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 <sysexits.h>
40 #include <time.h>
41 #include <unistd.h>
42 #include <wchar.h>
43 #include <wctype.h>
44 #include <term.h>
45 #undef lines /* term.h defines this */
46
47 /* Width of one month with backward compatibility and in regular mode*/
48 #define MONTH_WIDTH_B_J 27
49 #define MONTH_WIDTH_B 20
50
51 #define MONTH_WIDTH_R_J 24
52 #define MONTH_WIDTH_R 18
53
54 #define MAX_WIDTH 64
55
56 typedef struct date date;
57
58 struct monthlines {
59 wchar_t name[MAX_WIDTH + 1];
60 char lines[7][MAX_WIDTH + 1];
61 char weeks[MAX_WIDTH + 1];
62 unsigned int extralen[7];
63 };
64
65 struct weekdays {
66 wchar_t names[7][4];
67 };
68
69 /* The switches from Julian to Gregorian in some countries */
70 static struct djswitch {
71 const char *cc; /* Country code according to ISO 3166 */
72 const char *nm; /* Name of country */
73 date dt; /* Last day of Julian calendar */
74 } switches[] = {
75 {"AL", "Albania", {1912, 11, 30}},
76 {"AT", "Austria", {1583, 10, 5}},
77 {"AU", "Australia", {1752, 9, 2}},
78 {"BE", "Belgium", {1582, 12, 14}},
79 {"BG", "Bulgaria", {1916, 3, 31}},
80 {"CA", "Canada", {1752, 9, 2}},
81 {"CH", "Switzerland", {1655, 2, 28}},
82 {"CN", "China", {1911, 12, 18}},
83 {"CZ", "Czech Republic",{1584, 1, 6}},
84 {"DE", "Germany", {1700, 2, 18}},
85 {"DK", "Denmark", {1700, 2, 18}},
86 {"ES", "Spain", {1582, 10, 4}},
87 {"FI", "Finland", {1753, 2, 17}},
88 {"FR", "France", {1582, 12, 9}},
89 {"GB", "United Kingdom",{1752, 9, 2}},
90 {"GR", "Greece", {1924, 3, 9}},
91 {"HU", "Hungary", {1587, 10, 21}},
92 {"IS", "Iceland", {1700, 11, 16}},
93 {"IT", "Italy", {1582, 10, 4}},
94 {"JP", "Japan", {1918, 12, 18}},
95 {"LT", "Lithuania", {1918, 2, 1}},
96 {"LU", "Luxembourg", {1582, 12, 14}},
97 {"LV", "Latvia", {1918, 2, 1}},
98 {"NL", "Netherlands", {1582, 12, 14}},
99 {"NO", "Norway", {1700, 2, 18}},
100 {"PL", "Poland", {1582, 10, 4}},
101 {"PT", "Portugal", {1582, 10, 4}},
102 {"RO", "Romania", {1919, 3, 31}},
103 {"RU", "Russia", {1918, 1, 31}},
104 {"SI", "Slovenia", {1919, 3, 4}},
105 {"SE", "Sweden", {1753, 2, 17}},
106 {"TR", "Turkey", {1926, 12, 18}},
107 {"US", "United States", {1752, 9, 2}},
108 {"YU", "Yugoslavia", {1919, 3, 4}}
109 };
110
111 static struct djswitch *dftswitch =
112 switches + sizeof(switches) / sizeof(struct djswitch) - 2;
113 /* default switch (should be "US") */
114
115 /* Table used to print day of month and week numbers */
116 static char daystr[] = " 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15"
117 " 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31"
118 " 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47"
119 " 48 49 50 51 52 53";
120
121 /* Table used to print day of year and week numbers */
122 static char jdaystr[] = " 1 2 3 4 5 6 7 8 9"
123 " 10 11 12 13 14 15 16 17 18 19"
124 " 20 21 22 23 24 25 26 27 28 29"
125 " 30 31 32 33 34 35 36 37 38 39"
126 " 40 41 42 43 44 45 46 47 48 49"
127 " 50 51 52 53 54 55 56 57 58 59"
128 " 60 61 62 63 64 65 66 67 68 69"
129 " 70 71 72 73 74 75 76 77 78 79"
130 " 80 81 82 83 84 85 86 87 88 89"
131 " 90 91 92 93 94 95 96 97 98 99"
132 " 100 101 102 103 104 105 106 107 108 109"
133 " 110 111 112 113 114 115 116 117 118 119"
134 " 120 121 122 123 124 125 126 127 128 129"
135 " 130 131 132 133 134 135 136 137 138 139"
136 " 140 141 142 143 144 145 146 147 148 149"
137 " 150 151 152 153 154 155 156 157 158 159"
138 " 160 161 162 163 164 165 166 167 168 169"
139 " 170 171 172 173 174 175 176 177 178 179"
140 " 180 181 182 183 184 185 186 187 188 189"
141 " 190 191 192 193 194 195 196 197 198 199"
142 " 200 201 202 203 204 205 206 207 208 209"
143 " 210 211 212 213 214 215 216 217 218 219"
144 " 220 221 222 223 224 225 226 227 228 229"
145 " 230 231 232 233 234 235 236 237 238 239"
146 " 240 241 242 243 244 245 246 247 248 249"
147 " 250 251 252 253 254 255 256 257 258 259"
148 " 260 261 262 263 264 265 266 267 268 269"
149 " 270 271 272 273 274 275 276 277 278 279"
150 " 280 281 282 283 284 285 286 287 288 289"
