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98 lines
1.8 KiB
C
98 lines
1.8 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1996, 1997, 1998, 1999, 2000
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* Sleepycat Software. All rights reserved.
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*/
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#include "db_config.h"
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#ifndef lint
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static const char revid[] = "$Id: bt_conv.c,v 11.6 2000/03/31 00:30:26 ubell Exp $";
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#endif /* not lint */
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#ifndef NO_SYSTEM_INCLUDES
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#include <sys/types.h>
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#endif
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#include "db_int.h"
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#include "db_page.h"
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#include "db_swap.h"
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#include "btree.h"
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/*
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* __bam_pgin --
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* Convert host-specific page layout from the host-independent format
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* stored on disk.
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*
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* PUBLIC: int __bam_pgin __P((DB_ENV *, db_pgno_t, void *, DBT *));
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*/
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int
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__bam_pgin(dbenv, pg, pp, cookie)
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DB_ENV *dbenv;
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db_pgno_t pg;
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void *pp;
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DBT *cookie;
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{
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DB_PGINFO *pginfo;
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PAGE *h;
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pginfo = (DB_PGINFO *)cookie->data;
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if (!pginfo->needswap)
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return (0);
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h = pp;
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return (TYPE(h) == P_BTREEMETA ? __bam_mswap(pp) :
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__db_byteswap(dbenv, pg, pp, pginfo->db_pagesize, 1));
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}
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/*
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* __bam_pgout --
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* Convert host-specific page layout to the host-independent format
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* stored on disk.
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*
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* PUBLIC: int __bam_pgout __P((DB_ENV *, db_pgno_t, void *, DBT *));
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*/
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int
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__bam_pgout(dbenv, pg, pp, cookie)
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DB_ENV *dbenv;
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db_pgno_t pg;
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void *pp;
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DBT *cookie;
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{
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DB_PGINFO *pginfo;
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PAGE *h;
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pginfo = (DB_PGINFO *)cookie->data;
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if (!pginfo->needswap)
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return (0);
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h = pp;
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return (TYPE(h) == P_BTREEMETA ? __bam_mswap(pp) :
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__db_byteswap(dbenv, pg, pp, pginfo->db_pagesize, 0));
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}
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/*
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* __bam_mswap --
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* Swap the bytes on the btree metadata page.
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*
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* PUBLIC: int __bam_mswap __P((PAGE *));
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*/
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int
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__bam_mswap(pg)
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PAGE *pg;
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{
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u_int8_t *p;
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__db_metaswap(pg);
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p = (u_int8_t *)pg + sizeof(DBMETA);
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SWAP32(p); /* maxkey */
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SWAP32(p); /* minkey */
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SWAP32(p); /* re_len */
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SWAP32(p); /* re_pad */
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SWAP32(p); /* root */
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return (0);
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}
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