Class: FastRuby::Context

Inherits:
Object show all
Defined in:
lib/fastruby/translator/translator.rb,
lib/fastruby/translator/modules/call.rb,
lib/fastruby/translator/modules/defn.rb,
lib/fastruby/translator/modules/flow.rb,
lib/fastruby/translator/modules/iter.rb,
lib/fastruby/translator/modules/block.rb,
lib/fastruby/translator/modules/static.rb,
lib/fastruby/translator/modules/literal.rb,
lib/fastruby/translator/modules/logical.rb,
lib/fastruby/translator/modules/nonlocal.rb,
lib/fastruby/translator/modules/variable.rb,
lib/fastruby/translator/modules/directive.rb,
lib/fastruby/translator/modules/exceptions.rb,
lib/fastruby/translator/modules/method_group.rb

Defined Under Namespace

Classes: Value

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(common_func = true) ⇒ Context

Returns a new instance of Context.



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# File 'lib/fastruby/translator/translator.rb', line 110

def initialize(common_func = true)
  initialize_to_c
  
  @catch_blocks = []
  @infer_lvar_map = Hash.new
  @no_cache = false
  @extra_code = ""
  @options = {}
  @init_extra = Array.new
  @frame_struct = "struct {
    void* parent_frame;
    void* plocals;
    jmp_buf jmp;
    VALUE return_value;
    int rescue;
    VALUE last_error;
    VALUE next_recv;
    int targetted;
    struct FASTRUBYTHREADDATA* thread_data;
  }"

  @block_struct = "struct {
    void* block_function_address;
    void* block_function_param;
    VALUE proc;
  }"

    extra_code << "
      static void frb_jump_tag(int state) {
        VALUE exception = rb_funcall(#{literal_value FastRuby::JumpTagException}, #{intern_num :new},1,INT2FIX(state)); 
        rb_exc_raise(exception);
      }
    "

  extra_code << "
    #define FASTRUBY_TAG_RETURN 0x80
    #define FASTRUBY_TAG_NEXT 0x81
    #define FASTRUBY_TAG_BREAK 0x82
    #define FASTRUBY_TAG_RAISE 0x83
    #define FASTRUBY_TAG_REDO 0x84
    #define FASTRUBY_TAG_RETRY 0x85
    #define TAG_RAISE 0x6

# define PTR2NUM(x)   (ULONG2NUM((unsigned long)(x)))
# define NUM2PTR(x)   ((void*)(NUM2ULONG(x)))

    #ifndef __INLINE_FASTRUBY_BASE
    #include \"#{FastRuby.fastruby_load_path}/../ext/fastruby_base/fastruby_base.inl\"
    #define __INLINE_FASTRUBY_BASE
    #endif
  "

  ruby_code = "
    unless $LOAD_PATH.include? #{FastRuby.fastruby_load_path.inspect}
      $LOAD_PATH << #{FastRuby.fastruby_load_path.inspect}
    end
    require #{FastRuby.fastruby_script_path.inspect}
  "

  init_extra << "
    rb_eval_string(#{ruby_code.inspect});
	"
	
	
  if RUBY_VERSION =~ /^1\.8/

  @lambda_node_gvar = add_global_name("NODE*", 0);
  @proc_node_gvar = add_global_name("NODE*", 0);
  @procnew_node_gvar = add_global_name("NODE*", 0);
  @callcc_node_gvar = add_global_name("NODE*", 0);
  
  init_extra << "
    #{@lambda_node_gvar} = rb_method_node(rb_cObject, #{intern_num :lambda});
    #{@proc_node_gvar} = rb_method_node(rb_cObject, #{intern_num :proc});
    #{@procnew_node_gvar} = rb_method_node(CLASS_OF(rb_cProc), #{intern_num :new});
    #{@callcc_node_gvar} = rb_method_node(rb_mKernel, #{intern_num :callcc});
  "
 elsif RUBY_VERSION =~ /^1\.9/

  @lambda_node_gvar = add_global_name("void*", 0);
  @proc_node_gvar = add_global_name("void*", 0);
  @procnew_node_gvar = add_global_name("void*", 0);
  @callcc_node_gvar = add_global_name("void*", 0);
  
  init_extra << "
    #{@lambda_node_gvar} = rb_method_entry(rb_cObject, #{intern_num :lambda});
    #{@proc_node_gvar} = rb_method_entry(rb_cObject, #{intern_num :proc});
    #{@procnew_node_gvar} = rb_method_entry(CLASS_OF(rb_const_get(rb_cObject, #{intern_num :Proc})), #{intern_num :new});
    #{@callcc_node_gvar} = rb_method_entry(rb_mKernel, #{intern_num :callcc});
  "
end

  @common_func = common_func
  if common_func
    extra_code << "static VALUE _rb_gvar_set(void* ge,VALUE value) {
      rb_gvar_set((struct global_entry*)ge,value);
      return value;
    }
    "

    extra_code << "static VALUE re_yield(int argc, VALUE* argv, VALUE param, VALUE _parent_frame) {
     VALUE yield_args = rb_ary_new4(argc,argv);
     VALUE* yield_args_p = &yield_args;

     #{@frame_struct}* pframe;
     pframe = (typeof(pframe))_parent_frame;

     return #{protected_block("last_expression = rb_yield_splat(*(VALUE*)yield_args_p)",true,"yield_args_p",true)};
    }"

    extra_code << "static VALUE _rb_ivar_set(VALUE recv,ID idvar, VALUE value) {
      rb_ivar_set(recv,idvar,value);
      return value;
    }
    "

    extra_code << "static VALUE __rb_cvar_set(VALUE recv,ID idvar, VALUE value, int warn) {
      #{if RUBY_VERSION =~ /^1\.9/
        "rb_cvar_set(recv,idvar,value);"
        elsif RUBY_VERSION =~ /^1\.8/
        "rb_cvar_set(recv,idvar,value,warn);"
        else
          raise RuntimeError, "unsupported ruby version #{RUBY_VERSION}"
        end 
      }
     
      return value;
    }
    "

    extra_code << "static VALUE _lvar_assing(VALUE* destination,VALUE value) {
      *destination = value;
      return value;
    }

/*
   #{caller.join("\n")}
*/

    "
    
  end
end

Instance Attribute Details

#alt_method_name ⇒ Object

Returns the value of attribute alt_method_name.



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# File 'lib/fastruby/translator/translator.rb', line 34

def alt_method_name
  @alt_method_name
end

#extra_code ⇒ Object (readonly)

Returns the value of attribute extra_code.



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# File 'lib/fastruby/translator/translator.rb', line 41

def extra_code
  @extra_code
end

#infer_lvar_map ⇒ Object

Returns the value of attribute infer_lvar_map.



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# File 'lib/fastruby/translator/translator.rb', line 33

def infer_lvar_map
  @infer_lvar_map
end

#infer_self ⇒ Object

Returns the value of attribute infer_self.



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# File 'lib/fastruby/translator/translator.rb', line 37

def infer_self
  @infer_self
end

#init_extra ⇒ Object (readonly)

Returns the value of attribute init_extra.



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# File 'lib/fastruby/translator/translator.rb', line 40

def init_extra
  @init_extra
end

#locals ⇒ Object

Returns the value of attribute locals.



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# File 'lib/fastruby/translator/translator.rb', line 35

def locals
  @locals
end

#no_cache ⇒ Object (readonly)

Returns the value of attribute no_cache.



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# File 'lib/fastruby/translator/translator.rb', line 39

def no_cache
  @no_cache
end

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/fastruby/translator/translator.rb', line 36

def options
  @options
end

#snippet_hash ⇒ Object

Returns the value of attribute snippet_hash.



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# File 'lib/fastruby/translator/translator.rb', line 38

def snippet_hash
  @snippet_hash
end

Class Method Details

.define_translator_for(ntype, options = {}, &blk) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 48

def self.define_translator_for(ntype, options = {}, &blk)
  condition_blk = proc do |*x|
    tree = x.first; tree.node_type == ntype
  end
  
  if options[:arity]
    if options[:arity] == 1
      condition_blk = proc do |*x|
        tree = x.first; x.size == 1 and tree.node_type == ntype
      end
    end
  end
  
  define_method_handler(:to_c, options, &blk).condition &condition_blk
end

Instance Method Details

#_raise(class_tree, message_tree = nil) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 255

def _raise(class_tree, message_tree = nil)
  class_tree = to_c class_tree unless class_tree.instance_of? String

  if message_tree.instance_of? String
    message_tree = "rb_str_new2(#{message_tree.inspect})"
  else
    message_tree = to_c message_tree
  end

  if message_tree
    return inline_block("
        pframe->thread_data->exception = rb_funcall(#{class_tree}, #{intern_num :exception},1,#{message_tree});
        longjmp(pframe->jmp, FASTRUBY_TAG_RAISE);
        return Qnil;
        ")
  else
    return inline_block("
        pframe->thread_data->exception = rb_funcall(#{class_tree}, #{intern_num :exception},0);
        longjmp(pframe->jmp, FASTRUBY_TAG_RAISE);
        return Qnil;
        ")
  end

end

#add_global_name(ctype, default) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 1532

def add_global_name(ctype, default)
  name = "glb" + rand(1000000000).to_s

  extra_code << "
    static #{ctype} #{name} = #{default};
  "
  name
end

#add_main ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 356

def add_main
  if options[:main]

    extra_code << "
      static VALUE #{@alt_method_name}(VALUE self__);
      static VALUE main_proc_call(VALUE self__, VALUE signature, VALUE class_self_) {
        #{@alt_method_name}(class_self_);
        return Qnil;
      }

    "

    init_extra << "
        {
        VALUE newproc = rb_funcall(rb_cObject,#{intern_num :new},0);
        rb_define_singleton_method(newproc, \"call\", main_proc_call, 2);
        rb_gv_set(\"$last_obj_proc\", newproc);
        }
      "
  end
end

#anonymous_function(*x) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 280

def anonymous_function(*x)

  name = "anonymous" + rand(10000000).to_s
  extra_code << yield(name,*x)

  name
end

#c_escape(str) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 1105

def c_escape(str)
  str.inspect
end

#catch_block(*catchs) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 100

def catch_block(*catchs)
    old_catch_blocks = @catch_blocks.dup
  begin
    catchs.each &@catch_blocks.method(:<<)
    return yield
  ensure
    @catch_blocks = old_catch_blocks
  end
end

#catch_on_throw ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 871

def catch_on_throw
  old_catch_jmp_on_throw = @catch_jmp_on_throw || false
  @catch_jmp_on_throw = true
  begin
    ret = yield
  ensure
    @catch_jmp_on_throw = old_catch_jmp_on_throw
  end
  
  ret
end

#define_method_at_init(method_name, size, signature) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 378

def define_method_at_init(method_name, size, signature)
  extra_code << "
    static VALUE main_proc_call(VALUE self__, VALUE signature, VALUE class_self_) {
      VALUE method_name = rb_funcall(
            #{literal_value FastRuby},
            #{intern_num :make_str_signature},
            2,
            #{literal_value method_name},
            signature
            );

      ID id = rb_intern(RSTRING_PTR(method_name));
      
      rb_funcall(
            #{literal_value FastRuby},
            #{intern_num :set_builder_module},
            1,
            class_self_
            );
      
      VALUE rb_method_hash;
      void** address = 0;
      rb_method_hash = rb_funcall(class_self_, #{intern_num :method_hash},1,#{literal_value method_name});

      if (rb_method_hash != Qnil) {
        VALUE tmp = rb_hash_aref(rb_method_hash, PTR2NUM(id));
        if (tmp != Qnil) {
            address = (void*)NUM2PTR(tmp);
        }
      }
      
      if (address == 0) {
        address = malloc(sizeof(void*));
      }
      *address = #{alt_method_name};
      
      rb_funcall(
          class_self_,
          #{intern_num :register_method_value}, 
          3,
          #{literal_value method_name},
          PTR2NUM(id),
          PTR2NUM(address)
          );
          
          return Qnil;
    }
  "
  
  init_extra << "
        {
        VALUE newproc = rb_funcall(rb_cObject,#{intern_num :new},0);
        rb_define_singleton_method(newproc, \"call\", main_proc_call, 2);
        rb_gv_set(\"$last_obj_proc\", newproc);
        }
      "
end

#directive(tree) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 809

def directive(tree)
  recv = tree[1]
  mname = tree[2]
  args = tree[3]

  if mname == :infer
    return to_c(recv)
  elsif mname == :lvar_type
    lvar_name = args[1][1] || args[1][2]
    lvar_type = eval(args[2][1].to_s)