151 " 290 291 292 293 294 295 296 297 298 299"
152 " 300 301 302 303 304 305 306 307 308 309"
153 " 310 311 312 313 314 315 316 317 318 319"
154 " 320 321 322 323 324 325 326 327 328 329"
155 " 330 331 332 333 334 335 336 337 338 339"
156 " 340 341 342 343 344 345 346 347 348 349"
157 " 350 351 352 353 354 355 356 357 358 359"
158 " 360 361 362 363 364 365 366";
159
160 static int flag_nohighlight; /* user doesn't want a highlighted today */
161 static int flag_weeks; /* user wants number of week */
162 static int nswitch; /* user defined switch date */
163 static int nswitchb; /* switch date for backward compatibility */
164 static int highlightdate;
165
166 static char *center(char *s, char *t, int w);
167 static wchar_t *wcenter(wchar_t *s, wchar_t *t, int w);
168 static int firstday(int y, int m);
169 static void highlight(char *dst, char *src, int len, int *extraletters);
170 static void mkmonthr(int year, int month, int jd_flag,
171 struct monthlines * monthl);
172 static void mkmonthb(int year, int month, int jd_flag,
173 struct monthlines * monthl);
174 static void mkweekdays(struct weekdays * wds);
175 static void monthranger(int year, int m, int jd_flag,
176 int before, int after);
177 static void monthrangeb(int year, int m, int jd_flag,
178 int before, int after);
179 static int parsemonth(const char *s, int *m, int *y);
180 static void printcc(void);
181 static void printeaster(int year, int julian, int orthodox);
182 static date *sdater(int ndays, struct date * d);
183 static date *sdateb(int ndays, struct date * d);
184 static int sndaysr(struct date * d);
185 static int sndaysb(struct date * d);
186 static void usage(void);
187
188 int
main(int argc,char * argv[])189 main(int argc, char *argv[])
190 {
191 struct djswitch *p, *q; /* to search user defined switch date */
192 date never = {10000, 1, 1}; /* outside valid range of dates */
193 date ukswitch = {1752, 9, 2};/* switch date for Great Britain */
194 date dt;
195 int ch; /* holds the option character */
196 int m = 0; /* month */
197 int y = 0; /* year */
198 int flag_backward = 0; /* user called cal--backward compat. */
199 int flag_wholeyear = 0; /* user wants the whole year */
200 int flag_julian_cal = 0; /* user wants Julian Calendar */
201 int flag_julian_day = 0; /* user wants the Julian day numbers */
202 int flag_orthodox = 0; /* user wants Orthodox easter */
203 int flag_easter = 0; /* user wants easter date */
204 int flag_3months = 0; /* user wants 3 month display (-3) */
205 int flag_after = 0; /* user wants to see months after */
206 int flag_before = 0; /* user wants to see months before */
207 int flag_specifiedmonth = 0;/* user wants to see this month (-m) */
208 int flag_givenmonth = 0; /* user has specified month [n] */
209 int flag_givenyear = 0; /* user has specified year [n] */
210 char *cp; /* character pointer */
211 char *flag_today = NULL; /* debug: use date as being today */
212 char *flag_month = NULL; /* requested month as string */
213 char *flag_highlightdate = NULL; /* debug: date to highlight */
214 int before, after;
215 const char *locale; /* locale to get country code */
216
217 flag_nohighlight = 0;
218 flag_weeks = 0;
219
220 /*
221 * Use locale to determine the country code,
222 * and use the country code to determine the default
223 * switchdate and date format from the switches table.
224 */
225 if (setlocale(LC_ALL, "") == NULL)
226 warn("setlocale");
227 locale = setlocale(LC_TIME, NULL);
228 if (locale == NULL ||
229 strcmp(locale, "C") == 0 ||
230 strcmp(locale, "POSIX") == 0 ||
231 strcmp(locale, "ASCII") == 0 ||
232 strcmp(locale, "US-ASCII") == 0)
233 locale = "_US";
234 q = switches + sizeof(switches) / sizeof(struct djswitch);
235 for (p = switches; p != q; p++)
236 if ((cp = strstr(locale, p->cc)) != NULL && *(cp - 1) == '_')
237 break;
238 if (p == q) {
239 nswitch = ndaysj(&dftswitch->dt);
240 } else {
241 nswitch = ndaysj(&p->dt);
242 dftswitch = p;
243 }
244
245
246 /*
247 * Get the filename portion of argv[0] and set flag_backward if
248 * this program is called "cal".
