New Language: Ada

From-SVN: r45957

1 files changed, 77 insertions, 0 deletions

diff --git a/gcc/ada/s-wwdwch.adb b/gcc/ada/s-wwdwch.adb
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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUNTIME COMPONENTS                          --
+--                                                                          --
+--                     S Y S T E M . W W D _ W C H A R                      --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--                            $Revision: 1.4 $
+--                                                                          --
+--          Copyright (C) 1992-2000, 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- --
+-- 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. --
+-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+--                                                                          --
+------------------------------------------------------------------------------
+
+package body System.Wwd_WChar is
+
+   -------------------------------
+   -- Wide_Width_Wide_Character --
+   -------------------------------
+
+   function Wide_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);
+
+         --  If we are in wide character range, the length is always 3
+         --  and we are done, since all remaining characters are the same.
+
+         if P > 255 then
+            return Natural'Max (W, 3);
+
+         --  If we are in character range then use length of character image
+         --  Is this right, what about wide char encodings of 80-FF???
+
+         else
+            declare
+               S : Wide_String := Character'Wide_Image (Character'Val (P));
+
+            begin
+               W := Natural'Max (W, S'Length);
+            end;
+         end if;
+      end loop;
+
+      return W;
+   end Wide_Width_Wide_Character;
+
+end System.Wwd_WChar;