Create new repo for taste model checker

README.md

+This repository contains all the components of the [future] TASTE Model Checker.
+

asn1-iterators/Makefile

+ITERATORS_PREFIX?=/usr/local
+
+all:
+	@echo You can install with "sudo make install"
+	@echo A testcase can be build from source with "make test"
+
+install:
+	install -d $(ITERATORS_PREFIX)/share/taste
+	install -m 644 stg/ada_iterators-iterators-adb.stg $(ITERATORS_PREFIX)/share/taste
+	install -m 644 stg/ada_iterators-iterators-ads.stg $(ITERATORS_PREFIX)/share/taste
+	install -m 644 stg/ada_iterators.stg $(ITERATORS_PREFIX)/share/taste
+	install -m 755 src/taste-asn1-iterators $(ITERATORS_PREFIX)/bin
+	install -d /usr/share/ada/adainclude/asn1_iterators
+	install -m 644 src/asn1_iterators.gpr /usr/share/ada/adainclude
+	install -d /usr/lib/i386-linux-gnu/ada/adalib/asn1_iterators
+	install -m 644 src/*.ad? /usr/share/ada/adainclude/asn1_iterators
+	cd src && mkdir -p tmp && cd tmp && gnat make -c -O2 ../*.ad? && \
+	    install -m 644 *.ali /usr/lib/i386-linux-gnu/ada/adalib/asn1_iterators && \
+	    ar r libasn1_iterators.so *.o && cp libasn1_iterators.so /usr/lib/i386-linux-gnu && \
+	    cd ../.. && rm -rf src/tmp
+
+
+test_install: clean
+	mkdir -p build_test
+	cp test/DataView.asn build_test
+	cp test/test_generic.gpr build_test
+	cp test/test_generic.adb build_test
+	cd build_test && taste-asn1-iterators DataView.asn && gprbuild test_generic.gpr
+
+test: test_install
+	build_test/test_generic
+
+clean:
+	@rm -rf build_test
+
+.PHONY: all clean install test_install

asn1-iterators/README.md

+asn1-iterators
+==============
+
+(c) 2016-2017 European Space Agency
+Author/Contact: Maxime.Perrotin@esa.int
+
+Generic iterator functions in Ada for generating all combinations of values of ASN.1 data types
+
+v0.1 support for INTEGER with a range and SEQUENCE OF INTEGER (fixed and variable size arrays)
+
+test:
+
+    cd src
+    make
+
+Work in progress... Part of the TASTE project.
+

