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/*
IXPostingCursor.h
Copyright 1991,NeXT Computer,Inc.
*/
#import "IXBTreeCursor.h"
/* This class implements an inversion cursor. It manages the values, as well */
/* as the keys, stored in the BTree. The values are lists of weighted handles. */
/* A handle is an arbitrary identifier. The weight is an arbitrary unsigned */
/* integer value that could represent term weighting for text retrieval, or a */
/* hint for fast secondary key access.*/
/* The handles for a given key are represented internally as sixteen bit */
/* quantities until the first handle is seen that requires more than sixteen */
/* bits; at that point, all of the handles for the key are represented */
/* internally as thirty two bit quantities. The weights for a given key are */
/* omitted until a non zero weight is seen; at that point, all of the handles */
/* are weighted using sixteen or thirty two bits, accordingly. When the length */
/* of the list surpasses four blocks, it is represented internally as a BTree.*/
#ifdef NX_COMPILER_RELEASE_3_0
@interface IXPostingCursor: IXBTreeCursor <IXPostingExchange, IXPostingOperations>
#else
@interface IXPostingCursor: IXBTreeCursor
#endif
{
IXPosting *_thisPosting;
struct PostingArray *_cursorValue;
unsigned _cursorLength;
IXBTreeCursor *_valueCursor;
}
@end
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.