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time/FileTime: allow negative times

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This commit is contained in:
Max Kellermann 2021-08-10 14:15:53 +02:00
parent 488afc47d4
commit 1976003e91
1 changed files with 8 additions and 2 deletions
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10
src/time/FileTime.hxx
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@ -47,10 +47,16 @@ ToUint64(FILETIME ft) noexcept
return ConstructUint64(ft.dwLowDateTime, ft.dwHighDateTime); return ConstructUint64(ft.dwLowDateTime, ft.dwHighDateTime);
} }
constexpr int_least64_t
ToInt64(FILETIME ft) noexcept
{
return ToUint64(ft);
}
constexpr time_t constexpr time_t
FileTimeToTimeT(FILETIME ft) noexcept FileTimeToTimeT(FILETIME ft) noexcept
{ {
return (ToUint64(ft) - 116444736000000000) / 10000000; return (ToInt64(ft) - 116444736000000000) / 10000000;
} }
inline std::chrono::system_clock::time_point inline std::chrono::system_clock::time_point
@ -63,7 +69,7 @@ FileTimeToChrono(FILETIME ft) noexcept
constexpr std::chrono::seconds constexpr std::chrono::seconds
DeltaFileTimeS(FILETIME a, FILETIME b) noexcept DeltaFileTimeS(FILETIME a, FILETIME b) noexcept
{ {
return std::chrono::seconds((ToUint64(a) - ToUint64(b)) / 10000000); return std::chrono::seconds((ToInt64(a) - ToInt64(b)) / 10000000);
} }
#endif #endif