asn1-iterators/src/asn1_iterators-exhaustive_simulation.adb

+-- (c) 2017 European Space Agency / TASTE Project
+package body ASN1_Iterators.Exhaustive_Simulation is
+
+    function State_Hash(Context: Context_Ty) return Hash_Type is
+        (Ada.Strings.Hash(gnat.md5.digest(as_sea_ptr(Context'Address).all)));
+
+    -- Add a state to the graph: compute the hash (key) and store if not already there
+    function Add_to_graph(event : Event_ty) return Hash_Type is
+        New_State: State_Access;
+        New_Hash : Hash_Type;
+        New_Edge : constant Edge_ty := (event => event, state => backup_hash);
+    begin
+        New_Hash := State_Hash(Process_Ctxt.all);
+        if not Grafset.Contains(Key => New_Hash) then
+            New_State := new Global_State;
+            New_State.context := Process_Ctxt.all;
+            Grafset.Insert(Key => New_Hash, New_Item => New_State);
+        else
+            New_State := Grafset.Element(Key => New_Hash);
+        end if;
+        New_State.edges.append(New_Edge);
+        return New_Hash;
+    end;
+
+    -- Report the result of the property check to the user
+    procedure Check_And_Report (S_Hash: Hash_Type) is
+        errno: Natural := 0;
+        stop_condition: boolean := false;
+    begin
+        count := count + 1;
+        if check_properties(errno) then
+            put_line("Property " & errno'img & " is verified, at step " & count'img);
+            stop_condition := true;
+            if properties.Length <= 10 then
+                properties.include(s_hash);
+            end if;
+        end if;
+        if not visited.contains(s_hash) then
+            visited.insert(s_hash);
+            if stop_condition = false then
+                queue.append(S_Hash);
+            end if;
+        end if;
+    end;
+
+    procedure Generate_MSC is
+        package Loc_Maps is new Ordered_Maps(Key_Type     => Hash_Type,
+                                             Element_Type => Boolean);
+        package Evt_Lists is new Vectors(Element_Type => Event_ty,
+                                         Index_Type   => Vect_Count);
+        package Parent_Maps is new Ordered_Maps(Key_Type     => Hash_Type,
+                                                Element_Type => Edge_ty);
+        function Find_Path(From: Hash_Type) return Evt_Lists.Vector is
+            Loc_Q       : Lists.Vector;
+            Loc_Visited : Loc_Maps.Map;
+            Next_Hash   : Hash_Type;
+            State       : State_Access;
+            Parent_Map  : Parent_Maps.Map;
+            Curr        : Hash_Type;
+            Edge        : Edge_Ty;
+            Scenario    : Evt_Lists.Vector;
+        begin
+            Loc_Q.append(From);
+            Loc_Visited.Include(Key => From, New_Item => True);
+            while not Loc_Q.Is_Empty loop
+                Next_Hash := Loc_Q.Last_Element;
+                exit when Next_Hash = Start_Hash;
+                State := Grafset.Element(Key => Next_Hash);
+                for each_edge of State.Edges loop
+                    if not Loc_Visited.Contains(each_edge.state) then
+                        Loc_Q.append(Each_Edge.state);
+                        Loc_Visited.Include(Key      => each_edge.state,
+                                            New_Item => True);
+                        Parent_Map.Include(Key      => Each_Edge.State,
+                                           New_Item => (State => Next_Hash,
+                                                        Event => Each_Edge.Event));
+                    end if;
+                end loop;
+                Loc_Q.Delete_Last;
+            end loop;
+            Curr := Start_Hash;
+            Put_Line("Found path!");
+            while Parent_Map.Contains(Curr) loop
+                Edge := Parent_Map.Element(Curr);
+                Curr := Edge.State;
+                Scenario.Append(Edge.Event);
+            end loop;
+            return Scenario;
+        end;
+
+        Scenario : Evt_Lists.Vector;
+    begin
+        for each_hash of properties loop
+            put_line("Path from hash " & each_hash'img & " to hash " & start_hash'img);
+            Scenario := Find_Path(each_hash);
+            for each_evt of Scenario loop
+                Print_Event(each_evt);
+            end loop;
+        end loop;
+    end;
+end ASN1_Iterators.Exhaustive_Simulation;

