------------------------------------------------------------------------------
-- --
--- GNAT RUNTIME COMPONENTS --
+-- GNAT RUN-TIME COMPONENTS --
-- --
-- G N A T . T A B L E --
-- --
-- S p e c --
-- --
--- --
--- Copyright (C) 1998-2001 Ada Core Technologies, Inc. --
+-- Copyright (C) 1998-2009, AdaCore --
-- --
-- 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- --
-- 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 distributed with GNAT; see file COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
+-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
+-- Boston, MA 02110-1301, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
--- GNAT is maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+-- GNAT was originally developed by the GNAT team at New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
Table_Increment : Natural;
package GNAT.Table is
-pragma Elaborate_Body (Table);
+ pragma Elaborate_Body;
-- Table_Component_Type and Table_Index_Type specify the type of the
-- array, Table_Low_Bound is the lower bound. Index_type must be an
-- restrict the use of table for discriminated types. If it is necessary
-- to take the access of a table element, use Unrestricted_Access.
+ -- WARNING: On HPPA, the virtual addressing approach used in this unit
+ -- is incompatible with the indexing instructions on the HPPA. So when
+ -- using this unit, compile your application with -mdisable-indexing.
+
+ -- WARNING: If the table is reallocated, then the address of all its
+ -- components will change. So do not capture the address of an element
+ -- and then use the address later after the table may be reallocated.
+ -- One tricky case of this is passing an element of the table to a
+ -- subprogram by reference where the table gets reallocated during
+ -- the execution of the subprogram. The best rule to follow is never
+ -- to pass a table element as a parameter except for the case of IN
+ -- mode parameters with scalar values.
+
type Table_Type is
array (Table_Index_Type range <>) of Table_Component_Type;
-
subtype Big_Table_Type is
Table_Type (Table_Low_Bound .. Table_Index_Type'Last);
-- We work with pointers to a bogus array type that is constrained
-- with the maximum possible range bound. This means that the pointer
-- is a thin pointer, which is more efficient. Since subscript checks
-- in any case must be on the logical, rather than physical bounds,
- -- safety is not compromised by this approach.
+ -- safety is not compromised by this approach. These types should never
+ -- be used by the client.
type Table_Ptr is access all Big_Table_Type;
- -- The table is actually represented as a pointer to allow reallocation
+ for Table_Ptr'Storage_Size use 0;
+ -- The table is actually represented as a pointer to allow reallocation.
+ -- This type should never be used by the client.
Table : aliased Table_Ptr := null;
-- The table itself. The lower bound is the value of Low_Bound.
-- array value. Current array values are not affected by this call.
procedure Free;
- -- Free all allocated memory for the table. A call to init is required
+ -- Free all allocated memory for the table. A call to Init is required
-- before any use of this table after calling Free.
First : constant Table_Index_Type := Table_Low_Bound;
procedure Increment_Last;
pragma Inline (Increment_Last);
- -- Adds 1 to Last (same as Set_Last (Last + 1).
+ -- Adds 1 to Last (same as Set_Last (Last + 1)
procedure Decrement_Last;
pragma Inline (Decrement_Last);
- -- Subtracts 1 from Last (same as Set_Last (Last - 1).
+ -- Subtracts 1 from Last (same as Set_Last (Last - 1)
procedure Append (New_Val : Table_Component_Type);
pragma Inline (Append);
-- i.e. the table size is increased by one, and the given new item
-- stored in the newly created table element.
+ procedure Append_All (New_Vals : Table_Type);
+ -- Appends all components of New_Vals
+
procedure Set_Item
(Index : Table_Index_Type;
Item : Table_Component_Type);
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