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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1996-2002
* Sleepycat Software. All rights reserved.
*/
#include "db_config.h"
#ifndef lint
static const char revid[] = "$Id: bt_conv.c,v 1.1.1.1 2003/11/20 22:13:03 toshok Exp $";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#endif
#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_ENV *, DB *, db_pgno_t, void *, DBT *));
*/
int
__bam_pgin(dbenv, dummydbp, pg, pp, cookie)
DB_ENV *dbenv;
DB *dummydbp;
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(pp) :
__db_byteswap(dbenv, dummydbp, 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_ENV *, DB *, db_pgno_t, void *, DBT *));
*/
int
__bam_pgout(dbenv, dummydbp, pg, pp, cookie)
DB_ENV *dbenv;
DB *dummydbp;
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(pp) :
__db_byteswap(dbenv, dummydbp, pg, pp, pginfo->db_pagesize, 0));
}
/*
* __bam_mswap --
* Swap the bytes on the btree metadata page.
*
* PUBLIC: int __bam_mswap __P((PAGE *));
*/
int
__bam_mswap(pg)
PAGE *pg;
{
u_int8_t *p;
__db_metaswap(pg);
p = (u_int8_t *)pg + sizeof(DBMETA);
SWAP32(p); /* maxkey */
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);
}
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