1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 1997 Wolfgang Helbig
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 #include <calendar.h>
31 #include <ctype.h>
32 #include <err.h>
33 #include <langinfo.h>
34 #include <libgen.h>
35 #include <locale.h>
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <string.h>
39 #include <stdbool.h>
40 #include <sysexits.h>
41 #include <time.h>
42 #include <unistd.h>
43 #include <wchar.h>
44 #include <wctype.h>
45 #include <term.h>
46 #undef lines /* term.h defines this */
47
48 /* Width of one month with backward compatibility and in regular mode*/
49 #define MONTH_WIDTH_B_J 27
50 #define MONTH_WIDTH_B 20
51
52 #define MONTH_WIDTH_R_J 24
53 #define MONTH_WIDTH_R 18
54
55 #define MAX_WIDTH 64
56
57 typedef struct date date;
58
59 struct monthlines {
60 wchar_t name[MAX_WIDTH + 1];
61 char lines[7][MAX_WIDTH + 1];
62 char weeks[MAX_WIDTH + 1];
63 unsigned int extralen[7];
64 };
65
66 struct weekdays {
67 wchar_t names[7][4];
68 };
69
70 /* The switches from Julian to Gregorian in some countries */
71 static struct djswitch {
72 const char *cc; /* Country code according to ISO 3166 */
73 const char *nm; /* Name of country */
74 date dt; /* Last day of Julian calendar */
75 } switches[] = {
76 {"AL", "Albania", {1912, 11, 30}},
77 {"AT", "Austria", {1583, 10, 5}},
78 {"AU", "Australia", {1752, 9, 2}},
79 {"BE", "Belgium", {1582, 12, 14}},
80 {"BG", "Bulgaria", {1916, 3, 31}},
81 {"CA", "Canada", {1752, 9, 2}},
82 {"CH", "Switzerland", {1655, 2, 28}},
83 {"CN", "China", {1911, 12, 18}},
84 {"CZ", "Czech Republic",{1584, 1, 6}},
85 {"DE", "Germany", {1700, 2, 18}},
86 {"DK", "Denmark", {1700, 2, 18}},
87 {"ES", "Spain", {1582, 10, 4}},
88 {"FI", "Finland", {1753, 2, 17}},
89 {"FR", "France", {1582, 12, 9}},
90 {"GB", "United Kingdom",{1752, 9, 2}},
91 {"GR", "Greece", {1924, 3, 9}},
92 {"HU", "Hungary", {1587, 10, 21}},
93 {"IS", "Iceland", {1700, 11, 16}},
94 {"IT", "Italy", {1582, 10, 4}},
95 {"JP", "Japan", {1918, 12, 18}},
96 {"LT", "Lithuania", {1918, 2, 1}},
97 {"LU", "Luxembourg", {1582, 12, 14}},
98 {"LV", "Latvia", {1918, 2, 1}},
99 {"NL", "Netherlands", {1582, 12, 14}},
100 {"NO", "Norway", {1700, 2, 18}},
101 {"PL", "Poland", {1582, 10, 4}},
102 {"PT", "Portugal", {1582, 10, 4}},
103 {"RO", "Romania", {1919, 3, 31}},
104 {"RU", "Russia", {1918, 1, 31}},
105 {"SI", "Slovenia", {1919, 3, 4}},
106 {"SE", "Sweden", {1753, 2, 17}},
107 {"TR", "Turkey", {1926, 12, 18}},
108 {"US", "United States", {1752, 9, 2}},
109 {"YU", "Yugoslavia", {1919, 3, 4}}
110 };
111
112 static struct djswitch *dftswitch =
113 switches + sizeof(switches) / sizeof(struct djswitch) - 2;
114 /* default switch (should be "US") */
115
116 /* Table used to print day of month and week numbers */
117 static char daystr[] = " 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15"
118 " 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31"
119 " 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47"
120 " 48 49 50 51 52 53";
121
122 /* Table used to print day of year and week numbers */
123 static char jdaystr[] = " 1 2 3 4 5 6 7 8 9"
124 " 10 11 12 13 14 15 16 17 18 19"
125 " 20 21 22 23 24 25 26 27 28 29"
126 " 30 31 32 33 34 35 36 37 38 39"
127 " 40 41 42 43 44 45 46 47 48 49"
128 " 50 51 52 53 54 55 56 57 58 59"
129 " 60 61 62 63 64 65 66 67 68 69"
130 " 70 71 72 73 74 75 76 77 78 79"
131 " 80 81 82 83 84 85 86 87 88 89"
132 " 90 91 92 93 94 95 96 97 98 99"
133 " 100 101 102 103 104 105 106 107 108 109"
134 " 110 111 112 113 114 115 116 117 118 119"
135 " 120 121 122 123 124 125 126 127 128 129"
136 " 130 131 132 133 134 135 136 137 138 139"
137 " 140 141 142 143 144 145 146 147 148 149"
138 " 150 151 152 153 154 155 156 157 158 159"
139 " 160 161 162 163 164 165 166 167 168 169"
140 " 170 171 172 173 174 175 176 177 178 179"
141 " 180 181 182 183 184 185 186 187 188 189"
142 " 190 191 192 193 194 195 196 197 198 199"
143 " 200 201 202 203 204 205 206 207 208 209"
144 " 210 211 212 213 214 215 216 217 218 219"
145 " 220 221 222 223 224 225 226 227 228 229"
146 " 230 231 232 233 234 235 236 237 238 239"
147 " 240 241 242 243 244 245 246 247 248 249"
148 " 250 251 252 253 254 255 256 257 258 259"
149 " 260 261 262 263 264 265 266 267 268 269"
