Ada Programming/Libraries/GNAT.Bubble Sort

-- --                                                                         -- --                         GNAT RUN-TIME COMPONENTS                         -- --                                                                         -- --                     G N A T. B U B B L E _ S O R T                     -- --                                                                         -- --                                 S p e c                                  -- --                                                                         -- --                     Copyright (C) 1995-2005, AdaCore                     -- --                                                                         -- -- 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 2,  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. See the GNU General Public License -- -- for more details. You should have received  a copy of the GNU General -- -- Public License distributed with GNAT;  see file COPYING. If not, write -- -- to the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, -- -- Boston, MA 02110-1301, USA. -- --                                                                         -- -- -- -- -- -- -- -- -- GNAT was originally developed  by the GNAT team at  New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc.     -- --                                                                         -- --

-- Sort Utility (Using Bubblesort Algorithm)

-- This package provides a bubblesort routine that works with access to --  subprogram parameters, so that it can be used with different types with -- shared sorting code.

-- See also GNAT.Bubble_Sort_G and GNAT.Bubble_Sort_A. These are older -- versions of this routine. In some cases GNAT.Bubble_Sort_G may be a -- little faster than GNAT.Bubble_Sort, at the expense of generic code -- duplication and a less convenient interface. The generic version also -- has the advantage of being Pure, while this unit can only be Preelaborate.

package GNAT.Bubble_Sort is  pragma Preelaborate;

-- The data to be sorted is assumed to be indexed by integer values from -- 1 to N, where N is the number of items to be sorted.

type Xchg_Procedure is access procedure (Op1, Op2 : Natural); -- A pointer to a procedure that exchanges the two data items whose -- index values are Op1 and Op2.

type Lt_Function is access function (Op1, Op2 : Natural) return Boolean; -- A pointer to a function that compares two items and returns True if   --  the item with index value Op1 is less than the item with Index value -- Op2, and False if the Op1 item is greater than or equal to the Op2 -- item.

procedure Sort (N : Natural; Xchg : Xchg_Procedure; Lt : Lt_Function); -- This procedures sorts items in the range from 1 to N into ascending -- order making calls to Lt to do required comparisons, and calls to   --  Xchg to exchange items. The sort is stable, that is the order of  --  equal items in the input is preserved.

end GNAT.Bubble_Sort;

|GNAT.Bubble Sort