asn1-iterators/src/asn1_iterators-exhaustive_simulation.ads

+-- (c) 2017 European Space Agency / TASTE Project
+
+with Ada.Unchecked_Conversion,
+     System,
+     Ada.Text_IO,
+     Ada.Streams,
+     Ada.Strings.Hash,
+     Ada.Containers.Ordered_Maps,
+     Ada.Containers.Ordered_Sets,
+     Ada.Containers.Vectors,
+     Ada.Calendar,
+     GNAT.MD5;
+
+use Ada.Containers,
+    Ada.Calendar,
+    Ada.Streams,
+    Ada.Text_IO;
+
+generic
+    type Context_ty is private;
+    Process_Ctxt:  access Context_ty;
+    type Event_ty is private;
+    with procedure Print_Event(event: Event_ty);
+    with function Check_Properties(errno: out natural) return Boolean;
+package ASN1_Iterators.Exhaustive_Simulation is
+
+    -- To save/restore the context when calling a PI:
+    backup_ctxt : Context_ty;
+    backup_hash : Hash_Type;
+    start_hash  : Hash_Type;
+
+    -- Set a maximum size for vectors (set of states and edges)
+    subtype Vect_Count is Positive range 1 .. 1000000;
+
+    -- An edge is made of a past state reference and an event to leave it
+    type Edge_ty is
+        record
+            event   : Event_ty;
+            state   : Hash_Type;
+    end record;
+
+    package Edges_Pkg is new Vectors (Element_Type => Edge_ty,
+                                      Index_Type   => Vect_Count);
+
+    -- A state is made of a context and a set of edges leading to it
+    type Global_State is
+        record
+            edges   : Edges_Pkg.Vector := Edges_Pkg.Empty_Vector;
+            context : Context_ty;
+    end record;
+
+    -- We store only pointers to graph states in the map
+    type State_Access is access Global_State;
+
+    -- The state graph itself is stored in a dictionary type (map)
+    package State_graph is new Ordered_Maps (Key_Type     => Hash_Type,
+                                             Element_Type => State_Access);
+    Grafset : State_graph.Map;
+
+    -- State graph index: Use md5 first to get a string representing
+    -- the context object, then strings.hash to get a number that can be used
+    -- as a map key. This can surely be improved!
+    Ctxt_Size: constant stream_element_offset :=
+           Context_ty'object_size / stream_element'size;
+    type SEA_Pointer is
+         access all Stream_Element_Array (1 .. Ctxt_Size);
+
+    function As_SEA_Ptr is
+       new Ada.Unchecked_Conversion (System.Address, SEA_Pointer);
+
+    function State_Hash(Context: Context_Ty) return Hash_Type;
+
+    -- Add a state to the graph: compute the hash (key) and store if not already there
+    function Add_to_graph(event : Event_ty) return Hash_Type;
+
+    -- To count the number of calls to the function's provided interfaces
+    Count : natural := 0;
+
+    -- Vector of hashes (integers) used for the model checking
+    package Lists is new Vectors (Element_Type => Hash_Type,
+                                  Index_type   => Vect_Count);
+
+    package Sets is new Ordered_Sets(Element_Type => Hash_Type);
+
+    Queue      : Lists.Vector;
+    Visited    : Sets.Set;
+    Properties : Sets.Set;
+
+    -- Report the result of the property check to the user
+    procedure Check_And_Report (S_Hash: Hash_Type);
+    procedure Generate_MSC;
+
+end ASN1_Iterators.Exhaustive_Simulation;

asn1-iterators/src/asn1_iterators-generic_basic.adb

+package body ASN1_Iterators.Generic_Basic is
+    procedure Initialize (self: in out Basic_ASN1_Iterator) is
+    begin
+        --Self.Value := create;
+        Self.Value.Initialize;
+    end;
+
+    function First (Item : Iterator) return Iterator_Ptr is
+    begin
+        Item.Ptr.Value.First;
+        return Item.Ptr;
+    end;
+
+    function Next (Item : Iterator;
+                   Ptr  : Iterator_Ptr) return Iterator_Ptr is
+    pragma Unreferenced (Item);
+    begin
+        Ptr.Value.Next;
+        return Ptr;
+    end;
+
+    function Iterate (self : Basic_ASN1_Iterator)
+        return Forward_Iterator is
+    begin
+       return I: Iterator do
+           I.Ptr := self'Unrestricted_Access;
+       end return;
+    end;
+end;

asn1-iterators/src/asn1_iterators-generic_basic.ads

+with Ada.Iterator_Interfaces;
+with Ada.Finalization;
+use Ada.Finalization;
+with ASN1_Iterators.SimpleTypes;
+
+generic
+    with package P is new SimpleTypes (<>);
+package ASN1_Iterators.Generic_Basic is
+    -- Provides an iterator for a basic type
+    subtype Element is P.Element;
+
+    type Basic_ASN1_Iterator is new Controlled
+    with record
+        Value : P.SimpleType;
+    end record
+        with Default_Iterator  => Iterate,
+             Iterator_Element  => P.Element,
+             Constant_Indexing => Elem_Value;
+
+    procedure Initialize(self: in out Basic_ASN1_Iterator);
+
+    type Iterator_Ptr is access all Basic_ASN1_Iterator;
+
+    function Has_Element (Ptr : Iterator_Ptr) return Boolean is
+        (Ptr.Value.Has_Element);
+
+    package Iterators is
+        new Ada.Iterator_Interfaces (Iterator_Ptr, Has_Element);
+
+    type Iterator is new Iterators.Forward_Iterator with record
+        Ptr : Iterator_Ptr;
+    end record;
+
+    function Ptr (Item: Iterator) return Iterator_Ptr is (Item.Ptr);
+
+    overriding function First (Item : Iterator)     return Iterator_Ptr;
+    overriding function Next  (Item : Iterator;
+                               Ptr  : Iterator_Ptr) return Iterator_Ptr;
+
+    subtype Forward_Iterator is Iterators.Forward_Iterator'Class;
+
+    function Iterate (self : Basic_ASN1_Iterator) return Forward_Iterator;
+
+    function Elem_Value (self : Basic_ASN1_Iterator;
+                         Ptr  : Iterator_Ptr)
+    return P.Element is (Ptr.Value.Element_Value);
+end;

