/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 1996, 2012 Oracle and/or its affiliates.  All rights reserved.
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 * $Id$
 */

#include "db_config.h"

#include "db_int.h"
#include "dbinc/db_page.h"
#include "dbinc/db_swap.h"
#include "dbinc/btree.h"

/*
 * __bam_pgin --
 *	Convert host-specific page layout from the host-independent format
 *	stored on disk.
 *
 * PUBLIC: int __bam_pgin __P((DB *, db_pgno_t, void *, DBT *));
 */
int
__bam_pgin(dbp, pg, pp, cookie)
	DB *dbp;
	db_pgno_t pg;
	void *pp;
	DBT *cookie;
{
	DB_PGINFO *pginfo;
	PAGE *h;

	pginfo = (DB_PGINFO *)cookie->data;
	if (!F_ISSET(pginfo, DB_AM_SWAP))
		return (0);

	h = pp;
	return (TYPE(h) == P_BTREEMETA ?  __bam_mswap(dbp->env, pp) :
	    __db_byteswap(dbp, pg, pp, pginfo->db_pagesize, 1));
}

/*
 * __bam_pgout --
 *	Convert host-specific page layout to the host-independent format
 *	stored on disk.
 *
 * PUBLIC: int __bam_pgout __P((DB *, db_pgno_t, void *, DBT *));
 */
int
__bam_pgout(dbp, pg, pp, cookie)
	DB *dbp;
	db_pgno_t pg;
	void *pp;
	DBT *cookie;
{
	DB_PGINFO *pginfo;
	PAGE *h;

	pginfo = (DB_PGINFO *)cookie->data;
	if (!F_ISSET(pginfo, DB_AM_SWAP))
		return (0);

	h = pp;
	return (TYPE(h) == P_BTREEMETA ?  __bam_mswap(dbp->env, pp) :
	    __db_byteswap(dbp, pg, pp, pginfo->db_pagesize, 0));
}

/*
 * __bam_mswap --
 *	Swap the bytes on the btree metadata page.
 *
 * PUBLIC: int __bam_mswap __P((ENV *, PAGE *));
 */
int
__bam_mswap(env, pg)
	ENV *env;
	PAGE *pg;
{
	u_int8_t *p;

	COMPQUIET(env, NULL);

	__db_metaswap(pg);
	p = (u_int8_t *)pg + sizeof(DBMETA);

	p += sizeof(u_int32_t);	/* unused */
	SWAP32(p);		/* minkey */
	SWAP32(p);		/* re_len */
	SWAP32(p);		/* re_pad */
	SWAP32(p);		/* root */
	p += 92 * sizeof(u_int32_t); /* unused */
	SWAP32(p);		/* crypto_magic */

	return (0);
}