| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- |
| -- -- |
| -- S Y S T E M . S T R I N G _ O P S -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 1992-2021, 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 3, 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. -- |
| -- -- |
| -- As a special exception under Section 7 of GPL version 3, you are granted -- |
| -- additional permissions described in the GCC Runtime Library Exception, -- |
| -- version 3.1, as published by the Free Software Foundation. -- |
| -- -- |
| -- You should have received a copy of the GNU General Public License and -- |
| -- a copy of the GCC Runtime Library Exception along with this program; -- |
| -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- |
| -- <http://www.gnu.org/licenses/>. -- |
| -- -- |
| -- GNAT was originally developed by the GNAT team at New York University. -- |
| -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- NOTE: This package is obsolescent. It is no longer used by the compiler |
| -- which now generates concatenation inline. It is retained only because |
| -- it may be used during bootstrapping using old versions of the compiler. |
| |
| pragma Compiler_Unit_Warning; |
| |
| package body System.String_Ops is |
| |
| ---------------- |
| -- Str_Concat -- |
| ---------------- |
| |
| function Str_Concat (X, Y : String) return String is |
| begin |
| if X'Length = 0 then |
| return Y; |
| |
| else |
| declare |
| L : constant Natural := X'Length + Y'Length; |
| R : String (X'First .. X'First + L - 1); |
| |
| begin |
| R (X'Range) := X; |
| R (X'First + X'Length .. R'Last) := Y; |
| return R; |
| end; |
| end if; |
| end Str_Concat; |
| |
| ------------------- |
| -- Str_Concat_CC -- |
| ------------------- |
| |
| function Str_Concat_CC (X, Y : Character) return String is |
| R : String (1 .. 2); |
| |
| begin |
| R (1) := X; |
| R (2) := Y; |
| return R; |
| end Str_Concat_CC; |
| |
| ------------------- |
| -- Str_Concat_CS -- |
| ------------------- |
| |
| function Str_Concat_CS (X : Character; Y : String) return String is |
| R : String (1 .. Y'Length + 1); |
| |
| begin |
| R (1) := X; |
| R (2 .. R'Last) := Y; |
| return R; |
| end Str_Concat_CS; |
| |
| ------------------- |
| -- Str_Concat_SC -- |
| ------------------- |
| |
| function Str_Concat_SC (X : String; Y : Character) return String is |
| begin |
| if X'Length = 0 then |
| return (1 => Y); |
| |
| else |
| declare |
| R : String (X'First .. X'Last + 1); |
| |
| begin |
| R (X'Range) := X; |
| R (R'Last) := Y; |
| return R; |
| end; |
| end if; |
| end Str_Concat_SC; |
| |
| end System.String_Ops; |
