blob: 7f78ff8042013a826fc2bfbcba01ac31564681cd
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * cmp_bitmaps.c --- routines to compare inode and block bitmaps. |
4 | * |
5 | * Copyright (C) 1995 Theodore Ts'o. |
6 | * |
7 | * %Begin-Header% |
8 | * This file may be redistributed under the terms of the GNU Public |
9 | * License. |
10 | * %End-Header% |
11 | */ |
12 | |
13 | #include <stdio.h> |
14 | #include <string.h> |
15 | #if HAVE_UNISTD_H |
16 | #include <unistd.h> |
17 | #endif |
18 | #include <fcntl.h> |
19 | #include <time.h> |
20 | #if HAVE_SYS_STAT_H |
21 | #include <sys/stat.h> |
22 | #endif |
23 | #if HAVE_SYS_TYPES_H |
24 | #include <sys/types.h> |
25 | #endif |
26 | |
27 | #include "ext2_fs.h" |
28 | #include "ext2fs.h" |
29 | |
30 | errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1, |
31 | ext2fs_block_bitmap bm2) |
32 | { |
33 | blk_t i; |
34 | |
35 | EXT2_CHECK_MAGIC(bm1, EXT2_ET_MAGIC_BLOCK_BITMAP); |
36 | EXT2_CHECK_MAGIC(bm2, EXT2_ET_MAGIC_BLOCK_BITMAP); |
37 | |
38 | if ((bm1->start != bm2->start) || |
39 | (bm1->end != bm2->end) || |
40 | (memcmp(bm1->bitmap, bm2->bitmap, |
41 | (size_t) (bm1->end - bm1->start)/8))) |
42 | return EXT2_ET_NEQ_BLOCK_BITMAP; |
43 | |
44 | for (i = bm1->end - ((bm1->end - bm1->start) % 8); i <= bm1->end; i++) |
45 | if (ext2fs_fast_test_block_bitmap(bm1, i) != |
46 | ext2fs_fast_test_block_bitmap(bm2, i)) |
47 | return EXT2_ET_NEQ_BLOCK_BITMAP; |
48 | |
49 | return 0; |
50 | } |
51 | |
52 | errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1, |
53 | ext2fs_inode_bitmap bm2) |
54 | { |
55 | ext2_ino_t i; |
56 | |
57 | EXT2_CHECK_MAGIC(bm1, EXT2_ET_MAGIC_INODE_BITMAP); |
58 | EXT2_CHECK_MAGIC(bm2, EXT2_ET_MAGIC_INODE_BITMAP); |
59 | |
60 | if ((bm1->start != bm2->start) || |
61 | (bm1->end != bm2->end) || |
62 | (memcmp(bm1->bitmap, bm2->bitmap, |
63 | (size_t) (bm1->end - bm1->start)/8))) |
64 | return EXT2_ET_NEQ_INODE_BITMAP; |
65 | |
66 | for (i = bm1->end - ((bm1->end - bm1->start) % 8); i <= bm1->end; i++) |
67 | if (ext2fs_fast_test_inode_bitmap(bm1, i) != |
68 | ext2fs_fast_test_inode_bitmap(bm2, i)) |
69 | return EXT2_ET_NEQ_INODE_BITMAP; |
70 | |
71 | return 0; |
72 | } |
73 |