Tools.h++ Class Reference

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©Copyright 1996 Rogue Wave Software
RWZone
Synopsis●
Description●
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Static Public Member Functions●
Synopsis
#include <time.h>
#include <rw/zone.h>
(abstract base class)
Description
RWZone is an abstract base class. It defines an interface for time zone issues such as whether or
not daylight-saving time is in use, the names and offsets from UTC (also known as GMT) for
both standard and daylight-saving times, and the start and stop dates for daylight-saving time, if
used.
Note that because it is an abstract base class, there is no way to actually enforce these goals --
the description here is merely the model of how a class derived from RWZone should act.
Most programs interact with RWZone only by passing an RWZone reference to an RWTime or
RWDate member function that expects one.
RWZoneSimple is an implementation of the abstract RWZone interface sufficient to represent
U.S. daylight-saving time rules. Three instances of RWZoneSimple are initialized from the
global environment at program startup to represent local, standard, and universal time. They are
available via calls to the static member functions RWZone::local(), RWZone::standard(), and