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<hr><h1>PersistNode.cc</h1><a href="a00116.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 <font class="comment">// Package : omniEvents</font>
00002 <font class="comment">// PersistNode.cc Created : 2004/04/29</font>
00003 <font class="comment">// Author : Alex Tingle</font>
00004 <font class="comment">//</font>
00005 <font class="comment">// Copyright (C) 2004 Alex Tingle.</font>
00006 <font class="comment">//</font>
00007 <font class="comment">// This file is part of the omniEvents application.</font>
00008 <font class="comment">//</font>
00009 <font class="comment">// omniEvents is free software; you can redistribute it and/or</font>
00010 <font class="comment">// modify it under the terms of the GNU Lesser General Public</font>
00011 <font class="comment">// License as published by the Free Software Foundation; either</font>
00012 <font class="comment">// version 2.1 of the License, or (at your option) any later version.</font>
00013 <font class="comment">//</font>
00014 <font class="comment">// omniEvents is distributed in the hope that it will be useful,</font>
00015 <font class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</font>
00016 <font class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font>
00017 <font class="comment">// Lesser General Public License for more details.</font>
00018 <font class="comment">//</font>
00019 <font class="comment">// You should have received a copy of the GNU Lesser General Public</font>
00020 <font class="comment">// License along with this library; if not, write to the Free Software</font>
00021 <font class="comment">// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</font>
00022 <font class="comment">//</font>
00023
00024 <font class="preprocessor">#include "<a class="code" href="a00117.html">PersistNode.h</a>"</font>
00025
00026 <font class="preprocessor">#include <stdlib.h></font>
00027 <font class="preprocessor">#include <stdio.h></font>
00028
00029 <font class="keyword">namespace </font>OmniEvents {
00030
00031
<a name="l00032"></a><a class="code" href="a00060.html#a1">00032</a> PersistNode::PersistNode(istream& is)
00033 {
00034 <font class="keywordflow">while</font>( <a class="code" href="a00060.html#a4">readnode</a>(is) ){}
00035 }
00036
<a name="l00037"></a><a class="code" href="a00060.html#a2">00037</a> PersistNode::~PersistNode()
00038 {
00039 <font class="keywordflow">for</font>(map<string,PersistNode*>::iterator i=<a class="code" href="a00060.html#m0">_child</a>.begin(); i!=<a class="code" href="a00060.html#m0">_child</a>.end(); ++i)
00040 <font class="keyword">delete</font> i->second;
00041 }
00042
<a name="l00043"></a><a class="code" href="a00060.html#a3">00043</a> <font class="keywordtype">void</font> PersistNode::output(ostream& os,string name)<font class="keyword"> const</font>
00044 <font class="keyword"></font>{
00045 <font class="keywordflow">if</font>(!name.empty()) <font class="comment">// Don't output root node.</font>
00046 {
00047 os<<name<<<font class="charliteral">'\n'</font>;
00048 <font class="keywordflow">for</font>(map<string,string>::const_iterator i=<a class="code" href="a00060.html#m1">_attr</a>.begin();
00049 i!=<a class="code" href="a00060.html#m1">_attr</a>.end();
00050 ++i)
00051 {
00052 os<<<font class="stringliteral">" "</font><<i->first<<<font class="stringliteral">"="</font><<i->second<<<font class="charliteral">'\n'</font>;
00053 }
00054 os<<<font class="stringliteral">" ;;\n"</font>;
00055 name+=<font class="stringliteral">"/"</font>;
00056 }
00057 <font class="keywordflow">for</font>(map<string,PersistNode*>::const_iterator i=<a class="code" href="a00060.html#m0">_child</a>.begin();
00058 i!=<a class="code" href="a00060.html#m0">_child</a>.end();
00059 ++i)
00060 {
