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------------------------------------------------------------------------------
--                                                                          --
--                         GNAT LIBRARY COMPONENTS                          --
--                                                                          --
--       A D A . C O N T A I N E R S . B O U N D E D _ V E C T O R S        --
--                                                                          --
--                                 S p e c                                  --
--                                                                          --
--          Copyright (C) 2004-2010, Free Software Foundation, Inc.         --
--                                                                          --
-- This specification is derived from the Ada Reference Manual for use with --
-- GNAT. The copyright notice above, and the license provisions that follow --
-- apply solely to the  contents of the part following the private keyword. --
--                                                                          --
-- GNAT is free software;  you can  redistribute it  and/or modify it 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.  GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT 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/>.                                          --
--                                                                          --
-- This unit was originally developed by Matthew J Heaney.                  --
------------------------------------------------------------------------------

private with Ada.Streams;

generic
   type Index_Type is range <>;
   type Element_Type is private;

   with function "=" (Left, Right : Element_Type) return Boolean is <>;

package Ada.Containers.Bounded_Vectors is
   pragma Pure;
   pragma Remote_Types;

   subtype Extended_Index is Index_Type'Base
     range Index_Type'First - 1 ..
           Index_Type'Min (Index_Type'Base'Last - 1, Index_Type'Last) + 1;

   No_Index : constant Extended_Index := Extended_Index'First;

   type Vector (Capacity : Count_Type) is tagged private;
   pragma Preelaborable_Initialization (Vector);

   type Cursor is private;
   pragma Preelaborable_Initialization (Cursor);

   Empty_Vector : constant Vector;

   No_Element : constant Cursor;

   overriding function "=" (Left, Right : Vector) return Boolean;

   function To_Vector (Length : Count_Type) return Vector;

   function To_Vector
     (New_Item : Element_Type;
      Length   : Count_Type) return Vector;

   function "&" (Left, Right : Vector) return Vector;

   function "&" (Left : Vector; Right : Element_Type) return Vector;

   function "&" (Left : Element_Type; Right : Vector) return Vector;

   function "&" (Left, Right : Element_Type) return Vector;

   function Capacity (Container : Vector) return Count_Type;

   procedure Reserve_Capacity
     (Container : in out Vector;
      Capacity  : Count_Type);

   function Length (Container : Vector) return Count_Type;

   procedure Set_Length
     (Container : in out Vector;
      Length    : Count_Type);

   function Is_Empty (Container : Vector) return Boolean;

   procedure Clear (Container : in out Vector);

   function To_Cursor
     (Container : Vector;
      Index     : Extended_Index) return Cursor;

   function To_Index (Position : Cursor) return Extended_Index;

   function Element
     (Container : Vector;
      Index     : Index_Type) return Element_Type;

   function Element (Position : Cursor) return Element_Type;

   procedure Replace_Element
     (Container : in out Vector;
      Index     : Index_Type;
      New_Item  : Element_Type);

   procedure Replace_Element
     (Container : in out Vector;
      Position  : Cursor;
      New_Item  : Element_Type);

   procedure Query_Element
     (Container : Vector;
      Index     : Index_Type;
      Process   : not null access procedure (Element : Element_Type));

   procedure Query_Element
     (Position : Cursor;
      Process  : not null access procedure (Element : Element_Type));

   procedure Update_Element
     (Container : in out Vector;
      Index     : Index_Type;
      Process   : not null access procedure (Element : in out Element_Type));

   procedure Update_Element
     (Container : in out Vector;
      Position  : Cursor;
      Process   : not null access procedure (Element : in out Element_Type));

   procedure Assign (Target : in out Vector; Source : Vector);

   function Copy (Source : Vector; Capacity : Count_Type := 0) return Vector;

   procedure Move (Target : in out Vector; Source : in out Vector);

   procedure Insert
     (Container : in out Vector;
      Before    : Extended_Index;
      New_Item  : Vector);

   procedure Insert
     (Container : in out Vector;
      Before    : Cursor;
      New_Item  : Vector);

   procedure Insert
     (Container : in out Vector;
      Before    : Cursor;
      New_Item  : Vector;
      Position  : out Cursor);

   procedure Insert
     (Container : in out Vector;
      Before    : Extended_Index;
      New_Item  : Element_Type;
      Count     : Count_Type := 1);

   procedure Insert
     (Container : in out Vector;
      Before    : Cursor;
      New_Item  : Element_Type;
      Count     : Count_Type := 1);

   procedure Insert
     (Container : in out Vector;
      Before    : Cursor;
      New_Item  : Element_Type;
      Position  : out Cursor;
      Count     : Count_Type := 1);

   procedure Insert
     (Container : in out Vector;
      Before    : Extended_Index;
      Count     : Count_Type := 1);

   procedure Insert
     (Container : in out Vector;
      Before    : Cursor;
      Position  : out Cursor;
      Count     : Count_Type := 1);

