diff options
| -rw-r--r-- | libc/misc/time/time.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/libc/misc/time/time.c b/libc/misc/time/time.c index 8e2ebf12e..534a7aa9a 100644 --- a/libc/misc/time/time.c +++ b/libc/misc/time/time.c @@ -671,7 +671,7 @@ static int tm_isdst(register const struct tm *__restrict ptm, isleap = __isleap(i); --i; day0 = (1 - + i /* Normal years increment 1 wday. */ + + i /* Normal years increment 1 wday. */ + (i/4) - (i/100) + (i/400) ) % 7; @@ -684,20 +684,22 @@ static int tm_isdst(register const struct tm *__restrict ptm, } } else if (r->rule_type == 'M') { /* Find 0-based day number for 1st of the month. */ - day = 31*r->month - day_cor[r->month -1]; + day = 31 * r->month - day_cor[r->month - 1]; if (isleap && (day >= 59)) { ++day; } - monlen = 31 + day_cor[r->month -1] - day_cor[r->month]; + monlen = 31 + day_cor[r->month - 1] - day_cor[r->month]; if (isleap && (r->month == 2)) { ++monlen; } - /* Wweekday (0 is Sunday) of 1st of the month + /* Weekday (0 is Sunday) of 1st of the month * is (day0 + day) % 7. */ - if ((mday = r->day - ((day0 + day) % 7)) >= 0) { - mday -= 7; /* Back up into prev month since r->week>0. */ + mday = r->day - ((day0 + day) % 7); + if (mday >= 0) { + mday -= 7; /* Back up into prev month since r->week > 0. */ } - if ((mday += 7 * r->week) >= monlen) { + mday += 7 * r->week; + if (mday >= monlen) { mday -= 7; } /* So, 0-based day number is... */ |