2 * Copyright (c) 1989, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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 * 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.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
37 #include <sys/types.h>
47 #include "pathnames.h"
51 static const struct tm tm0;
56 /* 1-based month, 0-based days, cumulative */
58 {0, -1, 30, 58, 89, 119, 150, 180, 211, 242, 272, 303, 333, 364},
59 {0, -1, 30, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365},
62 static char const *days[] = {
63 "sun", "mon", "tue", "wed", "thu", "fri", "sat", NULL,
66 static const char *months[] = {
67 "jan", "feb", "mar", "apr", "may", "jun",
68 "jul", "aug", "sep", "oct", "nov", "dec", NULL,
71 static struct fixs fndays[8]; /* full national days names */
72 static struct fixs ndays[8]; /* short national days names */
74 static struct fixs fnmonths[13]; /* full national months names */
75 static struct fixs nmonths[13]; /* short national month names */
85 for (i = 0; i < 7; i++) {
87 strftime(buf, sizeof(buf), "%a", &tm);
89 l > 0 && isspace((unsigned char)buf[l - 1]);
93 if (ndays[i].name != NULL)
95 if ((ndays[i].name = strdup(buf)) == NULL)
96 errx(1, "cannot allocate memory");
97 ndays[i].len = strlen(buf);
99 strftime(buf, sizeof(buf), "%A", &tm);
100 for (l = strlen(buf);
101 l > 0 && isspace((unsigned char)buf[l - 1]);
105 if (fndays[i].name != NULL)
106 free(fndays[i].name);
107 if ((fndays[i].name = strdup(buf)) == NULL)
108 errx(1, "cannot allocate memory");
109 fndays[i].len = strlen(buf);
112 for (i = 0; i < 12; i++) {
114 strftime(buf, sizeof(buf), "%b", &tm);
115 for (l = strlen(buf);
116 l > 0 && isspace((unsigned char)buf[l - 1]);
120 if (nmonths[i].name != NULL)
121 free(nmonths[i].name);
122 if ((nmonths[i].name = strdup(buf)) == NULL)
123 errx(1, "cannot allocate memory");
124 nmonths[i].len = strlen(buf);
126 strftime(buf, sizeof(buf), "%B", &tm);
127 for (l = strlen(buf);
128 l > 0 && isspace((unsigned char)buf[l - 1]);
132 if (fnmonths[i].name != NULL)
133 free(fnmonths[i].name);
134 if ((fnmonths[i].name = strdup(buf)) == NULL)
135 errx(1, "cannot allocate memory");
136 fnmonths[i].len = strlen(buf);
145 tp = localtime(&now);
146 if (isleap(tp->tm_year + 1900)) {
153 /* Friday displays Monday's events */
154 if (f_dayAfter == 0 && f_dayBefore == 0 && Friday != -1)
155 f_dayAfter = 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(1, "cannot allocate memory");
162 (void)setlocale(LC_TIME, "C");
163 header[5].iov_len = strftime(dayname, sizeof(dayname), "%A", tp);
164 (void)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
185 tm.tm_mday = tp->tm_mday;
186 tm.tm_mon = tp->tm_mon;
187 tm.tm_year = tp->tm_year;
189 switch (sscanf(dp, "%d.%d.%d", &d, &m, &y)) {
203 fprintf(stderr, "Mktime: %d %d %s\n",
204 (int)mktime(&tm), (int)t, asctime(&tm));
206 return (mktime(&tm));
210 * Possible date formats include any combination of:
211 * 3-charmonth (January, Jan, Jan)
212 * 3-charweekday (Friday, Monday, mon.)
213 * numeric month or day (1, 2, 04)
215 * Any character may separate them, or they may not be separated. Any line,
216 * following a line that is matched, that starts with "whitespace", is shown
217 * along with the matched line.
220 isnow(char *endp, int *monthp, int *dayp, int *varp)
222 int day, flags, month = 0, v1, v2;
228 * Monthname: Jan .. Dec
236 /* read first field */
237 /* didn't recognize anything, skip it */
238 if (!(v1 = getfield(endp, &endp, &flags)))
241 /* Easter or Easter depending days */
242 if (flags & F_EASTER)
243 day = v1 - 1; /* days since January 1 [0-365] */
246 * 1. {Weekday,Day} XYZ ...
250 else if (flags & F_ISDAY || v1 > 12) {
252 /* found a day; day: 1-31 or weekday: 1-7 */
255 /* {Day,Weekday} {Month,Monthname} ... */
256 /* if no recognizable month, assume just a day alone
257 * in other words, find month or use current month */
258 if (!(month = getfield(endp, &endp, &flags)))
259 month = tp->tm_mon + 1;
262 /* 2. {Monthname} XYZ ... */
263 else if (flags & F_ISMONTH) {
266 /* Monthname {day,weekday} */
267 /* if no recognizable day, assume the first day in month */
268 if (!(day = getfield(endp, &endp, &flags)))
274 v2 = getfield(endp, &endp, &flags);
277 * {Day} {Monthname} ...
