1 /*
2 * cmp_bitmaps.c --- routines to compare inode and block bitmaps.
3 *
4 * Copyright (C) 1995 Theodore Ts'o.
5 *
6 * %Begin-Header%
7 * This file may be redistributed under the terms of the GNU Public
8 * License.
9 * %End-Header%
10 */
11
12 #include <stdio.h>
13 #include <string.h>
14 #if HAVE_UNISTD_H
15 #include <unistd.h>
16 #endif
17 #include <fcntl.h>
18 #include <time.h>
19 #if HAVE_SYS_STAT_H
20 #include <sys/stat.h>
21 #endif
22 #if HAVE_SYS_TYPES_H
23 #include <sys/types.h>
24 #endif
25
26 #include "ext2_fs.h"
27 #include "ext2fs.h"
28
ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1,ext2fs_block_bitmap bm2)29 errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1,
30 ext2fs_block_bitmap bm2)
31 {
32 blk_t i;
33
34 EXT2_CHECK_MAGIC(bm1, EXT2_ET_MAGIC_BLOCK_BITMAP);
35 EXT2_CHECK_MAGIC(bm2, EXT2_ET_MAGIC_BLOCK_BITMAP);
36
37 if ((bm1->start != bm2->start) ||
38 (bm1->end != bm2->end) ||
39 (memcmp(bm1->bitmap, bm2->bitmap,
40 (size_t) (bm1->end - bm1->start)/8)))
41 return EXT2_ET_NEQ_BLOCK_BITMAP;
42
43 for (i = bm1->end - ((bm1->end - bm1->start) % 8); i <= bm1->end; i++)
44 if (ext2fs_fast_test_block_bitmap(bm1, i) !=
45 ext2fs_fast_test_block_bitmap(bm2, i))
46 return EXT2_ET_NEQ_BLOCK_BITMAP;
47
48 return 0;
49 }
50
ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1,ext2fs_inode_bitmap bm2)51 errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1,
52 ext2fs_inode_bitmap bm2)
53 {
54 ext2_ino_t i;
55
56 EXT2_CHECK_MAGIC(bm1, EXT2_ET_MAGIC_INODE_BITMAP);
57 EXT2_CHECK_MAGIC(bm2, EXT2_ET_MAGIC_INODE_BITMAP);
58
59 if ((bm1->start != bm2->start) ||
60 (bm1->end != bm2->end) ||
61 (memcmp(bm1->bitmap, bm2->bitmap,
62 (size_t) (bm1->end - bm1->start)/8)))
63 return EXT2_ET_NEQ_INODE_BITMAP;
64
65 for (i = bm1->end - ((bm1->end - bm1->start) % 8); i <= bm1->end; i++)
66 if (ext2fs_fast_test_inode_bitmap(bm1, i) !=
67 ext2fs_fast_test_inode_bitmap(bm2, i))
68 return EXT2_ET_NEQ_INODE_BITMAP;
69
70 return 0;
71 }
72
73