| # 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. |
| |
| """ |
| Code generation |
| |
| These functions extract data from the IR and render templates with it. |
| """ |
| |
| from collections import namedtuple |
| from itertools import groupby |
| from StringIO import StringIO |
| import template_utils |
| from generic_utils import chunks |
| import loxi_globals |
| import loxi_ir.ir as ir |
| import util |
| import c_code_gen |
| import c_gen.of_g_legacy as of_g |
| import c_gen.type_maps as type_maps |
| import c_gen.c_type_maps as c_type_maps |
| |
| CLASS_CHUNK_SIZE = 32 |
| |
| PushWireTypesData = namedtuple('PushWireTypesData', |
| ['class_name', 'versioned_type_members']) |
| PushWireTypesMember = namedtuple('PushWireTypesMember', |
| ['name', 'offset', 'length', 'value']) |
| |
| def push_wire_types_data(uclass): |
| if uclass.virtual or not uclass.has_type_members: |
| return None |
| |
| # Generate a dict of version -> list of PushWireTypesMember |
| type_members_by_version = {} |
| for version, ofclass in sorted(uclass.version_classes.items()): |
| pwtms = [] |
| for m in ofclass.members: |
| if isinstance(m, ir.OFTypeMember): |
| if m.name == "version" and m.value == version.wire_version: |
| # Special case for version |
| pwtms.append(PushWireTypesMember(m.name, m.offset, m.length, "obj->version")) |
| else: |
| pwtms.append(PushWireTypesMember(m.name, m.offset, m.length, hex(m.value))) |
| type_members_by_version[version] = pwtms |
| |
| # Merge versions with identical type members |
| all_versions = sorted(type_members_by_version.keys()) |
| versioned_type_members = [] |
| for pwtms, versions in groupby(all_versions, type_members_by_version.get): |
| versioned_type_members.append((pwtms, list(versions))) |
| |
| return PushWireTypesData( |
| class_name=uclass.name, |
| versioned_type_members=versioned_type_members) |
| |
| ParseWireTypesData = namedtuple('ParseWireTypesData', |
| ['class_name', 'versioned']) |
| ParseWireTypesVersion = namedtuple('ParseWireTypesVersion', |
| ['discriminator', 'subclasses']) |
| ParseWireTypesSubclass = namedtuple('ParseWireTypesSubclass', |
| ['class_name', 'value', 'virtual']) |
| |
| def parse_wire_types_data(uclass): |
| if not uclass.virtual: |
| return None |
| |
| # Generate a dict of version -> ParseWireTypesVersion |
| versioned = {} |
| for version, ofclass in sorted(uclass.version_classes.items()): |
| discriminator = ofclass.discriminator |
| subclasses = [ParseWireTypesSubclass(class_name=subclass.name, |
| value=subclass.member_by_name(discriminator.name).value, |
| virtual=subclass.virtual) |
| for subclass in ofclass.protocol.classes if subclass.superclass and subclass.superclass.name == ofclass.name] |
| |
| subclasses.sort(key=lambda x: x.value) |
| versioned[version] = ParseWireTypesVersion(discriminator=discriminator, |
| subclasses=subclasses) |
| |
| return ParseWireTypesData(class_name=uclass.name, |
| versioned=sorted(versioned.items())) |
| |
| # Output multiple LOCI classes into each C file. This reduces the overhead of |
| # parsing header files, which takes longer than compiling the actual code |
| # for many classes. It also reduces the compiled code size. |
| def generate_classes(install_dir): |
| for i, chunk in enumerate(chunks(loxi_globals.unified.classes, CLASS_CHUNK_SIZE)): |
| with template_utils.open_output(install_dir, "loci/src/class%02d.c" % i) as out: |
| for uclass in chunk: |
| util.render_template(out, "class.c", |
| push_wire_types_data=push_wire_types_data(uclass), |
| parse_wire_types_data=parse_wire_types_data(uclass)) |
| # Append legacy generated code |
| c_code_gen.gen_new_function_definitions(out, uclass.name) |
| c_code_gen.gen_accessor_definitions(out, uclass.name) |
| |
| # TODO remove header classes and use the corresponding class instead |
| def generate_header_classes(install_dir): |
| for cls in of_g.standard_class_order: |
| if cls.find("_header") < 0: |
| continue |
| with template_utils.open_output(install_dir, "loci/src/%s.c" % cls) as out: |
| util.render_template(out, "class.c", |
| push_wire_types_data=None, |
| parse_wire_types_data=None) |
| # Append legacy generated code |
| c_code_gen.gen_new_function_definitions(out, cls) |
