/* * 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 * - added Native Language Support * * 2000-09-01 Michael Charles Pruznick * 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 * 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 #include #include #include #include #include #include #include #include #include #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 # elif defined(HAVE_NCURSES_TERM_H) # include # elif defined(HAVE_TERM_H) # include # 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 void my_putstring(char *s) { #if defined(HAVE_LIBNCURSES) || defined(HAVE_LIBNCURSESW) if (has_term) putp(s); else #endif fputs(s, stdout); } 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 */ 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 */ 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 */ }; 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 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 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 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'}, {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); atexit(close_stdout); 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:sSywYVh", 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': printf(UTIL_LINUX_VERSION); return 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; if (argc == 1 && !isdigit_string(*argv)) { usec_t x; /* cal */ if (parse_timestamp(*argv, &x) == 0) now = (time_t) (x / 1000000); /* cal */ 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); local_time = localtime(&now); 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; } headers_init(&ctl); if (!colors_init(ctl.colormode, "cal")) { 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.num_months > 1 && ctl.months_in_row == 0) { ctl.months_in_row = MONTHS_IN_YEAR_ROW; /* default */ if (isatty(STDOUT_FILENO)) { int w = get_terminal_width(STDOUT_FILENO); int mw = ctl.julian ? DOY_MONTH_WIDTH : DOM_MONTH_WIDTH; int extra = ((w / mw) - 1) * ctl.gutter_width; int new_n = (w - extra) / mw; if (new_n < MONTHS_IN_YEAR_ROW) ctl.months_in_row = new_n; } } 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); else 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 headers_init(struct cal_control *ctl) { size_t i, wd; 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; wd = (i + ctl->weekstart) % DAYS_IN_WEEK; 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(nl_langinfo(ABDAY_1 + wd), 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 + 1) 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 - 1, i->next == NULL ? 0 : ctl->gutter_width); } if (!ctl->header_year) { my_putstring("\n"); for (i = month; i; i = i->next) { snprintf(out, sizeof(out), "%04d", i->year); center(out, ctl->week_width - 1, 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 - 1, i->next == NULL ? 0 : ctl->gutter_width); } } my_putstring("\n"); for (i = month; i; i = i->next) { if (ctl->weektype) { if (ctl->julian) snprintf(out, sizeof(out), "%*s%s", (int)ctl->day_width - 1, "", day_headings); else snprintf(out, sizeof(out), "%*s%s", (int)ctl->day_width, "", day_headings); my_putstring(out); } else my_putstring(day_headings); if (i->next != NULL) { snprintf(out, sizeof(out), "%*s", ctl->gutter_width, ""); my_putstring(out); } } my_putstring("\n"); } static void cal_output_months(struct cal_month *month, const struct cal_control *ctl) { char out[FMT_ST_CHARS]; 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]) snprintf(out, sizeof(out), "%s%2d%s", Senter, i->weeks[week_line], Sexit); else snprintf(out, sizeof(out), "%2d", i->weeks[week_line]); } else snprintf(out, sizeof(out), "%2s", ""); my_putstring(out); 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]) snprintf(out, sizeof(out), "%*s%s%*d%s", skip - (ctl->julian ? 3 : 2), "", Senter, (ctl->julian ? 3 : 2), i->days[d], Sexit); else snprintf(out, sizeof(out), "%*d", skip, i->days[d]); } else snprintf(out, sizeof(out), "%*s", skip, ""); my_putstring(out); if (skip < (int)ctl->day_width) skip++; } if (i->next != NULL) { snprintf(out, sizeof(out), "%*s", ctl->gutter_width, ""); my_putstring(out); } } if (i == NULL) my_putstring("\n"); } } 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); } cal_output_header(&m1, ctl); cal_output_months(&m1, ctl); } } static void yearly(const struct cal_control *ctl) { char out[FMT_ST_CHARS]; int year_width = 0; year_width += (ctl->week_width + 1) * (ctl->julian ? 2 : 3); if (ctl->julian) year_width--; if (ctl->header_year) { snprintf(out, sizeof(out), "%04d", ctl->req.year); center(out, year_width, 0); my_putstring("\n\n"); } 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); my_putstring(lineout); if (separate) { snprintf(lineout, sizeof(lineout), "%*s", separate, ""); my_putstring(lineout); } } 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] \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 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 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[=] show US or ISO-8601 week numbers\n"), out); fputs(_(" --color[=] colorize messages (auto, always or never)\n"), out); 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); }