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[apple_cmds.git] / misc_cmds / ncal / ncal.c
1 /*-
2 * Copyright (c) 1997 Wolfgang Helbig
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
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
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
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, 18}},
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 {"LI", "Lithuania", {1918, 2, 1}},
96 {"LN", "Latin", {9999, 05, 31}},
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
167 static char *center(char *s, char *t, int w);
168 static wchar_t *wcenter(wchar_t *s, wchar_t *t, int w);
169 static int firstday(int y, int m);
170 static void highlight(char *dst, char *src, int len, int *extraletters);
171 static void mkmonthr(int year, int month, int jd_flag,
172 struct monthlines * monthl);
173 static void mkmonthb(int year, int month, int jd_flag,
174 struct monthlines * monthl);
175 static void mkweekdays(struct weekdays * wds);
176 static void monthranger(int year, int m, int jd_flag,
177 int before, int after);
178 static void monthrangeb(int year, int m, int jd_flag,
179 int before, int after);
180 static int parsemonth(const char *s, int *m, int *y);
181 static void printcc(void);
182 static void printeaster(int year, int julian, int orthodox);
183 static date *sdater(int ndays, struct date * d);
184 static date *sdateb(int ndays, struct date * d);
185 static int sndaysr(struct date * d);
186 static int sndaysb(struct date * d);
187 static void usage(void);
188
189 int
190 main(int argc, char *argv[])
191 {
192 struct djswitch *p, *q; /* to search user defined switch date */
193 date never = {10000, 1, 1}; /* outside valid range of dates */
194 date ukswitch = {1752, 9, 2};/* switch date for Great Britain */
195 date dt;
196 int ch; /* holds the option character */
197 int m = 0; /* month */
198 int y = 0; /* year */
199 int flag_backward = 0; /* user called cal--backward compat. */
200 int flag_wholeyear = 0; /* user wants the whole year */
201 int flag_julian_cal = 0; /* user wants Julian Calendar */
202 int flag_julian_day = 0; /* user wants the Julian day numbers */
203 int flag_orthodox = 0; /* user wants Orthodox easter */
204 int flag_easter = 0; /* user wants easter date */
205 int flag_3months = 0; /* user wants 3 month display (-3) */
206 int flag_after = 0; /* user wants to see months after */
207 int flag_before = 0; /* user wants to see months before */
208 int flag_specifiedmonth = 0;/* user wants to see this month (-m) */
209 int flag_givenmonth = 0; /* user has specified month [n] */
210 int flag_givenyear = 0; /* user has specified year [n] */
211 char *cp; /* character pointer */
212 char *flag_today = NULL; /* debug: use date as being today */
213 char *flag_month = NULL; /* requested month as string */
214 char *flag_highlightdate = NULL; /* debug: date to highlight */
215 int before, after;
216 const char *locale; /* locale to get country code */
217
218 flag_nohighlight = 0;
219 flag_weeks = 0;
220
221 /*
222 * Use locale to determine the country code,
223 * and use the country code to determine the default
224 * switchdate and date format from the switches table.
225 */
226 if (setlocale(LC_ALL, "") == NULL)
227 warn("setlocale");
228 locale = setlocale(LC_TIME, NULL);
229 if (locale == NULL ||
230 strcmp(locale, "C") == 0 ||
231 strcmp(locale, "POSIX") == 0 ||
232 strcmp(locale, "ASCII") == 0 ||
233 strcmp(locale, "US-ASCII") == 0)
234 locale = "_US";
235 q = switches + sizeof(switches) / sizeof(struct djswitch);
236 for (p = switches; p != q; p++)
237 if ((cp = strstr(locale, p->cc)) != NULL && *(cp - 1) == '_')
238 break;
239 if (p == q) {
240 nswitch = ndaysj(&dftswitch->dt);
241 } else {
242 nswitch = ndaysj(&p->dt);
243 dftswitch = p;
244 }
245
246
247 /*
248 * Get the filename portion of argv[0] and set flag_backward if
249 * this program is called "cal".
