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#!/usr/bin/env ruby
$: << ".." # Include .. in load path
require 'cppgen'
# Generate the full AMQP class/method model as C++ types.
class AmqpCppModelGen < CppGen
def initialize(outdir, amqp)
super(outdir, amqp)
end
def gen_set_variant(varname, idtype, pairs, errmsg)
pairs.sort!
scope("inline void setVariant(#{varname}& var, #{idtype} id) {") {
scope("switch (id) {") {
pairs.each { |i,t|
genl "case #{i}: var=#{t}(); break;";
}
genl "default: THROW_QPID_ERROR(FRAMING_ERROR, (boost::format(\"#{errmsg}\")%id).str());"
}
}
genl
end
def gen_class(c)
varname="#{c.name.caps}Variant"
mtypes=c.amqp_methods.map { |m| m.body_name }
typedef(blank_variant(mtypes), varname)
genl
pairs=c.amqp_methods.map { |m| [m.index.to_i,m.body_name] }
gen_set_variant(varname, "MethodId", pairs,
"%d is not a valid method index in class #{c.name}")
mtypes.each { |t|
genl "template<> struct ClassVariant<#{t}> { typedef #{varname} value; };"
}
genl
end
def gen_all()
varname="MethodVariant"
types=@amqp.amqp_classes.map { |c| "#{c.name.caps}Variant" }
pairs=@amqp.amqp_classes.map { |c| [c.index.to_i,"#{c.name.caps}Variant"] }
typedef(blank_variant(types), varname)
genl
gen_set_variant(varname, "ClassId", pairs,
"%d is not a valid class index.")
end
def generate()
h_file("qpid/framing/method_variants.h") {
@amqp.amqp_methods.each { |m| include "qpid/framing/#{m.body_name}.h"}
include "qpid/framing/amqp_types.h"
include "qpid/QpidError.h"
include "qpid/framing/variant.h"
include "<boost/format.hpp>"
genl
namespace("qpid::framing") {
genl "// Metafunction returns class variant containing method T."
genl "template <class T> struct ClassVariant {};"
genl
@amqp.amqp_classes.each { |c| gen_class c }
}
namespace("qpid::framing") {
gen_all
genl
}
}
end
end
AmqpCppModelGen.new(Outdir, Amqp).generate();
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