1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME LIBRARY COMPONENTS --
5 -- S Y S T E M . S T R I N G _ C O M P A R E --
9 -- Copyright (C) 2002-2013, Free Software Foundation, Inc. --
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. --
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. --
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/>. --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
30 ------------------------------------------------------------------------------
32 -- This package contains functions for runtime comparisons on strings
34 pragma Compiler_Unit_Warning;
36 package System.String_Compare is
39 (Left : System.Address;
40 Right : System.Address;
42 Right_Len : Natural) return Integer;
43 -- Compare the string starting at address Left of length Left_Len
44 -- with the string starting at address Right of length Right_Len.
45 -- The comparison is in the normal Ada semantic sense of string
46 -- comparison. The result is -1,0,+1 for Left<Right, Left=Right,
47 -- Left>Right respectively. This function works with 4 byte words
48 -- if the operands are aligned on 4-byte boundaries and long enough.
50 function Str_Compare_Bytes
51 (Left : System.Address;
52 Right : System.Address;
54 Right_Len : Natural) return Integer;
55 -- Same functionality as Str_Compare but always proceeds by bytes.
56 -- Used when the caller knows that the operands are unaligned, or
57 -- short enough that it makes no sense to go by words.
59 end System.String_Compare;