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Fixed ngx_gmtime() on 32-bit platforms with 64-bit time_t.

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In ngx_gmtime(), instead of casting to ngx_uint_t we now work with
time_t directly.  This allows using dates after 2038 on 32-bit platforms
which use 64-bit time_t, notably NetBSD and OpenBSD.

As the code is not able to work with negative time_t values, argument
is now set to 0 for negative values.  As a positive side effect, this
results in Epoch being used for such values instead of a date in distant
future.
This commit is contained in:
Maxim Dounin 2017-09-13 15:52:01 +03:00
parent 1f24c8d701
commit d3f9924959
1 changed files with 10 additions and 8 deletions
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18
src/core/ngx_times.c
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@ -300,23 +300,25 @@ void
ngx_gmtime(time_t t, ngx_tm_t *tp)
{
ngx_int_t yday;
ngx_uint_t n, sec, min, hour, mday, mon, year, wday, days, leap;
ngx_uint_t sec, min, hour, mday, mon, year, wday, days, leap;
/* the calculation is valid for positive time_t only */
n = (ngx_uint_t) t;
if (t < 0) {
t = 0;
}
days = n / 86400;
days = t / 86400;
sec = t % 86400;
/* January 1, 1970 was Thursday */
wday = (4 + days) % 7;
n %= 86400;
hour = n / 3600;
n %= 3600;
min = n / 60;
sec = n % 60;
hour = sec / 3600;
sec %= 3600;
min = sec / 60;
sec %= 60;
/*
* the algorithm based on Gauss' formula,