------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME COMPONENTS -- -- -- -- S Y S T E M . W W D _ W C H A R -- -- -- -- B o d y -- -- -- -- Copyright (C) 1992-2020, 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 -- -- . -- -- -- -- 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;