250 */
251 if (strncmp(basename(argv[0]), "cal", strlen("cal")) == 0)
252 flag_backward = 1;
253
254 /* Set the switch date to United Kingdom if backwards compatible */
255 if (flag_backward)
256 nswitchb = ndaysj(&ukswitch);
257
258 before = after = -1;
259
260 while ((ch = getopt(argc, argv, "3A:B:Cd:eH:hjJm:Nops:wy")) != -1)
261 switch (ch) {
262 case '3':
263 flag_3months = 1;
264 break;
265 case 'A':
266 if (flag_after > 0)
267 errx(EX_USAGE, "Double -A specified");
268 flag_after = strtol(optarg, NULL, 10);
269 if (flag_after <= 0)
270 errx(EX_USAGE,
271 "Argument to -A must be positive");
272 break;
273 case 'B':
274 if (flag_before > 0)
275 errx(EX_USAGE, "Double -A specified");
276 flag_before = strtol(optarg, NULL, 10);
277 if (flag_before <= 0)
278 errx(EX_USAGE,
279 "Argument to -B must be positive");
280 break;
281 case 'J':
282 if (flag_backward)
283 usage();
284 nswitch = ndaysj(&never);
285 flag_julian_cal = 1;
286 break;
287 case 'C':
288 flag_backward = 1;
289 break;
290 case 'N':
291 flag_backward = 0;
292 break;
293 case 'd':
294 flag_today = optarg;
295 break;
296 case 'H':
297 flag_highlightdate = optarg;
298 break;
299 case 'h':
300 flag_nohighlight = 1;
301 break;
302 case 'e':
303 if (flag_backward)
304 usage();
305 flag_easter = 1;
306 break;
307 case 'j':
308 flag_julian_day = 1;
309 break;
310 case 'm':
311 if (flag_specifiedmonth)
312 errx(EX_USAGE, "Double -m specified");
313 flag_month = optarg;
314 flag_specifiedmonth = 1;
315 break;
316 case 'o':
317 if (flag_backward)
318 usage();
319 flag_orthodox = 1;
320 flag_easter = 1;
321 break;
322 case 'p':
323 if (flag_backward)
324 usage();
325 printcc();
326 return (0);
327 break;
328 case 's':
329 if (flag_backward)
330 usage();
331 q = switches +
332 sizeof(switches) / sizeof(struct djswitch);
333 for (p = switches;
334 p != q && strcmp(p->cc, optarg) != 0; p++)
335 ;
336 if (p == q)
337 errx(EX_USAGE,
338 "%s: invalid country code", optarg);
339 nswitch = ndaysj(&(p->dt));
340 break;
341 case 'w':
342 if (flag_backward)
343 usage();
344 flag_weeks = 1;
345 break;
346 case 'y':
347 flag_wholeyear = 1;
348 break;
349 default:
350 usage();
351 }
352
353 argc -= optind;
354 argv += optind;
355
356 switch (argc) {
357 case 2:
358 if (flag_easter)
359 usage();
360 flag_month = *argv++;
361 flag_givenmonth = 1;
362 m = strtol(flag_month, NULL, 10);
363 /* FALLTHROUGH */
364 case 1:
365 y = atoi(*argv);
366 if (y < 1 || y > 9999)
367 errx(EX_USAGE, "year `%s' not in range 1..9999", *argv);
368 argv++;
369 flag_givenyear = 1;
370 break;
371 case 0:
372 if (flag_today != NULL) {
373 y = strtol(flag_today, NULL, 10);
374 m = strtol(flag_today + 5, NULL, 10);
375 } else {
376 time_t t;
377 struct tm *tm;
378
379 t = time(NULL);
380 tm = localtime(&t);
381 y = tm->tm_year + 1900;
382 m = tm->tm_mon + 1;
383 }
384 break;
385 default:
386 usage();
387 }
388
389 if (flag_month != NULL) {
390 if (parsemonth(flag_month, &m, &y)) {
391 errx(EX_USAGE,
392 "%s is neither a month number (1..12) nor a name",
393 flag_month);
394 }
395 }
396
397 /*
398 * What is not supported:
399 * -3 with -A or -B
400 * -3 displays 3 months, -A and -B change that behaviour.
401 * -3 with -y
402 * -3 displays 3 months, -y says display a whole year.
403 * -3 with a given year but no given month or without -m
404 * -3 displays 3 months, no month specified doesn't make clear
405 * which three months.