asn1-iterators/src/asn1_iterators-generic_fixed_seqof.adb

+with Ada.Unchecked_Conversion;
+
+package body ASN1_Iterators.Generic_Fixed_SeqOf is
+
+    procedure Initialize (self: in out ASN1_SeqOf) is
+    begin
+      self.value.length := self.length;
+      if self.length > 1 then
+          self.Rest := new ASN1_SeqOf(self.Length - 1);
+          self.RestIt := new ASN1_SeqOf_It'(ASN1_SeqOf_It(self.Rest.Iterate));
+          self.RestIt.Ptr := self.RestIt.First;
+      end if;
+    end;
+
+    function Has_Element_SeqOf (Ptr: ASN1_SeqOf_Ptr) return Boolean is
+      (P.Has_Element(P.Ptr(Ptr.FirstIt)));
+
+    function Iterate (self : ASN1_SeqOf)
+      return Iterators_SeqOf.Forward_Iterator'Class is
+    begin
+     return I: ASN1_SeqOf_It do
+         I.Ptr := self'Unrestricted_Access;
+     end return;
+    end;
+
+
+    function First (Item : ASN1_SeqOf_It) return ASN1_SeqOf_Ptr is
+        Ptr_elem : P.Iterator_Ptr := P.Ptr(Item.Ptr.FirstIt);
+    begin
+      -- Initialize the iterator (Compute first value)
+      Item.Ptr.FirstIt := P.Iterator(Item.Ptr.FirstVal.Iterate);
+      Ptr_elem := P.First(Item.Ptr.FirstIt);
+      Item.Ptr.Value.Data(1) := P.Elem_Value(Item.Ptr.FirstVal,
+                                             Ptr_elem);
+      if Item.Ptr.Length > 1 then
+          Item.Ptr.Value.Data(2 .. Item.Ptr.Length) :=
+              Item.Ptr.RestIt.Ptr.Value.Data(1..Item.Ptr.RestIt.Ptr.Length);
+      end if;
+      return Item.Ptr;
+    end;
+
+    function Next (Item : ASN1_SeqOf_It;
+                 Ptr  : ASN1_SeqOf_Ptr) return ASN1_SeqOf_Ptr is
+        pragma Unreferenced (Item);
+        Ptr_elem : P.Iterator_Ptr := P.Ptr(Ptr.FirstIt);
+    begin
+      if Ptr.Length > 1 then
+          Ptr.RestIt.Ptr := Ptr.RestIt.Next (Ptr.RestIt.Ptr);
+          if Has_Element_SeqOf (Ptr.RestIt.Ptr) then
+              Ptr.Value.Data (2..Ptr.Length) :=
+                    Ptr.RestIt.Ptr.Value.Data (1..Ptr.RestIt.Ptr.Value.Length);
+          else
+              Ptr.RestIt.Ptr := Ptr.RestIt.First;
+              -- Exhausted "rest": iterate on the first item
+              Ptr_elem := P.Next(Ptr.FirstIt, Ptr_elem);
+              if P.Has_Element (Ptr_elem) then
+                  Ptr.Value.Data(1) := P.Elem_Value(Ptr.FirstVal, Ptr_elem);
+                  Ptr.Value.Data(2..Ptr.Length) := Ptr.RestIt.Ptr.Value.Data (1..Ptr.RestIt.Ptr.Length);
+              end if;
+          end if;
+     else
+         -- Size is 0 or 1
+         Ptr_elem := P.Next(Ptr.FirstIt, Ptr_elem);
+         if P.Has_Element (Ptr_elem) then
+             Ptr.Value.Data(1) := P.Elem_Value(Ptr.FirstVal, Ptr_elem);
+         end if;
+      end if;
+     return Ptr;
+    end;
+
+end;
+

