Signed-off-by: juergen.gross@xxxxxxxxxxxxxx

diff -r c87ec146229a tools/python/xen/util/sxputils.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/python/xen/util/sxputils.py	Mon Apr 26 07:14:28 2010 +0200
@@ -0,0 +1,64 @@
+#============================================================================
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of version 2.1 of the GNU Lesser General Public
+# License as published by the Free Software Foundation.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#============================================================================
+# Copyright (c) 2009 Fujitsu Technology Solutions
+#============================================================================
+
+""" convert sxp to map / map to sxp.
+"""
+
+import types
+from xen.xend import sxp
+
+def map2sxp(map_val):
+    """ conversion of all key-value pairs of a map (recursively) to sxp.
+        @param map_val: map; if a value contains a list or dict it is also
+                    converted to sxp
+        @type map_val: dict
+        @return sxp expr
+        @rtype: list
+    """
+    sxp_vals = []
+    for (k, v) in map_val.items():
+        if isinstance(v, types.DictionaryType):
+            sxp_vals += [[k] + map2sxp(v)]
+        elif isinstance(v, types.ListType):
+            sxp_vals += [[k] + v]
+        else:
+            sxp_vals += [[k, v]]
+    return sxp_vals
+
+def sxp2map( s ):
+    """ conversion of sxp to map.
+        @param s: sxp expr
+        @type s:  list
+        @return: map
+        @rtype: dict
+    """
+    sxphash = {}
+
+    for child in sxp.children( s ):
+        if isinstance( child, types.ListType ) and len( child ) > 1:
+            if isinstance( child[1], types.ListType ) and len( child[1] ) > 1:
+                sxphash[ child[0] ] = sxp2map( child )
+            else:
+                childs = sxp.children(child)
+                if len(childs) > 1:
+                    sxphash[ child[0] ] = childs
+                else:
+                    sxphash[ child[0] ] = childs[0]
+
+    return sxphash
+
+