Function offsetZoneToDisplacement

src/common/TimeZoneUtil.cpp:1164–1169

Gets the displacement from a offset-based time zone id.

// Gets the displacement from a offset-based time zone id.
static inline SSHORT offsetZoneToDisplacement(USHORT timeZone)
{
	fb_assert(isOffset(timeZone));

	return (SSHORT) (int(timeZone) - ONE_DAY);
}

static inline USHORT displacementToOffsetZone(SSHORT displacement)
{