150 " 270 271 272 273 274 275 276 277 278 279"
151 " 280 281 282 283 284 285 286 287 288 289"
152 " 290 291 292 293 294 295 296 297 298 299"
153 " 300 301 302 303 304 305 306 307 308 309"
154 " 310 311 312 313 314 315 316 317 318 319"
155 " 320 321 322 323 324 325 326 327 328 329"
156 " 330 331 332 333 334 335 336 337 338 339"
157 " 340 341 342 343 344 345 346 347 348 349"
158 " 350 351 352 353 354 355 356 357 358 359"
159 " 360 361 362 363 364 365 366";
160
161 static int flag_nohighlight; /* user doesn't want a highlighted today */
162 static int flag_weeks; /* user wants number of week */
163 static int nswitch; /* user defined switch date */
164 static int nswitchb; /* switch date for backward compatibility */
165 static int highlightdate;
166 static bool flag_monday; /* user wants week starts on Monday */
167
168 static char *center(char *s, char *t, int w);
169 static wchar_t *wcenter(wchar_t *s, wchar_t *t, int w);
170 static int firstday(int y, int m);
171 static void highlight(char *dst, char *src, int len, int *extraletters);
172 static void mkmonthr(int year, int month, int jd_flag,
173 struct monthlines * monthl);
174 static void mkmonthb(int year, int month, int jd_flag,
175 struct monthlines * monthl);
176 static void mkweekdays(struct weekdays * wds);
177 static void monthranger(int year, int m, int jd_flag,
178 int before, int after);
179 static void monthrangeb(int year, int m, int jd_flag,
180 int before, int after);
181 static int parsemonth(const char *s, int *m, int *y);
182 static void printcc(void);
183 static void printeaster(int year, int julian, int orthodox);
184 static date *sdater(int ndays, struct date * d);
185 static date *sdateb(int ndays, struct date * d);
186 static int sndaysr(struct date * d);
187 static int sndaysb(struct date * d);
188 static void usage(void);
189
190 int
main(int argc,char * argv[])191 main(int argc, char *argv[])
192 {
193 struct djswitch *p, *q; /* to search user defined switch date */
194 date never = {10000, 1, 1}; /* outside valid range of dates */
195 date ukswitch = {1752, 9, 2};/* switch date for Great Britain */
196 date dt;
197 int ch; /* holds the option character */
198 int m = 0; /* month */
199 int y = 0; /* year */
200 int flag_backward = 0; /* user called cal--backward compat. */
201 int flag_wholeyear = 0; /* user wants the whole year */
202 int flag_julian_cal = 0; /* user wants Julian Calendar */
203 int flag_julian_day = 0; /* user wants the Julian day numbers */
204 int flag_orthodox = 0; /* user wants Orthodox easter */
205 int flag_easter = 0; /* user wants easter date */
206 int flag_3months = 0; /* user wants 3 month display (-3) */
207 int flag_after = 0; /* user wants to see months after */
208 int flag_before = 0; /* user wants to see months before */
209 int flag_specifiedmonth = 0;/* user wants to see this month (-m) */
210 int flag_givenmonth = 0; /* user has specified month [n] */
211 int flag_givenyear = 0; /* user has specified year [n] */
212 char *cp; /* character pointer */
213 char *flag_today = NULL; /* debug: use date as being today */
214 char *flag_month = NULL; /* requested month as string */
215 char *flag_highlightdate = NULL; /* debug: date to highlight */
216 int before, after;
217 const char *locale; /* locale to get country code */
218
219 flag_nohighlight = 0;
220 flag_weeks = 0;
221 flag_monday = false;
222
223 /*
224 * Use locale to determine the country code,
225 * and use the country code to determine the default
226 * switchdate and date format from the switches table.
227 */
228 if (setlocale(LC_ALL, "") == NULL)
229 warn("setlocale");
230 locale = setlocale(LC_TIME, NULL);
231 if (locale == NULL ||
232 strcmp(locale, "C") == 0 ||
233 strcmp(locale, "POSIX") == 0 ||
234 strcmp(locale, "ASCII") == 0 ||
235 strcmp(locale, "US-ASCII") == 0)
236 locale = "_US";
237 q = switches + sizeof(switches) / sizeof(struct djswitch);
238 for (p = switches; p != q; p++)
239 if ((cp = strstr(locale, p->cc)) != NULL && *(cp - 1) == '_')
240 break;
241 if (p == q) {
242 nswitch = ndaysj(&dftswitch->dt);
243 } else {
244 nswitch = ndaysj(&p->dt);
245 dftswitch = p;
246 }
247
248
249 /*
250 * Get the filename portion of argv[0] and set flag_backward if
251 * this program is called "cal".
