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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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126
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
@ -394,79 +394,73 @@ calendar_change_day(void)
return;
}
/* Move to next day, next month or next year in calendar. */
void
calendar_move_right(void)
/*
* Used to change date by adding a certain amount of days or weeks.
* Returns 0 on success, 1 otherwise.
*/
int
date_change(struct tm *date, int delta_month, int delta_day)
{
if ((slctd_day.dd == 31) && (slctd_day.mm == 12) &&
(slctd_day.yyyy == 2037))
return;
else if ((slctd_day.dd == 31) && (slctd_day.mm == 12)) {
slctd_day.dd = 0;
slctd_day.mm = 1;
slctd_day.yyyy++;
} else if (slctd_day.dd == days[slctd_day.mm - 1]) {
slctd_day.mm++;
slctd_day.dd = 1;
} else
slctd_day.dd++;
struct tm t;
t = *date;
t.tm_mon += delta_month;
t.tm_mday += delta_day;
if (mktime(&t) == -1)
return (1);
else {
*date = t;
return (0);
}
}
/* Move to previous day, previous month or previous year in calendar. */
void
calendar_move_left(void)
calendar_move(move_t move)
{
if ((slctd_day.dd == 1) && (slctd_day.mm == 1) &&
(slctd_day.yyyy == 1902))
return;
else if ((slctd_day.dd == 1) && (slctd_day.mm == 1)) {
slctd_day.dd = 32;
slctd_day.mm = 12;
slctd_day.yyyy--;
} else if (slctd_day.dd == 1) {
slctd_day.dd = days[slctd_day.mm - 2];
slctd_day.mm--;
} else
slctd_day.dd--;
}
int ret;
struct tm t;
/* Move to previous week, previous month or previous year in calendar. */
void
calendar_move_up(void)
{
if ((slctd_day.dd <= 7) && (slctd_day.mm == 1) &&
(slctd_day.yyyy == 1902))
return;
else if ((slctd_day.dd <= 7) && (slctd_day.mm == 1)) {
slctd_day.dd = 31 - (7 - slctd_day.dd);
slctd_day.mm = 12;
slctd_day.yyyy--;
} else if (slctd_day.dd <= 7) {
slctd_day.dd = days[slctd_day.mm - 2] -
(7 - slctd_day.dd);
slctd_day.mm--;
} else
slctd_day.dd -= 7;
}
memset(&t, 0, sizeof(struct tm));
t.tm_mday = slctd_day.dd;
t.tm_mon = slctd_day.mm - 1;
t.tm_year = slctd_day.yyyy - 1900;
/* Move to next week, next month or next year in calendar. */
void
calendar_move_down(void)
{
switch (move) {
case UP:
if ((slctd_day.dd <= 7) && (slctd_day.mm == 1) &&
(slctd_day.yyyy == 1902))
return;
ret = date_change(&t, 0, -WEEKINDAYS);
break;
case DOWN:
if ((slctd_day.dd > days[slctd_day.mm - 1] - 7)
&& (slctd_day.mm == 12) && (slctd_day.yyyy == 2037))
return;
ret = date_change(&t, 0, WEEKINDAYS);
break;
case LEFT:
if ((slctd_day.dd == 1) && (slctd_day.mm == 1) &&
(slctd_day.yyyy == 1902))
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 */
}
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;
if (ret == 0) {
slctd_day.dd = t.tm_mday;
slctd_day.mm = t.tm_mon + 1;
slctd_day.yyyy = t.tm_year + 1900;
}
}
/*