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------------------------------------------------------------------------------
--                                                                          --
--                    GNAT RUN-TIME LIBRARY COMPONENTS                      --
--                                                                          --
--                S Y S T E M . S T R I N G _ C O M P A R E                 --
--                                                                          --
--                                 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 strings
 
pragma Compiler_Unit;
 
package System.String_Compare is
 
   function Str_Compare
     (Left      : System.Address;
      Right     : System.Address;
      Left_Len  : Natural;
      Right_Len : Natural) return Integer;
   --  Compare the string starting at address Left of length Left_Len
   --  with the string starting at address Right of length Right_Len.
   --  The comparison is in the normal Ada semantic sense of string
   --  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 Str_Compare_Bytes
     (Left      : System.Address;
      Right     : System.Address;
      Left_Len  : Natural;
      Right_Len : Natural) return Integer;
   --  Same functionality as Str_Compare 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.String_Compare;
 

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