252 */
253 if (strncmp(basename(argv[0]), "cal", strlen("cal")) == 0)
254 flag_backward = 1;
255
256 /* Set the switch date to United Kingdom if backwards compatible */
257 if (flag_backward)
258 nswitchb = ndaysj(&ukswitch);
259
260 before = after = -1;
261
262 while ((ch = getopt(argc, argv, "3A:B:Cd:eH:hjJm:Nops:wyM")) != -1)
263 switch (ch) {
264 case '3':
265 flag_3months = 1;
266 break;
267 case 'A':
268 if (flag_after > 0)
269 errx(EX_USAGE, "Double -A specified");
270 flag_after = strtol(optarg, NULL, 10);
271 if (flag_after <= 0)
272 errx(EX_USAGE,
273 "Argument to -A must be positive");
274 break;
275 case 'B':
276 if (flag_before > 0)
277 errx(EX_USAGE, "Double -B specified");
278 flag_before = strtol(optarg, NULL, 10);
279 if (flag_before <= 0)
280 errx(EX_USAGE,
281 "Argument to -B must be positive");
282 break;
283 case 'J':
284 if (flag_backward)
285 usage();
286 nswitch = ndaysj(&never);
287 flag_julian_cal = 1;
288 break;
289 case 'C':
290 flag_backward = 1;
291 break;
292 case 'N':
293 flag_backward = 0;
294 break;
295 case 'd':
296 flag_today = optarg;
297 break;
298 case 'H':
299 flag_highlightdate = optarg;
300 break;
301 case 'h':
302 flag_nohighlight = 1;
303 break;
304 case 'e':
305 if (flag_backward)
306 usage();
307 flag_easter = 1;
308 break;
309 case 'j':
310 flag_julian_day = 1;
311 break;
312 case 'M':
313 flag_monday = true;
314 break;
315 case 'm':
316 if (flag_specifiedmonth)
317 errx(EX_USAGE, "Double -m specified");
318 flag_month = optarg;
319 flag_specifiedmonth = 1;
320 break;
321 case 'o':
322 if (flag_backward)
323 usage();
324 flag_orthodox = 1;
325 flag_easter = 1;
326 break;
327 case 'p':
328 if (flag_backward)
329 usage();
330 printcc();
331 return (0);
332 break;
333 case 's':
334 if (flag_backward)
335 usage();
336 q = switches +
337 sizeof(switches) / sizeof(struct djswitch);
338 for (p = switches;
339 p != q && strcmp(p->cc, optarg) != 0; p++)
340 ;
341 if (p == q)
342 errx(EX_USAGE,
343 "%s: invalid country code", optarg);
344 nswitch = ndaysj(&(p->dt));
345 break;
346 case 'w':
347 if (flag_backward)
348 usage();
349 flag_weeks = 1;
350 break;
351 case 'y':
352 flag_wholeyear = 1;
353 break;
354 default:
355 usage();
356 }
357
358 argc -= optind;
359 argv += optind;
360
361 switch (argc) {
362 case 2:
363 if (flag_easter)
364 usage();
365 flag_month = *argv++;
366 flag_givenmonth = 1;
367 m = strtol(flag_month, NULL, 10);
368 /* FALLTHROUGH */
369 case 1:
370 y = atoi(*argv);
371 if (y < 1 || y > 9999)
372 errx(EX_USAGE, "year `%s' not in range 1..9999", *argv);
373 argv++;
374 flag_givenyear = 1;
375 break;
376 case 0:
377 if (flag_today != NULL) {
378 y = strtol(flag_today, NULL, 10);
379 m = strtol(flag_today + 5, NULL, 10);
380 } else {
381 time_t t;
382 struct tm *tm;
383
384 t = time(NULL);
385 tm = localtime(&t);
386 y = tm->tm_year + 1900;
387 m = tm->tm_mon + 1;
388 }
389 break;
390 default:
391 usage();
392 }
393
394 if (flag_month != NULL) {
395 if (parsemonth(flag_month, &m, &y)) {
396 errx(EX_USAGE,
397 "%s is neither a month number (1..12) nor a name",
398 flag_month);
399 }
400 }
401
402 /*
403 * What is not supported:
404 * -3 with -A or -B
405 * -3 displays 3 months, -A and -B change that behaviour.
406 * -3 with -y
407 * -3 displays 3 months, -y says display a whole year.
408 * -3 with a given year but no given month or without -m
409 * -3 displays 3 months, no month specified doesn't make clear
410 * which three months.
411 * -m with a given month
412 * conflicting arguments, both specify the same field.
413 * -y with -m
414 * -y displays the whole year, -m displays a single month.
415 * -y with a given month
416 * -y displays the whole year, the given month displays a single
417 * month.
418 * -y with -A or -B
419 * -y displays the whole year, -A and -B display extra months.
