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/*-------------------------------------------------------------------------
*
* 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 1.10 2002/06/20 20:29:54 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
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