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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug libstdc++/114244] Need to use round when parsing fractional seconds Date: Thu, 07 Mar 2024 00:37:24 +0000 [thread overview] Message-ID: <bug-114244-4-QNt9NgIogT@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-114244-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114244 --- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Jonathan Wakely from comment #1) > Yup, the seconds part "00.002" is parsed using std::numpunct (in order to Oops, std::num_get obviously. > handle the locale's decimal point) and then converted to milliseconds using > duration_cast: > > auto& __ng = use_facet<num_get<_CharT>>(__loc); > long double __val; > ios_base::iostate __err2{}; > __ng.get(__buf, {}, __buf, __err2, __val); > if (__is_failed(__err2)) [[unlikely]] > __err |= __err2; > else > { > duration<long double> __fs(__val); > __s = duration_cast<_Duration>(__fs); > } As an unrelated optimization, when the locale is "C" we could use std::from_chars or std::stod instead of std::num_get.
next prev parent reply other threads:[~2024-03-07 0:37 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-03-05 17:23 [Bug libstdc++/114244] New: " howard.hinnant at gmail dot com 2024-03-05 20:49 ` [Bug libstdc++/114244] " redi at gcc dot gnu.org 2024-03-07 0:30 ` redi at gcc dot gnu.org 2024-03-07 0:32 ` redi at gcc dot gnu.org 2024-03-07 0:37 ` redi at gcc dot gnu.org [this message] 2024-03-07 1:01 ` howard.hinnant at gmail dot com 2024-03-07 1:21 ` redi at gcc dot gnu.org 2024-03-07 23:45 ` cvs-commit at gcc dot gnu.org 2024-03-07 23:46 ` redi at gcc dot gnu.org
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