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Set flow control pause time to 512us _again_ as it was two years ago
[dragonfly.git] / usr.bin / ncal / ncal.c
blob4db51f2564ac12bd9b14e22e4a2d14fb5a960a6f
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
42 /* Width of one month with backward compatibility */
43 #define MONTH_WIDTH_B_J 27
44 #define MONTH_WIDTH_B 20
45
46 #define MONTH_WIDTH_J 24
47 #define MONTH_WIDTH 18
48
49 #define MAX_WIDTH 28
50
51 typedef struct date date;
52
53 struct monthlines {
54 char name[MAX_WIDTH + 1];
55 char lines[7][MAX_WIDTH + 1];
56 char weeks[MAX_WIDTH + 1];
57 };
58
59 struct weekdays {
60 char names[7][4];
61 };
62
63 /* The switches from Julian to Gregorian in some countries */
64 static struct djswitch {
65 char *cc; /* Country code according to ISO 3166 */
66 char *nm; /* Name of country */
67 date dt; /* Last day of Julian calendar */
68 } switches[] = {
69 {"AL", "Albania", {1912, 11, 30}},
70 {"AT", "Austria", {1583, 10, 5}},
71 {"AU", "Australia", {1752, 9, 2}},
72 {"BE", "Belgium", {1582, 12, 14}},
73 {"BG", "Bulgaria", {1916, 3, 18}},
74 {"CA", "Canada", {1752, 9, 2}},
75 {"CH", "Switzerland", {1655, 2, 28}},
76 {"CN", "China", {1911, 12, 18}},
77 {"CZ", "Czech Republic",{1584, 1, 6}},
78 {"DE", "Germany", {1700, 2, 18}},
79 {"DK", "Denmark", {1700, 2, 18}},
80 {"ES", "Spain", {1582, 10, 4}},
81 {"FI", "Finland", {1753, 2, 17}},
82 {"FR", "France", {1582, 12, 9}},
83 {"GB", "United Kingdom",{1752, 9, 2}},
84 {"GR", "Greece", {1924, 3, 9}},
85 {"HU", "Hungary", {1587, 10, 21}},
86 {"IS", "Iceland", {1700, 11, 16}},
87 {"IT", "Italy", {1582, 10, 4}},
88 {"JP", "Japan", {1918, 12, 18}},
89 {"LI", "Lithuania", {1918, 2, 1}},
90 {"LN", "Latin", {9999, 05, 31}},
91 {"LU", "Luxembourg", {1582, 12, 14}},
92 {"LV", "Latvia", {1918, 2, 1}},
93 {"NL", "Netherlands", {1582, 12, 14}},
94 {"NO", "Norway", {1700, 2, 18}},
95 {"PL", "Poland", {1582, 10, 4}},
96 {"PT", "Portugal", {1582, 10, 4}},
97 {"RO", "Romania", {1919, 3, 31}},
98 {"RU", "Russia", {1918, 1, 31}},
99 {"SI", "Slovenia", {1919, 3, 4}},
100 {"SW", "Sweden", {1753, 2, 17}},
101 {"TR", "Turkey", {1926, 12, 18}},
102 {"US", "United States", {1752, 9, 2}},
103 {"YU", "Yugoslavia", {1919, 3, 4}}
104 };
105
106 struct djswitch *dftswitch =
107 switches + sizeof(switches) / sizeof(struct djswitch) - 2;
108 /* default switch (should be "US") */
109
110 /* Table used to print day of month and week numbers */
111 char daystr[] = " 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15"
112 " 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31"
113 " 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47"
114 " 48 49 50 51 52 53";
115
116 /* Table used to print day of year and week numbers */
117 char jdaystr[] = " 1 2 3 4 5 6 7 8 9"
118 " 10 11 12 13 14 15 16 17 18 19"
119 " 20 21 22 23 24 25 26 27 28 29"
120 " 30 31 32 33 34 35 36 37 38 39"
121 " 40 41 42 43 44 45 46 47 48 49"
122 " 50 51 52 53 54 55 56 57 58 59"
123 " 60 61 62 63 64 65 66 67 68 69"
124 " 70 71 72 73 74 75 76 77 78 79"
125 " 80 81 82 83 84 85 86 87 88 89"
126 " 90 91 92 93 94 95 96 97 98 99"
127 " 100 101 102 103 104 105 106 107 108 109"
