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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- A D A . S T R I N G S . W I D E _ M A P S --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-1998 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 2, 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. 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. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with Ada.Finalization;
package Ada.Strings.Wide_Maps is
pragma Preelaborate (Wide_Maps);
-------------------------------------
-- Wide Character Set Declarations --
-------------------------------------
type Wide_Character_Set is private;
-- Representation for a set of Wide_Character values:
Null_Set : constant Wide_Character_Set;
------------------------------------------
-- Constructors for Wide Character Sets --
------------------------------------------
type Wide_Character_Range is record
Low : Wide_Character;
High : Wide_Character;
end record;
-- Represents Wide_Character range Low .. High
type Wide_Character_Ranges is
array (Positive range <>) of Wide_Character_Range;
function To_Set
(Ranges : in Wide_Character_Ranges)
return Wide_Character_Set;
function To_Set
(Span : in Wide_Character_Range)
return Wide_Character_Set;
function To_Ranges
(Set : in Wide_Character_Set)
return Wide_Character_Ranges;
---------------------------------------
-- Operations on Wide Character Sets --
---------------------------------------
function "=" (Left, Right : in Wide_Character_Set) return Boolean;
function "not"
(Right : in Wide_Character_Set)
return Wide_Character_Set;
function "and"
(Left, Right : in Wide_Character_Set)
return Wide_Character_Set;
function "or"
(Left, Right : in Wide_Character_Set)
return Wide_Character_Set;
function "xor"
(Left, Right : in Wide_Character_Set)
return Wide_Character_Set;
function "-"
(Left, Right : in Wide_Character_Set)
return Wide_Character_Set;
function Is_In
(Element : in Wide_Character;
Set : in Wide_Character_Set)
return Boolean;
function Is_Subset
(Elements : in Wide_Character_Set;
Set : in Wide_Character_Set)
return Boolean;
function "<="
(Left : in Wide_Character_Set;
Right : in Wide_Character_Set)
return Boolean
renames Is_Subset;
subtype Wide_Character_Sequence is Wide_String;
-- Alternative representation for a set of character values
function To_Set
(Sequence : in Wide_Character_Sequence)
return Wide_Character_Set;
function To_Set
(Singleton : in Wide_Character)
return Wide_Character_Set;
function To_Sequence
(Set : in Wide_Character_Set)
return Wide_Character_Sequence;
-----------------------------------------
-- Wide Character Mapping Declarations --
-----------------------------------------
type Wide_Character_Mapping is private;
-- Representation for a wide character to wide character mapping:
function Value
(Map : in Wide_Character_Mapping;
Element : in Wide_Character)
return Wide_Character;
Identity : constant Wide_Character_Mapping;
---------------------------------
-- Operations on Wide Mappings --
---------------------------------
function To_Mapping
(From, To : in Wide_Character_Sequence)
return Wide_Character_Mapping;
function To_Domain
(Map : in Wide_Character_Mapping)
return Wide_Character_Sequence;
function To_Range
(Map : in Wide_Character_Mapping)
return Wide_Character_Sequence;
type Wide_Character_Mapping_Function is
access function (From : in Wide_Character) return Wide_Character;
private
package AF renames Ada.Finalization;
------------------------------------------
-- Representation of Wide_Character_Set --
------------------------------------------
-- A wide character set is represented as a sequence of wide character
-- ranges (i.e. an object of type Wide_Character_Ranges) in which the
-- following hold:
-- The lower bound is 1
-- The ranges are in order by increasing Low values
-- The ranges are non-overlapping and discontigous
-- A character value is in the set if it is contained in one of the
-- ranges. The actual Wide_Character_Set value is a controlled pointer
-- to this Wide_Character_Ranges value. The use of a controlled type
-- is necessary to prevent storage leaks.
type Wide_Character_Ranges_Access is access all Wide_Character_Ranges;
type Wide_Character_Set is new AF.Controlled with record
Set : Wide_Character_Ranges_Access;
end record;
pragma Finalize_Storage_Only (Wide_Character_Set);
-- This avoids useless finalizations, and, more importantly avoids
-- incorrect attempts to finalize constants that are statically
-- declared here and in Ada.Strings.Wide_Maps, which is incorrect.
procedure Initialize (Object : in out Wide_Character_Set);
procedure Adjust (Object : in out Wide_Character_Set);
procedure Finalize (Object : in out Wide_Character_Set);
Null_Range : aliased constant Wide_Character_Ranges :=
(1 .. 0 => (Low => ' ', High => ' '));
Null_Set : constant Wide_Character_Set :=
(AF.Controlled with
Set => Null_Range'Unrestricted_Access);
----------------------------------------------
-- Representation of Wide_Character_Mapping --
----------------------------------------------
-- A wide character mapping is represented as two strings of equal
-- length, where any character appearing in Domain is mapped to the
-- corresponding character in Rangev. A character not appearing in
-- Domain is mapped to itself. The characters in Domain are sorted
-- in ascending order.
-- The actual Wide_Character_Mapping value is a controlled record
-- that contains a pointer to a discriminated record containing the
-- range and domain values.
-- Note: this representation is canonical, and the values stored in
-- Domain and Rangev are exactly the values that are returned by the
-- functions To_Domain and To_Range. The use of a controlled type is
-- necessary to prevent storage leaks.
type Wide_Character_Mapping_Values (Length : Natural) is record
Domain : Wide_Character_Sequence (1 .. Length);
Rangev : Wide_Character_Sequence (1 .. Length);
end record;
type Wide_Character_Mapping_Values_Access is
access all Wide_Character_Mapping_Values;
type Wide_Character_Mapping is new AF.Controlled with record
Map : Wide_Character_Mapping_Values_Access;
end record;
pragma Finalize_Storage_Only (Wide_Character_Mapping);
-- This avoids useless finalizations, and, more importantly avoids
-- incorrect attempts to finalize constants that are statically
-- declared here and in Ada.Strings.Wide_Maps, which is incorrect.
procedure Initialize (Object : in out Wide_Character_Mapping);
procedure Adjust (Object : in out Wide_Character_Mapping);
procedure Finalize (Object : in out Wide_Character_Mapping);
Null_Map : aliased constant Wide_Character_Mapping_Values :=
(Length => 0,
Domain => "",
Rangev => "");
Identity : constant Wide_Character_Mapping :=
(AF.Controlled with
Map => Null_Map'Unrestricted_Access);
end Ada.Strings.Wide_Maps;
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