OSCurrentTimeZone

Function : Time

OSCurrentTimeZone - Get current time zone and daylight saving state.

#include <ostime.h>
void LNPUBLIC OSCurrentTimeZone(

    int far *retZone,
    int far *retDST);

Description :

This function gets the current time zone and daylight savings time state. It is a more convenient method than OSGetIntlSettings, but both functions return the same values for time zone and daylight savings time state. A NULL may be used for either argument if only one value is desired.

Parameters :

Output : (routine) - None.

retZone - The address of an integer (int) in which the time zone offset from Greenwich Mean Time is returned. If NULL is specified, this value is not returned. The value will be either an integer in the range -12 to +12, or 4 decimal digits. The 4-digit format is used for time zones that have a fraction of an hour in the difference. In this case, the high-order digits represent the number of minutes (either 30 or 45). For example, the timezone for Iran is GMT - 3 1/2 hours; this will be stored as -3003 (30 minutes and 03 hours). The time zone acronyms associated with the offsets are:

-12 ZE12 Twelve Hours East of GMT -4512 ZE12C 12 3/4 Hours East of GMT -11 ZE11 Eleven Hours East of GMT -3011 ZE10B 10 1/2 Hours East of GMT -10 EAT Eastern Autstralia Time -9 CAT Central Autstralia Time -3009 ZE9B 9 1/2 Hours East of GMT -8 WAT Western Autstralia Time -7 ZE7 Seven Hours East of GMT -6 ZE6 Six Hours East of GMT -3006 ZE6B 6 1/2 Hours East of GMT -5 ZE5 Five Hours East of GMT -4505 ZE5C 5 3/4 Hours East of GMT -3005 ZE5B 5 1/2 Hours East of GMT -4 ZE4 Four Hours East of GMT -3004 ZE4B 4 1/2 Hours East of GMT -3 ZE3 Three Hours East of GMT -3003 ZE3B 3 1/2 Hours East of GMT -2 ZE2 Two Hours East of GMT -1 CET Central European Time 0 GMT Greenwich Mean Time +1 ZW1 One Hour West of GMT +2 ZW2 Two Hours West of GMT +3 ZW3 Three Hours West of GMT +3003 NST Newfoundland +4 AST Atlantic Standard Time +5 EST Eastern Standard Time +6 CST Central Standard Time +7 MST Mountain Standard Time +8 PST Pacific Standard Time +9 YST Yukon Standard Time +3009 ZW9B 9 1/2 Hours West of GMT +10 HST Hawaiin Standard Time +11 BST Bering Standard Time +12 ZW12 Twelve Hours West of GMT

retDST - The address of an integer (int) in which the daylight savings time (DST) value for the current time zone is returned. 1 = YES and 0 = NO or it's not observed in this time zone. Example: 0 for Eastern Standard Time (EST) or 1 for Eastern Daylight Time (EDT). If NULL is specified, this value is not returned.

Sample Usage :

   OSCurrentTimeZone(&zone_num, &ifdst);