    @infer_lvar_map[lvar_name] = lvar_type
    return "Qnil"
  elsif mname == :block_given?
    return "plocals->block_function_address == 0 ? Qfalse : Qtrue"
  elsif mname == :inline_c

    code = args[1][1]

    unless (args[2] == s(:false))
      return anonymous_function{ |name| "
         static VALUE #{name}(VALUE param) {
          #{@frame_struct} *pframe = (void*)param;
          #{@locals_struct} *plocals = (void*)pframe->plocals;
          #{code};

          return Qnil;
        }
       "
      }+"((VALUE)pframe)"
    else
      code
    end

  else
    nil
  end
end

#encode_address(recvtype, signature, mname, call_tree, inference_complete, convention_global_name = nil) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 1184

def encode_address(recvtype,signature,mname,call_tree,inference_complete,convention_global_name = nil)
  name = self.add_global_name("void*", 0);
  address_name = self.add_global_name("void**", 0);
  @last_address_name = address_name
  cfunc_address_name = self.add_global_name("void**", 0);
  cfunc_real_address_name  = self.add_global_name("void*", 0);
  tree_pointer_name = self.add_global_name("VALUE*", 0);
  args_tree = call_tree[3].reject{|st| st.respond_to?(:node_type) ? st[0] == :block_pass : false}
  method_tree = nil

  begin
    method_tree = recvtype.instance_method(@method_name.to_sym).fastruby.tree
  rescue NoMethodError
  end

  strargs_signature = (0..args_tree.size-2).map{|x| "VALUE arg#{x}"}.join(",")
  strargs = (0..args_tree.size-2).map{|x| "arg#{x}"}.join(",")
  inprocstrargs = (1..args_tree.size-1).map{|x| "((VALUE*)method_arguments)[#{x}]"}.join(",")

  if args_tree.size > 1
    strargs_signature = "," + strargs_signature
    toprocstrargs = "self,"+strargs
    strargs = "," + strargs
    inprocstrargs = ","+inprocstrargs
  else
    toprocstrargs = "self"
  end

  value_cast = ( ["VALUE"]*(args_tree.size) ).join(",") + ",VALUE,VALUE"

  recvdump = nil

  begin
     recvdump = literal_value recvtype
  rescue
  end
  
  pureruby_wrapper = anonymous_function{ |funcname| "
    static VALUE #{funcname}(VALUE self,void* block,void* frame, int argc, VALUE* argv){
      #{@frame_struct}* pframe = frame;
      VALUE method_arguments[3];
      
      method_arguments[0] = (VALUE)argc;
      method_arguments[1] = (VALUE)argv;
      method_arguments[2] = (VALUE)self;
      
      return #{
        protected_block "last_expression = rb_funcall2(((VALUE*)method_arguments)[2], #{intern_num mname.to_sym}, ((int*)method_arguments)[0], ((VALUE**)method_arguments)[1]);", false, "method_arguments"
        };
    }
  "
  }
  
  generic_wrapper = anonymous_function{ |funcname| "
    static VALUE #{funcname}(VALUE self,void* block,void* frame, int argc, VALUE* argv){
    
      #{@frame_struct}* pframe = frame;
      VALUE method_arguments[4];
      
      method_arguments[0] = (VALUE)argc;
      method_arguments[1] = (VALUE)argv;
      method_arguments[2] = (VALUE)self;
      method_arguments[3] = (VALUE)block;
      
      void* fptr = 0;
      
      if (*#{address_name} == 0) {
        if (#{tree_pointer_name} != 0) {
          if (*#{tree_pointer_name} != Qnil) {
            VALUE signature = #{literal_value signature};
            VALUE recvtype = #{recvdump};
            VALUE mname = #{literal_value mname};
            
            rb_funcall(recvtype, #{intern_num :build}, 2, signature, mname);
          }
        }
      }
      
      fptr = *#{address_name};
      
        if (fptr == 0) {
          fptr = *#{cfunc_address_name};
          if (fptr != 0) {
            return ( (VALUE(*)(VALUE,VALUE,VALUE,int,VALUE*) ) (fptr) )(self,(VALUE)block,(VALUE)frame, argc, argv);  
          }
        }

      if (fptr == 0) {
        if (block==0) {
          return #{
            protected_block "last_expression = rb_funcall2(((VALUE*)method_arguments)[2], #{intern_num mname.to_sym}, ((int*)method_arguments)[0], ((VALUE**)method_arguments)[1]);", false, "method_arguments"
            };

        } else {
          return #{
              protected_block "
                    #{@block_struct} *pblock;
                    pblock = (typeof(pblock))( ((VALUE*)method_arguments)[3] );
                    last_expression = rb_iterate(
                    #{anonymous_function{|name|
                      "
                        static VALUE #{name} (VALUE data) {
                          VALUE* method_arguments = (VALUE*)data;
                          return rb_funcall2(((VALUE*)method_arguments)[2], #{intern_num mname.to_sym}, ((int*)method_arguments)[0], ((VALUE**)method_arguments)[1]);
                        }
                      "
                    }},
                      (VALUE)method_arguments,
                      
                    #{anonymous_function{|name|
                      "
                        static VALUE #{name} (VALUE arg_, VALUE param, int argc, VALUE* argv) {

       VALUE arg;
        #{
        # TODO: access directly to argc and argv for optimal execution
        if RUBY_VERSION =~ /^1\.9/ 
          "
            if (TYPE(arg_) == T_ARRAY) {
              if (_RARRAY_LEN(arg_) <= 1) {
                arg = rb_ary_new4(argc,argv);
              } else {
                arg = arg_;
              }
            } else {
              arg = rb_ary_new4(argc,argv);
            }
          "
        else
          "arg = arg_;"
        end
        }
    
                          return rb_proc_call(param, arg);
                        }
                      "
                    }},
                      pblock->proc
                    );
            ", false, "method_arguments"
            };
        }

      } else {
        return ( (VALUE(*)(VALUE,VALUE,VALUE,int,VALUE*)) (fptr) )(self,(VALUE)block,(VALUE)frame,argc,argv);  
      }
    }
    "
  }


  cfuncall1inprocargs = (0..args_tree.size-2).map{|x| "argv[#{x}]"}.join(",")
  cfuncall1inprocargs = ","+cfuncall1inprocargs if cfuncall1inprocargs != ""
  
  cfunc_value_cast = (["VALUE"]*args_tree.size).join(",")
  cfunc_wrapper = anonymous_function{ |funcname| "
    static VALUE #{funcname}(VALUE self, void* block,void* frame, int argc, VALUE* argv){
        return ( (VALUE(*)(#{cfunc_value_cast})) (#{cfunc_real_address_name}) )(self#{cfuncall1inprocargs});
    }
    "
  }
  
  toprocstrargs = (0..25).map{|x| "arg#{x}"}.join(",")
  strargs_signature = (0..25).map{|x| "VALUE arg#{x}"}.join(",")

  cfunc_wrapper_1 = anonymous_function{ |funcname| "
    static VALUE #{funcname}(VALUE self, void* block,void* frame, int argc, VALUE* argv){
        return ( (VALUE(*)(int, VALUE*, VALUE)) (#{cfunc_real_address_name}) )(argc,argv,self);
    }
    "
  }

  cfunc_wrapper_2 = anonymous_function{ |funcname| "
    static VALUE #{funcname}(VALUE self, void* block,void* frame, int argc, VALUE* argv){
        VALUE args = rb_ary_new3(argc, argv);
        return ( (VALUE(*)(VALUE,VALUE)) (#{cfunc_real_address_name}) )(self,args);
    }
    "
  }

  update_cfunc_method = anonymous_function{ |funcname| "
      static VALUE #{funcname}(){
            void** default_address = (void**)#{cfunc_address_name};
            ID default_id = rb_intern(\"default\");
            VALUE recvtype = #{recvdump};

            if (1) {
              *default_address = 0;

#ifdef RUBY_1_8

      // this only works with ruby1.8

              NODE* body = rb_method_node(recvtype,#{intern_num mname});
              if (body != 0) {
                if (nd_type(body) == NODE_CFUNC) {
                  if (body->nd_argc == #{args_tree.size-1}) {
                    *default_address = #{cfunc_wrapper};
                    #{cfunc_real_address_name} = (void*)body->nd_cfnc;
                  } else if (body->nd_argc == -1) {
                    *default_address = #{cfunc_wrapper_1};
                    #{cfunc_real_address_name} = (void*)body->nd_cfnc;
                  } else if (body->nd_argc == -2) {
                    *default_address = #{cfunc_wrapper_2};
                    #{cfunc_real_address_name} = (void*)body->nd_cfnc;
                  }
                }
              }
#endif
#ifdef RUBY_1_9
              rb_method_entry_t* me = rb_method_entry(recvtype,#{intern_num mname});
              if (me != 0) {
                rb_method_definition_t* def = me->def;
                
                if (def->type == VM_METHOD_TYPE_CFUNC) {
                  if (def->body.cfunc.argc == #{args_tree.size-1}) {
                    *default_address = #{cfunc_wrapper};
                    #{cfunc_real_address_name} = (void*)def->body.cfunc.func;
                  } else if (def->body.cfunc.argc == -1) {
                    *default_address = #{cfunc_wrapper_1};
                    #{cfunc_real_address_name} = (void*)def->body.cfunc.func;
                  } else if (def->body.cfunc.argc == -2) {
                    *default_address = #{cfunc_wrapper_2};
                    #{cfunc_real_address_name} = (void*)def->body.cfunc.func;
                  }
                }
              }
#endif

              if (recvtype != Qnil) { 
                rb_funcall(
                    recvtype,
                    #{intern_num :register_method_value}, 
                    3,
                    #{literal_value mname},
                    PTR2NUM(default_id),
                    PTR2NUM(default_address)
                    );
              }
            }
          return Qnil;
      }
    "
  }
    
    

  if recvdump and recvtype
    init_extra << "
      {
        VALUE recvtype = #{recvdump};
        rb_funcall(#{literal_value FastRuby}, #{intern_num :set_builder_module}, 1, recvtype);
        VALUE signature = #{literal_value signature};
        VALUE mname = #{literal_value mname};
        VALUE tree = #{literal_value method_tree};
        VALUE rb_str_signature = rb_funcall(
                                  #{literal_value FastRuby},
                                  #{intern_num :make_str_signature},
                                  2,
                                  mname,
                                  signature);



        VALUE fastruby_method = rb_funcall(recvtype, #{intern_num :fastruby_method}, 1, mname);
        #{tree_pointer_name} = (VALUE*)NUM2PTR(fastruby_method_tree_pointer(fastruby_method));
        
        ID id;
        ID default_id = rb_intern(\"default\");
        VALUE rb_method_hash;
        void** address = 0;
        void** default_address = 0;
        id = rb_intern(RSTRING_PTR(rb_str_signature));
        rb_method_hash = rb_funcall(recvtype, #{intern_num :method_hash},1,mname);

        if (rb_method_hash != Qnil) {
          VALUE tmp = rb_hash_aref(rb_method_hash, PTR2NUM(id));
          if (tmp != Qnil) {
              address = (void*)NUM2PTR(tmp);
          }
          
          tmp = rb_hash_aref(rb_method_hash, PTR2NUM(default_id));
          if (tmp != Qnil) {
             default_address = (void*)NUM2PTR(tmp);
          }
        }
        
        if (default_address==0) {
          default_address = malloc(sizeof(void*));
          *default_address = 0;
        }
        #{cfunc_address_name} = default_address;
        
        #{update_cfunc_method}();
        rb_iterate(#{anonymous_function{|funcname|
          "static VALUE #{funcname}(VALUE recv) {
            return rb_funcall(recv, #{intern_num :observe}, 1, #{literal_value(alt_method_name + "#" + cfunc_address_name)});
          }
          "
        }},fastruby_method,#{update_cfunc_method},Qnil);

        if (address==0) {
          address = malloc(sizeof(void*));
          
          if (recvtype != Qnil) { 
            rb_funcall(
                recvtype,
                #{intern_num :register_method_value}, 
                3,
                #{literal_value mname},
                PTR2NUM(id),
                PTR2NUM(address)
                );
          }
  
          *address = 0; //(void*)
        }
        
        #{address_name} = address;
        #{name} = (void*)#{generic_wrapper};
      }
    "
  else
    init_extra << "
    // ruby, wrap rb_funcall
    #{name} = (void*)#{pureruby_wrapper};
    "
  end

  name
end

#frame(code, jmp_code, not_jmp_code = "", rescued = nil) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 1552

def frame(code, jmp_code, not_jmp_code = "", rescued = nil)

  anonymous_function{ |name| "
    static VALUE #{name}(VALUE param) {
      volatile VALUE last_expression = Qnil;
      #{@frame_struct} frame;

      typeof(frame)* volatile pframe;
      typeof(frame)* volatile parent_frame;
      #{@locals_struct}* volatile plocals;

      parent_frame = (void*)param;

      frame.parent_frame = (void*)param;
      frame.plocals = parent_frame->plocals;
      frame.rescue = #{rescued ? rescued : "parent_frame->rescue"};
      frame.targetted = 0;
      frame.thread_data = parent_frame->thread_data;
      if (frame.thread_data == 0) frame.thread_data = rb_current_thread_data();

      plocals = frame.plocals;
      pframe = &frame;

      int aux = setjmp(frame.jmp);
      if (aux != 0) {
        last_expression = pframe->return_value;

        // restore previous frame
        typeof(pframe) original_frame = pframe;
        pframe = parent_frame;

        #{jmp_code};

        if (original_frame->targetted == 0) {
          longjmp(pframe->jmp,aux);
        }

        return last_expression;
      }

      #{code};

      // restore previous frame
      volatile typeof(pframe) original_frame = pframe;
      pframe = parent_frame;
      #{not_jmp_code};

      return last_expression;

