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