asn1-iterators/src/asn1_iterators-generic_fixed_seqof.ads

+with Ada.Iterator_Interfaces;
+
+with Ada.Finalization;
+use Ada.Finalization;
+
+with ASN1_Iterators.Generic_Basic;
+
+generic
+    with package P is new Generic_Basic (<>);
+package ASN1_Iterators.Generic_Fixed_SeqOf is
+
+    type DataArray is array(natural range <>) of P.Element;
+    type SeqOf (Max: Natural) is record
+      Length : Integer;
+      Data   : DataArray(1..Max);
+    end record;
+
+    type ASN1_SeqOf_Ptr;
+    type ASN1_SeqOf_It;
+    type ASN1_SeqOf (Size: Natural) is new Controlled
+    with record
+      Length   : Natural := Size;
+      Value    : SeqOf (Size);
+      -- First value
+      FirstVal : P.Basic_ASN1_Iterator;
+      FirstIt  : P.Iterator;
+      -- The rest (recursive)
+      Rest     : access ASN1_SeqOf;
+      RestIt   : access ASN1_SeqOf_It;
+    end record
+      with Default_Iterator  => Iterate,
+           Iterator_Element  => SeqOf,
+           Constant_Indexing => Element_SeqOf_Value;
+
+    type ASN1_SeqOf_Ptr is access all ASN1_SeqOf;
+
+    --  Constructor (called automatically)
+    procedure Initialize(self: in out ASN1_SeqOf);
+
+    function Has_Element_SeqOf (Ptr : ASN1_SeqOf_Ptr) return Boolean;
+
+    package Iterators_SeqOf is
+      new Ada.Iterator_Interfaces (ASN1_SeqOf_Ptr, Has_Element_SeqOf);
+
+    type ASN1_SeqOf_It is new Iterators_SeqOf.Forward_Iterator with record
+      Ptr : ASN1_SeqOf_Ptr;
+    end record;
+
+    overriding function First (Item : ASN1_SeqOf_It)  return ASN1_SeqOf_Ptr;
+    overriding function Next  (Item : ASN1_SeqOf_It;
+                               Ptr  : ASN1_SeqOf_Ptr) return ASN1_SeqOf_Ptr;
+
+    function Iterate (self : ASN1_SeqOf)
+      return Iterators_SeqOf.Forward_Iterator'Class;
+
+    function Element_SeqOf_Value (self : ASN1_SeqOf;
+                                  Ptr  : ASN1_SeqOf_Ptr)
+      return SeqOf is (self.Value);
+
+
+end;

asn1-iterators/src/asn1_iterators-generic_integer.ads

+with ASN1_Iterators.SimpleTypes,
+     ASN1_Iterators.Generic_Basic;
+
+with Interfaces;
+use Interfaces;
+
+generic
+    Min: Interfaces.Integer_64;
+    Max: Interfaces.Integer_64;
+package ASN1_Iterators.Generic_Integer is
+    function Elem_Init return Interfaces.Integer_64 is (Min);
+    function Has_Elem(Value: Interfaces.Integer_64) return Boolean is
+        (Value <= Max);
+    function Elem_First return Interfaces.Integer_64 is (Min);
+    function Elem_Next(Value: Interfaces.Integer_64) return Interfaces.Integer_64 is
+        (Value + 1);
+
+    package Integer_type is new SimpleTypes(Element    => Interfaces.Integer_64,
+                                            Elem_Init  => Elem_Init,
+                                            Has_Elem   => Has_Elem,
+                                            Elem_First => Elem_First,
+                                            Elem_Next  => Elem_Next);
+
+    package It is new Generic_Basic (P => Integer_type);
+
+    subtype Instance is It.Basic_ASN1_Iterator;
+end;

