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Tweak cdefs.h (no functional change)
[dragonfly.git] / usr.bin / ncal / ncal.c
blobbe43a5058b126fa624e3ced2715e16aa6778982e
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 * $FreeBSD: src/usr.bin/ncal/ncal.c,v 1.11.2.3 2002/10/23 08:10:00 roam Exp $
27 * $DragonFly: src/usr.bin/ncal/ncal.c,v 1.2 2003/06/17 04:29:29 dillon Exp $
28 */
29
30 #include <calendar.h>
31 #include <ctype.h>
32 #include <err.h>
33 #include <langinfo.h>
34 #include <locale.h>
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #include <sysexits.h>
39 #include <time.h>
40 #include <unistd.h>
41 #include <term.h>
42 #undef lines /* term.h defines this */
43
44 /* Width of one month with backward compatibility */
45 #define MONTH_WIDTH_B_J 27
46 #define MONTH_WIDTH_B 20
47
48 #define MONTH_WIDTH_J 24
49 #define MONTH_WIDTH 18
50
51 #define MAX_WIDTH 64
52
53 typedef struct date date;
54
55 struct monthlines {
56 char name[MAX_WIDTH + 1];
57 char lines[7][MAX_WIDTH + 1];
58 char weeks[MAX_WIDTH + 1];
59 };
60
61 struct weekdays {
62 char names[7][4];
63 };
64
65 /* The switches from Julian to Gregorian in some countries */
66 static struct djswitch {
67 char *cc; /* Country code according to ISO 3166 */
68 char *nm; /* Name of country */
69 date dt; /* Last day of Julian calendar */
70 } switches[] = {
71 {"AL", "Albania", {1912, 11, 30}},
72 {"AT", "Austria", {1583, 10, 5}},
73 {"AU", "Australia", {1752, 9, 2}},
74 {"BE", "Belgium", {1582, 12, 14}},
75 {"BG", "Bulgaria", {1916, 3, 18}},
76 {"CA", "Canada", {1752, 9, 2}},
77 {"CH", "Switzerland", {1655, 2, 28}},
78 {"CN", "China", {1911, 12, 18}},
79 {"CZ", "Czech Republic",{1584, 1, 6}},
80 {"DE", "Germany", {1700, 2, 18}},
81 {"DK", "Denmark", {1700, 2, 18}},
82 {"ES", "Spain", {1582, 10, 4}},
83 {"FI", "Finland", {1753, 2, 17}},
84 {"FR", "France", {1582, 12, 9}},
85 {"GB", "United Kingdom",{1752, 9, 2}},
86 {"GR", "Greece", {1924, 3, 9}},
87 {"HU", "Hungary", {1587, 10, 21}},
88 {"IS", "Iceland", {1700, 11, 16}},
89 {"IT", "Italy", {1582, 10, 4}},
90 {"JP", "Japan", {1918, 12, 18}},
91 {"LI", "Lithuania", {1918, 2, 1}},
92 {"LN", "Latin", {9999, 05, 31}},
93 {"LU", "Luxembourg", {1582, 12, 14}},
94 {"LV", "Latvia", {1918, 2, 1}},
95 {"NL", "Netherlands", {1582, 12, 14}},
96 {"NO", "Norway", {1700, 2, 18}},
97 {"PL", "Poland", {1582, 10, 4}},
98 {"PT", "Portugal", {1582, 10, 4}},
99 {"RO", "Romania", {1919, 3, 31}},
100 {"RU", "Russia", {1918, 1, 31}},
101 {"SI", "Slovenia", {1919, 3, 4}},
102 {"SW", "Sweden", {1753, 2, 17}},
103 {"TR", "Turkey", {1926, 12, 18}},
104 {"US", "United States", {1752, 9, 2}},
105 {"YU", "Yugoslavia", {1919, 3, 4}}
106 };
107
108 struct djswitch *dftswitch =
109 switches + sizeof(switches) / sizeof(struct djswitch) - 2;
110 /* default switch (should be "US") */
111
112 /* Table used to print day of month and week numbers */
113 char daystr[] = " 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15"
114 " 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31"
115 " 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47"
116 " 48 49 50 51 52 53";
117
118 /* Table used to print day of year and week numbers */
119 char jdaystr[] = " 1 2 3 4 5 6 7 8 9"
120 " 10 11 12 13 14 15 16 17 18 19"
121 " 20 21 22 23 24 25 26 27 28 29"
122 " 30 31 32 33 34 35 36 37 38 39"
