Initial import
LoxiGen is the work of several developers, not just myself.
diff --git a/py_gen/templates/util.py b/py_gen/templates/util.py
new file mode 100644
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--- /dev/null
+++ b/py_gen/templates/util.py
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+:: # Copyright 2013, Big Switch Networks, Inc.
+:: #
+:: # LoxiGen is licensed under the Eclipse Public License, version 1.0 (EPL), with
+:: # the following special exception:
+:: #
+:: # LOXI Exception
+:: #
+:: # As a special exception to the terms of the EPL, you may distribute libraries
+:: # generated by LoxiGen (LoxiGen Libraries) under the terms of your choice, provided
+:: # that copyright and licensing notices generated by LoxiGen are not altered or removed
+:: # from the LoxiGen Libraries and the notice provided below is (i) included in
+:: # the LoxiGen Libraries, if distributed in source code form and (ii) included in any
+:: # documentation for the LoxiGen Libraries, if distributed in binary form.
+:: #
+:: # Notice: "Copyright 2013, Big Switch Networks, Inc. This library was generated by the LoxiGen Compiler."
+:: #
+:: # You may not use this file except in compliance with the EPL or LOXI Exception. You may obtain
+:: # a copy of the EPL at:
+:: #
+:: # http://www.eclipse.org/legal/epl-v10.html
+:: #
+:: # Unless required by applicable law or agreed to in writing, software
+:: # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+:: # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+:: # EPL for the specific language governing permissions and limitations
+:: # under the EPL.
+::
+:: include('_copyright.py')
+
+:: include('_autogen.py')
+
+import loxi
+import const
+
+def unpack_array(deserializer, element_size, buf):
+ """
+ Deserialize an array of fixed length elements.
+ The deserializer function should take a buffer and return the new object.
+ """
+ if len(buf) % element_size != 0: raise loxi.ProtocolError("invalid array length")
+ n = len(buf) / element_size
+ return [deserializer(buffer(buf, i*element_size, element_size)) for i in range(n)]
+
+def pretty_mac(mac):
+ return ':'.join(["%02x" % x for x in mac])
+
+def pretty_ipv4(v):
+ return "%d.%d.%d.%d" % ((v >> 24) & 0xFF, (v >> 16) & 0xFF, (v >> 8) & 0xFF, v & 0xFF)
+
+def pretty_flags(v, flag_names):
+ set_flags = []
+ for flag_name in flag_names:
+ flag_value = getattr(const, flag_name)
+ if v & flag_value == flag_value:
+ set_flags.append(flag_name)
+ elif v & flag_value:
+ set_flags.append('%s&%#x' % (flag_name, v & flag_value))
+ v &= ~flag_value
+ if v:
+ set_flags.append("%#x" % v)
+ return '|'.join(set_flags) or '0'
+
+def pretty_wildcards(v):
+ if v == const.OFPFW_ALL:
+ return 'OFPFW_ALL'
+ flag_names = ['OFPFW_IN_PORT', 'OFPFW_DL_VLAN', 'OFPFW_DL_SRC', 'OFPFW_DL_DST',
+ 'OFPFW_DL_TYPE', 'OFPFW_NW_PROTO', 'OFPFW_TP_SRC', 'OFPFW_TP_DST',
+ 'OFPFW_NW_SRC_MASK', 'OFPFW_NW_DST_MASK', 'OFPFW_DL_VLAN_PCP',
+ 'OFPFW_NW_TOS']
+ return pretty_flags(v, flag_names)
+
+def pretty_port(v):
+ named_ports = [(k,v2) for (k,v2) in const.__dict__.iteritems() if k.startswith('OFPP_')]
+ for (k, v2) in named_ports:
+ if v == v2:
+ return k
+ return v