128 " 110 111 112 113 114 115 116 117 118 119"
129 " 120 121 122 123 124 125 126 127 128 129"
130 " 130 131 132 133 134 135 136 137 138 139"
131 " 140 141 142 143 144 145 146 147 148 149"
132 " 150 151 152 153 154 155 156 157 158 159"
133 " 160 161 162 163 164 165 166 167 168 169"
134 " 170 171 172 173 174 175 176 177 178 179"
135 " 180 181 182 183 184 185 186 187 188 189"
136 " 190 191 192 193 194 195 196 197 198 199"
137 " 200 201 202 203 204 205 206 207 208 209"
138 " 210 211 212 213 214 215 216 217 218 219"
139 " 220 221 222 223 224 225 226 227 228 229"
140 " 230 231 232 233 234 235 236 237 238 239"
141 " 240 241 242 243 244 245 246 247 248 249"
142 " 250 251 252 253 254 255 256 257 258 259"
143 " 260 261 262 263 264 265 266 267 268 269"
144 " 270 271 272 273 274 275 276 277 278 279"
145 " 280 281 282 283 284 285 286 287 288 289"
146 " 290 291 292 293 294 295 296 297 298 299"
147 " 300 301 302 303 304 305 306 307 308 309"
148 " 310 311 312 313 314 315 316 317 318 319"
149 " 320 321 322 323 324 325 326 327 328 329"
150 " 330 331 332 333 334 335 336 337 338 339"
151 " 340 341 342 343 344 345 346 347 348 349"
152 " 350 351 352 353 354 355 356 357 358 359"
153 " 360 361 362 363 364 365 366";
154
155 int flag_weeks; /* user wants number of week */
156 int nswitch; /* user defined switch date */
157 int nswitchb; /* switch date for backward compatibility */
158
159 char *center(char *s, char *t, int w);
160 void mkmonth(int year, int month, int jd_flag, struct monthlines * monthl);
161 void mkmonthb(int year, int month, int jd_flag, struct monthlines * monthl);
162 void mkweekdays(struct weekdays * wds);
163 int parsemonth(const char *s);
164 void printcc(void);
165 void printeaster(int year, int julian, int orthodox);
166 void printmonth(int year, int month, int jd_flag);
167 void printmonthb(int year, int month, int jd_flag);
168 void printyear(int year, int jd_flag);
169 void printyearb(int year, int jd_flag);
170 int firstday(int y, int m);
171 date *sdate(int ndays, struct date * d);
172 date *sdateb(int ndays, struct date * d);
173 int sndays(struct date * d);
174 int sndaysb(struct date * d);
175 static void usage(void);
176 int weekdayb(int nd);
177
178 int
179 main(int argc, char *argv[])
180 {
181 struct djswitch *p, *q; /* to search user defined switch date */
182 date never = {10000, 1, 1}; /* outside valid range of dates */
183 date ukswitch = {1752, 9, 2};/* switch date for Great Britain */
184 int ch; /* holds the option character */
185 int m = 0; /* month */
186 int y = 0; /* year */
187 int flag_backward = 0; /* user called cal--backward compat. */
188 int flag_hole_year = 0; /* user wants the whole year */
189 int flag_julian_cal = 0; /* user wants Julian Calendar */
190 int flag_julian_day = 0; /* user wants the Julian day
191 * numbers */
192 int flag_orthodox = 0; /* use wants Orthodox easter */
193 int flag_easter = 0; /* use wants easter date */
194 char *cp; /* character pointer */
195 char *locale; /* locale to get country code */
196
197 /*
198 * Use locale to determine the country code,
199 * and use the country code to determine the default
200 * switchdate and date format from the switches table.
