------------------------------------------------------------------------------ -- -- -- GNAT RUNTIME COMPONENTS -- -- -- -- S Y S T E M . W W D _ W C H A R -- -- -- -- B o d y -- -- -- -- -- -- 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. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ 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;