--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/configurationengine/source/plugins/symbian/ConeHCRPlugin/hcrplugin/hcr_header.py	Thu Mar 11 17:04:37 2010 +0200
@@ -0,0 +1,51 @@
+#
+# Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+# All rights reserved.
+# This component and the accompanying materials are made available
+# under the terms of "Eclipse Public License v1.0"
+# which accompanies this distribution, and is available
+# at the URL "http://www.eclipse.org/legal/epl-v10.html".
+#
+# Initial Contributors:
+# Nokia Corporation - initial contribution.
+#
+# Contributors:
+#
+# Description:
+#
+
+from struct import pack, unpack
+from hcrplugin.hcr_exceptions import InvalidHcrHeaderError
+
+class HcrHeader(object):
+    """
+    """
+    HEADER_FMT = '<4sHHIII12x'
+    HEADER_SIGNATURE = 'HCRf'
+    def __init__(self):
+        self.version    = 0
+        self.flags      = 0
+        self.nrecords   = 0
+        self.lsd_offset = 0
+        self.lsd_size   = 0
+
+    def loads(self, headerstr):
+        if len(headerstr) != 32:
+            raise InvalidHcrHeaderError('Invalid length of header data %r' % headerstr)
+        
+        result = unpack(self.HEADER_FMT, headerstr)
+        if not result[0] == self.HEADER_SIGNATURE:
+            raise InvalidHcrHeaderError('Invalid HCR signature in %r' % headerstr)
+        self.version    = result[1]
+        self.flags      = result[2]
+        self.nrecords   = result[3]
+        self.lsd_offset = result[4]
+        self.lsd_size   = result[5]
+        
+
+    def dumps(self):
+        return pack(self.HEADER_FMT, self.HEADER_SIGNATURE, self.version, 
+                                    self.flags, 
+                                    self.nrecords, 
+                                    self.lsd_offset,
+                                    self.lsd_size)
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