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--  Meta description of nodes.
--  Copyright (C) 2014 Tristan Gingold
--
--  GHDL is free software; you can redistribute it and/or modify it under
--  the terms of the GNU General Public License as published by the Free
--  Software Foundation; either version 2, or (at your option) any later
--  version.
--
--  GHDL is distributed in the hope that it will be useful, but WITHOUT ANY
--  WARRANTY; without even the implied warranty of MERCHANTABILITY or
--  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
--  for more details.
--
--  You should have received a copy of the GNU General Public License
--  along with GHDL; see the file COPYING.  If not, write to the Free
--  Software Foundation, 59 Temple Place - Suite 330, Boston, MA
--  02111-1307, USA.

package body Edif.Nodes_Meta is
   Fields_Type : constant array (Fields_Enum) of Types_Enum :=
     (
      Field_CAR => Type_Node,
      Field_CDR => Type_Node,
      Field_Symbol => Type_Name_Id,
      Field_Keyword => Type_Name_Id,
      Field_Number => Type_Int32,
      Field_String_Id => Type_String8_Id,
      Field_String_Len => Type_Uns32,
      Field_Name => Type_Node,
      Field_Edif_Level => Type_Int32,
      Field_Edif_Version => Type_Int32,
      Field_Keyword_Map => Type_Node,
      Field_Status => Type_Node,
      Field_Chain => Type_Node,
      Field_External_Chain => Type_Node,
      Field_Library_Chain => Type_Node,
      Field_Cells_Chain => Type_Node,
      Field_Ports_Chain => Type_Node,
      Field_Contents_Chain => Type_Node,
      Field_Properties_Chain => Type_Node,
      Field_Port_Instances_Chain => Type_Node,
      Field_Joined_Chain => Type_Node,
      Field_Design => Type_Node,
      Field_Designator => Type_Node,
      Field_Technology => Type_Node,
      Field_Cell_Type => Type_Name_Id,
      Field_View_Type => Type_Name_Id,
      Field_Interface => Type_Node,
      Field_View_Ref => Type_Name_Id,
      Field_Cell_Ref => Type_Node,
      Field_Library_Ref => Type_Node,
      Field_View => Type_Node,
      Field_Direction => Type_Direction_Type,
      Field_Boolean => Type_Boolean,
      Field_Value => Type_Node,
      Field_Owner => Type_Node,
      Field_Instance_Ref => Type_Node,
      Field_Port => Type_Node,
      Field_Index => Type_Int32,
      Field_Array_Length => Type_Int32,
      Field_Unit => Type_Name_Id,
      Field_String => Type_Node
     );

   function Get_Field_Type (F : Fields_Enum) return Types_Enum is
   begin
      return Fields_Type (F);
   end Get_Field_Type;

   function Get_Field_Image (F : Fields_Enum) return String is
   begin
      case F is
         when Field_CAR =>
            return "car";
         when Field_CDR =>
            return "cdr";
         when Field_Symbol =>
            return "symbol";
         when Field_Keyword =>
            return "keyword";
         when Field_Number =>
            return "number";
         when Field_String_Id =>
            return "string_id";
         when Field_String_Len =>
            return "string_len";
         when Field_Name =>
            return "name";
         when Field_Edif_Level =>
            return "edif_level";
         when Field_Edif_Version =>
            return "edif_version";
         when Field_Keyword_Map =>
            return "keyword_map";
         when Field_Status =>
            return "status";
         when Field_Chain =>
            return "chain";
         when Field_External_Chain =>
            return "external_chain";
         when Field_Library_Chain =>
            return "library_chain";
         when Field_Cells_Chain =>
            return "cells_chain";
         when Field_Ports_Chain =>
            return "ports_chain";
         when Field_Contents_Chain =>
            return "contents_chain";
         when Field_Properties_Chain =>
            return "properties_chain";
         when Field_Port_Instances_Chain =>
            return "port_instances_chain";
         when Field_Joined_Chain =>
            return "joined_chain";
         when Field_Design =>
            return "design";
         when Field_Designator =>
            return "designator";
         when Field_Technology =>
            return "technology";
         when Field_Cell_Type =>
            return "cell_type";
         when Field_View_Type =>
            return "view_type";
         when Field_Interface =>
            return "interface";
         when Field_View_Ref =>
            return "view_ref";
         when Field_Cell_Ref =>
            return "cell_ref";
         when Field_Library_Ref =>
            return "library_ref";
         when Field_View =>
            return "view";
         when Field_Direction =>
            return "direction";
         when Field_Boolean =>
            return "boolean";
         when Field_Value =>
            return "value";
         when Field_Owner =>
            return "owner";
         when Field_Instance_Ref =>
            return "instance_ref";
         when Field_Port =>
            return "port";
         when Field_Index =>
            return "index";
         when Field_Array_Length =>
            return "array_length";
         when Field_Unit =>
            return "unit";
         when Field_String =>
            return "string";
      end case;
   end Get_Field_Image;

