Module: ExternalVariableProcessing

Included in:
ArduinoSketch
Defined in:
lib/rad/variable_processing.rb

Instance Method Summary collapse

Instance Method Details

#c_type(typ) ⇒ Object 



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# File 'lib/rad/variable_processing.rb', line 135

def c_type(typ)
  type = 
    case typ 
    when Integer
      "int"
    when String
      "char*"
    when TrueClass
      "bool"
    when FalseClass
      "bool"
    else
      raise "Bug! Unknown type #{typ.inspect} in c_type"
    end

    type
end

#check_variable_type(type) ⇒ Object 



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# File 'lib/rad/variable_processing.rb', line 129

def check_variable_type(type)
  unless type =~ /#{C_VAR_TYPES}/
    raise ArgumentError, "the following variable types are supported \n #{C_VAR_TYPES.gsub("|",", ")} got #{type}" 
  end
end

#post_process_arrays(name, var) ⇒ Object 



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# File 'lib/rad/variable_processing.rb', line 120

def post_process_arrays(name, var)
  type = c_type(var[0])
  $array_types[name] = type
  assignment = var.inspect.gsub("[","{").gsub("]","}")      
  c_style_array = "#{type} __#{name}[] = #{assignment};"
  $external_var_identifiers << "__#{name}" unless $external_var_identifiers.include?("__#{name}")
  $external_array_vars << c_style_array unless $external_array_vars.include?(c_style_array)
end

#post_process_vars(name, type, value = nil) ⇒ Object 



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# File 'lib/rad/variable_processing.rb', line 114

def post_process_vars(name, type, value = nil)
  value = " = #{value}" if value 
  $external_var_identifiers << "__#{name}" unless $external_var_identifiers.include?("__#{name}")
  $external_vars << "#{type} __#{name}#{value};"
end

#pre_process_vars(name, var) ⇒ Object 



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# File 'lib/rad/variable_processing.rb', line 24

def pre_process_vars(name, var)
    # puts 
    # puts
    case var
    when Integer
      # puts "pre_process: #{name}, #{var}, #{var.inspect} got #{var.class} 29"
      value = var
      type = "int"
      post_process_vars(name, type, value)
    when Float
      # puts "pre_process: #{name}, #{var}, #{var.inspect} got #{var.class} 34"
      value = var
      type = "float"
      post_process_vars(name, type, value)
    when String
      # puts "pre_process: #{name}, #{var.inspect} got #{var.class} on 39"
      if var.match(",").nil? && var =~ /long|byte|unsigned|int|short/
        # puts "pre_process #{name}, #{var.inspect} got #{var.class} level three sublevel"
        type = var
        value = nil
        post_process_vars(name, type, value)
      else
        value = var.split(",").first.lstrip
        type = var.split(",")[1].nil? ?  nil : var.split(",")[1].lstrip
        translate_variables( name , type, value )
      end
    when TrueClass
      # puts "pre_process: #{name}, #{var}, #{var.inspect} got #{var.class} on 50"
      value = 1
      type = "bool"
      post_process_vars(name, type, value)
    when FalseClass
      # puts "pre_process: #{name}, #{var}, #{var.inspect} got #{var.class} on 55"
      value = 0
      type = "bool"
      post_process_vars(name, type, value)
    when Array
      post_process_arrays(name, var)
    else
      raise ArgumentError, "not sure what to do here...  got #{name} with value #{var} which is a #{var.class}" 
    end      
end

#process_external_vars(klass) ⇒ Object

need to clean this up need to test



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# File 'lib/rad/variable_processing.rb', line 9

def process_external_vars(klass)
  vars = eval "#{klass}.instance_variables"
  local_vars = []
  vars.each { |v| local_vars << ":#{v.gsub("@", "")}" }
  loc_vars = local_vars.join(", ")
  # add accessors 
  klass.module_eval "class << self; attr_accessor #{loc_vars} end"
  local_vars.each do |symbol|
    name = symbol.gsub(":","")
    t_var = eval "#{klass}.#{name}"
    pre_process_vars(name, t_var)
  end
end

#translate_variables(name, type = nil, value = nil) ⇒ Object 



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# File 'lib/rad/variable_processing.rb', line 68

def translate_variables(name, type = nil, value = nil)
  
  unless type.nil?
    check_variable_type(type)
  end

  # classify the values
  if value.class == Fixnum 
    # puts "translate_variables: #{name}, #{value}, #{type} is a fixnum, got #{value.class} on 74"
  elsif value.class == Float 
    # puts "translate_variables: #{name}, #{value}, #{type} is a float, got #{value.class} on 76"
  elsif value =~ /^-(\d|x)*$/ 
    value = value.to_i
    type = "int" if type.nil?
  elsif value =~ /^-(\d|\.|x)*$/ 
    value = value.to_f
    unless type.nil?
      raise ArgumentError, "#{value} should be a float got  #{type}" unless type == "float"
    end
    type = "float" if type.nil?   

  elsif value[0,1] !~ /\d/
    # puts value[0,1]
    # puts "translate_variables: #{name}, #{value}, #{type} is a number of some type, got #{value.class} on 79"
    type = "char*"
    value = "\"#{value}\""
  elsif value !~ /(\.|x)/
    # puts "translate_variables: #{name}, #{value}, #{type} is an integer, got #{value.class} on 83"
    value = value.to_i
    type = "int" if type.nil?
  elsif value =~ /(\d*\.\d*)/ # and no 
    # puts "translate_variables: #{name}, #{value}, #{type} is a float, got #{value.class} on 87"
    value = value.to_f
    type = "float"
  elsif value =~ /0x\d\d/
    # puts "translate_variables: #{name}, #{value}, #{type} is a byte, got #{value.class} on 91"
    type = "byte"
  else
    raise ArgumentError, "not sure what to do with a value of #{value} with a type like #{type}" 
  end
 
  post_process_vars(name, type, value)
end