105 lines
4 KiB
Ada
105 lines
4 KiB
Ada
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------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME COMPONENTS --
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-- --
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-- S Y S T E M . W I D _ W C H A R --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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package body System.Wid_WChar is
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--------------------------
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-- Width_Wide_Character --
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--------------------------
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function Width_Wide_Character
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(Lo, Hi : Wide_Character) return Natural
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is
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W : Natural;
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P : Natural;
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begin
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W := 0;
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for C in Lo .. Hi loop
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P := Wide_Character'Pos (C);
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-- Here if we find a character in wide character range
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-- Width is max value (12) for Hex_hhhhhhhh
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if P > 16#FF# then
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return 12;
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-- If we are in character range then use length of character image
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else
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declare
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S : constant String := Character'Image (Character'Val (P));
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begin
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W := Natural'Max (W, S'Length);
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end;
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end if;
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end loop;
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return W;
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end Width_Wide_Character;
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-------------------------------
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-- Width_Wide_Wide_Character --
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-------------------------------
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function Width_Wide_Wide_Character
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(Lo, Hi : Wide_Wide_Character) return Natural
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is
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W : Natural;
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P : Natural;
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begin
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W := 0;
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for C in Lo .. Hi loop
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P := Wide_Wide_Character'Pos (C);
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-- Here if we find a character in wide wide character range.
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-- Width is max value (12) for Hex_hhhhhhhh
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if P > 16#FF# then
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W := 12;
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-- If we are in character range then use length of character image
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else
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declare
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S : constant String := Character'Image (Character'Val (P));
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begin
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W := Natural'Max (W, S'Length);
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end;
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end if;
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end loop;
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return W;
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end Width_Wide_Wide_Character;
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end System.Wid_WChar;
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