201 */
202 if ((locale = setlocale(LC_ALL, "")) == NULL)
203 warn("setlocale");
204 locale = setlocale(LC_TIME, NULL);
205 if (locale == NULL ||
206 strcmp(locale, "C") == 0 ||
207 strcmp(locale, "POSIX") == 0 ||
208 strcmp(locale, "ASCII") == 0 ||
209 strcmp(locale, "US-ASCII") == 0)
210 locale = "_US";
211 q = switches + sizeof(switches) / sizeof(struct djswitch);
212 for (p = switches; p != q; p++)
213 if ((cp = strstr(locale, p->cc)) != NULL && *(cp - 1) == '_')
214 break;
215 if (p == q) {
216 nswitch = ndaysj(&dftswitch->dt);
217 } else {
218 nswitch = ndaysj(&p->dt);
219 dftswitch = p;
220 }
221
222
223 /*
224 * Get the filename portion of argv[0] and set flag_backward if
225 * this program is called "cal".
226 */
227 for (cp = argv[0]; *cp; cp++)
228 ;
229 while (cp >= argv[0] && *cp != '/')
230 cp--;
231 if (strcmp("cal", ++cp) == 0)
232 flag_backward = 1;
233
234 /* Set the switch date to United Kingdom if backwards compatible */
235 if (flag_backward)
236 nswitchb = ndaysj(&ukswitch);
237
238 while ((ch = getopt(argc, argv, "Jejops:wy")) != -1)
239 switch (ch) {
240 case 'J':
241 if (flag_backward)
242 usage();
243 nswitch = ndaysj(&never);
244 flag_julian_cal = 1;
245 break;
246 case 'e':
247 if (flag_backward)
248 usage();
249 flag_easter = 1;
250 break;
251 case 'j':
252 flag_julian_day = 1;
253 break;
254 case 'o':
255 if (flag_backward)
256 usage();
257 flag_orthodox = 1;
258 flag_easter = 1;
259 break;
260 case 'p':
261 if (flag_backward)
262 usage();
263 printcc();
264 return (0);
265 break;
266 case 's':
267 if (flag_backward)
268 usage();
269 q = switches +
270 sizeof(switches) / sizeof(struct djswitch);
271 for (p = switches;
272 p != q && strcmp(p->cc, optarg) != 0; p++)
273 ;
274 if (p == q)
275 errx(EX_USAGE,
276 "%s: invalid country code", optarg);
277 nswitch = ndaysj(&(p->dt));
278 break;
279 case 'w':
280 if (flag_backward)
281 usage();
282 flag_weeks = 1;
283 break;
284 case 'y':
285 flag_hole_year = 1;
286 break;
287 default:
288 usage();
289 }
290
291 argc -= optind;
292 argv += optind;
293
294 if (argc == 0) {
295 time_t t;
296 struct tm *tm;
297
298 t = time(NULL);
299 tm = localtime(&t);
300 y = tm->tm_year + 1900;
301 m = tm->tm_mon + 1;
302 }
303
304 switch (argc) {
305 case 2:
306 if (flag_easter)
307 usage();
308 m = parsemonth(*argv++);
309 if (m < 1 || m > 12)
310 errx(EX_USAGE,
311 "%s is neither a month number (1..12) nor a name",
312 argv[-1]);
313 /* FALLTHROUGH */
314 case 1:
315 y = atoi(*argv++);
316 if (y < 1 || y > 9999)
317 errx(EX_USAGE, "year %d not in range 1..9999", y);
318 break;
319 case 0:
320 break;
321 default:
322 usage();
323 }
324
325 if (flag_easter)
326 printeaster(y, flag_julian_cal, flag_orthodox);
327 else if (argc == 1 || flag_hole_year)
328 if (flag_backward)
329 printyearb(y, flag_julian_day);
330 else
331 printyear(y, flag_julian_day);
332 else
333 if (flag_backward)
334 printmonthb(y, m, flag_julian_day);
335 else
336 printmonth(y, m, flag_julian_day);
337
338 return (0);
339 }
340
341 static void
342 usage(void)
343 {
344
345 fprintf(stderr, "%s\n%s\n%s\n",
346 "usage: cal [-jy] [[month] year]",
347 " ncal [-Jjpwy] [-s country_code] [[month] year]",
348 " ncal [-Jeo] [year]");