406 * -m with a given month
407 * conflicting arguments, both specify the same field.
408 * -y with -m
409 * -y displays the whole year, -m displays a single month.
410 * -y with a given month
411 * -y displays the whole year, the given month displays a single
412 * month.
413 * -y with -A or -B
414 * -y displays the whole year, -A and -B display extra months.
415 */
416
417 /* -3 together with -A or -B. */
418 if (flag_3months && (flag_after || flag_before))
419 errx(EX_USAGE, "-3 together with -A and -B is not supported.");
420 /* -3 together with -y. */
421 if (flag_3months && flag_wholeyear)
422 errx(EX_USAGE, "-3 together with -y is not supported.");
423 /* -3 together with givenyear but no givenmonth. */
424 if (flag_3months && flag_givenyear &&
425 !(flag_givenmonth || flag_specifiedmonth))
426 errx(EX_USAGE,
427 "-3 together with a given year but no given month is "
428 "not supported.");
429 /* -m together with xx xxxx. */
430 if (flag_specifiedmonth && flag_givenmonth)
431 errx(EX_USAGE,
432 "-m together with a given month is not supported.");
433 /* -y together with -m. */
434 if (flag_wholeyear && flag_specifiedmonth)
435 errx(EX_USAGE, "-y together with -m is not supported.");
436 /* -y together with xx xxxx. */
437 if (flag_wholeyear && flag_givenmonth)
438 errx(EX_USAGE, "-y together a given month is not supported.");
439 /* -y together with -A or -B. */
440 if (flag_wholeyear && (flag_before > 0 || flag_after > 0))
441 errx(EX_USAGE, "-y together a -A or -B is not supported.");
442 /* The rest should be fine. */
443
444 /* Select the period to display, in order of increasing priority .*/
445 if (flag_wholeyear ||
446 (flag_givenyear && !(flag_givenmonth || flag_specifiedmonth))) {
447 m = 1;
448 before = 0;
449 after = 11;
450 }
451 if (flag_givenyear && flag_givenmonth) {
452 before = 0;
453 after = 0;
454 }
455 if (flag_specifiedmonth) {
456 before = 0;
457 after = 0;
458 }
459 if (flag_before) {
460 before = flag_before;
461 }
462 if (flag_after) {
463 after = flag_after;
464 }
465 if (flag_3months) {
466 before = 1;
467 after = 1;
468 }
469 if (after == -1)
470 after = 0;
471 if (before == -1)
472 before = 0;
473
474 /* Highlight a specified day or today .*/
475 if (flag_highlightdate != NULL) {
476 dt.y = strtol(flag_highlightdate, NULL, 10);
477 dt.m = strtol(flag_highlightdate + 5, NULL, 10);
478 dt.d = strtol(flag_highlightdate + 8, NULL, 10);
479 } else {
480 time_t t;
481 struct tm *tm1;
482
483 t = time(NULL);
484 tm1 = localtime(&t);
485 dt.y = tm1->tm_year + 1900;
486 dt.m = tm1->tm_mon + 1;
487 dt.d = tm1->tm_mday;
488 }
489 highlightdate = sndaysb(&dt);
490
491 /* And now we finally start to calculate and output calendars. */
492 if (flag_easter)
493 printeaster(y, flag_julian_cal, flag_orthodox);
494 else
495 if (flag_backward)
496 monthrangeb(y, m, flag_julian_day, before, after);
497 else
498 monthranger(y, m, flag_julian_day, before, after);
499 return (0);
500 }
501
502 static void
503 usage(void)