   function Get_Nkind_Image (K : Nkind) return String is
   begin
      case K is
         when N_Error =>
            return "error";
         when N_Keyword =>
            return "keyword";
         when N_Symbol =>
            return "symbol";
         when N_Number =>
            return "number";
         when N_String =>
            return "string";
         when N_Chain =>
            return "chain";
         when N_Edif =>
            return "edif";
         when N_External =>
            return "external";
         when N_Cell =>
            return "cell";
         when N_View =>
            return "view";
         when N_Port =>
            return "port";
         when N_Library =>
            return "library";
         when N_Interface =>
            return "interface";
         when N_Instance =>
            return "instance";
         when N_Net =>
            return "net";
         when N_Design =>
            return "design";
         when N_Port_Ref =>
            return "port_ref";
         when N_Cell_Ref =>
            return "cell_ref";
         when N_View_Ref =>
            return "view_ref";
         when N_Member =>
            return "member";
         when N_Property =>
            return "property";
         when N_Userdata =>
            return "userdata";
         when N_Port_Instance =>
            return "port_instance";
         when N_Array =>
            return "array";
         when N_Rename =>
            return "rename";
         when N_Boolean =>
            return "boolean";
      end case;
   end Get_Nkind_Image;

   function Get_Field_Attribute (F : Fields_Enum) return Field_Attribute is
   begin
      case F is
         when Field_CAR =>
            return Attr_None;
         when Field_CDR =>
            return Attr_None;
         when Field_Symbol =>
            return Attr_None;
         when Field_Keyword =>
            return Attr_None;
         when Field_Number =>
            return Attr_None;
         when Field_String_Id =>
            return Attr_None;
         when Field_String_Len =>
            return Attr_None;
         when Field_Name =>
            return Attr_None;
         when Field_Edif_Level =>
            return Attr_None;
         when Field_Edif_Version =>
            return Attr_None;
         when Field_Keyword_Map =>
            return Attr_None;
         when Field_Status =>
            return Attr_None;
         when Field_Chain =>
            return Attr_Chain_Next;
         when Field_External_Chain =>
            return Attr_Chain;
         when Field_Library_Chain =>
            return Attr_Chain;
         when Field_Cells_Chain =>
            return Attr_Chain;
         when Field_Ports_Chain =>
            return Attr_Chain;
         when Field_Contents_Chain =>
            return Attr_Chain;
         when Field_Properties_Chain =>
            return Attr_Chain;
         when Field_Port_Instances_Chain =>
            return Attr_Chain;
         when Field_Joined_Chain =>
            return Attr_Chain;
         when Field_Design =>
            return Attr_None;
         when Field_Designator =>
            return Attr_None;
         when Field_Technology =>
            return Attr_None;
         when Field_Cell_Type =>
            return Attr_None;
         when Field_View_Type =>
            return Attr_None;
         when Field_Interface =>
            return Attr_None;
         when Field_View_Ref =>
            return Attr_None;
         when Field_Cell_Ref =>
            return Attr_None;
         when Field_Library_Ref =>
            return Attr_None;
         when Field_View =>
            return Attr_None;
         when Field_Direction =>
            return Attr_None;
         when Field_Boolean =>
            return Attr_None;
         when Field_Value =>
            return Attr_None;
         when Field_Owner =>
            return Attr_None;
         when Field_Instance_Ref =>
            return Attr_None;
         when Field_Port =>
            return Attr_None;
         when Field_Index =>
            return Attr_None;
         when Field_Array_Length =>
            return Attr_None;
         when Field_Unit =>
            return Attr_None;
         when Field_String =>
            return Attr_None;
      end case;
   end Get_Field_Attribute;