349 exit(EX_USAGE);
350 }
351
352 /* print the assumed switches for all countries */
353 void
354 printcc(void)
355 {
356 struct djswitch *p;
357 int n; /* number of lines to print */
358 int m; /* offset from left to right table entry on the same line */
359
360 #define FSTR "%c%s %-15s%4d-%02d-%02d"
361 #define DFLT(p) ((p) == dftswitch ? '*' : ' ')
362 #define FSTRARG(p) DFLT(p), (p)->cc, (p)->nm, (p)->dt.y, (p)->dt.m, (p)->dt.d
363
364 n = sizeof(switches) / sizeof(struct djswitch);
365 m = (n + 1) / 2;
366 n /= 2;
367 for (p = switches; p != switches + n; p++)
368 printf(FSTR" "FSTR"\n", FSTRARG(p), FSTRARG(p+m));
369 if (m != n)
370 printf(FSTR"\n", FSTRARG(p));
371 }
372
373 /* print the date of easter sunday */
374 void
375 printeaster(int y, int julian, int orthodox)
376 {
377 date dt;
378 struct tm tm;
379 char buf[80];
380 static int d_first = -1;
381
382 if (d_first < 0)
383 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
384 /* force orthodox easter for years before 1583 */
385 if (y < 1583)
386 orthodox = 1;
387
388 if (orthodox)
389 if (julian)
390 easteroj(y, &dt);
391 else
392 easterog(y, &dt);
393 else
394 easterg(y, &dt);
395
396 memset(&tm, 0, sizeof(tm));
397 tm.tm_year = dt.y - 1900;
398 tm.tm_mon = dt.m - 1;
399 tm.tm_mday = dt.d;
400 strftime(buf, sizeof(buf), d_first ? "%e %B %Y" : "%B %e %Y", &tm);
401 printf("%s\n", buf);
402 }
403
404 void
405 printmonth(int y, int m, int jd_flag)
406 {
407 struct monthlines month;
408 struct weekdays wds;
409 int i;
410
411 mkmonth(y, m - 1, jd_flag, &month);
412 mkweekdays(&wds);
413 printf(" %s %d\n", month.name, y);
414 for (i = 0; i != 7; i++)
415 printf("%.2s%s\n", wds.names[i], month.lines[i]);
416 if (flag_weeks)
417 printf(" %s\n", month.weeks);
418 }
419
420 void
421 printmonthb(int y, int m, int jd_flag)
422 {
423 struct monthlines month;
424 struct weekdays wds;
425 char s[MAX_WIDTH], t[MAX_WIDTH];
426 int i;
427 int mw;
428
429 mkmonthb(y, m - 1, jd_flag, &month);
430 mkweekdays(&wds);
431
432 mw = jd_flag ? MONTH_WIDTH_B_J : MONTH_WIDTH_B;
433
434 sprintf(s, "%s %d", month.name, y);
435 printf("%s\n", center(t, s, mw));
436
437 if (jd_flag)
438 printf(" %s %s %s %s %s %s %.2s\n", wds.names[6], wds.names[0],
439 wds.names[1], wds.names[2], wds.names[3],
440 wds.names[4], wds.names[5]);
441 else
442 printf("%s%s%s%s%s%s%.2s\n", wds.names[6], wds.names[0],
443 wds.names[1], wds.names[2], wds.names[3],
444 wds.names[4], wds.names[5]);
445
446 for (i = 0; i != 6; i++)
447 printf("%s\n", month.lines[i]+1);
448 }
449
450 void
451 printyear(int y, int jd_flag)
452 {
453 struct monthlines year[12];
454 struct weekdays wds;
455 char s[80], t[80];
456 int i, j;
457 int mpl;
458 int mw;
459
460 for (i = 0; i != 12; i++)
461 mkmonth(y, i, jd_flag, year + i);
462 mkweekdays(&wds);
463 mpl = jd_flag ? 3 : 4;
464 mw = jd_flag ? MONTH_WIDTH_J : MONTH_WIDTH;
465
466 sprintf(s, "%d", y);
467 printf("%s\n", center(t, s, mpl * mw));
468
469 for (j = 0; j != 12; j += mpl) {
470 printf(" %-*s%-*s",
471 mw, year[j].name,
472 mw, year[j + 1].name);
473 if (mpl == 3)
474 printf("%s\n", year[j + 2].name);
475 else
476 printf("%-*s%s\n",
477 mw, year[j + 2].name,
478 year[j + 3].name);
479 for (i = 0; i != 7; i++) {
