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calendar_move_*() functions modified to properly handle leap years and

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merged into calendar_move()
date_change() added
This commit is contained in:
Frederic Culot 2007-12-10 18:59:48 +00:00
parent 4227e47ae4
commit 2c4f7c9e27
1 changed files with 62 additions and 68 deletions
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130
src/calendar.c
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@ -1,4 +1,4 @@
/* $calcurse: calendar.c,v 1.12 2007/10/21 13:42:34 culot Exp $ */ /* $calcurse: calendar.c,v 1.13 2007/12/10 18:59:48 culot Exp $ */
/* /*
* Calcurse - text-based organizer * Calcurse - text-based organizer
@ -394,79 +394,73 @@ calendar_change_day(void)
return; return;
} }
/* Move to next day, next month or next year in calendar. */ /*
void * Used to change date by adding a certain amount of days or weeks.
calendar_move_right(void) * Returns 0 on success, 1 otherwise.
{ */
if ((slctd_day.dd == 31) && (slctd_day.mm == 12) && int
(slctd_day.yyyy == 2037)) date_change(struct tm *date, int delta_month, int delta_day)
return; {
else if ((slctd_day.dd == 31) && (slctd_day.mm == 12)) { struct tm t;
slctd_day.dd = 0;
slctd_day.mm = 1; t = *date;
slctd_day.yyyy++; t.tm_mon += delta_month;
} else if (slctd_day.dd == days[slctd_day.mm - 1]) { t.tm_mday += delta_day;
slctd_day.mm++;
slctd_day.dd = 1; if (mktime(&t) == -1)
} else return (1);
slctd_day.dd++; else {
*date = t;
return (0);
}
} }
/* Move to previous day, previous month or previous year in calendar. */
void void
calendar_move_left(void) calendar_move(move_t move)
{ {
if ((slctd_day.dd == 1) && (slctd_day.mm == 1) && int ret;
(slctd_day.yyyy == 1902)) struct tm t;
return;
else if ((slctd_day.dd == 1) && (slctd_day.mm == 1)) { memset(&t, 0, sizeof(struct tm));
slctd_day.dd = 32; t.tm_mday = slctd_day.dd;
slctd_day.mm = 12; t.tm_mon = slctd_day.mm - 1;
slctd_day.yyyy--; t.tm_year = slctd_day.yyyy - 1900;
} else if (slctd_day.dd == 1) {
slctd_day.dd = days[slctd_day.mm - 2];
slctd_day.mm--;
} else
slctd_day.dd--;
}
/* Move to previous week, previous month or previous year in calendar. */ switch (move) {
void case UP:
calendar_move_up(void) if ((slctd_day.dd <= 7) && (slctd_day.mm == 1) &&
{ (slctd_day.yyyy == 1902))
if ((slctd_day.dd <= 7) && (slctd_day.mm == 1) && return;
(slctd_day.yyyy == 1902)) ret = date_change(&t, 0, -WEEKINDAYS);
return; break;
else if ((slctd_day.dd <= 7) && (slctd_day.mm == 1)) { case DOWN:
slctd_day.dd = 31 - (7 - slctd_day.dd); if ((slctd_day.dd > days[slctd_day.mm - 1] - 7)
slctd_day.mm = 12; && (slctd_day.mm == 12) && (slctd_day.yyyy == 2037))
slctd_day.yyyy--; return;
} else if (slctd_day.dd <= 7) { ret = date_change(&t, 0, WEEKINDAYS);
slctd_day.dd = days[slctd_day.mm - 2] - break;
(7 - slctd_day.dd); case LEFT:
slctd_day.mm--; if ((slctd_day.dd == 1) && (slctd_day.mm == 1) &&
} else (slctd_day.yyyy == 1902))
slctd_day.dd -= 7; return;
} ret = date_change(&t, 0, -1);
break;
case RIGHT:
if ((slctd_day.dd == 31) && (slctd_day.mm == 12) &&
(slctd_day.yyyy == 2037))
return;
ret = date_change(&t, 0, 1);
break;
default:
ret = 1;
/* NOTREACHED */
}
/* Move to next week, next month or next year in calendar. */ if (ret == 0) {
void slctd_day.dd = t.tm_mday;
calendar_move_down(void) slctd_day.mm = t.tm_mon + 1;
{ slctd_day.yyyy = t.tm_year + 1900;
}
if ((slctd_day.dd > days[slctd_day.mm - 1] - 7)
&& (slctd_day.mm == 12) && (slctd_day.yyyy == 2037))
return;
else if ((slctd_day.dd > days[slctd_day.mm - 1] - 7)
&& (slctd_day.mm == 12)) {
slctd_day.dd = (7 - (31 - slctd_day.dd));
slctd_day.mm = 1;
slctd_day.yyyy++;
} else if (slctd_day.dd > days[slctd_day.mm - 1] - 7) {
slctd_day.dd = (7 - (days[slctd_day.mm - 1] - slctd_day.dd));
slctd_day.mm++;
} else
slctd_day.dd += 7;
} }
/* /*