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// store.h --
// $Id$
// This is part of Metakit, see http://www.equi4.com/metakit/
/** @file
* Definition of auxiliary storage management classes
*/
#ifndef __STORE_H__
#define __STORE_H__
/////////////////////////////////////////////////////////////////////////////
class c4_Dependencies
{
c4_PtrArray _refs;
public:
c4_Dependencies ();
~c4_Dependencies ();
void Add(c4_Sequence* seq_);
bool Remove(c4_Sequence* seq_);
friend class c4_Notifier;
};
/////////////////////////////////////////////////////////////////////////////
class c4_Notifier
{
c4_Sequence* _origin;
c4_Notifier* _chain;
c4_Notifier* _next;
public:
enum { kNone, kSetAt, kInsertAt, kRemoveAt, kMove, kSet, kLimit };
c4_Notifier (c4_Sequence* origin_);
~c4_Notifier ();
bool HasDependents() const;
void StartSetAt(int index_, c4_Cursor& cursor_);
void StartInsertAt(int index_, c4_Cursor& cursor_, int count_);
void StartRemoveAt(int index_, int count_);
void StartMove(int from_, int to_);
void StartSet(int index_, int propId_, const c4_Bytes& buf_);
int _type;
int _index;
int _propId;
int _count;
c4_Cursor* _cursor;
const c4_Bytes* _bytes;
private:
void Notify();
};
/////////////////////////////////////////////////////////////////////////////
class c4_DerivedSeq : public c4_Sequence
{
protected:
c4_Sequence& _seq;
protected:
c4_DerivedSeq (c4_Sequence& seq_);
virtual ~c4_DerivedSeq ();
public:
virtual int RemapIndex(int, const c4_Sequence*) const;
virtual int NumRows() const;
virtual void SetNumRows(int size_);
virtual int NumHandlers() const;
virtual c4_Handler& NthHandler(int) const;
virtual const c4_Sequence* HandlerContext(int) const;
virtual int AddHandler(c4_Handler*);
virtual c4_Handler* CreateHandler(const c4_Property&);
virtual c4_Notifier* PreChange(c4_Notifier& nf_);
};
/////////////////////////////////////////////////////////////////////////////
class c4_StreamStrategy : public c4_Strategy
{
c4_Stream* _stream;
t4_byte* _buffer;
t4_i32 _buflen;
t4_i32 _position;
public:
c4_StreamStrategy (t4_i32 buflen_);
c4_StreamStrategy (c4_Stream* stream_);
virtual ~c4_StreamStrategy ();
virtual bool IsValid() const;
virtual int DataRead(t4_i32 pos_, void* buffer_, int length_);
virtual void DataWrite(t4_i32 pos_, const void* buffer_, int length_);
virtual t4_i32 FileSize();
};
/////////////////////////////////////////////////////////////////////////////
#if q4_INLINE
#include "store.inl"
#endif
/////////////////////////////////////////////////////////////////////////////
#endif
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