480 printf("%.2s%-*s%-*s",
481 wds.names[i],
482 mw, year[j].lines[i],
483 mw, year[j + 1].lines[i]);
484 if (mpl == 3)
485 printf("%s\n", year[j + 2].lines[i]);
486 else
487 printf("%-*s%s\n",
488 mw, year[j + 2].lines[i],
489 year[j + 3].lines[i]);
490 }
491 if (flag_weeks) {
492 if (mpl == 3)
493 printf(" %-*s%-*s%-s\n",
494 mw, year[j].weeks,
495 mw, year[j + 1].weeks,
496 year[j + 2].weeks);
497 else
498 printf(" %-*s%-*s%-*s%-s\n",
499 mw, year[j].weeks,
500 mw, year[j + 1].weeks,
501 mw, year[j + 2].weeks,
502 year[j + 3].weeks);
503 }
504 }
505 }
506
507 void
508 printyearb(int y, int jd_flag)
509 {
510 struct monthlines year[12];
511 struct weekdays wds;
512 char s[80], t[80];
513 int i, j;
514 int mpl;
515 int mw;
516
517 for (i = 0; i != 12; i++)
518 mkmonthb(y, i, jd_flag, year + i);
519 mkweekdays(&wds);
520 mpl = jd_flag ? 2 : 3;
521 mw = jd_flag ? MONTH_WIDTH_B_J : MONTH_WIDTH_B;
522
523 sprintf(s, "%d", y);
524 printf("%s\n\n", center(t, s, mw * mpl + mpl));
525
526 for (j = 0; j != 12; j += mpl) {
527 printf("%-*s ", mw, center(s, year[j].name, mw));
528 if (mpl == 2)
529 printf("%s\n", center(s, year[j + 1].name, mw));
530 else
531 printf("%-*s %s\n", mw,
532 center(s, year[j + 1].name, mw),
533 center(t, year[j + 2].name, mw));
534
535 if (mpl == 2)
536 printf(" %s %s %s %s %s %s %s "
537 " %s %s %s %s %s %s %.2s\n",
538 wds.names[6], wds.names[0], wds.names[1],
539 wds.names[2], wds.names[3], wds.names[4],
540 wds.names[5],
541 wds.names[6], wds.names[0], wds.names[1],
542 wds.names[2], wds.names[3], wds.names[4],
543 wds.names[5]);
544 else
545 printf("%s%s%s%s%s%s%s "
546 "%s%s%s%s%s%s%s "
547 "%s%s%s%s%s%s%.2s\n",
548 wds.names[6], wds.names[0], wds.names[1],
549 wds.names[2], wds.names[3], wds.names[4],
550 wds.names[5],
551 wds.names[6], wds.names[0], wds.names[1],
552 wds.names[2], wds.names[3], wds.names[4],
553 wds.names[5],
554 wds.names[6], wds.names[0], wds.names[1],
555 wds.names[2], wds.names[3], wds.names[4],
556 wds.names[5]);
557 for (i = 0; i != 6; i++) {
558 if (mpl == 2)
559 printf("%-*s %s\n",
560 mw, year[j].lines[i]+1,
561 year[j + 1].lines[i]+1);
562 else
563 printf("%-*s %-*s %s\n",
564 mw, year[j].lines[i]+1,
565 mw, year[j + 1].lines[i]+1,
566 year[j + 2].lines[i]+1);
567
568 }
569 }
570 }
571
572 void
573 mkmonth(int y, int m, int jd_flag, struct monthlines *mlines)
574 {
575
576 struct tm tm; /* for strftime printing local names of
577 * months */
578 date dt; /* handy date */
579 int dw; /* width of numbers */
580 int first; /* first day of month */
581 int firstm; /* first day of first week of month */
582 int i, j, k; /* just indices */
583 int last; /* the first day of next month */
584 int jan1 = 0; /* the first day of this year */
585 char *ds; /* pointer to day strings (daystr or
586 * jdaystr) */
587
588 /* Set name of month. */
589 memset(&tm, 0, sizeof(tm));
590 tm.tm_mon = m;
591 strftime(mlines->name, sizeof(mlines->name), "%OB", &tm);
592 mlines->name[0] = toupper((unsigned char)mlines->name[0]);
593
594 /*
595 * Set first and last to the day number of the first day of this
596 * month and the first day of next month respectively. Set jan1 to
597 * the day number of the first day of this year.
