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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