1 files changed, 72 insertions, 0 deletions

diff --git a/e2fsprogs/ext2fs/cmp_bitmaps.c b/e2fsprogs/ext2fs/cmp_bitmaps.c
new file mode 100644
index 000000000..51cc3d0a5
--- /dev/null
+++ b/e2fsprogs/ext2fs/cmp_bitmaps.c
@@ -0,0 +1,72 @@
+/*
+ * cmp_bitmaps.c --- routines to compare inode and block bitmaps.
+ *
+ * Copyright (C) 1995 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ */
+
+#include <stdio.h>
+#include <string.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <fcntl.h>
+#include <time.h>
+#if HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#include "ext2_fs.h"
+#include "ext2fs.h"
+
+errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1,
+                                      ext2fs_block_bitmap bm2)
+{
+        blk_t   i;
+        
+        EXT2_CHECK_MAGIC(bm1, EXT2_ET_MAGIC_BLOCK_BITMAP);
+        EXT2_CHECK_MAGIC(bm2, EXT2_ET_MAGIC_BLOCK_BITMAP);
+
+        if ((bm1->start != bm2->start) ||
+            (bm1->end != bm2->end) ||
+            (memcmp(bm1->bitmap, bm2->bitmap,
+                    (size_t) (bm1->end - bm1->start)/8)))
+                return EXT2_ET_NEQ_BLOCK_BITMAP;
+
+        for (i = bm1->end - ((bm1->end - bm1->start) % 8); i <= bm1->end; i++)
+                if (ext2fs_fast_test_block_bitmap(bm1, i) !=
+                    ext2fs_fast_test_block_bitmap(bm2, i))
+                        return EXT2_ET_NEQ_BLOCK_BITMAP;
+
+        return 0;
+}
+
+errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1,
+                                      ext2fs_inode_bitmap bm2)
+{
+        ext2_ino_t      i;
+        
+        EXT2_CHECK_MAGIC(bm1, EXT2_ET_MAGIC_INODE_BITMAP);
+        EXT2_CHECK_MAGIC(bm2, EXT2_ET_MAGIC_INODE_BITMAP);
+
+        if ((bm1->start != bm2->start) ||
+            (bm1->end != bm2->end) ||
+            (memcmp(bm1->bitmap, bm2->bitmap,
+                    (size_t) (bm1->end - bm1->start)/8)))
+                return EXT2_ET_NEQ_INODE_BITMAP;
+
+        for (i = bm1->end - ((bm1->end - bm1->start) % 8); i <= bm1->end; i++)
+                if (ext2fs_fast_test_inode_bitmap(bm1, i) !=
+                    ext2fs_fast_test_inode_bitmap(bm2, i))
+                        return EXT2_ET_NEQ_INODE_BITMAP;
+
+        return 0;
+}
+