598 */
599 first = firstday(y, m + 1);
600 if (m == 11)
601 last = firstday(y + 1, 1);
602 else
603 last = firstday(y, m + 2);
604
605 if (jd_flag)
606 jan1 = firstday(y, 1);
607
608 /*
609 * Set firstm to the day number of monday of the first week of
610 * this month. (This might be in the last month)
611 */
612 firstm = first - weekday(first);
613
614 /* Set ds (daystring) and dw (daywidth) according to the jd_flag */
615 if (jd_flag) {
616 ds = jdaystr;
617 dw = 4;
618 } else {
619 ds = daystr;
620 dw = 3;
621 }
622
623 /*
624 * Fill the lines with day of month or day of year (julian day)
625 * line index: i, each line is one weekday. column index: j, each
626 * column is one day number. print column index: k.
627 */
628 for (i = 0; i != 7; i++) {
629 for (j = firstm + i, k = 0; j < last; j += 7, k += dw)
630 if (j >= first) {
631 if (jd_flag)
632 dt.d = j - jan1 + 1;
633 else
634 sdate(j, &dt);
635 memcpy(mlines->lines[i] + k,
636 ds + dt.d * dw, dw);
637 } else
638 memcpy(mlines->lines[i] + k, " ", dw);
639 mlines->lines[i][k] = '\0';
640
641 }
642
643 /* fill the weeknumbers */
644 if (flag_weeks) {
645 for (j = firstm, k = 0; j < last; k += dw, j += 7)
646 if (j <= nswitch)
647 memset(mlines->weeks + k, ' ', dw);
648 else
649 memcpy(mlines->weeks + k,
650 ds + week(j, &i)*dw, dw);
651 mlines->weeks[k] = '\0';
652 }
653 }
654
655 void
656 mkmonthb(int y, int m, int jd_flag, struct monthlines *mlines)
657 {
658
659 struct tm tm; /* for strftime printing local names of
660 * months */
661 date dt; /* handy date */
662 int dw; /* width of numbers */
663 int first; /* first day of month */
664 int firsts; /* sunday of first week of month */
665 int i, j, k; /* just indices */
666 int jan1 = 0; /* the first day of this year */
667 int last; /* the first day of next month */
668 char *ds; /* pointer to day strings (daystr or
669 * jdaystr) */
670
671 /* Set ds (daystring) and dw (daywidth) according to the jd_flag */
672 if (jd_flag) {
673 ds = jdaystr;
674 dw = 4;
675 } else {
676 ds = daystr;
677 dw = 3;
678 }
679
680 /* Set name of month centered */
681 memset(&tm, 0, sizeof(tm));
682 tm.tm_mon = m;
683 strftime(mlines->name, sizeof(mlines->name), "%OB", &tm);
684 mlines->name[0] = toupper((unsigned char)mlines->name[0]);
685
686 /*
687 * Set first and last to the day number of the first day of this
688 * month and the first day of next month respectively. Set jan1 to
689 * the day number of Jan 1st of this year.
690 */
691 dt.y = y;
692 dt.m = m + 1;
693 dt.d = 1;
694 first = sndaysb(&dt);
695 if (m == 11) {
696 dt.y = y + 1;
697 dt.m = 1;
698 dt.d = 1;
699 } else {
700 dt.y = y;
701 dt.m = m + 2;
702 dt.d = 1;
703 }
704 last = sndaysb(&dt);
705
706 if (jd_flag) {
707 dt.y = y;
708 dt.m = 1;
709 dt.d = 1;
710 jan1 = sndaysb(&dt);
711 }
712
713 /*
714 * Set firsts to the day number of sunday of the first week of
715 * this month. (This might be in the last month)
716 */
717 firsts = first - (weekday(first)+1) % 7;
718
719 /*
720 * Fill the lines with day of month or day of year (Julian day)
721 * line index: i, each line is one week. column index: j, each
722 * column is one day number. print column index: k.
