From 0731e05211ff5e47e6a8b2c006bd6012da5cc161 Mon Sep 17 00:00:00 2001
From: Alan Conway <aconway@apache.org>
Date: Wed, 27 Feb 2008 16:37:48 +0000
Subject: Generate code for both 0-99 preview and 0-10 final specs . 0-10
 final: extended code generation and non-generated support classes.

git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/trunk/qpid@631638 13f79535-47bb-0310-9956-ffa450edef68
---
 cpp/rubygen/99-0/MethodHolder.rb | 100 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100755 cpp/rubygen/99-0/MethodHolder.rb

(limited to 'cpp/rubygen/99-0/MethodHolder.rb')

diff --git a/cpp/rubygen/99-0/MethodHolder.rb b/cpp/rubygen/99-0/MethodHolder.rb
new file mode 100755
index 0000000000..a708db6676
--- /dev/null
+++ b/cpp/rubygen/99-0/MethodHolder.rb
@@ -0,0 +1,100 @@
+#!/usr/bin/env ruby
+$: << ".."                      # 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.index}: switch(m) {") {
+                c.methods_.each { |m|
+                  genl "case #{m.index}: 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();
+
-- 
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