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Delphi ActiveX

Receive a 16-bit Integer from a Socket

See more Socket/SSL/TLS Examples

Demonstrates Socket.ReceiveInt16, which reads exactly two bytes as a 16-bit integer and stores the result in the ReceivedInt property. Byte order and signedness are selectable.

Background. Fixed-size integers and length prefixes are common building blocks for application-defined binary protocols. Byte order is selectable, with big-endian being network byte order.

Chilkat Delphi ActiveX Downloads

Delphi ActiveX
var
success: Integer;
socket: TChilkatSocket;
bTls: Integer;
maxWaitMs: Integer;
bBigEndian: Integer;
bUnsigned: Integer;

begin
success := 0;

socket := TChilkatSocket.Create(Self);

//  Connect to the server using TLS.
bTls := 1;
maxWaitMs := 5000;
success := socket.Connect('example.com',5000,bTls,maxWaitMs);
if (success = 0) then
  begin
    Memo1.Lines.Add(socket.LastErrorText);
    Exit;
  end;

//  Read exactly two bytes as a 16-bit integer and store the result in the ReceivedInt property.
//  The 1st argument selects byte order (1 = big-endian); the 2nd selects unsigned interpretation.
bBigEndian := 1;
bUnsigned := 0;
success := socket.ReceiveInt16(bBigEndian,bUnsigned);
if (success = 0) then
  begin
    Memo1.Lines.Add(socket.LastErrorText);
    Exit;
  end;
Memo1.Lines.Add('Received 16-bit integer: ' + IntToStr(socket.ReceivedInt));