Subversion Repositories openrisc

------------------------------------------------------------------------------

--                                                                          --

--                         GNAT LIBRARY COMPONENTS                          --

--                                                                          --

--           ADA.CONTAINERS.HASH_TABLES.GENERIC_BOUNDED_OPERATIONS          --

--                                                                          --

--                                 S p e c                                  --

--                                                                          --

--          Copyright (C) 2004-2010, Free Software Foundation, Inc.         --

--                                                                          --

-- 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.                  --

------------------------------------------------------------------------------

--  Hash_Table_Type is used to implement hashed containers. This package

--  declares hash-table operations that do not depend on keys.

with Ada.Streams;

generic

   with package HT_Types is

     new Generic_Bounded_Hash_Table_Types (<>);

   use HT_Types;

   with function Hash_Node (Node : Node_Type) return Hash_Type;

   with function Next (Node : Node_Type) return Count_Type;

   with procedure Set_Next

     (Node : in out Node_Type;

      Next : Count_Type);

package Ada.Containers.Hash_Tables.Generic_Bounded_Operations is

   pragma Pure;

   function Index

     (Buckets : Buckets_Type;

      Node    : Node_Type) return Hash_Type;

   pragma Inline (Index);

   --  Uses the hash value of Node to compute its Buckets array index

   function Index

     (HT   : Hash_Table_Type'Class;

      Node : Node_Type) return Hash_Type;

   pragma Inline (Index);

   --  Uses the hash value of Node to compute its Hash_Table buckets array

   --  index.

   generic

      with function Find

        (HT  : Hash_Table_Type'Class;

         Key : Node_Type) return Boolean;

   function Generic_Equal (L, R : Hash_Table_Type'Class) return Boolean;

   --  Used to implement hashed container equality. For each node in hash table

   --  L, it calls Find to search for an equivalent item in hash table R. If

   --  Find returns False for any node then Generic_Equal terminates

   --  immediately and returns False. Otherwise if Find returns True for every

   --  node then Generic_Equal returns True.

   procedure Clear (HT : in out Hash_Table_Type'Class);

   --  Deallocates each node in hash table HT. (Note that it only deallocates

   --  the nodes, not the buckets array.)  Program_Error is raised if the hash

   --  table is busy.

   procedure Delete_Node_Sans_Free

     (HT : in out Hash_Table_Type'Class;

      X  : Count_Type);

   --  Removes node X from the hash table without deallocating the node

   generic

      with procedure Set_Element (Node : in out Node_Type);

   procedure Generic_Allocate

     (HT   : in out Hash_Table_Type'Class;

      Node : out Count_Type);

   --  Claim a node from the free store. Generic_Allocate first

   --  calls Set_Element on the potential node, and then returns

   --  the node's index as the value of the Node parameter.

   procedure Free

     (HT : in out Hash_Table_Type'Class;

      X  : Count_Type);

   --  Return a node back to the free store, from where it had

   --  been previously claimed via Generic_Allocate.

   function First (HT : Hash_Table_Type'Class) return Count_Type;

   --  Returns the head of the list in the first (lowest-index) non-empty

   --  bucket.

   function Next

     (HT   : Hash_Table_Type'Class;

      Node : Count_Type) return Count_Type;

   --  Returns the node that immediately follows Node. This corresponds to

   --  either the next node in the same bucket, or (if Node is the last node in

   --  its bucket) the head of the list in the first non-empty bucket that

   --  follows.

   generic

      with procedure Process (Node : Count_Type);

   procedure Generic_Iteration (HT : Hash_Table_Type'Class);

   --  Calls Process for each node in hash table HT

   generic

      use Ada.Streams;

      with procedure Write

        (Stream : not null access Root_Stream_Type'Class;

         Node   : Node_Type);

   procedure Generic_Write

     (Stream : not null access Root_Stream_Type'Class;

      HT     : Hash_Table_Type'Class);

   --  Used to implement the streaming attribute for hashed containers. It

   --  calls Write for each node to write its value into Stream.

   generic

      use Ada.Streams;

      with function New_Node (Stream : not null access Root_Stream_Type'Class)

         return Count_Type;

   procedure Generic_Read

     (Stream : not null access Root_Stream_Type'Class;

      HT     : out Hash_Table_Type'Class);

   --  Used to implement the streaming attribute for hashed containers. It

   --  first clears hash table HT, then populates the hash table by calling

   --  New_Node for each item in Stream.

end Ada.Containers.Hash_Tables.Generic_Bounded_Operations;