280 if (flags & F_ISMONTH) {
286 /* {Month} {Weekday,Day} ... */
288 /* F_ISDAY set, v2 > 12, or no way to tell */
290 /* if no recognizable day, assume the first */
296 /* convert Weekday into *next* Day,
297 * e.g.: 'Sunday' -> 22
300 if (flags & F_ISDAY) {
302 fprintf(stderr, "\nday: %d %s month %d\n", day, endp, month);
306 /* variable weekday, SundayLast, MondayFirst ... */
307 if (day < 0 || day >= 10) {
309 /* negative offset; last, -4 .. -1 */
311 v1 = day / 10 - 1; /* offset -4 ... -1 */
312 day = 10 + (day % 10); /* day 1 ... 7 */
316 (((day - 1) - tp->tm_wday + 7) % 7);
318 /* (month length - day) / 7 + 1 */
319 if (cumdays[month + 1] - cumdays[month] >= v2
320 && ((int)((cumdays[month + 1] -
321 cumdays[month] - v2) / 7) + 1) == -v1)
322 day = v2; /* bingo ! */
324 /* set to yesterday */
326 day = tp->tm_mday - 1;
332 /* first, second ... +1 ... +5 */
334 /* offset: +1 (first Sunday) ... */
340 (((day - 1) - tp->tm_wday + 7) % 7);
342 /* Hurrah! matched */
343 if (((v2 - 1 + 7) / 7) == v1 )
347 /* set to yesterday */
348 day = tp->tm_mday - 1;
355 day = tp->tm_mday + (((day - 1) - tp->tm_wday + 7) % 7);
360 if (!(flags & F_EASTER)) {
361 if (day + cumdays[month] > cumdays[month + 1]) {
362 /* off end of month, adjust */
363 day -= (cumdays[month + 1] - cumdays[month]);
370 day = cumdays[month] + day;
372 for (v1 = 0; day > cumdays[v1]; v1++)
375 *dayp = day - cumdays[v1 - 1];
380 fprintf(stderr, "day2: day %d(%d-%d) yday %d\n",
381 *dayp, day, cumdays[month], tp->tm_yday);
384 /* When days before or days after is specified */
385 /* no year rollover */
386 if (day >= tp->tm_yday - f_dayBefore &&
387 day <= tp->tm_yday + f_dayAfter)
391 if (tp->tm_yday + f_dayAfter >= yrdays) {
392 int end = tp->tm_yday + f_dayAfter - yrdays;
398 if (tp->tm_yday - f_dayBefore < 0) {
399 int before = yrdays + (tp->tm_yday - f_dayBefore);
414 for (n = fnmonths; n->name; ++n)
415 if (!strncasecmp(s, n->name, n->len))
416 return ((n - fnmonths) + 1);
417 for (n = nmonths; n->name; ++n)
418 if (!strncasecmp(s, n->name, n->len))
419 return ((n - nmonths) + 1);
420 for (p = months; *p; ++p)
421 if (!strncasecmp(s, *p, 3))
422 return ((p - months) + 1);
433 for (n = fndays; n->name; ++n)
434 if (!strncasecmp(s, n->name, n->len))
435 return ((n - fndays) + 1);
436 for (n = ndays; n->name; ++n)
437 if (!strncasecmp(s, n->name, n->len))
438 return ((n - ndays) + 1);
439 for (p = days; *p; ++p)
440 if (!strncasecmp(s, *p, 3))
441 return ((p - days) + 1);
445 /* return offset for variable weekdays
446 * -1 -> last weekday in month
447 * +1 -> first weekday in month
457 /* Sun+1 or Wednesday-2
460 /* fprintf(stderr, "x: %s %s %d\n", s, s + offs - 2, offs); */
461 switch (*(s + offs - 2)) {
463 return (-(atoi(s + offs - 1)));
465 return (atoi(s + offs - 1));
469 * some aliases: last, first, second, third, fourth
473 if (offs > 4 && !strcasecmp(s + offs - 4, "last"))
475 else if (offs > 5 && !strcasecmp(s + offs - 5, "first"))
477 else if (offs > 6 && !strcasecmp(s + offs - 6, "second"))
479 else if (offs > 5 && !strcasecmp(s + offs - 5, "third"))
481 else if (offs > 6 && !strcasecmp(s + offs - 6, "fourth"))
484 /* no offset detected */