   Fields_Of_Iir : constant Fields_Array :=
     (
      --  N_Error
      --  N_Keyword
      Field_Keyword,
      Field_CDR,
      --  N_Symbol
      Field_Symbol,
      --  N_Number
      Field_Number,
      --  N_String
      Field_String_Id,
      Field_String_Len,
      --  N_Chain
      Field_CAR,
      Field_CDR,
      --  N_Edif
      Field_Name,
      Field_Edif_Version,
      Field_Edif_Level,
      Field_Keyword_Map,
      Field_Status,
      Field_External_Chain,
      Field_Library_Chain,
      Field_Design,
      --  N_External
      Field_Name,
      Field_Edif_Level,
      Field_Technology,
      Field_Cells_Chain,
      Field_Chain,
      --  N_Cell
      Field_Name,
      Field_Cell_Type,
      Field_Properties_Chain,
      Field_View,
      Field_Chain,
      --  N_View
      Field_Name,
      Field_View_Type,
      Field_Interface,
      Field_Properties_Chain,
      Field_Contents_Chain,
      Field_Chain,
      --  N_Port
      Field_Name,
      Field_Direction,
      Field_Properties_Chain,
      Field_Designator,
      Field_Chain,
      --  N_Library
      Field_Name,
      Field_Edif_Level,
      Field_Technology,
      Field_Cells_Chain,
      Field_Chain,
      --  N_Interface
      Field_Ports_Chain,
      Field_Properties_Chain,
      Field_Designator,
      --  N_Instance
      Field_Name,
      Field_Instance_Ref,
      Field_Port_Instances_Chain,
      Field_Properties_Chain,
      Field_Chain,
      --  N_Net
      Field_Name,
      Field_Joined_Chain,
      Field_Properties_Chain,
      Field_Chain,
      --  N_Design
      Field_Name,
      Field_Cell_Ref,
      Field_Properties_Chain,
      --  N_Port_Ref
      Field_Port,
      Field_Instance_Ref,
      Field_Chain,
      --  N_Cell_Ref
      Field_Name,
      Field_Library_Ref,
      --  N_View_Ref
      Field_Name,
      Field_Cell_Ref,
      --  N_Member
      Field_Name,
      Field_Index,
      --  N_Property
      Field_Name,
      Field_Value,
      Field_Owner,
      Field_Unit,
      Field_Chain,
      --  N_Userdata
      Field_Name,
      Field_CDR,
      Field_Chain,
      --  N_Port_Instance
      Field_Name,
      Field_Properties_Chain,
      Field_Chain,
      --  N_Array
      Field_Name,
      Field_Array_Length,
      --  N_Rename
      Field_Name,
      Field_String,
      --  N_Boolean
      Field_Boolean
     );

   Fields_Of_Iir_Last : constant array (Nkind) of Integer :=
     (
      N_Error => -1,
      N_Keyword => 1,
      N_Symbol => 2,
      N_Number => 3,
      N_String => 5,
      N_Chain => 7,
      N_Edif => 15,
      N_External => 20,
      N_Cell => 25,
      N_View => 31,
      N_Port => 36,
      N_Library => 41,
      N_Interface => 44,
      N_Instance => 49,
      N_Net => 53,
      N_Design => 56,
      N_Port_Ref => 59,
      N_Cell_Ref => 61,
      N_View_Ref => 63,
      N_Member => 65,
      N_Property => 70,
      N_Userdata => 73,
      N_Port_Instance => 76,
      N_Array => 78,
      N_Rename => 80,
      N_Boolean => 81
     );