504 {
505
506 fputs(
507 "Usage: cal [general options] [-hjy] [[month] year]\n"
508 " cal [general options] [-hj] [-m month] [year]\n"
509 " ncal [general options] [-hJjpwy] [-s country_code] [[month] year]\n"
510 " ncal [general options] [-hJeo] [year]\n"
511 "General options: [-NC3] [-A months] [-B months]\n"
512 "For debug the highlighting: [-H yyyy-mm-dd] [-d yyyy-mm]\n",
513 stderr);
514 exit(EX_USAGE);
515 }
516
517 /* Print the assumed switches for all countries. */
518 static void
519 printcc(void)
520 {
521 struct djswitch *p;
522 int n; /* number of lines to print */
523 int m; /* offset from left to right table entry on the same line */
524
525 #define FSTR "%c%s %-15s%4d-%02d-%02d"
526 #define DFLT(p) ((p) == dftswitch ? '*' : ' ')
527 #define FSTRARG(p) DFLT(p), (p)->cc, (p)->nm, (p)->dt.y, (p)->dt.m, (p)->dt.d
528
529 n = sizeof(switches) / sizeof(struct djswitch);
530 m = (n + 1) / 2;
531 n /= 2;
532 for (p = switches; p != switches + n; p++)
533 printf(FSTR" "FSTR"\n", FSTRARG(p), FSTRARG(p+m));
534 if (m != n)
535 printf(FSTR"\n", FSTRARG(p));
536 }
537
538 /* Print the date of easter sunday. */
539 static void
540 printeaster(int y, int julian, int orthodox)
541 {
542 date dt;
543 struct tm tm;
544 char buf[MAX_WIDTH];
545 static int d_first = -1;
546
547 if (d_first < 0)
548 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
549 /* force orthodox easter for years before 1583 */
550 if (y < 1583)
551 orthodox = 1;
552
553 if (orthodox)
554 if (julian)
555 easteroj(y, &dt);
556 else
557 easterog(y, &dt);
558 else
559 easterg(y, &dt);
560
561 memset(&tm, 0, sizeof(tm));
562 tm.tm_year = dt.y - 1900;
563 tm.tm_mon = dt.m - 1;
564 tm.tm_mday = dt.d;
565 strftime(buf, sizeof(buf), d_first ? "%e %B %Y" : "%B %e %Y", &tm);
566 printf("%s\n", buf);
567 }
568
569 #define MW(mw, me) ((mw) + me)
570 #define DECREASEMONTH(m, y) \
571 if (--m == 0) { \
572 m = 12; \
573 y--; \
574 }
575 #define INCREASEMONTH(m, y) \
576 if (++(m) == 13) { \
577 (m) = 1; \
578 (y)++; \
579 }
580 #define M2Y(m) ((m) / 12)
581 #define M2M(m) (1 + (m) % 12)
582
583 /* Print all months for the period in the range [ before .. y-m .. after ]. */
584 static void
585 monthrangeb(int y, int m, int jd_flag, int before, int after)
586 {
587 struct monthlines year[12];
588 struct weekdays wds;
589 char s[MAX_WIDTH], t[MAX_WIDTH];
590 wchar_t ws[MAX_WIDTH], ws1[MAX_WIDTH];
591 const char *wdss;
592 int i, j;
593 int mpl;
594 int mw;
595 int m1, m2;
596 int printyearheader;
597 int prevyear = -1;
598
599 mpl = jd_flag ? 2 : 3;
600 mw = jd_flag ? MONTH_WIDTH_B_J : MONTH_WIDTH_B;
601 wdss = (mpl == 2) ? " " : "";
602
603 while (before != 0) {
604 DECREASEMONTH(m, y);
605 before--;
606 after++;
607 }
608 m1 = y * 12 + m - 1;
609 m2 = m1 + after;
610
611 mkweekdays(&wds);
612
613 /*
614 * The year header is printed when there are more than 'mpl' months
615 * and if the first month is a multitude of 'mpl'.
616 * If not, it will print the year behind every month.