      }
    "
  } + "((VALUE)pframe)"
end

#frame_call(inner_code, precode = "", postcode = "") ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 288

def frame_call(inner_code, precode = "", postcode = "")
  inline_block "

    volatile VALUE ret = Qnil;
    // create a call_frame
    #{@frame_struct} call_frame;
    typeof(call_frame)* volatile old_pframe = (void*)pframe;

    pframe = (typeof(pframe))&call_frame;

    call_frame.parent_frame = (void*)pframe;
    call_frame.plocals = plocals;
    call_frame.return_value = Qnil;
    call_frame.targetted = 0;
    call_frame.thread_data = old_pframe->thread_data;
    if (call_frame.thread_data == 0) call_frame.thread_data = rb_current_thread_data();

    void* volatile old_call_frame = plocals->call_frame;
    plocals->call_frame = &call_frame;

    #{precode}

            int aux = setjmp(call_frame.jmp);
            if (aux != 0) {
              if (call_frame.targetted == 0) {
                #{postcode}
                longjmp(old_pframe->jmp,aux);
              }

              if (aux == FASTRUBY_TAG_BREAK) {
                plocals->call_frame = old_call_frame;
                #{postcode}
                return call_frame.return_value;
              } else if (aux == FASTRUBY_TAG_RETRY ) {
                // do nothing and let the call execute again
              } else {
                plocals->call_frame = old_call_frame;
                #{postcode}
                return call_frame.return_value;
              }
            }
            

    #{inner_code};
    
    #{postcode}
    
    plocals->call_frame = old_call_frame;
    return ret;
  "
end

#generate_protected_block(inner_code, always_rescue = false, repass_var = nil, nolocals = false) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 968

def generate_protected_block(inner_code, always_rescue = false,repass_var = nil, nolocals = false)
  body = nil
  rescue_args = nil

    body =  anonymous_function{ |name| "
      static VALUE #{name}(VALUE param) {

        #{@frame_struct} frame;

        typeof(frame)* volatile pframe;
        
        #{if repass_var
        "typeof(frame)* parent_frame = ((typeof(pframe))((void**)param)[0]);"
        else
        "typeof(frame)* parent_frame = (typeof(pframe))param;"
        end
        }

        frame.parent_frame = 0;
        frame.return_value = Qnil;
        frame.rescue = 0;
        frame.last_error = Qnil;
        frame.targetted = 0;
        frame.thread_data = parent_frame->thread_data;
        frame.next_recv = parent_frame->next_recv;
        if (frame.thread_data == 0) frame.thread_data = rb_current_thread_data();

        pframe = &frame;

        #{
        nolocals ? "frame.plocals = 0;" : "#{@locals_struct}* plocals = parent_frame->plocals;
        frame.plocals = plocals;
        "
        }

        int aux = setjmp(frame.jmp);
        if (aux != 0) {

          if (frame.targetted == 1) {
            return frame.return_value;
          } else {
            frb_jump_tag(aux);
          }
        }

        #{if repass_var 
          "VALUE #{repass_var} = (VALUE)((void**)param)[1];"
        end
        }
          volatile VALUE last_expression = Qnil;
          #{inner_code};
          return last_expression;
        }
      "
    }

  if repass_var
    rescue_args = ""
    rescue_args = "(VALUE)(VALUE[]){(VALUE)pframe,(VALUE)#{repass_var}}"
  else
    rescue_args = "(VALUE)pframe"
  end

  wrapper_code = "
        if (str.state >= 0x80) {
          longjmp(pframe->jmp, str.state);
        } else {
          if (str.last_error != Qnil) {
              // raise emulation
              pframe->thread_data->exception = str.last_error;
              longjmp(pframe->jmp, FASTRUBY_TAG_RAISE);
              return Qnil;
          }
        }
    "
    
    return_err_struct = "struct {
        VALUE last_error;
        int state;
      }
      "

    rescue_body = anonymous_function{ |name| "
      static VALUE #{name}(VALUE param, VALUE err) {
        #{return_err_struct} *pstr = (void*)param;
        
        if (rb_obj_is_instance_of(err, #{literal_value FastRuby::JumpTagException})) {
          pstr->state = FIX2INT(rb_funcall(err, #{intern_num :state}, 0));
        } else {
          pstr->last_error = err;
        }
        
        return Qnil;
      }
    "
  }

  rescue_code = "rb_rescue2(#{body}, #{rescue_args}, #{rescue_body}, (VALUE)&str, rb_eException, (VALUE)0)"

  if always_rescue
    "
      #{return_err_struct} str;
      
      str.state = 0;
      str.last_error = Qnil;
      
      pframe->last_error = Qnil;
      VALUE result = #{rescue_code};

      #{wrapper_code}

      return result;
    "
  else
    "
      VALUE result;
      #{return_err_struct} str;
      
      str.state = 0;
      str.last_error = Qnil;
      
      pframe->last_error = Qnil;

      if (pframe->rescue) {
        result = #{rescue_code};
        #{wrapper_code}
      } else {
        VALUE last_expression = Qnil;
        #{inner_code};
        return last_expression;
      }

      return result;
    "
  end
end

#global_entry(glbname) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 1541

def global_entry(glbname)
  name = add_global_name("struct global_entry*", 0);

  init_extra << "
    #{name} = rb_global_entry(SYM2ID(#{literal_value glbname}));
  "

  name
end

#infer_type(recv) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 785

def infer_type(recv)
  if recv[0] == :call
    if recv[2] == :infer
      eval(recv[3].last.last.to_s)
    end
  elsif recv[0] == :lvar
    @infer_lvar_map[recv[1]]
  elsif recv[0] == :self
    @infer_self
  elsif recv[0] == :str or recv[0] == :lit
    recv[1].class
  else
    nil
  end
end

#initialize_method_structs(args_tree) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 340

def initialize_method_structs(args_tree)
  @locals_struct = "struct {
    int size;        
    void* call_frame;
    void* parent_locals;
    void* pframe;
    void* block_function_address;
    void* block_function_param;
    VALUE active;
    VALUE targetted;
    VALUE return_value;
    #{@locals.map{|l| "VALUE #{l};\n"}.join}
    }"

end

#inline_block(*args) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 883

def inline_block(*args)
  
  unless block_given?
    code = args.first
    return inline_block(*args[1..-1]) {
        code
      }
  end
  
  repass_var = args[0]
  nolocals = args[1] || false
  
  code = catch_on_throw{ yield }

  anonymous_function{ |name| "
    static VALUE #{name}(VALUE param#{repass_var ? ",void* " + repass_var : "" }) {
      #{@frame_struct} * volatile pframe = (void*)param;

      #{nolocals ? "" : "#{@locals_struct} * volatile plocals = (void*)pframe->plocals;"}
      volatile VALUE last_expression = Qnil;

      #{code}
      return Qnil;


#{@catch_blocks.map { |cb|
  "#{cb.to_s}_end:

   plocals->return_value = last_expression;
   plocals->targetted = 1;
   longjmp(pframe->jmp, #{intern_num( cb.to_s + "_end")});

   #{cb.to_s}_start:
  
   plocals->return_value = last_expression;
   plocals->targetted = 1;
   longjmp(pframe->jmp, #{intern_num( cb.to_s + "_start")});
  
  "

}.join("\n")
}
      #{unless nolocals
      "
local_return:
    plocals->return_value = last_expression;
    plocals->targetted = 1;
    longjmp(pframe->jmp, FASTRUBY_TAG_RETURN);
    return last_expression;
    "
    end
      }
fastruby_local_redo:
      longjmp(pframe->jmp,FASTRUBY_TAG_REDO);
      return Qnil;
fastruby_local_next:
      longjmp(pframe->jmp,FASTRUBY_TAG_NEXT);
      return Qnil;


      }
    "
  } + "((VALUE)pframe#{repass_var ? ", " + repass_var : "" })"
end

#inline_block_reference(arg, nolocals = false) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 848

def inline_block_reference(arg, nolocals = false)
  code = nil

  if arg.instance_of? FastRuby::FastRubySexp
    code = to_c(arg);
  else
    code = arg
  end

  anonymous_function{ |name| "
    static VALUE #{name}(VALUE param) {
      #{@frame_struct} *pframe = (void*)param;

      #{nolocals ? "" : "#{@locals_struct} *plocals = (void*)pframe->plocals;"}
      VALUE last_expression = Qnil;

      #{code};
      return last_expression;
      }
    "
  }
end

#inline_ruby(proced, parameter) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 948

def inline_ruby(proced, parameter)
  "rb_funcall(#{proced.__id__}, #{intern_num :call}, 1, #{parameter})"
end

#intern_num(symbol) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 1516

def intern_num(symbol)
  symbol = symbol.to_sym
  @intern_num_hash = Hash.new unless @intern_num_hash
  return @intern_num_hash[symbol] if @intern_num_hash[symbol]

  name = self.add_global_name("ID", 0);

  init_extra << "
    #{name} = rb_intern(\"#{symbol.to_s}\");
  "

  @intern_num_hash[symbol] = name

  name
end

#literal_value(value) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 1109

def literal_value(value)
  @literal_value_hash = Hash.new unless @literal_value_hash
  return @literal_value_hash[value] if @literal_value_hash[value]

  name = self.add_global_name("VALUE", "Qnil");

  begin

    str = Marshal.dump(value)


    if value.instance_of? Module

      container_str = value.to_s.split("::")[0..-2].join("::")

      init_extra << "
        #{name} = rb_define_module_under(
                #{container_str == "" ? "rb_cObject" : literal_value(eval(container_str))}
                ,\"#{value.to_s.split("::").last}\");

        rb_funcall(#{name},#{intern_num :gc_register_object},0);
      "
    elsif value.instance_of? Class
      container_str = value.to_s.split("::")[0..-2].join("::")

      str_class_name = value.to_s.split("::").last

      if (str_class_name == "Object")
        init_extra << "
          #{name} = rb_cObject;
        "
      else
        init_extra << "
          #{name} = rb_define_class_under(
                  #{container_str == "" ? "rb_cObject" : literal_value(eval(container_str))}
                  ,\"#{str_class_name}\"
                  ,#{value.superclass == Object ? "rb_cObject" : literal_value(value.superclass)});

          rb_funcall(#{name},#{intern_num :gc_register_object},0);
        "
      end
    elsif value.instance_of? Array
      init_extra << "
        #{name} = rb_ary_new3(#{value.size}, #{value.map{|x| literal_value x}.join(",")} );
        rb_funcall(#{name},#{intern_num :gc_register_object},0);
      "
    else
      
      require "base64"

      init_extra << "
      
        {
          VALUE encoded_str = rb_str_new2(#{Base64.encode64(str).inspect});
          VALUE str = rb_funcall(rb_cObject, #{intern_num :decode64}, 1, encoded_str);
          #{name} = rb_marshal_load(str);
          
          rb_funcall(#{name},#{intern_num :gc_register_object},0);
        }

      "
    end
  rescue TypeError => e
    @no_cache = true
    FastRuby.logger.info "#{value} disabling cache for extension"
    init_extra << "
      #{name} = rb_funcall(rb_const_get(rb_cObject, #{intern_num :ObjectSpace}), #{intern_num :_id2ref}, 1, INT2FIX(#{value.__id__}));
    "

  end
 @literal_value_hash[value] = name

  name
end

#locals_accessor ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 755

def locals_accessor
  "plocals->"
end

#locals_scope(locals) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 759

def locals_scope(locals)
   old_locals = @locals
   old_locals_struct = @locals_struct

   @locals = locals
    @locals_struct = "struct {
    int size;
    void* call_frame;
    void* parent_locals;
    void* pframe;
    void* block_function_address;
    void* block_function_param;
    VALUE active;
    VALUE targetted;
    VALUE return_value;
    #{@locals.map{|l| "VALUE #{l};\n"}.join}
    }"

  begin
    yield
  ensure
    @locals = old_locals
    @locals_struct = old_locals_struct
  end
end

#on_block ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 801

def on_block
  old_on_block = @on_block
  @on_block = true
  return yield
ensure
  @on_block = old_on_block
end

#protected_block(*args) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 952

def protected_block(*args)
  unless block_given?
    inner_code = args.first
    return protected_block(*args[1..-1]) {
      inner_code
    }
  end
  
  repass_var = args[1]
  nolocals = args[2] || false
  
  inline_block(repass_var, nolocals) do
    generate_protected_block(yield, *args)
  end
end

#to_c_and(tree, return_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/logical.rb', line 25

def to_c_and(tree, return_var = nil)
  if return_var
    "
      {
        VALUE op1 = Qnil;
        VALUE op2 = Qnil;
        #{to_c tree[1], "op1"};
        #{to_c tree[2], "op2"};
        #{return_var} = (RTEST(op1) && RTEST(op2)) ? Qtrue : Qfalse;
      }
    "
  else
    "(RTEST(#{to_c tree[1]}) && RTEST(#{to_c tree[2]})) ? Qtrue : Qfalse"
  end
  
end

#to_c_array(tree, result_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/literal.rb', line 75

def to_c_array(tree, result_var = nil)
  if tree.size > 1
    if result_var
      prefix = "_array_element_" + rand(10000000).to_s + "_"
      "
      {
        #{ 
          (0..tree.size-2).map{|x|
            "VALUE #{prefix}#{x};"
          }.join("\n");
        }
        
