2 * Copyright (c) 1997 Wolfgang Helbig
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 static const char rcsid[] =
42 /* Width of one month with backward compatibility */
43 #define MONTH_WIDTH_B_J 27
44 #define MONTH_WIDTH_B 20
46 #define MONTH_WIDTH_J 24
47 #define MONTH_WIDTH 18
51 typedef struct date date;
54 char name[MAX_WIDTH + 1];
55 char lines[7][MAX_WIDTH + 1];
56 char weeks[MAX_WIDTH + 1];
63 /* The switches from Julian to Gregorian in some countries */
64 static struct djswitch {
65 char *cc; /* Country code according to ISO 3166 */
66 char *nm; /* Name of country */
67 date dt; /* Last day of Julian calendar */
69 {"AL", "Albania", {1912, 11, 30}},
70 {"AT", "Austria", {1583, 10, 5}},
71 {"AU", "Australia", {1752, 9, 2}},
72 {"BE", "Belgium", {1582, 12, 14}},
73 {"BG", "Bulgaria", {1916, 3, 18}},
74 {"CA", "Canada", {1752, 9, 2}},
75 {"CH", "Switzerland", {1655, 2, 28}},
76 {"CN", "China", {1911, 12, 18}},
77 {"CZ", "Czech Republic",{1584, 1, 6}},
78 {"DE", "Germany", {1700, 2, 18}},
79 {"DK", "Denmark", {1700, 2, 18}},
80 {"ES", "Spain", {1582, 10, 4}},
81 {"FI", "Finland", {1753, 2, 17}},
82 {"FR", "France", {1582, 12, 9}},
83 {"GB", "United Kingdom",{1752, 9, 2}},
84 {"GR", "Greece", {1924, 3, 9}},
85 {"HU", "Hungary", {1587, 10, 21}},
86 {"IS", "Iceland", {1700, 11, 16}},
87 {"IT", "Italy", {1582, 10, 4}},
88 {"JP", "Japan", {1918, 12, 18}},
89 {"LI", "Lithuania", {1918, 2, 1}},
90 {"LN", "Latin", {9999, 05, 31}},
91 {"LU", "Luxembourg", {1582, 12, 14}},
92 {"LV", "Latvia", {1918, 2, 1}},
93 {"NL", "Netherlands", {1582, 12, 14}},
94 {"NO", "Norway", {1700, 2, 18}},
95 {"PL", "Poland", {1582, 10, 4}},
96 {"PT", "Portugal", {1582, 10, 4}},
97 {"RO", "Romania", {1919, 3, 31}},
98 {"RU", "Russia", {1918, 1, 31}},
99 {"SI", "Slovenia", {1919, 3, 4}},
100 {"SU", "USSR", {1920, 3, 4}},
101 {"SW", "Sweden", {1753, 2, 17}},
102 {"TR", "Turkey", {1926, 12, 18}},
103 {"US", "United States", {1752, 9, 2}},
104 {"YU", "Yugoslavia", {1919, 3, 4}}
107 struct djswitch *dftswitch =
108 switches + sizeof(switches) / sizeof(struct djswitch) - 2;
109 /* default switch (should be "US") */
111 /* Table used to print day of month and week numbers */
112 char daystr[] = " 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15"
113 " 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31"
114 " 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47"
115 " 48 49 50 51 52 53";
117 /* Table used to print day of year and week numbers */
118 char jdaystr[] = " 1 2 3 4 5 6 7 8 9"
119 " 10 11 12 13 14 15 16 17 18 19"
120 " 20 21 22 23 24 25 26 27 28 29"
121 " 30 31 32 33 34 35 36 37 38 39"
122 " 40 41 42 43 44 45 46 47 48 49"
123 " 50 51 52 53 54 55 56 57 58 59"
124 " 60 61 62 63 64 65 66 67 68 69"
125 " 70 71 72 73 74 75 76 77 78 79"
126 " 80 81 82 83 84 85 86 87 88 89"
127 " 90 91 92 93 94 95 96 97 98 99"
128 " 100 101 102 103 104 105 106 107 108 109"
129 " 110 111 112 113 114 115 116 117 118 119"
130 " 120 121 122 123 124 125 126 127 128 129"
131 " 130 131 132 133 134 135 136 137 138 139"
132 " 140 141 142 143 144 145 146 147 148 149"
133 " 150 151 152 153 154 155 156 157 158 159"
134 " 160 161 162 163 164 165 166 167 168 169"