00061 i->second->output(os,name+i->first);
00062 }
00063 }
00064
00065
<a name="l00066"></a><a class="code" href="a00060.html#a4">00066</a> <font class="keyword">inline</font> <font class="keywordtype">bool</font> PersistNode::readnode(istream& is)
00067 {
00068 <a class="code" href="a00060.html">PersistNode</a>* node =NULL;
00069 string tok;
00070 <font class="keywordflow">while</font>(true)
00071 {
00072 <font class="keywordflow">if</font>(!<a class="code" href="a00060.html#a5">readtoken</a>(is,tok) || tok==<font class="stringliteral">";;"</font>)
00073 <font class="keywordflow">return</font> bool(node);
00074 <font class="keywordflow">else</font> <font class="keywordflow">if</font>(node)
00075 node-><a class="code" href="a00060.html#a8">addattr</a>(tok);
00076 <font class="keywordflow">else</font> <font class="keywordflow">if</font>(tok[0]==<font class="charliteral">'-'</font>)
00077 <a class="code" href="a00060.html#a7">delnode</a>(tok.substr(1));
00078 <font class="keywordflow">else</font>
00079 node=<a class="code" href="a00060.html#a6">addnode</a>(tok);
00080 }
00081 }
00082
<a name="l00083"></a><a class="code" href="a00060.html#a5">00083</a> <font class="keyword">inline</font> <font class="keywordtype">bool</font> PersistNode::readtoken(istream& is, string& tok)
00084 {
00085 <font class="keywordflow">while</font>(is)
00086 {
00087 is>>tok;
00088 <font class="keywordflow">if</font>(tok.empty())
00089 <font class="keywordflow">break</font>;
00090 <font class="keywordflow">if</font>(tok[0]!=<font class="charliteral">'#'</font>)
00091 <font class="keywordflow">return</font> <font class="keyword">true</font>;
00092 is.ignore(INT_MAX,<font class="charliteral">'\n'</font>);
00093 }
00094 <font class="keywordflow">return</font> <font class="keyword">false</font>;
00095 }
00096
<a name="l00097"></a><a class="code" href="a00060.html#a6">00097</a> <a class="code" href="a00060.html">PersistNode</a>* PersistNode::addnode(<font class="keyword">const</font> string& name)
00098 {
00099 string::size_type pos =name.find(<font class="charliteral">'/'</font>);
00100 <font class="comment">// get reference to Next node in the path.</font>
00101 <a class="code" href="a00060.html">PersistNode</a>*& newchild =<a class="code" href="a00060.html#m0">_child</a>[name.substr(0,pos)];
00102
00103 <font class="keywordflow">if</font>(pos==string::npos) <font class="comment">// leaf: add new leaf.</font>
00104 {
00105 <font class="keywordflow">if</font>(newchild)
00106 <font class="keyword">delete</font> newchild; <font class="comment">// overwrite old leaf (and its children)</font>
00107 newchild=<font class="keyword">new</font> <a class="code" href="a00060.html#a0">PersistNode</a>();
00108 <font class="keywordflow">return</font> newchild;
00109 }
00110 <font class="keywordflow">else</font> <font class="comment">// branch: just add the branch if it's missing, and then recurse.</font>
00111 {
00112 <font class="keywordflow">if</font>(!newchild)
00113 newchild=<font class="keyword">new</font> <a class="code" href="a00060.html#a0">PersistNode</a>();
00114 <font class="keywordflow">return</font> newchild-><a class="code" href="a00060.html#a6">addnode</a>(name.substr(pos+1));
00115 }
00116 }
00117
<a name="l00118"></a><a class="code" href="a00060.html#a7">00118</a> <font class="keywordtype">void</font> PersistNode::delnode(<font class="keyword">const</font> string& name)
00119 {
00120 string::size_type pos =name.find(<font class="charliteral">'/'</font>);
00121 <font class="comment">// get reference to Next node in the path.</font>
00122 map<string,PersistNode*>::iterator childpos =<a class="code" href="a00060.html#m0">_child</a>.find(name.substr(0,pos));
00123 <font class="keywordflow">if</font>(childpos!=<a class="code" href="a00060.html#m0">_child</a>.end())
00124 {
