/*
	Copyright 1999-2001, Be Incorporated.   All Rights Reserved.
	This file may be used under the terms of the Be Sample Code License.
*/
#ifndef _DOSFS_ITER_H_
#define _DOSFS_ITER_H_


#ifdef FS_SHELL
#	include "system_dependencies.h"
#else
#	include <SupportDefs.h>
#endif


struct _nspace;

/* csi keeps track of current cluster and sector info */
struct csi {
	struct _nspace *vol;
	uint32	cluster;
	uint32	sector;
};

off_t csi_to_block(struct csi *csi);
int init_csi(struct _nspace *vol, uint32 cluster, uint32 sector, struct csi *csi);
int iter_csi(struct csi *csi, int sectors);
uint8 *csi_get_block(struct csi *csi);
status_t csi_release_block(struct csi *csi);
status_t csi_make_writable(struct csi *csi);
status_t csi_read_blocks(struct csi *csi, uint8 *buffer, ssize_t len);
status_t csi_write_blocks(struct csi *csi, uint8 *buffer, ssize_t len);
status_t csi_write_block(struct csi *csi, uint8 *buffer);

/* directory entry iterator */
struct diri {
	struct csi csi;
	uint32 starting_cluster;
	uint32 current_index;
	uint8 *current_block;

	diri();
	~diri();
};

uint8 *diri_init(struct _nspace *vol, uint32 cluster, uint32 index, struct diri *diri);
uint8 *diri_current_entry(struct diri *diri);
uint8 *diri_next_entry(struct diri *diri);
uint8 *diri_rewind(struct diri *diri);
void diri_make_writable(struct diri *diri);

#endif