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/*************** FilAMap H Declares Source Code File (.H) **************/
/* Name: FILAMAP.H Version 1.2 */
/* */
/* (C) Copyright to the author Olivier BERTRAND 2005-2012 */
/* */
/* This file contains the MAP file access method classes declares. */
/***********************************************************************/
#ifndef __FILAMAP_H
#define __FILAMAP_H
#include "block.h"
#include "filamtxt.h"
typedef class MAPFAM *PMAPFAM;
/***********************************************************************/
/* This is the variable file access method using file mapping. */
/***********************************************************************/
class DllExport MAPFAM : public TXTFAM {
public:
// Constructor
MAPFAM(PDOSDEF tdp);
MAPFAM(PMAPFAM tmfp);
// Implementation
virtual AMT GetAmType(void) {return TYPE_AM_MAP;}
virtual int GetPos(void);
virtual int GetNextPos(void);
virtual PTXF Duplicate(PGLOBAL g)
{return (PTXF)new(g) MAPFAM(this);}
// Methods
virtual void Reset(void);
virtual int GetFileLength(PGLOBAL g);
virtual int Cardinality(PGLOBAL g) {return (g) ? -1 : 0;}
virtual int MaxBlkSize(PGLOBAL g, int s) {return s;}
virtual int GetRowID(void);
virtual bool RecordPos(PGLOBAL g);
virtual bool SetPos(PGLOBAL g, int recpos);
virtual int SkipRecord(PGLOBAL g, bool header);
virtual bool OpenTableFile(PGLOBAL g);
virtual bool DeferReading(void) {return false;}
virtual int ReadBuffer(PGLOBAL g);
virtual int WriteBuffer(PGLOBAL g);
virtual int DeleteRecords(PGLOBAL g, int irc);
virtual void CloseTableFile(PGLOBAL g);
virtual void Rewind(void);
protected:
// Members
char *Memory; // Pointer on file mapping view.
char *Mempos; // Position of next data to read
char *Fpos; // Position of last read record
char *Tpos; // Target Position for delete move
char *Spos; // Start position for delete move
char *Top; // Mark end of file mapping view
}; // end of class MAPFAM
/***********************************************************************/
/* This is the blocked file access method using file mapping. */
/***********************************************************************/
class DllExport MBKFAM : public MAPFAM {
public:
// Constructor
MBKFAM(PDOSDEF tdp);
MBKFAM(PMAPFAM tmfp) : MAPFAM(tmfp) {}
// Implementation
virtual PTXF Duplicate(PGLOBAL g)
{return (PTXF)new(g) MBKFAM(this);}
// Methods
virtual void Reset(void);
virtual int Cardinality(PGLOBAL g);
virtual int MaxBlkSize(PGLOBAL g, int s)
{return TXTFAM::MaxBlkSize(g, s);}
virtual int GetRowID(void);
virtual int SkipRecord(PGLOBAL g, bool header);
virtual int ReadBuffer(PGLOBAL g);
virtual void Rewind(void);
protected:
// No additional members
}; // end of class MBKFAM
/***********************************************************************/
/* This is the fixed file access method using file mapping. */
/***********************************************************************/
class DllExport MPXFAM : public MBKFAM {
public:
// Constructor
MPXFAM(PDOSDEF tdp);
MPXFAM(PMAPFAM tmfp) : MBKFAM(tmfp) {}
// Implementation
virtual int GetPos(void);
virtual PTXF Duplicate(PGLOBAL g)
{return (PTXF)new(g) MPXFAM(this);}
// Methods
virtual int Cardinality(PGLOBAL g) {return TXTFAM::Cardinality(g);}
virtual int MaxBlkSize(PGLOBAL g, int s)
{return TXTFAM::MaxBlkSize(g, s);}
virtual bool SetPos(PGLOBAL g, int recpos);
virtual bool DeferReading(void) {return false;}
virtual int ReadBuffer(PGLOBAL g);
virtual int WriteBuffer(PGLOBAL g);
protected:
// No additional members
}; // end of class MPXFAM
#endif // __FILAMAP_H
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