123 " 40 41 42 43 44 45 46 47 48 49"
124 " 50 51 52 53 54 55 56 57 58 59"
125 " 60 61 62 63 64 65 66 67 68 69"
126 " 70 71 72 73 74 75 76 77 78 79"
127 " 80 81 82 83 84 85 86 87 88 89"
128 " 90 91 92 93 94 95 96 97 98 99"
129 " 100 101 102 103 104 105 106 107 108 109"
130 " 110 111 112 113 114 115 116 117 118 119"
131 " 120 121 122 123 124 125 126 127 128 129"
132 " 130 131 132 133 134 135 136 137 138 139"
133 " 140 141 142 143 144 145 146 147 148 149"
134 " 150 151 152 153 154 155 156 157 158 159"
135 " 160 161 162 163 164 165 166 167 168 169"
136 " 170 171 172 173 174 175 176 177 178 179"
137 " 180 181 182 183 184 185 186 187 188 189"
138 " 190 191 192 193 194 195 196 197 198 199"
139 " 200 201 202 203 204 205 206 207 208 209"
140 " 210 211 212 213 214 215 216 217 218 219"
141 " 220 221 222 223 224 225 226 227 228 229"
142 " 230 231 232 233 234 235 236 237 238 239"
143 " 240 241 242 243 244 245 246 247 248 249"
144 " 250 251 252 253 254 255 256 257 258 259"
145 " 260 261 262 263 264 265 266 267 268 269"
146 " 270 271 272 273 274 275 276 277 278 279"
147 " 280 281 282 283 284 285 286 287 288 289"
148 " 290 291 292 293 294 295 296 297 298 299"
149 " 300 301 302 303 304 305 306 307 308 309"
150 " 310 311 312 313 314 315 316 317 318 319"
151 " 320 321 322 323 324 325 326 327 328 329"
152 " 330 331 332 333 334 335 336 337 338 339"
153 " 340 341 342 343 344 345 346 347 348 349"
154 " 350 351 352 353 354 355 356 357 358 359"
155 " 360 361 362 363 364 365 366";
156
157 int flag_weeks; /* user wants number of week */
158 int nswitch; /* user defined switch date */
159 int nswitchb; /* switch date for backward compatibility */
160 const char *term_so, *term_se;
161 int today;
162
163 char *center(char *s, char *t, int w);
164 void mkmonth(int year, int month, int jd_flag, struct monthlines * monthl);
165 void mkmonthb(int year, int month, int jd_flag, struct monthlines * monthl);
166 void mkweekdays(struct weekdays * wds);
167 int parsemonth(const char *s);
168 void printcc(void);
169 void printeaster(int year, int julian, int orthodox);
170 void printmonth(int year, int month, int jd_flag);
171 void printmonthb(int year, int month, int jd_flag);
172 void printyear(int year, int jd_flag);
173 void printyearb(int year, int jd_flag);
174 int firstday(int y, int m);
175 date *sdate(int ndays, struct date * d);
176 date *sdateb(int ndays, struct date * d);
177 int sndays(struct date * d);
178 int sndaysb(struct date * d);
179 static void usage(void);
180 int weekdayb(int nd);
181
182 int
183 main(int argc, char *argv[])
184 {
185 struct djswitch *p, *q; /* to search user defined switch date */
186 date never = {10000, 1, 1}; /* outside valid range of dates */
187 date ukswitch = {1752, 9, 2};/* switch date for Great Britain */
188 date dt; /* today as date */
189 int ch; /* holds the option character */
190 int m = 0; /* month */
191 int y = 0; /* year */
192 int flag_backward = 0; /* user called cal--backward compat. */
193 int flag_hole_year = 0; /* user wants the whole year */
194 int flag_julian_cal = 0; /* user wants Julian Calendar */
195 int flag_julian_day = 0; /* user wants the Julian day
196 * numbers */
197 int flag_orthodox = 0; /* use wants Orthodox easter */
198 int flag_easter = 0; /* use wants easter date */
199 char *cp; /* character pointer */
200 char *flag_month = NULL; /* requested month as string */
