| Rich Lane | a06d0c3 | 2013-03-25 08:52:03 -0700 | [diff] [blame] | 1 | # 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 | """ |
| 29 | Utilities for generating the target Python code |
| 30 | """ |
| 31 | |
| 32 | import os |
| 33 | import of_g |
| 34 | import loxi_front_end.type_maps as type_maps |
| 35 | import loxi_utils.loxi_utils as utils |
| 36 | |
| 37 | templates_dir = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'templates') |
| 38 | |
| 39 | def render_template(out, name, **context): |
| 40 | utils.render_template(out, name, [templates_dir], context) |
| 41 | |
| 42 | def render_static(out, name): |
| 43 | utils.render_static(out, name, [templates_dir]) |
| 44 | |
| 45 | def lookup_unified_class(cls, version): |
| 46 | unified_class = of_g.unified[cls][version] |
| 47 | if "use_version" in unified_class: # deref version ref |
| 48 | ref_version = unified_class["use_version"] |
| 49 | unified_class = of_g.unified[cls][ref_version] |
| 50 | return unified_class |
| 51 | |
| 52 | def primary_wire_type(cls, version): |
| 53 | if cls in type_maps.stats_reply_list: |
| 54 | return type_maps.type_val[("of_stats_reply", version)] |
| 55 | elif cls in type_maps.stats_request_list: |
| 56 | return type_maps.type_val[("of_stats_request", version)] |
| 57 | elif cls in type_maps.flow_mod_list: |
| 58 | return type_maps.type_val[("of_flow_mod", version)] |
| 59 | elif (cls, version) in type_maps.type_val: |
| 60 | return type_maps.type_val[(cls, version)] |
| 61 | elif type_maps.message_is_extension(cls, version): |
| 62 | return type_maps.type_val[("of_experimenter", version)] |
| 63 | elif type_maps.action_is_extension(cls, version): |
| 64 | return type_maps.type_val[("of_action_experimenter", version)] |
| 65 | elif type_maps.action_id_is_extension(cls, version): |
| 66 | return type_maps.type_val[("of_action_id_experimenter", version)] |
| 67 | elif type_maps.instruction_is_extension(cls, version): |
| 68 | return type_maps.type_val[("of_instruction_experimenter", version)] |
| 69 | elif type_maps.queue_prop_is_extension(cls, version): |
| 70 | return type_maps.type_val[("of_queue_prop_experimenter", version)] |
| 71 | elif type_maps.table_feature_prop_is_extension(cls, version): |
| 72 | return type_maps.type_val[("of_table_feature_prop_experimenter", version)] |
| 73 | else: |
| 74 | raise ValueError |
| 75 | |
| 76 | def constant_for_value(version, group, value): |
| 77 | return (["const." + v["ofp_name"] for k, v in of_g.identifiers.items() |
| 78 | if k in of_g.identifiers_by_group[group] and |
| 79 | eval(v["values_by_version"].get(version, "None")) == value] or [value])[0] |