Rich Lane | bdd8e29 | 2013-12-06 17:37:39 -0800 | [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 | Code generation |
| 30 | |
| 31 | These functions extract data from the IR and render templates with it. |
| 32 | """ |
| 33 | |
| 34 | from collections import namedtuple |
| 35 | from itertools import groupby |
| 36 | import template_utils |
| 37 | import loxi_globals |
| 38 | import loxi_ir.ir as ir |
| 39 | import util |
| 40 | |
| 41 | PushWireTypesFn = namedtuple('PushWireTypesFn', |
| 42 | ['class_name', 'versioned_type_members']) |
| 43 | PushWireTypesMember = namedtuple('PushWireTypesMember', |
| 44 | ['name', 'offset', 'length', 'value']) |
| 45 | |
| 46 | def gen_push_wire_types(install_dir): |
| 47 | fns = [] |
| 48 | for uclass in loxi_globals.unified.classes: |
| 49 | if uclass.virtual or not uclass.has_type_members: |
| 50 | continue |
| 51 | |
| 52 | # Generate a dict of version -> list of PushWireTypesMember |
| 53 | type_members_by_version = {} |
| 54 | for version, ofclass in sorted(uclass.version_classes.items()): |
| 55 | pwtms = [] |
| 56 | for m in ofclass.members: |
| 57 | if isinstance(m, ir.OFTypeMember): |
| 58 | if m.name == "version" and m.value == version.wire_version: |
| 59 | # Special case for version |
| 60 | pwtms.append(PushWireTypesMember(m.name, m.offset, m.length, "obj->version")) |
| 61 | else: |
| 62 | pwtms.append(PushWireTypesMember(m.name, m.offset, m.length, m.value)) |
| 63 | type_members_by_version[version] = pwtms |
| 64 | |
| 65 | # Merge versions with identical type members |
| 66 | all_versions = sorted(type_members_by_version.keys()) |
| 67 | versioned_type_members = [] |
| 68 | for pwtms, versions in groupby(all_versions, type_members_by_version.get): |
| 69 | versioned_type_members.append((pwtms, list(versions))) |
| 70 | |
| 71 | fns.append(PushWireTypesFn( |
| 72 | class_name=uclass.name, |
| 73 | versioned_type_members=versioned_type_members)) |
| 74 | |
| 75 | with template_utils.open_output(install_dir, "loci/src/loci_push_wire_types.c") as out: |
| 76 | util.render_template(out, "loci_push_wire_types.c", fns=fns) |
| 77 | |
| 78 | with template_utils.open_output(install_dir, "loci/src/loci_push_wire_types.h") as out: |
| 79 | util.render_template(out, "loci_push_wire_types.h", fns=fns) |