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#!/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'
# Dummy element representing an unknown struct type.
class UnknownStruct
def visitable?() true end
def fqclassname() "UnknownStruct" end
end
# Dummy element representing a session.header field
class SessionHeaderField
def amqp2cpp() "session::Header" end
def cppname() "sessionHeader" end
def name() "session-header" end
end
class Specification < CppGen
def initialize(outdir, amqp)
super(outdir, amqp)
@ns="qpid::amqp_#{@amqp.version.bars}"
@dir="qpid/amqp_#{@amqp.version.bars}"
end
# domains
def domain_h(d)
genl
typename=d.name.typename
if d.enum
scope("enum #{typename} {", "};") {
genl d.enum.choices.map { |c|
"#{c.name.constname} = #{c.value}" }.join(",\n")
}
scope("inline SerializeAs<#{typename}, uint8_t> serializable(#{typename}& e) {") {
genl "return SerializeAs<#{typename}, uint8_t>(e);"
}
else
genl "typedef #{d.amqp2cpp} #{typename};"
end
end
def visitable?(x) x.code and x.size=="4" end
# Used by structs, commands and controls.
def action_struct_h(x, base, consts, &block)
genl
base = visitable?(x) ? ["public #{base}"] : []
struct(x.classname, *base) {
x.fields.each { |f| genl "#{f.amqp2cpp} #{f.cppname};" }
genl
genl "static const char* NAME;"
consts.each {
|c| genl "static const uint8_t #{c.upcase}=#{(x.send c) or 0};"
}
genl "static const uint8_t CLASS_CODE=#{x.containing_class.nsname}::CODE;"
genl "static const char* CLASS_NAME;"
ctor_decl("explicit #{x.classname}", x.parameters(true))
if visitable? x
genl "void accept(Visitor&);"
genl "void accept(ConstVisitor&) const;"
end
if (x.fields.empty?)
genl "template <class S> void serialize(S&) {}"
else
scope("template <class S> void serialize(S& s) {") {
gen "s"; x.fields.each { |f| gen "(#{f.cppname})"}; genl ";"
}
end
genl
yield if block
}
case x
when AmqpCommand then packer = "CommandPacker"
when AmqpControl then packer = "Packer"
when AmqpStruct then packer = "SizedPacker"
end
genl "inline #{packer}<#{x.classname}> serializable(#{x.classname}& x) { return #{packer}<#{x.classname}>(x); }" unless x.respond_to? :pack and x.pack == "0"
genl "std::ostream& operator << (std::ostream&, const #{x.classname}&);"
genl "bool operator==(const #{x.classname}&, const #{x.classname}&);"
end
def action_struct_cpp(x, &block)
genl
genl "const char* #{x.classname}::NAME=\"#{x.fqname}\";"
genl "const char* #{x.classname}::CLASS_NAME=#{x.containing_class.nsname}::NAME;"
genl
ctor=x.classname+"::"+x.classname
ctor_defn(ctor, x.parameters, x.initializers) {}
if visitable? x
genl "void #{x.classname}::accept(Visitor& v) { v.visit(*this); }"
genl "void #{x.classname}::accept(ConstVisitor& v) const { v.visit(*this); }"
end
genl
scope("std::ostream& operator << (std::ostream& o, const #{x.classname}&#{"x" unless x.fields.empty?}) {") {
genl "o << \"#{x.fqname}[\";";
x.fields.each{ |f| genl "o << \" #{f.name}=\" << x.#{f.cppname};" }
genl "o << \"]\";"
genl "return o;"
}
yield if block
end
# structs
def struct_h(s) action_struct_h(s, "Struct", ["size","pack","code"]); end
def struct_cpp(s) action_struct_cpp(s) end
# command and control
def action_h(a)
action_struct_h(a, a.base, ["code"]) {
struct("Handler") {
scope("void #{a.funcname}(", ");") {
genl a.parameters.join(",\n")
}
}
function_defn("template <class T> void invoke", ["T& target"], "const") {
genl "target.#{a.funcname}(#{a.values.join(', ')} );"
}
}
end
def action_cpp(a)
action_struct_cpp(a) {
scope("void #{a.classname}::Handler::#{a.funcname}(", ")") {
genl a.unused_parameters.join(",\n")
}
scope {
genl "assert(0);"
genl "throw NotImplementedException(QPID_MSG(\"#{a.fqname} not implemented.\"));"
