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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . W I 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. --
-- --
------------------------------------------------------------------------------
package body System.Wid_WChar is
--------------------------
-- Width_Wide_Character --
--------------------------
function Width_Wide_Character
(Lo, Hi : Wide_Character) return Natural
is
W : Natural;
P : Natural;
begin
W := 0;
for C in Lo .. Hi loop
P := Wide_Character'Pos (C);
-- Here if we find a character in wide character range
-- Width is max value (12) for Hex_hhhhhhhh
if P > 16#FF# then
return 12;
-- If we are in character range then use length of character image
else
declare
S : constant String := Character'Image (Character'Val (P));
begin
W := Natural'Max (W, S'Length);
end;
end if;
end loop;
return W;
end Width_Wide_Character;
-------------------------------
-- Width_Wide_Wide_Character --
-------------------------------
function Width_Wide_Wide_Character
(Lo, Hi : Wide_Wide_Character) return Natural
is
W : Natural;
P : Natural;
begin
W := 0;
for C in Lo .. Hi loop
P := Wide_Wide_Character'Pos (C);
-- Here if we find a character in wide wide character range.
-- Width is max value (12) for Hex_hhhhhhhh
if P > 16#FF# then
W := 12;
-- If we are in character range then use length of character image
else
declare
S : constant String := Character'Image (Character'Val (P));
begin
W := Natural'Max (W, S'Length);
end;
end if;
end loop;
return W;
end Width_Wide_Wide_Character;
end System.Wid_WChar;
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