Dave Hoover
3a25e8a3b9
git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@6214 542714f4-19e9-0310-aa3c-eee0fc999fb1
74 lines
2.1 KiB
ActionScript
74 lines
2.1 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) 2002-2010 Three Rings Design, Inc., All Rights Reserved
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// http://code.google.com/p/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 {
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import flash.utils.ByteArray;
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public class ArrayMask
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{
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public function ArrayMask (length :int = 0)
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{
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var mlength :int = int(length / 8);
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if (length % 8 != 0) {
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mlength++;
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}
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_mask.length = mlength;
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}
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/**
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* Set the specified index as containing a non-null element in the
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* array we're representing.
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*/
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public function setBit (index :int) :void
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{
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_mask[int(index/8)] |= (1 << (index % 8));
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}
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/**
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* Is the specified array element non-null?
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*/
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public function isSet (index :int) :Boolean
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{
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return (_mask[int(index/8)] & (1 << (index % 8))) != 0;
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}
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public function writeTo (out :ObjectOutputStream) :void
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{
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out.writeShort(_mask.length);
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out.writeBytes(_mask);
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}
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// documentation inherited from interface Streamable
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public function readFrom (ins :ObjectInputStream) :void
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{
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var len :int = ins.readShort();
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_mask.length = len;
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if (len > 0) {
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ins.readBytes(_mask, 0, len);
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}
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}
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/** The array mask. */
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protected var _mask :ByteArray = new ByteArray();
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}
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}
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