version 1.6, 1998/11/08 04:31:13 |
version 1.7, 1998/12/13 07:31:07 |
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#include "pathnames.h" |
#include "pathnames.h" |
#include "calendar.h" |
#include "calendar.h" |
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#define WEEKLY 1 |
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#define MONTHLY 2 |
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#define YEARLY 3 |
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struct tm *tp; |
struct tm *tp; |
int *cumdays, offset, yrdays; |
int *cumdays, offset; |
char dayname[10]; |
char dayname[10]; |
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errx(1, "cannot allocate memory"); |
errx(1, "cannot allocate memory"); |
fnmonths[i].len = strlen(buf); |
fnmonths[i].len = strlen(buf); |
} |
} |
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/* Hardwired special events */ |
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spev[0].name = strdup(EASTER); |
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spev[0].nlen = EASTERNAMELEN; |
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spev[0].getev = easter; |
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spev[1].name = strdup(PASKHA); |
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spev[1].nlen = PASKHALEN; |
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spev[1].getev = paskha; |
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for (i = 0; i < NUMEV; i++) { |
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if (spev[i].name == NULL) |
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errx(1, "cannot allocate memory"); |
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spev[i].uname = NULL; |
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} |
} |
} |
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void |
void |
settime(now) |
settime(now) |
time_t now; |
time_t *now; |
{ |
{ |
tp = localtime(&now); |
tp = localtime(now); |
if (isleap(tp->tm_year + TM_YEAR_BASE)) { |
tp->tm_sec = 0; |
yrdays = DAYSPERLYEAR; |
tp->tm_min = 0; |
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/* Avoid getting caught by a timezone shift; set time to noon */ |
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tp->tm_isdst = 0; |
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tp->tm_hour = 12; |
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*now = mktime(tp); |
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if (isleap(tp->tm_year + TM_YEAR_BASE)) |
cumdays = daytab[1]; |
cumdays = daytab[1]; |
} else { |
else |
yrdays = DAYSPERNYEAR; |
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cumdays = daytab[0]; |
cumdays = daytab[0]; |
} |
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/* Friday displays Monday's events */ |
/* Friday displays Monday's events */ |
offset = tp->tm_wday == 5 ? 3 : 1; |
offset = tp->tm_wday == 5 ? 3 : 1; |
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if (f_dayAfter) |
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offset = 0; /* Except not when range is set explicitly */ |
header[5].iov_base = dayname; |
header[5].iov_base = dayname; |
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(void) setlocale(LC_TIME, "C"); |
(void) setlocale(LC_TIME, "C"); |
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/* Year */ |
/* Year */ |
if (len >= 6) { |
if (len >= 6) { |
*(date + len - 4) = '\0'; |
*(date + len - 4) = '\0'; |
tm.tm_year = atoi(date); |
tm.tm_year = atoi(date); |
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/* tm_year up TM_YEAR_BASE ... */ |
/* tm_year up TM_YEAR_BASE ... */ |
if (tm.tm_year < 69) /* Y2K */ |
if (tm.tm_year < 69) /* Y2K */ |
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isnow(endp) |
isnow(endp) |
char *endp; |
char *endp; |
{ |
{ |
int day, flags = 0, month = 0, v1, v2; |
int day = 0, flags = 0, month = 0, v1, v2, i; |
int monthp, dayp, varp; |
int monthp, dayp, varp = 0; |
struct match *matches; |
struct match *matches = NULL, *tmp, *tmp2; |
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int interval = YEARLY; /* how frequently the event repeats. */ |
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int vwd = 0; /* Variable weekday */ |
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time_t tdiff, ttmp; |
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struct tm tmtmp; |
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/* |
/* |
* CONVENTION |
* CONVENTION |
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return (NULL); |
return (NULL); |
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/* Easter or Easter depending days */ |
/* Easter or Easter depending days */ |
if (flags & F_EASTER) |
if (flags & F_SPECIAL) |
day = v1 - 1; /* days since January 1 [0-365] */ |
vwd = v1; |
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/* |
/* |
* 1. {Weekday,Day} XYZ ... |
* 1. {Weekday,Day} XYZ ... |
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*/ |
*/ |
else if (flags & F_ISDAY || v1 > 12) { |
else if (flags & F_ISDAY || v1 > 12) { |
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/* found a day; day: 1-31 or weekday: 1-7 */ |
/* found a day; day: 13-31 or weekday: 1-7 */ |
day = v1; |
day = v1; |
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/* {Day,Weekday} {Month,Monthname} ... */ |
/* {Day,Weekday} {Month,Monthname} ... */ |
/* if no recognizable month, assume just a day alone |
/* if no recognizable month, assume just a day alone -- this is |
* in other words, find month or use current month */ |
