SystemMove (Delphi)

Description

This example moves characters from a Char array into an integer. Displaying the integer as a hex, you can see that 'W' (0x57) is stored in the least significant byte of the integer.

Code

var
  A: array[1..4] of Char;
  B: Integer;

procedure DisplayAB;
begin
  Form1.ListBox1.Items[0] := A[1];
  Form1.ListBox1.Items[1] := A[2];
  Form1.ListBox1.Items[2] := A[3];
  Form1.ListBox1.Items[3] := A[4];
  Form1.Edit1.Text := IntToHex(B, 1);
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  Move(A, B, SizeOf(B));  { SizeOf = safety! }
  DisplayAB;
end;

procedure TForm1.FormCreate(Sender: TObject);
var
  I : Integer;
begin
  A[1] := 'W';
  A[2] := 'H';
  A[3] := 'A';
  A[4] := 'T';
  B := 5;
  DisplayAB;
end;

Note: This method has an untyped parameter, which can lead to memory corruption. To avoid this problem, use SizeOf for the last parameter of the method.

Uses

• System.Move ( fr | de | ja )
• System.SizeOf