| 1 |
706 |
jeremybenn |
------------------------------------------------------------------------------
|
| 2 |
|
|
-- --
|
| 3 |
|
|
-- GNAT RUN-TIME 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 _ 8 --
|
| 6 |
|
|
-- --
|
| 7 |
|
|
-- S p e c --
|
| 8 |
|
|
-- --
|
| 9 |
|
|
-- Copyright (C) 2002-2009, 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 3, 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. --
|
| 17 |
|
|
-- --
|
| 18 |
|
|
-- As a special exception under Section 7 of GPL version 3, you are granted --
|
| 19 |
|
|
-- additional permissions described in the GCC Runtime Library Exception, --
|
| 20 |
|
|
-- version 3.1, as published by the Free Software Foundation. --
|
| 21 |
|
|
-- --
|
| 22 |
|
|
-- You should have received a copy of the GNU General Public License and --
|
| 23 |
|
|
-- a copy of the GCC Runtime Library Exception along with this program; --
|
| 24 |
|
|
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
|
| 25 |
|
|
-- <http://www.gnu.org/licenses/>. --
|
| 26 |
|
|
-- --
|
| 27 |
|
|
-- GNAT was originally developed by the GNAT team at New York University. --
|
| 28 |
|
|
-- Extensive contributions were provided by Ada Core Technologies Inc. --
|
| 29 |
|
|
-- --
|
| 30 |
|
|
------------------------------------------------------------------------------
|
| 31 |
|
|
|
| 32 |
|
|
-- This package contains functions for runtime comparisons on arrays whose
|
| 33 |
|
|
-- elements are 8-bit discrete type values to be treated as unsigned.
|
| 34 |
|
|
|
| 35 |
|
|
pragma Compiler_Unit;
|
| 36 |
|
|
|
| 37 |
|
|
package System.Compare_Array_Unsigned_8 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_U8
|
| 44 |
|
|
(Left : System.Address;
|
| 45 |
|
|
Right : System.Address;
|
| 46 |
|
|
Left_Len : Natural;
|
| 47 |
|
|
Right_Len : Natural) return Integer;
|
| 48 |
|
|
-- Compare the array starting at address Left of length Left_Len with the
|
| 49 |
|
|
-- array starting at address Right of length Right_Len. The comparison is
|
| 50 |
|
|
-- in the normal Ada semantic sense of array comparison. The result is -1,
|
| 51 |
|
|
-- 0, +1 for Left < Right, Left = Right, Left > Right respectively. This
|
| 52 |
|
|
-- function works with 4 byte words if the operands are aligned on 4-byte
|
| 53 |
|
|
-- boundaries and long enough.
|
| 54 |
|
|
|
| 55 |
|
|
function Compare_Array_U8_Unaligned
|
| 56 |
|
|
(Left : System.Address;
|
| 57 |
|
|
Right : System.Address;
|
| 58 |
|
|
Left_Len : Natural;
|
| 59 |
|
|
Right_Len : Natural) return Integer;
|
| 60 |
|
|
-- Same functionality as Compare_Array_U8 but always proceeds by bytes.
|
| 61 |
|
|
-- Used when the caller knows that the operands are unaligned, or short
|
| 62 |
|
|
-- enough that it makes no sense to go by words.
|
| 63 |
|
|
|
| 64 |
|
|
end System.Compare_Array_Unsigned_8;
|
