mirror of
https://github.com/MariaDB/server.git
synced 2025-01-21 22:34:18 +01:00
115 lines
2.4 KiB
C
115 lines
2.4 KiB
C
/*-
|
|
* See the file LICENSE for redistribution information.
|
|
*
|
|
* Copyright (c) 1996-2005
|
|
* Sleepycat Software. All rights reserved.
|
|
*
|
|
* $Id: hash_conv.c,v 12.1 2005/06/16 20:22:50 bostic Exp $
|
|
*/
|
|
|
|
#include "db_config.h"
|
|
|
|
#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/hash.h"
|
|
|
|
/*
|
|
* __ham_pgin --
|
|
* Convert host-specific page layout from the host-independent format
|
|
* stored on disk.
|
|
*
|
|
* PUBLIC: int __ham_pgin __P((DB_ENV *, DB *, db_pgno_t, void *, DBT *));
|
|
*/
|
|
int
|
|
__ham_pgin(dbenv, dummydbp, pg, pp, cookie)
|
|
DB_ENV *dbenv;
|
|
DB *dummydbp;
|
|
db_pgno_t pg;
|
|
void *pp;
|
|
DBT *cookie;
|
|
{
|
|
DB_PGINFO *pginfo;
|
|
PAGE *h;
|
|
|
|
h = pp;
|
|
pginfo = (DB_PGINFO *)cookie->data;
|
|
|
|
/*
|
|
* The hash access method does blind reads of pages, causing them
|
|
* to be created. If the type field isn't set it's one of them,
|
|
* initialize the rest of the page and return.
|
|
*/
|
|
if (h->type != P_HASHMETA && h->pgno == PGNO_INVALID) {
|
|
P_INIT(pp, (db_indx_t)pginfo->db_pagesize,
|
|
pg, PGNO_INVALID, PGNO_INVALID, 0, P_HASH);
|
|
return (0);
|
|
}
|
|
|
|
if (!F_ISSET(pginfo, DB_AM_SWAP))
|
|
return (0);
|
|
|
|
return (h->type == P_HASHMETA ? __ham_mswap(pp) :
|
|
__db_byteswap(dbenv, dummydbp, pg, pp, pginfo->db_pagesize, 1));
|
|
}
|
|
|
|
/*
|
|
* __ham_pgout --
|
|
* Convert host-specific page layout to the host-independent format
|
|
* stored on disk.
|
|
*
|
|
* PUBLIC: int __ham_pgout __P((DB_ENV *, DB *, db_pgno_t, void *, DBT *));
|
|
*/
|
|
int
|
|
__ham_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 (h->type == P_HASHMETA ? __ham_mswap(pp) :
|
|
__db_byteswap(dbenv, dummydbp, pg, pp, pginfo->db_pagesize, 0));
|
|
}
|
|
|
|
/*
|
|
* __ham_mswap --
|
|
* Swap the bytes on the hash metadata page.
|
|
*
|
|
* PUBLIC: int __ham_mswap __P((void *));
|
|
*/
|
|
int
|
|
__ham_mswap(pg)
|
|
void *pg;
|
|
{
|
|
u_int8_t *p;
|
|
int i;
|
|
|
|
__db_metaswap(pg);
|
|
|
|
p = (u_int8_t *)pg + sizeof(DBMETA);
|
|
|
|
SWAP32(p); /* max_bucket */
|
|
SWAP32(p); /* high_mask */
|
|
SWAP32(p); /* low_mask */
|
|
SWAP32(p); /* ffactor */
|
|
SWAP32(p); /* nelem */
|
|
SWAP32(p); /* h_charkey */
|
|
for (i = 0; i < NCACHED; ++i)
|
|
SWAP32(p); /* spares */
|
|
p += 59 * sizeof(u_int32_t); /* unused */
|
|
SWAP32(p); /* crypto_magic */
|
|
return (0);
|
|
}
|