Class: RADProcessor

Inherits:
RubyToAnsiC
  • Object
show all
Defined in:
lib/rad/rad_processor.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.translate(file, klass, method) ⇒ Object

REFACTOR: rename to self.process



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# File 'lib/rad/rad_processor.rb', line 20

def self.translate file, klass, method
  sexp = RubyParser.new.process File.read(file), file
  sexp = s(:block, sexp) unless sexp.sexp_type == :block

  # this sucks... but it finds the class and method within the tree
  # it doesn't currently deal with class methods or anything special
  # AT ALL.

  k_sexp = sexp.find_nodes(:class).find { |k|
    k[1] == klass
  }

  body = k_sexp.scope
  body = body.block if body.block # RubyParser bug?

  m = body.find_nodes(:defn).find { |m|
    m[1] == method
  } rescue nil

  @translator = nil # HACK

  self.translator.process m if m
end

.translator ⇒ Object 



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# File 'lib/rad/rad_processor.rb', line 44

def self.translator
  unless @translator then
    @translator = CompositeSexpProcessor.new
    @translator << RADRewriter.new
    @translator << RADTypeChecker.new
    # HACK: more harm than good @translator << CRewriter.new
    @translator << self.new

    @translator.on_error_in(:defn) do |processor, exp, err|
      result = processor.expected.new
      case result
      when Array then
        result << :error
      end
      msg = "// ERROR: #{err.class}: #{err}"
      msg += " in #{exp.inspect}" unless exp.nil? or $TESTING
      msg += " from #{caller.join(', ')}" unless $TESTING
      result << msg
      result
    end

  end
  @translator
end

Instance Method Details

#process_iasgn(exp) ⇒ Object 



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# File 'lib/rad/rad_processor.rb', line 69

def process_iasgn(exp)
  name = exp.shift
  val = process exp.shift
  "__#{name.to_s.sub(/^@/, '')} = #{val}"
end

#process_iter(exp) ⇒ Object

Raises:

  • (UnsupportedNodeError) 


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# File 'lib/rad/rad_processor.rb', line 80

def process_iter(exp)
  # the array identifer may be in one of two locations
  # when using the instance variable (ivar) style it is located at exp[0][1][1]
  if exp[0][1][1]
    enum = exp[0][1][1]
    enum = "__#{enum.to_s.sub(/^@/, '')}" if enum.to_s =~ /^@/
  # for local variables it is located at exp[0][1][2]  
  elsif exp[0][1][2]
    enum = exp[0][1][2]
  end
  
  out = []
  # Only support enums in C-land # not sure if this comment if valid anymore
  raise UnsupportedNodeError if exp[0][1].nil? # HACK ugly
  @env.scope do
    
    call = process exp.shift
    var  = process(exp.shift).intern # semi-HACK-y 
    body = process exp.shift
    
    # array types from varible_processing>post_process_arrays and arduino_sketch>array
    $array_types.each do |k,v|
          @array_type = v if k == enum.to_s.sub(/^__/,"")
    end
    
    index_helper = $array_index_helpers.shift
    index = "index_#{index_helper}" # solves redeclaration issue

    body += ";" unless body =~ /[;}]\Z/
    body.gsub!(/\n\n+/, "\n")

    out << "unsigned int #{index};" # shouldn't need more than int
    out << "for (#{index} = 0; #{index} < (int) (sizeof(#{enum}) / sizeof(#{enum}[0])); #{index}++) {"   
    out << "#{@array_type} #{var} = #{enum}[#{index}];"
    out << body
    out << "}"
  end

  return out.join("\n")
end

#process_ivar(exp) ⇒ Object 



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# File 'lib/rad/rad_processor.rb', line 75

def process_ivar(exp)
  name = exp.shift
  "__#{name.to_s.sub(/^@/, '')}"
end

#process_lasgn(exp) ⇒ Object 



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# File 'lib/rad/rad_processor.rb', line 121

def process_lasgn(exp)
  out = ""
  var = exp.shift
  value = exp.shift # HACK FUCK || s(:array) # HACK?
  args = value

  exp_type = exp.sexp_type
  @env.add var.to_sym, exp_type
  var_type = self.class.c_type exp_type

  if exp_type.list? then
    assert_type args, :array

    raise "array must be of one type" unless args.sexp_type == Type.homo

    # HACK: until we figure out properly what to do w/ zarray
    # before we know what its type is, we will default to long.
    array_type = args.sexp_types.empty? ? 'void *' : self.class.c_type(args.sexp_types.first)
    # we can fix array here..
    args.shift # :arglist
    out << "#{var} = (#{array_type}) malloc(sizeof(#{array_type}) * #{args.length});\n"
    args.each_with_index do |o,i|
      out << "#{var}[#{i}] = #{process o};\n"
    end
  else
    out << "#{var}"
    out << " = #{process args}" if args
  end

  out.sub!(/;\n\Z/, '')

  return out
end

#process_str(exp) ⇒ Object 



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# File 'lib/rad/rad_processor.rb', line 155

def process_str(exp)
  s = exp.shift.gsub(/\n/, '\\n')
  if s.size == 1
    return "\'#{s}\'"
  else
    return "\"#{s}\""
  end
end