1------------------------------------------------------------------------------
2--                                                                          --
3--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
4--                                                                          --
5--                      S Y S T E M . C O N C A T _ 4                       --
6--                                                                          --
7--                                 S p e c                                  --
8--                                                                          --
9--            Copyright (C) 2008-2019, Free Software Foundation, Inc.       --
10--                                                                          --
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.                                     --
17--                                                                          --
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.               --
21--                                                                          --
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/>.                                          --
26--                                                                          --
27-- GNAT was originally developed  by the GNAT team at  New York University. --
28-- Extensive contributions were provided by Ada Core Technologies Inc.      --
29--                                                                          --
30------------------------------------------------------------------------------
31
32--  This package contains a procedure for runtime concatenation of four string
33--  operands. It is used when we want to save space in the generated code.
34
35pragma Compiler_Unit_Warning;
36
37package System.Concat_4 is
38
39   procedure Str_Concat_4 (R : out String; S1, S2, S3, S4 : String);
40   --  Performs the operation R := S1 & S2 & S3 & S4. The bounds
41   --  of R are known to be correct (usually set by a call to the
42   --  Str_Concat_Bounds_5 procedure below), so no bounds checks are required,
43   --  and it is known that none of the input operands overlaps R. No
44   --  assumptions can be made about the lower bounds of any of the operands.
45
46   procedure Str_Concat_Bounds_4
47     (Lo, Hi         : out Natural;
48      S1, S2, S3, S4 : String);
49   --  Assigns to Lo..Hi the bounds of the result of concatenating the four
50   --  given strings, following the rules in the RM regarding null operands.
51
52end System.Concat_4;
53