        #{
          (0..tree.size-2).map{|x|
            to_c(tree[x+1], prefix+x.to_s)
          }.join("\n");
        }
        
        #{result_var} = rb_ary_new3(#{tree.size-1}, #{(0..tree.size-2).map{|x| prefix+x.to_s}.join(",")} );
      }
      "
    else
      strargs = tree[1..-1].map{|subtree| to_c subtree}.join(",")
      "rb_ary_new3(#{tree.size-1}, #{strargs})"
    end
  else
    if result_var
    "#{result_var} = rb_ary_new3(0);"
    else
    "rb_ary_new3(0)"
    end
  end
end

#to_c_attrasgn(tree) ⇒ Object 



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# File 'lib/fastruby/translator/modules/call.rb', line 319

def to_c_attrasgn(tree)
  to_c_call(tree)
end

#to_c_block(tree, result_variable = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/block.rb', line 97

def to_c_block(tree, result_variable = nil)
  if tree.size == 1
    return inline_block("return Qnil;")
  end

  code = proc{
    
    str = tree[1..-2].map{ |subtree|
      to_c(subtree,"last_expression")
    }.join(";")
  
    if tree[-1]
        str = str + ";#{to_c(tree[-1],"last_expression")};"
    end
  
    if result_variable
      str << "#{result_variable} = last_expression;"
    else
      str << "return last_expression;"
    end
    str
  }
  
  if result_variable
    code.call
  else
    inline_block &code
  end
end

#to_c_break(tree, result_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/nonlocal.rb', line 40

def to_c_break(tree, result_var = nil)
  
    value_tmp_var = "value_" + rand(10000000).to_s
  
    code = proc{"

      {
     VALUE #{value_tmp_var} = Qnil; 
     #{
     if tree[1]
       to_c(tree[1], value_tmp_var)
     end
     };

     typeof(pframe) target_frame_;
     target_frame_ = (void*)plocals->call_frame;

     if (target_frame_ == 0) {
        #{_raise("rb_eLocalJumpError","illegal break")};
     }

     plocals->call_frame = 0;

     target_frame_->return_value = #{value_tmp_var};
     target_frame_->targetted = 1;
     pframe->thread_data->exception = Qnil;
     longjmp(pframe->jmp,FASTRUBY_TAG_BREAK);
     
     }
     "}
     
     if result_var
       code.call
     else
       inline_block code
     end
end

#to_c_call(tree, result_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/call.rb', line 25

def to_c_call(tree, result_var = nil)
  repass_var = @repass_var

  recv = tree[1]
  mname = tree[2]
  args = tree[3]
  args_tree = tree[3]
  
  # search block_pass on arguments
  block_pass_arg = args.find{|arg| if arg == :arglist
        false
      else
      arg[0] == :block_pass
        end} 

  if block_pass_arg
    args_tree = args_tree.dup.reject{|st| 
      if st.respond_to? :node_type
        st.node_type == :block_pass
      else 
        false
      end
     }
    args = args_tree
  end
 
  mname = :require_fastruby if mname == :require

  argnum = args.size - 1

  recv = recv || s(:self)

  recvtype = infer_type(recv)
  
  if args.size > 1
    if (not recvtype) or args.last[0] == :splat
      if block_pass_arg
        call_tree = tree.dup
        call_tree[3] = args.select{|arg| if arg == :arglist 
            true
            else
              arg[0] != :block_pass
              end
              }
        
        block_arguments_tree = s(:masgn, s(:array, s(:splat, s(:lasgn, :__xblock_arguments))))
        block_tree = s(:call, s(:lvar, :__x_proc), :call, s(:arglist, s(:splat, s(:lvar, :__xblock_arguments))))
        
        replace_iter_tree = s(:block,
            s(:lasgn, :__x_proc, s(:call, block_pass_arg[1], :to_proc, s(:arglist))),
            s(:iter, call_tree, block_arguments_tree, block_tree)
            ).to_fastruby_sexp
      
        if result_var  
          return to_c(replace_iter_tree,result_var)
        else
          return to_c(replace_iter_tree)
        end
      end
    end

    if args.last[0] == :splat
      aux_varname = "_aux_" + rand(1000000).to_s
      code = protected_block(
        "
        
        VALUE array = Qnil;
        
        #{to_c args.last[1], "array"};
        
        if (TYPE(array) != T_ARRAY) {
          array = rb_ary_new4(1,&array);
        }
        
        int argc = #{args.size-2};
        VALUE argv[#{args.size} + _RARRAY_LEN(array)];
        VALUE #{aux_varname} = Qnil;
        #{
          i = -1
          args[1..-2].map {|arg|
            i = i + 1
            "#{to_c arg, aux_varname};
            argv[#{i}] = #{aux_varname};
            "
          }.join(";\n")
        };
        
        VALUE recv = Qnil;
        
        #{to_c recv, "recv"};
        
        int array_len = _RARRAY_LEN(array);
        
        int i;
        for (i=0; i<array_len;i++) {
          argv[argc] = rb_ary_entry(array,i);
          argc++; 
        }
        
        last_expression = rb_funcall2(recv, #{intern_num tree[2]}, argc, argv);
        ", true, repass_var)
        
      if result_var
       return "#{result_var} = #{code};\n"
      else
       return code
      end
    end
  end

  if recvtype

    address = nil
    mobject = nil

    inference_complete = true
    signature = [recvtype]

    args[1..-1].each do |arg|
      argtype = infer_type(arg)
      signature << argtype
      unless argtype
        inference_complete = false
      end
    end

    if repass_var
      extraargs = ","+repass_var
      extraargs_signature = ",VALUE " + repass_var
    else
      extraargs = ""
      extraargs_signature = ""
    end

      block_proc_tree = s(:call, block_pass_arg[1], :to_proc, s(:arglist)) if block_pass_arg

      block_wrapping_proc = proc { |name| "
        static VALUE #{name}(int argc, VALUE* argv, VALUE _locals, VALUE _parent_frame) {
          return rb_proc_call(_locals, rb_ary_new4(argc, argv)); 
        }
      "
      }
 
      if argnum == 0
        value_cast = "VALUE,VALUE,VALUE"


          if block_pass_arg or result_var
            code = proc{ "
            {
            VALUE recv = Qnil;
            #{to_c recv, "recv"};

            #{@block_struct} block, *pblock = Qfalse;

            #{if block_pass_arg
            "
            VALUE proc = Qnil;
            #{to_c(block_proc_tree, "proc") }

            VALUE block_address_value = rb_ivar_get(proc, #{intern_num "__block_address"});

            if (block_address_value != Qnil) {
              block.block_function_address = NUM2PTR(block_address_value);
              block.block_function_param = NUM2PTR(rb_ivar_get(proc, #{intern_num "__block_param"}));
              block.proc = proc;
              pblock = &block;
            } else {
              // create a block from a proc
              block.block_function_address = ((void*)#{anonymous_function(&block_wrapping_proc)});
              block.block_function_param = (void*)proc;
              block.proc = proc;
              pblock = &block;
            }

            "
            end
            }

            #{if result_var
            "
            #{result_var} = ((VALUE(*)(VALUE,VALUE,VALUE,int,VALUE*))#{encode_address(recvtype,signature,mname,tree,inference_complete)})(recv, (VALUE)pblock, (VALUE)pframe, 0, (VALUE[]){});
            "
            else
            "
            ((VALUE(*)(VALUE,VALUE,VALUE,int,VALUE*))#{encode_address(recvtype,signature,mname,tree,inference_complete)})(recv, (VALUE)pblock, (VALUE)pframe, 0, (VALUE[]){});
            "
            end
            }
            }
            "
            }
          
            result_var ? code.call : inline_block(&code)
          else
             "((VALUE(*)(VALUE,VALUE,VALUE,int,VALUE*))#{encode_address(recvtype,signature,mname,tree,inference_complete)})(#{to_c recv}, Qfalse, (VALUE)pframe, 0, (VALUE[]){})"               
          end          

      else
        value_cast = ( ["VALUE"]*(args.size) ).join(",") + ",VALUE,VALUE"
        suffix = "_" + rand(1000000).to_s+"_"

            strargs = (0..args_tree.size-2).map{|i| "#{suffix}arg#{i}"}.join(",")
          if block_pass_arg or result_var
            code = proc{ "
            {
            VALUE recv = Qnil;
            
            #{
            (0..args_tree.size-2).map{ |x|
              "VALUE #{suffix}arg#{x};"
            }.join("\n")
            }

            #{
            (0..args_tree.size-2).map{ |x|
              to_c(args_tree[x+1], "#{suffix}arg#{x}") + ";"
            }.join("\n")
            }
            
            #{to_c recv, "recv"};

            #{@block_struct} block, *pblock = Qfalse;

            #{if block_pass_arg
            "
            VALUE proc = Qnil;
            #{to_c(block_proc_tree, "proc") }
            VALUE block_address_value = rb_ivar_get(proc, #{intern_num "__block_address"});
            if (block_address_value != Qnil) {
              block.block_function_address = NUM2PTR(block_address_value);
              block.block_function_param = NUM2PTR(rb_ivar_get(proc, #{intern_num "__block_param"}));
              block.proc = proc;
              pblock = &block;
            } else {
              // create a block from a proc
              block.block_function_address = ((void*)#{anonymous_function(&block_wrapping_proc)});
              block.block_function_param = (void*)proc;
              block.proc = proc;
              pblock = &block;
            }

            "
            end
            }

            #{if result_var
            "
            #{result_var} = ((VALUE(*)(VALUE,VALUE,VALUE,int,VALUE*))#{encode_address(recvtype,signature,mname,tree,inference_complete)})(recv, (VALUE)pblock, (VALUE)pframe, #{args.size-1}, (VALUE[]){#{strargs}});
            "
            else
            "
            ((VALUE(*)(VALUE,VALUE,VALUE,int,VALUE*))#{encode_address(recvtype,signature,mname,tree,inference_complete)})(recv, (VALUE)pblock, (VALUE)pframe, #{args.size-1}, (VALUE[]){#{strargs}});
            "
            end
            }

            
            }
            "
            }
            
            result_var ? code.call : inline_block(&code)
          else
            strargs = args[1..-1].map{|arg| to_c arg}.join(",")
            "((VALUE(*)(VALUE,VALUE,VALUE,int,VALUE*))#{encode_address(recvtype,signature,mname,tree,inference_complete)})(#{to_c recv}, Qfalse, (VALUE)pframe, #{args.size-1}, (VALUE[]){#{strargs}})"
          end
      end

  else # else recvtype
    if argnum == 0
      code = protected_block("last_expression = rb_funcall(#{to_c recv}, #{intern_num tree[2]}, 0)", true, repass_var)
      if result_var
      "
        #{result_var} = #{code};
      "
      else
        code
      end
    else
      strargs = args[1..-1].map{|arg| to_c arg}.join(",")
      code = protected_block("last_expression = rb_funcall(#{to_c recv}, #{intern_num tree[2]}, #{argnum}, #{strargs} )", true, repass_var)
      if result_var
      "
        #{result_var} = #{code};
      "
      else
        code
      end
    end
  end # if recvtype
end

#to_c_cdecl(tree, result_var_ = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/variable.rb', line 99

def to_c_cdecl(tree, result_var_ = nil)
  
  result_var = result_var_ || "value"
  
  if tree[1].instance_of? Symbol
    code = proc{"
      {
        // set constant #{tree[1].to_s}
        #{to_c tree[2], result_var};
        rb_const_set(rb_cObject, #{intern_num tree[1]}, #{result_var});
      }
      "}
  elsif tree[1].instance_of? FastRuby::FastRubySexp

    if tree[1].node_type == :colon2
      code = proc{"
        {
          // set constant #{tree[1].to_s}
          #{to_c tree[2], result_var};
          VALUE klass = Qnil;
          #{to_c tree[1][1], "klass"};
          rb_const_set(klass, #{intern_num tree[1][2]}, #{result_var});
        }
        "}
    elsif tree[1].node_type == :colon3
      code = proc{"
        {
        // set constant #{tree[1].to_s}
        #{to_c tree[2], result_var};
        rb_const_set(rb_cObject, #{intern_num tree[1][1]}, #{result_var});
        }
        "}
    end
  end

    if result_var_
      code.call
    else
       inline_block{"VALUE #{result_var} = Qnil;\n" + code.call + "
        return #{result_var};
       "}
    end
end

#to_c_class(tree, result_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/method_group.rb', line 25

def to_c_class(tree, result_var = nil)
  str_class_name = get_class_name(tree[1])
  container_tree = get_container_tree(tree[1])

  if container_tree == s(:self)
    method_group("
                VALUE superklass = rb_cObject;
                #{
                if tree[2] 
                  to_c tree[2], "superklass"
                end
                };
                VALUE tmpklass = rb_define_class(
                  #{str_class_name.inspect},
                  superklass
              );
    ", tree[3], result_var)
  else
    method_group("
                VALUE container_klass = Qnil;
                VALUE superklass = rb_cObject;
                
