* (ocarina-backends-lnt*): New Backend: LNT that allows code generation

	 from AADL models to LNT in order to perform formal verification on
	AADL models.

	(by Hana Mkaouar)

projects/Makefile.am

@@ -63,6 +63,7 @@ TREE_PIDL_SPECS = src/core/tree/ocarina-me_aadl-aadl_tree-nodes.idl	\
 	src/backends/ocarina-backends-asn1_tree-nodes.idl		\
 	src/backends/ocarina-backends-xml_tree-nodes.idl		\
 	src/backends/ocarina-backends-pn-nodes.idl			\
+	src/backends/ocarina-backends-lnt-nodes.idl			\
 	src/backends/ocarina-backends-mast_tree-nodes.idl
 
 TREE_ADA_SPECS = ${addprefix $(top_builddir)/, $(TREE_PIDL_SPECS:.idl=.ads)}

src/backends/ocarina-backends-lnt-components.ads

+------------------------------------------------------------------------------
+--                                                                          --
+--                           OCARINA COMPONENTS                             --
+--                                                                          --
+--      O C A R I N A . B A C K E N D S . L N T . C O M P O N E N T S       --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--                     Copyright (C) 2016 ESA & ISAE.                       --
+--                                                                          --
+-- Ocarina  is free software; you can redistribute it and/or modify under   --
+-- terms of the  GNU General Public License as published  by the Free Soft- --
+-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
+-- sion. Ocarina 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.                     --
+--                                                                          --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception,   --
+-- version 3.1, as published by the Free Software Foundation.               --
+--                                                                          --
+-- You should have received a copy of the GNU General Public License and    --
+-- a copy of the GCC Runtime Library Exception along with this program;     --
+-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
+-- <http://www.gnu.org/licenses/>.                                          --
+--                                                                          --
+--                 Ocarina is maintained by the TASTE project               --
+--                      (taste-users@lists.tuxfamily.org)                   --
+--                                                                          --
+------------------------------------------------------------------------------
+
+with Ocarina.Backends.Lnt.Nodes;
+use Ocarina.Backends.Lnt.Nodes;
+
+package Ocarina.Backends.Lnt.Components is
+
+   function Make_Module_Definition
+    (Defining_Identifier : Node_Id;
+     Modules : List_Id := No_List;
+     Predefined_Functions : List_Id := No_List;
+     Module_Pragma : List_Id := No_List;
+     Definitions : List_Id := No_List)
+     return Node_Id;
+
+   function Make_Type_Def
+    (Defining_Identifier : Node_Id;
+     Type_Exp : Node_Id;
+     Type_Pragma : List_Id := No_List;
+     Predefined_Functions : List_Id := No_List)
+     return Node_Id;
+
+   function Make_Type_Exp
+    (Defining_Identifier : Node_Id := No_Node;
+     Type_constructors : List_Id := No_List;
+     Is_Set : boolean := false;
+     Is_Sorted_Set : boolean := false;
+     Is_List : boolean := false;
+     Is_Sorted_List : boolean := false;
+     Is_Array : boolean := false;
+     Is_Range : boolean := false;
+     RangeLNT : Node_Id := No_Node)
+     return Node_Id;
+
+   function Make_RangeLNT
+     (Low_Bound  : Node_Id;
+      High_Bound : Node_Id) return Node_Id;
+
+   function Make_Type_Constructor
+     (Defining_Identifier : Node_Id;
+      Constructor_Parameters : List_Id := No_List;
+      Constructor_Pragma : List_Id := No_List)
+      return Node_Id;
+
+   function Make_Parameter_Specification
+     (Parameter_Var : Node_Id;
+      Parameter_Type : Node_Id;
+      Parameter_Mode : Mode_Id := Mode_In)
+      return Node_Id;
+
+   function Make_Function_Definition
+    (Defining_Identifier : Node_Id;
+     Function_Parameters : List_Id := No_List;
+     Function_Return_Type : Node_Id := No_Node;
+     Function_Exceptions : List_Id := No_List;
+     Function_Pragma : List_Id := No_List;
+     Statements : List_Id)
+     return Node_Id;
+
+   function Make_Actual_Parameter
+     (Expression : Node_Id;
+      Is_Out : boolean := false;
+      Is_InOut : boolean := false)
+      return Node_Id;
+
+   function Make_Null_Statement return Node_Id;
+   function Make_Return_Statement
+    (Expression : Node_Id := No_Node;
+     Is_Function : boolean := false)
+    return Node_Id;
+
+   function Make_Predefined_Function
+    (Predefined_Function : Node_Kind;
+     Is_With_Clause : boolean := false)
+     return Node_Id;
+
+   function Make_Assignment_Statement
+     (Variable_Identifier : Node_Id;
+      Expression          : Node_Id)
+     return Node_Id;
+
+   function Make_Array_Element_Assignment_Statement
+     (Defining_Identifier : Node_Id;
+      Expression_Index    : Node_Id;