00125 <font class="keywordflow">if</font>(pos==string::npos) <font class="comment">// leaf: delete leaf.</font>
00126 {
00127 <font class="keyword">delete</font> childpos->second;
00128 <a class="code" href="a00060.html#m0">_child</a>.erase(childpos);
00129 }
00130 <font class="keywordflow">else</font> <font class="comment">// branch: recurse</font>
00131 {
00132 childpos->second->delnode(name.substr(pos+1));
00133 }
00134 }
00135 }
00136
<a name="l00137"></a><a class="code" href="a00060.html#a8">00137</a> <font class="keywordtype">void</font> PersistNode::addattr(<font class="keyword">const</font> string& keyvalue)
00138 {
00139 string::size_type pos =keyvalue.find(<font class="charliteral">'='</font>);
00140 <a class="code" href="a00060.html#m1">_attr</a>[keyvalue.substr(0,pos)]=(pos==string::npos?<font class="stringliteral">""</font>:keyvalue.substr(pos+1));
00141 }
00142
<a name="l00143"></a><a class="code" href="a00060.html#a9">00143</a> <font class="keywordtype">void</font> PersistNode::addattr(<font class="keyword">const</font> string& key, <font class="keywordtype">long</font> value)
00144 {
00145 <font class="keywordtype">char</font> buf[64];
00146 sprintf(buf,<font class="stringliteral">"%i"</font>,value);
00147 <a class="code" href="a00060.html#m1">_attr</a>[key]=string(buf);
00148 }
00149
<a name="l00150"></a><a class="code" href="a00060.html#a10">00150</a> <font class="keywordtype">bool</font> PersistNode::hasAttr(<font class="keyword">const</font> string& key)<font class="keyword"> const</font>
00151 <font class="keyword"></font>{
00152 <font class="keywordflow">return</font>( <a class="code" href="a00060.html#m1">_attr</a>.find(key)!=<a class="code" href="a00060.html#m1">_attr</a>.end() );
00153 }
<a name="l00154"></a><a class="code" href="a00060.html#a11">00154</a> string PersistNode::attrString(<font class="keyword">const</font> string& key, <font class="keyword">const</font> string& fallback)<font class="keyword"> const</font>
00155 <font class="keyword"></font>{
00156 map<string,string>::const_iterator pos=<a class="code" href="a00060.html#m1">_attr</a>.find(key);
00157 <font class="keywordflow">if</font>(pos==<a class="code" href="a00060.html#m1">_attr</a>.end())
00158 <font class="keywordflow">return</font> fallback;
00159 <font class="keywordflow">else</font>
00160 <font class="keywordflow">return</font> pos->second;
00161 }
<a name="l00162"></a><a class="code" href="a00060.html#a12">00162</a> <font class="keywordtype">long</font> PersistNode::attrLong(<font class="keyword">const</font> string& key, <font class="keywordtype">long</font> fallback)<font class="keyword"> const</font>
00163 <font class="keyword"></font>{
00164 map<string,string>::const_iterator pos=<a class="code" href="a00060.html#m1">_attr</a>.find(key);
00165 <font class="keywordflow">if</font>(pos==<a class="code" href="a00060.html#m1">_attr</a>.end())
00166 <font class="keywordflow">return</font> fallback;
00167 <font class="keywordflow">else</font>
00168 <font class="keywordflow">return</font> atol(pos->second.c_str());
00169 }
<a name="l00170"></a><a class="code" href="a00060.html#a13">00170</a> <a class="code" href="a00060.html">PersistNode</a>* PersistNode::child(<font class="keyword">const</font> string& key)<font class="keyword"> const</font>
00171 <font class="keyword"></font>{
00172 map<string,PersistNode*>::const_iterator pos=<a class="code" href="a00060.html#m0">_child</a>.find(key);
00173 <font class="keywordflow">if</font>(pos==<a class="code" href="a00060.html#m0">_child</a>.end())
00174 <font class="keywordflow">return</font> NULL;
00175 <font class="keywordflow">else</font>
00176 <font class="keywordflow">return</font> pos->second;
00177 }
00178
00179 }; <font class="comment">// end namespace OmniEvents</font>
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