| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNU ADA RUNTIME LIBRARY (GNARL) COMPONENTS -- |
| -- -- |
| -- S Y S T E M . S T R I N G _ O P S -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- $Revision: 1.8 $ -- |
| -- -- |
| -- 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. -- |
| -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| 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; |
| |
| --------------- |
| -- Str_Equal -- |
| --------------- |
| |
| function Str_Equal (A, B : String) return Boolean is |
| begin |
| if A'Length /= B'Length then |
| return False; |
| |
| else |
| for J in A'Range loop |
| if A (J) /= B (J + (B'First - A'First)) then |
| return False; |
| end if; |
| end loop; |
| |
| return True; |
| end if; |
| end Str_Equal; |
| |
| ------------------- |
| -- Str_Normalize -- |
| ------------------- |
| |
| procedure Str_Normalize (A : in out String) is |
| begin |
| for J in A'Range loop |
| A (J) := Character'Last; |
| end loop; |
| end Str_Normalize; |
| |
| ------------------------ |
| -- Wide_Str_Normalize -- |
| ------------------------ |
| |
| procedure Wide_Str_Normalize (A : in out Wide_String) is |
| begin |
| for J in A'Range loop |
| A (J) := Wide_Character'Last; |
| end loop; |
| end Wide_Str_Normalize; |
| |
| end System.String_Ops; |
