!ctl.months_in_row)
ctl.months_in_row = 1;
if (!ctl.num_months)
ctl.num_months = 1; /* display at least one month */
if (yflag || Yflag)
yearly(&ctl);
else
monthly(&ctl);
return EXIT_SUCCESS;
}
/* leap year -- account for gregorian reformation in 1752 */
static int leap_year(const struct cal_control *ctl, int32_t year)
{
if (year <= ctl->reform_year)
return !(year % 4);
return ( !(year % 4) && (year % 100) ) || !(year % 400);
}
static void init_monthnames(struct cal_control *ctl)
{
size_t i;
if (ctl->full_month[0] != NULL)
return; /* already initialized */
for (i = 0; i < MONTHS_IN_YEAR; i++)
ctl->full_month[i] = nl_langinfo(ALTMON_1 + i);
}
static void init_abbr_monthnames(struct cal_control *ctl)
{
size_t i;
if (ctl->abbr_month[0] != NULL)
return; /* already initialized */
for (i = 0; i < MONTHS_IN_YEAR; i++)
ctl->abbr_month[i] = nl_langinfo(_NL_ABALTMON_1 + i);
}
static int monthname_to_number(struct cal_control *ctl, const char *name)
{
size_t i;
init_monthnames(ctl);
for (i = 0; i < MONTHS_IN_YEAR; i++)
if (strcasecmp(ctl->full_month[i], name) == 0)
return i + 1;
init_abbr_monthnames(ctl);
for (i = 0; i < MONTHS_IN_YEAR; i++)
if (strcasecmp(ctl->abbr_month[i], name) == 0)
return i + 1;
return -EINVAL;
}
static void weekdays_init(struct cal_control *ctl)
{
size_t wd;
int i;
for (i = 0; i < DAYS_IN_WEEK; i++) {
wd = (i + ctl->weekstart) % DAYS_IN_WEEK;
ctl->weekdays[i] = nl_langinfo(ABDAY_1 + wd);
}
}
static void headers_init(struct cal_control *ctl)
{
size_t i;
char *cur_dh = day_headings;
char tmp[FMT_ST_CHARS];
int year_len;
year_len = snprintf(tmp, sizeof(tmp), "%04d", ctl->req.year);
if (year_len < 0 || (size_t)year_len >= sizeof(tmp)) {
/* XXX impossible error */
return;
}
for (i = 0; i < DAYS_IN_WEEK; i++) {
size_t space_left;
if (i)
strcat(cur_dh++, " ");
space_left = sizeof(day_headings) - (cur_dh - day_headings);
if (space_left <= (ctl->day_width - 1))
break;
cur_dh += center_str(ctl->weekdays[i], cur_dh,
space_left, ctl->day_width - 1);
}
init_monthnames(ctl);
for (i = 0; i < MONTHS_IN_YEAR; i++) {
/* The +1 after year_len is space in between month and year. */
if (ctl->week_width < strlen(ctl->full_month[i]) + year_len)
ctl->header_hint = 1;
}
}
static void cal_fill_month(struct cal_month *month, const struct cal_control *ctl)
{
int first_week_day = day_in_week(ctl, 1, month->month, month->year);
int month_days;
int i, j, weeklines = 0;
if (ctl->julian)
j = day_in_year(ctl, 1, month->month, month->year);
else
j = 1;
month_days = j + days_in_month[leap_year(ctl, month->year)][month->month];
/* True when Sunday is not first day in the output week. */
if (ctl->weekstart) {
first_week_day -= ctl->weekstart;
if (first_week_day < 0)
first_week_day = DAYS_IN_WEEK - ctl->weekstart;
month_days += ctl->weekstart - 1;
}
/* Fill day array. */
for (i = 0; i < MAXDAYS; i++) {
if (0 < first_week_day) {
month->days[i] = SPACE;
first_week_day--;
continue;
}
if (j < month_days) {
if (month->year == ctl->reform_year &&
month->month == REFORMATION_MONTH &&
(j == 3 || j == 247))
j += NUMBER_MISSING_DAYS;
month->days[i] = j;
j++;
continue;
}
month->days[i] = SPACE;
weeklines++;
}
/* Add week numbers */
if (ctl->weektype) {
int weeknum = week_number(1, month->month, month->year, ctl);
weeklines = MAXDAYS / DAYS_IN_WEEK - weeklines / DAYS_IN_WEEK;
for (i = 0; i < MAXDAYS / DAYS_IN_WEEK; i++) {
if (0 < weeklines) {
if (52 < weeknum)
weeknum = week_number(month->days[i * DAYS_IN_WEEK], month->month, month->year, ctl);
