bootx.tproj/fs.subproj/ext2fs_bswap.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*      $NetBSD: ext2fs_bswap.c,v 1.4 2000/01/28 16:00:23 bouyer Exp $  */
  26 /*
  27  * Copyright (c) 1997 Manuel Bouyer.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by the University of
  40  *      California, Berkeley and its contributors.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  *
  57  */
  58 /*
  59  *  ext2fs_bswap.c - Functions for endian swapping Ext2 disk structures.
  60  *
  61  *  Copyright (c) 2000 Apple Computer, Inc.
  62  *
  63  *  DRI: Josh de Cesare
  64  */
  65
  66 #include <sl.h>
  67
  68 #include "ext2fs.h"
  69 #include "ext2fs_dinode.h"
  70
  71 /* These functions are only needed if native byte order is not big endian */
  72 #if BYTE_ORDER == BIG_ENDIAN
  73 void
  74 e2fs_sb_bswap(old, new)
  75         struct ext2fs *old, *new;
  76 {
  77         /* preserve unused fields */
  78         memcpy(new, old, sizeof(struct ext2fs));
  79         new->e2fs_icount        =       bswap32(old->e2fs_icount);
  80         new->e2fs_bcount        =       bswap32(old->e2fs_bcount);
  81         new->e2fs_rbcount       =       bswap32(old->e2fs_rbcount);
  82         new->e2fs_fbcount       =       bswap32(old->e2fs_fbcount);
  83         new->e2fs_ficount       =       bswap32(old->e2fs_ficount);
  84         new->e2fs_first_dblock  =       bswap32(old->e2fs_first_dblock);
  85         new->e2fs_log_bsize     =       bswap32(old->e2fs_log_bsize);
  86         new->e2fs_fsize         =       bswap32(old->e2fs_fsize);
  87         new->e2fs_bpg           =       bswap32(old->e2fs_bpg);
  88         new->e2fs_fpg           =       bswap32(old->e2fs_fpg);
  89         new->e2fs_ipg           =       bswap32(old->e2fs_ipg);
  90         new->e2fs_mtime         =       bswap32(old->e2fs_mtime);
  91         new->e2fs_wtime         =       bswap32(old->e2fs_wtime);
  92         new->e2fs_mnt_count     =       bswap16(old->e2fs_mnt_count);
  93         new->e2fs_max_mnt_count =       bswap16(old->e2fs_max_mnt_count);
  94         new->e2fs_magic         =       bswap16(old->e2fs_magic);
  95         new->e2fs_state         =       bswap16(old->e2fs_state);
  96         new->e2fs_beh           =       bswap16(old->e2fs_beh);
  97         new->e2fs_minrev        =       bswap16(old->e2fs_minrev);
  98         new->e2fs_lastfsck      =       bswap32(old->e2fs_lastfsck);
  99         new->e2fs_fsckintv      =       bswap32(old->e2fs_fsckintv);
 100         new->e2fs_creator       =       bswap32(old->e2fs_creator);
 101         new->e2fs_rev           =       bswap32(old->e2fs_rev);
 102         new->e2fs_ruid          =       bswap16(old->e2fs_ruid);
 103         new->e2fs_rgid          =       bswap16(old->e2fs_rgid);
 104         new->e2fs_first_ino     =       bswap32(old->e2fs_first_ino);
 105         new->e2fs_inode_size    =       bswap16(old->e2fs_inode_size);
 106         new->e2fs_block_group_nr =      bswap16(old->e2fs_block_group_nr);
 107         new->e2fs_features_compat =     bswap32(old->e2fs_features_compat);
 108         new->e2fs_features_incompat =   bswap32(old->e2fs_features_incompat);
 109         new->e2fs_features_rocompat =   bswap32(old->e2fs_features_rocompat);
 110         new->e2fs_algo          =       bswap32(old->e2fs_algo);
 111 }
 112
 113 void e2fs_cg_bswap(old, new, size)
 114         struct  ext2_gd *old, *new;
 115         int size;
 116 {
 117         int i;
 118         for (i=0; i < (size / sizeof(struct  ext2_gd)); i++) {
 119                 new[i].ext2bgd_b_bitmap = bswap32(old[i].ext2bgd_b_bitmap);
 120                 new[i].ext2bgd_i_bitmap = bswap32(old[i].ext2bgd_i_bitmap);
 121                 new[i].ext2bgd_i_tables = bswap32(old[i].ext2bgd_i_tables);
 122                 new[i].ext2bgd_nbfree   = bswap16(old[i].ext2bgd_nbfree);
 123                 new[i].ext2bgd_nifree   = bswap16(old[i].ext2bgd_nifree);
 124                 new[i].ext2bgd_ndirs    = bswap16(old[i].ext2bgd_ndirs);
 125         }
 126 }
 127
 128 void e2fs_i_bswap(old, new)
 129         struct ext2fs_dinode *old, *new;
 130 {
 131         new->e2di_mode          =       bswap16(old->e2di_mode);
 132         new->e2di_uid           =       bswap16(old->e2di_uid);
 133         new->e2di_gid           =       bswap16(old->e2di_gid);
 134         new->e2di_nlink         =       bswap16(old->e2di_nlink);
 135         new->e2di_size          =       bswap32(old->e2di_size);
 136         new->e2di_atime         =       bswap32(old->e2di_atime);
 137         new->e2di_ctime         =       bswap32(old->e2di_ctime);
 138         new->e2di_mtime         =       bswap32(old->e2di_mtime);
 139         new->e2di_dtime         =       bswap32(old->e2di_dtime);
 140         new->e2di_nblock        =       bswap32(old->e2di_nblock);
 141         new->e2di_flags         =       bswap32(old->e2di_flags);
 142         new->e2di_gen           =       bswap32(old->e2di_gen);
 143         new->e2di_facl          =       bswap32(old->e2di_facl);
 144         new->e2di_dacl          =       bswap32(old->e2di_dacl);
 145         new->e2di_faddr         =       bswap32(old->e2di_faddr);
 146         memcpy(&new->e2di_blocks[0], &old->e2di_blocks[0],
 147                 (NDADDR+NIADDR) * sizeof(int));
 148 }
 149 #endif