+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNAT RUNTIME COMPONENTS --
--- --
--- G N A T . H E A P _ S O R T _ A --
--- --
--- S p e c --
--- --
--- $Revision: 1.1 $
--- --
--- Copyright (C) 1995-2000 Ada Core Technologies, Inc. --
--- --
--- 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, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
--- --
--- As a special exception, if other files instantiate generics from this --
--- unit, or you link this unit with other files to produce an executable, --
--- this unit does not by itself cause the resulting executable to be --
--- covered by the GNU General Public License. This exception does not --
--- however invalidate any other reasons why the executable file might be --
--- covered by the GNU Public License. --
--- --
--- GNAT is maintained by Ada Core Technologies Inc (http://www.gnat.com). --
--- --
-------------------------------------------------------------------------------
-
--- Heapsort using access to procedure parameters
-
--- This package provides a heapsort routine that works with access to
--- subprogram parameters, so that it can be used with different types with
--- shared sorting code. See also GNAT.Heap_Sort_G, the generic version,
--- which is a little more efficient but does not allow code sharing.
--- The generic version is also Pure, while the access version can
--- only be Preelaborate.
-
-package GNAT.Heap_Sort_A is
-pragma Preelaborate (Heap_Sort_A);
-
- -- 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. In addition, the
- -- index value zero is used for a temporary location used during the sort.
-
- type Move_Procedure is access procedure (From : Natural; To : Natural);
- -- A pointer to a procedure that moves the data item with index From to
- -- the data item with index To. An index value of zero is used for moves
- -- from and to the single temporary location used by the sort.
-
- 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 Op1 is less than the item with index Op2, and False
- -- if the Op1 item is greater than or equal to the Op2 item.
-
- procedure Sort (N : Natural; Move : Move_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 Move to move
- -- items around. Note that, as described above, both Move and Lt use a
- -- single temporary location with index value zero. This sort is not
- -- stable, i.e. the order of equal elements in the input is not preserved.
-
-end GNAT.Heap_Sort_A;
projects / msp430-gcc.git / blobdiff