                #{
                if tree[2] 
                  to_c tree[2], "superklass"
                end
                };
                
                #{to_c(container_tree, "container_klass")};
                VALUE tmpklass = rb_define_class_under(
                  container_klass,
                  #{str_class_name.inspect},
                  superklass
              );
    ", tree[3], result_var)
  end
end

#to_c_colon2(tree, result_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/variable.rb', line 149

def to_c_colon2(tree, result_var = nil)
  code = proc{ "
    {
    VALUE klass = Qnil;
    
    #{to_c tree[1],"klass"};
        #{
        if result_var
          "#{result_var} = Qnil;"
        end
      }

  if (rb_is_const_id(#{intern_num tree[2]})) {
    switch (TYPE(klass)) {
      case T_CLASS:
      case T_MODULE:
        #{
        if result_var
          "#{result_var} = rb_const_get_from(klass, #{intern_num tree[2]});"
        else
          "return rb_const_get_from(klass, #{intern_num tree[2]});"
        end
        }
        break;
      default:
        #{_raise("rb_eTypeError","not a class/module")};
        break;
    }
  }
  else {
        #{
        if result_var
          "#{result_var} = rb_funcall(klass, #{intern_num tree[2]}, 0, 0);"
        else
          "return rb_funcall(klass, #{intern_num tree[2]}, 0, 0);"
        end
        }
  }
    
        #{
        unless result_var
          "return Qnil;"
        end
        }
    }
  "}
  
  if result_var
    code.call
  else
    inline_block &code
  end
end

#to_c_colon3(tree) ⇒ Object 



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# File 'lib/fastruby/translator/modules/variable.rb', line 144

def to_c_colon3(tree)
  "rb_const_get_from(rb_cObject, #{intern_num tree[1]})"
end

#to_c_cvar(tree) ⇒ Object 



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# File 'lib/fastruby/translator/modules/variable.rb', line 24

def to_c_cvar(tree)
  "rb_cvar_get(CLASS_OF(plocals->self) != rb_cClass ? CLASS_OF(plocals->self) : plocals->self,#{intern_num tree[1]})"
end

#to_c_cvasgn(tree, result_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/variable.rb', line 29

def to_c_cvasgn(tree, result_var = nil)
  if result_var
    "
      {
        VALUE recv = CLASS_OF(plocals->self) != rb_cClass ? CLASS_OF(plocals->self) : plocals->self;

        #{to_c tree[2], result_var};
        
        #{if RUBY_VERSION =~ /^1\.9/
          "rb_cvar_set(recv,#{intern_num tree[1]},#{result_var});"
          elsif RUBY_VERSION =~ /^1\.8/
          "rb_cvar_set(recv,#{intern_num tree[1]},#{result_var},Qfalse);"
          else
            raise RuntimeError, "unsupported ruby version #{RUBY_VERSION}"
          end 
        }
      }
   "
  else
  "__rb_cvar_set(CLASS_OF(plocals->self) != rb_cClass ? CLASS_OF(plocals->self) : plocals->self,#{intern_num tree[1]},#{to_c tree[2]},Qfalse)"
  end
end

#to_c_defined(tree) ⇒ Object 



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# File 'lib/fastruby/translator/modules/variable.rb', line 260

def to_c_defined(tree)
  nt = tree[1].node_type

  if nt == :self
  'rb_str_new2("self")'
  elsif nt == :true
  'rb_str_new2("true")'
  elsif nt == :false
  'rb_str_new2("false")'
  elsif nt == :nil
  'rb_str_new2("nil")'
  elsif nt == :lvar
  'rb_str_new2("local-variable")'
  elsif nt == :gvar
  "rb_gvar_defined((struct global_entry*)#{global_entry(tree[1][1])}) ? #{literal_value "global-variable"} : Qnil"
  elsif nt == :const
  "rb_const_defined(rb_cObject, #{intern_num tree[1][1]}) ? #{literal_value "constant"} : Qnil"
  elsif nt == :call
    if RUBY_VERSION =~ /^1\.8/
    "rb_method_node(CLASS_OF(#{to_c tree[1][1]}), #{intern_num tree[1][2]}) ? #{literal_value "method"} : Qnil"
    else
    "rb_method_entry(CLASS_OF(#{to_c tree[1][1]}), #{intern_num tree[1][2]}) ? #{literal_value "method"} : Qnil"
    end
  elsif nt == :yield
    "rb_block_given_p() ? #{literal_value "yield"} : Qnil"
  elsif nt == :ivar
  "rb_ivar_defined(plocals->self,#{intern_num tree[1][1]}) ? #{literal_value "instance-variable"} : Qnil"
  elsif nt == :attrset or
        nt == :op_asgn1 or
        nt == :op_asgn2 or
        nt == :op_asgn_or or
        nt == :op_asgn_and or
        nt == :op_asgn_masgn or
        nt == :masgn or
        nt == :lasgn or
        nt == :dasgn or
        nt == :dasgn_curr or
        nt == :gasgn or
        nt == :iasgn or
        nt == :cdecl or
        nt == :cvdecl or
        nt == :cvasgn
    literal_value "assignment"
  else
    literal_value "expression"
  end
end

#to_c_defn(tree, result_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/defn.rb', line 25

def to_c_defn(tree, result_var = nil)

  method_name = tree[1]
  args_tree = tree[2].select{|x| x.to_s[0] != ?&}
  
  global_klass_variable = add_global_name("VALUE", "Qnil");

  hash = Hash.new
  value_cast = ( ["VALUE"]*(args_tree.size+2) ).join(",")
  
  strmethodargs = "self,block,(VALUE)&frame"
  
  anonymous_method_name = anonymous_dispatcher(global_klass_variable, method_name)
  alt_options = options.dup

  alt_options.delete(:self)
  alt_options.delete(:main)

  code = "
  
  
    if (rb_obj_is_kind_of(plocals->self, rb_cClass) || rb_obj_is_kind_of(plocals->self, rb_cModule)) {
      rb_define_method(plocals->self, #{method_name.to_s.inspect}, #{anonymous_method_name}, -1);
      
      #{global_klass_variable} = plocals->self;
      // set tree
      rb_funcall(#{literal_value FastRuby}, #{intern_num :set_tree}, 5,
              #{global_klass_variable},
              rb_str_new2(#{method_name.to_s.inspect}),
              #{literal_value tree},
              #{literal_value snippet_hash},
              #{literal_value alt_options}
  
              );
      
    } else {
      VALUE obj = plocals->self;
      rb_define_singleton_method(obj, #{method_name.to_s.inspect}, #{anonymous_method_name}, -1 );
      
      #{global_klass_variable} = CLASS_OF(obj);
      // set tree
      rb_funcall(#{literal_value FastRuby}, #{intern_num :set_tree}, 5,
              #{global_klass_variable},
              rb_str_new2(#{method_name.to_s.inspect}),
              #{literal_value tree},
              #{literal_value snippet_hash},
              #{literal_value alt_options}
  
              );
    }
    
    "

  if result_var
    code + "\n#{result_var} = Qnil;"
  else
    inline_block code + "\nreturn Qnil;\n"
  end
end

#to_c_defs(tree, result_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/defn.rb', line 86

def to_c_defs(tree, result_var = nil)
  method_name = tree[2]
  args_tree = tree[3].select{|x| x.to_s[0] != ?&}
  
  global_klass_variable = add_global_name("VALUE", "Qnil");

  hash = Hash.new
  value_cast = ( ["VALUE"]*(args_tree.size+2) ).join(",")
  
  strmethodargs = "self,block,(VALUE)&frame"
  
  anonymous_method_name = anonymous_dispatcher(global_klass_variable, method_name)

  alt_options = options.dup

  alt_options.delete(:self)
  alt_options.delete(:main)

  code = "
  
    VALUE obj = Qnil;
    #{to_c tree[1], "obj"};
    rb_define_singleton_method(obj, #{method_name.to_s.inspect}, #{anonymous_method_name}, -1 );
    
    #{global_klass_variable} = CLASS_OF(obj);
    // set tree
    rb_funcall(#{literal_value FastRuby}, #{intern_num :set_tree}, 5,
            #{global_klass_variable},
            rb_str_new2(#{method_name.to_s.inspect}),
            #{literal_value tree},
            #{literal_value snippet_hash},
            #{literal_value alt_options}

            );

    "

  if result_var
    code + "\n#{result_var} = Qnil;"
  else
    inline_block code + "\nreturn Qnil;\n"
  end
    
end

#to_c_dot2(tree, result_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/literal.rb', line 114

def to_c_dot2(tree, result_var = nil)
  
  begin_var = "_begin"+rand(10000000).to_s
  end_var = "_end"+rand(10000000).to_s
  
  if result_var
    "
    {
      VALUE #{begin_var} = Qnil;
      VALUE #{end_var} = Qnil;
      
      #{to_c tree[1], begin_var};
      #{to_c tree[2], end_var};
      
      #{result_var} = rb_range_new(#{begin_var}, #{end_var},0);
    }
    "
  else
    if result_var
    "
      {
      VALUE #{begin_var} = Qnil;
      VALUE #{end_var} = Qnil;
      #{to_c tree[1], begin_var};
      #{to_c tree[2], end_var};
      
      #{result_var} = rb_range_new(#{begin_var}, #{end_var},0)
      }
    "
    else
    "rb_range_new(#{to_c tree[1]}, #{to_c tree[2]},0)"
    end
  end
end

#to_c_ensure(tree) ⇒ Object 



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# File 'lib/fastruby/translator/modules/exceptions.rb', line 99

def to_c_ensure(tree)
  if tree.size == 2
    to_c tree[1]
  else
    ensured_code = to_c tree[2]
    inline_block {
      "#{frame(to_c(tree[1]),ensured_code,ensured_code,1)};"
    }
  end
end

#to_c_gasgn(tree, result_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/variable.rb', line 62

def to_c_gasgn(tree, result_var = nil)
  if result_var
      "
      {
      #{to_c tree[2], result_var}; 
      rb_gvar_set((void*)#{global_entry(tree[1])},#{result_var});
      }
      "
  else
  "_rb_gvar_set((void*)#{global_entry(tree[1])}, #{to_c tree[2]})"
  end
end

#to_c_gvar(tree) ⇒ Object 



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# File 'lib/fastruby/translator/modules/variable.rb', line 53

def to_c_gvar(tree)
  if (tree[1] == :$!)
    "pframe->thread_data->exception"
  else
    "rb_gvar_get((struct global_entry*)#{global_entry(tree[1])})"
  end
end

#to_c_hash(tree, result_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/literal.rb', line 29

def to_c_hash(tree, result_var = nil)
  
  hash_tmp_var = "_hash_"+rand(1000000).to_s
  key_tmp_var = "_key_"+rand(1000000).to_s
  value_tmp_var = "_value_"+rand(1000000).to_s

  code = proc{ 
  hash_aset_code = ""
  (0..(tree.size-3)/2).each do |i|
    strkey = to_c tree[1 + i * 2]
    strvalue = to_c tree[2 + i * 2]
    hash_aset_code << "
      {
        VALUE #{key_tmp_var} = Qnil;
        VALUE #{value_tmp_var} = Qnil;
        
        #{to_c tree[1 + i * 2], key_tmp_var};
        #{to_c tree[2 + i * 2], value_tmp_var};
        
        rb_hash_aset(#{hash_tmp_var}, #{key_tmp_var}, #{value_tmp_var});
      }
    "
  end
  
      "
      {
      VALUE #{hash_tmp_var} = rb_hash_new();
      #{hash_aset_code};
      #{
      if result_var
        "#{result_var} = #{hash_tmp_var}"
      else
        "return #{hash_tmp_var}"
      end
      };
      }
    "}
    
  if result_var
    code.call
  else
    inline_block &code
  end
end

#to_c_iasgn(tree, result_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/variable.rb', line 81

def to_c_iasgn(tree, result_var = nil)
  if result_var
      "
      {
      #{to_c tree[2], result_var}; 
      rb_ivar_set(#{locals_accessor}self,#{intern_num tree[1]},#{result_var});
      }
      "
  else
    "_rb_ivar_set(#{locals_accessor}self,#{intern_num tree[1]},#{to_c tree[2]})"
  end
end

#to_c_if(tree, result_variable_ = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/flow.rb', line 24

def to_c_if(tree, result_variable_ = nil)
  condition_tree = tree[1]
  impl_tree = tree[2]
  else_tree = tree[3]
  
  result_variable = result_variable_ || "last_expression"
  
  infered_value = infer_value(condition_tree)
  unless infered_value
    
    code = proc{"
      {
        VALUE condition_result;
        #{to_c condition_tree, "condition_result"};
        if (RTEST(condition_result)) {
          #{to_c impl_tree, result_variable};
        }#{else_tree ?
          " else {
          #{to_c else_tree, result_variable};
          }
          " : ""
        }
      }
    "}
  
    if result_variable_
      code.call
    else
      inline_block { code.call + "; return last_expression;" }
    end
  else
    if infered_value.value
      to_c(impl_tree, result_variable_)
    else
      if else_tree
        to_c(else_tree, result_variable_)
      else
        to_c(s(:nil), result_variable_)
      end
    end
  end
end

