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<h1>PersistNode.cc</h1><a href="a00117.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Package : omniEvents</span>
<a name="l00002"></a>00002 <span class="comment">// PersistNode.cc Created : 2004/04/29</span>
<a name="l00003"></a>00003 <span class="comment">// Author : Alex Tingle</span>
<a name="l00004"></a>00004 <span class="comment">//</span>
<a name="l00005"></a>00005 <span class="comment">// Copyright (C) 2004 Alex Tingle.</span>
<a name="l00006"></a>00006 <span class="comment">//</span>
<a name="l00007"></a>00007 <span class="comment">// This file is part of the omniEvents application.</span>
<a name="l00008"></a>00008 <span class="comment">//</span>
<a name="l00009"></a>00009 <span class="comment">// omniEvents is free software; you can redistribute it and/or</span>
<a name="l00010"></a>00010 <span class="comment">// modify it under the terms of the GNU Lesser General Public</span>
<a name="l00011"></a>00011 <span class="comment">// License as published by the Free Software Foundation; either</span>
<a name="l00012"></a>00012 <span class="comment">// version 2.1 of the License, or (at your option) any later version.</span>
<a name="l00013"></a>00013 <span class="comment">//</span>
<a name="l00014"></a>00014 <span class="comment">// omniEvents is distributed in the hope that it will be useful,</span>
<a name="l00015"></a>00015 <span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00016"></a>00016 <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00017"></a>00017 <span class="comment">// Lesser General Public License for more details.</span>
<a name="l00018"></a>00018 <span class="comment">//</span>
<a name="l00019"></a>00019 <span class="comment">// You should have received a copy of the GNU Lesser General Public</span>
<a name="l00020"></a>00020 <span class="comment">// License along with this library; if not, write to the Free Software</span>
<a name="l00021"></a>00021 <span class="comment">// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</span>
<a name="l00022"></a>00022 <span class="comment">//</span>
<a name="l00023"></a>00023
<a name="l00024"></a>00024 <span class="preprocessor">#include "<a class="code" href="a00118.html">PersistNode.h</a>"</span>
<a name="l00025"></a>00025
<a name="l00026"></a>00026 <span class="preprocessor">#include <stdlib.h></span>
<a name="l00027"></a>00027 <span class="preprocessor">#include <stdio.h></span>
<a name="l00028"></a>00028
<a name="l00029"></a>00029 <span class="keyword">namespace </span>OmniEvents {
<a name="l00030"></a>00030
<a name="l00031"></a>00031
<a name="l00032"></a><a class="code" href="a00060.html#a1">00032</a> <a class="code" href="a00060.html#a0">PersistNode::PersistNode</a>(istream& is)
<a name="l00033"></a>00033 {
<a name="l00034"></a>00034 <span class="keywordflow">while</span>( <a class="code" href="a00060.html#a4">readnode</a>(is) ){}
<a name="l00035"></a>00035 }
<a name="l00036"></a>00036
<a name="l00037"></a><a class="code" href="a00060.html#a2">00037</a> <a class="code" href="a00060.html#a2">PersistNode::~PersistNode</a>()
<a name="l00038"></a>00038 {
<a name="l00039"></a>00039 <span class="keywordflow">for</span>(map<string,PersistNode*>::iterator i=<a class="code" href="a00060.html#o0">_child</a>.begin(); i!=<a class="code" href="a00060.html#o0">_child</a>.end(); ++i)
<a name="l00040"></a>00040 <span class="keyword">delete</span> i->second;
<a name="l00041"></a>00041 }
<a name="l00042"></a>00042
<a name="l00043"></a><a class="code" href="a00060.html#a3">00043</a> <span class="keywordtype">void</span> <a class="code" href="a00060.html#a3">PersistNode::output</a>(ostream& os,string name)<span class="keyword"> const</span>
<a name="l00044"></a>00044 <span class="keyword"></span>{