}
}
end
# Types that must be generated early because they are used by other types.
def pregenerate?(x) not @amqp.used_by[x.fqname].empty?; end
def pregenerate_class?(c)
c.children.select{ |t| (t.is_a? AmqpStruct or t.is_a? AmqpDomain) and pregenerate? t}
end
# Typedefs, enums and forward declarations for classes.
def gen_specification_fwd()
h_file("#{@dir}/specification_fwd") {
include "#{@dir}/built_in_types"
namespace(@ns) {
# Top level
@amqp.domains.each { |d|
# segment-type and track are are built in
domain_h d unless ["track","segment-type"].include?(d.name)
}
each_class_ns { |c|
genl "const uint8_t CODE=#{c.code};" # class code
genl "extern const char* NAME;"
c.each_descendant { |x|
case x
when AmqpDomain then domain_h x
when AmqpStruct then genl "class #{x.classname};"
when AmqpAction then genl "class #{x.classname};"
end
}
}
}
}
end
# Generate struct definitions into a separate header file so the
# can be included by StructHolder.h without circularity.
def gen_structs()
h_file("#{@dir}/structs") {
include "#{@dir}/specification_fwd"
include "#{@dir}/Map.h"
include "#{@dir}/Array.h"
include "#{@dir}/Struct.h"
include "#{@dir}/UnknownStruct.h"
include "#{@dir}/Packer.h"
namespace(@ns) {
each_class_ns { |c|
c.collect_all(AmqpStruct).each { |s| struct_h s }
}
}
}
cpp_file("#{@dir}/structs") {
include "#{@dir}/structs"
include "#{@dir}/StructHolder"
namespace(@ns) {
each_class_ns { |c|
c.collect_all(AmqpStruct).each { |s| struct_cpp(s) }
}
}
}
end
# Generate the specification files
def gen_specification()
h_file("#{@dir}/specification") {
include "#{@dir}/specification_fwd.h"
include "#{@dir}/Map.h"
include "#{@dir}/Array.h"
include "#{@dir}/UnknownType.h"
include "#{@dir}/Struct32"
include "#{@dir}/Control.h"
include "#{@dir}/Command.h"
include "#{@dir}/Packer.h"
include "<iosfwd>"
namespace(@ns) {
each_class_ns { |c|
c.collect_all(AmqpAction).each { |a| action_h a }
}
}}
cpp_file("#{@dir}/specification") {
include "#{@dir}/specification"
include "#{@dir}/exceptions"
include "<iostream>"
["Command","Control", "Struct"].each { |x| include "#{@dir}/Apply#{x}" }
namespace(@ns) {
each_class_ns { |c|
genl "const char* NAME=\"#{c.fqname}\";"
c.actions.each { |a| action_cpp a}
}
}
}
end
def gen_proxy()
h_file("#{@dir}/ProxyTemplate.h") {
include "#{@dir}/specification"
namespace(@ns) {
genl "template <class F, class R=typename F::result_type>"
cpp_class("ProxyTemplate") {
public
genl "ProxyTemplate(F f=F()) : functor(f) {}"
@amqp.classes.each { |c|
c.actions.each { |a|
genl
function_defn("R #{a.funcname}", a.parameters) {
var=a.name.funcname
args = a.arguments.empty? ? "" : "("+a.arguments.join(", ")+")"
genl("#{a.fqclassname} #{var}#{args};")
genl "return functor(#{var});"
}
}
}
private
genl "F functor;"
}
}
}
end
def visitor_interface_h(base, subs, is_const)
name="#{is_const ? 'Const' : ''}#{base}Visitor"
const=is_const ? "const " : ""
struct(name) {
genl "virtual ~#{name}() {}"
genl "typedef #{const}#{base} BaseType;"
subs.each{ |s|