420 */
421
422 /* -3 together with -A or -B. */
423 if (flag_3months && (flag_after || flag_before))
424 errx(EX_USAGE, "-3 together with -A and -B is not supported.");
425 /* -3 together with -y. */
426 if (flag_3months && flag_wholeyear)
427 errx(EX_USAGE, "-3 together with -y is not supported.");
428 /* -3 together with givenyear but no givenmonth. */
429 if (flag_3months && flag_givenyear &&
430 !(flag_givenmonth || flag_specifiedmonth))
431 errx(EX_USAGE,
432 "-3 together with a given year but no given month is "
433 "not supported.");
434 /* -m together with xx xxxx. */
435 if (flag_specifiedmonth && flag_givenmonth)
436 errx(EX_USAGE,
437 "-m together with a given month is not supported.");
438 /* -y together with -m. */
439 if (flag_wholeyear && flag_specifiedmonth)
440 errx(EX_USAGE, "-y together with -m is not supported.");
441 /* -y together with xx xxxx. */
442 if (flag_wholeyear && flag_givenmonth)
443 errx(EX_USAGE, "-y together a given month is not supported.");
444 /* -y together with -A or -B. */
445 if (flag_wholeyear && (flag_before > 0 || flag_after > 0))
446 errx(EX_USAGE, "-y together a -A or -B is not supported.");
447 /* The rest should be fine. */
448
449 /* Select the period to display, in order of increasing priority .*/
450 if (flag_wholeyear ||
451 (flag_givenyear && !(flag_givenmonth || flag_specifiedmonth))) {
452 m = 1;
453 before = 0;
454 after = 11;
455 }
456 if (flag_givenyear && flag_givenmonth) {
457 before = 0;
458 after = 0;
459 }
460 if (flag_specifiedmonth) {
461 before = 0;
462 after = 0;
463 }
464 if (flag_before) {
465 before = flag_before;
466 }
467 if (flag_after) {
468 after = flag_after;
469 }
470 if (flag_3months) {
471 before = 1;
472 after = 1;
473 }
474 if (after == -1)
475 after = 0;
476 if (before == -1)
477 before = 0;
478
479 /* Highlight a specified day or today .*/
480 if (flag_highlightdate != NULL) {
481 dt.y = strtol(flag_highlightdate, NULL, 10);
482 dt.m = strtol(flag_highlightdate + 5, NULL, 10);
483 dt.d = strtol(flag_highlightdate + 8, NULL, 10);
484 } else {
485 time_t t;
486 struct tm *tm1;
487
488 t = time(NULL);
489 tm1 = localtime(&t);
490 dt.y = tm1->tm_year + 1900;
491 dt.m = tm1->tm_mon + 1;
492 dt.d = tm1->tm_mday;
493 }
494 highlightdate = sndaysb(&dt);
495
496 /* And now we finally start to calculate and output calendars. */
497 if (flag_easter)
498 printeaster(y, flag_julian_cal, flag_orthodox);
499 else
500 if (flag_backward)
501 monthrangeb(y, m, flag_julian_day, before, after);
502 else
503 monthranger(y, m, flag_julian_day, before, after);
504 if (ferror(stdout) != 0 || fflush(stdout) != 0)
505 err(1, "stdout");
506 return (0);
507 }
508
509 static void
usage(void)510 usage(void)
511 {
512
513 fputs(
514 "Usage: cal [general options] [-hjy] [[month] year]\n"
515 " cal [general options] [-hj] [-m month] [year]\n"
516 " ncal [general options] [-hJjpwy] [-s country_code] [[month] year]\n"
517 " ncal [general options] [-hJeo] [year]\n"
518 "General options: [-NCM3] [-A months] [-B months]\n"
519 "For debug the highlighting: [-H yyyy-mm-dd] [-d yyyy-mm]\n",
520 stderr);
521 exit(EX_USAGE);
522 }
523
524 /* Print the assumed switches for all countries. */
525 static void
printcc(void)526 printcc(void)
527 {
528 struct djswitch *p;
529 int n; /* number of lines to print */
530 int m; /* offset from left to right table entry on the same line */
531
532 #define FSTR "%c%s %-15s%4d-%02d-%02d"
533 #define DFLT(p) ((p) == dftswitch ? '*' : ' ')
534 #define FSTRARG(p) DFLT(p), (p)->cc, (p)->nm, (p)->dt.y, (p)->dt.m, (p)->dt.d
535
536 n = sizeof(switches) / sizeof(struct djswitch);
537 m = (n + 1) / 2;
538 n /= 2;
539 for (p = switches; p != switches + n; p++)
540 printf(FSTR" "FSTR"\n", FSTRARG(p), FSTRARG(p+m));
541 if (m != n)
542 printf(FSTR"\n", FSTRARG(p));
543 }
544
545 /* Print the date of easter sunday. */
546 static void
printeaster(int y,int julian,int orthodox)547 printeaster(int y, int julian, int orthodox)
548 {
549 date dt;
550 struct tm tm;
551 char buf[MAX_WIDTH];
552 static int d_first = -1;
553