#to_c_iter(tree, result_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/iter.rb', line 25

def to_c_iter(tree, result_var = nil)

  call_tree = tree[1]
  args_tree = tree[2]
  recv_tree = call_tree[1]

  directive_code = directive(call_tree)
  if directive_code
    if result_var
      return "#{result_var} = #{directive_code};\n"
    else
      return directive_code
    end
  end

  other_call_tree = call_tree.dup
  other_call_tree[1] = s(:lvar, :arg)

  mname = call_tree[2]

  call_args_tree = call_tree[3]

  caller_code = nil

  recvtype = infer_type(recv_tree || s(:self))

  address = nil
  mobject = nil
  len = nil

  if recvtype

    inference_complete = true
    signature = [recvtype]

    call_args_tree[1..-1].each do |arg|
      argtype = infer_type(arg)
      if argtype
        signature << argtype
      else
        inference_complete = false
      end
    end
  end

  anonymous_impl = tree[3]

  str_lvar_initialization = "#{@frame_struct} *pframe;
                             #{@locals_struct} *plocals;
                            pframe = (void*)param;
                            plocals = (void*)pframe->plocals;
                            "

  str_arg_initialization = ""

  str_impl = ""
  on_block do
    str_impl = to_c(anonymous_impl, "last_expression")
  end     

    if not args_tree
    elsif args_tree.first == :lasgn
      if RUBY_VERSION =~ /^1\.8/
        str_arg_initialization << "plocals->#{args_tree[1]} = arg;"
      elsif RUBY_VERSION =~ /^1\.9/
        str_arg_initialization << "
          if (TYPE(arg) != T_ARRAY) {
            plocals->#{args_tree[1]} = arg;
          } else {
            plocals->#{args_tree[1]} = rb_ary_entry(arg,0);
          }
          "
      end
    elsif args_tree.first == :masgn
      
      if RUBY_VERSION =~ /^1\.8/
        str_arg_initialization << "
            {
              if (TYPE(arg) != T_ARRAY) {
                if (arg != Qnil) {
                  arg = rb_ary_new4(1,&arg);
                } else {
                  arg = rb_ary_new2(0);
                }
              } else if (_RARRAY_LEN(arg) <= 1) {
                arg = rb_ary_new4(1,&arg);
              }
            }
            "
      elsif RUBY_VERSION =~ /^1\.9/
        str_arg_initialization << "
            {
            }
            "
      end
      
      arguments = args_tree[1][1..-1]
      
      (0..arguments.size-1).each do |i|
        arg = arguments[i]
        if arg[0] == :lasgn 
          str_arg_initialization << "plocals->#{arguments[i].last} = rb_ary_entry(arg,#{i});\n"
        elsif arg[0] == :splat
          str_arg_initialization << "plocals->#{arg.last.last} = rb_ary_new2(_RARRAY_LEN(arg)-#{i});\n
          
            int i;
            for (i=#{i};i<_RARRAY_LEN(arg);i++){
              rb_ary_store(plocals->#{arg.last.last},i-#{i},rb_ary_entry(arg,i));
            }
           "
        end
      end
    end
      str_recv = "pframe->next_recv"
      str_recv = "plocals->self" unless recv_tree

      strargs = if call_args_tree.size > 1
                  "," + (0..call_args_tree.size-2).map{|i| "arg#{i}"}.join(",")
              else
                ""
              end
      
      str_evaluate_args = ""

        rb_funcall_caller_code = proc { |name, call_type| "
          static VALUE #{name}(VALUE param) {
            // call to #{call_tree[2]}
             VALUE last_expression = Qnil;
  
            #{str_lvar_initialization}
            #{str_evaluate_args};
            
          VALUE ret = rb_funcall(#{str_recv}, #{intern_num call_tree[2]}, #{call_args_tree.size-1} #{strargs});
            #{
            if call_type == :lambda
          "

          // freeze all stacks
          struct FASTRUBYTHREADDATA* thread_data = rb_current_thread_data();

          if (thread_data != 0) {
            VALUE rb_stack_chunk = thread_data->rb_stack_chunk;

            // add reference to stack chunk to lambda object
            rb_ivar_set(ret,#{intern_num :_fastruby_stack_chunk},rb_stack_chunk);

            // freeze the complete chain of stack chunks
            while (rb_stack_chunk != Qnil) {
              struct STACKCHUNK* stack_chunk;
              Data_Get_Struct(rb_stack_chunk,struct STACKCHUNK,stack_chunk);

              stack_chunk_freeze(stack_chunk);

              rb_stack_chunk = rb_ivar_get(rb_stack_chunk,#{intern_num :_parent_stack_chunk});
            }
          }
          "
          end
        }
          return ret;
          }
        "
        }


      if call_args_tree.size > 1
        if call_args_tree.last[0] == :splat
          rb_funcall_caller_code = proc { |name,call_type| "
            static VALUE #{name}(VALUE param) {
              // call to #{call_tree[2]}
  
              VALUE last_expression = Qnil;
              #{str_lvar_initialization}
              
              VALUE array = Qnil;
              
              #{to_c call_args_tree.last[1], "array"};
              
              if (TYPE(array) != T_ARRAY) {
                array = rb_ary_new4(1,&array);
              }
              
              int argc = #{call_args_tree.size-2};
              VALUE argv[#{call_args_tree.size} + _RARRAY_LEN(array)];
              
              VALUE aux_ = Qnil;;
              #{
                i = -1
                call_args_tree[1..-2].map {|arg|
                  i = i + 1
                  "
                  #{to_c arg, "aux_"};
                  argv[#{i}] = aux_;
                  "
                }.join(";\n")
              };
              
              int array_len = _RARRAY_LEN(array);
              
              int i;
              for (i=0; i<array_len;i++) {
                argv[argc] = rb_ary_entry(array,i);
                argc++; 
              }
              
              return rb_funcall2(#{str_recv}, #{intern_num call_tree[2]}, argc, argv);
            }
          "
          }   
        else
          str_evaluate_args = "
              #{
                (0..call_args_tree.size-2).map{|i|
                  "VALUE arg#{i} = Qnil;"
                }.join("\n")
              }
              
              #{
                (0..call_args_tree.size-2).map{|i|
                  to_c(call_args_tree[i+1], "arg#{i}")+";"
                }.join("\n")
              }
          "
        end
      end

    argument_array_read = "
        VALUE arg;
        #{
        # TODO: access directly to argc and argv for optimal execution
        if RUBY_VERSION =~ /^1\.9/ 
          "
            if (TYPE(arg_) == T_ARRAY) {
              if (_RARRAY_LEN(arg_) <= 1) {
                arg = rb_ary_new4(argc,argv);
              } else {
                arg = arg_;
              }
            } else {
              arg = rb_ary_new4(argc,argv);
            }
          "
        else
          "arg = arg_;"
        end
        }
    "
    
    rb_funcall_block_code = proc { |name,call_type| "
      static VALUE #{name}(VALUE arg_, VALUE _plocals, int argc, VALUE* argv) {
        // block for call to #{call_tree[2]}
        #{argument_array_read}

        volatile VALUE last_expression = Qnil;

        #{@frame_struct} frame;
        #{@frame_struct} * volatile pframe = (void*)&frame;
        #{@locals_struct} * volatile plocals = (void*)_plocals;

        frame.plocals = plocals;
        frame.parent_frame = 0;
        frame.return_value = Qnil;
        frame.rescue = 0;
        frame.targetted = 0;
        frame.thread_data = rb_current_thread_data();

        #{str_arg_initialization}

        #{
        if call_type == :lambda or call_type == :proc_new
        "
          void* volatile old_call_frame = ((typeof(plocals))(pframe->plocals))->call_frame;
          ((typeof(plocals))(pframe->plocals))->call_frame = pframe;
        "
        end
        }

        int aux = setjmp(frame.jmp);
        if (aux != 0) {

            if (aux == FASTRUBY_TAG_NEXT) {
              last_expression = pframe->thread_data->accumulator;
              goto fastruby_local_next;
            } else if (aux == FASTRUBY_TAG_REDO) {
              // do nothing and let execute the block again
#{
if call_type == :lambda
"

            } else if (aux == FASTRUBY_TAG_BREAK) {
              last_expression = frame.return_value;
              goto fastruby_local_next;
"
end
}
#{
if call_type == :lambda or call_type == :proc_new
"
            } else if (aux == FASTRUBY_TAG_RAISE) {
               rb_funcall(((typeof(plocals))(pframe->plocals))->self, #{intern_num :raise}, 1, frame.thread_data->exception);
               return Qnil;
"
end
}
            } else {
#{
case call_type
when :proc_new
"
_local_return:
                  if (plocals->targetted == 1) {
                    if (plocals->active == Qfalse) {
                      rb_raise(rb_eLocalJumpError,\"return from proc-closure\");
                    } else {
                      ((typeof(plocals))(pframe->plocals))->call_frame = old_call_frame;
                      frb_jump_tag(aux);
                    }
                  } else {
                    rb_raise(rb_eLocalJumpError, \"unexpected return\");
                  }
"
when :lambda
"
              if (aux == FASTRUBY_TAG_RETURN) {
                if (plocals->targetted == 1) {
                  last_expression = ((typeof(plocals))(pframe->plocals))->return_value;
                  goto fastruby_local_next;

                } else {
                  rb_raise(rb_eLocalJumpError, \"unexpected return\");
                }
              } else {
                rb_raise(rb_eLocalJumpError, \"unexpected return\");
              }
"
else
  "
              frb_jump_tag(aux);
              return frame.return_value;
  "
end
}

            }
        }

      #{
      if call_type == :callcc
      "
        if (rb_obj_is_kind_of(arg, rb_const_get(rb_cObject, #{intern_num :Continuation}))) {
          struct FASTRUBYTHREADDATA* thread_data = frame.thread_data;
          rb_ivar_set(arg,#{intern_num :__stack_chunk},thread_data->rb_stack_chunk);
        }
      "
      end
      }

fastruby_local_redo:
        #{str_impl};

#{
case call_type
when :proc_new
"
        return last_expression;
local_return:
        aux = FASTRUBY_TAG_RETURN;
        plocals->return_value = last_expression;
        plocals->targetted = 1;
        goto _local_return;
"
when :lambda
"
local_return:
"
else
" 
        return last_expression;
local_return:            
        plocals->return_value = last_expression;
        plocals->targetted = 1;
        frb_jump_tag(FASTRUBY_TAG_RETURN);
"
end
}


fastruby_local_next:
#{
if call_type == :proc_new or call_type == :lambda
"
  ((typeof(plocals))(pframe->plocals))->call_frame = old_call_frame;
"
end
}
        return last_expression;          
        }
    "
    }

    fastruby_str_arg_initialization = ""

    if not args_tree
      fastruby_str_arg_initialization = ""
    elsif args_tree.first == :lasgn
      fastruby_str_arg_initialization = "plocals->#{args_tree[1]} = argv[0];"
    elsif args_tree.first == :masgn
      arguments = args_tree[1][1..-1]
      
      (0..arguments.size-1).each do |i|
        arg = arguments[i]
        if arg[0] == :lasgn 
          fastruby_str_arg_initialization << "plocals->#{arg.last} = #{i} < argc ? argv[#{i}] : Qnil;\n"
        elsif arg[0] == :splat
          fastruby_str_arg_initialization << "plocals->#{arg.last.last} = rb_ary_new2(#{arguments.size-1-i});\n
          {
            int i;
            for (i=#{i};i<argc;i++){
              rb_ary_store(plocals->#{arg.last.last},i-#{i},argv[i]);
            }
          }
           "
        end 
      end
    end

    block_code = proc { |name| "
      static VALUE #{name}(int argc, VALUE* argv, VALUE _locals, VALUE _parent_frame) {
        // block for call to #{call_tree[2]}
        volatile VALUE last_expression = Qnil;
        #{@frame_struct} frame;
        #{@frame_struct} * volatile pframe = (void*)&frame;
        #{@frame_struct} * volatile parent_frame = (void*)_parent_frame;
        #{@locals_struct} * volatile plocals;

        frame.plocals = (void*)_locals;
        frame.parent_frame = parent_frame;
        frame.return_value = Qnil;
        frame.rescue = 0;
        frame.targetted = 0;
        frame.thread_data = parent_frame->thread_data;
        if (frame.thread_data == 0) frame.thread_data = rb_current_thread_data();

        plocals = frame.plocals;

        #{fastruby_str_arg_initialization}

        int aux = setjmp(frame.jmp);
        if (aux != 0) {
            if (pframe->targetted == 0) {
              if (aux == FASTRUBY_TAG_NEXT) {
                return pframe->thread_data->accumulator;
              } else if (aux == FASTRUBY_TAG_REDO) {
                // do nothing and let execute the block again
              } else {
                longjmp(((typeof(pframe))_parent_frame)->jmp,aux);
              }
            }

        }

fastruby_local_redo:
        #{str_impl};

        return last_expression;
local_return:
        plocals->return_value = last_expression;
        plocals->targetted = 1;
        longjmp(pframe->jmp, FASTRUBY_TAG_RETURN);
fastruby_local_next:
        return last_expression;          }
    "
    }

    caller_code = nil
    convention_global_name = add_global_name("int",0)
    
      precode = "
          struct FASTRUBYTHREADDATA* thread_data = 0;
          VALUE saved_rb_stack_chunk = Qnil;
          