249 */
250 if (strncmp(basename(argv[0]), "cal", strlen("cal")) == 0)
251 flag_backward = 1;
252
253 /* Set the switch date to United Kingdom if backwards compatible */
254 if (flag_backward)
255 nswitchb = ndaysj(&ukswitch);
256
257 before = after = -1;
258
259 while ((ch = getopt(argc, argv, "3A:B:Cd:eH:hjJm:Nops:wy")) != -1)
260 switch (ch) {
261 case '3':
262 flag_3months = 1;
263 break;
264 case 'A':
265 if (flag_after > 0)
266 errx(EX_USAGE, "Double -A specified");
267 flag_after = strtol(optarg, NULL, 10);
268 if (flag_after <= 0)
269 errx(EX_USAGE,
270 "Argument to -A must be positive");
271 break;
272 case 'B':
273 if (flag_before > 0)
274 errx(EX_USAGE, "Double -B specified");
275 flag_before = strtol(optarg, NULL, 10);
276 if (flag_before <= 0)
277 errx(EX_USAGE,
278 "Argument to -B must be positive");
279 break;
280 case 'J':
281 if (flag_backward)
282 usage();
283 nswitch = ndaysj(&never);
284 flag_julian_cal = 1;
285 break;
286 case 'C':
287 flag_backward = 1;
288 break;
289 case 'N':
290 flag_backward = 0;
291 break;
292 case 'd':
293 flag_today = optarg;
294 break;
295 case 'H':
296 flag_highlightdate = optarg;
297 break;
298 case 'h':
299 flag_nohighlight = 1;
300 break;
301 case 'e':
302 if (flag_backward)
303 usage();
304 flag_easter = 1;
305 break;
306 case 'j':
307 flag_julian_day = 1;
308 break;
309 case 'm':
310 if (flag_specifiedmonth)
311 errx(EX_USAGE, "Double -m specified");
312 flag_month = optarg;
313 flag_specifiedmonth = 1;
314 break;
315 case 'o':
316 if (flag_backward)
317 usage();
318 flag_orthodox = 1;
319 flag_easter = 1;
320 break;
321 case 'p':
322 if (flag_backward)
323 usage();
324 printcc();
325 return (0);
326 break;
327 case 's':
328 if (flag_backward)
329 usage();
330 q = switches +
331 sizeof(switches) / sizeof(struct djswitch);
332 for (p = switches;
333 p != q && strcmp(p->cc, optarg) != 0; p++)
334 ;
335 if (p == q)
336 errx(EX_USAGE,
337 "%s: invalid country code", optarg);
338 nswitch = ndaysj(&(p->dt));
339 break;
340 case 'w':
341 if (flag_backward)
342 usage();
343 flag_weeks = 1;
344 break;
345 case 'y':
346 flag_wholeyear = 1;
347 break;
348 default:
349 usage();
350 }
351
352 argc -= optind;
353 argv += optind;
354
355 switch (argc) {
356 case 2:
357 if (flag_easter)
358 usage();
359 flag_month = *argv++;
360 flag_givenmonth = 1;
361 m = strtol(flag_month, NULL, 10);
362 /* FALLTHROUGH */
363 case 1:
364 y = atoi(*argv);
365 if (y < 1 || y > 9999)
366 errx(EX_USAGE, "year `%s' not in range 1..9999", *argv);
367 argv++;
368 flag_givenyear = 1;
369 break;
370 case 0:
371 if (flag_today != NULL) {
372 y = strtol(flag_today, NULL, 10);
373 m = strtol(flag_today + 5, NULL, 10);
374 } else {
375 time_t t;
376 struct tm *tm;
377
378 t = time(NULL);
379 tm = localtime(&t);
380 y = tm->tm_year + 1900;
381 m = tm->tm_mon + 1;
382 }
383 break;
384 default:
385 usage();
386 }
387
388 if (flag_month != NULL) {
389 if (parsemonth(flag_month, &m, &y)) {
390 errx(EX_USAGE,
391 "%s is neither a month number (1..12) nor a name",
392 flag_month);
393 }
394 }
395
396 /*
397 * What is not supported:
398 * -3 with -A or -B
399 * -3 displays 3 months, -A and -B change that behaviour.
400 * -3 with -y
401 * -3 displays 3 months, -y says display a whole year.
402 * -3 with a given year but no given month or without -m
403 * -3 displays 3 months, no month specified doesn't make clear
404 * which three months.
405 * -m with a given month
406 * conflicting arguments, both specify the same field.
407 * -y with -m
408 * -y displays the whole year, -m displays a single month.
409 * -y with a given month
410 * -y displays the whole year, the given month displays a single
411 * month.
412 * -y with -A or -B
413 * -y displays the whole year, -A and -B display extra months.
