| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME COMPONENTS -- |
| -- -- |
| -- S Y S T E M . S T R I N G _ O P S _ C O N C A T _ 4 -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 1992-1998, 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 2, 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. See the GNU General Public License -- |
| -- for more details. You should have received a copy of the GNU General -- |
| -- Public License distributed with GNAT; see file COPYING. If not, write -- |
| -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- |
| -- MA 02111-1307, USA. -- |
| -- -- |
| -- As a special exception, if other files instantiate generics from this -- |
| -- unit, or you link this unit with other files to produce an executable, -- |
| -- this unit does not by itself cause the resulting executable to be -- |
| -- covered by the GNU General Public License. This exception does not -- |
| -- however invalidate any other reasons why the executable file might be -- |
| -- covered by the GNU Public License. -- |
| -- -- |
| -- GNAT was originally developed by the GNAT team at New York University. -- |
| -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| package body System.String_Ops_Concat_4 is |
| |
| ------------------ |
| -- Str_Concat_4 -- |
| ------------------ |
| |
| function Str_Concat_4 (S1, S2, S3, S4 : String) return String is |
| begin |
| if S1'Length <= 0 then |
| return S2 & S3 & S4; |
| |
| else |
| declare |
| L12 : constant Natural := S1'Length + S2'Length; |
| L13 : constant Natural := L12 + S3'Length; |
| L14 : constant Natural := L13 + S4'Length; |
| R : String (S1'First .. S1'First + L14 - 1); |
| |
| begin |
| R (S1'First .. S1'Last) := S1; |
| R (S1'Last + 1 .. S1'First + L12 - 1) := S2; |
| R (S1'First + L12 .. S1'First + L13 - 1) := S3; |
| R (S1'First + L13 .. R'Last) := S4; |
| return R; |
| end; |
| end if; |
| end Str_Concat_4; |
| |
| end System.String_Ops_Concat_4; |