<a name="l00045"></a>00045 <span class="keywordflow">if</span>(!name.empty()) <span class="comment">// Don't output root node.</span>
<a name="l00046"></a>00046 {
<a name="l00047"></a>00047 os<<name<<<span class="charliteral">'\n'</span>;
<a name="l00048"></a>00048 <span class="keywordflow">for</span>(map<string,string>::const_iterator i=<a class="code" href="a00060.html#o1">_attr</a>.begin();
<a name="l00049"></a>00049 i!=<a class="code" href="a00060.html#o1">_attr</a>.end();
<a name="l00050"></a>00050 ++i)
<a name="l00051"></a>00051 {
<a name="l00052"></a>00052 os<<<span class="stringliteral">" "</span><<i->first<<<span class="stringliteral">"="</span><<i->second<<<span class="charliteral">'\n'</span>;
<a name="l00053"></a>00053 }
<a name="l00054"></a>00054 os<<<span class="stringliteral">" ;;\n"</span>;
<a name="l00055"></a>00055 name+=<span class="stringliteral">"/"</span>;
<a name="l00056"></a>00056 }
<a name="l00057"></a>00057 <span class="keywordflow">for</span>(map<string,PersistNode*>::const_iterator i=<a class="code" href="a00060.html#o0">_child</a>.begin();
<a name="l00058"></a>00058 i!=<a class="code" href="a00060.html#o0">_child</a>.end();
<a name="l00059"></a>00059 ++i)
<a name="l00060"></a>00060 {
<a name="l00061"></a>00061 i->second->output(os,name+i->first);
<a name="l00062"></a>00062 }
<a name="l00063"></a>00063 }
<a name="l00064"></a>00064
<a name="l00065"></a>00065
<a name="l00066"></a><a class="code" href="a00060.html#a4">00066</a> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="a00060.html#a4">PersistNode::readnode</a>(istream& is)
<a name="l00067"></a>00067 {
<a name="l00068"></a>00068 <a class="code" href="a00060.html">PersistNode</a>* node =NULL;
<a name="l00069"></a>00069 string tok;
<a name="l00070"></a>00070 <span class="keywordflow">while</span>(<span class="keyword">true</span>)
<a name="l00071"></a>00071 {
<a name="l00072"></a>00072 <span class="keywordflow">if</span>(!<a class="code" href="a00060.html#a5">readtoken</a>(is,tok) || tok==<span class="stringliteral">";;"</span>)
<a name="l00073"></a>00073 <span class="keywordflow">return</span> bool(node);
<a name="l00074"></a>00074 <span class="keywordflow">else</span> <span class="keywordflow">if</span>(node)
<a name="l00075"></a>00075 node-><a class="code" href="a00060.html#a8">addattr</a>(tok);
<a name="l00076"></a>00076 <span class="keywordflow">else</span> <span class="keywordflow">if</span>(tok[0]==<span class="charliteral">'-'</span>)
<a name="l00077"></a>00077 <a class="code" href="a00060.html#a7">delnode</a>(tok.substr(1));
<a name="l00078"></a>00078 <span class="keywordflow">else</span>
<a name="l00079"></a>00079 node=<a class="code" href="a00060.html#a6">addnode</a>(tok);
<a name="l00080"></a>00080 }
<a name="l00081"></a>00081 }
<a name="l00082"></a>00082
<a name="l00083"></a><a class="code" href="a00060.html#a5">00083</a> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="a00060.html#a5">PersistNode::readtoken</a>(istream& is, string& tok)
<a name="l00084"></a>00084 {
<a name="l00085"></a>00085 <span class="keywordflow">while</span>(is)
<a name="l00086"></a>00086 {
<a name="l00087"></a>00087 is>>tok;
<a name="l00088"></a>00088 <span class="keywordflow">if</span>(tok.empty())
<a name="l00089"></a>00089 <span class="keywordflow">break</span>;
<a name="l00090"></a>00090 <span class="keywordflow">if</span>(tok[0]!=<span class="charliteral">'#'</span>)
<a name="l00091"></a>00091 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00092"></a>00092 is.ignore(INT_MAX,<span class="charliteral">'\n'</span>);
<a name="l00093"></a>00093 }
<a name="l00094"></a>00094 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00095"></a>00095 }
<a name="l00096"></a>00096
<a name="l00097"></a><a class="code" href="a00060.html#a6">00097</a> <a class="code" href="a00060.html">PersistNode</a>* <a class="code" href="a00060.html#a6">PersistNode::addnode</a>(<span class="keyword">const</span> string& name)