          VALUE next_recv = plocals->self;
          
          #{
            if recv_tree
              to_c recv_tree, "next_recv"
            end
          };

          pframe->next_recv = next_recv;
#ifdef RUBY_1_8
          NODE* node = rb_method_node(CLASS_OF(pframe->next_recv), #{intern_num mname});
#endif              
#ifdef RUBY_1_9
          void* node = rb_method_entry(CLASS_OF(pframe->next_recv), #{intern_num mname});
#endif              

          if (node == #{@callcc_node_gvar}) {
            
            // freeze all stacks
            thread_data = rb_current_thread_data();
  
            if (thread_data != 0) {
              VALUE rb_stack_chunk = thread_data->rb_stack_chunk;
              saved_rb_stack_chunk = rb_stack_chunk;

              // freeze the complete chain of stack chunks
              while (rb_stack_chunk != Qnil) {
                struct STACKCHUNK* stack_chunk;
                Data_Get_Struct(rb_stack_chunk,struct STACKCHUNK,stack_chunk);
  
                stack_chunk_freeze(stack_chunk);
  
                rb_stack_chunk = rb_ivar_get(rb_stack_chunk,#{intern_num :_parent_stack_chunk});
              }
            }
          }
        "
      
      postcode = "
          if (node == #{@callcc_node_gvar}) {
            thread_data->rb_stack_chunk = saved_rb_stack_chunk;  
          }
      "              
      
    
      funcall_call_code = "
      #{
        frame_call(
          "ret = " + protected_block("
          
          void* caller_func;
          void* block_func;
          typeof(plocals) current_plocals;
          
          if (pframe->thread_data == 0) pframe->thread_data = rb_current_thread_data();
          void* last_plocals = pframe->thread_data->last_plocals;

#ifdef RUBY_1_8
          NODE* node = rb_method_node(CLASS_OF(pframe->next_recv), #{intern_num mname});
#endif
#ifdef RUBY_1_9
          void* node = rb_method_entry(CLASS_OF(pframe->next_recv), #{intern_num mname});
#endif

          if (
            node == #{@proc_node_gvar} ||
            node == #{@lambda_node_gvar}
            )  {

            caller_func = #{anonymous_function(:lambda,&rb_funcall_caller_code)};
            block_func = #{anonymous_function(:lambda,&rb_funcall_block_code)};
          } else if (node == #{@procnew_node_gvar} && pframe->next_recv == rb_cProc) {
            caller_func = #{anonymous_function(:lambda,&rb_funcall_caller_code)};
            block_func = #{anonymous_function(:proc_new,&rb_funcall_block_code)};
          } else if (node == #{@callcc_node_gvar}) {
            caller_func = #{anonymous_function(:normal,&rb_funcall_caller_code)};
            block_func = #{anonymous_function(:callcc,&rb_funcall_block_code)};
          } else {
            caller_func = #{anonymous_function(:normal,&rb_funcall_caller_code)};
            block_func = #{anonymous_function(:normal,&rb_funcall_block_code)};
          }
          

          last_expression = rb_iterate(
            caller_func,
            (VALUE)pframe,
            block_func,
            (VALUE)plocals);

          if (node == #{@callcc_node_gvar}) {
  
            // remove active flags of abandoned stack
            current_plocals = pframe->thread_data->last_plocals;
            while (current_plocals) {
              current_plocals->active = Qfalse;
              current_plocals = (typeof(current_plocals))(current_plocals->parent_locals); 
            }
            
            // restore last_plocals
            pframe->thread_data->last_plocals = last_plocals;
            
            // mark all scopes as active
            current_plocals = last_plocals;
            
            while (current_plocals) {
              current_plocals->active = Qtrue;
              current_plocals = (typeof(current_plocals))(current_plocals->parent_locals); 
            }
          }
          ", true), precode, postcode
        )
      };
      "        

  recvtype = nil if call_args_tree.size > 1 ? call_args_tree.last[0] == :splat : false
  unless recvtype
    if result_var
      "#{result_var} = #{funcall_call_code};"
    else
      funcall_call_code
    end
  else
    encoded_address = encode_address(recvtype,signature,mname,call_tree,inference_complete,convention_global_name)

    if call_args_tree.size > 1
      strargs = (0..call_args_tree.size-2).map{|i| "arg#{i}"}.join(",")
    else
      strargs = ""
    end

    fastruby_call_code = "
            // call to #{call_tree[2]}
            #{
            if call_args_tree.size > 1
              str_evaluate_args
            end
            };
            
            VALUE recv = plocals->self;
            
            #{
            if recv_tree
             to_c recv_tree, "recv" 
            end
            } 

            ret = ((VALUE(*)(VALUE,VALUE,VALUE,int,VALUE*))#{encoded_address})(recv, (VALUE)&block, (VALUE)&call_frame, #{call_args_tree.size-1}, (VALUE[]){#{strargs}});
        "
    
    code = "
      if (#{@last_address_name} == 0) {
        return #{funcall_call_code};
      } else {
        #{if recvtype and inference_complete
          "if (*#{@last_address_name} == 0) {
            rb_funcall(#{literal_value recvtype},#{intern_num :build}, 2, #{literal_value signature}, #{literal_value mname});
          }
          "
        end
        }
        if (*#{@last_address_name} == 0) {
          return #{funcall_call_code};
        } else {
          #{fastruby_call_code}
        }
      }
    "
    
    fastruby_precode = "                 #{@block_struct} block;

            block.block_function_address = ((void*)#{anonymous_function(&block_code)});
            block.block_function_param = ((void*)plocals);
            block.proc = Qnil;                
            "
    
    if result_var
      "#{result_var} = #{frame_call(code,fastruby_precode,"")}"
    else
      frame_call(code,fastruby_precode,"")
    end
    
  end
end

#to_c_ivar(tree) ⇒ Object 



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# File 'lib/fastruby/translator/modules/variable.rb', line 76

def to_c_ivar(tree)
  "rb_ivar_get(#{locals_accessor}self,#{intern_num tree[1]})"
end

#to_c_lasgn(tree, result_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/variable.rb', line 204

def to_c_lasgn(tree, result_var = nil)
  code = "
      {
        #{to_c tree[2], result_var};
        #{locals_accessor}#{tree[1]} = #{result_var};
       }
       "

  if result_var
    if options[:validate_lvar_types]
      klass = @infer_lvar_map[tree[1]]
      if klass
        "
        {
          #{to_c tree[2], result_var};
          if (CLASS_OF(#{result_var})!=#{literal_value klass}) {
            #{_raise(literal_value(FastRuby::TypeMismatchAssignmentException), "Illegal assignment at runtime (type mismatch)")};
          }
          #{locals_accessor}#{tree[1]} = #{result_var};
        }
       "
      else
        code
      end
    else
      code
    end
  else
    if options[:validate_lvar_types]
      klass = @infer_lvar_map[tree[1]]
      if klass
        verify_type_function = proc { |name| "
          static VALUE #{name}(VALUE arg, void* pframe ) {
            if (CLASS_OF(arg)!=#{literal_value klass}) {
              #{_raise(literal_value(FastRuby::TypeMismatchAssignmentException), "Illegal assignment at runtime (type mismatch)")};
            }
            return arg;
          }
        "
        }
        
        "_lvar_assing(&#{locals_accessor}#{tree[1]}, #{anonymous_function(&verify_type_function)}(#{to_c tree[2]},pframe))"
      else
        "_lvar_assing(&#{locals_accessor}#{tree[1]},#{to_c tree[2]})"
      end
    else
      "_lvar_assing(&#{locals_accessor}#{tree[1]},#{to_c tree[2]})"
    end
  end
end

#to_c_method(tree, signature = nil) ⇒ Object 



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# File 'lib/fastruby/translator/translator.rb', line 436

def to_c_method(tree, signature = nil)
  
  if tree[0] == :defn
    method_name = tree[1]
    original_args_tree = tree[2]
    block_argument = tree[2].find{|x| x.to_s[0] == ?&}
    impl_tree = tree[3][1]
  elsif tree[0] == :defs
    method_name = tree[2]
    original_args_tree = tree[3]
    block_argument = tree[3].find{|x| x.to_s[0] == ?&}
    impl_tree = tree[4][1]
  end
  
  args_tree = original_args_tree.select{|x| x.to_s[0] != ?&}

    initialize_method_structs(original_args_tree)
    
    if options[:main] then
      strargs = if args_tree.size > 1
        "VALUE self, VALUE block, VALUE _parent_frame, #{(0..signature.size-1).map{|x| "VALUE arg#{x}"}.join(",")}"
      else
        "VALUE self, VALUE block, VALUE _parent_frame"
      end

    else
      
      strargs = "VALUE self, VALUE block, VALUE _parent_frame, int argc, VALUE* argv"
      
      splat_arg = args_tree[1..-1].find{|x| x.to_s.match(/\*/) }
  
      maxargnum = args_tree[1..-1].count{ |x|
          if x.instance_of? Symbol
            not x.to_s.match(/\*/) and not x.to_s.match(/\&/)
          else
            false
          end
        }
        
      minargnum = maxargnum
        
      args_tree[1..-1].each do |subtree|
        unless subtree.instance_of? Symbol
          if subtree[0] == :block
            minargnum = minargnum - (subtree.size-1)
          end
        end
      end
      
      if args_tree[1..-1].find{|x| x.to_s.match(/\*/)}
        maxargnum = 2147483647
      end
      
      read_arguments_code = ""
  
  
      validate_arguments_code = if signature.size-1 < minargnum
          "
            rb_raise(rb_eArgError, \"wrong number of arguments (#{signature.size-1} for #{minargnum})\");
          "
      elsif signature.size-1 > maxargnum
          "
            rb_raise(rb_eArgError, \"wrong number of arguments (#{signature.size-1} for #{maxargnum})\");
          "
      else
  
          default_block_tree = args_tree[1..-1].find{|subtree|
            unless subtree.instance_of? Symbol
              if subtree[0] == :block
                next true
              end
            end
  
            false
          }
          
          i = -1
  
          normalargsnum = args_tree[1..-1].count{|subtree|
            if subtree.instance_of? Symbol
              unless subtree.to_s.match(/\*/) or subtree.to_s.match(/\&/)
                next true
              end
            end
                  
            false
          }
  
          read_arguments_code = args_tree[1..-1].map { |arg_|
              arg = arg_.to_s
              i = i + 1
  
              if i < normalargsnum
                if i < signature.size-1
                  "plocals->#{arg} = argv[#{i}];\n"
                else
                    
                  if default_block_tree
                    initialize_tree = default_block_tree[1..-1].find{|subtree| subtree[1] == arg_}
                    if initialize_tree
                      to_c(initialize_tree) + ";\n"
                    else
                      ""
                    end
                  else
                      ";\n"
                  end
                end
              else
                ""
              end
            }.join("")
            
          if splat_arg
                if signature.size-1 < normalargsnum then
                  read_arguments_code << "
                    plocals->#{splat_arg.to_s.gsub("*","")} = rb_ary_new3(0);
                    "
                else
                  read_arguments_code << "
                    plocals->#{splat_arg.to_s.gsub("*","")} = rb_ary_new4(
                          #{(signature.size-1) - (normalargsnum)}, argv+#{normalargsnum} 
                          );
                  "
                end
  
          end
        
        
          ""
      end
  
      if block_argument
  
        proc_reyield_block_tree = s(:iter, s(:call, nil, :proc, s(:arglist)), s(:masgn, s(:array, s(:splat, s(:lasgn, :__xproc_arguments)))), s(:yield, s(:splat, s(:lvar, :__xproc_arguments))))
  
        require "fastruby/sexp_extension"
  
        read_arguments_code << "
          if (pblock ? pblock->proc != Qnil : 0) {
            plocals->#{block_argument.to_s.gsub("&","")} = pblock->proc;
          } else {
            plocals->#{block_argument.to_s.gsub("&","")} = #{to_c FastRuby::FastRubySexp.from_sexp(proc_reyield_block_tree)};
          }
        "

        read_arguments_code << "
          if (pblock) {
          rb_ivar_set(plocals->#{block_argument.to_s.gsub("&","")},
                    #{intern_num "__block_address"}, PTR2NUM(pblock->block_function_address)); 
          rb_ivar_set(plocals->#{block_argument.to_s.gsub("&","")},
                    #{intern_num "__block_param"}, PTR2NUM(pblock->block_function_param));            
          }            

        "
      end

    end

    require "fastruby/sexp_extension"       
    scope_mode = FastRuby::ScopeModeHelper.get_scope_mode(tree)

    ret = "VALUE #{@alt_method_name || method_name}(#{options[:main] ? "VALUE self" : strargs}) {
      #{validate_arguments_code}

