move builtin to register, where it belongs

lib/register/builtin/kernel.rb

@@ -0,0 +1,44 @@
+module Builtin
+  module Kernel
+    module ClassMethods
+      # main entry point, ie __init__ calls this
+      # defined here as empty, to be redefined
+      def main context
+        function = Virtual::CompiledMethod.new(:main , [] , Virtual::Integer)
+        return function
+      end
+      # this is the really really first place the machine starts.
+      # it isn't really a function, ie it is jumped to (not called), exits and may not return
+      # so it is responsible for initial setup (and relocation)
+      def __init__ context
+        function = Virtual::CompiledMethod.new(:__init__ , [] , Virtual::Integer)
+        clazz = Virtual::BootSpace.space.get_or_create_class :Kernel
+        method = clazz.resolve_method :main
+        me = Virtual::Self.new(Virtual::Reference)
+        code = Virtual::Set.new(Virtual::Self.new(me.type), me)
+        function.add_code(code)
+        function.add_code Virtual::MethodCall.new(method)
+        return function
+      end
+      def putstring context 
+        function = Virtual::CompiledMethod.new(:putstring , [] )
+        return function
+        ret = Virtual::RegisterMachine.instance.write_stdout(function)
+        function.set_return ret
+        function
+      end
+      def exit context
+        function = Virtual::CompiledMethod.new(:exit , [] , Virtual::Integer)
+        return function
+        ret = Virtual::RegisterMachine.instance.exit(function)
+        function.set_return ret
+        function
+      end
+      def __send context
+        function = Virtual::CompiledMethod.new(:__send , [] , Virtual::Integer)
+        return function
+      end
+    end
+    extend ClassMethods
+  end
+end