+      Expression          : Node_Id)
+     return Node_Id;
+
+   function Make_Case_Statement
+     (Expression                  : Node_Id;
+      Variable_Declarations : List_Id := No_List;
+      Case_Statement_Alternatives : List_Id)
+     return Node_Id;
+
+   function Make_Case_Statement_Alternative
+     (Pattern_List : List_Id := No_List;
+      Statements          : List_Id)
+     return Node_Id;
+
+   function Make_If_Statement
+     (Condition        : Node_Id;
+      Then_Statements  : List_Id;
+      Elsif_Statements : List_Id := No_List;
+      Else_Statements  : List_Id := No_List)
+     return Node_Id;
+
+   function Make_Elsif_Statement
+     (Condition       : Node_Id;
+      Then_Statements : List_Id)
+     return Node_Id;
+
+   function Make_Loop_Statement
+      (Statements : List_Id)
+     return Node_Id;
+
+   function Make_While_Statement
+     (Expression : Node_Id;
+      Statements : List_Id)
+     return Node_Id;
+
+   function Make_Var_Declaration
+     (Defining_Identifier : Node_Id;
+      Var_Type : Node_Id)
+    return Node_Id;
+
+   function Make_Var_Statement
+      (Variable_Declarations : List_Id;
+       Statements : List_Id)
+     return Node_Id;
+
+   function Make_Nat (Value : Integer) return Node_Id;
+
+   function Make_Expressions (Expression_List : List_Id)
+     return Node_Id;
+
+   function Make_Parenthesized_Expression (Expression : Node_Id)
+     return Node_Id;
+
+   function Make_Function_Call_Expression
+     (Defining_Identifier : Node_Id;
+      Parameters : List_Id := No_List)
+     return Node_Id;
+
+   function Make_Infix_Function_Call_Expression
+     (Operator : Node_Id;
+      Left_Part : Node_Id := No_Node;
+      Right_Part : Node_Id)
+     return Node_Id;
+
+   function Make_Field_Selection_Expression
+    (Expression : Node_Id;
+     Field : Node_Id)
+     return Node_Id;
+
+   function Make_Field_Update_Expression
+     (Expression : Node_Id;
+      Field_Association : List_Id)
+     return Node_Id;
+
+   function Make_Element_Association
+    (Index : Node_Id;
+     Expression : Node_Id)
+     return Node_Id;
+
+   function Make_Array_Elt_Access_Expression
+     (Index : Node_Id;
+      Expression : Node_Id)
+     return Node_Id;
+
+   function Make_Pattern
+    (Sub_Pattern : Node_Id := No_Node;
+     Pattern_Type : Node_Id := No_Node;
+     Is_Any : boolean := false;
+     Is_Of : boolean := false)
+     return Node_Id;
+
+   function Make_Patterns (Pattern_List : List_Id)
+     return Node_Id;
+
+   function Make_Parenthesized_Pattern (Pattern : Node_Id)
+     return Node_Id;
+
+   function Make_Constructed_Pattern
+     (Defining_Identifier : Node_Id;
+      Parameters : List_Id := No_List)
+     return Node_Id;
+
+   function Make_Channel
+     (Defining_Identifier : Node_Id;
+      Gate_Profiles : List_Id)
+     return Node_Id;
+
+   function Make_Gate_Profile
+     (Gate_Types : List_Id)
+     return Node_Id;
+
+   function Make_Process_Definition
+    (Corresponding_Component : Node_Id := No_Node;
+     Defining_Identifier : Node_Id;
+     Process_Parameters : List_Id := No_List;
+     Process_Gate_Declarations : List_Id := No_List;
+     Process_Exceptions : List_Id := No_List;
+     Process_Pragma : List_Id := No_List;
+     Statements : List_Id)
+     return Node_Id;
+
+   function Make_Gate_Declaration
+    (Channel_Name : Node_Id := No_Node;
+     Gate : Node_Id;
+     Is_Any : boolean := false)
+     return Node_Id;
+
+   function Make_Stop_Statement return Node_Id;
+
+   function Make_Process_Instantiation_Statement
+     (Defining_Identifier : Node_Id;
+      Actual_Gates : List_Id := No_List;
+      Actual_Parameters : List_Id := No_List;
+      Is_Sporadic : boolean := false)
+     return Node_Id;
+
+   function Make_Communication_Statement
+     (Defining_Identifier : Node_Id;
+      Offers : List_Id := No_List;
+      Has_Where : boolean := false;
+      Expression : Node_Id := No_Node)
+     return Node_Id;
+
+   function Make_Offer_Statement
+    (Expression : Node_Id := No_Node;
+     Pattern : Node_Id;
+     Is_Input : boolean := false)
+     return Node_Id;
+
+   function Make_Select_Statement
+     (Select_Statement_Alternatives : List_Id)
+     return Node_Id;
+
+   function Make_Select_Statement_Alternative
+      (Statements : List_Id)
+     return Node_Id;
+
+   function Make_Parallel_Composition_Statement
+     (Global_Synchronisation_Gates : List_Id := No_List;
+      Interface_Synchronisations : List_Id)
+     return Node_Id;
+
+   function Make_Interface_Synchronisation
+      (Interface_Synchronisation_Gates : List_Id := No_List;
+       Statements : List_Id)
+     return Node_Id;
+
+   function Make_Module_Pragma
+    (P_Type : Node_Kind;
+     N_Constant : Integer)
+    return Node_Id;
+
+   function Make_Hide_Statement
+      (Hide_Gate_Declarations : List_Id;
+       Statements : List_Id)
+     return Node_Id;
+
+   function Make_Var_Loop_Select (Var_Dec : List_Id;
+                                 Out_Loop : List_Id;
+                                In_Select : List_Id)
+     return Node_Id;
+end Ocarina.Backends.Lnt.Components;

