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WinSDK: add convenience conversions for FILETIME/time_t #23342

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Mar 17, 2019
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WinSDK: add convenience conversions for FILETIME/time_t #23342

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14 changes: 14 additions & 0 deletions stdlib/public/Windows/WinSDK.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -71,3 +71,17 @@ public let TOOLBARW_CLASSW: [WCHAR] = Array<WCHAR>("ToolbarWindow32".utf16)
public let TRACKBAR_CLASSW: [WCHAR] = Array<WCHAR>("msctls_trackbar32".utf16)
public let UPDOWN_CLASSW: [WCHAR] = Array<WCHAR>("msctls_updown32".utf16)

// Swift Convenience
public extension FILETIME {
var time_t: time_t {
let NTTime: Int64 = Int64(self.dwLowDateTime) | (Int64(self.dwHighDateTime) << 32)
return (NTTime - 116444736000000000) / 10000000
}

init(from time: time_t) {
let UNIXTime: Int64 = ((time * 10000000) + 116444736000000000)
self = FILETIME(dwLowDateTime: DWORD(UNIXTime & 0xffffffff),
dwHighDateTime: DWORD((UNIXTime >> 32) & 0xffffffff))
}
}