| #!/usr/bin/env ruby |
| # |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # 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 License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| # |
| $: << ".." # Include .. in load path |
| require 'cppgen' |
| |
| class MethodHolderGen < CppGen |
| |
| def initialize(outdir, amqp) |
| super(outdir, amqp) |
| @namespace="qpid::framing" |
| @classname="BodyHolder" |
| @filename="qpid/framing/BodyHolder" |
| end |
| |
| def gen_max_size() |
| # Generate program to generate MaxSize.h |
| cpp_file("generate_MaxMethodBodySize_h") { |
| include "qpid/framing/AMQHeaderBody" |
| include "qpid/framing/AMQContentBody" |
| include "qpid/framing/AMQHeartbeatBody" |
| @amqp.methods_.each { |m| include "qpid/framing/#{m.body_name}" } |
| genl |
| include "<algorithm>" |
| include "<fstream>" |
| genl |
| genl "using namespace std;" |
| genl "using namespace qpid::framing;" |
| genl |
| scope("int main(int, char** argv) {") { |
| genl "size_t maxSize=0;" |
| genl "maxSize=max(maxSize, sizeof(AMQHeaderBody));" |
| genl "maxSize=max(maxSize, sizeof(AMQContentBody));" |
| genl "maxSize=max(maxSize, sizeof(AMQHeartbeatBody));" |
| @amqp.methods_.each { |m| |
| genl "maxSize=max(maxSize, sizeof(#{m.body_name}));" } |
| gen <<EOS |
| ofstream out("qpid/framing/MaxMethodBodySize.h"); |
| out << "// GENERATED CODE: generated by " << argv[0] << endl; |
| out << "namespace qpid{ namespace framing { " << endl; |
| out << "const size_t MAX_METHOD_BODY_SIZE=" << maxSize << ";" << endl; |
| out << "}}" << endl; |
| EOS |
| } |
| } |
| end |
| |
| def gen_construct |
| cpp_file(@filename+"_gen") { |
| include @filename |
| include "qpid/framing/AMQHeaderBody" |
| include "qpid/framing/AMQContentBody" |
| include "qpid/framing/AMQHeartbeatBody" |
| @amqp.methods_.each { |m| include "qpid/framing/#{m.body_name}" } |
| include "qpid/framing/FrameDefaultVisitor.h" |
| include "qpid/Exception.h" |
| genl |
| namespace(@namespace) { |
| scope("void #{@classname}::setMethod(ClassId c, MethodId m) {") { |
| scope("switch (c) {") { |
| @amqp.classes.each { |c| |
| scope("case #{c.code}: switch(m) {") { |
| c.methods_.each { |m| |
| genl "case #{m.code}: blob = in_place<#{m.body_name}>(); break;" |
| } |
| genl "default: throw Exception(QPID_MSG(\"Invalid method id \" << int(m) << \" for class #{c.name} \"));" |
| } |
| genl "break;" |
| } |
| genl "default: throw Exception(QPID_MSG(\"Invalid class id \" << int(c)));" |
| } |
| } |
| |
| struct("CopyVisitor", "public FrameDefaultVisitor") { |
| genl "using FrameDefaultVisitor::visit;" |
| genl "using FrameDefaultVisitor::defaultVisit;" |
| genl "BodyHolder& holder;" |
| genl "CopyVisitor(BodyHolder& h) : holder(h) {}" |
| ["Header", "Content", "Heartbeat"].each { |type| |
| genl "void visit(const AMQ#{type}Body& x) { holder=x; }" |
| } |
| @amqp.methods_.each { |m| |
| genl "void visit(const #{m.body_name}& x) { holder=x; }" |
| } |
| genl "void defaultVisit(const AMQBody&) { assert(0); }" |
| } |
| genl |
| |
| scope("void BodyHolder::setBody(const AMQBody& b) {") { |
| genl "CopyVisitor cv(*this); b.accept(cv);" |
| } |
| }} |
| end |
| |
| def generate |
| gen_max_size |
| gen_construct |
| end |
| end |
| |
| MethodHolderGen.new($outdir, $amqp).generate(); |
| |