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
29errcode_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
51errcode_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