2 * Copyright (c) 1989, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
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6 * modification, are permitted provided that the following conditions
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13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
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33 * $FreeBSD: src/usr.bin/calendar/day.c,v 1.13.2.5 2003/04/06 20:04:57 dwmalone Exp $
34 * $DragonFly: src/usr.bin/calendar/day.c,v 1.5 2006/09/16 18:38:00 pavalos Exp $
37 #include <sys/types.h>
47 #include "pathnames.h"
50 extern struct iovec header[];
55 static char dayname[10];
56 static int offset, yrdays;
58 /* 1-based month, 0-based days, cumulative */
59 static int daytab[][14] = {
60 { 0, -1, 30, 58, 89, 119, 150, 180, 211, 242, 272, 303, 333, 364 },
61 { 0, -1, 30, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
64 static char const *days[] = {
65 "sun", "mon", "tue", "wed", "thu", "fri", "sat", NULL,
68 static const char *months[] = {
69 "jan", "feb", "mar", "apr", "may", "jun",
70 "jul", "aug", "sep", "oct", "nov", "dec", NULL,
73 static struct fixs fndays[8]; /* full national days names */
74 static struct fixs ndays[8]; /* short national days names */
76 static struct fixs fnmonths[13]; /* full national months names */
77 static struct fixs nmonths[13]; /* short national month names */
86 for (i = 0; i < 7; i++) {
88 strftime(buf, sizeof(buf), "%a", &tm);
90 l > 0 && isspace((unsigned char)buf[l - 1]);
94 if (ndays[i].name != NULL)
96 if ((ndays[i].name = strdup(buf)) == NULL)
97 errx(EXIT_FAILURE, "cannot allocate memory");
98 ndays[i].len = strlen(buf);
100 strftime(buf, sizeof(buf), "%A", &tm);
101 for (l = strlen(buf);
102 l > 0 && isspace((unsigned char)buf[l - 1]);
106 if (fndays[i].name != NULL)
107 free(fndays[i].name);
108 if ((fndays[i].name = strdup(buf)) == NULL)
109 errx(EXIT_FAILURE, "cannot allocate memory");
110 fndays[i].len = strlen(buf);
113 for (i = 0; i < 12; i++) {
115 strftime(buf, sizeof(buf), "%b", &tm);
116 for (l = strlen(buf);
117 l > 0 && isspace((unsigned char)buf[l - 1]);
121 if (nmonths[i].name != NULL)
122 free(nmonths[i].name);
123 if ((nmonths[i].name = strdup(buf)) == NULL)
124 errx(EXIT_FAILURE, "cannot allocate memory");
125 nmonths[i].len = strlen(buf);
127 strftime(buf, sizeof(buf), "%B", &tm);
128 for (l = strlen(buf);
129 l > 0 && isspace((unsigned char)buf[l - 1]);
133 if (fnmonths[i].name != NULL)
134 free(fnmonths[i].name);
135 if ((fnmonths[i].name = strdup(buf)) == NULL)
136 errx(EXIT_FAILURE, "cannot allocate memory");
137 fnmonths[i].len = strlen(buf);
146 tp = localtime(&now);
147 if (isleap(tp->tm_year + 1900)) {
154 /* Friday displays Monday's events */
155 offset = tp->tm_wday == Friday ? 3 : 1;
156 header[5].iov_base = dayname;
159 lbufp = setlocale(LC_TIME, NULL);
160 if (lbufp != NULL && (oldl = strdup(lbufp)) == NULL)
161 errx(EXIT_FAILURE, "cannot allocate memory");
162 setlocale(LC_TIME, "C");
163 header[5].iov_len = strftime(dayname, sizeof(dayname), "%A", tp);
164 setlocale(LC_TIME, (oldl != NULL ? oldl : ""));
171 /* convert Day[/Month][/Year] into unix time (since 1970)
172 * Day: two digits, Month: two digits, Year: digits
188 tm.tm_mday = tp->tm_mday;
189 tm.tm_mon = tp->tm_mon;
190 tm.tm_year = tp->tm_year;
192 switch (sscanf(dp, "%d.%d.%d", &d, &m, &y)) {
206 fprintf(stderr, "Mktime: %d %d %s\n", (int)mktime(&tm), (int)t,
213 * Possible date formats include any combination of:
214 * 3-charmonth (January, Jan, Jan)
215 * 3-charweekday (Friday, Monday, mon.)
216 * numeric month or day (1, 2, 04)
218 * Any character may separate them, or they may not be separated. Any line,
219 * following a line that is matched, that starts with "whitespace", is shown
220 * along with the matched line.
223 isnow(char *endp, int *monthp, int *dayp, int *varp)
225 int day, flags, month = 0, v1, v2;
231 * Monthname: Jan .. Dec
239 /* read first field */
240 /* didn't recognize anything, skip it */
241 if (!(v1 = getfield(endp, &endp, &flags)))
244 /* Easter or Easter depending days */
245 if (flags & F_EASTER)
246 day = v1 - 1; /* days since January 1 [0-365] */
249 * 1. {Weekday,Day} XYZ ...