617 */
618 printyearheader = (after >= mpl - 1) && (M2M(m1) - 1) % mpl == 0;
619
620 m = m1;
621 while (m <= m2) {
622 int count = 0;
623 for (i = 0; i != mpl && m + i <= m2; i++) {
624 mkmonthb(M2Y(m + i), M2M(m + i) - 1, jd_flag, year + i);
625 count++;
626 }
627
628 /* Empty line between two rows of months */
629 if (m != m1)
630 printf("\n");
631
632 /* Year at the top. */
633 if (printyearheader && M2Y(m) != prevyear) {
634 sprintf(s, "%d", M2Y(m));
635 printf("%s\n", center(t, s, mpl * mw));
636 prevyear = M2Y(m);
637 }
638
639 /* Month names. */
640 for (i = 0; i < count; i++)
641 if (printyearheader)
642 wprintf(L"%-*ls ",
643 mw, wcenter(ws, year[i].name, mw));
644 else {
645 swprintf(ws, sizeof(ws)/sizeof(ws[0]),
646 L"%-ls %d", year[i].name, M2Y(m + i));
647 wprintf(L"%-*ls ", mw, wcenter(ws1, ws, mw));
648 }
649 printf("\n");
650
651 /* Day of the week names. */
652 for (i = 0; i < count; i++) {
653 wprintf(L"%s%ls%s%ls%s%ls%s%ls%s%ls%s%ls%s%ls ",
654 wdss, wds.names[6], wdss, wds.names[0],
655 wdss, wds.names[1], wdss, wds.names[2],
656 wdss, wds.names[3], wdss, wds.names[4],
657 wdss, wds.names[5]);
658 }
659 printf("\n");
660
661 /* And the days of the month. */
662 for (i = 0; i != 6; i++) {
663 for (j = 0; j < count; j++)
664 printf("%-*s ",
665 MW(mw, year[j].extralen[i]),
666 year[j].lines[i]+1);
667 printf("\n");
668 }
669
670 m += mpl;
671 }
672 }
673
674 static void
675 monthranger(int y, int m, int jd_flag, int before, int after)
676 {
677 struct monthlines year[12];
678 struct weekdays wds;
679 char s[MAX_WIDTH], t[MAX_WIDTH];
680 int i, j;
681 int mpl;
682 int mw;
683 int m1, m2;
684 int prevyear = -1;
685 int printyearheader;
686
687 mpl = jd_flag ? 3 : 4;
688 mw = jd_flag ? MONTH_WIDTH_R_J : MONTH_WIDTH_R;
689
690 while (before != 0) {
691 DECREASEMONTH(m, y);
692 before--;
693 after++;
694 }
695 m1 = y * 12 + m - 1;
696 m2 = m1 + after;
697
698 mkweekdays(&wds);
699
700 /*
701 * The year header is printed when there are more than 'mpl' months
702 * and if the first month is a multitude of 'mpl'.
703 * If not, it will print the year behind every month.
704 */
705 printyearheader = (after >= mpl - 1) && (M2M(m1) - 1) % mpl == 0;
706
707 m = m1;
708 while (m <= m2) {
709 int count = 0;
710 for (i = 0; i != mpl && m + i <= m2; i++) {
711 mkmonthr(M2Y(m + i), M2M(m + i) - 1, jd_flag, year + i);
712 count++;
713 }
714
715 /* Empty line between two rows of months. */
716 if (m != m1)
717 printf("\n");
718
719 /* Year at the top. */
720 if (printyearheader && M2Y(m) != prevyear) {
721 sprintf(s, "%d", M2Y(m));
722 printf("%s\n", center(t, s, mpl * mw));
723 prevyear = M2Y(m);
724 }
725
726 /* Month names. */
727 wprintf(L" ");
728 for (i = 0; i < count; i++)
729 if (printyearheader)
730 wprintf(L"%-*ls", mw, year[i].name);
731 else
732 wprintf(L"%-ls %-*d", year[i].name,
733 mw - wcslen(year[i].name) - 1, M2Y(m + i));
734 printf("\n");
735
736 /* And the days of the month. */
737 for (i = 0; i != 7; i++) {
738 /* Week day */
739 wprintf(L"%.2ls", wds.names[i]);
740
741 /* Full months */
742 for (j = 0; j < count; j++)
743 printf("%-*s",
744 MW(mw, year[j].extralen[i]),
745 year[j].lines[i]);
746 printf("\n");
747 }
748
749 /* Week numbers. */
750 if (flag_weeks) {
751 printf(" ");
752 for (i = 0; i < count; i++)
753 printf("%-*s", mw, year[i].weeks);
754 printf("\n");
755 }
756
757 m += mpl;
758 }
759 return;
760 }
761
762 static void
763 mkmonthr(int y, int m, int jd_flag, struct monthlines *mlines)
764 {
765
766 struct tm tm; /* for strftime printing local names of
767 * months */
768 date dt; /* handy date */
769 int dw; /* width of numbers */
770 int first; /* first day of month */
771 int firstm; /* first day of first week of month */
772 int i, j, k, l; /* just indices */
773 int last; /* the first day of next month */
774 int jan1 = 0; /* the first day of this year */
775 char *ds; /* pointer to day strings (daystr or
776 * jdaystr) */
777
778 /* Set name of month. */
779 memset(&tm, 0, sizeof(tm));
780 tm.tm_mon = m;
781 wcsftime(mlines->name, sizeof(mlines->name) / sizeof(mlines->name[0]),
782 L"%OB", &tm);
783 mlines->name[0] = towupper(mlines->name[0]);
784
785 /*
786 * Set first and last to the day number of the first day of this
787 * month and the first day of next month respectively. Set jan1 to
788 * the day number of the first day of this year.