month->weeks[i] = weeknum++;
} else
month->weeks[i] = SPACE;
weeklines--;
}
}
}
static void cal_output_header(struct cal_month *month, const struct cal_control *ctl)
{
char out[FMT_ST_CHARS];
struct cal_month *i;
if (ctl->header_hint || ctl->header_year) {
for (i = month; i; i = i->next) {
snprintf(out, sizeof(out), "%s", ctl->full_month[i->month - 1]);
center(out, ctl->week_width, i->next == NULL ? 0 : ctl->gutter_width);
}
if (!ctl->header_year) {
fputc('\n', stdout);
for (i = month; i; i = i->next) {
snprintf(out, sizeof(out), "%04d", i->year);
center(out, ctl->week_width, i->next == NULL ? 0 : ctl->gutter_width);
}
}
} else {
for (i = month; i; i = i->next) {
snprintf(out, sizeof(out), "%s %04d", ctl->full_month[i->month - 1], i->year);
center(out, ctl->week_width, i->next == NULL ? 0 : ctl->gutter_width);
}
}
fputc('\n', stdout);
for (i = month; i; i = i->next) {
if (ctl->weektype) {
if (ctl->julian)
printf("%*s%s", (int)ctl->day_width - 1, "", day_headings);
else
printf("%*s%s", (int)ctl->day_width, "", day_headings);
} else
fputs(day_headings, stdout);
if (i->next != NULL)
printf("%*s", ctl->gutter_width, "");
}
fputc('\n', stdout);
}
static void cal_vert_output_header(struct cal_month *month,
const struct cal_control *ctl)
{
char out[FMT_ST_CHARS];
struct cal_month *m;
int month_width;
month_width = ctl->day_width * (MAXDAYS / DAYS_IN_WEEK);
/* Padding for the weekdays */
printf("%*s", (int)ctl->day_width + 1, "");
if (ctl->header_hint || ctl->header_year) {
for (m = month; m; m = m->next) {
snprintf(out, sizeof(out), "%s", ctl->full_month[m->month - 1]);
left(out, month_width, ctl->gutter_width);
}
if (!ctl->header_year) {
fputc('\n', stdout);
/* Padding for the weekdays */
printf("%*s", (int)ctl->day_width + 1, "");
for (m = month; m; m = m->next) {
snprintf(out, sizeof(out), "%04d", m->year);
left(out, month_width, ctl->gutter_width);
}
}
} else {
for (m = month; m; m = m->next) {
snprintf(out, sizeof(out), "%s %04d", ctl->full_month[m->month - 1], m->year);
left(out, month_width, ctl->gutter_width);
}
}
fputc('\n', stdout);
}
static void cal_output_months(struct cal_month *month, const struct cal_control *ctl)
{
int reqday, week_line, d;
int skip;
struct cal_month *i;
for (week_line = 0; week_line < MAXDAYS / DAYS_IN_WEEK; week_line++) {
for (i = month; i; i = i->next) {
/* Determine the day that should be highlighted. */
reqday = 0;
if (i->month == ctl->req.month && i->year == ctl->req.year) {
if (ctl->julian)
reqday = ctl->req.day;
else
reqday = ctl->req.day + 1 -
day_in_year(ctl, 1, i->month,
i->year);
}
if (ctl->weektype) {
if (0 < i->weeks[week_line]) {
if ((ctl->weektype & WEEK_NUM_MASK) == i->weeks[week_line])
printf("%s%2d%s", Senter, i->weeks[week_line], Sexit);
else
printf("%2d", i->weeks[week_line]);
} else
printf("%2s", "");
skip = ctl->day_width;
} else
/* First day of the week is one char narrower than the other days,
* unless week number is printed. */
skip = ctl->day_width - 1;
for (d = DAYS_IN_WEEK * week_line;
d < DAYS_IN_WEEK * week_line + DAYS_IN_WEEK; d++) {
if (0 < i->days[d]) {
if (reqday == i->days[d])
printf("%*s%s%*d%s",
skip - (ctl->julian ? 3 : 2),
"", Senter, (ctl->julian ? 3 : 2),
i->days[d], Sexit);
else
printf("%*d", skip, i->days[d]);
} else
printf("%*s", skip, "");
if (skip < (int)ctl->day_width)
skip++;
}
if (i->next != NULL)
printf("%*s", ctl->gutter_width, "");
}
if (i == NULL)
fputc('\n', stdout);
}
}
static void