| c_code_gen.gen_accessor_definitions(out, cls) |
| |
| def generate_classes_header(install_dir): |
| # Collect legacy code |
| tmp = StringIO() |
| c_code_gen.gen_struct_typedefs(tmp) |
| c_code_gen.gen_new_function_declarations(tmp) |
| c_code_gen.gen_accessor_declarations(tmp) |
| c_code_gen.gen_generics(tmp) |
| |
| with template_utils.open_output(install_dir, "loci/inc/loci/loci_classes.h") as out: |
| util.render_template(out, "loci_classes.h", |
| legacy_code=tmp.getvalue()) |
| |
| def generate_lists(install_dir): |
| for cls in of_g.ordered_list_objects: |
| with template_utils.open_output(install_dir, "loci/src/%s.c" % cls) as out: |
| util.render_template(out, "class.c", |
| push_wire_types_data=None, |
| parse_wire_types_data=None) |
| # Append legacy generated code |
| c_code_gen.gen_new_function_definitions(out, cls) |
| c_code_gen.gen_list_accessors(out, cls) |
| |
| def generate_strings(install_dir): |
| object_id_strs = [] |
| object_id_strs.append("of_object") |
| object_id_strs.extend(of_g.ordered_messages) |
| object_id_strs.extend(of_g.ordered_non_messages) |
| object_id_strs.extend(of_g.ordered_list_objects) |
| object_id_strs.extend(of_g.ordered_pseudo_objects) |
| object_id_strs.append("of_unknown_object") |
| |
| with template_utils.open_output(install_dir, "loci/src/loci_strings.c") as out: |
| util.render_template(out, "loci_strings.c", object_id_strs=object_id_strs) |
| |
| def generate_init_map(install_dir): |
| with template_utils.open_output(install_dir, "loci/src/loci_init_map.c") as out: |
| util.render_template(out, "loci_init_map.c", classes=of_g.standard_class_order) |
| |
| def generate_type_maps(install_dir): |
| # Collect legacy code |
| tmp = StringIO() |
| c_type_maps.gen_type_to_obj_map_functions(tmp) |
| c_type_maps.gen_type_maps(tmp) |
| c_type_maps.gen_length_array(tmp) |
| c_type_maps.gen_extra_length_array(tmp) |
| |
| with template_utils.open_output(install_dir, "loci/src/of_type_maps.c") as out: |
| util.render_template(out, "of_type_maps.c", legacy_code=tmp.getvalue()) |
| |
| ClassMetadata = namedtuple('ClassMetadata', |
| ['name', 'wire_length_get', 'wire_length_set', 'wire_type_get', 'wire_type_set']) |
| |
| def generate_class_metadata(install_dir): |
| with template_utils.open_output(install_dir, "loci/inc/loci/loci_class_metadata.h") as out: |
| util.render_template(out, "loci_class_metadata.h") |
| |
| with template_utils.open_output(install_dir, "loci/src/loci_class_metadata.c") as out: |
| class_metadata = [] |
| for uclass in loxi_globals.unified.classes: |
| wire_length_get = 'NULL' |
| wire_length_set = 'NULL' |
| wire_type_get = 'NULL' |
| wire_type_set = 'NULL' |
| |
| if uclass and not uclass.virtual and uclass.has_type_members: |
| wire_type_set = '%s_push_wire_types' % uclass.name |
| |
| if uclass.is_message and uclass.name != "of_header": |
| wire_length_get = 'of_object_message_wire_length_get' |
| wire_length_set = 'of_object_message_wire_length_set' |
| elif uclass.is_action: |
| wire_length_set = 'of_tlv16_wire_length_set' |
| wire_length_get = 'of_tlv16_wire_length_get' |
| wire_type_get = 'of_action_wire_object_id_get' |
| elif uclass.is_action_id: |
| wire_length_set = 'of_tlv16_wire_length_set' |
| wire_length_get = 'of_tlv16_wire_length_get' |
| wire_type_get = 'of_action_id_wire_object_id_get' |
| elif uclass.is_instruction: |
| wire_length_set = 'of_tlv16_wire_length_set' |
| wire_length_get = 'of_tlv16_wire_length_get' |
| wire_type_get = 'of_instruction_wire_object_id_get' |
| elif uclass.is_instanceof('of_instruction_id'): |
| wire_length_set = 'of_tlv16_wire_length_set' |
| wire_length_get = 'of_tlv16_wire_length_get' |
| wire_type_get = 'of_instruction_id_wire_object_id_get' |
| elif uclass.is_instanceof('of_queue_prop'): |
| wire_length_set = 'of_tlv16_wire_length_set' |
| wire_length_get = 'of_tlv16_wire_length_get' |
| wire_type_get = 'of_queue_prop_wire_object_id_get' |
| elif uclass.is_instanceof('of_table_feature_prop'): |
| wire_length_set = 'of_tlv16_wire_length_set' |
| wire_length_get = 'of_tlv16_wire_length_get' |
| wire_type_get = 'of_table_feature_prop_wire_object_id_get' |
| elif uclass.is_instanceof('of_meter_band'): |
| wire_length_set = 'of_tlv16_wire_length_set' |
