diff options
Diffstat (limited to 'time/offtime.c')
| -rw-r--r-- | time/offtime.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/time/offtime.c b/time/offtime.c index a4b59ed209..52e40703c8 100644 --- a/time/offtime.c +++ b/time/offtime.c @@ -26,8 +26,9 @@ extern const unsigned short int __mon_yday[2][13]; /* Compute the `struct tm' representation of *T, offset OFFSET seconds east of UTC, - and store year, yday, mon, mday, wday, hour, min, sec into *TP. */ -void + and store year, yday, mon, mday, wday, hour, min, sec into *TP. + Return nonzero if successful. */ +int __offtime (t, offset, tp) const time_t *t; long int offset; @@ -59,7 +60,8 @@ __offtime (t, offset, tp) tp->tm_wday += 7; y = 1970; -#define LEAPS_THRU_END_OF(y) ((y) / 4 - (y) / 100 + (y) / 400) +#define DIV(a, b) ((a) / (b) - ((a) % (b) < 0)) +#define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400)) while (days < 0 || days >= (__isleap (y) ? 366 : 365)) { @@ -73,6 +75,8 @@ __offtime (t, offset, tp) y = yg; } tp->tm_year = y - 1900; + if (tp->tm_year != y - 1900) + return 0; tp->tm_yday = days; ip = __mon_yday[__isleap(y)]; for (y = 11; days < (long int) ip[y]; --y) @@ -80,4 +84,5 @@ __offtime (t, offset, tp) days -= ip[y]; tp->tm_mon = y; tp->tm_mday = days + 1; + return 1; } |