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Do not compute localtime twice

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Filip Brcic 2021-05-18 22:22:36 +02:00
parent 7a33f5e783
commit 4b9c9b97fb
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GPG Key ID: 15FB92681DE569DA
1 changed files with 3 additions and 1 deletions
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4
include/fmt/chrono.h
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@ -411,7 +411,7 @@ struct formatter<std::chrono::time_point<std::chrono::system_clock, std::chrono:
template <typename FormatContext> template <typename FormatContext>
auto format(std::chrono::time_point<std::chrono::system_clock> val, auto format(std::chrono::time_point<std::chrono::system_clock> val,
FormatContext& ctx) -> decltype(ctx.out()) { FormatContext& ctx) -> decltype(ctx.out()) {
std::tm time = localtime(val); std::tm time;
auto epoch = val.time_since_epoch(); auto epoch = val.time_since_epoch();
auto seconds = std::chrono::duration_cast<std::chrono::seconds>(epoch); auto seconds = std::chrono::duration_cast<std::chrono::seconds>(epoch);
auto subseconds = std::chrono::duration_cast<std::chrono::duration<Rep, Period>>(epoch - seconds); auto subseconds = std::chrono::duration_cast<std::chrono::duration<Rep, Period>>(epoch - seconds);
@ -419,6 +419,8 @@ struct formatter<std::chrono::time_point<std::chrono::system_clock, std::chrono:
if (subseconds < subseconds.zero()) { if (subseconds < subseconds.zero()) {
time = localtime(val - std::chrono::seconds{1}); time = localtime(val - std::chrono::seconds{1});
subseconds = std::chrono::seconds{1} + subseconds; subseconds = std::chrono::seconds{1} + subseconds;
} else {
time = localtime(val);
} }
if (subseconds.count() > 0) { if (subseconds.count() > 0) {