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User's Choice Windows CD (CMS Software)(1993).iso
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iv26_w30.zip
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INTERVIE
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GRAPHIC
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PERSISTE.H
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C/C++ Source or Header
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1992-01-10
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3KB
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83 lines
/*
* Copyright (c) 1987, 1988, 1989 Stanford University
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Stanford not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. Stanford makes no representations about
* the suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* STANFORD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
* IN NO EVENT SHALL STANFORD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Interface to Persistent and related base classes.
*/
#ifndef persistent_h
#define persistent_h
#include <InterViews/defs.h>
#include <InterViews/Graphic/classes.h>
#define INVALIDUID 1
/* INVALIDUID & OBJMANUID must be consecutive uids */
#define OBJMANUID 3
typedef unsigned long UID;
class ListObject;
class ObjectMan;
class PFile;
class Persistent;
extern ObjectMan* TheManager; /* the well-known global object manager */
class Persistent { /* basic (persistent) Persistent */
friend class Ref;
friend class ObjectMan;
public:
Persistent();
virtual ~Persistent();
virtual Persistent* GetCluster();
/*
* returns head of cluster. If GetCluster is redefined to return
* nil, then the object is assumed to be within the "current"
* cluster, i.e., it is a part of whatever cluster is currently
* being written out or read in. If the object is Saved explicitly,
* a warning is issued and the object is NOT saved.
*/
virtual boolean Save();
virtual boolean IsDirty();
virtual void Touch();
virtual void Clean();
virtual ClassId GetClassId();
virtual boolean IsA(ClassId);
protected:
virtual UID getUID();
void Warning(const char*);
void Panic(const char*);
void Fatal(const char*);
virtual boolean write(PFile*);
virtual boolean read(PFile*);
virtual boolean writeObjects(PFile*);
virtual boolean readObjects(PFile*);
virtual boolean initialize();
};
#endif