554 if (d_first < 0)
555 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
556 /* force orthodox easter for years before 1583 */
557 if (y < 1583)
558 orthodox = 1;
559
560 if (orthodox)
561 if (julian)
562 easteroj(y, &dt);
563 else
564 easterog(y, &dt);
565 else
566 easterg(y, &dt);
567
568 memset(&tm, 0, sizeof(tm));
569 tm.tm_year = dt.y - 1900;
570 tm.tm_mon = dt.m - 1;
571 tm.tm_mday = dt.d;
572 strftime(buf, sizeof(buf), d_first ? "%e %B %Y" : "%B %e %Y", &tm);
573 printf("%s\n", buf);
574 }
575
576 #define MW(mw, me) ((mw) + me)
577 #define DECREASEMONTH(m, y) \
578 if (--m == 0) { \
579 m = 12; \
580 y--; \
581 }
582 #define INCREASEMONTH(m, y) \
583 if (++(m) == 13) { \
584 (m) = 1; \
585 (y)++; \
586 }
587 #define M2Y(m) ((m) / 12)
588 #define M2M(m) (1 + (m) % 12)
589
590 /* Print all months for the period in the range [ before .. y-m .. after ]. */
591 static void
monthrangeb(int y,int m,int jd_flag,int before,int after)592 monthrangeb(int y, int m, int jd_flag, int before, int after)
593 {
594 struct monthlines year[12];
595 struct weekdays wds;
596 char s[MAX_WIDTH], t[MAX_WIDTH];
597 wchar_t ws[MAX_WIDTH], ws1[MAX_WIDTH];
598 const char *wdss;
599 int i, j;
600 int mpl;
601 int mw;
602 int m1, m2;
603 int printyearheader;
604 int prevyear = -1;
605
606 mpl = jd_flag ? 2 : 3;
607 mw = jd_flag ? MONTH_WIDTH_B_J : MONTH_WIDTH_B;
608 wdss = (mpl == 2) ? " " : "";
609
610 while (before != 0) {
611 DECREASEMONTH(m, y);
612 before--;
613 after++;
614 }
615 m1 = y * 12 + m - 1;
616 m2 = m1 + after;
617
618 mkweekdays(&wds);
619
620 /*
621 * The year header is printed when there are more than 'mpl' months
622 * and if the first month is a multitude of 'mpl'.
623 * If not, it will print the year behind every month.
624 */
625 printyearheader = (after >= mpl - 1) && (M2M(m1) - 1) % mpl == 0;
626
627 m = m1;
628 while (m <= m2) {
629 int count = 0;
630 for (i = 0; i != mpl && m + i <= m2; i++) {
631 mkmonthb(M2Y(m + i), M2M(m + i) - 1, jd_flag, year + i);
632 count++;
633 }
634
635 /* Empty line between two rows of months */
636 if (m != m1)
637 printf("\n");
638
639 /* Year at the top. */
640 if (printyearheader && M2Y(m) != prevyear) {
641 sprintf(s, "%d", M2Y(m));
642 printf("%s\n", center(t, s, mpl * mw));
643 prevyear = M2Y(m);
644 }
645
646 /* Month names. */
647 for (i = 0; i < count; i++)
648 if (printyearheader)
649 wprintf(L"%-*ls ",
650 mw, wcenter(ws, year[i].name, mw));
651 else {
652 swprintf(ws, sizeof(ws)/sizeof(ws[0]),
653 L"%-ls %d", year[i].name, M2Y(m + i));
654 wprintf(L"%-*ls ", mw, wcenter(ws1, ws, mw));
655 }
656 printf("\n");
657
658 /* Day of the week names. */
659 for (i = 0; i < count; i++) {
660 wprintf(L"%s%ls%s%ls%s%ls%s%ls%s%ls%s%ls%s%ls ",
661 wdss, wds.names[flag_monday ? 0 : 6],
662 wdss, wds.names[flag_monday ? 1 : 0],
663 wdss, wds.names[flag_monday ? 2 : 1],
664 wdss, wds.names[flag_monday ? 3 : 2],
665 wdss, wds.names[flag_monday ? 4 : 3],
666 wdss, wds.names[flag_monday ? 5 : 4],
667 wdss, wds.names[flag_monday ? 6 : 5]);
668 }
669 printf("\n");
670
671 /* And the days of the month. */
672 for (i = 0; i != 6; i++) {
673 for (j = 0; j < count; j++)
674 printf("%-*s ",
675 MW(mw, year[j].extralen[i]),
676 year[j].lines[i]+1);
677 printf("\n");
678 }
679
680 m += mpl;
681 }
682 }
683
684 static void
monthranger(int y,int m,int jd_flag,int before,int after)685 monthranger(int y, int m, int jd_flag, int before, int after)
686 {
687 struct monthlines year[12];
688 struct weekdays wds;
689 char s[MAX_WIDTH], t[MAX_WIDTH];
690 int i, j;
691 int mpl;
692 int mw;
693 int m1, m2;
694 int prevyear = -1;
695 int printyearheader;
696
697 mpl = jd_flag ? 3 : 4;
698 mw = jd_flag ? MONTH_WIDTH_R_J : MONTH_WIDTH_R;
699
700 while (before != 0) {
701 DECREASEMONTH(m, y);
702 before--;
703 after++;
704 }
705 m1 = y * 12 + m - 1;
706 m2 = m1 + after;
707
708 mkweekdays(&wds);
709
710 /*
711 * The year header is printed when there are more than 'mpl' months
712 * and if the first month is a multitude of 'mpl'.
713 * If not, it will print the year behind every month.