cal_vert_output_months(struct cal_month *month, const struct cal_control *ctl)
{
int i, reqday, week, d;
int skip;
struct cal_month *m;
skip = ctl->day_width;
for (i = 0; i < DAYS_IN_WEEK; i++) {
left(ctl->weekdays[i], ctl->day_width - 1, 0);
for (m = month; m; m = m->next) {
reqday = 0;
if (m->month == ctl->req.month && m->year == ctl->req.year) {
if (ctl->julian) {
reqday = ctl->req.day;
} else {
reqday = ctl->req.day + 1 -
day_in_year(ctl, 1, m->month, m->year);
}
}
for (week = 0; week < MAXDAYS / DAYS_IN_WEEK; week++) {
d = i + DAYS_IN_WEEK * week;
if (0 < m->days[d]) {
if (reqday == m->days[d]) {
printf("%*s%s%*d%s",
skip - (ctl->julian ? 3 : 2),
"", Senter, (ctl->julian ? 3 : 2),
m->days[d], Sexit);
} else {
printf("%*d", skip, m->days[d]);
}
} else {
printf("%*s", skip, "");
}
skip = ctl->day_width;
}
if (m->next != NULL)
printf("%*s", ctl->gutter_width, "");
}
fputc('\n', stdout);
}
if (!ctl->weektype)
return;
printf("%*s", (int)ctl->day_width - 1, "");
for (m = month; m; m = m->next) {
for (week = 0; week < MAXDAYS / DAYS_IN_WEEK; week++) {
if (0 < m->weeks[week]) {
if ((ctl->weektype & WEEK_NUM_MASK) == m->weeks[week])
printf("%s%*d%s",
Senter,
skip - (ctl->julian ? 3 : 2),
m->weeks[week], Sexit);
else
printf("%*d", skip, m->weeks[week]);
} else
printf("%*s", skip, "");
}
if (m->next != NULL)
printf("%*s", ctl->gutter_width, "");
}
fputc('\n', stdout);
}
static void monthly(const struct cal_control *ctl)
{
struct cal_month m1,m2,m3, *m;
int i, rows, month = ctl->req.start_month ? ctl->req.start_month : ctl->req.month;
int32_t year = ctl->req.year;
/* cal -3, cal -Y --span, etc. */
if (ctl->span_months) {
int new_month = month - ctl->num_months / 2;
if (new_month < 1) {
new_month *= -1;
year -= (new_month / MONTHS_IN_YEAR) + 1;
if (new_month > MONTHS_IN_YEAR)
new_month %= MONTHS_IN_YEAR;
month = MONTHS_IN_YEAR - new_month;
} else
month = new_month;
}
m1.next = (ctl->months_in_row > 1) ? &m2 : NULL;
m2.next = (ctl->months_in_row > 2) ? &m3 : NULL;
m3.next = NULL;
rows = (ctl->num_months - 1) / ctl->months_in_row;
for (i = 0; i < rows + 1 ; i++){
if (i == rows){
switch (ctl->num_months % ctl->months_in_row){
case 1:
m1.next = NULL;
/* fallthrough */
case 2:
m2.next = NULL;
/* fallthrough */
}
}
for (m = &m1; m; m = m->next){
m->month = month++;
m->year = year;
if (MONTHS_IN_YEAR < month) {
year++;
month = 1;
}
cal_fill_month(m, ctl);
}
if (ctl->vertical) {
if (i > 0)
fputc('\n', stdout); /* Add a line between row */
cal_vert_output_header(&m1, ctl);
cal_vert_output_months(&m1, ctl);
} else {
cal_output_header(&m1, ctl);
cal_output_months(&m1, ctl);
}
}
}
static void yearly(const struct cal_control *ctl)
{
size_t year_width;
year_width = (size_t) ctl->months_in_row * ctl->week_width
+ ((size_t) ctl->months_in_row - 1) * ctl->gutter_width;
if (ctl->header_year) {
char out[FMT_ST_CHARS];
snprintf(out, sizeof(out), "%04d", ctl->req.year);
center(out, year_width, 0);
fputs("\n\n", stdout);
}
monthly(ctl);
}
/*
* day_in_year --
* return the 1 based day number within the year
*/
static int day_in_year(const struct cal_control *ctl,
int day, int month, int32_t year)
{
int i, leap;
leap = leap_year(ctl, year);
for (i = 1; i < month; i++)
day += days_in_month[leap][i];
return day;
}
/*
* day_in_week
* return the 0 based day number for any date from 1 Jan. 1 to
* 31 Dec. 9999. Assumes the Gregorian reformation eliminates
* 3 Sep. 1752 through 13 Sep. 1752, and returns invalid weekday
* during the period of 11 days.
