Method readJumpNode

src/jrd/btn.cpp:303–342

UCHAR* IndexJumpNode::readJumpNode(UCHAR* pagePointer)
{
/**************************************
 *
 *	r e a d J u m p N o d e
 *
 **************************************
 *
 * Functional description
 *	Read a jump node from the page by the
 *  given pagePointer and the return the
 *  remaining position after the read.
 *
 **************************************/
	nodePointer = pagePointer;

	// Get prefix
	UCHAR tmp = *pagePointer++;
	prefix = (tmp & 0x7F);
	if (tmp & 0x80)
	{
		tmp = *pagePointer++;
		prefix |= (tmp & 0x7F) << 7; // We get 14 bits at this point
	}

	// Get length
	tmp = *pagePointer++;
	length = (tmp & 0x7F);
	if (tmp & 0x80)
	{
		tmp = *pagePointer++;
		length |= (tmp & 0x7F) << 7; // We get 14 bits at this point
	}

	offset = get_short(pagePointer);
	pagePointer += sizeof(USHORT);
	data = pagePointer;
	pagePointer += length;
	return pagePointer;
}


UCHAR* IndexJumpNode::writeJumpNode(UCHAR* pagePointer)