/*

 * Amanda, The Advanced Maryland Automatic Network Disk Archiver

 * Copyright (c) 2009-2012 Zmanda, Inc.  All Rights Reserved.

 * Copyright (c) 2013-2016 Carbonite, Inc.  All Rights Reserved.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY

 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * for more details.

 *

 * You should have received a copy of the GNU General Public License along

 * with this program; if not, write to the Free Software Foundation, Inc.,

 * 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA

 *

 * Contact information: Carbonite Inc., 756 N Pastoria Ave

 * Sunnyvale, CA 94085, or: http://www.zmanda.com

 */

#ifndef XFER_DEST_TAPER_H

#define XFER_DEST_TAPER_H

#include "amxfer.h"

#include "device.h"

/*

 * class declaration for XferDestTaper (an abstract base class)

 */

GType xfer_dest_taper_get_type(void);

#define XFER_DEST_TAPER_TYPE (xfer_dest_taper_get_type())

#define XFER_DEST_TAPER(obj) G_TYPE_CHECK_INSTANCE_CAST((obj), xfer_dest_taper_get_type(), XferDestTaper)

#define XFER_DEST_TAPER_CONST(obj) G_TYPE_CHECK_INSTANCE_CAST((obj), xfer_dest_taper_get_type(), XferDestTaper const)

#define XFER_DEST_TAPER_CLASS(klass) G_TYPE_CHECK_CLASS_CAST((klass), xfer_dest_taper_get_type(), XferDestTaperClass)

#define IS_XFER_DEST_TAPER(obj) G_TYPE_CHECK_INSTANCE_TYPE((obj), xfer_dest_taper_get_type ())

#define XFER_DEST_TAPER_GET_CLASS(obj) G_TYPE_INSTANCE_GET_CLASS((obj), xfer_dest_taper_get_type(), XferDestTaperClass)

typedef struct XferDestTaper_ {

    XferElement __parent__;

} XferDestTaper;

typedef struct {

    XferElementClass __parent__;

    /* see xfer-device.h for details of these methods */

    void (*start_part)(XferDestTaper *self, gboolean retry_part, dumpfile_t *header);

    void (*use_device)(XferDestTaper *self, Device *device);

    void (*cache_inform)(XferDestTaper *self, const char *filename, off_t offset,

			 off_t length);

    void (*new_space_available)(XferDestTaper *self, int made_space);

    guint64 (*get_part_bytes_written)(XferDestTaper *self);

} XferDestTaperClass;

/* Start writing the next part to the given device.  The part will be written

 * to the device given to use_device, which should be open and properly positioned.

 * It should not have a file open yet.

 *

 * @param self: the XferDestTaper object

 * @param retry_part: retry the previous (incomplete) part if true

 * @param header: part header

 */

void xfer_dest_taper_start_part(

    XferElement *self,

    gboolean retry_part,

    dumpfile_t *header);

/* Prepare to write subsequent parts to the given device.  The device must

 * not be started yet.  It is not necessary to call this method for the first

 * device used in a transfer.

 *

 * @param self: the XferDestTaper object

 * @param device: the device

 */

void xfer_dest_taper_use_device(

    XferElement *self,

    Device *device);

/* Add a slice of data to the cache for the element.  This is used by the taper

 * when reading from holding disk, to tell the element which holding disk files

 * contain the data that might be needed when rewinding, but can be used in any

 * situation where the part data is already on-disk.  The order of calls to this

 * function dictates the order in whch the files will be read, and no gaps or

 * overlaps are supported.  Note, too, that this must be called *before* any of

 * the data in the new file is sent into the transfer.

 *

 * @param self: the XferDestTaper object

 * @param filename: the fully qualified filename of the cache file

 * @param offset: offset into the file at which data begins

 * @param length: length of data in file

 */

void xfer_dest_taper_cache_inform(

    XferElement *self,

    const char *filename,

    off_t offset,

    off_t length);

void xfer_dest_taper_new_space_available(

    XferElement *self,

    int          made_space);

/* Return the number of bytes written for the current part.

 *

 * @param self: the XferDestTaper object

 */

guint64 xfer_dest_taper_get_part_bytes_written(

    XferElement *self);

#endif