414 */
415
416 /* -3 together with -A or -B. */
417 if (flag_3months && (flag_after || flag_before))
418 errx(EX_USAGE, "-3 together with -A and -B is not supported.");
419 /* -3 together with -y. */
420 if (flag_3months && flag_wholeyear)
421 errx(EX_USAGE, "-3 together with -y is not supported.");
422 /* -3 together with givenyear but no givenmonth. */
423 if (flag_3months && flag_givenyear &&
424 !(flag_givenmonth || flag_specifiedmonth))
425 errx(EX_USAGE,
426 "-3 together with a given year but no given month is "
427 "not supported.");
428 /* -m together with xx xxxx. */
429 if (flag_specifiedmonth && flag_givenmonth)
430 errx(EX_USAGE,
431 "-m together with a given month is not supported.");
432 /* -y together with -m. */
433 if (flag_wholeyear && flag_specifiedmonth)
434 errx(EX_USAGE, "-y together with -m is not supported.");
435 /* -y together with xx xxxx. */
436 if (flag_wholeyear && flag_givenmonth)
437 errx(EX_USAGE, "-y together a given month is not supported.");
438 /* -y together with -A or -B. */
439 if (flag_wholeyear && (flag_before > 0 || flag_after > 0))
440 errx(EX_USAGE, "-y together a -A or -B is not supported.");
441 /* The rest should be fine. */
442
443 /* Select the period to display, in order of increasing priority .*/
444 if (flag_wholeyear ||
445 (flag_givenyear && !(flag_givenmonth || flag_specifiedmonth))) {
446 m = 1;
447 before = 0;
448 after = 11;
449 }
450 if (flag_givenyear && flag_givenmonth) {
451 before = 0;
452 after = 0;
453 }
454 if (flag_specifiedmonth) {
455 before = 0;
456 after = 0;
457 }
458 if (flag_before) {
459 before = flag_before;
460 }
461 if (flag_after) {
462 after = flag_after;
463 }
464 if (flag_3months) {
465 before = 1;
466 after = 1;
467 }
468 if (after == -1)
469 after = 0;
470 if (before == -1)
471 before = 0;
472
473 /* Highlight a specified day or today .*/
474 if (flag_highlightdate != NULL) {
475 dt.y = strtol(flag_highlightdate, NULL, 10);
476 dt.m = strtol(flag_highlightdate + 5, NULL, 10);
477 dt.d = strtol(flag_highlightdate + 8, NULL, 10);
478 } else {
479 time_t t;
480 struct tm *tm1;
481
482 t = time(NULL);
483 tm1 = localtime(&t);
484 dt.y = tm1->tm_year + 1900;
485 dt.m = tm1->tm_mon + 1;
486 dt.d = tm1->tm_mday;
487 }
488 highlightdate = sndaysb(&dt);
489
490 /* And now we finally start to calculate and output calendars. */
491 if (flag_easter)
492 printeaster(y, flag_julian_cal, flag_orthodox);
493 else
494 if (flag_backward)
495 monthrangeb(y, m, flag_julian_day, before, after);
496 else
497 monthranger(y, m, flag_julian_day, before, after);
498 if (ferror(stdout) != 0 || fflush(stdout) != 0)
499 err(1, "stdout");
500 return (0);
501 }
502
503 static void
usage(void)504 usage(void)
505 {
506
507 fputs(
508 "Usage: cal [general options] [-hjy] [[month] year]\n"
509 " cal [general options] [-hj] [-m month] [year]\n"
510 " ncal [general options] [-hJjpwy] [-s country_code] [[month] year]\n"
511 " ncal [general options] [-hJeo] [year]\n"
512 "General options: [-NC3] [-A months] [-B months]\n"
513 "For debug the highlighting: [-H yyyy-mm-dd] [-d yyyy-mm]\n",
514 stderr);
515 exit(EX_USAGE);
516 }
517
518 /* Print the assumed switches for all countries. */
519 static void
printcc(void)520 printcc(void)
521 {
522 struct djswitch *p;
523 int n; /* number of lines to print */
524 int m; /* offset from left to right table entry on the same line */
525
526 #define FSTR "%c%s %-15s%4d-%02d-%02d"
527 #define DFLT(p) ((p) == dftswitch ? '*' : ' ')
528 #define FSTRARG(p) DFLT(p), (p)->cc, (p)->nm, (p)->dt.y, (p)->dt.m, (p)->dt.d
529
530 n = sizeof(switches) / sizeof(struct djswitch);
531 m = (n + 1) / 2;
532 n /= 2;
533 for (p = switches; p != switches + n; p++)
534 printf(FSTR" "FSTR"\n", FSTRARG(p), FSTRARG(p+m));
535 if (m != n)
536 printf(FSTR"\n", FSTRARG(p));
537 }
538
539 /* Print the date of easter sunday. */
540 static void
printeaster(int y,int julian,int orthodox)541 printeaster(int y, int julian, int orthodox)
542 {
543 date dt;
544 struct tm tm;
