| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME COMPONENTS -- |
| -- -- |
| -- S Y S T E M . W I D _ W C H A R -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 1992-2021, 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; |
