84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
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/*++
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Copyright (c) 1991-1993 Microsoft Corporation
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Module Name:
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TimeZone.c
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Abstract:
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This file just contains NetpLocalTimeZoneOffset(). (It is the only
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NetLib time function used by SRVSVC.DLL at this time, and ChuckL wants
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to keep that DLL as small as possible.)
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Author:
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JR (John Rogers, JohnRo@Microsoft) 20-Aug-1992
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Environment:
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Interface is portable to any flat, 32-bit environment.
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Uses Win32 typedefs.
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Requires ANSI C extensions: slash-slash comments, long external names.
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Revision History:
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20-Aug-1992 JohnRo
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RAID 2920: Support UTC timezone in net code.
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01-Oct-1992 JohnRo
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RAID 3556: Added NetpSystemTimeToGmtTime() for DosPrint APIs.
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15-Apr-1993 Danl
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Fixed NetpLocalTimeZoneOffset so that it uses the windows calls and
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obtains the correct bias.
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14-Jun-1993 JohnRo
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RAID 13080: Allow repl between different timezones.
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Also, DanL asked me to remove printf() call.
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18-Jun-1993 JohnRo
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RAID 13594: Extracted NetpLocalTimeZoneOffset() so srvsvc.dll doesn't
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get too big.
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Use NetpKdPrint() where possible.
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--*/
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// These must be included first:
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#include <windows.h>
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// These may be included in any order:
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#include <netdebug.h> // NetpAssert(), NetpKdPrint(), FORMAT_ equates.
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#include <prefix.h> // PREFIX_ equates.
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#include <timelib.h> // My prototypes.
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LONG // Number of seconds from UTC. Positive values for west of Greenwich,
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// negative values for east of Greenwich.
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NetpLocalTimeZoneOffset(
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VOID
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)
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{
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TIME_ZONE_INFORMATION tzInfo;
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LONG bias;
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switch (GetTimeZoneInformation(&tzInfo)) {
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case TIME_ZONE_ID_DAYLIGHT:
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bias = tzInfo.Bias + tzInfo.DaylightBias;
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break;
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case TIME_ZONE_ID_STANDARD:
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bias = tzInfo.Bias + tzInfo.StandardBias;
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break;
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case TIME_ZONE_ID_UNKNOWN:
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bias = tzInfo.Bias;
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break;
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default:
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NetpKdPrint(( PREFIX_NETLIB
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"NetpLocalTimeZoneOffset: GetTimeZoneInformation failed.\n" ));
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return(0);
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}
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bias *= 60;
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return(bias);
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} // NetpLocalTimeZoneOffset
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