Function BloomPageAddItem

contrib/bloom/blutils.c:317–345

* Add new bloom tuple to the page. Returns true if new tuple was successfully * added to the page. Returns false if it doesn't fit on the page. */

 * added to the page.  Returns false if it doesn't fit on the page.
 */
bool
BloomPageAddItem(BloomState *state, Page page, BloomTuple *tuple)
{
	BloomTuple *itup;
	BloomPageOpaque opaque;
	Pointer		ptr;

	/* We shouldn't be pointed to an invalid page */
	Assert(!PageIsNew(page) && !BloomPageIsDeleted(page));

	/* Does new tuple fit on the page? */
	if (BloomPageGetFreeSpace(state, page) < state->sizeOfBloomTuple)
		return false;

	/* Copy new tuple to the end of page */
	opaque = BloomPageGetOpaque(page);
	itup = BloomPageGetTuple(state, page, opaque->maxoff + 1);
	memcpy((Pointer) itup, (Pointer) tuple, state->sizeOfBloomTuple);

	/* Adjust maxoff and pd_lower */
	opaque->maxoff++;
	ptr = (Pointer) BloomPageGetTuple(state, page, opaque->maxoff + 1);
	((PageHeader) page)->pd_lower = ptr - page;

	/* Assert we didn't overrun available space */
	Assert(((PageHeader) page)->pd_lower <= ((PageHeader) page)->pd_upper);

	return true;
}

/*
 * Allocate a new page (either by recycling, or by extending the index file)