------------------------------------------------------------------------------
-- --
--- GNAT RUNTIME COMPONENTS --
+-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . W W D _ W C H A R --
-- --
-- B o d y --
-- --
--- Copyright (C) 1992-2005, Free Software Foundation, Inc. --
+-- 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 2, or (at your option) any later ver- --
+-- 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. 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. --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
--- 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. --
+-- 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. --
function Wide_Wide_Width_Wide_Wide_Char
(Lo, Hi : Wide_Wide_Character) return Natural
is
- W : Natural := 0;
LV : constant Unsigned_32 := Wide_Wide_Character'Pos (Lo);
HV : constant Unsigned_32 := Wide_Wide_Character'Pos (Hi);
if LV > HV then
return 0;
- end if;
+
+ -- 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.
- if LV <= 255 then
- W :=
+ else
+ return
System.WWd_Char.Wide_Wide_Width_Character
(Lo => Character'Val (LV),
Hi => Character'Val (Unsigned_32'Min (255, HV)));
- else
- W := 0;
- end if;
-
- -- Increase to at least 4 if FFFE or FFFF present. These correspond
- -- to the special language defined names FFFE/FFFF for these values.
-
- if 16#FFFF# in LV .. HV or else 16#FFFE# in LV .. HV then
- W := Natural'Max (W, 4);
end if;
-
- -- Increase to at least 3 if any wide characters, corresponding to
- -- the normal ' character ' sequence. We know that the character fits.
-
- if HV > 255 then
- W := Natural'Max (W, 3);
- end if;
-
- return W;
end Wide_Wide_Width_Wide_Wide_Char;
-------------------------------
function Wide_Width_Wide_Character
(Lo, Hi : Wide_Character) return Natural
is
- W : Natural := 0;
LV : constant Unsigned_32 := Wide_Character'Pos (Lo);
HV : constant Unsigned_32 := Wide_Character'Pos (Hi);
if LV > HV then
return 0;
- end if;
+
+ -- 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.
- if LV <= 255 then
- W :=
+ else
+ return
System.WWd_Char.Wide_Width_Character
(Lo => Character'Val (LV),
Hi => Character'Val (Unsigned_32'Min (255, HV)));
- else
- W := 0;
- end if;
-
- -- Increase to at least 4 if FFFE or FFFF present. These correspond
- -- to the special language defined names FFFE/FFFF for these values.
-
- if 16#FFFF# in LV .. HV or else 16#FFFE# in LV .. HV then
- W := Natural'Max (W, 4);
end if;
-
- -- Increase to at least 3 if any wide characters, corresponding to
- -- the normal 'character' sequence. We know that the character fits.
-
- if HV > 255 then
- W := Natural'Max (W, 3);
- end if;
-
- return W;
end Wide_Width_Wide_Character;
------------------------------------
-- Wide_Width_Wide_Wide_Character --
------------------------------------
- -- This is a nasty case, because we get into the business of representing
- -- out of range wide wide characters as wide strings. Let's let image do
- -- the work here. Too bad if this takes lots of time. It's silly anyway!
-
function Wide_Width_Wide_Wide_Character
(Lo, Hi : Wide_Wide_Character) return Natural
is
- W : Natural;
-
begin
- W := 0;
- for J in Lo .. Hi loop
- declare
- S : constant Wide_String := Wide_Wide_Character'Wide_Image (J);
- begin
- W := Natural'Max (W, S'Length);
- end;
- end loop;
-
- return W;
+ return Wide_Wide_Width_Wide_Wide_Char (Lo, Hi);
end Wide_Width_Wide_Wide_Character;
end System.Wwd_WChar;
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