201 char *locale; /* locale to get country code */
202 char tbuf[1024], cbuf[512], *b;
203 time_t t;
204 struct tm *tm1;
205
206 term_se = term_so = NULL;
207 today = 0;
208 t = time(NULL);
209 tm1 = localtime(&t);
210 y = dt.y = tm1->tm_year + 1900;
211 m = dt.m = tm1->tm_mon + 1;
212 dt.d = tm1->tm_mday;
213 if (isatty(STDOUT_FILENO) && tgetent(tbuf, NULL) == 1) {
214 b = cbuf;
215 term_so = tgetstr("so", &b);
216 term_se = tgetstr("se", &b);
217 today = sndaysb(&dt);
218 }
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 ((locale = 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 for (cp = argv[0]; *cp; cp++)
251 ;
252 while (cp >= argv[0] && *cp != '/')
253 cp--;
254 if (strcmp("cal", ++cp) == 0)
255 flag_backward = 1;
256
257 /* Set the switch date to United Kingdom if backwards compatible */
258 if (flag_backward)
259 nswitchb = ndaysj(&ukswitch);
260
261 while ((ch = getopt(argc, argv, "Jejm:ops:wy")) != -1)
262 switch (ch) {
263 case 'J':
264 if (flag_backward)
265 usage();
266 nswitch = ndaysj(&never);
267 flag_julian_cal = 1;
268 break;
269 case 'e':
270 if (flag_backward)
271 usage();
272 flag_easter = 1;
273 break;
274 case 'j':
275 flag_julian_day = 1;
276 break;
277 case 'm':
278 flag_month = optarg;
279 break;
280 case 'o':
281 if (flag_backward)
282 usage();
283 flag_orthodox = 1;
284 flag_easter = 1;
285 break;
286 case 'p':
287 if (flag_backward)
288 usage();
289 printcc();
290 return (0);
291 break;
292 case 's':
293 if (flag_backward)
294 usage();
295 q = switches +
296 sizeof(switches) / sizeof(struct djswitch);
297 for (p = switches;
298 p != q && strcmp(p->cc, optarg) != 0; p++)
299 ;
300 if (p == q)
301 errx(EX_USAGE,
302 "%s: invalid country code", optarg);
303 nswitch = ndaysj(&(p->dt));
304 break;
305 case 'w':
306 if (flag_backward)
307 usage();
308 flag_weeks = 1;
309 break;
310 case 'y':
311 flag_hole_year = 1;
312 break;
313 default:
314 usage();
315 }
316
317 argc -= optind;
318 argv += optind;
319
320 switch (argc) {
321 case 2:
322 if (flag_easter)
323 usage();
324 flag_month = *argv++;
325 /* FALLTHROUGH */
326 case 1:
327 if (strcmp(*argv, ".") == 0)
328 /* year was already set above */
329 argv++;
330 else
331 y = atoi(*argv++);
332 if (y < 1 || y > 9999)
333 errx(EX_USAGE, "year %d not in range 1..9999", y);
334 break;
335 case 0:
336 break;
337 default:
338 usage();
339 }
340
341 if (flag_month != NULL) {
342 m = parsemonth(flag_month);
343 if (m < 1 || m > 12)
344 errx(EX_USAGE,
345 "%s is neither a month number (1..12) nor a name",
346 flag_month);
347 }
348
349 if (flag_easter)
350 printeaster(y, flag_julian_cal, flag_orthodox);
351 else if (argc == 1 || flag_hole_year) {
352 if (flag_backward)
353 printyearb(y, flag_julian_day);
354 else
355 printyear(y, flag_julian_day);
356 } else
357 if (flag_backward)
358 printmonthb(y, m, flag_julian_day);
359 else
360 printmonth(y, m, flag_julian_day);
361
362 return (0);
363 }
364
365 static void
366 usage(void)
367 {
368
369 fprintf(stderr, "%s\n%s\n%s\n",
370 "usage: cal [-jy] [[month] year]",
371 " ncal [-Jjpwy] [-s country_code] [[month] year]",
372 " ncal [-Jeo] [year]");
373 exit(EX_USAGE);
374 }
375
376 /* print the assumed switches for all countries */
377 void
378 printcc(void)
379 {
380 struct djswitch *p;
381 int n; /* number of lines to print */