*/
static int day_in_week(const struct cal_control *ctl, int day,
int month, int32_t year)
{
/*
* The magic constants in the reform[] array are, in a simplified
* sense, the remaining days after slicing into one week periods the total
* days from the beginning of the year to the target month. That is,
* weeks + reform[] days gets us to the target month. The exception is,
* that for the months past February 'DOY - 1' must be used.
*
* DoY (Day of Year): total days to the target month
*
* Month 1 2 3 4 5 6 7 8 9 10 11 12
* DoY 0 31 59 90 120 151 181 212 243 273 304 334
* DoY % 7 0 3
* DoY - 1 % 7 - -- 2 5 0 3 5 1 4 6 2 4
* reform[] = { 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 };
*
* Note: these calculations are for non leap years.
*/
static const int reform[] = { 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 };
static const int old[] = { 5, 1, 0, 3, 5, 1, 3, 6, 2, 4, 0, 2 };
if (year != ctl->reform_year + 1)
year -= month < MARCH;
else
year -= (month < MARCH) + 14;
if (ctl->reform_year < year
|| (year == ctl->reform_year && REFORMATION_MONTH < month)
|| (year == ctl->reform_year
&& month == REFORMATION_MONTH && 13 < day)) {
return ((int64_t) year + (year / 4)
- (year / 100) + (year / 400)
+ reform[month - 1] + day) % DAYS_IN_WEEK;
}
if (year < ctl->reform_year
|| (year == ctl->reform_year && month < REFORMATION_MONTH)
|| (year == ctl->reform_year && month == REFORMATION_MONTH && day < 3))
return ((int64_t) year + year / 4 + old[month - 1] + day)
% DAYS_IN_WEEK;
return NONEDAY;
}
/*
* week_number
* return the week number of a given date, 1..54.
* Supports ISO-8601 and North American modes.
* Day may be given as Julian day of the year mode, in which
* case the month is disregarded entirely.
*/
static int week_number(int day, int month, int32_t year, const struct cal_control *ctl)
{
int fday = 0, yday;
const int wday = day_in_week(ctl, 1, JANUARY, year);
if (ctl->weektype & WEEK_NUM_ISO)
fday = wday + (wday >= FRIDAY ? -2 : 5);
else {
/* WEEK_NUM_US: Jan 1 is always First week, that may
* begin previous year. That means there is very seldom
* more than 52 weeks, */
fday = wday + 6;
}
/* For julian dates the month can be set to 1, the global julian
* variable cannot be relied upon here, because we may recurse
* internally for 31.12. which would not work. */
if (day > DAYS_IN_MONTH)
month = JANUARY;
yday = day_in_year(ctl, day, month, year);
if (year == ctl->reform_year && yday >= YDAY_AFTER_MISSING)
fday -= NUMBER_MISSING_DAYS;
/* Last year is last year */
if (yday + fday < DAYS_IN_WEEK)
return week_number(31, DECEMBER, year - 1, ctl);
/* Or it could be part of the next year. The reformation year had less
* days than 365 making this check invalid, but reformation year ended
* on Sunday and in week 51, so it's ok here. */
if (ctl->weektype == WEEK_NUM_ISO && yday >= 363
&& day_in_week(ctl, day, month, year) >= MONDAY
&& day_in_week(ctl, day, month, year) <= WEDNESDAY
&& day_in_week(ctl, 31, DECEMBER, year) >= MONDAY
&& day_in_week(ctl, 31, DECEMBER, year) <= WEDNESDAY)
return week_number(1, JANUARY, year + 1, ctl);
return (yday + fday) / DAYS_IN_WEEK;
}
/*
* week_to_day
* return the yday of the first day in a given week inside
* the given year. This may be something other than Monday
* for ISO-8601 modes. For North American numbering this
* always returns a Sunday.