genl "virtual void visit(#{const}#{s.fqclassname}&) = 0;"
}}
end
def visitor_impl(base, subs, is_const)
name="#{is_const ? 'Const' : ''}#{base}Visitor"
const=is_const ? "const " : ""
genl "template <class F>"
struct("ApplyVisitor<#{name}, F>", "public ApplyVisitorBase<#{name}, F>") {
subs.each{ |s|
genl "virtual void visit(#{const}#{s.fqclassname}& x) { this->invoke(x); }"
}}
end
def gen_visitor(base, subs)
h_file("#{@dir}/#{base}Visitor.h") {
include base=="Struct" ? "#{@dir}/structs" : "#{@dir}/specification"
namespace("#{@ns}") {
visitor_interface_h(base, subs, false)
visitor_interface_h(base, subs, true)
}}
h_file("#{@dir}/Apply#{base}.h") {
include "#{@dir}/#{base}Visitor.h"
include "#{@dir}/apply.h"
namespace("#{@ns}") {
visitor_impl(base, subs, false)
visitor_impl(base, subs, true)
}
}
end
def gen_holder(base, subs)
name=base+"Holder"
h_file("#{@dir}/#{name}") {
include "#{@dir}/Apply#{base}"
include "#{@dir}/Holder"
include base=="Struct" ? "#{@dir}/structs" : "#{@dir}/specification"
namespace(@ns){
namespace("#{base.downcase}_max") {
genl "static const size_t MAX000=0;"
last="MAX000"
subs.each { |s|
sizeof="sizeof(#{s.fqclassname})"
genl "static const size_t #{last.succ} = #{sizeof} > #{last} ? #{sizeof} : #{last};"
last.succ!
}
genl "static const int MAX=#{last};"
}
holder_base="amqp_0_10::Holder<#{name}, #{base}, #{base.downcase}_max::MAX>"
struct("#{name}", "public #{holder_base}") {
genl "#{name}() {}"
genl "template <class T> explicit #{name}(const T& t) : #{holder_base}(t) {}"
genl "using #{holder_base}::operator=;"
genl "void set(uint8_t classCode, uint8_t code);"
}
genl
genl "std::ostream& operator<<(std::ostream& o, const #{name}& h);"
}
}
cpp_file("#{@dir}/#{name}") {
include "#{@dir}/#{name}"
include "#{@dir}/exceptions.h"
namespace(@ns) {
genl "using framing::in_place;"
genl
scope("void #{name}::set(uint8_t classCode, uint8_t code) {") {
genl "uint16_t key=(classCode<<8)+code;"
scope ("switch(key) {") {
subs.each { |s|
genl "case 0x#{s.full_code.to_s(16)}: *this=in_place<#{s.fqclassname}>(); break;" unless (s.is_a? UnknownStruct)
}
genl "default: "
indent {
if (base=="Struct")
genl "*this=in_place<UnknownStruct>(classCode, code);"
else
genl "throw CommandInvalidException(QPID_MSG(\"Invalid class-#{base.downcase} key \" << std::hex << key));"
end
}
}
}
genl
genl "std::ostream& operator<<(std::ostream& o, const #{name}& h) { return h.get() ? (o << *h.get()) : (o << \"<empty #{name}>\"); }"
}
}
end
def gen_visitable(base, subs)
subs << UnknownStruct.new if base=="Struct" # Extra case for unknown structs.
gen_holder(base, subs)
gen_visitor(base, subs)
end
def generate
gen_specification_fwd
gen_specification
gen_proxy
gen_structs
gen_visitable("Command", @amqp.collect_all(AmqpCommand))
gen_visitable("Control", @amqp.collect_all(AmqpControl))
gen_visitable("Struct", @amqp.collect_all(AmqpStruct).select { |s| s.code})
end
end
Specification.new($outdir, $amqp).generate();
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