545 char buf[MAX_WIDTH];
546 static int d_first = -1;
547
548 if (d_first < 0)
549 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
550 /* force orthodox easter for years before 1583 */
551 if (y < 1583)
552 orthodox = 1;
553
554 if (orthodox)
555 if (julian)
556 easteroj(y, &dt);
557 else
558 easterog(y, &dt);
559 else
560 easterg(y, &dt);
561
562 memset(&tm, 0, sizeof(tm));
563 tm.tm_year = dt.y - 1900;
564 tm.tm_mon = dt.m - 1;
565 tm.tm_mday = dt.d;
566 strftime(buf, sizeof(buf), d_first ? "%e %B %Y" : "%B %e %Y", &tm);
567 printf("%s\n", buf);
568 }
569
570 #define MW(mw, me) ((mw) + me)
571 #define DECREASEMONTH(m, y) \
572 if (--m == 0) { \
573 m = 12; \
574 y--; \
575 }
576 #define INCREASEMONTH(m, y) \
577 if (++(m) == 13) { \
578 (m) = 1; \
579 (y)++; \
580 }
581 #define M2Y(m) ((m) / 12)
582 #define M2M(m) (1 + (m) % 12)
583
584 /* Print all months for the period in the range [ before .. y-m .. after ]. */
585 static void
monthrangeb(int y,int m,int jd_flag,int before,int after)586 monthrangeb(int y, int m, int jd_flag, int before, int after)
587 {
588 struct monthlines year[12];
589 struct weekdays wds;
590 char s[MAX_WIDTH], t[MAX_WIDTH];
591 wchar_t ws[MAX_WIDTH], ws1[MAX_WIDTH];
592 const char *wdss;
593 int i, j;
594 int mpl;
595 int mw;
596 int m1, m2;
597 int printyearheader;
598 int prevyear = -1;
599
600 mpl = jd_flag ? 2 : 3;
601 mw = jd_flag ? MONTH_WIDTH_B_J : MONTH_WIDTH_B;
602 wdss = (mpl == 2) ? " " : "";
603
604 while (before != 0) {
605 DECREASEMONTH(m, y);
606 before--;
607 after++;
608 }
609 m1 = y * 12 + m - 1;
610 m2 = m1 + after;
611
612 mkweekdays(&wds);
613
614 /*
615 * The year header is printed when there are more than 'mpl' months
616 * and if the first month is a multitude of 'mpl'.
617 * If not, it will print the year behind every month.
618 */
619 printyearheader = (after >= mpl - 1) && (M2M(m1) - 1) % mpl == 0;
620
621 m = m1;
622 while (m <= m2) {
623 int count = 0;
624 for (i = 0; i != mpl && m + i <= m2; i++) {
625 mkmonthb(M2Y(m + i), M2M(m + i) - 1, jd_flag, year + i);
626 count++;
627 }
628
629 /* Empty line between two rows of months */
630 if (m != m1)
631 printf("\n");
632
633 /* Year at the top. */
634 if (printyearheader && M2Y(m) != prevyear) {
635 sprintf(s, "%d", M2Y(m));
636 printf("%s\n", center(t, s, mpl * mw));
637 prevyear = M2Y(m);
638 }
639
640 /* Month names. */
641 for (i = 0; i < count; i++)
642 if (printyearheader)
643 wprintf(L"%-*ls ",
644 mw, wcenter(ws, year[i].name, mw));
645 else {
646 swprintf(ws, sizeof(ws)/sizeof(ws[0]),
647 L"%-ls %d", year[i].name, M2Y(m + i));
648 wprintf(L"%-*ls ", mw, wcenter(ws1, ws, mw));
649 }
650 printf("\n");
651
652 /* Day of the week names. */
653 for (i = 0; i < count; i++) {
654 wprintf(L"%s%ls%s%ls%s%ls%s%ls%s%ls%s%ls%s%ls ",
655 wdss, wds.names[6], wdss, wds.names[0],
656 wdss, wds.names[1], wdss, wds.names[2],
657 wdss, wds.names[3], wdss, wds.names[4],
658 wdss, wds.names[5]);
659 }
660 printf("\n");
661
662 /* And the days of the month. */
663 for (i = 0; i != 6; i++) {
664 for (j = 0; j < count; j++)
665 printf("%-*s ",
666 MW(mw, year[j].extralen[i]),
667 year[j].lines[i]+1);
668 printf("\n");
669 }
670
671 m += mpl;
672 }
673 }
674
675 static void
monthranger(int y,int m,int jd_flag,int before,int after)676 monthranger(int y, int m, int jd_flag, int before, int after)
677 {
678 struct monthlines year[12];
679 struct weekdays wds;
680 char s[MAX_WIDTH], t[MAX_WIDTH];
681 int i, j;
682 int mpl;
683 int mw;
684 int m1, m2;
685 int prevyear = -1;
686 int printyearheader;
687
688 mpl = jd_flag ? 3 : 4;
689 mw = jd_flag ? MONTH_WIDTH_R_J : MONTH_WIDTH_R;
690
691 while (before != 0) {
692 DECREASEMONTH(m, y);
693 before--;
694 after++;
695 }
696 m1 = y * 12 + m - 1;
697 m2 = m1 + after;
698
699 mkweekdays(&wds);
700
701 /*
702 * The year header is printed when there are more than 'mpl' months
703 * and if the first month is a multitude of 'mpl'.
704 * If not, it will print the year behind every month.