src/backends/ocarina-backends-lnt-debug.adb

+------------------------------------------------------------------------------
+--                                                                          --
+--                           OCARINA COMPONENTS                             --
+--                                                                          --
+--           O C A R I N A . B A C K E N D S . L N T . D E B U G            --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--                     Copyright (C) 2016 ESA & ISAE.                       --
+--                                                                          --
+-- Ocarina  is free software; you can redistribute it and/or modify under   --
+-- terms of the  GNU General Public License as published  by the Free Soft- --
+-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
+-- sion. Ocarina 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.                     --
+--                                                                          --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception,   --
+-- version 3.1, as published by the Free Software Foundation.               --
+--                                                                          --
+-- You should have received a copy of the GNU General Public License and    --
+-- a copy of the GCC Runtime Library Exception along with this program;     --
+-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
+-- <http://www.gnu.org/licenses/>.                                          --
+--                                                                          --
+--                 Ocarina is maintained by the TASTE project               --
+--                      (taste-users@lists.tuxfamily.org)                   --
+--                                                                          --
+------------------------------------------------------------------------------
+
+with Charset;       use Charset;
+with Locations;     use Locations;
+with Ocarina.Namet; use Ocarina.Namet;
+with Utils;         use Utils;
+
+package body Ocarina.Backends.LNT.Debug is
+
+   -----------
+   -- Image --
+   -----------
+
+   function Image (N : Node_Kind) return String is
+      S : String := Node_Kind'Image (N);
+   begin
+      To_Lower (S);
+      for I in S'Range loop
+         if S (I) = '_' then
+            S (I) := ' ';
+         end if;
+      end loop;
+      return S (3 .. S'Last);
+   end Image;
+
+   function Image (N : Name_Id) return String is
+   begin
+      if N = No_Name then
+         return No_Str;
+      else
+         return Get_Name_String (N);
+      end if;
+   end Image;
+
+   function Image (N : Node_Id) return String is
+   begin
+      return Image (Byte (N));
+   end Image;
+
+   function Image (N : Mode_Id) return String is
+   begin
+      case N is
+         when Mode_In =>
+            return Quoted ("in");
+         when Mode_Inout =>
+            return Quoted ("inout");
+         when Mode_Out =>
+            return Quoted ("out");
+      end case;
+   end Image;
+
+   function Image (N : List_Id) return String is
+   begin
+      return Image (Int (N));
+   end Image;
+
+   function Image (N : Value_Id) return String is
+   begin
+      return Image (Int (N));
+   end Image;
+   function Image (N : Operator_Id) return String is
+   begin
+      return Operator_Id'Image (N);
+   end Image;
+   function Image (N : Boolean) return String is
+   begin
+      return Boolean'Image (N);
+   end Image;
+
+   function Image (N : Byte) return String is
+   begin
+      return Image (Int (N));
+   end Image;
+
+   function Image (N : Int) return String is
+      S : constant String := Int'Image (N);
+   begin
+      return S (S'First + 1 .. S'Last);
+   end Image;
+
+   ---------------
+   -- W_Boolean --
+   ---------------
+
+   procedure W_Boolean (N : Boolean) is
+   begin
+      Write_Str (N'Img);
+   end W_Boolean;
+
+   ------------
+   -- W_Byte --
+   ------------
+
+   procedure W_Byte (N : Byte) is
+   begin
+      Write_Int (Int (N));
+   end W_Byte;
+
+   -----------------
+   -- W_Full_Tree --
+   -----------------
+
+   procedure W_Full_Tree (N : Node_Id) is
+      D : Node_Id := First_Node (List_Id (N));
+   begin
+      N_Indents := 0;
+      while Present (D) loop
+         W_Node_Id (D);
+         D := Next_Node (D);
+      end loop;
+   end W_Full_Tree;
+
+   ---------------
+   -- W_Indents --
+   ---------------
+
+   procedure W_Indents is
+   begin
+      for I in 1 .. N_Indents loop
+         Write_Str (" ");
+      end loop;
+   end W_Indents;
+
+   ---------------
+   -- W_List_Id --
+   ---------------
+
+   procedure W_List_Id (L : List_Id) is
+      E : Node_Id;
+   begin
+      if L = No_List then
+         return;
+      end if;
+
+      E := First_Node (L);
+      while E /= No_Node loop
+         W_Node_Id (E);
+         E := Next_Node (E);
+      end loop;
+   end W_List_Id;
+
+   ----------------------
+   -- W_Node_Attribute --
+   ----------------------
+
+   procedure W_Node_Attribute
+     (A : String;
+      K : String;
+      V : String;
+      N : Int := 0)
+   is
+   begin
+      --  Node attributes that must be ignored
+
+      if A = "Next_Node" then
+         return;
+      end if;
+
+      N_Indents := N_Indents + 1;
+      W_Indents;
+      Write_Str  (A);
+      Write_Char (' ');
+      Write_Str  (K);
+      Write_Char (' ');
+
+      if K = "Name_Id" then
+         Write_Line (Quoted (V));
+      else
+         Write_Line (V);
+      end if;
+
+      --  Node attributes that must be developed
+
+      if A /= "Node" then
+         if K = "Node_Id" then
+            W_Node_Id (Node_Id (N));
+         elsif K = "List_Id" then
+            W_List_Id (List_Id (N));
+         end if;
+      end if;
+
+      N_Indents := N_Indents - 1;
+   end W_Node_Attribute;
+
+   -------------------
+   -- W_Node_Header --
+   -------------------
+
+   procedure W_Node_Header (N : Node_Id) is
+   begin
+      W_Indents;
+      Write_Int  (Int (N));
+      Write_Char (' ');
+      Write_Str  (Image (Kind (N)));
+      Write_Char (' ');
+      Write_Line (Image (Loc (N)));
+   end W_Node_Header;
+
+   ---------------
+   -- W_Node_Id --
+   ---------------
+
+   procedure W_Node_Id (N : Node_Id) is
+   begin
+      if N = No_Node then
+         return;
+      end if;
+      W_Node (N);
+   end W_Node_Id;
+
+end Ocarina.Backends.LNT.Debug;

