[Linux-NTFS-cvs] CVS: linux-ntfs/include attrib.h,1.41,1.42

[Anton A. <an...@us...>]

Changes by: antona

Update of /cvsroot/linux-ntfs/linux-ntfs/include
In directory usw-pr-cvs1:/tmp/cvs-serv18654/include

Modified Files:
	attrib.h 
Log Message:
New API for compressing run lists into mapping pairs arrays and adapt mkntfs to that API. Addition of ntfs_walk_attrs().


Index: attrib.h
===================================================================
RCS file: /cvsroot/linux-ntfs/linux-ntfs/include/attrib.h,v
retrieving revision 1.41
retrieving revision 1.42
diff -U2 -r1.41 -r1.42
--- attrib.h	2 Jul 2002 23:47:10 -0000	1.41
+++ attrib.h	6 Jul 2002 20:07:59 -0000	1.42
@@ -83,4 +83,34 @@
 
 /**
+ * ntfs_walk_attrs - syntactic sugar for walking all attributes in an inode
+ * @ctx:	initialised attribute search context
+ *
+ * Syntactic sugar for walking attributes in an inode.
+ *
+ * Return 0 on success and -1 on error with errno set to the error code from
+ * ntfs_lookup_attr().
+ *
+ * Example: When you want to enumerate all attributes in an open ntfs inode
+ *	    @ni, you can simply do:
+ *
+ *	int err;
+ *	ntfs_attr_search_ctx *ctx = ntfs_get_attr_search_ctx(ni, NULL);
+ *	if (!ctx)
+ *		// Error code is in errno. Handle this case.
+ *	while (!(err = ntfs_walk_attrs(ctx))) {
+ *		ATTR_RECORD *attr = ctx->attr;
+ *		// attr now contains the next attribute. Do whatever you want
+ *		// with it and then just continue with the while loop.
+ *	}
+ *	if (err && errno != ENOENT)
+ *		// Ooops. An error occured! You should handle this case.
+ *	// Now finished with all attributes in the inode.
+ */
+static __inline__ int ntfs_walk_attrs(ntfs_attr_search_ctx *ctx)
+{
+	return ntfs_lookup_attr(0, NULL, 0, 0, 0, NULL, 0, ctx);
+}
+
+/**
  * ntfs_attr_state_bits - bits for the state field in the ntfs_attr structure
  */
@@ -199,4 +229,13 @@
 extern LCN ntfs_attr_vcn_to_lcn(ntfs_attr *na, const VCN vcn);
 extern run_list_element *ntfs_attr_find_vcn(ntfs_attr *na, const VCN vcn);
+
+extern int ntfs_get_nr_significant_bytes(const s64 n);
+extern int ntfs_get_size_for_mapping_pairs(const ntfs_volume *vol,
+		const run_list_element *rl);
+
+extern int ntfs_write_significant_bytes(s8 *dst, const s8 *dst_max,
+		const s64 n);
+extern int ntfs_build_mapping_pairs(const ntfs_volume *vol, s8 *dst,
+		const int dst_len, const run_list_element *rl);
 
 // FIXME / TODO: Above here the file is cleaned up. (AIA)