blob: e395c378b49521265be48d12b65e366cb6323903 [file] [log] [blame]
-- --
-- --
-- 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 --
-- --
-- S p e c --
-- --
-- Copyright (C) 2002 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 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 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 16-bit discrete type values to be treated as unsigned.
package System.Compare_Array_Unsigned_16 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_U16
(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.
end System.Compare_Array_Unsigned_16;