Class: GCoder::Parser

Inherits:
Object show all
Defined in:
lib/gcoder/parser.rb

Instance Method Summary collapse

Instance Method Details

#parse(code, dialect = GCoder::Dialects::default) ⇒ Object

Rudimentary GCode parser that also maps the commands to their respective classes according to the dialect.

Returns a GCode::Program containing the commands.



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# File 'lib/gcoder/parser.rb', line 11

def parse(code, dialect = GCoder::Dialects::default)
  code = code.split("\n") unless code.is_a? Array

  commands = code.map do |caa|
    r = nil
    caa.strip!
    unless caa.empty?
      cmd, *args = caa.strip.split(" ")
      root_code = cmd[0...1]
      child_code = cmd[1..-1]
      args = args.inject({}) {|m,e| m[e[0...1].to_sym] = e[1..-1]; m }

      if root_code == '('
        r = GCoder::GCode::Comment.new(caa.strip[1...-1], {})
      else
        commands = dialect[root_code.to_sym]
        throw "Dialect does not support #{root_code} commands" if commands.nil?

        unless child_code.nil? or child_code.empty?
          cmd_class = commands[child_code.to_i]
          throw "Dialect does not support command: #{child_code}" if cmd_class.nil?

          r = eval("GCoder::GCode::#{cmd_class}").new(cmd, args)
        end
      end
    end
    r
  end.compact

  GCode::Program.new(commands)
end