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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1996, 1997, 1998
* Sleepycat Software. All rights reserved.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)bt_conv.c 10.6 (Sleepycat) 4/10/98";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#endif
#include "db_int.h"
#include "db_page.h"
#include "db_swap.h"
#include "btree.h"
/*
* __bam_pgin --
* Convert host-specific page layout from the host-independent format
* stored on disk.
*
* PUBLIC: int __bam_pgin __P((db_pgno_t, void *, DBT *));
*/
int
__bam_pgin(pg, pp, cookie)
db_pgno_t pg;
void *pp;
DBT *cookie;
{
DB_PGINFO *pginfo;
pginfo = (DB_PGINFO *)cookie->data;
if (!pginfo->needswap)
return (0);
return (pg == PGNO_METADATA ?
__bam_mswap(pp) : __db_pgin(pg, pginfo->db_pagesize, pp));
}
/*
* __bam_pgout --
* Convert host-specific page layout to the host-independent format
* stored on disk.
*
* PUBLIC: int __bam_pgout __P((db_pgno_t, void *, DBT *));
*/
int
__bam_pgout(pg, pp, cookie)
db_pgno_t pg;
void *pp;
DBT *cookie;
{
DB_PGINFO *pginfo;
pginfo = (DB_PGINFO *)cookie->data;
if (!pginfo->needswap)
return (0);
return (pg == PGNO_METADATA ?
__bam_mswap(pp) : __db_pgout(pg, pginfo->db_pagesize, pp));
}
/*
* __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;
p = (u_int8_t *)pg;
/* Swap the meta-data information. */
SWAP32(p); /* lsn.file */
SWAP32(p); /* lsn.offset */
SWAP32(p); /* pgno */
SWAP32(p); /* magic */
SWAP32(p); /* version */
SWAP32(p); /* pagesize */
SWAP32(p); /* maxkey */
SWAP32(p); /* minkey */
SWAP32(p); /* free */
SWAP32(p); /* flags */
/* Swap the statistics. */
p = (u_int8_t *)&((BTMETA *)pg)->stat;
SWAP32(p); /* bt_freed */
SWAP32(p); /* bt_pfxsaved */
SWAP32(p); /* bt_split */
SWAP32(p); /* bt_rootsplit */
SWAP32(p); /* bt_fastsplit */
SWAP32(p); /* bt_added */
SWAP32(p); /* bt_deleted */
SWAP32(p); /* bt_get */
SWAP32(p); /* bt_cache_hit */
SWAP32(p); /* bt_cache_miss */
return (0);
}
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