253 else if (flags & F_ISDAY || v1 > 12) {
255 /* found a day; day: 1-31 or weekday: 1-7 */
258 /* {Day,Weekday} {Month,Monthname} ... */
259 /* if no recognizable month, assume just a day alone
260 * in other words, find month or use current month */
261 if (!(month = getfield(endp, &endp, &flags)))
262 month = tp->tm_mon + 1;
265 /* 2. {Monthname} XYZ ... */
266 else if (flags & F_ISMONTH) {
269 /* Monthname {day,weekday} */
270 /* if no recognizable day, assume the first day in month */
271 if (!(day = getfield(endp, &endp, &flags)))
277 v2 = getfield(endp, &endp, &flags);
280 * {Day} {Monthname} ...
283 if (flags & F_ISMONTH) {
289 /* {Month} {Weekday,Day} ... */
291 /* F_ISDAY set, v2 > 12, or no way to tell */
293 /* if no recognizable day, assume the first */
299 /* convert Weekday into *next* Day,
300 * e.g.: 'Sunday' -> 22
303 if (flags & F_ISDAY) {
305 fprintf(stderr, "\nday: %d %s month %d\n", day, endp, month);
309 /* variable weekday, SundayLast, MondayFirst ... */
310 if (day < 0 || day >= 10) {
312 /* negative offset; last, -4 .. -1 */
314 v1 = day/10 - 1; /* offset -4 ... -1 */
315 day = 10 + (day % 10); /* day 1 ... 7 */
318 v2 = tp->tm_mday + (((day - 1) - tp->tm_wday + 7) % 7);
320 /* (month length - day) / 7 + 1 */
321 if (cumdays[month+1] - cumdays[month] >= v2
322 && ((int)((cumdays[month+1] -
323 cumdays[month] - v2) / 7) + 1) == -v1)
327 /* set to yesterday */
329 day = tp->tm_mday - 1;
335 /* first, second ... +1 ... +5 */
337 v1 = day/10; /* offset: +1 (first Sunday) ... */
341 v2 = tp->tm_mday + (((day - 1) - tp->tm_wday + 7) % 7);
343 /* Hurrah! matched */
344 if (((v2 - 1 + 7) / 7) == v1)
347 /* set to yesterday */
349 day = tp->tm_mday - 1;
358 day = tp->tm_mday + (((day - 1) - tp->tm_wday + 7) % 7);
363 if (!(flags & F_EASTER)) {
366 day = cumdays[month] + day;
369 for (v1 = 0; day > cumdays[v1]; v1++)
372 *dayp = day - cumdays[v1 - 1];
377 fprintf(stderr, "day2: day %d(%d-%d) yday %d\n", *dayp, day, cumdays[month], tp->tm_yday);
379 /* if today or today + offset days */
380 if (day >= tp->tm_yday - f_dayBefore &&
381 day <= tp->tm_yday + offset + f_dayAfter)
384 /* if number of days left in this year + days to event in next year */
385 if (yrdays - tp->tm_yday + day <= offset + f_dayAfter ||
386 /* a year backward, eg. 6 Jan and 10 days before -> 27. Dec */
387 tp->tm_yday + day - f_dayBefore < 0
400 for (n = fnmonths; n->name; ++n)
401 if (!strncasecmp(s, n->name, n->len))
402 return ((n - fnmonths) + 1);
403 for (n = nmonths; n->name; ++n)
404 if (!strncasecmp(s, n->name, n->len))
405 return ((n - nmonths) + 1);
406 for (p = months; *p; ++p)
407 if (!strncasecmp(s, *p, 3))
408 return ((p - months) + 1);
419 for (n = fndays; n->name; ++n)
420 if (!strncasecmp(s, n->name, n->len))
421 return((n - fndays) + 1);
422 for (n = ndays; n->name; ++n)
423 if (!strncasecmp(s, n->name, n->len))
424 return((n - ndays) + 1);
425 for (p = days; *p; ++p)
426 if (!strncasecmp(s, *p, 3))
427 return((p - days) + 1);
431 /* return offset for variable weekdays
432 * -1 -> last weekday in month
433 * +1 -> first weekday in month
445 /* Sun+1 or Wednesday-2
448 /* fprintf(stderr, "x: %s %s %d\n", s, s + offs - 2, offs); */
449 switch(*(s + offs - 2)) {
451 return(-(atoi(s + offs - 1)));
454 return(atoi(s + offs - 1));
460 * some aliases: last, first, second, third, fourth
464 if (offs > 4 && !strcasecmp(s + offs - 4, "last"))
466 else if (offs > 5 && !strcasecmp(s + offs - 5, "first"))
468 else if (offs > 6 && !strcasecmp(s + offs - 6, "second"))
470 else if (offs > 5 && !strcasecmp(s + offs - 5, "third"))
472 else if (offs > 6 && !strcasecmp(s + offs - 6, "fourth"))
476 /* no offset detected */