135 " 170 171 172 173 174 175 176 177 178 179"
136 " 180 181 182 183 184 185 186 187 188 189"
137 " 190 191 192 193 194 195 196 197 198 199"
138 " 200 201 202 203 204 205 206 207 208 209"
139 " 210 211 212 213 214 215 216 217 218 219"
140 " 220 221 222 223 224 225 226 227 228 229"
141 " 230 231 232 233 234 235 236 237 238 239"
142 " 240 241 242 243 244 245 246 247 248 249"
143 " 250 251 252 253 254 255 256 257 258 259"
144 " 260 261 262 263 264 265 266 267 268 269"
145 " 270 271 272 273 274 275 276 277 278 279"
146 " 280 281 282 283 284 285 286 287 288 289"
147 " 290 291 292 293 294 295 296 297 298 299"
148 " 300 301 302 303 304 305 306 307 308 309"
149 " 310 311 312 313 314 315 316 317 318 319"
150 " 320 321 322 323 324 325 326 327 328 329"
151 " 330 331 332 333 334 335 336 337 338 339"
152 " 340 341 342 343 344 345 346 347 348 349"
153 " 350 351 352 353 354 355 356 357 358 359"
154 " 360 361 362 363 364 365 366";
156 int flag_weeks; /* user wants number of week */
157 int nswitch; /* user defined switch date */
158 int nswitchb; /* switch date for backward compatibility */
160 char *center(char *s, char *t, int w);
161 void mkmonth(int year, int month, int jd_flag, struct monthlines * monthl);
162 void mkmonthb(int year, int month, int jd_flag, struct monthlines * monthl);
163 void mkweekdays(struct weekdays * wds);
165 void printeaster(int year, int julian, int orthodox);
166 void printmonth(int year, int month, int jd_flag);
167 void printmonthb(int year, int month, int jd_flag);
168 void printyear(int year, int jd_flag);
169 void printyearb(int year, int jd_flag);
170 int firstday(int y, int m);
171 date *sdate(int ndays, struct date * d);
172 date *sdateb(int ndays, struct date * d);
173 int sndays(struct date * d);
174 int sndaysb(struct date * d);
175 static void usage(void);
176 int weekdayb(int nd);
179 main(int argc, char *argv[])
181 struct djswitch *p, *q; /* to search user defined switch date */
182 date never = {10000, 1, 1}; /* outside valid range of dates */
183 date ukswitch = {1752, 9, 2};/* switch date for Great Britain */
184 int ch; /* holds the option character */
185 int m = 0; /* month */
186 int y = 0; /* year */
187 int flag_backward = 0; /* user called cal--backward compat. */
188 int flag_hole_year = 0; /* user wants the whole year */
189 int flag_julian_cal = 0; /* user wants Julian Calendar */
190 int flag_julian_day = 0; /* user wants the Julian day
192 int flag_orthodox = 0; /* use wants Orthodox easter */
193 int flag_easter = 0; /* use wants easter date */
194 char *cp; /* character pointer */
195 char *locale; /* locale to get country code */
198 * Use locale to determine the country code,
199 * and use the country code to determine the default
200 * switchdate and date format from the switches table.
202 if ((locale = setlocale(LC_TIME, "")) == NULL)
204 if (locale == NULL || locale == "C")
206 q = switches + sizeof(switches) / sizeof(struct djswitch);
207 for (p = switches; p != q; p++)
208 if ((cp = strstr(locale, p->cc)) != NULL && *(cp - 1) == '_')
211 nswitch = ndaysj(&dftswitch->dt);
213 nswitch = ndaysj(&p->dt);
219 * Get the filename portion of argv[0] and set flag_backward if
220 * this program is called "cal".
