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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 os
import loxi_globals
import template_utils
import loxi_utils.loxi_utils as utils
import util
from loxi_ir import *
# 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 codegen(install_dir):
def render(name, template_name=None, **ctx):
if template_name is None:
template_name = os.path.basename(name)
with template_utils.open_output(install_dir, name) as out:
util.render_template(out, template_name, **ctx)
render('__init__.py', template_name='toplevel_init.py')
render('pp.py')
render('generic_util.py')
for version in loxi_globals.OFVersions.all_supported:
subdir = 'of' + version.version.replace('.', '')
modules = build_ofclasses(version)
render(os.path.join(subdir, '__init__.py'), template_name='init.py',
version=version, modules=modules.keys())
render(os.path.join(subdir, 'util.py'), version=version)
render(os.path.join(subdir, 'const.py'), version=version,
enums=loxi_globals.ir[version].enums)
args_by_module = {
'common': { 'extra_template' : '_common_extra.py' },
'message': { 'extra_template' : '_message_extra.py' },
}
for name, ofclasses in modules.items():
args = args_by_module.get(name, {})
render(os.path.join(subdir, name + '.py'), template_name='module.py',
version=version, ofclasses=ofclasses, modules=modules.keys(),
**args)