705 */
706 printyearheader = (after >= mpl - 1) && (M2M(m1) - 1) % mpl == 0;
707
708 m = m1;
709 while (m <= m2) {
710 int count = 0;
711 for (i = 0; i != mpl && m + i <= m2; i++) {
712 mkmonthr(M2Y(m + i), M2M(m + i) - 1, jd_flag, year + i);
713 count++;
714 }
715
716 /* Empty line between two rows of months. */
717 if (m != m1)
718 printf("\n");
719
720 /* Year at the top. */
721 if (printyearheader && M2Y(m) != prevyear) {
722 sprintf(s, "%d", M2Y(m));
723 printf("%s\n", center(t, s, mpl * mw));
724 prevyear = M2Y(m);
725 }
726
727 /* Month names. */
728 wprintf(L" ");
729 for (i = 0; i < count; i++)
730 if (printyearheader)
731 wprintf(L"%-*ls", mw, year[i].name);
732 else
733 wprintf(L"%-ls %-*d", year[i].name,
734 mw - wcslen(year[i].name) - 1, M2Y(m + i));
735 printf("\n");
736
737 /* And the days of the month. */
738 for (i = 0; i != 7; i++) {
739 /* Week day */
740 wprintf(L"%.2ls", wds.names[i]);
741
742 /* Full months */
743 for (j = 0; j < count; j++)
744 printf("%-*s",
745 MW(mw, year[j].extralen[i]),
746 year[j].lines[i]);
747 printf("\n");
748 }
749
750 /* Week numbers. */
751 if (flag_weeks) {
752 printf(" ");
753 for (i = 0; i < count; i++)
754 printf("%-*s", mw, year[i].weeks);
755 printf("\n");
756 }
757
758 m += mpl;
759 }
760 return;
761 }
762
763 static void
mkmonthr(int y,int m,int jd_flag,struct monthlines * mlines)764 mkmonthr(int y, int m, int jd_flag, struct monthlines *mlines)
765 {
766
767 struct tm tm; /* for strftime printing local names of
768 * months */
769 date dt; /* handy date */
770 int dw; /* width of numbers */
771 int first; /* first day of month */
772 int firstm; /* first day of first week of month */
773 int i, j, k, l; /* just indices */
774 int last; /* the first day of next month */
775 int jan1 = 0; /* the first day of this year */
776 char *ds; /* pointer to day strings (daystr or
777 * jdaystr) */
778
779 /* Set name of month. */
780 memset(&tm, 0, sizeof(tm));
781 tm.tm_mon = m;
782 wcsftime(mlines->name, sizeof(mlines->name) / sizeof(mlines->name[0]),
783 L"%OB", &tm);
784 mlines->name[0] = towupper(mlines->name[0]);
785
786 /*
787 * Set first and last to the day number of the first day of this
788 * month and the first day of next month respectively. Set jan1 to
789 * the day number of the first day of this year.
790 */
791 first = firstday(y, m + 1);
792 if (m == 11)
793 last = firstday(y + 1, 1);
794 else
795 last = firstday(y, m + 2);
796
797 if (jd_flag)
798 jan1 = firstday(y, 1);
799
800 /*
801 * Set firstm to the day number of monday of the first week of
802 * this month. (This might be in the last month)
803 */
804 firstm = first - weekday(first);
805
806 /* Set ds (daystring) and dw (daywidth) according to the jd_flag. */
807 if (jd_flag) {
808 ds = jdaystr;
809 dw = 4;
810 } else {
811 ds = daystr;
812 dw = 3;
813 }
814
815 /*
816 * Fill the lines with day of month or day of year (julian day)
817 * line index: i, each line is one weekday. column index: j, each
818 * column is one day number. print column index: k.
819 */
820 for (i = 0; i != 7; i++) {
821 l = 0;
822 for (j = firstm + i, k = 0; j < last; j += 7, k += dw) {
823 if (j >= first) {
824 if (jd_flag)
825 dt.d = j - jan1 + 1;
826 else
827 sdater(j, &dt);
828 if (j == highlightdate && !flag_nohighlight
829 && isatty(STDOUT_FILENO))
830 highlight(mlines->lines[i] + k,
831 ds + dt.d * dw, dw, &l);
832 else
833 memcpy(mlines->lines[i] + k + l,
834 ds + dt.d * dw, dw);
835 } else
836 memcpy(mlines->lines[i] + k + l, " ", dw);
837 }
838 mlines->lines[i][k + l] = '\0';
839 mlines->extralen[i] = l;
840 }
841
842 /* fill the weeknumbers. */
843 if (flag_weeks) {
844 for (j = firstm, k = 0; j < last; k += dw, j += 7)
845 if (j <= nswitch)
846 memset(mlines->weeks + k, ' ', dw);
847 else
848 memcpy(mlines->weeks + k,
849 ds + week(j, &i)*dw, dw);
850 mlines->weeks[k] = '\0';
851 }
852 }
853
854 static void
mkmonthb(int y,int m,int jd_flag,struct monthlines * mlines)855 mkmonthb(int y, int m, int jd_flag, struct monthlines *mlines)
856 {
857
858 struct tm tm; /* for strftime printing local names of
859 * months */
860 date dt; /* handy date */
861 int dw; /* width of numbers */
862 int first; /* first day of month */
863 int firsts; /* sunday of first week of month */
864 int i, j, k, l; /* just indices */
865 int jan1 = 0; /* the first day of this year */
866 int last; /* the first day of next month */
867 char *ds; /* pointer to day strings (daystr or
868 * jdaystr) */
869
870 /* Set ds (daystring) and dw (daywidth) according to the jd_flag */
871 if (jd_flag) {
872 ds = jdaystr;
873 dw = 4;
874 } else {
875 ds = daystr;
876 dw = 3;
877 }
878
879 /* Set name of month centered. */
880 memset(&tm, 0, sizeof(tm));
881 tm.tm_mon = m;
882 wcsftime(mlines->name, sizeof(mlines->name) / sizeof(mlines->name[0]),
883 L"%OB", &tm);
884 mlines->name[0] = towupper(mlines->name[0]);
885
886 /*
887 * Set first and last to the day number of the first day of this
888 * month and the first day of next month respectively. Set jan1 to
889 * the day number of Jan 1st of this year.
