RIGHT$, LEFT$, MID$, SPLIT, TRIM$,... EN DELPHI

unit FctsStr;

    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+1,Lengths+1);
    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.