Delphi Replace,InStr,Left,Right,LeftTrim,RightTrim,Reverse,Split,Replace,Mid Functions

https://www.planet-source-code.com/vb/scripts/ShowCode.asp?txtCodeId=382&lngWId=7

!**************************************
! Name: Replace,InStr,Left,Right,LeftTrim,RightTrim,Reverse,Split,Replace,Mid Functions
! Description:This is just like the name says, The Following Vb functions for Delphi all coded/translated by me:
RightTrim
LeftTrem
InStr
Mid
Left
Right
Replace
Split
Reverse
! By: telle (from psc cd)
!**************************************

unit Functions;
interface
uses
 Windows,Messages, SysUtils, Classes, Graphics,StdCtrls;
function RightTrim(const s:String):String;
function LeftTrim(const s:String):String;
function InStr(Start: integer; Source: string; SourceToFind: string): integer;
function Mid(Source: string; Start: integer; Length: integer): string;
function Left(Source: string; Length: integer): string;
function Right(Source: string; Lengths: integer): string;
function Replace(sData: String; sSubstring: String; sNewsubstring: string): String;
function Split(Source, Deli: string; StringList: TStringList): TStringList;
function Reverse(Line: string): string;
implementation
function Reverse(Line: string): string;
 var i: integer;
 var a: string;
begin
 For i := 1 To Length(Line) do
 begin
 a := Right(Line, i);
 Result := Result + Left(a, 1);
 end;
end;
function Split(Source, Deli: string; StringList: TStringList): TStringList;
var
 EndOfCurrentString: byte;
begin
 repeat
EndOfCurrentString := Pos(Deli, Source);
if EndOfCurrentString = 0 then
 StringList.add(Source)
else
 StringList.add(Copy(Source, 1, EndOfCurrentString - 1));
Source := Copy(Source, EndOfCurrentString + length(Deli), length(Source) - EndOfCurrentString);
 until EndOfCurrentString = 0;
 result := StringList;
end;
function Replace(sData: String; sSubstring: String; sNewsubstring: string): String;
var
i: integer;
lSub: Longint;
lData: Longint;
begin
i := 1;
lSub := Length(sSubstring);
lData := Length(sData);
repeat
begin
i := InStr(i, sData, sSubstring);
If i = 0 Then
begin
sNewSubString := sData;
Exit
end
Else
sData := Copy(sData, 1, i - 1) + sNewsubstring + Copy(sData, i + lSub, lData);
i := i + lSub;
End;
 Until i > lData;
Replace := sData;
end;
function Left(Source: string; Length: integer): string;
begin
 Result := copy(Source,1,Length);
end;
function Right(Source: string; Lengths: integer): string;
begin
Result := copy(source,Length(Source) - Lengths,Lengths);
end;
function Mid(Source: string; Start: integer; Length: integer): string;
begin
 Result := copy(Source,Start,Length);
end;
function InStr(Start: integer; Source: string; SourceToFind: string): integer;
begin
 Result := pos(SourceToFind,copy(Source,Start,Length(Source) - (Start - 1)));
end;
function RightTrim(const s:String):String;
var
i:integer;
begin
 i:=length(s);
 while (i>0) and (s[i]<=#32) do
Dec(i);
 result:=Copy(s,1,i);
end;
function LeftTrim(const s:String):String;
var
i, L:integer;
begin
 L:=length(s);
 i:=1;
 while (i<=L) and (s[i]<=#32) do
Inc(i);
 result:=Copy(s,i, MaxInt);
end;
end.