*/
static int week_to_day(const struct cal_control *ctl)
{
int yday, wday;
wday = day_in_week(ctl, 1, JANUARY, ctl->req.year);
yday = ctl->req.week * DAYS_IN_WEEK - wday;
if (ctl->req.year == ctl->reform_year && yday >= YDAY_AFTER_MISSING)
yday += NUMBER_MISSING_DAYS;
if (ctl->weektype & WEEK_NUM_ISO)
yday -= (wday >= FRIDAY ? -2 : 5);
else
yday -= 6; /* WEEK_NUM_US */
if (yday <= 0)
return 1;
return yday;
}
/*
* Center string, handling multibyte characters appropriately.
* In addition if the string is too large for the width it's truncated.
* The number of trailing spaces may be 1 less than the number of leading spaces.
*/
static int center_str(const char* src, char* dest,
size_t dest_size, size_t width)
{
return mbsalign(src, dest, dest_size, &width,
MBS_ALIGN_CENTER, MBA_UNIBYTE_FALLBACK);
}
static void center(const char *str, size_t len, int separate)
{
char lineout[FMT_ST_CHARS];
center_str(str, lineout, ARRAY_SIZE(lineout), len);
fputs(lineout, stdout);
if (separate)
printf("%*s", separate, "");
}
static int left_str(const char* src, char* dest,
size_t dest_size, size_t width)
{
return mbsalign(src, dest, dest_size, &width,
MBS_ALIGN_LEFT, MBA_UNIBYTE_FALLBACK);
}
static void left(const char *str, size_t len, int separate)
{
char lineout[FMT_ST_CHARS];
left_str(str, lineout, sizeof(lineout), len);
fputs(lineout, stdout);
if (separate)
printf("%*s", separate, "");
}
static int parse_reform_year(const char *reform_year)
{
size_t i;
struct reform {
char *name;
int val;
};
struct reform years[] = {
{"gregorian", GREGORIAN},
{"iso", ISO},
{"1752", GB1752},
{"julian", JULIAN},
};
for (i = 0; i < ARRAY_SIZE(years); i++) {
if (strcasecmp(reform_year, years[i].name) == 0)
return years[i].val;
}
errx(EXIT_FAILURE, "invalid --reform value: '%s'", reform_year);
}
static void __attribute__((__noreturn__)) usage(void)
{
FILE *out = stdout;
fputs(USAGE_HEADER, out);
fprintf(out, _(" %s [options] [[[day] month] year]\n"), program_invocation_short_name);
fprintf(out, _(" %s [options] <timestamp|monthname>\n"), program_invocation_short_name);
fputs(USAGE_SEPARATOR, out);
fputs(_("Display a calendar, or some part of it.\n"), out);
fputs(_("Without any arguments, display the current month.\n"), out);
fputs(USAGE_OPTIONS, out);
fputs(_(" -1, --one show only a single month (default)\n"), out);
fputs(_(" -3, --three show three months spanning the date\n"), out);
fputs(_(" -n, --months <num> show num months starting with date's month\n"), out);
fputs(_(" -S, --span span the date when displaying multiple months\n"), out);
fputs(_(" -s, --sunday Sunday as first day of week\n"), out);
fputs(_(" -m, --monday Monday as first day of week\n"), out);
fputs(_(" -j, --julian use day-of-year for all calendars\n"), out);
fputs(_(" --reform <val> Gregorian reform date (1752|gregorian|iso|julian)\n"), out);
fputs(_(" --iso alias for --reform=iso\n"), out);
fputs(_(" -y, --year show the whole year\n"), out);
fputs(_(" -Y, --twelve show the next twelve months\n"), out);
fputs(_(" -w, --week[=<num>] show US or ISO-8601 week numbers\n"), out);
fputs(_(" -v, --vertical show day vertically instead of line\n"), out);
fprintf(out,
_(" --color[=<when>] colorize messages (%s, %s or %s)\n"), "auto", "always", "never");
fprintf(out,
" %s\n", USAGE_COLORS_DEFAULT);
fputs(USAGE_SEPARATOR, out);
printf(USAGE_HELP_OPTIONS(23));
printf(USAGE_MAN_TAIL("cal(1)"));
exit(EXIT_SUCCESS);
}
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