75 lines
1.8 KiB
C++
75 lines
1.8 KiB
C++
/*-------------------------------------------------------------------------
|
|
*
|
|
* FILE
|
|
* pglobject.h
|
|
*
|
|
* DESCRIPTION
|
|
* declaration of the PGlobj class.
|
|
* PGlobj encapsulates a large object interface to Postgres backend
|
|
*
|
|
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
|
|
* Portions Copyright (c) 1994, Regents of the University of California
|
|
*
|
|
*
|
|
* $Id: pglobject.h,v 1.11 2002/07/02 16:32:19 momjian Exp $
|
|
*
|
|
*-------------------------------------------------------------------------
|
|
*/
|
|
|
|
#ifndef PGLOBJECT_H
|
|
#define PGLOBJECT_H
|
|
|
|
#ifndef PGCONNECTION_H
|
|
#include "pgconnection.h"
|
|
#endif
|
|
|
|
#ifdef HAVE_NAMESPACE_STD
|
|
#define PGSTD std::
|
|
#else
|
|
#define PGSTD
|
|
#endif
|
|
|
|
|
|
// ****************************************************************
|
|
//
|
|
// PgLargeObject - a class for accessing Large Object in a database
|
|
//
|
|
// ****************************************************************
|
|
class DLLIMPORT PgLargeObject : public PgConnection
|
|
{
|
|
private:
|
|
int pgFd;
|
|
Oid pgObject;
|
|
PGSTD string loStatus;
|
|
void Init(Oid lobjId = 0);
|
|
|
|
public:
|
|
explicit PgLargeObject(const char* conninfo = 0); // use reasonable defaults and create large object
|
|
explicit PgLargeObject(Oid lobjId, const char* conninfo = 0); // use reasonable defaults and open large object
|
|
~PgLargeObject(); // close connection and clean up
|
|
|
|
void Create();
|
|
void Open();
|
|
void Close();
|
|
int Read(char* buf, int len);
|
|
int Write(const char* buf, int len);
|
|
int LSeek(int offset, int whence);
|
|
int Tell() const;
|
|
int Unlink();
|
|
Oid LOid();
|
|
Oid Import(const char* filename);
|
|
int Export(const char* filename);
|
|
PGSTD string Status() const;
|
|
|
|
private:
|
|
// We don't support copying of PgLargeObject objects,
|
|
// so make copy constructor and assignment op private.
|
|
PgLargeObject(const PgLargeObject&);
|
|
PgLargeObject& operator= (const PgLargeObject&);
|
|
};
|
|
|
|
|
|
#undef PGSTD
|
|
|
|
#endif // PGLOBJECT_H
|