723 */
724 for (i = 0; i != 6; i++) {
725 for (j = firsts + 7 * i, k = 0; j < last && k != dw * 7;
726 j++, k += dw)
727 if (j >= first) {
728 if (jd_flag)
729 dt.d = j - jan1 + 1;
730 else
731 sdateb(j, &dt);
732 memcpy(mlines->lines[i] + k,
733 ds + dt.d * dw, dw);
734 } else
735 memcpy(mlines->lines[i] + k, " ", dw);
736 if (k == 0)
737 mlines->lines[i][1] = '\0';
738 else
739 mlines->lines[i][k] = '\0';
740 }
741 }
742
743 /* Put the local names of weekdays into the wds */
744 void
745 mkweekdays(struct weekdays *wds)
746 {
747 int i, len;
748 struct tm tm;
749 char buf[20];
750
751 memset(&tm, 0, sizeof(tm));
752
753 for (i = 0; i != 7; i++) {
754 tm.tm_wday = (i+1) % 7;
755 strftime(buf, sizeof(buf), "%a", &tm);
756 len = strlen(buf);
757 if (len > 2)
758 len = 2;
759 strcpy(wds->names[i], " ");
760 strncpy(wds->names[i] + 2 - len, buf, len);
761 }
762 }
763
764 /*
765 * Compute the day number of the first
766 * existing date after the first day in month.
767 * (the first day in month and even the month might not exist!)
768 */
769 int
770 firstday(int y, int m)
771 {
772 date dt;
773 int nd;
774
775 dt.y = y;
776 dt.m = m;
777 dt.d = 1;
778 nd = sndays(&dt);
779 for (;;) {
780 sdate(nd, &dt);
781 if ((dt.m >= m && dt.y == y) || dt.y > y)
782 return (nd);
783 else
784 nd++;
785 }
786 /* NEVER REACHED */
787 }
788
789 /*
790 * Compute the number of days from date, obey the local switch from
791 * Julian to Gregorian if specified by the user.
792 */
793 int
794 sndays(struct date *d)
795 {
796
797 if (nswitch != 0)
798 if (nswitch < ndaysj(d))
799 return (ndaysg(d));
800 else
801 return (ndaysj(d));
802 else
803 return ndaysg(d);
804 }
805
806 /*
807 * Compute the number of days from date, obey the switch from
808 * Julian to Gregorian as used by UK and her colonies.
809 */
810 int
811 sndaysb(struct date *d)
812 {
813
814 if (nswitchb < ndaysj(d))
815 return (ndaysg(d));
816 else
817 return (ndaysj(d));
818 }
819
820 /* Inverse of sndays */
821 struct date *
822 sdate(int nd, struct date *d)
823 {
824
825 if (nswitch < nd)
826 return (gdate(nd, d));
827 else
828 return (jdate(nd, d));
829 }
830
831 /* Inverse of sndaysb */
832 struct date *
833 sdateb(int nd, struct date *d)
834 {
835
836 if (nswitchb < nd)
837 return (gdate(nd, d));
838 else
839 return (jdate(nd, d));
840 }
841
842 /* Center string t in string s of length w by putting enough leading blanks */
843 char *
844 center(char *s, char *t, int w)
845 {
846 char blanks[80];
847
848 memset(blanks, ' ', sizeof(blanks));
849 sprintf(s, "%.*s%s", (int)(w - strlen(t)) / 2, blanks, t);
850 return (s);
851 }
852
853 int
854 parsemonth(const char *s)
855 {
856 int v;
857 char *cp;
858 struct tm tm;
859
860 v = (int)strtol(s, &cp, 10);
861 if (cp != s)
862 return (v);
863 if (strptime(s, "%B", &tm) != NULL)
864 return (tm.tm_mon + 1);
865 if (strptime(s, "%b", &tm) != NULL)
866 return (tm.tm_mon + 1);
867 return (0);
868 }
DragonFly BSD