Implement function to compute the size needed for RR field.

src/rockridge.h

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2007 Vreixo Formoso
+ * Copyright (c) 2007 Mario Danic
+ * 
+ * This file is part of the libisofs project; you can redistribute it and/or 
+ * modify it under the terms of the GNU General Public License version 2 as 
+ * published by the Free Software Foundation. See COPYING file for details.
+ */
+
+/** 
+ * Functions and structures used for Rock Ridge support.
+ * 
+ * See IEEE P1282, Rock Ridge Interchange Protocol, Draft Standard version
+ * 1.12 for further details.
+ */
+
+#ifndef LIBISO_ROCKRIDGE_H
+#define LIBISO_ROCKRIDGE_H
+
+#include "ecma119.h"
+
+/**
+ * Compute the length needed for write all RR and SUSP entries for a given
+ * node.
+ * 
+ * @param type
+ *      0 normal entry, 1 "." entry for that node (it is a dir), 2 ".."
+ *      for that node (i.e., it will refer to the parent)
+ * @param space
+ *      Available space in the System Use Area for the directory record.
+ * @param ce
+ *      Will be filled with the space needed in a CE
+ * @return
+ *      The size needed for the RR entries in the System Use Area
+ */
+size_t rrip_calc_len(Ecma119Image *t, Ecma119Node *n, int type,
+                     size_t space, size_t *ce);
+
+#endif /* LIBISO_ROCKRIDGE_H */