1 files changed, 34 insertions, 0 deletions
diff --git a/cpukit/libfs/src/rfs/rtems-rfs-dir-hash.h b/cpukit/libfs/src/rfs/rtems-rfs-dir-hash.h
new file mode 100644
index 0000000000..ca761dd0cc
--- /dev/null
+++ b/cpukit/libfs/src/rfs/rtems-rfs-dir-hash.h
@@ -0,0 +1,34 @@
+/*
+ *  COPYRIGHT (c) 2010 Chris Johns <chrisj@rtems.org>
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+/**
+ * @file
+ *
+ * @ingroup rtems-rfs
+ *
+ * RTEMS File Systems Directory Hash provides a 32bit hash of a string. This is
+ * used to search a directory.
+ */
+
+#if !defined (_RTEMS_RFS_DIR_HASH_H_)
+#define _RTEMS_RFS_DIR_HAS_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+/**
+ * Compute a hash of the key over the length of string.
+ *
+ * @param key The key to calculate the hash of.
+ * @param length The length of the key in bytes.
+ * @return uint32_t The hash.
+ */
+uint32_t rtems_rfs_dir_hash (const void *key, size_t length);
+
+#endif