Tools.h++ Manual

21-234 104011 Tandem Computers Incorporated
21
Enumerations enum DstRule { NoDST, NoAm, WeEu };
Used by the static member function dstRule() , described below, and by
constructors for classes derived from RWZone .
StdZone is provided to name the standard time zones. Its values are intended
to be passed to constructors of classes derived from RWZone .
Public member functions virtual int timeZoneOffset() const = 0;
Returns the number of seconds west of UTC for standard time in this zone.
The number is negative for zones east of Greenwich, England.
virtual int altZoneOffset() const = 0;
Returns the number of seconds west of UTC for daylight savings time in this
zone.
virtual RWBoolean daylightObserved() const = 0;
Returns TRUE if daylight savings time is observed for this zone.
virtual RWBoolean isDaylight(const struct tm* tspec)
const = 0 ;
Returns TRUE if the time and date represented in the struct tm argument is
in the range of daylight savings time for this zone. The elements of the
struct tm argument must all be self-consistent; in particular, the tm_wday
member must agree with the tm_year, tm_mon , and tm_day members.
enum StdZone {
NewZealand = -12, CarolineIslands, MarianaIslands,
Japan, China, Java,
Kazakh, Pakistan, CaspianSea,
Ukraine, Nile, Europe,
Greenwich, Azores, Oscar,
Greenland, Atlantic, USEastern,
USCentral, USMountain, USPacific,
Yukon, Hawaii, Bering
};