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Diffstat (limited to 'misc_cmds/calendar/day.c')
| -rw-r--r-- | misc_cmds/calendar/day.c | 498 |
1 files changed, 498 insertions, 0 deletions
diff --git a/misc_cmds/calendar/day.c b/misc_cmds/calendar/day.c new file mode 100644 index 0000000..f41fc2d --- /dev/null +++ b/misc_cmds/calendar/day.c @@ -0,0 +1,498 @@ +/* + * Copyright (c) 1989, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD: src/usr.bin/calendar/day.c,v 1.27 2007/06/09 05:54:13 grog Exp $"); + +#include <sys/types.h> +#include <sys/uio.h> +#include <ctype.h> +#include <err.h> +#include <locale.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> + +#include "pathnames.h" +#include "calendar.h" + +struct tm *tp; +static const struct tm tm0; +int *cumdays, yrdays; +char dayname[10]; + + +/* 1-based month, 0-based days, cumulative */ +int daytab[][14] = { + { 0, -1, 30, 58, 89, 119, 150, 180, 211, 242, 272, 303, 333, 364 }, + { 0, -1, 30, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 }, +}; + +static char const *days[] = { + "sun", "mon", "tue", "wed", "thu", "fri", "sat", NULL, +}; + +static const char *months[] = { + "jan", "feb", "mar", "apr", "may", "jun", + "jul", "aug", "sep", "oct", "nov", "dec", NULL, +}; + +static struct fixs fndays[8]; /* full national days names */ +static struct fixs ndays[8]; /* short national days names */ + +static struct fixs fnmonths[13]; /* full national months names */ +static struct fixs nmonths[13]; /* short national month names */ + + +void +setnnames(void) +{ + char buf[80]; + int i, l; + struct tm tm; + + for (i = 0; i < 7; i++) { + tm.tm_wday = i; + strftime(buf, sizeof(buf), "%a", &tm); + for (l = strlen(buf); + l > 0 && isspace((unsigned char)buf[l - 1]); + l--) + ; + buf[l] = '\0'; + if (ndays[i].name != NULL) + free(ndays[i].name); + if ((ndays[i].name = strdup(buf)) == NULL) + errx(1, "cannot allocate memory"); + ndays[i].len = strlen(buf); + + strftime(buf, sizeof(buf), "%A", &tm); + for (l = strlen(buf); + l > 0 && isspace((unsigned char)buf[l - 1]); + l--) + ; + buf[l] = '\0'; + if (fndays[i].name != NULL) + free(fndays[i].name); + if ((fndays[i].name = strdup(buf)) == NULL) + errx(1, "cannot allocate memory"); + fndays[i].len = strlen(buf); + } + + for (i = 0; i < 12; i++) { + tm.tm_mon = i; + strftime(buf, sizeof(buf), "%b", &tm); + for (l = strlen(buf); + l > 0 && isspace((unsigned char)buf[l - 1]); + l--) + ; + buf[l] = '\0'; + if (nmonths[i].name != NULL) + free(nmonths[i].name); + if ((nmonths[i].name = strdup(buf)) == NULL) + errx(1, "cannot allocate memory"); + nmonths[i].len = strlen(buf); + + strftime(buf, sizeof(buf), "%B", &tm); + for (l = strlen(buf); + l > 0 && isspace((unsigned char)buf[l - 1]); + l--) + ; + buf[l] = '\0'; + if (fnmonths[i].name != NULL) + free(fnmonths[i].name); + if ((fnmonths[i].name = strdup(buf)) == NULL) + errx(1, "cannot allocate memory"); + fnmonths[i].len = strlen(buf); + } +} + +void +settime(time_t now) +{ + char *oldl, *lbufp; + + tp = localtime(&now); + if ( isleap(tp->tm_year + 1900) ) { + yrdays = 366; + cumdays = daytab[1]; + } else { + yrdays = 365; + cumdays = daytab[0]; + } + /* Friday displays Monday's events */ + /* -A n ignores weekends */ + if (f_dayAfter != 0 && Friday != -1) { + int weeks = f_dayAfter / 5; + int days = f_dayAfter % 5; + f_dayAfter += 2 * weeks; + if (days && + (tp->tm_wday <= Friday) && + (tp->tm_wday+days > Friday)) { + f_dayAfter += 