890 */
891 dt.y = y;
892 dt.m = m + 1;
893 dt.d = 1;
894 first = sndaysb(&dt);
895 if (m == 11) {
896 dt.y = y + 1;
897 dt.m = 1;
898 dt.d = 1;
899 } else {
900 dt.y = y;
901 dt.m = m + 2;
902 dt.d = 1;
903 }
904 last = sndaysb(&dt);
905
906 if (jd_flag) {
907 dt.y = y;
908 dt.m = 1;
909 dt.d = 1;
910 jan1 = sndaysb(&dt);
911 }
912
913 /*
914 * Set firsts to the day number of sunday of the first week of
915 * this month. (This might be in the last month)
916 */
917 firsts = first - (weekday(first)+1) % 7;
918
919 /*
920 * Fill the lines with day of month or day of year (Julian day)
921 * line index: i, each line is one week. column index: j, each
922 * column is one day number. print column index: k.
923 */
924 for (i = 0; i != 6; i++) {
925 l = 0;
926 for (j = firsts + 7 * i, k = 0; j < last && k != dw * 7;
927 j++, k += dw) {
928 if (j >= first) {
929 if (jd_flag)
930 dt.d = j - jan1 + 1;
931 else
932 sdateb(j, &dt);
933 if (j == highlightdate && !flag_nohighlight
934 && isatty(STDOUT_FILENO))
935 highlight(mlines->lines[i] + k,
936 ds + dt.d * dw, dw, &l);
937 else
938 memcpy(mlines->lines[i] + k + l,
939 ds + dt.d * dw, dw);
940 } else
941 memcpy(mlines->lines[i] + k + l, " ", dw);
942 }
943 if (k == 0)
944 mlines->lines[i][1] = '\0';
945 else
946 mlines->lines[i][k + l] = '\0';
947 mlines->extralen[i] = l;
948 }
949 }
950
951 /* Put the local names of weekdays into the wds. */
952 static void
mkweekdays(struct weekdays * wds)953 mkweekdays(struct weekdays *wds)
954 {
955 int i, len, width = 0;
956 struct tm tm;
957 wchar_t buf[20];
958
959 memset(&tm, 0, sizeof(tm));
960
961 for (i = 0; i != 7; i++) {
962 tm.tm_wday = (i+1) % 7;
963 wcsftime(buf, sizeof(buf)/sizeof(buf[0]), L"%a", &tm);
964 for (len = 2; len > 0; --len) {
965 if ((width = wcswidth(buf, len)) <= 2)
966 break;
967 }
968 wmemset(wds->names[i], L'\0', 4);
969 if (width == 1)
970 wds->names[i][0] = L' ';
971 wcsncat(wds->names[i], buf, len);
972 wcsncat(wds->names[i], L" ", 1);
973 }
974 }
975
976 /*
977 * Compute the day number of the first existing date after the first day in
978 * month. (the first day in month and even the month might not exist!)
979 */
980 static int
firstday(int y,int m)981 firstday(int y, int m)
982 {
983 date dt;
984 int nd;
985
986 dt.y = y;
987 dt.m = m;
988 dt.d = 1;
989 nd = sndaysr(&dt);
990 for (;;) {
991 sdater(nd, &dt);
992 if ((dt.m >= m && dt.y == y) || dt.y > y)
993 return (nd);
994 else
995 nd++;
996 }
997 /* NEVER REACHED */
998 }
999
1000 /*
1001 * Compute the number of days from date, obey the local switch from
1002 * Julian to Gregorian if specified by the user.
1003 */
1004 static int
sndaysr(struct date * d)1005 sndaysr(struct date *d)
1006 {
1007
1008 if (nswitch != 0)
1009 if (nswitch < ndaysj(d))
1010 return (ndaysg(d));
1011 else
1012 return (ndaysj(d));
1013 else
1014 return ndaysg(d);
1015 }
1016
1017 /*
1018 * Compute the number of days from date, obey the switch from
1019 * Julian to Gregorian as used by UK and her colonies.