382 int m; /* offset from left to right table entry on the same line */
383
384 #define FSTR "%c%s %-15s%4d-%02d-%02d"
385 #define DFLT(p) ((p) == dftswitch ? '*' : ' ')
386 #define FSTRARG(p) DFLT(p), (p)->cc, (p)->nm, (p)->dt.y, (p)->dt.m, (p)->dt.d
387
388 n = sizeof(switches) / sizeof(struct djswitch);
389 m = (n + 1) / 2;
390 n /= 2;
391 for (p = switches; p != switches + n; p++)
392 printf(FSTR" "FSTR"\n", FSTRARG(p), FSTRARG(p+m));
393 if (m != n)
394 printf(FSTR"\n", FSTRARG(p));
395 }
396
397 /* print the date of easter sunday */
398 void
399 printeaster(int y, int julian, int orthodox)
400 {
401 date dt;
402 struct tm tm;
403 char buf[80];
404 static int d_first = -1;
405
406 if (d_first < 0)
407 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
408 /* force orthodox easter for years before 1583 */
409 if (y < 1583)
410 orthodox = 1;
411
412 if (orthodox)
413 if (julian)
414 easteroj(y, &dt);
415 else
416 easterog(y, &dt);
417 else
418 easterg(y, &dt);
419
420 memset(&tm, 0, sizeof(tm));
421 tm.tm_year = dt.y - 1900;
422 tm.tm_mon = dt.m - 1;
423 tm.tm_mday = dt.d;
424 strftime(buf, sizeof(buf), d_first ? "%e %B %Y" : "%B %e %Y", &tm);
425 printf("%s\n", buf);
426 }
427
428 void
429 printmonth(int y, int m, int jd_flag)
430 {
431 struct monthlines month;
432 struct weekdays wds;
433 int i;
434
435 mkmonth(y, m - 1, jd_flag, &month);
436 mkweekdays(&wds);
437 printf(" %s %d\n", month.name, y);
438 for (i = 0; i != 7; i++)
439 printf("%.2s%s\n", wds.names[i], month.lines[i]);
440 if (flag_weeks)
441 printf(" %s\n", month.weeks);
442 }
443
444 void
445 printmonthb(int y, int m, int jd_flag)
446 {
447 struct monthlines month;
448 struct weekdays wds;
449 char s[MAX_WIDTH], t[MAX_WIDTH];
450 int i;
451 int mw;
452
453 mkmonthb(y, m - 1, jd_flag, &month);
454 mkweekdays(&wds);
455
456 mw = jd_flag ? MONTH_WIDTH_B_J : MONTH_WIDTH_B;
457
458 sprintf(s, "%s %d", month.name, y);
459 printf("%s\n", center(t, s, mw));
460
461 if (jd_flag)
462 printf(" %s %s %s %s %s %s %.2s\n", wds.names[6], wds.names[0],
463 wds.names[1], wds.names[2], wds.names[3],
464 wds.names[4], wds.names[5]);
465 else
466 printf("%s%s%s%s%s%s%.2s\n", wds.names[6], wds.names[0],
467 wds.names[1], wds.names[2], wds.names[3],
468 wds.names[4], wds.names[5]);
469
470 for (i = 0; i != 6; i++)
471 printf("%s\n", month.lines[i]+1);
472 }
473
474 void
475 printyear(int y, int jd_flag)
476 {
477 struct monthlines year[12];
478 struct weekdays wds;
479 char s[80], t[80];
480 int i, j;
481 int mpl;
482 int mw;
483
484 for (i = 0; i != 12; i++)
485 mkmonth(y, i, jd_flag, year + i);
486 mkweekdays(&wds);
487 mpl = jd_flag ? 3 : 4;
488 mw = jd_flag ? MONTH_WIDTH_J : MONTH_WIDTH;
489
490 sprintf(s, "%d", y);
491 printf("%s\n", center(t, s, mpl * mw));
492
493 for (j = 0; j != 12; j += mpl) {
494 printf(" %-*s%-*s",
495 mw, year[j].name,
496 mw, year[j + 1].name);
497 if (mpl == 3)
498 printf("%s\n", year[j + 2].name);
499 else
500 printf("%-*s%s\n",
501 mw, year[j + 2].name,
502 year[j + 3].name);
503 for (i = 0; i != 7; i++) {
504 printf("%.2s%s%s",
505 wds.names[i],
506 year[j].lines[i],
507 year[j + 1].lines[i]);
508 if (mpl == 3)
509 printf("%s\n", year[j + 2].lines[i]);
510 else
511 printf("%s%s\n",
512 year[j + 2].lines[i],
513 year[j + 3].lines[i]);
514 }
515 if (flag_weeks) {
516 if (mpl == 3)
517 printf(" %s%s%-s\n",