* very unlikely and can only happen after the first 12 days. |
if (!(month = getfield(endp, &endp, &flags))) |
* --find month or use current month */ |
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if (!(month = getfield(endp, &endp, &flags))) { |
month = tp->tm_mon + 1; |
month = tp->tm_mon + 1; |
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/* F_ISDAY is set only if a weekday was spelled out */ |
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/* F_ISDAY must be set if 0 < day < 8 */ |
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if ((day <= 7) && (day >= 1)) |
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interval = WEEKLY; |
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else |
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interval = MONTHLY; |
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} else if ((day <= 7) && (day >= 1)) |
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day += 10; |
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/* it's a weekday; make it the first one of the month */ |
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if (month == -1) { |
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month = tp->tm_mon + 1; |
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interval = MONTHLY; |
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} |
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if ((month > 12) || (month < 1)) |
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return (NULL); |
} |
} |
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/* 2. {Monthname} XYZ ... */ |
/* 2. {Monthname} XYZ ... */ |
else if (flags & F_ISMONTH) { |
else if (flags & F_ISMONTH) { |
month = v1; |
month = v1; |
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if (month == -1) { |
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month = tp->tm_mon + 1; |
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interval = MONTHLY; |
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} |
/* Monthname {day,weekday} */ |
/* Monthname {day,weekday} */ |
/* if no recognizable day, assume the first day in month */ |
/* if no recognizable day, assume the first day in month */ |
if (!(day = getfield(endp, &endp, &flags))) |
if (!(day = getfield(endp, &endp, &flags))) |
day = 1; |
day = 1; |
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/* If a weekday was spelled out without an ordering, |
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* assume the first of that day in the month */ |
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if ((flags & F_ISDAY) && (day >= 1) && (day <=7)) |
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day += 10; |
} |
} |
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/* Hm ... */ |
/* Hm ... */ |
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if (flags & F_ISMONTH) { |
if (flags & F_ISMONTH) { |
day = v1; |
day = v1; |
month = v2; |
month = v2; |
varp = 0; |
if (month == -1) { |
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month = tp->tm_mon + 1; |
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interval = MONTHLY; |
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} |
} |
} |
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/* {Month} {Weekday,Day} ... */ |
/* {Month} {Weekday,Day} ... */ |
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month = v1; |
month = v1; |
/* if no recognizable day, assume the first */ |
/* if no recognizable day, assume the first */ |
day = v2 ? v2 : 1; |
day = v2 ? v2 : 1; |
varp = 0; |
if ((flags & F_ISDAY) && (day >= 1) && (day <= 7)) |
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day += 10; |
} |
} |
} |
} |
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*/ |
*/ |
if (flags & F_ISDAY) { |
if (flags & F_ISDAY) { |
#if DEBUG |
#if DEBUG |
fprintf(stderr, "\nday: %d %s month %d\n", day, endp, month); |
fprintf(stderr, "\nday: %d %s month %d\n", day, endp, month); |
#endif |
#endif |
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varp = 1; |
varp = 1; |
/* variable weekday, SundayLast, MondayFirst ... */ |
/* variable weekday, SundayLast, MondayFirst ... */ |
if (day < 0 || day >= 10) { |
if (day < 0 || day >= 10) |
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vwd = day; |
/* negative offset; last, -4 .. -1 */ |
else { |
if (day < 0) { |
day = tp->tm_mday + (((day - 1) - tp->tm_wday + 7) % 7); |
v1 = day/10 - 1; /* offset -4 ... -1 */ |
interval = WEEKLY; |
day = 10 + (day % 10); /* day 1 ... 7 */ |
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/* which weekday the end of the month is (1-7) */ |
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v2 = (cumdays[month + 1] - tp->tm_yday + |
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tp->tm_wday + 371) % 7 + 1; |
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/* and subtract enough days */ |
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day = cumdays[month + 1] - cumdays[month] + |
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(v1 + 1) * 7 - (v2 - day + 7) % 7; |
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#if DEBUG |
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fprintf(stderr, "\nMonth %d ends on weekday %d\n", month, v2); |
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#endif |
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} |
} |
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} else |
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/* Check for silliness. Note we still catch Feb 29 */ |