<a name="l00098"></a>00098 {
<a name="l00099"></a>00099 string::size_type pos =name.find(<span class="charliteral">'/'</span>);
<a name="l00100"></a>00100 <span class="comment">// get reference to Next node in the path.</span>
<a name="l00101"></a>00101 <a class="code" href="a00060.html">PersistNode</a>*& newchild =<a class="code" href="a00060.html#o0">_child</a>[name.substr(0,pos)];
<a name="l00102"></a>00102
<a name="l00103"></a>00103 <span class="keywordflow">if</span>(pos==string::npos) <span class="comment">// leaf: add new leaf.</span>
<a name="l00104"></a>00104 {
<a name="l00105"></a>00105 <span class="keywordflow">if</span>(newchild)
<a name="l00106"></a>00106 <span class="keyword">delete</span> newchild; <span class="comment">// overwrite old leaf (and its children)</span>
<a name="l00107"></a>00107 newchild=<span class="keyword">new</span> <a class="code" href="a00060.html#a0">PersistNode</a>();
<a name="l00108"></a>00108 <span class="keywordflow">return</span> newchild;
<a name="l00109"></a>00109 }
<a name="l00110"></a>00110 <span class="keywordflow">else</span> <span class="comment">// branch: just add the branch if it's missing, and then recurse.</span>
<a name="l00111"></a>00111 {
<a name="l00112"></a>00112 <span class="keywordflow">if</span>(!newchild)
<a name="l00113"></a>00113 newchild=<span class="keyword">new</span> <a class="code" href="a00060.html#a0">PersistNode</a>();
<a name="l00114"></a>00114 <span class="keywordflow">return</span> newchild-><a class="code" href="a00060.html#a6">addnode</a>(name.substr(pos+1));
<a name="l00115"></a>00115 }
<a name="l00116"></a>00116 }
<a name="l00117"></a>00117
<a name="l00118"></a><a class="code" href="a00060.html#a7">00118</a> <span class="keywordtype">void</span> <a class="code" href="a00060.html#a7">PersistNode::delnode</a>(<span class="keyword">const</span> string& name)
<a name="l00119"></a>00119 {
<a name="l00120"></a>00120 string::size_type pos =name.find(<span class="charliteral">'/'</span>);
<a name="l00121"></a>00121 <span class="comment">// get reference to Next node in the path.</span>
<a name="l00122"></a>00122 map<string,PersistNode*>::iterator childpos =<a class="code" href="a00060.html#o0">_child</a>.find(name.substr(0,pos));
<a name="l00123"></a>00123 <span class="keywordflow">if</span>(childpos!=<a class="code" href="a00060.html#o0">_child</a>.end())
<a name="l00124"></a>00124 {
<a name="l00125"></a>00125 <span class="keywordflow">if</span>(pos==string::npos) <span class="comment">// leaf: delete leaf.</span>
<a name="l00126"></a>00126 {
<a name="l00127"></a>00127 <span class="keyword">delete</span> childpos->second;
<a name="l00128"></a>00128 <a class="code" href="a00060.html#o0">_child</a>.erase(childpos);
<a name="l00129"></a>00129 }
<a name="l00130"></a>00130 <span class="keywordflow">else</span> <span class="comment">// branch: recurse</span>
<a name="l00131"></a>00131 {
<a name="l00132"></a>00132 childpos->second->delnode(name.substr(pos+1));
<a name="l00133"></a>00133 }
<a name="l00134"></a>00134 }
<a name="l00135"></a>00135 }
<a name="l00136"></a>00136
<a name="l00137"></a><a class="code" href="a00060.html#a8">00137</a> <span class="keywordtype">void</span> <a class="code" href="a00060.html#a8">PersistNode::addattr</a>(<span class="keyword">const</span> string& keyvalue)
<a name="l00138"></a>00138 {
<a name="l00139"></a>00139 string::size_type pos =keyvalue.find(<span class="charliteral">'='</span>);
<a name="l00140"></a>00140 <a class="code" href="a00060.html#o1">_attr</a>[keyvalue.substr(0,pos)]=(pos==string::npos?<span class="stringliteral">""</span>:keyvalue.substr(pos+1));
<a name="l00141"></a>00141 }
<a name="l00142"></a>00142