518 year[j].weeks,
519 year[j + 1].weeks,
520 year[j + 2].weeks);
521 else
522 printf(" %s%s%s%-s\n",
523 year[j].weeks,
524 year[j + 1].weeks,
525 year[j + 2].weeks,
526 year[j + 3].weeks);
527 }
528 }
529 }
530
531 void
532 printyearb(int y, int jd_flag)
533 {
534 struct monthlines year[12];
535 struct weekdays wds;
536 char s[80], t[80];
537 int i, j;
538 int mpl;
539 int mw;
540
541 for (i = 0; i != 12; i++)
542 mkmonthb(y, i, jd_flag, year + i);
543 mkweekdays(&wds);
544 mpl = jd_flag ? 2 : 3;
545 mw = jd_flag ? MONTH_WIDTH_B_J : MONTH_WIDTH_B;
546
547 sprintf(s, "%d", y);
548 printf("%s\n\n", center(t, s, mw * mpl + mpl));
549
550 for (j = 0; j != 12; j += mpl) {
551 printf("%-*s ", mw, center(s, year[j].name, mw));
552 if (mpl == 2)
553 printf("%s\n", center(s, year[j + 1].name, mw));
554 else
555 printf("%-*s %s\n", mw,
556 center(s, year[j + 1].name, mw),
557 center(t, year[j + 2].name, mw));
558
559 if (mpl == 2)
560 printf(" %s %s %s %s %s %s %s "
561 " %s %s %s %s %s %s %.2s\n",
562 wds.names[6], wds.names[0], wds.names[1],
563 wds.names[2], wds.names[3], wds.names[4],
564 wds.names[5],
565 wds.names[6], wds.names[0], wds.names[1],
566 wds.names[2], wds.names[3], wds.names[4],
567 wds.names[5]);
568 else
569 printf("%s%s%s%s%s%s%s "
570 "%s%s%s%s%s%s%s "
571 "%s%s%s%s%s%s%.2s\n",
572 wds.names[6], wds.names[0], wds.names[1],
573 wds.names[2], wds.names[3], wds.names[4],
574 wds.names[5],
575 wds.names[6], wds.names[0], wds.names[1],
576 wds.names[2], wds.names[3], wds.names[4],
577 wds.names[5],
578 wds.names[6], wds.names[0], wds.names[1],
579 wds.names[2], wds.names[3], wds.names[4],
580 wds.names[5]);
581 for (i = 0; i != 6; i++) {
582 if (mpl == 2)
583 printf("%s %s\n",
584 year[j].lines[i]+1,
585 year[j + 1].lines[i]+1);
586 else
587 printf("%s %s %s\n",
588 year[j].lines[i]+1,
589 year[j + 1].lines[i]+1,
590 year[j + 2].lines[i]+1);
591
592 }
593 }
594 }
595
596 void
597 mkmonth(int y, int m, int jd_flag, struct monthlines *mlines)
598 {
599
600 struct tm tm; /* for strftime printing local names of
601 * months */
602 date dt; /* handy date */
603 int dw; /* width of numbers */
604 int first; /* first day of month */
605 int firstm; /* first day of first week of month */
606 int i, j, k, l; /* just indices */
607 int last; /* the first day of next month */
608 int lastm; /* first day of first week of next month */
609 int jan1 = 0; /* the first day of this year */
610 char *ds; /* pointer to day strings (daystr or
611 * jdaystr) */
612
613 /* Set name of month. */
614 memset(&tm, 0, sizeof(tm));
615 tm.tm_mon = m;
616 strftime(mlines->name, sizeof(mlines->name), "%OB", &tm);
617 mlines->name[0] = toupper((unsigned char)mlines->name[0]);
618
619 /*
620 * Set first and last to the day number of the first day of this
621 * month and the first day of next month respectively. Set jan1 to
622 * the day number of the first day of this year.
623 */
624 first = firstday(y, m + 1);
625 if (m == 11)
626 last = firstday(y + 1, 1);
627 else
628 last = firstday(y, m + 2);
629
630 if (jd_flag)
631 jan1 = firstday(y, 1);
632
633 /*
634 * Set firstm to the day number of monday of the first week of
635 * this month. (This might be in the last month)
636 * Set lastm to the day number of monday of the first week of
637 * the next month. Our canvas spans [firstm, lastm).
