/*
 *	PROGRAM:	JRD Access Method
 *	MODULE:		ext.h
 *	DESCRIPTION:	External file access definitions
 *
 * The contents of this file are subject to the Interbase Public
 * License Version 1.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy
 * of the License at http://www.Inprise.com/IPL.html
 *
 * Software distributed under the License is distributed on an
 * "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express
 * or implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code was created by Inprise Corporation
 * and its predecessors. Portions created by Inprise Corporation are
 * Copyright (C) Inprise Corporation.
 *
 * All Rights Reserved.
 * Contributor(s): ______________________________________.
 */

#ifndef _JRD_EXT_H_
#define _JRD_EXT_H_

/* External file access block */

class ext : public pool_alloc_rpt<SCHAR, type_ext>
{
    public:
	struct fmt *ext_format;		/* External format */
	UCHAR *ext_stuff;			/* Random stuff */
	USHORT ext_flags;			/* Misc and cruddy flags */
#ifdef VMS
	int ext_ifi;				/* Internal file identifier */
	int ext_isi;				/* Internal stream (default) */
#else
	int *ext_ifi;				/* Internal file identifier */
	int *ext_isi;				/* Internal stream (default) */
#endif
	USHORT ext_record_length;	/* Record length */
	USHORT ext_file_type;		/* File type */
	USHORT ext_index_count;		/* Number of indices */
	UCHAR *ext_indices;			/* Index descriptions */
	UCHAR ext_dbkey[8];			/* DBKEY */
	UCHAR ext_filename[1];
};
typedef ext *EXT;

#define EXT_opened	1			/* File has been opened */
#define EXT_eof		2			/* Positioned at EOF */
#define EXT_readonly	4		/* File could only be opened for read */

typedef struct irsb_ext {
	USHORT irsb_flags;			/* flags (a whole word!) */
	UCHAR irsb_ext_dbkey[8];	/* DBKEY */
} *IRSB_EXT;

/* Overload record parameter block with external file stuff */

#define rpb_ext_pos	rpb_page
#define rpb_ext_isi	rpb_f_page
#define rpb_ext_dbkey	rpb_b_page

#endif /* _JRD_EXT_H_ */