frontend: add name to OFInput

Just useful for debugging.
diff --git a/loxi_front_end/frontend.py b/loxi_front_end/frontend.py
index f4dece5..6746584 100644
--- a/loxi_front_end/frontend.py
+++ b/loxi_front_end/frontend.py
@@ -62,7 +62,7 @@
     else:
         raise InputError("Dont know how to create member: %s" % m_ast[0])
 
-def create_ofinput(ast):
+def create_ofinput(name, ast):
 
     """
     Create an OFInput from an AST
@@ -72,7 +72,7 @@
     @returns An OFInput object
     """
     ctx = FrontendCtx(set())
-    ofinput = OFInput(wire_versions=set(), classes=[], enums=[])
+    ofinput = OFInput(name, wire_versions=set(), classes=[], enums=[])
 
     for decl_ast in ast:
         if decl_ast[0] == 'struct':
diff --git a/loxi_ir.py b/loxi_ir.py
index a70f041..0fe5497 100644
--- a/loxi_ir.py
+++ b/loxi_ir.py
@@ -47,11 +47,12 @@
 """
 One input file
 
+@param name Name of the input file
 @param wire_versions Set of integer wire versions this file applies to
 @param classes List of OFClass objects in the same order as in the file
 @param enums List of Enum objects in the same order as in the file
 """
-OFInput = namedtuple('OFInput', ['wire_versions', 'classes', 'enums'])
+OFInput = namedtuple('OFInput', ['name', 'wire_versions', 'classes', 'enums'])
 
 """
 One version of the OpenFlow protocol
diff --git a/loxigen.py b/loxigen.py
index 7b78f63..31214ba 100755
--- a/loxigen.py
+++ b/loxigen.py
@@ -332,7 +332,7 @@
 
     # Create the OFInput from the AST
     try:
-        ofinput = frontend.create_ofinput(ast)
+        ofinput = frontend.create_ofinput(os.path.basename(filename), ast)
     except frontend.InputError as e:
         print "Error in %s: %s" % (os.path.basename(filename), str(e))
         sys.exit(1)
diff --git a/utest/test_frontend.py b/utest/test_frontend.py
index 8febfde..19cde4e 100755
--- a/utest/test_frontend.py
+++ b/utest/test_frontend.py
@@ -109,7 +109,7 @@
         ]
         self.assertEquals(expected_ast, ast)
 
-        ofinput = frontend.create_ofinput(ast)
+        ofinput = frontend.create_ofinput("test", ast)
         self.assertEquals(set([1, 2]), ofinput.wire_versions)
         expected_classes = [
             OFClass(name='of_echo_reply', superclass=None, members=[
@@ -180,7 +180,7 @@
         ]
         self.assertEquals(expected_ast, ast)
 
-        ofinput = frontend.create_ofinput(ast)
+        ofinput = frontend.create_ofinput("test", ast)
         expected_classes = [
             OFClass(name='of_queue_prop', superclass=None, members=[
                 OFDiscriminatorMember('type', 'uint16_t'),