222 for (cp = argv[0]; *cp; cp++)
224 while (cp >= argv[0] && *cp != '/')
226 if (strcmp("cal", ++cp) == 0)
229 /* Set the switch date to United Kingdom if backwards compatible */
231 nswitchb = ndaysj(&ukswitch);
233 while ((ch = getopt(argc, argv, "Jejops:wy")) != -1)
238 nswitch = ndaysj(&never);
265 sizeof(switches) / sizeof(struct djswitch);
267 p != q && strcmp(p->cc, optarg) != 0; p++)
271 "%s: invalid country code", optarg);
272 nswitch = ndaysj(&(p->dt));
295 y = tm->tm_year + 1900;
305 errx(EX_USAGE, "month %d not in range 1..12", m);
309 if (y < 1 || y > 9999)
310 errx(EX_USAGE, "year %d not in range 1..9999", y);
319 printeaster(y, flag_julian_cal, flag_orthodox);
320 else if (argc == 1 || flag_hole_year)
322 printyearb(y, flag_julian_day);
324 printyear(y, flag_julian_day);
327 printmonthb(y, m, flag_julian_day);
329 printmonth(y, m, flag_julian_day);
338 fprintf(stderr, "%s\n%s\n%s\n",
339 "usage: cal [-jy] [[month] year]",
340 " ncal [-Jjpwy] [-s country_code] [[month] year]",
341 " ncal [-Jeo] [year]");
345 /* print the assumed switches for all countries */
350 int n; /* number of lines to print */
351 int m; /* offset from left to right table entry on the same line */
353 #define FSTR "%c%s %-15s%4d-%02d-%02d"
354 #define DFLT(p) ((p) == dftswitch ? '*' : ' ')
355 #define FSTRARG(p) DFLT(p), (p)->cc, (p)->nm, (p)->dt.y, (p)->dt.m, (p)->dt.d
357 n = sizeof(switches) / sizeof(struct djswitch);
360 for (p = switches; p != switches + n; p++)
361 printf(FSTR" "FSTR"\n", FSTRARG(p), FSTRARG(p+m));
363 printf(FSTR"\n", FSTRARG(p));
366 /* print the date of easter sunday */
368 printeaster(int y, int julian, int orthodox)
374 /* force orthodox easter for years before 1583 */
386 memset(&tm, 0, sizeof(tm));
387 tm.tm_year = dt.y - 1900;
388 tm.tm_mon = dt.m - 1;
390 strftime(buf, sizeof(buf), "%EF %Y", &tm);
395 printmonth(int y, int m, int jd_flag)
397 struct monthlines month;
401 mkmonth(y, m - 1, jd_flag, &month);
403 printf(" %s %d\n", month.name, y);
404 for (i = 0; i != 7; i++)
405 printf("%.2s%s\n", wds.names[i], month.lines[i]);
407 printf(" %s\n", month.weeks);
411 printmonthb(int y, int m, int jd_flag)
413 struct monthlines month;
415 char s[MAX_WIDTH], t[MAX_WIDTH];
419 mkmonthb(y, m - 1, jd_flag, &month);
422 mw = jd_flag ? MONTH_WIDTH_B_J : MONTH_WIDTH_B;
424 sprintf(s, "%s %d", month.name, y);
425 printf("%s\n", center(t, s, mw));
428 printf(" %s %s %s %s %s %s %.2s\n", wds.names[6], wds.names[0],
429 wds.names[1], wds.names[2], wds.names[3],
430 wds.names[4], wds.names[5]);
432 printf("%s%s%s%s%s%s%.2s\n", wds.names[6], wds.names[0],
433 wds.names[1], wds.names[2], wds.names[3],
434 wds.names[4], wds.names[5]);
436 for (i = 0; i != 6; i++)
437 printf("%s\n", month.lines[i]+1);
441 printyear(int y, int jd_flag)
