Method format

src/common/TimeZoneUtil.cpp:544–584

Format a time zone to string, as offset or region.

// Format a time zone to string, as offset or region.
unsigned TimeZoneUtil::format(char* buffer, size_t bufferSize, USHORT timeZone, bool fallback, SLONG offset)
{
	char* p = buffer;

	if (fallback)
	{
		if (offset == NO_OFFSET)
			p += fb_utils::snprintf(p, bufferSize - (p - buffer), "%s", GMT_FALLBACK);
		else
		{
			if (offset != 0)
				*p++ = offset < 0 ? '-' : '+';

			if (offset < 0)
				offset = -offset;

			int minutes = offset % 60;
			offset /= 60;
			p += fb_utils::snprintf(p, bufferSize - (p - buffer), "%02d:%02d", offset, minutes);
		}
	}
	else if (isOffset(timeZone))
	{
		SSHORT displacement = offsetZoneToDisplacement(timeZone);

		*p++ = displacement < 0 ? '-' : '+';

		if (displacement < 0)
			displacement = -displacement;

		p += fb_utils::snprintf(p, bufferSize - 1, "%2.2d:%2.2d", displacement / 60, displacement % 60);
	}
	else
	{
		strncpy(buffer, getDesc(timeZone)->getAsciiName(), bufferSize);

		p += strlen(buffer);
	}

	return p - buffer;
}

// Returns if the offsets are valid.
bool TimeZoneUtil::isValidOffset(int sign, unsigned tzh, unsigned tzm)