638 */
639 firstm = first - weekday(first);
640 lastm = last + 7 - weekday(last);
641
642 /* Set ds (daystring) and dw (daywidth) according to the jd_flag */
643 if (jd_flag) {
644 ds = jdaystr;
645 dw = 4;
646 } else {
647 ds = daystr;
648 dw = 3;
649 }
650
651 /*
652 * Fill the lines with day of month or day of year (julian day)
653 * line index: i, each line is one weekday. column index: j, each
654 * column is one day number. print column index: k.
655 */
656 for (i = 0; i != 7; i++) {
657 l = 0;
658 for (j = firstm + i, k = 0; j < lastm; j += 7, k += dw) {
659 if (j >= first && j < last) {
660 if (jd_flag)
661 dt.d = j - jan1 + 1;
662 else
663 sdate(j, &dt);
664 if (j == today && (term_so != NULL && term_se != NULL)) {
665 l = strlen(term_so);
666 /* separator */
667 mlines->lines[i][k] = ' ';
668 }
669 /* the actual text */
670 memcpy(mlines->lines[i] + k + l,
671 ds + dt.d * dw, dw);
672 if (j == today && (term_so != NULL && term_se != NULL)) {
673 /* highlight on */
674 memcpy(mlines->lines[i] + k + 1, term_so, l);
675 /* highlight off */
676 memcpy(mlines->lines[i] + k + l + dw, term_se,
677 strlen(term_se));
678 l = strlen(term_se) + strlen(term_so);
679 }
680 } else
681 memcpy(mlines->lines[i] + k + l, " ", dw);
682 }
683 mlines->lines[i][k + l] = '\0';
684
685 }
686
687 /* fill the weeknumbers */
688 if (flag_weeks) {
689 for (j = firstm, k = 0; j < lastm; k += dw, j += 7)
690 if (j <= nswitch || j >= last)
691 memset(mlines->weeks + k, ' ', dw);
692 else
693 memcpy(mlines->weeks + k,
694 ds + week(j, &i)*dw, dw);
695 mlines->weeks[k] = '\0';
696 }
697 }
698
699 void
700 mkmonthb(int y, int m, int jd_flag, struct monthlines *mlines)
701 {
702
703 struct tm tm; /* for strftime printing local names of
704 * months */
705 date dt; /* handy date */
706 int dw; /* width of numbers */
707 int first; /* first day of month */
708 int firsts; /* sunday of first week of month */
709 int i, j, k, l; /* just indices */
710 int jan1 = 0; /* the first day of this year */
711 int last; /* the first day of next month */
712 char *ds; /* pointer to day strings (daystr or
713 * jdaystr) */
714
715 /* Set ds (daystring) and dw (daywidth) according to the jd_flag */
716 if (jd_flag) {
717 ds = jdaystr;
718 dw = 4;
719 } else {
720 ds = daystr;
721 dw = 3;
722 }
723
724 /* Set name of month centered */
725 memset(&tm, 0, sizeof(tm));
726 tm.tm_mon = m;
727 strftime(mlines->name, sizeof(mlines->name), "%OB", &tm);
728 mlines->name[0] = toupper((unsigned char)mlines->name[0]);
729
730 /*
731 * Set first and last to the day number of the first day of this
732 * month and the first day of next month respectively. Set jan1 to
733 * the day number of Jan 1st of this year.
734 */
735 dt.y = y;
736 dt.m = m + 1;
737 dt.d = 1;
738 first = sndaysb(&dt);
739 if (m == 11) {
740 dt.y = y + 1;
741 dt.m = 1;
742 dt.d = 1;
743 } else {
744 dt.y = y;
745 dt.m = m + 2;
746 dt.d = 1;
747 }
748 last = sndaysb(&dt);
749
750 if (jd_flag) {
751 dt.y = y;
752 dt.m = 1;
753 dt.d = 1;
754 jan1 = sndaysb(&dt);
755 }
756
757 /*
758 * Set firsts to the day number of sunday of the first week of
759 * this month. (This might be in the last month)
760 */
761 firsts = first - (weekday(first)+1) % 7;
762
763 /*
764 * Fill the lines with day of month or day of year (Julian day)
765 * line index: i, each line is one week. column index: j, each
766 * column is one day number. print column index: k.
