System.Move Function

Copies bytes from a source to a destination.

Pascal

procedure Move(const Source; var Dest; Count: Integer);

C++

Move(const  Source,  Dest, int Count);

File

System

Description

Move copies Count bytes from Source to Dest. No range checking is performed. Move compensates for overlaps between the source and destination blocks.

Whenever possible, use the global SizeOf function (Delphi) or the sizeof operator (C++) to determine the count.

Delphi Examples:

Copy Code

{
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.
}
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;

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