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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME LIBRARY COMPONENTS --
-- --
-- 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 _ 8 --
-- --
-- S p e c --
-- --
-- Copyright (C) 2002-2009, Free Software Foundation, 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 3, 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. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- This package contains functions for runtime comparisons on arrays whose
-- elements are 8-bit discrete type values to be treated as unsigned.
pragma Warnings (Off);
pragma Compiler_Unit;
pragma Warnings (On);
package System.Compare_Array_Unsigned_8 is
-- Note: although the functions in this package are in a sense Pure, the
-- package cannot be declared as Pure, since the arguments are addresses,
-- not the data, and the result is not pure wrt the address values.
function Compare_Array_U8
(Left : System.Address;
Right : System.Address;
Left_Len : Natural;
Right_Len : Natural) return Integer;
-- Compare the array starting at address Left of length Left_Len with the
-- array starting at address Right of length Right_Len. The comparison is
-- in the normal Ada semantic sense of array comparison. The result is -1,
-- 0, +1 for Left < Right, Left = Right, Left > Right respectively. This
-- function works with 4 byte words if the operands are aligned on 4-byte
-- boundaries and long enough.
function Compare_Array_U8_Unaligned
(Left : System.Address;
Right : System.Address;
Left_Len : Natural;
Right_Len : Natural) return Integer;
-- Same functionality as Compare_Array_U8 but always proceeds by bytes.
-- Used when the caller knows that the operands are unaligned, or short
-- enough that it makes no sense to go by words.
end System.Compare_Array_Unsigned_8;
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