767 */
768 for (i = 0; i != 6; i++) {
769 l = 0;
770 for (j = firsts + 7 * i, k = 0; k != dw * 7;
771 j++, k += dw) {
772 if (j >= first && j < last) {
773 if (jd_flag)
774 dt.d = j - jan1 + 1;
775 else
776 sdateb(j, &dt);
777 if (j == today && (term_so != NULL && term_se != NULL)) {
778 l = strlen(term_so);
779 /* separator */
780 mlines->lines[i][k] = ' ';
781 }
782 /* the actual text */
783 memcpy(mlines->lines[i] + k + l,
784 ds + dt.d * dw, dw);
785 if (j == today && (term_so != NULL && term_se != NULL)) {
786 /* highlight on */
787 memcpy(mlines->lines[i] + k + 1, term_so, l);
788 /* highlight off */
789 memcpy(mlines->lines[i] + k + l + dw, term_se,
790 strlen(term_se));
791 l = strlen(term_se) + strlen(term_so);
792 }
793 } else
794 memcpy(mlines->lines[i] + k + l, " ", dw);
795 }
796 if (k == 0)
797 mlines->lines[i][1] = '\0';
798 else
799 mlines->lines[i][k + l] = '\0';
800 }
801 }
802
803 /* Put the local names of weekdays into the wds */
804 void
805 mkweekdays(struct weekdays *wds)
806 {
807 int i, len;
808 struct tm tm;
809 char buf[20];
810
811 memset(&tm, 0, sizeof(tm));
812
813 for (i = 0; i != 7; i++) {
814 tm.tm_wday = (i+1) % 7;
815 strftime(buf, sizeof(buf), "%a", &tm);
816 len = strlen(buf);
817 if (len > 2)
818 len = 2;
819 strcpy(wds->names[i], " ");
820 strncpy(wds->names[i] + 2 - len, buf, len);
821 }
822 }
823
824 /*
825 * Compute the day number of the first
826 * existing date after the first day in month.
827 * (the first day in month and even the month might not exist!)
828 */
829 int
830 firstday(int y, int m)
831 {
832 date dt;
833 int nd;
834
835 dt.y = y;
836 dt.m = m;
837 dt.d = 1;
838 nd = sndays(&dt);
839 for (;;) {
840 sdate(nd, &dt);
841 if ((dt.m >= m && dt.y == y) || dt.y > y)
842 return (nd);
843 else
844 nd++;
845 }
846 /* NEVER REACHED */
847 }
848
849 /*
850 * Compute the number of days from date, obey the local switch from
851 * Julian to Gregorian if specified by the user.
852 */
853 int
854 sndays(struct date *d)
855 {
856
857 if (nswitch != 0)
858 if (nswitch < ndaysj(d))
859 return (ndaysg(d));
860 else
861 return (ndaysj(d));
862 else
863 return ndaysg(d);
864 }
865
866 /*
867 * Compute the number of days from date, obey the switch from
868 * Julian to Gregorian as used by UK and her colonies.
869 */
870 int
871 sndaysb(struct date *d)
872 {
873
874 if (nswitchb < ndaysj(d))
875 return (ndaysg(d));
876 else
877 return (ndaysj(d));
878 }
879
880 /* Inverse of sndays */
881 struct date *
882 sdate(int nd, struct date *d)
883 {
884
885 if (nswitch < nd)
886 return (gdate(nd, d));
887 else
888 return (jdate(nd, d));
889 }
890
891 /* Inverse of sndaysb */
892 struct date *
893 sdateb(int nd, struct date *d)
894 {
895
896 if (nswitchb < nd)
897 return (gdate(nd, d));
898 else
899 return (jdate(nd, d));
900 }
901
902 /* Center string t in string s of length w by putting enough leading blanks */
903 char *
904 center(char *s, char *t, int w)
905 {
906 char blanks[80];
907
908 memset(blanks, ' ', sizeof(blanks));
909 sprintf(s, "%.*s%s", (int)(w - strlen(t)) / 2, blanks, t);
910 return (s);
911 }
912
913 int
914 parsemonth(const char *s)
915 {
916 int v;
917 char *cp;
918 struct tm tm;
919
920 v = (int)strtol(s, &cp, 10);
921 if (cp != s)
922 return (v);
923 if (strptime(s, "%B", &tm) != NULL)
924 return (tm.tm_mon + 1);
925 if (strptime(s, "%b", &tm) != NULL)
926 return (tm.tm_mon + 1);
927 return (0);
928 }
DragonFly BSD