qam_upgrade.c

/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 1996-2005
 *      Sleepycat Software.  All rights reserved.
 *
 * $Id: qam_upgrade.c,v 12.1 2005/06/16 20:23:33 bostic Exp $
 */

#include "db_config.h"

#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>

#include <string.h>
#endif

#include "db_int.h"
#include "dbinc/db_upgrade.h"
#include "dbinc/db_page.h"
#include "dbinc/qam.h"

/*
 * __qam_31_qammeta --
 *      Upgrade the database from version 1 to version 2.
 *
 * PUBLIC: int __qam_31_qammeta __P((DB *, char *, u_int8_t *));
 */
int
__qam_31_qammeta(dbp, real_name, buf)
        DB *dbp;
        char *real_name;
        u_int8_t *buf;
{
        QMETA31 *newmeta;
        QMETA30 *oldmeta;

        COMPQUIET(dbp, NULL);
        COMPQUIET(real_name, NULL);

        newmeta = (QMETA31 *)buf;
        oldmeta = (QMETA30 *)buf;

        /*
         * Copy the fields to their new locations.
         * They may overlap so start at the bottom and use memmove().
         */
        newmeta->rec_page = oldmeta->rec_page;
        newmeta->re_pad = oldmeta->re_pad;
        newmeta->re_len = oldmeta->re_len;
        newmeta->cur_recno = oldmeta->cur_recno;
        newmeta->first_recno = oldmeta->first_recno;
        newmeta->start = oldmeta->start;
        memmove(newmeta->dbmeta.uid,
            oldmeta->dbmeta.uid, sizeof(oldmeta->dbmeta.uid));
        newmeta->dbmeta.flags = oldmeta->dbmeta.flags;
        newmeta->dbmeta.record_count = 0;
        newmeta->dbmeta.key_count = 0;
        ZERO_LSN(newmeta->dbmeta.unused3);

        /* Update the version. */
        newmeta->dbmeta.version = 2;

        return (0);
}

/*
 * __qam_32_qammeta --
 *      Upgrade the database from version 2 to version 3.
 *
 * PUBLIC: int __qam_32_qammeta __P((DB *, char *, u_int8_t *));
 */
int
__qam_32_qammeta(dbp, real_name, buf)
        DB *dbp;
        char *real_name;
        u_int8_t *buf;
{
        QMETA32 *newmeta;
        QMETA31 *oldmeta;

        COMPQUIET(dbp, NULL);
        COMPQUIET(real_name, NULL);

        newmeta = (QMETA32 *)buf;
        oldmeta = (QMETA31 *)buf;

        /*
         * Copy the fields to their new locations.
         * We are dropping the first field so move
         * from the top.
         */
        newmeta->first_recno = oldmeta->first_recno;
        newmeta->cur_recno = oldmeta->cur_recno;
        newmeta->re_len = oldmeta->re_len;
        newmeta->re_pad = oldmeta->re_pad;
        newmeta->rec_page = oldmeta->rec_page;
        newmeta->page_ext = 0;
        /* cur_recno now points to the first free slot. */
        newmeta->cur_recno++;
        if (newmeta->first_recno == 0)
                newmeta->first_recno = 1;

        /* Update the version. */
        newmeta->dbmeta.version = 3;

        return (0);
}

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