asn1-iterators/src/asn1_iterators-generic_seqof.adb

+package body ASN1_Iterators.Generic_SeqOf is
+
+    procedure Initialize (self: in out ASN1_Variable_SeqOf) is
+    begin
+      self.value.length := self.length;
+      if self.length >= 1 then
+          self.RestVal := new P.ASN1_SeqOf(Self.Length);
+          self.RestIt := new P.ASN1_SeqOf_It'(P.ASN1_SeqOf_It(Self.RestVal.Iterate));
+          self.RestIt.Ptr := self.RestIt.First;
+      end if;
+    end;
+
+    function Has_Element_Variable_SeqOf (Ptr: ASN1_Variable_SeqOf_Ptr)
+     return Boolean is (Length_Pkg.Has_Element(Length_Pkg.Ptr(Ptr.LenIt)));
+
+    function Iterate (self : ASN1_Variable_SeqOf)
+      return Iterators_Variable_SeqOf.Forward_Iterator'Class is
+    begin
+     return I: ASN1_Variable_SeqOf_It do
+         I.Ptr := Self'Unrestricted_Access;
+     end return;
+    end;
+
+    function First (Item : ASN1_Variable_SeqOf_It) return ASN1_Variable_SeqOf_Ptr is
+    begin
+      -- Initialize the iterator (Compute first value)
+      Item.Ptr.LenIt  := Length_Pkg.Iterator(Item.Ptr.LenVal.Iterate);
+
+      --Item.Ptr.Value := Item.Ptr.RestIt.Ptr.Value;
+      -- Copy only the actual size, since the arrays may be different in size
+      Item.Ptr.Value.Data(1..Item.Ptr.RestIt.Ptr.Value.Data'Length) := Item.Ptr.RestIt.Ptr.Value.Data;
+      return Item.Ptr;
+    end;
+
+    function Next (Item : ASN1_Variable_SeqOf_It;
+                   Ptr  : ASN1_Variable_SeqOf_Ptr) return ASN1_Variable_SeqOf_Ptr is
+        pragma Unreferenced (Item);
+        Ptr_elem : Length_Pkg.Iterator_Ptr := Length_Pkg.Ptr(Ptr.LenIt);
+    begin
+      Ptr.RestIt.Ptr := Ptr.RestIt.Next (Ptr.RestIt.Ptr);
+      if P.Has_Element_SeqOf (Ptr.RestIt.Ptr) then
+          --Ptr.Value := Ptr.RestIt.Ptr.Value;
+          Ptr.Value.Data(1..Ptr.RestIt.Ptr.Value.Data'Length) := Ptr.RestIt.Ptr.Value.Data;
+      else
+          Ptr.RestIt.Ptr := Ptr.RestIt.First;
+          -- Exhausted "rest": iterate on the first item
+          Ptr_elem := Ptr.LenIt.Next(Ptr_elem);
+          if Length_Pkg.Has_Element (Ptr_elem) then
+              Ptr.Value.Length := Integer(Ptr_elem.Value.Value);
+              Ptr.Length := Ptr.Value.Length;
+              Ptr.RestVal := new P.ASN1_SeqOf(Ptr.Value.Length);
+              Ptr.RestIt := new P.ASN1_SeqOf_It'(P.ASN1_SeqOf_It(Ptr.RestVal.Iterate));
+              Ptr.RestIt.Ptr := Ptr.RestIt.First;
+              --Ptr.Value := Ptr.RestIt.Ptr.Value;
+              Ptr.Value.Data(1..Ptr.RestIt.Ptr.Value.Data'Length) := Ptr.RestIt.Ptr.Value.Data;
+          end if;
+     end if;
+     return Ptr;
+    end;
+
+end;
+

