work on jump insertion continues

Now registering CodeListener instead of PositionListener
Also instead of on the previous, in itself, which is simpler
and allows to react to insertion at end

lib/parfait/binary_code.rb

@@ -39,11 +39,7 @@ module Parfait
 
     def extend_one()
       @next = BinaryCode.new(1)
-      if Risc::Position.set?(self)
-        Risc::Position.log.debug "extending one in #{self}"
-        my_pos = Risc::Position.get(self)
-        Risc::CodeListener.init( @next , my_pos + self.padded_length)
-      end
+      Risc::Position.get(self).trigger_inserted if Risc::Position.set?(self)
     end
 
     def ensure_next

lib/risc/machine.rb

@@ -121,7 +121,8 @@ module Risc
       Parfait.object_space.types.values.each do |type|
         next unless type.methods
         type.methods.each_method do |method|
-          last_code = CodeListener.init(method.binary , code_start)
+          last_code = CodeListener.init(method.binary)
+          last_code.set(code_start)
           first_position = InstructionListener.init(method.cpu_instructions, method.binary)
           first_position.set( code_start + Parfait::BinaryCode.byte_offset)
           last_code.position_listener( prev_code.object) if prev_code

lib/risc/position/code_listener.rb

@@ -9,15 +9,8 @@ module Risc
   #
   class CodeListener
 
-    attr_reader :code , :method
-
-    def initialize(code , method)
-      super(code,pos)
-      @code = code
-      @method = method
-      raise "Method nil" unless method
-    end
     def set(at)
+      raise "Called"
       next_pos = at + code.padded_length
       if code.next
         Position.set(code.next , next_pos, method)
@@ -33,7 +26,9 @@ module Risc
 
     # insert a jump to the next instruction, at the last instruction
     # thus hopping over the object header
-    def set_jump(at)
+    def set_jump_for(position)
+      at = position.at
+      code = position.object
       jump = Branch.new("BinaryCode #{at.to_s(16)}" , code.next)
       translator = Risc.machine.platform.translator
       cpu_jump = translator.translate(jump)
@@ -42,20 +37,31 @@ module Risc
       cpu_jump.assemble(JumpWriter.new(code))
     end
 
+    def position_inserted(position)
+      Position.log.debug "extending one in #{self}"
+      pos = CodeListener.init( position.object.next )
+      pos.set( position + position.object.padded_length)
+      return unless position.valid?
+      set_jump_for(position)
+    end
+
+    def position_changed(position)
+      return unless position.object.next
+      raise "Called"
+    end
+
     # Create Position for the given BinaryCode object
-    # return the last position that was created, for chaining
-    def self.init( code , at = -1)
+    # return the first position that was created, to set it
+    def self.init( code )
+      first = nil
       while code
         raise "Not Binary Code #{code.class}" unless code.is_a?(Parfait::BinaryCode)
-        position = Position.new(code , at)
-        if code.next
-          listener = PositionListener.new(code.next)
-          position.position_listener( listener)
-        end
-        at += code.padded_length unless at < 0
+        position = Position.new(code , -1)
+        first = position unless first
+        position.position_listener(CodeListener.new)
         code = code.next
       end
-      position
+      first
     end
   end
 end

test/risc/position/test_code_listener.rb

@@ -20,16 +20,19 @@ module Risc
     def test_init_returns_position
       assert_equal Position , CodeListener.init(@binary).class
     end
+    def test_not_init_listner
+      pos = CodeListener.init(@binary)
+      assert CodeListener == pos.event_table[:position_changed].last.class
+    end
     def test_init_listner
       @binary.extend_one
       CodeListener.init(@binary)
       pos = Position.get(@binary)
-      assert !pos.event_table[:position_changed].empty?
+      assert_equal CodeListener , pos.event_table[:position_changed].first.class
     end
-    def test_not_init_listner
+    def test_extends_creates_jump
+      @binary.extend_one
       CodeListener.init(@binary)
-      pos = Position.get(@binary)
-      assert pos.event_table[:position_changed].empty?
     end
   end
 end

test/risc/position/test_code_listener1.rb

@@ -0,0 +1,26 @@
+require_relative "helper"
+
+module Risc
+  # tests that require a boot and test propagation
+  class TestCodeListenerFull < MiniTest::Test
+    def setup
+      Risc.machine.boot
+      @binary = Parfait::BinaryCode.new(1)
+      @method = Parfait.object_space.types.values.first.methods
+      @label = Risc.label("hi","ho")
+      @machine.translate(:arm)
+      @machine.position_all
+    end
+    def test_listener_after_extend
+      CodeListener.init(@binary).set(0)
+      @binary.extend_one
+      pos = Position.get(@binary.next)
+      assert_equal CodeListener , pos.event_table[:position_changed].first.class
+    end
+    def test_extend_sets_next_pos
+      CodeListener.init(@binary).set(0)
+      @binary.extend_one
+      assert Position.get(@binary.next)
+    end
+  end
+end