/*      $OpenBSD: ext2fs_bswap.c,v 1.8 2014/07/31 17:37:52 pelikan Exp $        */
/*      $NetBSD: ext2fs_bswap.c,v 1.6 2000/07/24 00:23:10 mycroft Exp $ */

/*
 * Copyright (c) 1997 Manuel Bouyer.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#include <sys/types.h>
#if defined(_KERNEL)
#include <sys/systm.h>
#endif

#include <ufs/ext2fs/ext2fs.h>
#include <ufs/ext2fs/ext2fs_dinode.h>

#if !defined(_KERNEL)
#include <string.h>
#endif

/* These functions are only needed if native byte order is not big endian */
#if BYTE_ORDER == BIG_ENDIAN
void
e2fs_sb_bswap(struct ext2fs *old, struct ext2fs *new)
{
        /* preserve unused fields */
        memcpy(new, old, sizeof(struct ext2fs));
        new->e2fs_icount        =       swap32(old->e2fs_icount);
        new->e2fs_bcount        =       swap32(old->e2fs_bcount);
        new->e2fs_rbcount       =       swap32(old->e2fs_rbcount);
        new->e2fs_fbcount       =       swap32(old->e2fs_fbcount);
        new->e2fs_ficount       =       swap32(old->e2fs_ficount);
        new->e2fs_first_dblock  =       swap32(old->e2fs_first_dblock);
        new->e2fs_log_bsize     =       swap32(old->e2fs_log_bsize);
        new->e2fs_log_fsize     =       swap32(old->e2fs_log_fsize);
        new->e2fs_bpg           =       swap32(old->e2fs_bpg);
        new->e2fs_fpg           =       swap32(old->e2fs_fpg);
        new->e2fs_ipg           =       swap32(old->e2fs_ipg);
        new->e2fs_mtime         =       swap32(old->e2fs_mtime);
        new->e2fs_wtime         =       swap32(old->e2fs_wtime);
        new->e2fs_mnt_count     =       swap16(old->e2fs_mnt_count);
        new->e2fs_max_mnt_count =       swap16(old->e2fs_max_mnt_count);
        new->e2fs_magic         =       swap16(old->e2fs_magic);
        new->e2fs_state         =       swap16(old->e2fs_state);
        new->e2fs_beh           =       swap16(old->e2fs_beh);
        new->e2fs_minrev        =       swap16(old->e2fs_minrev);
        new->e2fs_lastfsck      =       swap32(old->e2fs_lastfsck);
        new->e2fs_fsckintv      =       swap32(old->e2fs_fsckintv);
        new->e2fs_creator       =       swap32(old->e2fs_creator);
        new->e2fs_rev           =       swap32(old->e2fs_rev);
        new->e2fs_ruid          =       swap16(old->e2fs_ruid);
        new->e2fs_rgid          =       swap16(old->e2fs_rgid);
        new->e2fs_first_ino     =       swap32(old->e2fs_first_ino);
        new->e2fs_inode_size    =       swap16(old->e2fs_inode_size);
        new->e2fs_block_group_nr =      swap16(old->e2fs_block_group_nr);
        new->e2fs_features_compat =     swap32(old->e2fs_features_compat);
        new->e2fs_features_incompat =   swap32(old->e2fs_features_incompat);
        new->e2fs_features_rocompat =   swap32(old->e2fs_features_rocompat);
        new->e2fs_algo          =       swap32(old->e2fs_algo);

        /* SOME journaling-related fields. */
        new->e2fs_journal_ino   =       swap32(old->e2fs_journal_ino);
        new->e2fs_journal_dev   =       swap32(old->e2fs_journal_dev);
        new->e2fs_last_orphan   =       swap32(old->e2fs_last_orphan);
        new->e2fs_gdesc_size    =       swap16(old->e2fs_gdesc_size);
        new->e2fs_default_mount_opts    =       swap32(old->e2fs_default_mount_opts);
        new->e2fs_first_meta_bg =       swap32(old->e2fs_first_meta_bg);
        new->e2fs_mkfs_time     =       swap32(old->e2fs_mkfs_time);
}

void
e2fs_cg_bswap(struct ext2_gd *old, struct ext2_gd *new, int size)
{
        int i;
        for (i=0; i < (size / sizeof(struct  ext2_gd)); i++) {
                new[i].ext2bgd_b_bitmap = swap32(old[i].ext2bgd_b_bitmap);
                new[i].ext2bgd_i_bitmap = swap32(old[i].ext2bgd_i_bitmap);
                new[i].ext2bgd_i_tables = swap32(old[i].ext2bgd_i_tables);
                new[i].ext2bgd_nbfree   = swap16(old[i].ext2bgd_nbfree);
                new[i].ext2bgd_nifree   = swap16(old[i].ext2bgd_nifree);
                new[i].ext2bgd_ndirs    = swap16(old[i].ext2bgd_ndirs);
        }
}

void
e2fs_i_bswap(struct m_ext2fs *fs, struct ext2fs_dinode *old,
    struct ext2fs_dinode *new)
{
        new->e2di_mode          =       swap16(old->e2di_mode);
        new->e2di_uid_low       =       swap16(old->e2di_uid_low);
        new->e2di_gid_low       =       swap16(old->e2di_gid_low);
        new->e2di_uid_high      =       swap16(old->e2di_uid_high);
        new->e2di_gid_high      =       swap16(old->e2di_gid_high);
        new->e2di_nlink         =       swap16(old->e2di_nlink);
        new->e2di_size          =       swap32(old->e2di_size);
        new->e2di_atime         =       swap32(old->e2di_atime);
        new->e2di_ctime         =       swap32(old->e2di_ctime);
        new->e2di_mtime         =       swap32(old->e2di_mtime);
        new->e2di_dtime         =       swap32(old->e2di_dtime);
        new->e2di_nblock        =       swap32(old->e2di_nblock);
        new->e2di_flags         =       swap32(old->e2di_flags);
        new->e2di_gen           =       swap32(old->e2di_gen);
        new->e2di_facl          =       swap32(old->e2di_facl);
        new->e2di_size_hi       =       swap32(old->e2di_size_hi);
        new->e2di_faddr         =       swap32(old->e2di_faddr);
        new->e2di_nblock_hi     =       swap16(old->e2di_nblock_hi);
        new->e2di_facl_hi       =       swap16(old->e2di_facl_hi);
        memcpy(&new->e2di_blocks[0], &old->e2di_blocks[0],
                (NDADDR+NIADDR) * sizeof(int));

        if (EXT2_DINODE_SIZE(fs) <= EXT2_REV0_DINODE_SIZE)
                return;
        new->e2di_isize         =       swap16(old->e2di_isize);
}
#endif