   procedure Prepend
     (Container : in out Vector;
      New_Item  : Vector);

   procedure Prepend
     (Container : in out Vector;
      New_Item  : Element_Type;
      Count     : Count_Type := 1);

   procedure Append
     (Container : in out Vector;
      New_Item  : Vector);

   procedure Append
     (Container : in out Vector;
      New_Item  : Element_Type;
      Count     : Count_Type := 1);

   procedure Insert_Space
     (Container : in out Vector;
      Before    : Extended_Index;
      Count     : Count_Type := 1);

   procedure Insert_Space
     (Container : in out Vector;
      Before    : Cursor;
      Position  : out Cursor;
      Count     : Count_Type := 1);

   procedure Delete
     (Container : in out Vector;
      Index     : Extended_Index;
      Count     : Count_Type := 1);

   procedure Delete
     (Container : in out Vector;
      Position  : in out Cursor;
      Count     : Count_Type := 1);

   procedure Delete_First
     (Container : in out Vector;
      Count     : Count_Type := 1);

   procedure Delete_Last
     (Container : in out Vector;
      Count     : Count_Type := 1);

   procedure Reverse_Elements (Container : in out Vector);

   procedure Swap (Container : in out Vector; I, J : Index_Type);

   procedure Swap (Container : in out Vector; I, J : Cursor);

   function First_Index (Container : Vector) return Index_Type;

   function First (Container : Vector) return Cursor;

   function First_Element (Container : Vector) return Element_Type;

   function Last_Index (Container : Vector) return Extended_Index;

   function Last (Container : Vector) return Cursor;

   function Last_Element (Container : Vector) return Element_Type;

   function Next (Position : Cursor) return Cursor;

   procedure Next (Position : in out Cursor);

   function Previous (Position : Cursor) return Cursor;

   procedure Previous (Position : in out Cursor);

   function Find_Index
     (Container : Vector;
      Item      : Element_Type;
      Index     : Index_Type := Index_Type'First) return Extended_Index;

   function Find
     (Container : Vector;
      Item      : Element_Type;
      Position  : Cursor := No_Element) return Cursor;

   function Reverse_Find_Index
     (Container : Vector;
      Item      : Element_Type;
      Index     : Index_Type := Index_Type'Last) return Extended_Index;

   function Reverse_Find
     (Container : Vector;
      Item      : Element_Type;
      Position  : Cursor := No_Element) return Cursor;

   function Contains
     (Container : Vector;
      Item      : Element_Type) return Boolean;

   function Has_Element (Position : Cursor) return Boolean;

   procedure Iterate
     (Container : Vector;
      Process   : not null access procedure (Position : Cursor));

   procedure Reverse_Iterate
     (Container : Vector;
      Process   : not null access procedure (Position : Cursor));

   generic
      with function "<" (Left, Right : Element_Type) return Boolean is <>;
   package Generic_Sorting is

      function Is_Sorted (Container : Vector) return Boolean;

      procedure Sort (Container : in out Vector);

      procedure Merge (Target : in out Vector; Source : in out Vector);

   end Generic_Sorting;

private

   pragma Inline (First_Index);
   pragma Inline (Last_Index);
   pragma Inline (Element);
   pragma Inline (First_Element);
   pragma Inline (Last_Element);
   pragma Inline (Query_Element);
   pragma Inline (Update_Element);
   pragma Inline (Replace_Element);
   pragma Inline (Is_Empty);
   pragma Inline (Contains);
   pragma Inline (Next);
   pragma Inline (Previous);

   type Elements_Array is array (Count_Type range <>) of Element_Type;
   function "=" (L, R : Elements_Array) return Boolean is abstract;

   type Vector (Capacity : Count_Type) is tagged record
      Elements : Elements_Array (1 .. Capacity);
      Last     : Extended_Index := No_Index;
      Busy     : Natural := 0;
      Lock     : Natural := 0;
   end record;

   use Ada.Streams;

   procedure Write
     (Stream    : not null access Root_Stream_Type'Class;
      Container : Vector);

   for Vector'Write use Write;

   procedure Read
     (Stream    : not null access Root_Stream_Type'Class;
      Container : out Vector);

   for Vector'Read use Read;

   type Vector_Access is access all Vector;
   for Vector_Access'Storage_Size use 0;

   type Cursor is record
      Container : Vector_Access;
      Index     : Index_Type := Index_Type'First;
   end record;

   procedure Write
     (Stream   : not null access Root_Stream_Type'Class;
      Position : Cursor);

   for Cursor'Write use Write;

   procedure Read
     (Stream   : not null access Root_Stream_Type'Class;
      Position : out Cursor);

   for Cursor'Read use Read;

   Empty_Vector : constant Vector := (Capacity => 0, others => <>);

   No_Element : constant Cursor := Cursor'(null, Index_Type'First);

end Ada.Containers.Bounded_Vectors;