   function Get_Fields (K : Nkind) return Fields_Array
   is
      First : Natural;
      Last : Integer;
   begin
      if K = Nkind'First then
         First := Fields_Of_Iir'First;
      else
         First := Fields_Of_Iir_Last (Nkind'Pred (K)) + 1;
      end if;
      Last := Fields_Of_Iir_Last (K);
      return Fields_Of_Iir (First .. Last);
   end Get_Fields;

   function Get_Boolean
      (N : Node; F : Fields_Enum) return Boolean is
   begin
      pragma Assert (Fields_Type (F) = Type_Boolean);
      case F is
         when Field_Boolean =>
            return Get_Boolean (N);
         when others =>
            raise Internal_Error;
      end case;
   end Get_Boolean;

   procedure Set_Boolean
      (N : Node; F : Fields_Enum; V: Boolean) is
   begin
      pragma Assert (Fields_Type (F) = Type_Boolean);
      case F is
         when Field_Boolean =>
            Set_Boolean (N, V);
         when others =>
            raise Internal_Error;
      end case;
   end Set_Boolean;

   function Get_Direction_Type
      (N : Node; F : Fields_Enum) return Direction_Type is
   begin
      pragma Assert (Fields_Type (F) = Type_Direction_Type);
      case F is
         when Field_Direction =>
            return Get_Direction (N);
         when others =>
            raise Internal_Error;
      end case;
   end Get_Direction_Type;

   procedure Set_Direction_Type
      (N : Node; F : Fields_Enum; V: Direction_Type) is
   begin
      pragma Assert (Fields_Type (F) = Type_Direction_Type);
      case F is
         when Field_Direction =>
            Set_Direction (N, V);
         when others =>
            raise Internal_Error;
      end case;
   end Set_Direction_Type;

   function Get_Int32
      (N : Node; F : Fields_Enum) return Int32 is
   begin
      pragma Assert (Fields_Type (F) = Type_Int32);
      case F is
         when Field_Number =>
            return Get_Number (N);
         when Field_Edif_Level =>
            return Get_Edif_Level (N);
         when Field_Edif_Version =>
            return Get_Edif_Version (N);
         when Field_Index =>
            return Get_Index (N);
         when Field_Array_Length =>
            return Get_Array_Length (N);
         when others =>
            raise Internal_Error;
      end case;
   end Get_Int32;

   procedure Set_Int32
      (N : Node; F : Fields_Enum; V: Int32) is
   begin
      pragma Assert (Fields_Type (F) = Type_Int32);
      case F is
         when Field_Number =>
            Set_Number (N, V);
         when Field_Edif_Level =>
            Set_Edif_Level (N, V);
         when Field_Edif_Version =>
            Set_Edif_Version (N, V);
         when Field_Index =>
            Set_Index (N, V);
         when Field_Array_Length =>
            Set_Array_Length (N, V);
         when others =>
            raise Internal_Error;
      end case;
   end Set_Int32;

   function Get_Name_Id
      (N : Node; F : Fields_Enum) return Name_Id is
   begin
      pragma Assert (Fields_Type (F) = Type_Name_Id);
      case F is
         when Field_Symbol =>
            return Get_Symbol (N);
         when Field_Keyword =>
            return Get_Keyword (N);
         when Field_Cell_Type =>
            return Get_Cell_Type (N);
         when Field_View_Type =>
            return Get_View_Type (N);
         when Field_View_Ref =>
            return Get_View_Ref (N);
         when Field_Unit =>
            return Get_Unit (N);
         when others =>
            raise Internal_Error;
      end case;
   end Get_Name_Id;

   procedure Set_Name_Id
      (N : Node; F : Fields_Enum; V: Name_Id) is
   begin
      pragma Assert (Fields_Type (F) = Type_Name_Id);
      case F is
         when Field_Symbol =>
            Set_Symbol (N, V);
         when Field_Keyword =>
            Set_Keyword (N, V);
         when Field_Cell_Type =>
            Set_Cell_Type (N, V);
         when Field_View_Type =>
            Set_View_Type (N, V);
         when Field_View_Ref =>
            Set_View_Ref (N, V);
         when Field_Unit =>


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