/* Menes Database - Database Abstraction Layer
 * Copyright (C) 2004-2005  Jay Freeman (saurik)
*/

/*
 *        Redistribution and use in source and binary
 * forms, with or without modification, are permitted
 * provided that the following conditions are met:
 *·
 * 1. Redistributions of source code must retain the
 *    above copyright notice, this list of conditions
 *    and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the
 *    above copyright notice, this list of conditions
 *    and the following disclaimer in the documentation
 *    and/or other materials provided with the
 *    distribution.
 * 3. The name of the author may not be used to endorse
 *    or promote products derived from this software
 *    without specific prior written permission.
 *·
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef MENES_DBI_PGSQL_BLOB_HPP
#define MENES_DBI_PGSQL_BLOB_HPP

#include "cxx/platform.hpp"
#include "dbi/linkage.hpp"

#ifdef MENES_PRAGMA_ONCE
#pragma once
#endif

#include "dbi/blob.hpp"
#include "ios/streams.hpp"

#include "libpq-fe.h"

namespace dbi {
namespace PgSql {

class Connection;

class BlobReader :
    public dbi::BlobReader
{
  private:
    _R<Connection> connection_;
    int fd_;

  public:
    BlobReader(const _R<Connection> &connection, ::Oid oid);
    virtual ~BlobReader();

    virtual size_t Read(char *data, size_t length);
};

class BlobWriter :
    public dbi::BlobWriter
{
  private:
    _R<Connection> connection_;
    int fd_;

  public:
    BlobWriter(const _R<Connection> &connection, ::Oid oid);
    virtual ~BlobWriter();

    virtual size_t Write(const byte_t *data, size_t length);
    virtual void Flush();
};

class Blob :
    public dbi::Blob
{
  private:
    _R<Connection> connection_;
    ::Oid oid_;

  public:
    Blob(const _R<Connection> &connection);
    Blob(const _R<Connection> &connection, ::Oid oid);

    virtual _R<dbi::BlobReader> GetReader();
    virtual _R<dbi::BlobWriter> GetWriter();

    virtual unsigned GetId() const;
};

} }

#endif//MENES_DBI_PGSQL_CONNETION_HPP