2; + } + } + header[5].iov_base = dayname; + + oldl = NULL; + lbufp = setlocale(LC_TIME, NULL); + if (lbufp != NULL && (oldl = strdup(lbufp)) == NULL) + errx(1, "cannot allocate memory"); + (void) setlocale(LC_TIME, "C"); + header[5].iov_len = strftime(dayname, sizeof(dayname), "%A", tp); + (void) setlocale(LC_TIME, (oldl != NULL ? oldl : "")); + if (oldl != NULL) + free(oldl); + + setnnames(); +} + +/* convert Day[/Month][/Year] into unix time (since 1970) + * Day: two digits, Month: two digits, Year: digits + */ +time_t +Mktime (char *dp) +{ + time_t t; + int d, m, y; + struct tm tm; + + (void)time(&t); + tp = localtime(&t); + + tm = tm0; + tm.tm_mday = tp->tm_mday; + tm.tm_mon = tp->tm_mon; + tm.tm_year = tp->tm_year; + + switch (sscanf(dp, "%d.%d.%d", &d, &m, &y)) { + case 3: + if (y > 1900) + y -= 1900; + tm.tm_year = y; + /* FALLTHROUGH */ + case 2: + tm.tm_mon = m - 1; + /* FALLTHROUGH */ + case 1: + tm.tm_mday = d; + } + +#ifdef DEBUG + fprintf(stderr, "Mktime: %d %d %s\n", (int)mktime(&tm), (int)t, + asctime(&tm)); +#endif + return(mktime(&tm)); +} + +/* + * Possible date formats include any combination of: + * 3-charmonth (January, Jan, Jan) + * 3-charweekday (Friday, Monday, mon.) + * numeric month or day (1, 2, 04) + * + * Any character may separate them, or they may not be separated. Any line, + * following a line that is matched, that starts with "whitespace", is shown + * along with the matched line. + */ +int +isnow(char *endp, int *monthp, int *dayp, int *varp) +{ + int day, flags, month = 0, v1, v2; + + /* + * CONVENTION + * + * Month: 1-12 + * Monthname: Jan .. Dec + * Day: 1-31 + * Weekday: Mon-Sun + * + */ + + flags = 0; + + /* read first field */ + /* didn't recognize anything, skip it */ + if (!(v1 = getfield(endp, &endp, &flags))) + return (0); + + /* Easter or Easter depending days */ + if (flags & F_EASTER) + day = v1 - 1; /* days since January 1 [0-365] */ + + /* + * 1. {Weekday,Day} XYZ ... + * + * where Day is > 12 + */ + else if (flags & F_ISDAY || v1 > 12) { + + /* found a day; day: 1-31 or weekday: 1-7 */ + day = v1; + + /* {Day,Weekday} {Month,Monthname} ... */ + /* if no recognizable month, assume just a day alone + * in other words, find month or use current month */ + if (!(month = getfield(endp, &endp, &flags))) + month = tp->tm_mon + 1; + } + + /* 2. {Monthname} XYZ ... */ + else if (flags & F_ISMONTH) { + month = v1; + + /* Monthname {day,weekday} */ + /* if no recognizable day, assume the first day in month */ + if (!(day = getfield(endp, &endp, &flags))) + day = 1; + } + + /* Hm ... */ + else { + v2 = getfield(endp, &endp, &flags); + + /* + * {Day} {Monthname} ... + * where Day <= 12 + */ + if (flags & F_ISMONTH) { + day = v1; + month = v2; + *varp = 0; + } + + /* {Month} {Weekday,Day} ... */ + else { + /* F_ISDAY set, v2 > 12, or no way to tell */ + month = v1; + /* if no recognizable day, assume the first */ + day = v2 ? v2 : 1; + *varp = 0; + } + } + + /* convert Weekday into *next* Day, + * e.g.: 'Sunday' -> 22 + * 'SundayLast' -> ?? + */ + if (flags & F_ISDAY) { +#ifdef DEBUG + fprintf(stderr, "\nday: %d %s month %d\n", day, endp, month); +#endif + + *varp = 1; + /* variable weekday, SundayLast, MondayFirst ... */ + if (day < 0 || day >= 10) { + + /* negative offset; last, -4 .. -1 */ + if (day < 0) { + v1 = day/10 - 1; /* offset -4 ... -1 */ + day = 10 + (day % 10); /* day 1 ... 