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Test timezone

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This commit is contained in:
Victor Zverovich
2025-04-06 10:18:11 -07:00
parent 64db979e38
commit da776c9a66
3 changed files with 10 additions and 123 deletions
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24
include/fmt/chrono.h
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@@ -1268,28 +1268,8 @@ class tm_writer {
write_utc_offset(tm.tm_gmtoff, ns);
}
template <typename T, FMT_ENABLE_IF(!has_member_data_tm_gmtoff<T>::value)>
void format_utc_offset_impl(const T& tm, numeric_system ns) {
#if defined(_WIN32) && defined(_UCRT)
tzset_once();
long offset = 0;
_get_timezone(&offset);
if (tm.tm_isdst) {
long dstbias = 0;
_get_dstbias(&dstbias);
offset += dstbias;
}
write_utc_offset(-offset, ns);
#else
if (ns == numeric_system::standard) return format_localized('z');
// Extract timezone offset from timezone conversion functions.
std::tm gtm = tm;
std::time_t gt = std::mktime(&gtm);
std::tm ltm = gmtime(gt);
std::time_t lt = std::mktime(&ltm);
long long offset = gt - lt;
write_utc_offset(offset, ns);
#endif
void format_utc_offset_impl(const T&, numeric_system ns) {
write_utc_offset(0, ns);
}
template <typename T, FMT_ENABLE_IF(has_member_data_tm_zone<T>::value)>