File : s-strops.adb
------------------------------------------------------------------------------
-- --
-- GNU ADA RUNTIME LIBRARY (GNARL) COMPONENTS --
-- --
5 -- S Y S T E M . S T R I N G _ O P S --
-- --
-- B o d y --
-- --
-- $Revision: 1.8 $ --
10 -- --
-- 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- --
15 -- 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 --
20 -- 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 --
25 -- 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. --
30 -- --
-- 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). --
-- --
------------------------------------------------------------------------------
35
package body System.String_Ops is
----------------
-- Str_Concat --
40 ----------------
function Str_Concat (X, Y : String) return String is
begin
if X'Length <= 0 then
45 return Y;
else
declare
L : constant Natural := X'Length + Y'Length;
50 R : String (X'First .. X'First + L - 1);
begin
R (X'Range) := X;
R (X'First + X'Length .. R'Last) := Y;
55 return R;
end;
end if;
end Str_Concat;
60 -------------------
-- Str_Concat_CC --
-------------------
function Str_Concat_CC (X, Y : Character) return String is
65 R : String (1 .. 2);
begin
R (1) := X;
R (2) := Y;
70 return R;
end Str_Concat_CC;
-------------------
-- Str_Concat_CS --
75 -------------------
function Str_Concat_CS (X : Character; Y : String) return String is
R : String (1 .. Y'Length + 1);
80 begin
R (1) := X;
R (2 .. R'Last) := Y;
return R;
end Str_Concat_CS;
85
-------------------
-- Str_Concat_SC --
-------------------
90 function Str_Concat_SC (X : String; Y : Character) return String is
begin
if X'Length <= 0 then
return (1 => Y);
95 else
declare
R : String (X'First .. X'Last + 1);
begin
100 R (X'Range) := X;
R (R'Last) := Y;
return R;
end;
end if;
105 end Str_Concat_SC;
---------------
-- Str_Equal --
---------------
110
function Str_Equal (A, B : String) return Boolean is
begin
if A'Length /= B'Length then
return False;
115
else
for J in A'Range loop
if A (J) /= B (J + (B'First - A'First)) then
return False;
120 end if;
end loop;
return True;
end if;
125 end Str_Equal;
-------------------
-- Str_Normalize --
-------------------
130
procedure Str_Normalize (A : in out String) is
begin
for J in A'Range loop
A (J) := Character'Last;
135 end loop;
end Str_Normalize;
------------------------
-- Wide_Str_Normalize --
140 ------------------------
procedure Wide_Str_Normalize (A : in out Wide_String) is
begin
for J in A'Range loop
145 A (J) := Wide_Character'Last;
end loop;
end Wide_Str_Normalize;
end System.String_Ops;