49 lines
1.4 KiB
Factor
49 lines
1.4 KiB
Factor
USING: alien alien.c-types kernel math
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windows windows.kernel32 calendar namespaces ;
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IN: calendar.windows
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TUPLE: windows-calendar ;
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T{ windows-calendar } calendar-impl set-global
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M: windows-calendar gmt-offset ( -- float )
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"TIME_ZONE_INFORMATION" <c-object>
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[ GetTimeZoneInformation win32-error=0/f ] keep
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[ TIME_ZONE_INFORMATION-Bias ] keep
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TIME_ZONE_INFORMATION-DaylightBias + 60 /f neg ;
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: >64bit ( lo hi -- n )
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32 shift bitor ;
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: windows-1601 ( -- timestamp )
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1601 1 1 0 0 0 0 <timestamp> ;
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: FILETIME>windows-time ( FILETIME -- n )
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[ FILETIME-dwLowDateTime ] keep
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FILETIME-dwHighDateTime >64bit ;
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: windows-time>timestamp ( n -- timestamp )
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10000000 /i seconds windows-1601 swap +dt ;
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: windows-time ( -- n )
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"FILETIME" <c-object> [ GetSystemTimeAsFileTime ] keep
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FILETIME>windows-time ;
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: timestamp>windows-time ( timestamp -- n )
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#! 64bit number representing # of nanoseconds since Jan 1, 1601 (UTC)
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>gmt windows-1601 timestamp- >bignum 10000000 * ;
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: windows-time>FILETIME ( n -- FILETIME )
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"FILETIME" <c-object>
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[
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[ >r HEX: ffffffff bitand r> set-FILETIME-dwLowDateTime ] 2keep
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>r -32 shift r> set-FILETIME-dwHighDateTime
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] keep ;
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: timestamp>FILETIME ( timestamp -- FILETIME/f )
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[ >gmt timestamp>windows-time windows-time>FILETIME ] [ f ] if* ;
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: FILETIME>timestamp ( FILETIME -- timestamp/f )
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FILETIME>windows-time windows-time>timestamp ;
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