set_or_throw(m_ec, ec, "last_write_time", p);
return file_time_type::min();
}
+ if (ec) ec->clear();
+ auto ts = detail::extract_mtime(st);
#ifndef _LIBCPP_HAS_NO_INT128
using IntMax = __int128_t;
-#else
- using IntMax = intmax_t;
-#endif
// FIXME: The value may not be representable as file_time_type. Fix
// file_time_type so it can represent all possible values returned by the
// filesystem. For now we do the calculation with the largest possible types
// and then truncate, this prevents signed integer overflow bugs.
- auto ts = detail::extract_mtime(st);
const auto NsDur = duration<IntMax, nano>(ts.tv_nsec) + seconds(ts.tv_sec);
if (NsDur > file_time_type::max().time_since_epoch() ||
NsDur < file_time_type::min().time_since_epoch()) {
"last_write_time", p);
return file_time_type::min();
}
- if (ec) ec->clear();
return file_time_type(duration_cast<file_time_type::duration>(NsDur));
+#else
+ // FIXME the under/overflow check done above overflows if we don't have
+ // a 128 bit integer type.
+ return file_time_type::clock::from_time_t(ts.tv_sec);
+#endif
}
void __last_write_time(const path& p, file_time_type new_time,