714 */
715 printyearheader = (after >= mpl - 1) && (M2M(m1) - 1) % mpl == 0;
716
717 m = m1;
718 while (m <= m2) {
719 int count = 0;
720 for (i = 0; i != mpl && m + i <= m2; i++) {
721 mkmonthr(M2Y(m + i), M2M(m + i) - 1, jd_flag, year + i);
722 count++;
723 }
724
725 /* Empty line between two rows of months. */
726 if (m != m1)
727 printf("\n");
728
729 /* Year at the top. */
730 if (printyearheader && M2Y(m) != prevyear) {
731 sprintf(s, "%d", M2Y(m));
732 printf("%s\n", center(t, s, mpl * mw));
733 prevyear = M2Y(m);
734 }
735
736 /* Month names. */
737 wprintf(L" ");
738 for (i = 0; i < count; i++)
739 if (printyearheader)
740 wprintf(L"%-*ls", mw, year[i].name);
741 else
742 wprintf(L"%-ls %-*d", year[i].name,
743 mw - wcslen(year[i].name) - 1, M2Y(m + i));
744 printf("\n");
745
746 /* And the days of the month. */
747 for (i = 0; i != 7; i++) {
748 /* Week day */
749 wprintf(L"%.2ls", wds.names[i]);
750
751 /* Full months */
752 for (j = 0; j < count; j++)
753 printf("%-*s",
754 MW(mw, year[j].extralen[i]),
755 year[j].lines[i]);
756 printf("\n");
757 }
758
759 /* Week numbers. */
760 if (flag_weeks) {
761 printf(" ");
762 for (i = 0; i < count; i++)
763 printf("%-*s", mw, year[i].weeks);
764 printf("\n");
765 }
766
767 m += mpl;
768 }
769 return;
770 }
771
772 static void
mkmonthr(int y,int m,int jd_flag,struct monthlines * mlines)773 mkmonthr(int y, int m, int jd_flag, struct monthlines *mlines)
774 {
775
776 struct tm tm; /* for strftime printing local names of
777 * months */
778 date dt; /* handy date */
779 int dw; /* width of numbers */
780 int first; /* first day of month */
781 int firstm; /* first day of first week of month */
782 int i, j, k, l; /* just indices */
783 int last; /* the first day of next month */
784 int jan1 = 0; /* the first day of this year */
785 char *ds; /* pointer to day strings (daystr or
786 * jdaystr) */
787
788 /* Set name of month. */
789 memset(&tm, 0, sizeof(tm));
790 tm.tm_mon = m;
791 wcsftime(mlines->name, sizeof(mlines->name) / sizeof(mlines->name[0]),
792 L"%OB", &tm);
793 mlines->name[0] = towupper(mlines->name[0]);
794
795 /*
796 * Set first and last to the day number of the first day of this
797 * month and the first day of next month respectively. Set jan1 to
798 * the day number of the first day of this year.
799 */
800 first = firstday(y, m + 1);
801 if (m == 11)
802 last = firstday(y + 1, 1);
803 else
804 last = firstday(y, m + 2);
805
806 if (jd_flag)
807 jan1 = firstday(y, 1);
808
809 /*
810 * Set firstm to the day number of monday of the first week of
811 * this month. (This might be in the last month)
812 */
813 firstm = first - weekday(first);
814
815 /* Set ds (daystring) and dw (daywidth) according to the jd_flag. */
816 if (jd_flag) {
817 ds = jdaystr;
818 dw = 4;
819 } else {
820 ds = daystr;
821 dw = 3;
822 }
823
824 /*
825 * Fill the lines with day of month or day of year (julian day)
826 * line index: i, each line is one weekday. column index: j, each
827 * column is one day number. print column index: k.
828 */
829 for (i = 0; i != 7; i++) {
830 l = 0;
831 for (j = firstm + i, k = 0; j < last; j += 7, k += dw) {
832 if (j >= first) {
833 if (jd_flag)
834 dt.d = j - jan1 + 1;
835 else
836 sdater(j, &dt);
837 if (j == highlightdate && !flag_nohighlight
838 && isatty(STDOUT_FILENO))
839 highlight(mlines->lines[i] + k,
840 ds + dt.d * dw, dw, &l);
841 else
842 memcpy(mlines->lines[i] + k + l,
843 ds + dt.d * dw, dw);
844 } else
845 memcpy(mlines->lines[i] + k + l, " ", dw);
846 }
847 mlines->lines[i][k + l] = '\0';
848 mlines->extralen[i] = l;
849 }
850
851 /* fill the weeknumbers. */
852 if (flag_weeks) {
853 for (j = firstm, k = 0; j < last; k += dw, j += 7)
854 if (j <= nswitch)
855 memset(mlines->weeks + k, ' ', dw);
856 else
857 memcpy(mlines->weeks + k,
858 ds + week(j, &i)*dw, dw);
859 mlines->weeks[k] = '\0';
860 }
861 }
862
863 static void
mkmonthb(int y,int m,int jd_flag,struct monthlines * mlines)864 mkmonthb(int y, int m, int jd_flag, struct monthlines *mlines)
865 {
866
867 struct tm tm; /* for strftime printing local names of
868 * months */
869 date dt; /* handy date */
870 int dw; /* width of numbers */
871 int first; /* first day of month */
872 int firstsm; /* sunday or monday of first week of month */
873 int i, j, k, l; /* just indices */
874 int jan1 = 0; /* the first day of this year */
875 int last; /* the first day of next month */
876 char *ds; /* pointer to day strings (daystr or
877 * jdaystr) */
878
879 /* Set ds (daystring) and dw (daywidth) according to the jd_flag */
880 if (jd_flag) {
881 ds = jdaystr;
882 dw = 4;
883 } else {
884 ds = daystr;
885 dw = 3;
886 }
887
888 /* Set name of month centered. */
889 memset(&tm, 0, sizeof(tm));
890 tm.tm_mon = m;
891 wcsftime(mlines->name, sizeof(mlines->name) / sizeof(mlines->name[0]),
892 L"%OB", &tm);
893 mlines->name[0] = towupper(mlines->name[0]);
894
895 /*
896 * Set first and last to the day number of the first day of this
897 * month and the first day of next month respectively. Set jan1 to
898 * the day number of Jan 1st of this year.
