Method storeToPage

src/jrd/blb.cpp:2993–3038

Used by DPM_store_blob

// Used by DPM_store_blob
void blb::storeToPage(USHORT* length, Firebird::Array<UCHAR>& buffer, const UCHAR** data, void* stack)
{
	if (blb_level == 0)
	{
		*length = blb_clump_size - blb_space_remaining;

		if (!hasBuffer())
		{
			if (blb_temp_size > 0)
			{
				blb_transaction->getBlobSpace()->read(
					blb_temp_offset, buffer.getBuffer(blb_temp_size), blb_temp_size);
				*data = buffer.begin();
			}
			else
			{
				fb_assert(*length == 0);
				*data = NULL;
			}
		}
		else
			*data = getBuffer();

		if (*data)
			*data = (UCHAR*) ((blob_page*) *data)->blp_page;
	}
	else
	{
		// CVC: Sorry, but I couldn't use PageStack in blb.h without bringing several headers,
		// so I resorted to void* for the param declaration.
		PageStack& stack2 = *static_cast<PageStack*>(stack);
		*length = static_cast<USHORT>(blb_pages->count() * sizeof(ULONG));
		*data = (UCHAR*) blb_pages->begin();

		// Figure out precedence pages, if any
		// hvlad: no need to maintain precedence for temporary data
		if (!PageSpace::isTemporary(blb_pg_space_id))
		{
			vcl::const_iterator ptr, end;
			for (ptr = blb_pages->begin(), end = blb_pages->end(); ptr < end; ++ptr)
			{
				stack2.push(PageNumber(blb_pg_space_id, *ptr));
			}
		}
	}
}

void blb::BLB_cancel()
{