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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.
from collections import defaultdict
import loxi_globals
import struct
import template_utils
import loxi_utils.loxi_utils as utils
import util
import oftype
from loxi_ir import *
modules_by_version = {}
# Map from inheritance root to module name
roots = {
'of_header': 'message',
'of_action': 'action',
'of_action_id': 'action_id',
'of_oxm': 'oxm',
'of_instruction': 'instruction',
'of_instruction_id': 'instruction_id',
'of_meter_band': 'meter_band',
'of_bsn_tlv': 'bsn_tlv',
}
# Return the module and class names for the generated Python class
def generate_pyname(ofclass):
for root, module_name in roots.items():
if ofclass.name == root:
return module_name, module_name
elif ofclass.is_instanceof(root):
if root == 'of_header':
# The input files don't prefix message names
return module_name, ofclass.name[3:]
else:
return module_name, ofclass.name[len(root)+1:]
return 'common', ofclass.name[3:]
# Create intermediate representation, extended from the LOXI IR
def build_ofclasses(version):
modules = defaultdict(list)
for ofclass in loxi_globals.ir[version].classes:
module_name, ofclass.pyname = generate_pyname(ofclass)
modules[module_name].append(ofclass)
return modules
def generate_init(out, name, version):
util.render_template(out, 'init.py', version=version)
def generate_action(out, name, version):
util.render_template(out, 'module.py',
ofclasses=modules_by_version[version]['action'],
version=version)
def generate_action_id(out, name, version):
util.render_template(out, 'module.py',
ofclasses=modules_by_version[version]['action_id'],
version=version)
def generate_oxm(out, name, version):
util.render_template(out, 'module.py',
ofclasses=modules_by_version[version]['oxm'],
version=version)
def generate_common(out, name, version):
util.render_template(out, 'module.py',
ofclasses=modules_by_version[version]['common'],
version=version,
extra_template='_common_extra.py')
def generate_const(out, name, version):
util.render_template(out, 'const.py', version=version,
enums=loxi_globals.ir[version].enums)
def generate_instruction(out, name, version):
util.render_template(out, 'module.py',
ofclasses=modules_by_version[version]['instruction'],
version=version)
def generate_instruction_id(out, name, version):
util.render_template(out, 'module.py',
ofclasses=modules_by_version[version]['instruction_id'],
version=version)
def generate_message(out, name, version):
util.render_template(out, 'module.py',
ofclasses=modules_by_version[version]['message'],
version=version,
extra_template='_message_extra.py')
def generate_meter_band(out, name, version):
util.render_template(out, 'module.py',
ofclasses=modules_by_version[version]['meter_band'],
version=version)
def generate_pp(out, name, version):
util.render_template(out, 'pp.py')
def generate_util(out, name, version):
util.render_template(out, 'util.py', version=version)
def generate_bsn_tlv(out, name, version):
util.render_template(out, 'module.py',
ofclasses=modules_by_version[version]['bsn_tlv'],
version=version)
def init():
for version in loxi_globals.OFVersions.target_versions:
modules_by_version[version] = build_ofclasses(version)