899 */
900 dt.y = y;
901 dt.m = m + 1;
902 dt.d = 1;
903 first = sndaysb(&dt);
904 if (m == 11) {
905 dt.y = y + 1;
906 dt.m = 1;
907 dt.d = 1;
908 } else {
909 dt.y = y;
910 dt.m = m + 2;
911 dt.d = 1;
912 }
913 last = sndaysb(&dt);
914
915 if (jd_flag) {
916 dt.y = y;
917 dt.m = 1;
918 dt.d = 1;
919 jan1 = sndaysb(&dt);
920 }
921
922 /*
923 * Set firstsm to the day number of sunday or monday of the first week
924 * of this month. (This might be in the last month)
925 */
926 if (flag_monday)
927 firstsm = first - weekday(first);
928 else
929 firstsm = first - (weekday(first) + 1) % 7;
930
931 /*
932 * Fill the lines with day of month or day of year (Julian day)
933 * line index: i, each line is one week. column index: j, each
934 * column is one day number. print column index: k.
935 */
936 for (i = 0; i != 6; i++) {
937 l = 0;
938 for (j = firstsm + 7 * i, k = 0; j < last && k != dw * 7;
939 j++, k += dw) {
940 if (j >= first) {
941 if (jd_flag)
942 dt.d = j - jan1 + 1;
943 else
944 sdateb(j, &dt);
945 if (j == highlightdate && !flag_nohighlight
946 && isatty(STDOUT_FILENO))
947 highlight(mlines->lines[i] + k,
948 ds + dt.d * dw, dw, &l);
949 else
950 memcpy(mlines->lines[i] + k + l,
951 ds + dt.d * dw, dw);
952 } else
953 memcpy(mlines->lines[i] + k + l, " ", dw);
954 }
955 if (k == 0)
956 mlines->lines[i][1] = '\0';
957 else
958 mlines->lines[i][k + l] = '\0';
959 mlines->extralen[i] = l;
960 }
961 }
962
963 /* Put the local names of weekdays into the wds. */
964 static void
mkweekdays(struct weekdays * wds)965 mkweekdays(struct weekdays *wds)
966 {
967 int i, len, width = 0;
968 struct tm tm;
969 wchar_t buf[20];
970
971 memset(&tm, 0, sizeof(tm));
972
973 for (i = 0; i != 7; i++) {
974 tm.tm_wday = (i+1) % 7;
975 wcsftime(buf, sizeof(buf)/sizeof(buf[0]), L"%a", &tm);
976 for (len = 2; len > 0; --len) {
977 if ((width = wcswidth(buf, len)) <= 2)
978 break;
979 }
980 wmemset(wds->names[i], L'\0', 4);
981 if (width == 1)
982 wds->names[i][0] = L' ';
983 wcsncat(wds->names[i], buf, len);
984 wcsncat(wds->names[i], L" ", 1);
985 }
986 }
987
988 /*
989 * Compute the day number of the first existing date after the first day in
990 * month. (the first day in month and even the month might not exist!)
991 */
992 static int
firstday(int y,int m)993 firstday(int y, int m)
994 {
995 date dt;
996 int nd;
997
998 dt.y = y;
999 dt.m = m;
1000 dt.d = 1;
1001 nd = sndaysr(&dt);
1002 for (;;) {
1003 sdater(nd, &dt);
1004 if ((dt.m >= m && dt.y == y) || dt.y > y)
1005 return (nd);
1006 else
1007 nd++;
1008 }
1009 /* NEVER REACHED */
1010 }
1011
1012 /*
1013 * Compute the number of days from date, obey the local switch from
1014 * Julian to Gregorian if specified by the user.
1015 */
1016 static int
sndaysr(struct date * d)1017 sndaysr(struct date *d)
1018 {
1019
1020 if (nswitch != 0)
1021 if (nswitch < ndaysj(d))
1022 return (ndaysg(d));
1023 else
1024 return (ndaysj(d));
1025 else
1026 return ndaysg(d);
1027 }
1028
1029 /*
1030 * Compute the number of days from date, obey the switch from
1031 * Julian to Gregorian as used by UK and her colonies.
