Delphi | Function Reverse(X : String):S - KKR_WE_RULE - m546bacd1

Function Reverse(X : String):String;
Var
 len, i : Integer;
 rev : String;
Begin
  len := length(x);
  if len > 0 then
  Begin
    for i := len downto 1 do
    Begin
      rev := rev + x[i];
    end;
    result := rev;
  end
  else
  Begin
    exit;
  end;
End;

function GetCurrentComputerName: string;
const
  cnMaxUserNameLen = 254;
var
  sUserName     : string;
  dwUserNameLen : dword;
begin
  dwUserNameLen := cnMaxUserNameLen-1;
  SetLength(sUserName, cnMaxUserNameLen);
  GetComputerName(PChar(sUserName), dwUserNameLen);
  SetLength(sUserName, dwUserNameLen);
  Result := sUserName;
End;

procedure TForm1.Edit1Change(Sender: TObject);
Var
 name,serial,pc, Final : String;
 i,nlen,plen,a,b,c,d,e,f,g ,nlength: Integer;
begin
  Name := edit1.Text;
  nlen := Length(name);
  pc   := GetCurrentComputerName;
  plen := length(pc);
  pc   := Reverse(pc);

  if nlen > 4 then
  Begin
  if (nlen < plen) then
  Begin
    pc := pc;
  end
  else
  Begin
  repeat
    pc := pc + pc;
  until
  length(pc) >= nlen;
  end;


  a := 0; b := 0; c := 0; d := 0; e := 0; f := 0; g := 0;

  for i := 1 to nlen do
  Begin
    a := ord(name[i]);
    b := a;
    c := a + b;
    d := a + c;
    e := d shl 2;
    e := e shr 1;
    e := e shr 1;
    e := e shr 1;
    f := f + e;
    g := ord(pc[i]);
    f := g + f;
  end;
  edit2.Text := IntToSTr(f);
  end
  else
  Begin
    edit2.Text := 'Need more chars ..';
    exit;
  end;
end;