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if (!(flags & F_SPECIAL) && |
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(day > (cumdays[month + 1] - cumdays[month]) || day < 1)) { |
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if (!((month == 2 && day == 29) || |
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(interval == MONTHLY && day <= 31))) |
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return (NULL); |
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} |
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/* first, second ... +1 ... +5 */ |
if (!(flags & F_SPECIAL)) { |
else { |
monthp = month; |
v1 = day/10; /* offset */ |
dayp = day; |
day = day % 10; |
day = cumdays[month] + day; |
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/* which weekday the first of the month is */ |
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v2 = (cumdays[month] - tp->tm_yday + |
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tp->tm_wday + 372) % 7 + 1; |
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/* and add enough days */ |
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day = 1 + (v1 - 1) * 7 + (day - v2 + 7) % 7; |
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#if DEBUG |
#if DEBUG |
fprintf(stderr, "\nMonth %d starts on weekday %d\n", month, v2); |
fprintf(stderr, "day2: day %d(%d) yday %d\n", dayp, day, tp->tm_yday); |
#endif |
#endif |
} |
/* Speed up processing for the most common situation: yearly events |
} |
* when the interval being checked is less than a month or so (this |
else |
* could be less than a year, but then we have to start worrying about |
day = tp->tm_mday + (((day - 1) - tp->tm_wday + 7) % 7); |
* leap years). Only one event can match, and it's easy to find. |
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* Note we can't check special events, because they can wander widely. |
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*/ |
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if (((v1 = offset + f_dayAfter) < 50) && (interval == YEARLY)) { |
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memcpy(&tmtmp, tp, sizeof(struct tm)); |
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tmtmp.tm_mday = dayp; |
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tmtmp.tm_mon = monthp - 1; |
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v2 = day - tp->tm_yday; |
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if ((v2 > v1) || (v2 < 0)) { |
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if ((v2 += isleap(tp->tm_year + TM_YEAR_BASE) ? 366 : 365) |
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<= v1) |
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tmtmp.tm_year++; |
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else |
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return(NULL); |
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} |
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if ((tmp = malloc(sizeof(struct match))) == NULL) |
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errx(1, "cannot allocate memory"); |
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tmp->when = f_time + v2 * SECSPERDAY; |
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(void)mktime(&tmtmp); |
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if (strftime(tmp->print_date, |
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sizeof(tmp->print_date), |
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/* "%a %b %d", &tm); Skip weekdays */ |
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"%b %d", &tmtmp) == 0) |
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tmp->print_date[sizeof(tmp->print_date) - 1] = '\0'; |
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tmp->var = varp; |
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tmp->next = NULL; |
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return(tmp); |
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} |
} |
} |
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if (!(flags & F_EASTER)) { |
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monthp = month; |
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dayp = day; |
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day = cumdays[month] + day; |
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} |
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else { |
else { |
for (v1 = 0; day > cumdays[v1]; v1++) |
varp = 1; |
; |
/* Set up v1 to the event number and ... */ |
monthp = v1 - 1; |
v1 = vwd % (NUMEV + 1) - 1; |
dayp = day - cumdays[v1 - 1]; |
vwd /= (NUMEV + 1); |
varp = 1; |
if (v1 < 0) { |
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v1 += NUMEV + 1; |
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vwd--; |
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} |
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dayp = monthp = 1; /* Why not */ |
} |
} |
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#if DEBUG |
/* Compare to past and coming instances of the event. The i == 0 part |
fprintf(stderr, "day2: day %d(%d) yday %d\n", dayp, day, tp->tm_yday); |
* of the loop corresponds to this specific instance. Note that we |
#endif |
* can leave things sort of higgledy-piggledy since a mktime() happens |
/* if today or today + offset days */ |
* on this before anything gets printed. Also note that even though |
if ((day >= tp->tm_yday - f_dayBefore && |
* we've effectively gotten rid of f_dayBefore, we still have to check |
