Add function to create a new root.

src/node.c

@@ -12,6 +12,7 @@
 
 #include <stdlib.h>
 #include <string.h>
+#include <time.h>
 
 /**
  * Increments the reference counting of the given node.
@@ -392,3 +393,17 @@ int iso_dir_iter_remove(IsoDirIter *iter)
     return iso_node_remove(pos);
 }
 
+int iso_node_new_root(IsoDir **root)
+{
+    IsoDir *dir;
+    
+    dir = calloc(1, sizeof(IsoDir));
+    if (dir == NULL) {
+        return ISO_MEM_ERROR;
+    }
+    dir->node.type = LIBISO_DIR;
+    dir->node.atime = dir->node.ctime = dir->node.mtime = time(NULL);
+    dir->node.mode = S_IFDIR | 0555;
+    *root = dir;
+    return ISO_SUCCESS;
+}

src/node.h

@@ -73,11 +73,8 @@ struct Iso_Node
     IsoDir *parent; /**< parent node, NULL for root */
 
     /*
-     * Pointers to the doubled linked list of children in a dir.
-     * It is a circular list where the last child points to the first
-     * and viceversa.
+     * Pointer to the linked list of children in a dir.
      */
-    IsoNode *prev;
     IsoNode *next;
 };
 
@@ -118,4 +115,6 @@ struct Iso_Dir_Iter
     IsoNode *pos;
 };
 
+int iso_node_new_root(IsoDir **root);
+
 #endif /*LIBISO_NODE_H_*/