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Differential D20631 Diff 58599 contrib/tzcode/stdtime/localtime.c

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contrib/tzcode/stdtime/localtime.c

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{ {
gmtime_key_error = _pthread_key_create(&gmtime_key, free); gmtime_key_error = _pthread_key_create(&gmtime_key, free);
} }
struct tm * struct tm *
gmtime(const time_t *const timep) gmtime(const time_t *const timep)
{ {
struct tm *p_tm; struct tm *p_tm, *res;
if (__isthreaded != 0) { if (__isthreaded != 0) {
_pthread_once(&gmtime_once, gmtime_key_init); _pthread_once(&gmtime_once, gmtime_key_init);
if (gmtime_key_error != 0) { if (gmtime_key_error != 0) {
errno = gmtime_key_error; errno = gmtime_key_error;
return(NULL); return(NULL);
} }
/* /*
* Changed to follow POSIX.1 threads standard, which * Changed to follow POSIX.1 threads standard, which
* is what BSD currently has. * is what BSD currently has.
*/ */
if ((p_tm = _pthread_getspecific(gmtime_key)) == NULL) { if ((p_tm = _pthread_getspecific(gmtime_key)) == NULL) {
if ((p_tm = (struct tm *)malloc(sizeof(struct tm))) if ((p_tm = (struct tm *)malloc(sizeof(struct tm)))
== NULL) { == NULL) {
return(NULL); return(NULL);
} }
_pthread_setspecific(gmtime_key, p_tm); _pthread_setspecific(gmtime_key, p_tm);
} }
gmtsub(timep, 0L, p_tm); res = gmtsub(timep, 0L, p_tm);
return(p_tm); return (res);
} }
else { else {
gmtsub(timep, 0L, &tm); res = gmtsub(timep, 0L, &tm);
return(&tm); return (res);
} }
} }
/* /*
* Re-entrant version of gmtime. * Re-entrant version of gmtime.
*/ */
struct tm * struct tm *
▲ Show 20 Lines • Show All 76 Lines • ▼ Show 20 Lines#endif /* State Farm */
while (tdays < 0 || tdays >= year_lengths[isleap(y)]) { while (tdays < 0 || tdays >= year_lengths[isleap(y)]) {
int newy; int newy;
register time_t tdelta; register time_t tdelta;
register int idelta; register int idelta;
register int leapdays; register int leapdays;
tdelta = tdays / DAYSPERLYEAR; tdelta = tdays / DAYSPERLYEAR;
idelta = tdelta; idelta = tdelta;
if (tdelta - idelta >= 1 || idelta - tdelta >= 1) if (tdelta - idelta >= 1 || idelta - tdelta >= 1) {
errno = EOVERFLOW;
return NULL; return NULL;
}
if (idelta == 0) if (idelta == 0)
idelta = (tdays < 0) ? -1 : 1; idelta = (tdays < 0) ? -1 : 1;
newy = y; newy = y;
if (increment_overflow(&newy, idelta)) if (increment_overflow(&newy, idelta)) {
errno = EOVERFLOW;
return NULL; return NULL;
}
leapdays = leaps_thru_end_of(newy - 1) - leapdays = leaps_thru_end_of(newy - 1) -
leaps_thru_end_of(y - 1); leaps_thru_end_of(y - 1);
tdays -= ((time_t) newy - y) * DAYSPERNYEAR; tdays -= ((time_t) newy - y) * DAYSPERNYEAR;
tdays -= leapdays; tdays -= leapdays;
y = newy; y = newy;
} }
{ {
register long seconds; register long seconds;
Show All 11 Lines while (rem < 0) {
rem += SECSPERDAY; rem += SECSPERDAY;
--idays; --idays;
} }
while (rem >= SECSPERDAY) { while (rem >= SECSPERDAY) {
rem -= SECSPERDAY; rem -= SECSPERDAY;
++idays; ++idays;
} }
while (idays < 0) { while (idays < 0) {
if (increment_overflow(&y, -1)) if (increment_overflow(&y, -1)) {
errno = EOVERFLOW;
return NULL; return NULL;
}
idays += year_lengths[isleap(y)]; idays += year_lengths[isleap(y)];
} }
while (idays >= year_lengths[isleap(y)]) { while (idays >= year_lengths[isleap(y)]) {
idays -= year_lengths[isleap(y)]; idays -= year_lengths[isleap(y)];
if (increment_overflow(&y, 1)) if (increment_overflow(&y, 1)) {
errno = EOVERFLOW;
return NULL; return NULL;
} }
}
tmp->tm_year = y; tmp->tm_year = y;
if (increment_overflow(&tmp->tm_year, -TM_YEAR_BASE)) if (increment_overflow(&tmp->tm_year, -TM_YEAR_BASE)) {
errno = EOVERFLOW;
return NULL; return NULL;
}
tmp->tm_yday = idays; tmp->tm_yday = idays;
/* /*
** The "extra" mods below avoid overflow problems. ** The "extra" mods below avoid overflow problems.
*/ */
tmp->tm_wday = EPOCH_WDAY + tmp->tm_wday = EPOCH_WDAY +
((y - EPOCH_YEAR) % DAYSPERWEEK) * ((y - EPOCH_YEAR) % DAYSPERWEEK) *
(DAYSPERNYEAR % DAYSPERWEEK) + (DAYSPERNYEAR % DAYSPERWEEK) +
leaps_thru_end_of(y - 1) - leaps_thru_end_of(y - 1) -
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