day <= tp->tm_yday + offset + f_dayAfter) || |
* the one prior event for situations like "the 31st of every month" |
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* and "yearly" events which could happen twice in one year but not in |
/* if number of days left in this year + days to event in next year */ |
* the next */ |
(yrdays - tp->tm_yday + day <= offset + f_dayAfter || |
tmp2 = matches; |
/* a year backward, eg. 6 Jan and 10 days before -> 27. Dec */ |
for (i = -1; i < 2; i++) { |
tp->tm_yday + day - f_dayBefore < 0 |
memcpy(&tmtmp, tp, sizeof(struct tm)); |
)) { |
tmtmp.tm_mday = dayp; |
if ((matches = malloc(sizeof(struct match))) == NULL) |
tmtmp.tm_mon = month = monthp - 1; |
errx(1,"cannot allocate memory"); |
do { |
matches->month = monthp; |
v2 = 0; |
matches->day = dayp; |
switch (interval) { |
matches->var = varp; |
case WEEKLY: |
matches->year = tp->tm_year; /* XXX */ |
tmtmp.tm_mday += 7 * i; |
matches->next = NULL; |
break; |
return (matches); |
case MONTHLY: |
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month += i; |
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tmtmp.tm_mon = month; |
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switch(tmtmp.tm_mon) { |
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case -1: |
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tmtmp.tm_mon = month = 11; |
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tmtmp.tm_year--; |
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break; |
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case 12: |
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tmtmp.tm_mon = month = 0; |
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tmtmp.tm_year++; |
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break; |
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} |
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if (vwd) { |
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v1 = vwd; |
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variable_weekday(&v1, tmtmp.tm_mon + 1, |
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tmtmp.tm_year + TM_YEAR_BASE); |
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tmtmp.tm_mday = v1; |
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} else |
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tmtmp.tm_mday = dayp; |
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break; |
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case YEARLY: |
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default: |
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tmtmp.tm_year += i; |
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if (flags & F_SPECIAL) { |
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tmtmp.tm_mon = 0; /* Gee, mktime() is nice */ |
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tmtmp.tm_mday = spev[v1].getev(tmtmp.tm_year + |
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vwd + TM_YEAR_BASE); |
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} else if (vwd) { |
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v1 = vwd; |
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variable_weekday(&v1, tmtmp.tm_mon + 1, |
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tmtmp.tm_year + TM_YEAR_BASE); |
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tmtmp.tm_mday = v1; |
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} else { |
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/* Need the following to keep Feb 29 from |
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* becoming Mar 1 */ |
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tmtmp.tm_mday = dayp; |
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tmtmp.tm_mon = monthp - 1; |
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} |
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break; |
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} |
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/* How many days apart are we */ |
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if ((ttmp = mktime(&tmtmp)) == -1) |
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warnx("time out of range: %s", endp); |
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else { |
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tdiff = difftime(ttmp, f_time)/ SECSPERDAY; |
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if (tdiff <= offset + f_dayAfter) { |
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if (tdiff >= 0) { |
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if ((tmp = malloc(sizeof(struct match))) == NULL) |
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errx(1, "cannot allocate memory"); |
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tmp->when = ttmp; |
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if (strftime(tmp->print_date, |
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sizeof(tmp->print_date), |
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/* "%a %b %d", &tm); Skip weekdays */ |
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"%b %d", &tmtmp) == 0) |
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tmp->print_date[sizeof(tmp->print_date) - 1] = '\0'; |
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tmp->var = varp; |
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tmp->next = NULL; |
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if (tmp2) |
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tmp2->next = tmp; |
