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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . W W D _ W C H A R --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2009, 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/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with Interfaces; use Interfaces;
with System.WWd_Char;
package body System.Wwd_WChar is
------------------------------------
-- Wide_Wide_Width_Wide_Character --
------------------------------------
-- This is the case where we are talking about the Wide_Wide_Image of
-- a Wide_Character, which is always the same character sequence as the
-- Wide_Image of the same Wide_Character.
function Wide_Wide_Width_Wide_Character
(Lo, Hi : Wide_Character) return Natural
is
begin
return Wide_Width_Wide_Character (Lo, Hi);
end Wide_Wide_Width_Wide_Character;
------------------------------------
-- Wide_Wide_Width_Wide_Wide_Char --
------------------------------------
function Wide_Wide_Width_Wide_Wide_Char
(Lo, Hi : Wide_Wide_Character) return Natural
is
LV : constant Unsigned_32 := Wide_Wide_Character'Pos (Lo);
HV : constant Unsigned_32 := Wide_Wide_Character'Pos (Hi);
begin
-- Return zero if empty range
if LV > HV then
return 0;
-- Return max value (12) for wide character (Hex_hhhhhhhh)
elsif HV > 255 then
return 12;
-- If any characters in normal character range, then use normal
-- Wide_Wide_Width attribute on this range to find out a starting point.
-- Otherwise start with zero.
else
return
System.WWd_Char.Wide_Wide_Width_Character
(Lo => Character'Val (LV),
Hi => Character'Val (Unsigned_32'Min (255, HV)));
end if;
end Wide_Wide_Width_Wide_Wide_Char;
-------------------------------
-- Wide_Width_Wide_Character --
-------------------------------
function Wide_Width_Wide_Character
(Lo, Hi : Wide_Character) return Natural
is
LV : constant Unsigned_32 := Wide_Character'Pos (Lo);
HV : constant Unsigned_32 := Wide_Character'Pos (Hi);
begin
-- Return zero if empty range
if LV > HV then
return 0;
-- Return max value (12) for wide character (Hex_hhhhhhhh)
elsif HV > 255 then
return 12;
-- If any characters in normal character range, then use normal
-- Wide_Wide_Width attribute on this range to find out a starting point.
-- Otherwise start with zero.
else
return
System.WWd_Char.Wide_Width_Character
(Lo => Character'Val (LV),
Hi => Character'Val (Unsigned_32'Min (255, HV)));
end if;
end Wide_Width_Wide_Character;
------------------------------------
-- Wide_Width_Wide_Wide_Character --
------------------------------------
function Wide_Width_Wide_Wide_Character
(Lo, Hi : Wide_Wide_Character) return Natural
is
begin
return Wide_Wide_Width_Wide_Wide_Char (Lo, Hi);
end Wide_Width_Wide_Wide_Character;
end System.Wwd_WChar;
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