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/*-------------------------------------------------------------------------
*
* FILE
* pglobject.h
*
* DESCRIPTION
* declaration of the PGlobj class.
* PGlobj encapsulates a large object interface to Postgres backend
*
* Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/libpq++/Attic/pglobject.h,v 1.1 1997/02/13 10:00:35 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef PGLOBJ_H
#define PGLOBJ_H
#include "pgconnection.h"
// buffer size
#define BUFSIZE 1024
// ****************************************************************
//
// PgLargeObject - a class for accessing Large Object in a database
//
// ****************************************************************
class PgLargeObject : public PgConnection {
private:
int pgFd;
Oid pgObject;
public:
PgLargeObject(const char* dbName = 0); // use reasonable defaults and create large object
PgLargeObject(Oid lobjId, const char* dbName = 0); // use reasonable defaults and open large object
PgLargeObject(const PgEnv& env, const char* dbName); // create large object
PgLargeObject(const PgEnv& env, const char* dbName, Oid lobjId); // open large object
~PgLargeObject(); // close connection and clean up
void Create();
void Open();
void Close()
{ if (pgFd >= 0) lo_close(pgConn, pgFd); }
int Read(char* buf, int len)
{ return lo_read(pgConn, pgFd, buf, len); }
int Write(const char* buf, int len)
{ return lo_write(pgConn, pgFd, (char*)buf, len); }
int LSeek(int offset, int whence)
{ return lo_lseek(pgConn, pgFd, offset, whence); }
int Tell()
{ return lo_tell(pgConn, pgFd); }
int Unlink();
Oid Import(const char* filename) { return pgObject = lo_import(pgConn, (char*)filename); }
int Export(const char* filename) { return lo_export(pgConn, pgObject, (char*)filename); }
private:
void Init(Oid lobjId = 0);
};
#endif // PGLOBJ_H
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