C++ (Cpp) URL::GetPartialCoverage示例

void IntersectWithUnavailable(MediaByteRange& range, URL& url)
{
	if (range.IsEmpty())
		return;

	// find the first unavailable range on or after range.start
	MediaByteRange unavail;
	BOOL available = FALSE;
	OpFileLength length = 0;
	url.GetPartialCoverage(range.start, available, length, TRUE);
	if (available)
	{
		OP_ASSERT(length > 0);
		unavail.start = range.start + length;
		length = 0;
		url.GetPartialCoverage(unavail.start, available, length, TRUE);
		OP_ASSERT(!available);
	}
	else
		unavail.start = range.start;

	// length is now the number of unavailable bytes, or 0 if unknown
	if (length > 0)
		unavail.SetLength(length);

	range.IntersectWith(unavail);
}