gcc/ada/s-wwdcha.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                      S Y S T E M . W W D _ C H A R                       --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2009, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 package body System.WWd_Char is
  33
  34    --------------------------
  35    -- Wide_Width_Character --
  36    --------------------------
  37
  38    function Wide_Width_Character (Lo, Hi : Character) return Natural is
  39       W : Natural;
  40
  41    begin
  42       W := 0;
  43       for C in Lo .. Hi loop
  44          declare
  45             S : constant Wide_String := Character'Wide_Image (C);
  46          begin
  47             W := Natural'Max (W, S'Length);
  48          end;
  49       end loop;
  50
  51       return W;
  52    end Wide_Width_Character;
  53
  54    -------------------------------
  55    -- Wide_Wide_Width_Character --
  56    -------------------------------
  57
  58    function Wide_Wide_Width_Character (Lo, Hi : Character) return Natural is
  59       W : Natural;
  60
  61    begin
  62       W := 0;
  63       for C in Lo .. Hi loop
  64          declare
  65             S : constant String := Character'Image (C);
  66          begin
  67             W := Natural'Max (W, S'Length);
  68          end;
  69       end loop;
  70
  71       return W;
  72    end Wide_Wide_Width_Character;
  73
  74 end System.WWd_Char;