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 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 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
