<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" lang="en_US" xml:lang="en_US"> <head> <title>kjs: scope_chain.h Source File (kjs)</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta http-equiv="Content-Style-Type" content="text/css" /> <meta http-equiv="pics-label" content='(pics-1.1 "http://www.icra.org/ratingsv02.html" comment "ICRAonline DE v2.0" l gen true for "http://www.kde.org" r (nz 1 vz 1 lz 1 oz 1 cb 1) "http://www.rsac.org/ratingsv01.html" l gen true for "http://www.kde.org" r (n 0 s 0 v 0 l 0))' /> <meta name="trademark" content="KDE e.V." /> <meta name="description" content="K Desktop Environment Homepage, KDE.org" /> <meta name="MSSmartTagsPreventParsing" content="true" /> <meta name="robots" content="all" /> <link rel="shortcut icon" href="../../favicon.ico" /> <link rel="stylesheet" media="screen" type="text/css" title="APIDOX" href="doxygen.css" /> </head> <body> <div id="nav_header_top" align="right"> <a href="#content" class="doNotDisplay" accesskey="2">Skip to main content ::</a> <a href="../.."><img id="nav_header_logo" alt="Home" align="left" src="../../kde_gear_64.png" border="0" /></a> <span class="doNotDisplay">::</span> <div id="nav_header_title" align="left">KDE API Reference</div> </div> <div id="nav_header_bottom" align="right"> <span class="doNotDisplay">:: <a href="#navigation" accesskey="5">Skip to Link Menu</a><br/></span> <div id="nav_header_bottom_right" style="text-align: left;"> / <a href="../..">API Reference</a> / <a href=".">kjs</a> </div> </div> <table id="main" border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td valign="top" class="menuheader" height="0"></td> <td id="contentcolumn" valign="top" rowspan="2" > <div id="content" style="padding-top: 0px;"><div style="width:100%; margin: 0px; padding: 0px;"> <a name="content"></a> <!-- Generated by Doxygen 1.7.4 --> <div class="header"> <div class="headertitle"> <div class="title">scope_chain.h</div> </div> </div> <div class="contents"> <div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span> <a name="l00002"></a>00002 <span class="comment"> * This file is part of the KDE libraries</span> <a name="l00003"></a>00003 <span class="comment"> * Copyright (C) 2003 Apple Computer, Inc.</span> <a name="l00004"></a>00004 <span class="comment"> *</span> <a name="l00005"></a>00005 <span class="comment"> * This library is free software; you can redistribute it and/or</span> <a name="l00006"></a>00006 <span class="comment"> * modify it under the terms of the GNU Library General Public</span> <a name="l00007"></a>00007 <span class="comment"> * License as published by the Free Software Foundation; either</span> <a name="l00008"></a>00008 <span class="comment"> * version 2 of the License, or (at your option) any later version.</span> <a name="l00009"></a>00009 <span class="comment"> *</span> <a name="l00010"></a>00010 <span class="comment"> * This library is distributed in the hope that it will be useful,</span> <a name="l00011"></a>00011 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span> <a name="l00012"></a>00012 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span> <a name="l00013"></a>00013 <span class="comment"> * Library General Public License for more details.</span> <a name="l00014"></a>00014 <span class="comment"> *</span> <a name="l00015"></a>00015 <span class="comment"> * You should have received a copy of the GNU Library General Public License</span> <a name="l00016"></a>00016 <span class="comment"> * along with this library; see the file COPYING.LIB. If not, write to</span> <a name="l00017"></a>00017 <span class="comment"> * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,</span> <a name="l00018"></a>00018 <span class="comment"> * Boston, MA 02110-1301, USA.</span> <a name="l00019"></a>00019 <span class="comment"> *</span> <a name="l00020"></a>00020 <span class="comment"> */</span> <a name="l00021"></a>00021 <a name="l00022"></a>00022 <span class="preprocessor">#ifndef KJS_SCOPE_CHAIN_H</span> <a name="l00023"></a>00023 <span class="preprocessor"></span><span class="preprocessor">#define KJS_SCOPE_CHAIN_H</span> <a name="l00024"></a>00024 <span class="preprocessor"></span> <a name="l00025"></a>00025 <span class="preprocessor">#include "global.h"</span> <a name="l00026"></a>00026 <a name="l00027"></a>00027 <span class="keyword">namespace </span>KJS { <a name="l00028"></a>00028 <a name="l00029"></a>00029 <span class="keyword">class </span>ObjectImp; <a name="l00030"></a>00030 <a name="l00034"></a><a class="code" href="classKJS_1_1ScopeChainNode.html">00034</a> <span class="keyword">class </span>KJS_EXPORT <a class="code" href="classKJS_1_1ScopeChainNode.html" title="A scope chain node.">ScopeChainNode</a> { <a name="l00035"></a>00035 <span class="keyword">public</span>: <a name="l00036"></a>00036 <a class="code" href="classKJS_1_1ScopeChainNode.html" title="A scope chain node.">ScopeChainNode</a>(<a class="code" href="classKJS_1_1ScopeChainNode.html" title="A scope chain node.">ScopeChainNode</a> *n, ObjectImp *o) <a name="l00037"></a>00037 : next(n), object(o), refCount(1) { } <a name="l00038"></a>00038 <a name="l00039"></a>00039 <a class="code" href="classKJS_1_1ScopeChainNode.html" title="A scope chain node.">ScopeChainNode</a> *next; <a name="l00040"></a>00040 ObjectImp *object; <a name="l00041"></a>00041 <span class="keywordtype">int</span> refCount; <a name="l00042"></a>00042 }; <a name="l00043"></a>00043 <a name="l00047"></a><a class="code" href="classKJS_1_1ScopeChain.html">00047</a> <span class="keyword">class </span>KJS_EXPORT <a class="code" href="classKJS_1_1ScopeChain.html" title="A scope chain object.">ScopeChain</a> { <a name="l00048"></a>00048 <span class="keyword">public</span>: <a name="l00049"></a>00049 <a class="code" href="classKJS_1_1ScopeChain.html" title="A scope chain object.">ScopeChain</a>() : _node(0) { } <a name="l00050"></a>00050 ~<a class="code" href="classKJS_1_1ScopeChain.html" title="A scope chain object.">ScopeChain</a>() { deref(); } <a name="l00051"></a>00051 <a name="l00052"></a>00052 <a class="code" href="classKJS_1_1ScopeChain.html" title="A scope chain object.">ScopeChain</a>(<span class="keyword">const</span> <a class="code" href="classKJS_1_1ScopeChain.html" title="A scope chain object.">ScopeChain</a> &c) : _node(c._node) <a name="l00053"></a>00053 { <span class="keywordflow">if</span> (_node) ++_node->refCount; } <a name="l00054"></a>00054 <a class="code" href="classKJS_1_1ScopeChain.html" title="A scope chain object.">ScopeChain</a> &operator=(<span class="keyword">const</span> <a class="code" href="classKJS_1_1ScopeChain.html" title="A scope chain object.">ScopeChain</a> &); <a name="l00055"></a>00055 <a name="l00056"></a>00056 <span class="keywordtype">bool</span> isEmpty()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> !_node; } <a name="l00057"></a>00057 ObjectImp *top()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _node->object; } <a name="l00058"></a>00058 ObjectImp *bottom()<span class="keyword"> const </span>{ <span class="keyword">const</span> <a class="code" href="classKJS_1_1ScopeChainNode.html" title="A scope chain node.">ScopeChainNode</a> *n = _node; <a name="l00059"></a>00059 <span class="keywordflow">while</span> (n->next) n = n->next; <a name="l00060"></a>00060 <span class="keywordflow">return</span> n->object; } <a name="l00061"></a>00061 <a name="l00062"></a>00062 <span class="keywordtype">void</span> clear() { deref(); _node = 0; } <a name="l00063"></a>00063 <span class="keywordtype">void</span> push(ObjectImp *); <a name="l00064"></a>00064 <span class="keywordtype">void</span> pop(); <a name="l00065"></a>00065 <a name="l00066"></a>00066 <span class="keywordtype">void</span> mark(); <a name="l00067"></a>00067 <a name="l00068"></a>00068 <span class="keyword">private</span>: <a name="l00069"></a>00069 <a class="code" href="classKJS_1_1ScopeChainNode.html" title="A scope chain node.">ScopeChainNode</a> *_node; <a name="l00070"></a>00070 <a name="l00071"></a>00071 <span class="keywordtype">void</span> deref() { <span class="keywordflow">if</span> (_node && --_node->refCount == 0) release(); } <a name="l00072"></a>00072 <span class="keywordtype">void</span> ref() <span class="keyword">const</span>; <a name="l00073"></a>00073 <a name="l00074"></a>00074 <span class="keywordtype">void</span> release(); <a name="l00075"></a>00075 }; <a name="l00076"></a>00076 <a name="l00077"></a>00077 } <span class="comment">// namespace KJS</span> <a name="l00078"></a>00078 <a name="l00079"></a>00079 <span class="preprocessor">#endif // KJS_SCOPE_CHAIN_H</span> </pre></div></div> </div> </div></div> </td> </tr> <tr> <td valign="top" id="leftmenu" width="25%"> <a name="navigation"></a> <div class="menu_box"><h2>kjs</h2> <div class="nav_list"> <ul><li><a href="index.html">Main Page</a></li><li><a href="hierarchy.html">Class Hierarchy</a></li><li><a href="classes.html">Alphabetical List</a></li><li><a href="annotated.html">Class List</a></li><li><a href="files.html">File List</a></li><li><a href="functions.html">Class Members</a></li><li><a href="pages.html">Related Pages</a></li></ul> <!-- <h2>Class Picker</h2> <div style="text-align: center;"> <form name="guideform"> <select name="guidelinks" style="width:100%;" onChange="window.location=document.guideform.guidelinks.options[document.guideform.guidelinks.selectedIndex].value"> <option value="annotated.html">-- Choose --</option> <option 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