gistdefs.h

此文件包含了在linux下实现tpr-tree索引的源代码

// -*- Mode: C++ -*-
//--------------------------------------------------------------------
//        GiSTdefs.h
//        ----------
//
//        GiST - Generalized Search Tree 
//        June 2001 release, Aalborg University
//        
//        This file is a revised version of a part of the original 
//        libGiST release (version  0.9beta1)     
//        Copyright (c) 1996, Regents of the University of California
//

#ifndef GISTDEFS_H
#define GISTDEFS_H

#include <assert.h>
#include <stdlib.h>
#include <math.h>

#ifdef PRINTING_OBJECTS
#include <iostream.h>
#endif

// A GiSTpage is a disk page number (a "pointer" to a disk page)
typedef unsigned long GiSTpage;

//------------------------------------------------
//  GiSTobjid's are used to identify objects
//  You can add new ones as you define new objects, or simply
//  make things be GISTOBJECT_CLASS if you don't want to bother.

typedef enum
{
  GISTOBJECT_CLASS,
  GIST_CLASS,
  BT_CLASS,
  RT_CLASS,
  GISTENTRY_CLASS,
  GISTNODE_CLASS,
  BTNODE_CLASS,
  BTENTRY_CLASS,
  BTKEY_CLASS,
  RTNODE_CLASS,
  RTENTRY_CLASS,
  RTKEY_CLASS,
  GISTPREDICATE_CLASS,
  BTPREDICATE_CLASS,
  RTPREDICATE_CLASS,
  GISTCURSOR_CLASS,
  GISTOBSERVER_CLASS
} GiSTobjid;

//------------------------------------------------
//  GiSTobject is the base class for all GiST classes
//  It provides identity, equality tests and display of objects

class GiSTobject
{
public:
  virtual GiSTobjid   IsA()   const { return GISTOBJECT_CLASS; }
  virtual GiSTobject *Copy()  const { return NULL; }
  virtual int   IsEqual  (const GiSTobject& obj) const { return 0; }
#ifdef PRINTING_OBJECTS
  virtual void Print(ostream& os) const { os << "No print method\n"; }
#endif
  virtual ~GiSTobject() {}
};

#ifdef PRINTING_OBJECTS
inline ostream& operator<< (ostream& os, const GiSTobject& obj) {
    obj.Print(os);
    return os;
}

inline ostream& operator<< (ostream& os, const GiSTobject *obj) {
    obj->Print(os);
    return os;
}
#endif

#endif