1020 */
1021 static int
sndaysb(struct date * d)1022 sndaysb(struct date *d)
1023 {
1024
1025 if (nswitchb < ndaysj(d))
1026 return (ndaysg(d));
1027 else
1028 return (ndaysj(d));
1029 }
1030
1031 /* Inverse of sndays. */
1032 static struct date *
sdater(int nd,struct date * d)1033 sdater(int nd, struct date *d)
1034 {
1035
1036 if (nswitch < nd)
1037 return (gdate(nd, d));
1038 else
1039 return (jdate(nd, d));
1040 }
1041
1042 /* Inverse of sndaysb. */
1043 static struct date *
sdateb(int nd,struct date * d)1044 sdateb(int nd, struct date *d)
1045 {
1046
1047 if (nswitchb < nd)
1048 return (gdate(nd, d));
1049 else
1050 return (jdate(nd, d));
1051 }
1052
1053 /* Center string t in string s of length w by putting enough leading blanks. */
1054 static char *
center(char * s,char * t,int w)1055 center(char *s, char *t, int w)
1056 {
1057 char blanks[MAX_WIDTH];
1058
1059 memset(blanks, ' ', sizeof(blanks));
1060 sprintf(s, "%.*s%s", (int)(w - strlen(t)) / 2, blanks, t);
1061 return (s);
1062 }
1063
1064 /* Center string t in string s of length w by putting enough leading blanks. */
1065 static wchar_t *
wcenter(wchar_t * s,wchar_t * t,int w)1066 wcenter(wchar_t *s, wchar_t *t, int w)
1067 {
1068 char blanks[MAX_WIDTH];
1069
1070 memset(blanks, ' ', sizeof(blanks));
1071 swprintf(s, MAX_WIDTH, L"%.*s%ls", (int)(w - wcslen(t)) / 2, blanks, t);
1072 return (s);
1073 }
1074
1075 static int
parsemonth(const char * s,int * m,int * y)1076 parsemonth(const char *s, int *m, int *y)
1077 {
1078 int nm, ny;
1079 char *cp;
1080 struct tm tm;
1081
1082 nm = (int)strtol(s, &cp, 10);
1083 if (cp != s) {
1084 ny = *y;
1085 if (*cp == '\0') {
1086 ; /* no special action */
1087 } else if (*cp == 'f' || *cp == 'F') {
1088 if (nm <= *m)
1089 ny++;
1090 } else if (*cp == 'p' || *cp == 'P') {
1091 if (nm >= *m)
1092 ny--;
1093 } else
1094 return (1);
1095 if (nm < 1 || nm > 12)
1096 return 1;
1097 *m = nm;
1098 *y = ny;
1099 return (0);
1100 }
1101 if (strptime(s, "%B", &tm) != NULL || strptime(s, "%b", &tm) != NULL) {
1102 *m = tm.tm_mon + 1;
1103 return (0);
1104 }
1105 return (1);
1106 }
1107
1108 static void
highlight(char * dst,char * src,int len,int * extralen)1109 highlight(char *dst, char *src, int len, int *extralen)
1110 {
1111 static int first = 1;
1112 static const char *term_so, *term_se;
1113
1114 if (first) {
1115 static char cbuf[512];
1116 char tbuf[1024], *b;
1117
1118 term_se = term_so = NULL;
1119
1120 /* On how to highlight on this type of terminal (if any). */
1121 if (isatty(STDOUT_FILENO) && tgetent(tbuf, NULL) == 1) {
1122 b = cbuf;
1123 term_so = tgetstr("so", &b);
1124 term_se = tgetstr("se", &b);
1125 }
1126
1127 first = 0;
1128 }
1129
1130 /*
1131 * This check is not necessary, should have been handled before calling
1132 * this function.
1133 */
1134 if (flag_nohighlight) {
1135 memcpy(dst, src, len);
1136 return;
1137 }
1138
1139 /*
1140 * If it is a real terminal, use the data from the termcap database.
1141 */
1142 if (term_so != NULL && term_se != NULL) {
1143 /* separator. */
1144 dst[0] = ' ';
1145 dst++;
1146 /* highlight on. */
1147 memcpy(dst, term_so, strlen(term_so));
1148 dst += strlen(term_so);
1149 /* the actual text. (minus leading space) */
1150 len--;
1151 src++;
1152 memcpy(dst, src, len);
1153 dst += len;
1154 /* highlight off. */
1155 memcpy(dst, term_se, strlen(term_se));
1156 *extralen = strlen(term_so) + strlen(term_se);
1157 return;
1158 }
1159
1160 /*
1161 * Otherwise, print a _, backspace and the letter.
1162 */
1163 *extralen = 0;
1164 /* skip leading space. */
1165 src++;
1166 len--;
1167 /* separator. */
1168 dst[0] = ' ';
1169 dst++;
1170 while (len > 0) {
1171 /* _ and backspace. */
1172 memcpy(dst, "_\010", 2);
1173 dst += 2;
1174 *extralen += 2;
1175 /* the character. */
1176 *dst++ = *src++;
1177 len--;
1178 }
1179 return;
1180 }
1181