79 lines
2.0 KiB
Plaintext
79 lines
2.0 KiB
Plaintext
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(*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* http://www.opensource.org/licenses/cddl1.php.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* http://www.opensource.org/licenses/cddl1.php. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying * information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Portions Copyright 2007 Andreas Schneider
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*)
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unit UPacket;
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interface
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uses
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Classes, UEnhancedMemoryStream;
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type
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TPacket = class(TObject)
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constructor Create(APacketID: Byte; ALength: Cardinal);
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destructor Destroy; override;
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protected
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FStream: TEnhancedMemoryStream;
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FPacketID: Byte;
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FLength: Cardinal;
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function GetStream: TEnhancedMemoryStream;
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published
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property Stream: TEnhancedMemoryStream read GetStream;
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property PacketID: Byte read FPacketID;
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property PacketLength: Cardinal read FLength;
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end;
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implementation
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constructor TPacket.Create(APacketID: Byte; ALength: Cardinal);
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begin
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FStream := TEnhancedMemoryStream.Create;
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FPacketID := APacketID;
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FLength := ALength;
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FStream.WriteByte(FPacketID);
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if FLength = 0 then
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FStream.WriteCardinal(0);
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end;
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destructor TPacket.Destroy;
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begin
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FStream.Free;
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inherited;
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end;
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function TPacket.GetStream: TEnhancedMemoryStream;
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begin
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if FLength = 0 then
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begin
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FStream.Position := 1;
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FStream.WriteCardinal(FStream.Size);
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end;
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FStream.Position := 0;
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Result := FStream;
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end;
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end.
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