443 struct monthlines year[12];
450 for (i = 0; i != 12; i++)
451 mkmonth(y, i, jd_flag, year + i);
453 mpl = jd_flag ? 3 : 4;
454 mw = jd_flag ? MONTH_WIDTH_J : MONTH_WIDTH;
457 printf("%s\n", center(t, s, mpl * mw));
459 for (j = 0; j != 12; j += mpl) {
462 mw, year[j + 1].name);
464 printf("%s\n", year[j + 2].name);
467 mw, year[j + 2].name,
469 for (i = 0; i != 7; i++) {
470 printf("%.2s%-*s%-*s",
472 mw, year[j].lines[i],
473 mw, year[j + 1].lines[i]);
475 printf("%s\n", year[j + 2].lines[i]);
478 mw, year[j + 2].lines[i],
479 year[j + 3].lines[i]);
483 printf(" %-*s%-*s%-s\n",
485 mw, year[j + 1].weeks,
488 printf(" %-*s%-*s%-*s%-s\n",
490 mw, year[j + 1].weeks,
491 mw, year[j + 2].weeks,
498 printyearb(int y, int jd_flag)
500 struct monthlines year[12];
507 for (i = 0; i != 12; i++)
508 mkmonthb(y, i, jd_flag, year + i);
510 mpl = jd_flag ? 2 : 3;
511 mw = jd_flag ? MONTH_WIDTH_B_J : MONTH_WIDTH_B;
514 printf("%s\n\n", center(t, s, mw * mpl + mpl));
516 for (j = 0; j != 12; j += mpl) {
517 printf("%-*s ", mw, center(s, year[j].name, mw));
519 printf("%s\n", center(s, year[j + 1].name, mw));
521 printf("%-*s %s\n", mw,
522 center(s, year[j + 1].name, mw),
523 center(t, year[j + 2].name, mw));
526 printf(" %s %s %s %s %s %s %s "
527 " %s %s %s %s %s %s %.2s\n",
528 wds.names[6], wds.names[0], wds.names[1],
529 wds.names[2], wds.names[3], wds.names[4],
531 wds.names[6], wds.names[0], wds.names[1],
532 wds.names[2], wds.names[3], wds.names[4],
535 printf("%s%s%s%s%s%s%s "
537 "%s%s%s%s%s%s%.2s\n",
538 wds.names[6], wds.names[0], wds.names[1],
539 wds.names[2], wds.names[3], wds.names[4],
541 wds.names[6], wds.names[0], wds.names[1],
542 wds.names[2], wds.names[3], wds.names[4],
544 wds.names[6], wds.names[0], wds.names[1],
545 wds.names[2], wds.names[3], wds.names[4],
547 for (i = 0; i != 6; i++) {
550 mw, year[j].lines[i]+1,
551 year[j + 1].lines[i]+1);
553 printf("%-*s %-*s %s\n",
554 mw, year[j].lines[i]+1,
555 mw, year[j + 1].lines[i]+1,
556 year[j + 2].lines[i]+1);
563 mkmonth(int y, int m, int jd_flag, struct monthlines *mlines)
566 struct tm tm; /* for strftime printing local names of
568 date dt; /* handy date */
569 int dw; /* width of numbers */
570 int first; /* first day of month */
571 int firstm; /* first day of first week of month */
572 int i, j, k; /* just indices */
573 int last; /* the first day of next month */
574 int jan1 = 0; /* the first day of this year */
575 char *ds; /* pointer to day strings (daystr or
578 /* Set name of month. */
579 memset(&tm, 0, sizeof(tm));
581 strftime(mlines->name, sizeof(mlines->name), "%OB", &tm);
584 * Set first and last to the day number of the first day of this
585 * month and the first day of next month respectively. Set jan1 to
586 * the day number of the first day of this year.
