int
compareItemPointers(ItemPointer a, ItemPointer b)
{
if (GinItemPointerGetBlockNumber(a) == GinItemPointerGetBlockNumber(b))
{
if (GinItemPointerGetOffsetNumber(a) == GinItemPointerGetOffsetNumber(b))
return 0;
return (GinItemPointerGetOffsetNumber(a) > GinItemPointerGetOffsetNumber(b)) ? 1 : -1;
}
return (GinItemPointerGetBlockNumber(a) > GinItemPointerGetBlockNumber(b)) ? 1 : -1;
}
static inline uint64
itemptr_to_uint64(const ItemPointer iptr)
{
uint64 val;
Assert(ItemPointerIsValid(iptr));
Assert(GinItemPointerGetOffsetNumber(iptr) < (1 << MaxHeapTuplesPerPageBits));
val = GinItemPointerGetBlockNumber(iptr);
val <<= MaxHeapTuplesPerPageBits;
val |= GinItemPointerGetOffsetNumber(iptr);
return val;
}
int
ginCompareItemPointers(ItemPointer a, ItemPointer b)
{
BlockNumber ba = GinItemPointerGetBlockNumber(a);
BlockNumber bb = GinItemPointerGetBlockNumber(b);
if (ba == bb)
{
OffsetNumber oa = GinItemPointerGetOffsetNumber(a);
OffsetNumber ob = GinItemPointerGetOffsetNumber(b);
if (oa == ob)
return 0;
return (oa > ob) ? 1 : -1;
}
return (ba > bb) ? 1 : -1;
}