gcc/ada/g-busorg.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUNTIME COMPONENTS                          --
   4 --                                                                          --
   5 --                   G N A T . B U B B L E _ S O R T _ G                    --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --                            $Revision: 1.4 $                              --
  10 --                                                                          --
  11 --           Copyright (C) 1995-1998 Ada Core Technologies, Inc.            --
  12 --                                                                          --
  13 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  14 -- terms of the  GNU General Public License as published  by the Free Soft- --
  15 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  16 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  17 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  18 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  19 -- for  more details.  You should have  received  a copy of the GNU General --
  20 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  21 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  22 -- MA 02111-1307, USA.                                                      --
  23 --                                                                          --
  24 -- As a special exception,  if other files  instantiate  generics from this --
  25 -- unit, or you link  this unit with other files  to produce an executable, --
  26 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  27 -- covered  by the  GNU  General  Public  License.  This exception does not --
  28 -- however invalidate  any other reasons why  the executable file  might be --
  29 -- covered by the  GNU Public License.                                      --
  30 --                                                                          --
  31 -- GNAT is maintained by Ada Core Technologies Inc (http://www.gnat.com).   --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 package body GNAT.Bubble_Sort_G is
  36
  37    ----------
  38    -- Sort --
  39    ----------
  40
  41    procedure Sort (N : Natural) is
  42       Switched : Boolean;
  43
  44    begin
  45       loop
  46          Switched := False;
  47
  48          for J in 1 .. N - 1 loop
  49             if Lt (J + 1, J) then
  50                Move (J, 0);
  51                Move (J + 1, J);
  52                Move (0, J + 1);
  53                Switched := True;
  54             end if;
  55          end loop;
  56
  57          exit when not Switched;
  58       end loop;
  59    end Sort;
  60
  61 end GNAT.Bubble_Sort_G;