1032 */
1033 static int
sndaysb(struct date * d)1034 sndaysb(struct date *d)
1035 {
1036
1037 if (nswitchb < ndaysj(d))
1038 return (ndaysg(d));
1039 else
1040 return (ndaysj(d));
1041 }
1042
1043 /* Inverse of sndays. */
1044 static struct date *
sdater(int nd,struct date * d)1045 sdater(int nd, struct date *d)
1046 {
1047
1048 if (nswitch < nd)
1049 return (gdate(nd, d));
1050 else
1051 return (jdate(nd, d));
1052 }
1053
1054 /* Inverse of sndaysb. */
1055 static struct date *
sdateb(int nd,struct date * d)1056 sdateb(int nd, struct date *d)
1057 {
1058
1059 if (nswitchb < nd)
1060 return (gdate(nd, d));
1061 else
1062 return (jdate(nd, d));
1063 }
1064
1065 /* Center string t in string s of length w by putting enough leading blanks. */
1066 static char *
center(char * s,char * t,int w)1067 center(char *s, char *t, int w)
1068 {
1069 char blanks[MAX_WIDTH];
1070
1071 memset(blanks, ' ', sizeof(blanks));
1072 sprintf(s, "%.*s%s", (int)(w - strlen(t)) / 2, blanks, t);
1073 return (s);
1074 }
1075
1076 /* Center string t in string s of length w by putting enough leading blanks. */
1077 static wchar_t *
wcenter(wchar_t * s,wchar_t * t,int w)1078 wcenter(wchar_t *s, wchar_t *t, int w)
1079 {
1080 char blanks[MAX_WIDTH];
1081
1082 memset(blanks, ' ', sizeof(blanks));
1083 swprintf(s, MAX_WIDTH, L"%.*s%ls", (int)(w - wcslen(t)) / 2, blanks, t);
1084 return (s);
1085 }
1086
1087 static int
parsemonth(const char * s,int * m,int * y)1088 parsemonth(const char *s, int *m, int *y)
1089 {
1090 int nm, ny;
1091 char *cp;
1092 struct tm tm;
1093
1094 nm = (int)strtol(s, &cp, 10);
1095 if (cp != s) {
1096 ny = *y;
1097 if (*cp == '\0') {
1098 ; /* no special action */
1099 } else if (*cp == 'f' || *cp == 'F') {
1100 if (nm <= *m)
1101 ny++;
1102 } else if (*cp == 'p' || *cp == 'P') {
1103 if (nm >= *m)
1104 ny--;
1105 } else
1106 return (1);
1107 if (nm < 1 || nm > 12)
1108 return 1;
1109 *m = nm;
1110 *y = ny;
1111 return (0);
1112 }
1113 if (strptime(s, "%B", &tm) != NULL || strptime(s, "%b", &tm) != NULL) {
1114 *m = tm.tm_mon + 1;
1115 return (0);
1116 }
1117 return (1);
1118 }
1119
1120 static void
highlight(char * dst,char * src,int len,int * extralen)1121 highlight(char *dst, char *src, int len, int *extralen)
1122 {
1123 static int first = 1;
1124 static const char *term_so, *term_se;
1125
1126 if (first) {
1127 static char cbuf[512];
1128 char tbuf[1024], *b;
1129
1130 term_se = term_so = NULL;
1131
1132 /* On how to highlight on this type of terminal (if any). */
1133 if (isatty(STDOUT_FILENO) && tgetent(tbuf, NULL) == 1) {
1134 b = cbuf;
1135 term_so = tgetstr("so", &b);
1136 term_se = tgetstr("se", &b);
1137 }
1138
1139 first = 0;
1140 }
1141
1142 /*
1143 * This check is not necessary, should have been handled before calling
1144 * this function.
1145 */
1146 if (flag_nohighlight) {
1147 memcpy(dst, src, len);
1148 return;
1149 }
1150
1151 /*
1152 * If it is a real terminal, use the data from the termcap database.
1153 */
1154 if (term_so != NULL && term_se != NULL) {
1155 /* separator. */
1156 dst[0] = ' ';
1157 dst++;
1158 /* highlight on. */
1159 memcpy(dst, term_so, strlen(term_so));
1160 dst += strlen(term_so);
1161 /* the actual text. (minus leading space) */
1162 len--;
1163 src++;
1164 memcpy(dst, src, len);
1165 dst += len;
1166 /* highlight off. */
1167 memcpy(dst, term_se, strlen(term_se));
1168 *extralen = strlen(term_so) + strlen(term_se);
1169 return;
1170 }
1171
1172 /*
1173 * Otherwise, print a _, backspace and the letter.
1174 */
1175 *extralen = 0;
1176 /* skip leading space. */
1177 src++;
1178 len--;
1179 /* separator. */
1180 dst[0] = ' ';
1181 dst++;
1182 while (len > 0) {
1183 /* _ and backspace. */
1184 memcpy(dst, "_\010", 2);
1185 dst += 2;
1186 *extralen += 2;
1187 /* the character. */
1188 *dst++ = *src++;
1189 len--;
1190 }
1191 return;
1192 }
1193