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Diffstat (limited to 'misc-utils/cal.c')
| -rw-r--r-- | misc-utils/cal.c | 1303 |
1 files changed, 1303 insertions, 0 deletions
diff --git a/misc-utils/cal.c b/misc-utils/cal.c new file mode 100644 index 0000000..21ae6c6 --- /dev/null +++ b/misc-utils/cal.c @@ -0,0 +1,1303 @@ +/* + * 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" +#include "xalloc.h" + +#define DOY_MONTH_WIDTH 27 /* -j month width */ +#define DOM_MONTH_WIDTH 20 /* month width */ + +enum { + CAL_COLOR_TODAY, + CAL_COLOR_HEADER, + CAL_COLOR_WEEKNUMBER, + CAL_COLOR_WORKDAY, + CAL_COLOR_WEEKEND +}; + +static const struct { const char * const scheme; const char * dflt; } colors[] = +{ + [CAL_COLOR_TODAY] = { "today", UL_COLOR_REVERSE }, + [CAL_COLOR_WEEKNUMBER] = { "weeknumber", UL_COLOR_REVERSE }, + [CAL_COLOR_HEADER] = { "header", "" }, + [CAL_COLOR_WORKDAY] = { "workday", "" }, + [CAL_COLOR_WEEKEND] = { "weekend", "" } +}; + +static inline void cal_enable_color(int id) +{ + color_scheme_enable(colors[id].scheme, colors[id].dflt); +} + +static inline const char *cal_get_color_sequence(int id) +{ + return color_scheme_get_sequence(colors[id].scheme, colors[id].dflt); +} + +static inline void cal_disable_color(int id) +{ + const char *seq = cal_get_color_sequence(id); + if (seq && seq[0]) + color_disable(); +} + +static inline const char *cal_get_color_disable_sequence(int id) +{ + const char *seq = cal_get_color_sequence(id); + if (seq && seq[0]) + return UL_COLOR_RESET; + else + return ""; +} + +#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, +}; + +enum { + COLUMNS_MAX_THREE = -1, + COLUMNS_AUTO = -2, +}; + +/* 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; + time_t now; + int ch = 0, yflag = 0, Yflag = 0, cols = COLUMNS_MAX_THREE; + + 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'}, + {"columns", required_argument, NULL,'c'}, + {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(); + +/* + * 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:sSywYvc:Vh", 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 'c': + if (strcmp(optarg, "auto") == 0) + cols = COLUMNS_AUTO; + else + cols = strtosize_or_err(optarg, + _("failed to parse columns")); + 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) { + /* disable */ + 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 (cols > 0) + ctl.months_in_row = cols; + else 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; + + switch (cols) { + case COLUMNS_MAX_THREE: + if (new_n < MONTHS_IN_YEAR_ROW) + ctl.months_in_row = new_n > 0 ? new_n : 1; + break; + case COLUMNS_AUTO: + ctl.months_in_row = new_n > 0 ? new_n : 1; + break; + } + } + } 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; + + cal_enable_color(CAL_COLOR_HEADER); + + 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, ""); + } + cal_disable_color(CAL_COLOR_HEADER); + 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); +} + +#define fput_seq(_s) do { if ((_s) && *(_s)) fputs((_s), stdout); } while(0) + +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; + int firstwork = ctl->weekstart == SUNDAY ? 1 : 0; /* first workday in week */ + + /* Let's keep sequence cached rather than search it for each day */ + const char *seq_wo_start = cal_get_color_sequence(CAL_COLOR_WORKDAY); + const char *seq_wo_end = cal_get_color_disable_sequence(CAL_COLOR_WORKDAY); + const char *seq_we_start = cal_get_color_sequence(CAL_COLOR_WEEKEND); + const char *seq_we_end = cal_get_color_disable_sequence(CAL_COLOR_WEEKEND); + + 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", + cal_get_color_sequence(CAL_COLOR_WEEKNUMBER), + i->weeks[week_line], + cal_get_color_disable_sequence(CAL_COLOR_WEEKNUMBER)); + 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++) { + + int workday = d >= DAYS_IN_WEEK * week_line + firstwork && + d <= DAYS_IN_WEEK * week_line + firstwork + 4; + + if (0 < i->days[d]) { + fput_seq(workday ? seq_wo_start : seq_we_start); + + if (reqday == i->days[d]) + printf("%*s%s%*d%s", + skip - (ctl->julian ? 3 : 2), + "", cal_get_color_sequence(CAL_COLOR_TODAY), (ctl->julian ? 3 : 2), + i->days[d], cal_get_color_disable_sequence(CAL_COLOR_TODAY)); + else + printf("%*d", skip, i->days[d]); + + fput_seq(workday ? seq_wo_end : seq_we_end); + } 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), + "", + cal_get_color_sequence(CAL_COLOR_TODAY), + (ctl->julian ? 3 : 2), + m->days[d], + cal_get_color_disable_sequence(CAL_COLOR_TODAY)); + } 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", + cal_get_color_sequence(CAL_COLOR_WEEKNUMBER), + skip - (ctl->julian ? 3 : 2), + m->weeks[week], + cal_get_color_disable_sequence(CAL_COLOR_WEEKNUMBER)); + 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 *m, *ms; + 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; + } + + ms = xcalloc(ctl->months_in_row, sizeof(*ms)); + + for (i = 0; i < ctl->months_in_row - 1; i++) + ms[i].next = &ms[i + 1]; + + rows = (ctl->num_months - 1) / ctl->months_in_row; + for (i = 0; i < rows + 1 ; i++){ + if (i == rows && ctl->num_months % ctl->months_in_row > 0) + for (int n = (ctl->num_months % ctl->months_in_row) - 1; n < ctl->months_in_row; n++) + ms[n].next = NULL; + + for (m = ms; 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(ms, ctl); + cal_vert_output_months(ms, ctl); + } else { + cal_output_header(ms, ctl); + cal_output_months(ms, ctl); + } + } + free(ms); +} + +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); + fputs(_(" -c, --columns <width> amount of columns to use\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); +} |