73 lines
4.2 KiB
Ada
73 lines
4.2 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME COMPONENTS --
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-- --
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-- G N A T . B U B B L E _ S O R T _ G --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 1995-2010, AdaCore --
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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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-- Bubblesort generic package using formal procedures
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-- This package provides a generic bubble sort routine that can be used with
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-- different types of data.
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-- See also GNAT.Bubble_Sort, a version that works with subprogram access
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-- parameters, allowing code sharing. The generic version is slightly more
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-- efficient but does not allow code sharing and has an interface that is
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-- more awkward to use.
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-- There is also GNAT.Bubble_Sort_A, which is now considered obsolete, but
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-- was an older version working with subprogram parameters. This version
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-- is retained for backwards compatibility with old versions of GNAT.
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generic
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-- The data to be sorted is assumed to be indexed by integer values from
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-- 1 to N, where N is the number of items to be sorted. In addition, the
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-- index value zero is used for a temporary location used during the sort.
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with procedure Move (From : Natural; To : Natural);
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-- A procedure that moves the data item with index value From to the data
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-- item with index value To (the old value in To being lost). An index
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-- value of zero is used for moves from and to a single temporary location
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-- used by the sort.
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with function Lt (Op1, Op2 : Natural) return Boolean;
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-- A function that compares two items and returns True if the item with
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-- index Op1 is less than the item with Index Op2, and False if the Op2
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-- item is greater than or equal to the Op1 item.
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package GNAT.Bubble_Sort_G is
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pragma Pure;
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procedure Sort (N : Natural);
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-- This procedures sorts items in the range from 1 to N into ascending
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-- order making calls to Lt to do required comparisons, and Move to move
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-- items around. Note that, as described above, both Move and Lt use a
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-- single temporary location with index value zero. This sort is stable,
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-- that is the order of equal elements in the input is preserved.
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end GNAT.Bubble_Sort_G;
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