blob: 4714e97ab81405ad59851e681fd6e17b123bc843 [file] [log] [blame]
Rich Lanea06d0c32013-03-25 08:52:03 -07001:: # Copyright 2013, Big Switch Networks, Inc.
2:: #
3:: # LoxiGen is licensed under the Eclipse Public License, version 1.0 (EPL), with
4:: # the following special exception:
5:: #
6:: # LOXI Exception
7:: #
8:: # As a special exception to the terms of the EPL, you may distribute libraries
9:: # generated by LoxiGen (LoxiGen Libraries) under the terms of your choice, provided
10:: # that copyright and licensing notices generated by LoxiGen are not altered or removed
11:: # from the LoxiGen Libraries and the notice provided below is (i) included in
12:: # the LoxiGen Libraries, if distributed in source code form and (ii) included in any
13:: # documentation for the LoxiGen Libraries, if distributed in binary form.
14:: #
15:: # Notice: "Copyright 2013, Big Switch Networks, Inc. This library was generated by the LoxiGen Compiler."
16:: #
17:: # You may not use this file except in compliance with the EPL or LOXI Exception. You may obtain
18:: # a copy of the EPL at:
19:: #
20:: # http://www.eclipse.org/legal/epl-v10.html
21:: #
22:: # Unless required by applicable law or agreed to in writing, software
23:: # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
24:: # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
25:: # EPL for the specific language governing permissions and limitations
26:: # under the EPL.
27::
28:: # TODO coalesce format strings
Rich Lane002e70c2013-05-09 17:08:16 -070029:: from loxi_ir import *
Rich Laneda11f8b2013-06-19 15:53:25 -070030:: from py_gen.oftype import gen_pack_expr
Rich Lane8ca3b772013-04-30 13:36:55 -070031:: length_member = None
Rich Lanea06d0c32013-03-25 08:52:03 -070032:: length_member_index = None
Rich Lane193317b2013-05-01 12:09:42 -070033:: field_length_members = {}
34:: field_length_indexes = {}
Rich Lanea06d0c32013-03-25 08:52:03 -070035:: index = 0
Rich Lane8ca3b772013-04-30 13:36:55 -070036:: for m in ofclass.members:
Rich Lane002e70c2013-05-09 17:08:16 -070037:: if type(m) == OFLengthMember:
Rich Lane8ca3b772013-04-30 13:36:55 -070038:: length_member = m
Rich Lanea06d0c32013-03-25 08:52:03 -070039:: length_member_index = index
Rich Laneda11f8b2013-06-19 15:53:25 -070040 packed.append(${gen_pack_expr(m.oftype, '0')}) # placeholder for ${m.name} at index ${index}
Rich Lane002e70c2013-05-09 17:08:16 -070041:: elif type(m) == OFFieldLengthMember:
Rich Lane193317b2013-05-01 12:09:42 -070042:: field_length_members[m.field_name] = m
43:: field_length_indexes[m.field_name] = index
Rich Laneda11f8b2013-06-19 15:53:25 -070044 packed.append(${gen_pack_expr(m.oftype, '0')}) # placeholder for ${m.name} at index ${index}
Rich Lane002e70c2013-05-09 17:08:16 -070045:: elif type(m) == OFPadMember:
Rich Lanec2685792013-04-30 14:08:33 -070046 packed.append('\x00' * ${m.length})
Rich Lanea06d0c32013-03-25 08:52:03 -070047:: else:
Rich Laneda11f8b2013-06-19 15:53:25 -070048 packed.append(${gen_pack_expr(m.oftype, 'self.' + m.name)})
Rich Lane193317b2013-05-01 12:09:42 -070049:: if m.name in field_length_members:
50:: field_length_member = field_length_members[m.name]
51:: field_length_index = field_length_indexes[m.name]
Rich Laneda11f8b2013-06-19 15:53:25 -070052 packed[${field_length_index}] = ${gen_pack_expr(field_length_member.oftype, 'len(packed[-1])')}
Rich Lane193317b2013-05-01 12:09:42 -070053:: #endif
Rich Lanea06d0c32013-03-25 08:52:03 -070054:: #endif
55:: index += 1
56:: #endfor
57:: if length_member_index != None:
58 length = sum([len(x) for x in packed])
Rich Laneda11f8b2013-06-19 15:53:25 -070059 packed[${length_member_index}] = ${gen_pack_expr(length_member.oftype, 'length')}
Rich Lanea06d0c32013-03-25 08:52:03 -070060:: #endif
Rich Lane3005cf92013-05-01 12:33:35 -070061:: if ofclass.name == 'of_match_v3':
62 packed.append('\x00' * ((length + 7)/8*8 - length))
63:: #endif