789 */
790 first = firstday(y, m + 1);
791 if (m == 11)
792 last = firstday(y + 1, 1);
793 else
794 last = firstday(y, m + 2);
795
796 if (jd_flag)
797 jan1 = firstday(y, 1);
798
799 /*
800 * Set firstm to the day number of monday of the first week of
801 * this month. (This might be in the last month)
802 */
803 firstm = first - weekday(first);
804
805 /* Set ds (daystring) and dw (daywidth) according to the jd_flag. */
806 if (jd_flag) {
807 ds = jdaystr;
808 dw = 4;
809 } else {
810 ds = daystr;
811 dw = 3;
812 }
813
814 /*
815 * Fill the lines with day of month or day of year (julian day)
816 * line index: i, each line is one weekday. column index: j, each
817 * column is one day number. print column index: k.
818 */
819 for (i = 0; i != 7; i++) {
820 l = 0;
821 for (j = firstm + i, k = 0; j < last; j += 7, k += dw) {
822 if (j >= first) {
823 if (jd_flag)
824 dt.d = j - jan1 + 1;
825 else
826 sdater(j, &dt);
827 if (j == highlightdate && !flag_nohighlight
828 && isatty(STDOUT_FILENO))
829 highlight(mlines->lines[i] + k,
830 ds + dt.d * dw, dw, &l);
831 else
832 memcpy(mlines->lines[i] + k + l,
833 ds + dt.d * dw, dw);
834 } else
835 memcpy(mlines->lines[i] + k + l, " ", dw);
836 }
837 mlines->lines[i][k + l] = '\0';
838 mlines->extralen[i] = l;
839 }
840
841 /* fill the weeknumbers. */
842 if (flag_weeks) {
843 for (j = firstm, k = 0; j < last; k += dw, j += 7)
844 if (j <= nswitch)
845 memset(mlines->weeks + k, ' ', dw);
846 else
847 memcpy(mlines->weeks + k,
848 ds + week(j, &i)*dw, dw);
849 mlines->weeks[k] = '\0';
850 }
851 }
852
853 static void
854 mkmonthb(int y, int m, int jd_flag, struct monthlines *mlines)
855 {
856
857 struct tm tm; /* for strftime printing local names of
858 * months */
859 date dt; /* handy date */
860 int dw; /* width of numbers */
861 int first; /* first day of month */
862 int firsts; /* sunday of first week of month */
863 int i, j, k, l; /* just indices */
864 int jan1 = 0; /* the first day of this year */
865 int last; /* the first day of next month */
866 char *ds; /* pointer to day strings (daystr or
867 * jdaystr) */
868
869 /* Set ds (daystring) and dw (daywidth) according to the jd_flag */
870 if (jd_flag) {
871 ds = jdaystr;
872 dw = 4;
873 } else {
874 ds = daystr;
875 dw = 3;
876 }
877
878 /* Set name of month centered. */
879 memset(&tm, 0, sizeof(tm));
880 tm.tm_mon = m;
881 wcsftime(mlines->name, sizeof(mlines->name) / sizeof(mlines->name[0]),
882 L"%OB", &tm);
883 mlines->name[0] = towupper(mlines->name[0]);
884
885 /*
886 * Set first and last to the day number of the first day of this
887 * month and the first day of next month respectively. Set jan1 to
888 * the day number of Jan 1st of this year.
