1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
5 -- S Y S T E M . S T R I N G _ O P S _ C O N C A T _ 3 --
11 -- Copyright (C) 1992-1998, Free Software Foundation, Inc. --
13 -- GNAT is free software; you can redistribute it and/or modify it under --
14 -- terms of the GNU General Public License as published by the Free Soft- --
15 -- ware Foundation; either version 2, or (at your option) any later ver- --
16 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
17 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
18 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
19 -- for more details. You should have received a copy of the GNU General --
20 -- Public License distributed with GNAT; see file COPYING. If not, write --
21 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
22 -- MA 02111-1307, USA. --
24 -- As a special exception, if other files instantiate generics from this --
25 -- unit, or you link this unit with other files to produce an executable, --
26 -- this unit does not by itself cause the resulting executable to be --
27 -- covered by the GNU General Public License. This exception does not --
28 -- however invalidate any other reasons why the executable file might be --
29 -- covered by the GNU Public License. --
31 -- GNAT was originally developed by the GNAT team at New York University. --
32 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
34 ------------------------------------------------------------------------------
36 package body System.String_Ops_Concat_3 is
42 function Str_Concat_3 (S1, S2, S3 : String) return String is
44 if S1'Length <= 0 then
49 L12 : constant Natural := S1'Length + S2'Length;
50 L13 : constant Natural := L12 + S3'Length;
51 R : String (S1'First .. S1'First + L13 - 1);
54 R (S1'First .. S1'Last) := S1;
55 R (S1'Last + 1 .. S1'First + L12 - 1) := S2;
56 R (S1'First + L12 .. R'Last) := S3;
62 end System.String_Ops_Concat_3;