[821] | 1 | /*
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| 2 | * cmp_bitmaps.c --- routines to compare inode and block bitmaps.
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| 3 | *
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| 4 | * Copyright (C) 1995 Theodore Ts'o.
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| 5 | *
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| 6 | * %Begin-Header%
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| 7 | * This file may be redistributed under the terms of the GNU Public
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| 8 | * License.
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| 9 | * %End-Header%
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| 10 | */
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| 11 |
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| 12 | #include <stdio.h>
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| 13 | #include <string.h>
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| 14 | #if HAVE_UNISTD_H
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| 15 | #include <unistd.h>
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| 16 | #endif
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| 17 | #include <fcntl.h>
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| 18 | #include <time.h>
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| 19 | #if HAVE_SYS_STAT_H
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| 20 | #include <sys/stat.h>
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| 21 | #endif
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| 22 | #if HAVE_SYS_TYPES_H
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| 23 | #include <sys/types.h>
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| 24 | #endif
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| 25 |
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| 26 | #include "ext2_fs.h"
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| 27 | #include "ext2fs.h"
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| 28 |
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| 29 | errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1,
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| 30 | ext2fs_block_bitmap bm2)
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| 31 | {
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| 32 | blk_t i;
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| 33 |
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| 34 | EXT2_CHECK_MAGIC(bm1, EXT2_ET_MAGIC_BLOCK_BITMAP);
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| 35 | EXT2_CHECK_MAGIC(bm2, EXT2_ET_MAGIC_BLOCK_BITMAP);
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| 36 |
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| 37 | if ((bm1->start != bm2->start) ||
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| 38 | (bm1->end != bm2->end) ||
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| 39 | (memcmp(bm1->bitmap, bm2->bitmap,
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| 40 | (size_t) (bm1->end - bm1->start)/8)))
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| 41 | return EXT2_ET_NEQ_BLOCK_BITMAP;
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| 42 |
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| 43 | for (i = bm1->end - ((bm1->end - bm1->start) % 8); i <= bm1->end; i++)
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| 44 | if (ext2fs_fast_test_block_bitmap(bm1, i) !=
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| 45 | ext2fs_fast_test_block_bitmap(bm2, i))
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| 46 | return EXT2_ET_NEQ_BLOCK_BITMAP;
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| 47 |
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| 48 | return 0;
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| 49 | }
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| 50 |
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| 51 | errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1,
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| 52 | ext2fs_inode_bitmap bm2)
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| 53 | {
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| 54 | ext2_ino_t i;
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| 55 |
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| 56 | EXT2_CHECK_MAGIC(bm1, EXT2_ET_MAGIC_INODE_BITMAP);
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| 57 | EXT2_CHECK_MAGIC(bm2, EXT2_ET_MAGIC_INODE_BITMAP);
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| 58 |
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| 59 | if ((bm1->start != bm2->start) ||
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| 60 | (bm1->end != bm2->end) ||
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| 61 | (memcmp(bm1->bitmap, bm2->bitmap,
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| 62 | (size_t) (bm1->end - bm1->start)/8)))
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| 63 | return EXT2_ET_NEQ_INODE_BITMAP;
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| 64 |
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| 65 | for (i = bm1->end - ((bm1->end - bm1->start) % 8); i <= bm1->end; i++)
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| 66 | if (ext2fs_fast_test_inode_bitmap(bm1, i) !=
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| 67 | ext2fs_fast_test_inode_bitmap(bm2, i))
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| 68 | return EXT2_ET_NEQ_INODE_BITMAP;
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| 69 |
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| 70 | return 0;
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| 71 | }
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| 72 |
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