ibit.h

来自「关系型数据库 Postgresql 6.5.2」· C头文件 代码 · 共 35 行

/*-------------------------------------------------------------------------
 *
 * ibit.h
 *	  POSTGRES index valid attribute bit map definitions.
 *
 *
 * Copyright (c) 1994, Regents of the University of California
 *
 * $Id: ibit.h,v 1.9.2.1 1999/07/30 18:26:59 scrappy Exp $
 *
 *-------------------------------------------------------------------------
 */
#ifndef IBIT_H
#define IBIT_H

#include "utils/memutils.h"

typedef struct IndexAttributeBitMapData
{
	char		bits[(MaxIndexAttributeNumber + MaxBitsPerByte - 1)
					 /			 MaxBitsPerByte];
} IndexAttributeBitMapData;

typedef IndexAttributeBitMapData *IndexAttributeBitMap;

#define IndexAttributeBitMapSize		sizeof(IndexAttributeBitMapData)

/*
 * IndexAttributeBitMapIsValid
 *		True iff attribute bit map is valid.
 */
#define IndexAttributeBitMapIsValid(bits) PointerIsValid(bits)

#endif	 /* IBIT_H */