| wire_length_get = 'of_tlv16_wire_length_get' |
| wire_type_get = 'of_meter_band_wire_object_id_get' |
| elif uclass.is_instanceof('of_hello_elem'): |
| wire_length_set = 'of_tlv16_wire_length_set' |
| wire_length_get = 'of_tlv16_wire_length_get' |
| wire_type_get = 'of_hello_elem_wire_object_id_get' |
| elif uclass.is_instanceof('of_bsn_tlv'): |
| wire_length_set = 'of_tlv16_wire_length_set' |
| wire_length_get = 'of_tlv16_wire_length_get' |
| wire_type_get = 'of_bsn_tlv_wire_object_id_get' |
| elif uclass.is_oxm: |
| wire_length_get = 'of_oxm_wire_length_get' |
| wire_type_get = 'of_oxm_wire_object_id_get' |
| elif uclass.name == "of_packet_queue": |
| wire_length_get = 'of_packet_queue_wire_length_get' |
| wire_length_set = 'of_packet_queue_wire_length_set' |
| elif uclass.name == "of_list_meter_band_stats": |
| wire_length_get = 'of_list_meter_band_stats_wire_length_get' |
| elif uclass.name == "of_meter_stats": |
| wire_length_get = 'of_meter_stats_wire_length_get' |
| wire_length_set = 'of_meter_stats_wire_length_set' |
| elif uclass.name in ["of_group_desc_stats_entry", "of_group_stats_entry", |
| "of_flow_stats_entry", "of_bucket", "of_table_features", |
| "of_bsn_port_counter_stats_entry", "of_bsn_vlan_counter_stats_entry", |
| "of_bsn_gentable_entry_desc_stats_entry", "of_bsn_gentable_entry_stats_entry", |
| "of_bsn_gentable_desc_stats_entry"]: |
| wire_length_get = "of_u16_len_wire_length_get" |
| wire_length_set = "of_u16_len_wire_length_set" |
| elif uclass.name == 'of_match_v3': |
| wire_length_set = 'of_tlv16_wire_length_set' |
| wire_length_get = 'of_tlv16_wire_length_get' |
| wire_type_set = 'of_match_v3_push_wire_types' |
| |
| class_metadata.append(ClassMetadata( |
| name=uclass.name, |
| wire_length_get=wire_length_get, |
| wire_length_set=wire_length_set, |
| wire_type_get=wire_type_get, |
| wire_type_set=wire_type_set)) |
| |
| class_metadata.extend([ |
| ClassMetadata( |
| name="of_action_header", |
| wire_length_set='of_tlv16_wire_length_set', |
| wire_length_get='of_tlv16_wire_length_get', |
| wire_type_get='of_action_wire_object_id_get', |
| wire_type_set='NULL'), |
| ClassMetadata( |
| name="of_action_id_header", |
| wire_length_set='of_tlv16_wire_length_set', |
| wire_length_get='of_tlv16_wire_length_get', |
| wire_type_get='of_action_id_wire_object_id_get', |
| wire_type_set='NULL'), |
| ClassMetadata( |
| name="of_instruction_header", |
| wire_length_set='of_tlv16_wire_length_set', |
| wire_length_get='of_tlv16_wire_length_get', |
| wire_type_get='of_instruction_wire_object_id_get', |
| wire_type_set='NULL'), |
| ClassMetadata( |
| name="of_instruction_id_header", |
| wire_length_set='of_tlv16_wire_length_set', |
| wire_length_get='of_tlv16_wire_length_get', |
| wire_type_get='of_instruction_id_wire_object_id_get', |
| wire_type_set='NULL'), |
| ClassMetadata( |
| name="of_queue_prop_header", |
| wire_length_set='of_tlv16_wire_length_set', |
| wire_length_get='of_tlv16_wire_length_get', |
| wire_type_get='of_queue_prop_wire_object_id_get', |
| wire_type_set='NULL'), |
| ClassMetadata( |
| name="of_table_feature_prop_header", |
| wire_length_set='of_tlv16_wire_length_set', |
| wire_length_get='of_tlv16_wire_length_get', |
| wire_type_get='of_table_feature_prop_wire_object_id_get', |
| wire_type_set='NULL'), |
| ClassMetadata( |
| name="of_meter_band_header", |
| wire_length_set='of_tlv16_wire_length_set', |
| wire_length_get='of_tlv16_wire_length_get', |
| wire_type_get='of_meter_band_wire_object_id_get', |
| wire_type_set='NULL'), |
| ClassMetadata( |
| name="of_hello_elem_header", |
| wire_length_set='of_tlv16_wire_length_set', |
| wire_length_get='of_tlv16_wire_length_get', |
| wire_type_get='of_hello_elem_wire_object_id_get', |
| wire_type_set='NULL'), |
| ClassMetadata( |
| name="of_bsn_tlv_header", |
| wire_length_set='of_tlv16_wire_length_set', |
| wire_length_get='of_tlv16_wire_length_get', |
| wire_type_get='of_bsn_tlv_wire_object_id_get', |
| wire_type_set='NULL'), |
| ClassMetadata( |
| name="of_oxm_header", |
| wire_length_set='NULL', |
| wire_length_get='of_oxm_wire_length_get', |
| wire_type_get='of_oxm_wire_object_id_get', |
| wire_type_set='NULL'), |
| ]) |
| |
| util.render_template(out, "loci_class_metadata.c", class_metadata=class_metadata) |