asn1-iterators/src/asn1_iterators-generic_seqof.ads

+with Ada.Iterator_Interfaces;
+
+with Ada.Finalization;
+use Ada.Finalization;
+
+with ASN1_Iterators.Generic_Fixed_SeqOF,
+     ASN1_Iterators.Generic_Integer,
+     ASN1_Iterators.Generic_Basic;
+
+with Interfaces;
+use Interfaces;
+
+-- Iterator for a variable-size array of basic type
+generic
+    Min : Natural;
+    Max : Natural;
+    with package Basic is new Generic_Basic (<>);
+package ASN1_Iterators.Generic_SeqOf is
+
+    Package P is new Generic_Fixed_SeqOF (P => Basic);
+    -- Create an integer type with a range constraint to iterate on
+    package Length_ty is new Generic_Integer (Integer_64(Min),
+                                              Integer_64(Max));
+    -- Instantiate the package to iterate on the integer for the length
+    package Length_Pkg renames Length_ty.It;
+
+    type ASN1_Variable_SeqOf_Ptr is private;
+    subtype MySeqOf is P.SeqOf(Max);
+    type ASN1_Variable_SeqOf is new Controlled
+    with record
+        Length   : Natural := Min;
+        Value    : MySeqOf; -- P.SeqOf(Max);
+        -- Iterate on the length
+        LenVal   : Length_ty.Instance;
+        LenIt    : Length_Pkg.Iterator;
+        -- And on the value
+        RestVal  : access P.ASN1_SeqOf;
+        RestIt   : access P.ASN1_SeqOf_It;
+    end record
+        with Default_Iterator  => Iterate,
+             Iterator_Element  => MySeqOf, --P.SeqOf,
+             Constant_Indexing => Element_Variable_SeqOf_Value;
+
+    --  Constructor (called automatically)
+    procedure Initialize(self: in out ASN1_Variable_SeqOf);
+
+    function Has_Element_Variable_SeqOf (Ptr : ASN1_Variable_SeqOf_Ptr)
+     return Boolean;
+
+    package Iterators_Variable_SeqOf is
+     new Ada.Iterator_Interfaces (ASN1_Variable_SeqOf_Ptr,
+                                  Has_Element_Variable_SeqOf);
+
+    type ASN1_Variable_SeqOf_It
+     is new Iterators_Variable_SeqOf.Forward_Iterator with record
+        Ptr : ASN1_Variable_SeqOf_Ptr;
+    end record;
+
+    overriding
+    function First (Item : ASN1_Variable_SeqOf_It)
+     return ASN1_Variable_SeqOf_Ptr;
+
+    overriding
+    function Next  (Item : ASN1_Variable_SeqOf_It;
+                    Ptr  : ASN1_Variable_SeqOf_Ptr)
+     return ASN1_Variable_SeqOf_Ptr;
+
+    function Iterate (self : ASN1_Variable_SeqOf)
+     return Iterators_Variable_SeqOf.Forward_Iterator'Class;
+
+    function Element_Variable_SeqOf_Value (Self : ASN1_Variable_SeqOf;
+                                           Ptr  : ASN1_Variable_SeqOf_Ptr)
+     --return P.SeqOf is (Self.Value);
+     return MySeqOf is (Self.Value);
+
+    subtype Instance is ASN1_Variable_SeqOf;
+
+    private
+    type ASN1_Variable_SeqOf_Ptr is access all ASN1_Variable_SeqOf;
+
+end;
+

asn1-iterators/src/asn1_iterators-simpletypes.adb

+package body ASN1_Iterators.SimpleTypes is
+    procedure Initialize (Self : in out SimpleType) is
+    begin
+        Self.Value := Elem_Init;
+    end;
+
+    procedure First (Self : in out SimpleType) is
+    begin
+        Self.Value := Elem_First;
+    end;
+
+    procedure Next (Self : in out SimpleType) is
+    begin
+        Self.Value := Elem_Next (Self.Value);
+    end;
+end;

asn1-iterators/src/asn1_iterators-simpletypes.ads

+generic
+    type Element is private;
+    with function Elem_Init return Element;
+    with function Has_Elem (Value: Element) return Boolean;
+    with function Elem_First return Element;
+    with function Elem_Next (Value: Element) return Element;
+package ASN1_Iterators.SimpleTypes is
+    type SimpleType is tagged
+    record