diff --git a/components/rx/trunk/rxtools/rxutils.pas b/components/rx/trunk/rxtools/rxutils.pas
new file mode 100644
index 000000000..2c3cedfa1
--- /dev/null
+++ b/components/rx/trunk/rxtools/rxutils.pas
@@ -0,0 +1,120 @@
+{ RxStrUtils unit
+
+  Copyright (C) 2005-2017 Lagunov Aleksey alexs@yandex.ru and Lazarus team
+  original conception from rx library for Delphi (c)
+
+  This library is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Library General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or (at your
+  option) any later version with the following modification:
+
+  As a special exception, the copyright holders of this library give you
+  permission to link this library with independent modules to produce an
+  executable, regardless of the license terms of these independent modules,and
+  to copy and distribute the resulting executable under terms of your choice,
+  provided that you also meet, for each linked independent module, the terms
+  and conditions of the license of that module. An independent module is a
+  module which is not derived from or based on this library. If you modify
+  this library, you may extend this exception to your version of the library,
+  but you are not obligated to do so. If you do not wish to do so, delete this
+  exception statement from your version.
+
+  This program is distributed in the hope that it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
+  for more details.
+
+  You should have received a copy of the GNU Library General Public License
+  along with this library; if not, write to the Free Software Foundation,
+  Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+}
+
+unit rxutils;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  Classes, SysUtils;
+
+procedure SwapValues (var X, Y : Byte); inline; overload;
+procedure SwapValues (var X, Y : Word); inline; overload;
+procedure SwapValues (var X, Y : Integer); inline; overload;
+//procedure SwapValues (var X, Y : Longint); inline; overload;
+procedure SwapValues (var X, Y : Cardinal); inline; overload;
+procedure SwapValues (var X, Y : QWord); inline; overload;
+procedure SwapValues (var X, Y : Int64); inline; overload;
+{procedure Swap (X : Integer) : Integer;{$ifdef SYSTEMINLINE}inline;{$endif}[internconst:fpc_in_const_swap_word];
+function swap (X : Longint) : Longint;{$ifdef SYSTEMINLINE}inline;{$endif}[internconst:fpc_in_const_swap_long];
+function Swap (X : Cardinal) : Cardinal;{$ifdef SYSTEMINLINE}inline;{$endif}[internconst:fpc_in_const_swap_long];
+function Swap (X : QWord) : QWord;{$ifdef SYSTEMINLINE}inline;{$endif}[internconst:fpc_in_const_swap_qword];
+function swap (X : Int64) : Int64;{$ifdef SYSTEMINLINE}inline;{$endif}[internconst:fpc_in_const_swap_qword];
+}
+implementation
+
+procedure SwapValues(var X, Y: Byte);
+var
+  T: Byte;
+begin
+  T:=X;
+  X:=Y;
+  Y:=T;
+end;
+
+procedure SwapValues(var X, Y: Word);
+var
+  T: Word;
+begin
+  T:=X;
+  X:=Y;
+  Y:=T;
+end;
+
+procedure SwapValues(var X, Y: Integer);
+var
+  T: Integer;
+begin
+  T:=X;
+  X:=Y;
+  Y:=T;
+end;
+{
+procedure SwapValues(var X, Y: Longint);
+var
+  T: LongInt;
+begin
+  T:=X;
+  X:=Y;
+  Y:=T;
+end;
+}
+procedure SwapValues(var X, Y: Cardinal);
+var
+  T: Cardinal;
+begin
+  T:=X;
+  X:=Y;
+  Y:=T;
+end;
+
+procedure SwapValues(var X, Y: QWord);
+var
+  T: QWord;
+begin
+  T:=X;
+  X:=Y;
+  Y:=T;
+end;
+
+procedure SwapValues(var X, Y: Int64);
+var
+  T: Int64;
+begin
+  T:=X;
+  X:=Y;
+  Y:=T;
+end;
+
+end.
+