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else |
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matches = tmp; |
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tmp2 = tmp; |
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v2 = (i == 1) ? 1 : 0; |
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} |
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} else |
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i = 2; /* No point checking in the future */ |
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} |
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} while (v2 != 0); |
} |
} |
return (NULL); |
return (matches); |
} |
} |
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offset = strlen(s); |
offset = strlen(s); |
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/* Sun+1 or Wednesday-2 |
/* Sun+1 or Wednesday-2 |
* ^ ^ */ |
* ^ ^ */ |
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/* printf ("x: %s %s %d\n", s, s + offset - 2, offset); */ |
/* printf ("x: %s %s %d\n", s, s + offset - 2, offset); */ |
switch(*(s + offset - 2)) { |
switch(*(s + offset - 2)) { |
case '-': |
case '-': |
return(-(atoi(s + offset - 1))); |
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break; |
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case '+': |
case '+': |
return(atoi(s + offset - 1)); |
return(atoi(s + offset - 2)); |
break; |
break; |
} |
} |
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/* |
/* |
* some aliases: last, first, second, third, fourth |
* some aliases: last, first, second, third, fourth |
*/ |
*/ |
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else if (offset > 6 && !strcasecmp(s + offset - 6, "fourth")) |
else if (offset > 6 && !strcasecmp(s + offset - 6, "fourth")) |
return(+4); |
return(+4); |
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/* no offset detected */ |
/* no offset detected */ |
return(0); |
return(0); |
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} |
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int |
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foy(year) |
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int year; |
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{ |
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/* 0-6; what weekday Jan 1 is */ |
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year--; |
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return ((1 - year/100 + year/400 + (int)(365.25 * year)) % 7); |
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} |
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void |
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variable_weekday(day, month, year) |
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int *day, month, year; |
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{ |
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int v1, v2; |
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int *cumdays; |
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int day1; |
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if (isleap(year)) |
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cumdays = daytab[1]; |
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else |
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cumdays = daytab[0]; |
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day1 = foy(year); |
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/* negative offset; last, -4 .. -1 */ |
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if (*day < 0) { |
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v1 = *day/10 - 1; /* offset -4 ... -1 */ |
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*day = 10 + (*day % 10); /* day 1 ... 7 */ |
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/* which weekday the end of the month is (1-7) */ |
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v2 = (cumdays[month + 1] + day1) % 7 + 1; |
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/* and subtract enough days */ |
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*day = cumdays[month + 1] - cumdays[month] + |
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(v1 + 1) * 7 - (v2 - *day + 7) % 7; |
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#if DEBUG |
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fprintf(stderr, "\nMonth %d ends on weekday %d\n", month, v2); |
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#endif |
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} |
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/* first, second ... +1 ... +5 */ |
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else { |
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v1 = *day/10; /* offset */ |
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*day = *day % 10; |
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/* which weekday the first of the month is (1-7) */ |
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v2 = (cumdays[month] + 1 + day1) % 7 + 1; |
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/* and add enough days */ |
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*day = 1 + (v1 - 1) * 7 + (*day - v2 + 7) % 7; |
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#if DEBUG |
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fprintf(stderr, "\nMonth %d starts on weekday %d\n", month, v2); |
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#endif |
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} |
} |
} |