1------------------------------------------------------------------------------
2--                                                                          --
3--                   GNU ADA RUNTIME LIBRARY COMPONENTS                     --
4--                                                                          --
5--      S Y S T E M . C O M P A R E _ A R R A Y _ U N S I G N E D _ 1 6     --
6--                                                                          --
7--                                 S p e c                                  --
8--                                                                          --
9--             Copyright (C) 2002 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 2,  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.  See the GNU General Public License --
17-- for  more details.  You should have  received  a copy of the GNU General --
18-- Public License  distributed with GNAT;  see file COPYING.  If not, write --
19-- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
20-- MA 02111-1307, USA.                                                      --
21--                                                                          --
22-- As a special exception,  if other files  instantiate  generics from this --
23-- unit, or you link  this unit with other files  to produce an executable, --
24-- this  unit  does not  by itself cause  the resulting  executable  to  be --
25-- covered  by the  GNU  General  Public  License.  This exception does not --
26-- however invalidate  any other reasons why  the executable file  might be --
27-- covered by the  GNU Public License.                                      --
28--                                                                          --
29-- GNAT was originally developed  by the GNAT team at  New York University. --
30-- Extensive contributions were provided by Ada Core Technologies Inc.      --
31--                                                                          --
32------------------------------------------------------------------------------
33
34--  This package contains functions for runtime comparisons on arrays whose
35--  elements are 16-bit discrete type values to be treated as unsigned.
36
37package System.Compare_Array_Unsigned_16 is
38
39   --  Note: although the functions in this package are in a sense Pure, the
40   --  package cannot be declared as Pure, since the arguments are addresses,
41   --  not the data, and the result is not pure wrt the address values.
42
43   function Compare_Array_U16
44     (Left      : System.Address;
45      Right     : System.Address;
46      Left_Len  : Natural;
47      Right_Len : Natural)
48      return      Integer;
49   --  Compare the array starting at address Left of length Left_Len
50   --  with the array starting at address Right of length Right_Len.
51   --  The comparison is in the normal Ada semantic sense of array
52   --  comparison. The result is -1,0,+1 for Left<Right, Left=Right,
53   --  Left>Right respectively. This function works with 4 byte words
54   --  if the operands are aligned on 4-byte boundaries and long enough.
55
56end System.Compare_Array_Unsigned_16;
57