Class: IDL::Engine

Inherits:
Object
  • Object
show all
Defined in:
lib/ridl/runner.rb

Instance Method Summary collapse

Constructor Details

#initialize(backend, options) ⇒ Engine

Returns a new instance of Engine.



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# File 'lib/ridl/runner.rb', line 44

def initialize(backend, options)
  @backend = backend ? Backend.load(backend) : Backend.null_be
  @initopts = options.merge({
    backend: @backend.name,
    macros: options[:macros].merge({
       __RIDLBE__: @backend.name.to_s,
       __RIDLBE_VER__: @backend.version
    })
  })
  @optparser = init_optparser
  @inputstack = []
  @options = nil
end

Instance Method Details

#backend ⇒ Object 



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# File 'lib/ridl/runner.rb', line 58

def backend
  @backend
end

#has_input? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ridl/runner.rb', line 78

def has_input?
  !@inputstack.empty?
end

#options ⇒ Object 



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# File 'lib/ridl/runner.rb', line 62

def options
  @options || @initopts
end

#parse(io, opts) ⇒ Object 



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# File 'lib/ridl/runner.rb', line 168

def parse(io, opts)
  # parse IDL source
  _parser = ::IDL::Parser.new(opts)
  _parser.yydebug = opts[:debug]

  begin
    _parser.parse(io)
  rescue => ex
    IDL.error(ex.inspect)
    IDL.error(ex.backtrace.join("\n")) unless ex.is_a? IDL::ParseError
    return nil
  ensure
    io.close unless String === io || io == $stdin
  end
  _parser
end

#peek_input ⇒ Object 



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# File 'lib/ridl/runner.rb', line 74

def peek_input
  @inputstack.first
end

#pop_input ⇒ Object 



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# File 'lib/ridl/runner.rb', line 70

def pop_input
  @inputstack.shift
end

#push_input(idlfile, opts) ⇒ Object 



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# File 'lib/ridl/runner.rb', line 66

def push_input(idlfile, opts)
  @inputstack << [idlfile, opts]
end

#run(argv, runopts = {}) ⇒ Object 



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# File 'lib/ridl/runner.rb', line 90

def run(argv, runopts = {})

  # initialize options
  @options = @initopts.merge(runopts)

  # backup current engine (if any)
  cur_engine = Thread.current[:ridl_engine]
  # store currently running engine for current thread
  Thread.current[:ridl_engine] = self

  begin
    # parse arguments
    begin
      @optparser.parse!(argv)
    rescue ArgumentError => ex
      IDL.error(ex.inspect)
      IDL.error(ex.backtrace.join("\n")) if IDL.verbose_level>0
      return false
    end

    if options[:preprocess]

      ## PREPROCESSING
      o = if options[:output].nil?
            $stdout
          else
            File.open(options[:output], 'w+')
          end
      options[:output] = o

      input_base = File.basename(argv.first)
      if (input_base != argv.first)
        options[:xincludepaths] << File.dirname(argv.first)
      end

      return !parse("#include \"#{input_base}\"", options).nil?
    else
      ## collect input files from commandline
      collect_input(argv)

      ## CODE GENERATION
      while has_input?
        # get input from stack
        _idlfile, _opts = pop_input

        _fio = if IO === _idlfile || StringIO === _idlfile
                 _idlfile
               else
                 File.open(_idlfile, 'r')
               end
        raise RuntimeError, 'cannot read from STDOUT' if $stdout == _fio

        # parse IDL source
        IDL.log(1, "RIDL - parsing #{IO === _idlfile ? 'from STDIN': (StringIO === _idlfile ? 'from string' : _idlfile)}")

        unless _parser = parse(_fio, _opts)
          return false
        end

        # process parse result -> code generation
        IDL.log(2, 'RIDL - starting code generation')

        GenFile.transaction  do
          begin
            backend.process_input(_parser, _opts)
          rescue Backend::ProcessStop
            IDL.log(2, "RIDL - processing #{IO === _idlfile ? 'from STDIN': (StringIO === _idlfile ? 'from string' : _idlfile)} stopped with \"#{$!.message}\"")
          end
        end
      end
    end
  ensure
    # restore previous state
    Thread.current[:ridl_engine] = cur_engine
  end
  true
end

#verbose_level ⇒ Object 



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# File 'lib/ridl/runner.rb', line 82

def verbose_level
  options[:verbose]
end

#verbose_level=(l) ⇒ Object 



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# File 'lib/ridl/runner.rb', line 86

def verbose_level=(l)
  options[:verbose] = l
end