7 */ + + /* day, eg '22nd' */ + v2 = tp->tm_mday + (((day - 1) - tp->tm_wday + 7) % 7); + + /* (month length - day) / 7 + 1 */ + if (cumdays[month+1] - cumdays[month] >= v2 + && ((int)((cumdays[month+1] - + cumdays[month] - v2) / 7) + 1) == -v1) + /* bingo ! */ + day = v2; + + /* set to yesterday */ + else { + day = tp->tm_mday - 1; + if (day == 0) + return (0); + } + } + + /* first, second ... +1 ... +5 */ + else { + v1 = day/10; /* offset: +1 (first Sunday) ... */ + day = day % 10; + + /* day, eg '22th' */ + v2 = tp->tm_mday + (((day - 1) - tp->tm_wday + 7) % 7); + + /* Hurrah! matched */ + if ( ((v2 - 1 + 7) / 7) == v1 ) + day = v2; + + /* set to yesterday */ + else { + day = tp->tm_mday - 1; + if (day == 0) + return (0); + } + } + } + + /* wired */ + else { + day = tp->tm_mday + (((day - 1) - tp->tm_wday + 7) % 7); + *varp = 1; + } + } + + if (!(flags & F_EASTER)) { + if (day + cumdays[month] > cumdays[month + 1]) { /* off end of month */ + day -= (cumdays[month + 1] - cumdays[month]); /* adjust */ + if (++month > 12) /* next year */ + month = 1; + } + *monthp = month; + *dayp = day; + day = cumdays[month] + day; + } + else { + for (v1 = 0; day > cumdays[v1]; v1++) + ; + *monthp = v1 - 1; + *dayp = day - cumdays[v1 - 1]; + *varp = 1; + } + +#ifdef DEBUG + fprintf(stderr, "day2: day %d(%d-%d) yday %d\n", *dayp, day, + cumdays[month], tp->tm_yday); +#endif + + /* When days before or days after is specified */ + /* no year rollover */ + if (day >= tp->tm_yday - f_dayBefore && + day <= tp->tm_yday + f_dayAfter) + return (1); + + /* next year */ + if (tp->tm_yday + f_dayAfter >= yrdays) { + int end = tp->tm_yday + f_dayAfter - yrdays; + if (day <= end) + return (1); + } + + /* previous year */ + if (tp->tm_yday - f_dayBefore < 0) { + int before = yrdays + (tp->tm_yday - f_dayBefore ); + if (day >= before) + return (1); + } + + return (0); +} + + +int +getmonth(char *s) +{ + const char **p; + struct fixs *n; + + for (n = fnmonths; n->name; ++n) + if (!strncasecmp(s, n->name, n->len)) + return ((n - fnmonths) + 1); + for (n = nmonths; n->name; ++n) + if (!strncasecmp(s, n->name, n->len)) + return ((n - nmonths) + 1); + for (p = months; *p; ++p) + if (!strncasecmp(s, *p, 3)) + return ((p - months) + 1); + return (0); +} + + +int +getday(char *s) +{ + const char **p; + struct fixs *n; + + for (n = fndays; n->name; ++n) + if (!strncasecmp(s, n->name, n->len)) + return ((n - fndays) + 1); + for (n = ndays; n->name; ++n) + if (!strncasecmp(s, n->name, n->len)) + return ((n - ndays) + 1); + for (p = days; *p; ++p) + if (!strncasecmp(s, *p, 3)) + return ((p - days) + 1); + return (0); +} + +/* return offset for variable weekdays + * -1 -> last weekday in month + * +1 -> first weekday in month + * ... etc ... + */ +int +getdayvar(char *s) +{ + int offs; + + + offs = strlen(s); + + + /* Sun+1 or Wednesday-2 + * ^ ^ */ + + /* fprintf(stderr, "x: %s %s %d\n", s, s + offs - 2, offs); */ + switch(*(s + offs - 2)) { + case '-': + return(-(atoi(s + offs - 1))); + case '+': + return(atoi(s + offs - 1)); + } + + + /* + * some aliases: last, first, second, third, fourth + */ + + /* last */ + if (offs > 4 && !strcasecmp(s + offs - 4, "last")) + return(-1); + else if (offs > 5 && !strcasecmp(s + offs - 5, "first")) + return(+1); + else if (offs > 6 && !strcasecmp(s + offs - 6, "second")) + return(+2); + else if (offs > 5 && !strcasecmp(s + offs - 5, "third")) + return(+3); + else if (offs > 6 && !strcasecmp(s + offs - 6, "fourth")) + return(+4); + + + /* no offset detected */ + return(0); +} |