889 */
890 dt.y = y;
891 dt.m = m + 1;
892 dt.d = 1;
893 first = sndaysb(&dt);
894 if (m == 11) {
895 dt.y = y + 1;
896 dt.m = 1;
897 dt.d = 1;
898 } else {
899 dt.y = y;
900 dt.m = m + 2;
901 dt.d = 1;
902 }
903 last = sndaysb(&dt);
904
905 if (jd_flag) {
906 dt.y = y;
907 dt.m = 1;
908 dt.d = 1;
909 jan1 = sndaysb(&dt);
910 }
911
912 /*
913 * Set firsts to the day number of sunday of the first week of
914 * this month. (This might be in the last month)
915 */
916 firsts = first - (weekday(first)+1) % 7;
917
918 /*
919 * Fill the lines with day of month or day of year (Julian day)
920 * line index: i, each line is one week. column index: j, each
921 * column is one day number. print column index: k.
922 */
923 for (i = 0; i != 6; i++) {
924 l = 0;
925 for (j = firsts + 7 * i, k = 0; j < last && k != dw * 7;
926 j++, k += dw) {
927 if (j >= first) {
928 if (jd_flag)
929 dt.d = j - jan1 + 1;
930 else
931 sdateb(j, &dt);
932 if (j == highlightdate && !flag_nohighlight)
933 highlight(mlines->lines[i] + k,
934 ds + dt.d * dw, dw, &l);
935 else
936 memcpy(mlines->lines[i] + k + l,
937 ds + dt.d * dw, dw);
938 } else
939 memcpy(mlines->lines[i] + k + l, " ", dw);
940 }
941 if (k == 0)
942 mlines->lines[i][1] = '\0';
943 else
944 mlines->lines[i][k + l] = '\0';
945 mlines->extralen[i] = l;
946 }
947 }
948
949 /* Put the local names of weekdays into the wds. */
950 static void
951 mkweekdays(struct weekdays *wds)
952 {
953 int i, len, width = 0;
954 struct tm tm;
955 wchar_t buf[20];
956
957 memset(&tm, 0, sizeof(tm));
958
959 for (i = 0; i != 7; i++) {
960 tm.tm_wday = (i+1) % 7;
961 wcsftime(buf, sizeof(buf)/sizeof(buf[0]), L"%a", &tm);
962 for (len = 2; len > 0; --len) {
963 if ((width = wcswidth(buf, len)) <= 2)
964 break;
965 }
966 wmemset(wds->names[i], L'\0', 4);
967 if (width == 1)
968 wds->names[i][0] = L' ';
969 wcsncat(wds->names[i], buf, len);
970 wcsncat(wds->names[i], L" ", 1);
971 }
972 }
973
974 /*
975 * Compute the day number of the first existing date after the first day in
976 * month. (the first day in month and even the month might not exist!)
977 */
978 static int
979 firstday(int y, int m)
980 {
981 date dt;
982 int nd;
983
984 dt.y = y;
985 dt.m = m;
986 dt.d = 1;
987 nd = sndaysr(&dt);
988 for (;;) {
989 sdater(nd, &dt);
990 if ((dt.m >= m && dt.y == y) || dt.y > y)
991 return (nd);
992 else
993 nd++;
994 }
995 /* NEVER REACHED */
996 }
997
998 /*
999 * Compute the number of days from date, obey the local switch from
1000 * Julian to Gregorian if specified by the user.
1001 */
1002 static int
1003 sndaysr(struct date *d)
1004 {
1005
1006 if (nswitch != 0)
1007 if (nswitch < ndaysj(d))
1008 return (ndaysg(d));
1009 else
1010 return (ndaysj(d));
1011 else
1012 return ndaysg(d);
1013 }
1014
1015 /*
1016 * Compute the number of days from date, obey the switch from
1017 * Julian to Gregorian as used by UK and her colonies.