      #{@frame_struct} frame;
      #{@frame_struct} * volatile pframe;
      
      frame.parent_frame = #{options[:main] ? "0"  : "(void*)_parent_frame"};
      frame.return_value = Qnil;
      frame.rescue = 0;
      frame.targetted = 0;
      frame.thread_data = #{options[:main] ? "0" : "((typeof(pframe))_parent_frame)->thread_data"};
      if (frame.thread_data == 0) frame.thread_data = rb_current_thread_data();

      int stack_chunk_instantiated = 0;
      
#{
if scope_mode == :dag
  " 
      volatile VALUE rb_previous_stack_chunk = Qnil;
      VALUE rb_stack_chunk = frame.thread_data->rb_stack_chunk;
      struct STACKCHUNK* volatile stack_chunk = 0;

      if (rb_stack_chunk != Qnil) {
        Data_Get_Struct(rb_stack_chunk,struct STACKCHUNK,stack_chunk);
      }

      if (stack_chunk == 0 || (stack_chunk == 0 ? 0 : stack_chunk_frozen(stack_chunk)) ) {
        rb_previous_stack_chunk = rb_stack_chunk;
        rb_gc_register_address(&rb_stack_chunk);
        stack_chunk_instantiated = 1;

        rb_stack_chunk = rb_stack_chunk_create(Qnil);
        frame.thread_data->rb_stack_chunk = rb_stack_chunk;

        rb_ivar_set(rb_stack_chunk, #{intern_num :_parent_stack_chunk}, rb_previous_stack_chunk);

        Data_Get_Struct(rb_stack_chunk,struct STACKCHUNK,stack_chunk);
      }

      #{@locals_struct}* volatile plocals;

      volatile int previous_stack_position = stack_chunk_get_current_position(stack_chunk);
      plocals = (typeof(plocals))stack_chunk_alloc(stack_chunk ,sizeof(typeof(*plocals))/sizeof(void*));
      
  "
else
  "
      #{@locals_struct} locals;
      typeof(locals) * volatile plocals = &locals;
  "
end
}

      plocals->parent_locals = (frame.thread_data->last_plocals);
      void* volatile old_parent_locals = frame.thread_data->last_plocals;
      
      #{
      if scope_mode == :dag 
        "frame.thread_data->last_plocals = plocals;\n"
      end
      }
      
      frame.plocals = plocals;
      plocals->active = Qtrue;
      plocals->targetted = Qfalse;
      plocals->pframe = (&frame);
      plocals->call_frame = (0);

      pframe = (void*)&frame;

      #{@block_struct} * volatile pblock;
      volatile VALUE last_expression = Qnil;

      int aux = setjmp(pframe->jmp);
      if (aux != 0) {
        plocals->active = Qfalse;

#{
if scope_mode == :dag
  " 
        stack_chunk_set_current_position(stack_chunk, previous_stack_position);

        if (stack_chunk_instantiated) {
          rb_gc_unregister_address(&rb_stack_chunk);
          frame.thread_data->rb_stack_chunk = rb_previous_stack_chunk;
        }
"
end
}            
        #{
        unless options[:main]
          "
          if (plocals->targetted == Qfalse || aux != FASTRUBY_TAG_RETURN) {
            frame.thread_data->last_plocals = old_parent_locals;
            
            longjmp(((typeof(pframe))_parent_frame)->jmp,aux);
          }
          "
        end
        }

        frame.thread_data->last_plocals = old_parent_locals;
        
        return plocals->return_value;
      }

      plocals->self = self;

      #{
      unless options[:main]
        "
        pblock = (void*)block;
        if (pblock) {
          plocals->block_function_address = pblock->block_function_address;
          plocals->block_function_param = pblock->block_function_param;
        } else {
          plocals->block_function_address = (0);
          plocals->block_function_param = 0;
        }
        "
      end
      }

      #{read_arguments_code}

      #{to_c impl_tree, "last_expression"};
      
local_return:
#{
if scope_mode == :dag
"
      stack_chunk_set_current_position(stack_chunk, previous_stack_position);

      if (stack_chunk_instantiated) {
        rb_gc_unregister_address(&rb_stack_chunk);
        frame.thread_data->rb_stack_chunk = rb_previous_stack_chunk;
      }
"
end
}
      plocals->active = Qfalse;
      
      frame.thread_data->last_plocals = old_parent_locals;
      
      return last_expression;
    }"

    add_main
    extra_code << ret
  
  "
    static VALUE dummy_#{method_name}_#{alt_method_name}_#{rand(1000000000000000000000000000000000)}(VALUE a) {
      return Qnil;
    }
  "
end

#to_c_module(tree, result_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/method_group.rb', line 64

def to_c_module(tree, result_var = nil)
  str_class_name = get_class_name(tree[1])
  container_tree = get_container_tree(tree[1])

  if container_tree == s(:self)
    method_group("
                  VALUE tmpklass = rb_define_module(#{str_class_name.inspect});
    ", tree[2], result_var)
  else
    method_group("
                  VALUE container_klass = Qnil;
                  
                  #{to_c(container_tree, "container_klass")};
                  VALUE tmpklass = rb_define_module_under(container_klass,#{str_class_name.inspect});
    ", tree[2], result_var)
  end
end

#to_c_next(tree, result_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/nonlocal.rb', line 118

def to_c_next(tree, result_var = nil)
  tmp_varname = "_acc_" + rand(10000000).to_s
  if @on_block
   code =proc {"
    {
      last_expression = Qnil;
      
      #{
      if tree[1]
        to_c(tree[1],"last_expression")
      end
      }
    pframe->thread_data->accumulator = last_expression;
    goto fastruby_local_next;
    }
    "}
    
    if result_var
      code.call
    else
      inline_block &code
    end
  else
    _raise("rb_eLocalJumpError","illegal next");
  end
end

#to_c_not(tree, return_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/logical.rb', line 60

def to_c_not(tree, return_var = nil)
  if return_var
    "
      {
        VALUE op1 = Qnil;
        #{to_c tree[1], "op1"};
        #{return_var} = (RTEST(op1)) ? Qfalse: Qtrue;
      }
    "
  else
    "RTEST(#{to_c tree[1]}) ? Qfalse : Qtrue"
  end
end

#to_c_or(tree, return_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/logical.rb', line 43

def to_c_or(tree, return_var = nil)
  if return_var
    "
      {
        VALUE op1 = Qnil;
        VALUE op2 = Qnil;
        #{to_c tree[1], "op1"};
        #{to_c tree[2], "op2"};
        #{return_var} = (RTEST(op1) || RTEST(op2)) ? Qtrue : Qfalse;
      }
    "
  else
  "(RTEST(#{to_c tree[1]}) || RTEST(#{to_c tree[2]})) ? Qtrue : Qfalse"
  end
end

#to_c_redo(tree, result_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/nonlocal.rb', line 101

def to_c_redo(tree, result_var = nil)
  if @on_block
     code = "
        goto fastruby_local_redo;
      "
      
      if result_var
        code
      else
        inline_block code
      end
  else
      _raise("rb_eLocalJumpError","illegal redo");
  end
end

#to_c_rescue(tree) ⇒ Object 



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# File 'lib/fastruby/translator/modules/exceptions.rb', line 25

def to_c_rescue(tree)
  catch_on_throw do
    if tree[1][0] == :resbody
      else_tree = tree[2]
  
      if else_tree
        to_c else_tree
      else
        "Qnil"
      end
    else
      resbody_tree = tree[2]
      else_tree = nil
      if tree[-1]
        if tree[-1][0] != :resbody
          else_tree = tree[-1]
        end
      end
  
      catch_condition_array = []
      lasgn_code = ""
      resbody_code = to_c(resbody_tree[2])
  
      rescue_code = ""
  
      tree[1..-1].each do |resbody_tree|
        next if resbody_tree[0] != :resbody
  
        if resbody_tree[1].size == 1
          resbody_tree[1][1] = s(:const, :Exception)
        end
  
        if resbody_tree[1].last[0] == :lasgn
          lasgn_code = to_c(resbody_tree[1].last)
        end
  
        resbody_tree[1][1..-1].each do |xtree|
          if xtree[0] != :lasgn
            trapcode = "rb_eException";
  
            if xtree
              trapcode = to_c(xtree)
            end
  
            catch_condition_array << "(rb_obj_is_kind_of(frame.thread_data->exception,#{trapcode}) == Qtrue)"
          end
        end
  
        rescue_code << "
          if (aux == FASTRUBY_TAG_RAISE) {
            if (#{catch_condition_array.join(" || ")})
            {
              // trap exception
              frame.targetted = 1;
  
              #{lasgn_code};
  
               #{resbody_code};
            }
          }
        "
      end
  
      frame_call(
        "ret = " + frame(to_c(tree[1])+";","
          #{rescue_code}
        ", else_tree ? to_c(else_tree) : nil, 1)
  
        )
    end
  end
end

#to_c_retry(tree, result_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/nonlocal.rb', line 79

def to_c_retry(tree, result_var = nil)
    code = "
      {
     typeof(pframe) target_frame_;
     target_frame_ = (void*)plocals->call_frame;

     if (target_frame_ == 0) {
        #{_raise("rb_eLocalJumpError","illegal retry")};
     }

     target_frame_->targetted = 1;
     longjmp(pframe->jmp,FASTRUBY_TAG_RETRY);
     }
     "
   if result_var
     code
   else
     inline_block code
   end
end

#to_c_return(tree, return_variable = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/nonlocal.rb', line 25

def to_c_return(tree, return_variable = nil)
  code = proc{"
    #{to_c(tree[1],"last_expression")};
    goto local_return;
    return Qnil;
    "}
    
  if return_variable
    code.call
  else
    inline_block &code
  end
end

#to_c_scope(tree, result_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/defn.rb', line 132

def to_c_scope(tree, result_var = nil)
  if tree[1]
    if result_var
      to_c(tree[1], result_var)
    else
      to_c(tree[1])
    end
  else
    "Qnil"
  end
end

#to_c_while(tree, result_var = nil) ⇒ Object 



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# File 'lib/fastruby/translator/modules/flow.rb', line 68

def to_c_while(tree, result_var = nil)
  
  begin_while = "begin_while_"+rand(10000000).to_s
  end_while = "end_while_"+rand(10000000).to_s
  aux_varname = "_aux_" + rand(10000000).to_s
  code = proc{ "
    {
      VALUE while_condition;
      VALUE #{aux_varname};
      
#{begin_while}:
      #{to_c tree[1], "while_condition"};
      if (!RTEST(while_condition)) goto #{end_while}; 
      #{to_c tree[2], aux_varname};
      goto #{begin_while};
#{end_while}:
      
      #{
      if result_var
        "#{result_var} = Qnil;"
      else
        "return Qnil;"
      end
      }
    }
  "}
  
  if result_var
    code.call
  else
    inline_block &code
  end
  
end

#to_c_yield(tree) ⇒ Object 



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# File 'lib/fastruby/translator/modules/block.rb', line 25

def to_c_yield(tree)

  block_code = proc { |name| "
    static VALUE #{name}(VALUE frame_param, VALUE* block_args, int size) {

      #{@locals_struct} *plocals;
      #{@frame_struct} *pframe;
      pframe = (void*)frame_param;
      plocals = (void*)pframe->plocals;

      if ((plocals->block_function_address) == 0) {
        #{_raise("rb_eLocalJumpError", "no block given")};
      } else {
        return ((VALUE(*)(int,VALUE*,VALUE,VALUE))(plocals->block_function_address))(size, block_args, (VALUE)(plocals->block_function_param), (VALUE)pframe);
      }
    }
  "
  }

  splat_arg = tree.find{|x| x == :yield ? false : x[0] == :splat}

  protected_block(false) do
    if splat_arg
      "
        VALUE splat_array = Qnil;
        VALUE block_aux = Qnil;
         #{to_c(splat_arg[1], "splat_array")};
        
        if (CLASS_OF(splat_array) == rb_cArray) {
          VALUE block_args[_RARRAY_LEN(splat_array) + #{tree.size}];
          int i;
          #{ 
            (0..tree.size-3).map{|i|
              "
              #{to_c(tree[i+1], "block_aux")};
              block_args[#{i}] = block_aux;
              "
            }.join(";\n")
          };
          
          for (i=0; i<_RARRAY_LEN(splat_array); i++) {
            block_args[i+#{tree.size-2}] = rb_ary_entry(splat_array,i);
          }
          
          last_expression = #{anonymous_function(&block_code)}((VALUE)pframe, block_args, _RARRAY_LEN(splat_array) + #{tree.size-2});
        } else {
          VALUE block_args[1+#{tree.size}];
          #{ 
            (0..tree.size-3).map{|i|
              "
              #{to_c(tree[i+1], "block_aux")};
              block_args[#{i}] = block_aux;
              "
            }.join(";\n")
          };
          
          block_args[#{tree.size-2}] = splat_array;
          last_expression = #{anonymous_function(&block_code)}((VALUE)pframe, block_args, #{tree.size-1});
        }
        
      "
    else
      if tree.size > 1
          "last_expression = " + anonymous_function(&block_code)+"((VALUE)pframe, (VALUE[]){#{tree[1..-1].map{|subtree| to_c subtree}.join(",")}},#{tree.size-1})"
        else
          "last_expression = " + anonymous_function(&block_code)+"((VALUE)pframe, (VALUE[]){}, #{tree.size-1})"
        end
    end
  end
end