| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNU ADA RUNTIME 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 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 8-bit discrete type values to be treated as unsigned. |
| |
| 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; |