1018 */
1019 static int
1020 sndaysb(struct date *d)
1021 {
1022
1023 if (nswitchb < ndaysj(d))
1024 return (ndaysg(d));
1025 else
1026 return (ndaysj(d));
1027 }
1028
1029 /* Inverse of sndays. */
1030 static struct date *
1031 sdater(int nd, struct date *d)
1032 {
1033
1034 if (nswitch < nd)
1035 return (gdate(nd, d));
1036 else
1037 return (jdate(nd, d));
1038 }
1039
1040 /* Inverse of sndaysb. */
1041 static struct date *
1042 sdateb(int nd, struct date *d)
1043 {
1044
1045 if (nswitchb < nd)
1046 return (gdate(nd, d));
1047 else
1048 return (jdate(nd, d));
1049 }
1050
1051 /* Center string t in string s of length w by putting enough leading blanks. */
1052 static char *
1053 center(char *s, char *t, int w)
1054 {
1055 char blanks[MAX_WIDTH];
1056
1057 memset(blanks, ' ', sizeof(blanks));
1058 sprintf(s, "%.*s%s", (int)(w - strlen(t)) / 2, blanks, t);
1059 return (s);
1060 }
1061
1062 /* Center string t in string s of length w by putting enough leading blanks. */
1063 static wchar_t *
1064 wcenter(wchar_t *s, wchar_t *t, int w)
1065 {
1066 char blanks[MAX_WIDTH];
1067
1068 memset(blanks, ' ', sizeof(blanks));
1069 swprintf(s, MAX_WIDTH, L"%.*s%ls", (int)(w - wcslen(t)) / 2, blanks, t);
1070 return (s);
1071 }
1072
1073 static int
1074 parsemonth(const char *s, int *m, int *y)
1075 {
1076 int nm, ny;
1077 char *cp;
1078 struct tm tm;
1079
1080 nm = (int)strtol(s, &cp, 10);
1081 if (cp != s) {
1082 ny = *y;
1083 if (*cp == '\0') {
1084 ; /* no special action */
1085 } else if (*cp == 'f' || *cp == 'F') {
1086 if (nm <= *m)
1087 ny++;
1088 } else if (*cp == 'p' || *cp == 'P') {
1089 if (nm >= *m)
1090 ny--;
1091 } else
1092 return (1);
1093 if (nm < 1 || nm > 12)
1094 return 1;
1095 *m = nm;
1096 *y = ny;
1097 return (0);
1098 }
1099 if (strptime(s, "%B", &tm) != NULL || strptime(s, "%b", &tm) != NULL) {
1100 *m = tm.tm_mon + 1;
1101 return (0);
1102 }
1103 return (1);
1104 }
1105
1106 static void
1107 highlight(char *dst, char *src, int len, int *extralen)
1108 {
1109 static int first = 1;
1110 static const char *term_so, *term_se;
1111
1112 if (first) {
1113 char tbuf[1024], cbuf[512], *b;
1114
1115 term_se = term_so = NULL;
1116
1117 /* On how to highlight on this type of terminal (if any). */
1118 if (isatty(STDOUT_FILENO) && tgetent(tbuf, NULL) == 1) {
1119 b = cbuf;
1120 term_so = tgetstr("so", &b);
1121 term_se = tgetstr("se", &b);
1122 }
1123
1124 first = 0;
1125 }
1126
1127 /*
1128 * This check is not necessary, should have been handled before calling
1129 * this function.
1130 */
1131 if (flag_nohighlight) {
1132 memcpy(dst, src, len);
1133 return;
1134 }
1135
1136 /*
1137 * If it is a real terminal, use the data from the termcap database.
1138 */
1139 if (term_so != NULL && term_se != NULL) {
1140 /* separator. */
1141 dst[0] = ' ';
1142 dst++;
1143 /* highlight on. */
1144 memcpy(dst, term_so, strlen(term_so));
1145 dst += strlen(term_so);
1146 /* the actual text. (minus leading space) */
1147 len--;
1148 src++;
1149 memcpy(dst, src, len);
1150 dst += len;
1151 /* highlight off. */
1152 memcpy(dst, term_se, strlen(term_se));
1153 *extralen = strlen(term_so) + strlen(term_se);
1154 return;
1155 }
1156
1157 /*
1158 * Otherwise, print a _, backspace and the letter.
1159 */
1160 *extralen = 0;
1161 /* skip leading space. */
1162 src++;
1163 len--;
1164 /* separator. */
1165 dst[0] = ' ';
1166 dst++;
1167 while (len > 0) {
1168 /* _ and backspace. */
1169 memcpy(dst, "_\010", 2);
1170 dst += 2;
1171 *extralen += 2;
1172 /* the character. */
1173 *dst++ = *src++;
1174 len--;
1175 }
1176 return;
1177 }
WIP BSD Userland for iOS