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/*-------------------------------------------------------------------------
*
* itempos.h
* Standard POSTGRES buffer page long item subposition definitions.
*
*
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/storage/itempos.h,v 1.20 2004/12/31 22:03:42 pgsql Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef ITEMPOS_H
#define ITEMPOS_H
#include "storage/buf.h"
#include "storage/itemid.h"
typedef struct ItemSubpositionData
{
Buffer op_db;
ItemId op_lpp;
char *op_cp; /* XXX */
uint32 op_len;
} ItemSubpositionData;
typedef ItemSubpositionData *ItemSubposition;
/*
* PNOBREAK(OBJP, LEN)
* struct objpos *OBJP;
* unsigned LEN;
*/
#define PNOBREAK(OBJP, LEN) ((OBJP)->op_len >= LEN)
/*
* PSKIP(OBJP, LEN)
* struct objpos *OBJP;
* unsigned LEN;
*/
#define PSKIP(OBJP, LEN)\
do { (OBJP)->op_cp += (LEN); (OBJP)->op_len -= (LEN); } while (0)
#endif /* ITEMPOS_H */
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