588 first = firstday(y, m + 1);
590 last = firstday(y + 1, 1);
592 last = firstday(y, m + 2);
595 jan1 = firstday(y, 1);
598 * Set firstm to the day number of monday of the first week of
599 * this month. (This might be in the last month)
601 firstm = first - weekday(first);
603 /* Set ds (daystring) and dw (daywidth) according to the jd_flag */
613 * Fill the lines with day of month or day of year (julian day)
614 * line index: i, each line is one weekday. column index: j, each
615 * column is one day number. print column index: k.
617 for (i = 0; i != 7; i++) {
618 for (j = firstm + i, k = 0; j < last; j += 7, k += dw)
624 memcpy(mlines->lines[i] + k,
627 memcpy(mlines->lines[i] + k, " ", dw);
628 mlines->lines[i][k] = '\0';
632 /* fill the weeknumbers */
634 for (j = firstm, k = 0; j < last; k += dw, j += 7)
636 memset(mlines->weeks + k, ' ', dw);
638 memcpy(mlines->weeks + k,
639 ds + week(j, &i)*dw, dw);
640 mlines->weeks[k] = '\0';
645 mkmonthb(int y, int m, int jd_flag, struct monthlines *mlines)
648 struct tm tm; /* for strftime printing local names of
650 date dt; /* handy date */
651 int dw; /* width of numbers */
652 int first; /* first day of month */
653 int firsts; /* sunday of first week of month */
654 int i, j, k; /* just indices */
655 int jan1 = 0; /* the first day of this year */
656 int last; /* the first day of next month */
657 char *ds; /* pointer to day strings (daystr or
660 /* Set ds (daystring) and dw (daywidth) according to the jd_flag */
669 /* Set name of month centered */
670 memset(&tm, 0, sizeof(tm));
672 strftime(mlines->name, sizeof(mlines->name), "%OB", &tm);
675 * Set first and last to the day number of the first day of this
676 * month and the first day of next month respectively. Set jan1 to
677 * the day number of Jan 1st of this year.
682 first = sndaysb(&dt);
702 * Set firsts to the day number of sunday of the first week of
703 * this month. (This might be in the last month)
705 firsts = first - (weekday(first)+1) % 7;
708 * Fill the lines with day of month or day of year (Julian day)
709 * line index: i, each line is one week. column index: j, each
710 * column is one day number. print column index: k.
712 for (i = 0; i != 6; i++) {
713 for (j = firsts + 7 * i, k = 0; j < last && k != dw * 7;
720 memcpy(mlines->lines[i] + k,
723 memcpy(mlines->lines[i] + k, " ", dw);
725 mlines->lines[i][1] = '\0';
727 mlines->lines[i][k] = '\0';
731 /* Put the local names of weekdays into the wds */
733 mkweekdays(struct weekdays *wds)
738 memset(&tm, 0, sizeof(tm));
740 for (i = 0; i != 7; i++) {
741 tm.tm_wday = (i+1) % 7;
742 strftime(wds->names[i], 4, "%a", &tm);
743 wds->names[i][2] = ' ';
748 * Compute the day number of the first
749 * existing date after the first day in month.
750 * (the first day in month and even the month might not exist!)
753 firstday(int y, int m)
764 if ((dt.m >= m && dt.y == y) || dt.y > y)
773 * Compute the number of days from date, obey the local switch from
774 * Julian to Gregorian if specified by the user.
777 sndays(struct date *d)
781 if (nswitch < ndaysj(d))
790 * Compute the number of days from date, obey the switch from
791 * Julian to Gregorian as used by UK and her colonies.
794 sndaysb(struct date *d)
797 if (nswitchb < ndaysj(d))
803 /* Inverse of sndays */
805 sdate(int nd, struct date *d)
809 return (gdate(nd, d));
811 return (jdate(nd, d));
814 /* Inverse of sndaysb */
816 sdateb(int nd, struct date *d)
820 return (gdate(nd, d));
822 return (jdate(nd, d));
825 /* Center string t in string s of length w by putting enough leading blanks */
827 center(char *s, char *t, int w)
831 memset(blanks, ' ', sizeof(blanks));
832 sprintf(s, "%.*s%s", (int)(w - strlen(t)) / 2, blanks, t);