src/backends/ocarina-backends-lnt-debug.ads

+------------------------------------------------------------------------------
+--                                                                          --
+--                           OCARINA COMPONENTS                             --
+--                                                                          --
+--           O C A R I N A . B A C K E N D S . L N T . D E B U G            --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--                     Copyright (C) 2016 ESA & ISAE.                       --
+--                                                                          --
+-- Ocarina  is free software; you can redistribute it and/or modify under   --
+-- terms of the  GNU General Public License as published  by the Free Soft- --
+-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
+-- sion. Ocarina 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.                     --
+--                                                                          --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception,   --
+-- version 3.1, as published by the Free Software Foundation.               --
+--                                                                          --
+-- You should have received a copy of the GNU General Public License and    --
+-- a copy of the GCC Runtime Library Exception along with this program;     --
+-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
+-- <http://www.gnu.org/licenses/>.                                          --
+--                                                                          --
+--                 Ocarina is maintained by the TASTE project               --
+--                      (taste-users@lists.tuxfamily.org)                   --
+--                                                                          --
+------------------------------------------------------------------------------
+
+with Ocarina.Output; use Ocarina.Output;
+
+with Ocarina.Backends.LNT.Nodes; use Ocarina.Backends.LNT.Nodes;
+
+package Ocarina.Backends.LNT.Debug is
+
+   N_Indents : Integer := -1;
+
+   procedure W_Eol         (N : Natural := 1) renames Output.Write_Eol;
+   procedure W_Int         (N : Int)          renames Output.Write_Int;
+   procedure W_Line        (N : String)       renames Output.Write_Line;
+   procedure W_Str         (N : String)       renames Output.Write_Str;
+   procedure W_Indents;
+
+   procedure W_Boolean     (N : Boolean);
+   procedure W_Byte        (N : Byte);
+   procedure W_List_Id     (L : List_Id);
+   procedure W_Node_Id     (N : Node_Id);
+   procedure W_Node_Header (N : Node_Id);
+   procedure W_Full_Tree (N : Node_Id);
+
+   procedure W_Node_Attribute
+     (A : String;
+      K : String;
+      V : String;
+      N : Int := 0);
+