Robert Zubeck
59086147e6
them to a single number becomes inconvenient for values larger than an single int, and tricky when the value is negative (i.e. in two's complement split into two words, with sign bit only in the high int). Instead of splitting a long into two ints, we store it internally as a byte array that corresponds exactly to Java's serialized version (sequence of eight bytes, high byte first), and we provide accessors to convert to and from Actionscript numbers. This makes Java Long values readable in Actionscript, and vice versa. Unfortunately, Actionscript does not have a native 64-bit integer - the closest equivalent is the Number class. Since this is a double float with a 52-bit mantissa, very large long values will suffer precision loss during conversion. git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@4811 542714f4-19e9-0310-aa3c-eee0fc999fb1
60 lines
1.8 KiB
ActionScript
60 lines
1.8 KiB
ActionScript
//
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// $Id$
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//
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// Narya library - tools for developing networked games
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// Copyright (C) 2002-2007 Three Rings Design, Inc., All Rights Reserved
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// http://www.threerings.net/code/narya/
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//
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// This library is free software; you can redistribute it and/or modify it
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// under the terms of the GNU Lesser General Public License as published
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// by the Free Software Foundation; either version 2.1 of the License, or
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// (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package com.threerings.io.streamers {
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import com.threerings.util.Long;
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import com.threerings.io.ObjectInputStream;
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import com.threerings.io.ObjectOutputStream;
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import com.threerings.io.Streamer;
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/**
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* A Streamer for Long objects.
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*/
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public class LongStreamer extends Streamer
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{
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public function LongStreamer ()
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{
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super(Long, "java.lang.Long");
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}
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override public function createObject (ins :ObjectInputStream) :Object
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{
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return new Long();
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}
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override public function writeObject (obj :Object, out :ObjectOutputStream)
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:void
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{
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var longy :Long = (obj as Long);
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out.writeBytes(longy.bytes, 0, longy.bytes.length);
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}
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override public function readObject (obj :Object, ins :ObjectInputStream)
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:void
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{
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var longy :Long = (obj as Long);
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ins.readBytes(longy.bytes, 0, longy.bytes.length);
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}
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}
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}
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