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) 2002-2005 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 2, 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. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 -- This package contains functions for runtime comparisons on strings
36 package System
.String_Compare
is
39 (Left
: System
.Address
;
40 Right
: System
.Address
;
44 -- Compare the string starting at address Left of length Left_Len
45 -- with the string starting at address Right of length Right_Len.
46 -- The comparison is in the normal Ada semantic sense of string
47 -- comparison. The result is -1,0,+1 for Left<Right, Left=Right,
48 -- Left>Right respectively. This function works with 4 byte words
49 -- if the operands are aligned on 4-byte boundaries and long enough.
51 function Str_Compare_Bytes
52 (Left
: System
.Address
;
53 Right
: System
.Address
;
57 -- Same functionality as Str_Compare but always proceeds by bytes.
58 -- Used when the caller knows that the operands are unaligned, or
59 -- short enough that it makes no sense to go by words.
61 end System
.String_Compare
;