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jeremybenn |
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME LIBRARY COMPONENTS --
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-- --
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-- 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 --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 2002-2009, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This package contains functions for runtime comparisons on arrays whose
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-- elements are 8-bit discrete type values to be treated as unsigned.
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pragma Compiler_Unit;
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package System.Compare_Array_Unsigned_8 is
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-- Note: although the functions in this package are in a sense Pure, the
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-- package cannot be declared as Pure, since the arguments are addresses,
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-- not the data, and the result is not pure wrt the address values.
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function Compare_Array_U8
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(Left : System.Address;
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Right : System.Address;
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Left_Len : Natural;
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Right_Len : Natural) return Integer;
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-- Compare the array starting at address Left of length Left_Len with the
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-- array starting at address Right of length Right_Len. The comparison is
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-- in the normal Ada semantic sense of array comparison. The result is -1,
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-- 0, +1 for Left < Right, Left = Right, Left > Right respectively. This
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-- function works with 4 byte words if the operands are aligned on 4-byte
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-- boundaries and long enough.
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function Compare_Array_U8_Unaligned
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(Left : System.Address;
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Right : System.Address;
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Left_Len : Natural;
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Right_Len : Natural) return Integer;
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-- Same functionality as Compare_Array_U8 but always proceeds by bytes.
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-- Used when the caller knows that the operands are unaligned, or short
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-- enough that it makes no sense to go by words.
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end System.Compare_Array_Unsigned_8;
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