<a name="l00143"></a><a class="code" href="a00060.html#a9">00143</a> <span class="keywordtype">void</span> <a class="code" href="a00060.html#a8">PersistNode::addattr</a>(<span class="keyword">const</span> string& key, <span class="keywordtype">long</span> value)
<a name="l00144"></a>00144 {
<a name="l00145"></a>00145 <span class="keywordtype">char</span> buf[64];
<a name="l00146"></a>00146 sprintf(buf,<span class="stringliteral">"%i"</span>,value);
<a name="l00147"></a>00147 <a class="code" href="a00060.html#o1">_attr</a>[key]=string(buf);
<a name="l00148"></a>00148 }
<a name="l00149"></a>00149
<a name="l00150"></a><a class="code" href="a00060.html#a10">00150</a> <span class="keywordtype">bool</span> <a class="code" href="a00060.html#a10">PersistNode::hasAttr</a>(<span class="keyword">const</span> string& key)<span class="keyword"> const</span>
<a name="l00151"></a>00151 <span class="keyword"></span>{
<a name="l00152"></a>00152 <span class="keywordflow">return</span>( <a class="code" href="a00060.html#o1">_attr</a>.find(key)!=<a class="code" href="a00060.html#o1">_attr</a>.end() );
<a name="l00153"></a>00153 }
<a name="l00154"></a><a class="code" href="a00060.html#a11">00154</a> string <a class="code" href="a00060.html#a11">PersistNode::attrString</a>(<span class="keyword">const</span> string& key, <span class="keyword">const</span> string& fallback)<span class="keyword"> const</span>
<a name="l00155"></a>00155 <span class="keyword"></span>{
<a name="l00156"></a>00156 map<string,string>::const_iterator pos=<a class="code" href="a00060.html#o1">_attr</a>.find(key);
<a name="l00157"></a>00157 <span class="keywordflow">if</span>(pos==<a class="code" href="a00060.html#o1">_attr</a>.end())
<a name="l00158"></a>00158 <span class="keywordflow">return</span> fallback;
<a name="l00159"></a>00159 <span class="keywordflow">else</span>
<a name="l00160"></a>00160 <span class="keywordflow">return</span> pos->second;
<a name="l00161"></a>00161 }
<a name="l00162"></a><a class="code" href="a00060.html#a12">00162</a> <span class="keywordtype">long</span> <a class="code" href="a00060.html#a12">PersistNode::attrLong</a>(<span class="keyword">const</span> string& key, <span class="keywordtype">long</span> fallback)<span class="keyword"> const</span>
<a name="l00163"></a>00163 <span class="keyword"></span>{
<a name="l00164"></a>00164 map<string,string>::const_iterator pos=<a class="code" href="a00060.html#o1">_attr</a>.find(key);
<a name="l00165"></a>00165 <span class="keywordflow">if</span>(pos==<a class="code" href="a00060.html#o1">_attr</a>.end())
<a name="l00166"></a>00166 <span class="keywordflow">return</span> fallback;
<a name="l00167"></a>00167 <span class="keywordflow">else</span>
<a name="l00168"></a>00168 <span class="keywordflow">return</span> atol(pos->second.c_str());
<a name="l00169"></a>00169 }
<a name="l00170"></a><a class="code" href="a00060.html#a13">00170</a> <a class="code" href="a00060.html">PersistNode</a>* <a class="code" href="a00060.html#a13">PersistNode::child</a>(<span class="keyword">const</span> string& key)<span class="keyword"> const</span>
<a name="l00171"></a>00171 <span class="keyword"></span>{
<a name="l00172"></a>00172 map<string,PersistNode*>::const_iterator pos=<a class="code" href="a00060.html#o0">_child</a>.find(key);
<a name="l00173"></a>00173 <span class="keywordflow">if</span>(pos==<a class="code" href="a00060.html#o0">_child</a>.end())
<a name="l00174"></a>00174 <span class="keywordflow">return</span> NULL;
<a name="l00175"></a>00175 <span class="keywordflow">else</span>
<a name="l00176"></a>00176 <span class="keywordflow">return</span> pos->second;
<a name="l00177"></a>00177 }
<a name="l00178"></a>00178
<a name="l00179"></a>00179 }; <span class="comment">// end namespace OmniEvents</span>
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