API: Add support for type aliases

[vpp.git] / src / vpp-api / python / vpp_papi / vpp_serializer.py

diff --git a/src/vpp-api/python/vpp_papi/vpp_serializer.py b/src/vpp-api/python/vpp_papi/vpp_serializer.py
index bd0f738..a001cca 100644 (file)
--- a/src/vpp-api/python/vpp_papi/vpp_serializer.py
+++ b/src/vpp-api/python/vpp_papi/vpp_serializer.py
@@ -79,7 +79,7 @@ class FixedList_u8(object):
         self.packer = BaseTypes(field_type, num)
         self.size = self.packer.size
 
-    def pack(self, list, kwargs):
+    def pack(self, list, kwargs = None):
         """Packs a fixed length bytestring. Left-pads with zeros
         if input data is too short."""
         if not list:
@@ -277,6 +277,18 @@ class VPPUnionType(object):
         return self.tuple._make(r), maxsize
 
 
+def VPPTypeAlias(name, msgdef):
+    t = vpp_get_type(msgdef['type'])
+    if not t:
+        raise ValueError()
+    if 'length' in msgdef:
+        if msgdef['length'] == 0:
+            raise ValueError()
+        types[name] = FixedList(name, msgdef['type'], msgdef['length'])
+    else:
+        types[name] = t
+
+
 class VPPType(object):
     # Set everything up to be able to pack / unpack
     def __init__(self, name, msgdef):