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<div class="title">GermanStemmer.cs</div> </div>
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<a href="_analyzers_2_de_2_german_stemmer_8cs.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment"> * Licensed to the Apache Software Foundation (ASF) under one</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment"> * or more contributor license agreements. See the NOTICE file</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment"> * distributed with this work for additional information</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment"> * regarding copyright ownership. The ASF licenses this file</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment"> * to you under the Apache License, Version 2.0 (the</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment"> * &quot;License&quot;); you may not use this file except in compliance</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment"> * with the License. You may obtain a copy of the License at</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="comment"> * Unless required by applicable law or agreed to in writing,</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="comment"> * software distributed under the License is distributed on an</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="comment"> * &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="comment"> * KIND, either express or implied. See the License for the</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="comment"> * specific language governing permissions and limitations</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="comment"> * under the License.</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="comment">*/</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;<span class="keyword">using</span> System;</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="keyword">using</span> System.IO;</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="keyword">using</span> System.Text;</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;<span class="keyword">using</span> System.Collections;</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="keyword">namespace </span>Lucene.Net.Analysis.De</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;{</div>
<div class="line"><a name="l00034"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_de_1_1_german_stemmer.html"> 34</a></span>&#160; <span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_de_1_1_german_stemmer.html" title="A stemmer for German words. The algorithm is based on the report &quot;A Fast and Simple Stemming Algorith...">GermanStemmer</a></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; {</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; <span class="keyword">private</span> StringBuilder sb = <span class="keyword">new</span> StringBuilder();</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160;</div>
<div class="line"><a name="l00044"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_de_1_1_german_stemmer.html#a8aace7e170eac3b44070feb75dc9cbe0"> 44</a></span>&#160; <span class="keyword">protected</span> <span class="keywordtype">int</span> substCount = 0;</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; <span class="keyword">internal</span> String Stem( String term )</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; {</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <span class="comment">// Use lowercase for medium stemming.</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; term = term.ToLower();</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; <span class="keywordflow">if</span> ( !IsStemmable( term ) )</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; <span class="keywordflow">return</span> term;</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; <span class="comment">// Reset the StringBuilder.</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; sb.Remove(0, sb.Length);</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; sb.Insert(0, term);</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <span class="comment">// Stemming starts here...</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; Substitute( sb );</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; Strip( sb );</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; Optimize( sb );</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; Resubstitute( sb );</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; RemoveParticleDenotion( sb );</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="keywordflow">return</span> sb.ToString();</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; }</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160;</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; <span class="keyword">private</span> <span class="keywordtype">bool</span> IsStemmable( String term )</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; {</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> c = 0; c &lt; term.Length; c++ ) </div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; {</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <span class="keywordflow">if</span> ( !Char.IsLetter(term[c])) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; }</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; }</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160;</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; <span class="keyword">private</span> <span class="keywordtype">void</span> Strip( StringBuilder buffer )</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; {</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; <span class="keywordtype">bool</span> doMore = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; <span class="keywordflow">while</span> ( doMore &amp;&amp; buffer.Length &gt; 3 ) </div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; {</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; <span class="keywordflow">if</span> ( ( buffer.Length + substCount &gt; 5 ) &amp;&amp;</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; buffer.ToString().Substring(buffer.Length - 2, 2).Equals( <span class="stringliteral">&quot;nd&quot;</span> ) )</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; {</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; buffer.Remove( buffer.Length - 2, 2 );</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; }</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( ( buffer.Length + substCount &gt; 4 ) &amp;&amp;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; buffer.ToString().Substring( buffer.Length - 2, 2).Equals( <span class="stringliteral">&quot;em&quot;</span> ) ) </div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; {</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; buffer.Remove( buffer.Length - 2, 2 );</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; }</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( ( buffer.Length + substCount &gt; 4 ) &amp;&amp;</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; buffer.ToString().Substring( buffer.Length - 2, 2).Equals( <span class="stringliteral">&quot;er&quot;</span> ) ) </div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; {</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160; buffer.Remove( buffer.Length - 2, 2 );</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160; }</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( buffer[buffer.Length - 1] == <span class="charliteral">&#39;e&#39;</span> ) </div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160; {</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; buffer.Remove(buffer.Length - 1, 1);</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; }</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( buffer[buffer.Length - 1] == <span class="charliteral">&#39;s&#39;</span> ) </div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; {</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; buffer.Remove(buffer.Length - 1, 1);</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; }</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( buffer[buffer.Length - 1] == <span class="charliteral">&#39;n&#39;</span> ) </div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; {</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160; buffer.Remove(buffer.Length - 1, 1);</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160; }</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; <span class="comment">// &quot;t&quot; occurs only as suffix of verbs.</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( buffer[buffer.Length - 1] == <span class="charliteral">&#39;t&#39;</span>) </div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160; {</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; buffer.Remove(buffer.Length - 1, 1);</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160; }</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160; <span class="keywordflow">else</span> </div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160; {</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160; doMore = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160; }</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160; }</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>&#160; }</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160;</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>&#160; <span class="keyword">private</span> <span class="keywordtype">void</span> Optimize( StringBuilder buffer )</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>&#160; {</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>&#160; <span class="comment">// Additional step for female plurals of professions and inhabitants.</span></div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>&#160; <span class="keywordflow">if</span> ( buffer.Length &gt; 5 &amp;&amp; buffer.ToString().Substring(buffer.Length - 5, 5).Equals( <span class="stringliteral">&quot;erin*&quot;</span> )) </div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>&#160; {</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>&#160; buffer.Remove(buffer.Length - 1, 1);</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>&#160; Strip(buffer);</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>&#160; }</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160; <span class="comment">// Additional step for irregular plural nouns like &quot;Matrizen -&gt; Matrix&quot;.</span></div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160; <span class="keywordflow">if</span> ( buffer[buffer.Length - 1] == (<span class="charliteral">&#39;z&#39;</span>) ) </div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160; {</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160; buffer[buffer.Length - 1] = <span class="charliteral">&#39;x&#39;</span>;</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160; }</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160; }</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160;</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>&#160; <span class="keyword">private</span> <span class="keywordtype">void</span> RemoveParticleDenotion( StringBuilder buffer )</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160; {</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>&#160; <span class="keywordflow">if</span> ( buffer.Length &gt; 4 ) </div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160; {</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160; <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> c = 0; c &lt; buffer.Length - 3; c++ ) </div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160; {</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160; <span class="keywordflow">if</span> ( buffer.ToString().Substring( c, 4 ).Equals( <span class="stringliteral">&quot;gege&quot;</span> ) ) </div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>&#160; {</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160; buffer.Remove(c, 2);</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160; <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>&#160; }</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160; }</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160; }</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160; }</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160;</div>
<div class="line"><a name="l00184"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_de_1_1_german_stemmer.html#a8bf30d38d99604b1f6baa74be1be991e"> 184</a></span>&#160; <span class="keyword">protected</span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> Substitute( StringBuilder buffer )</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160; {</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>&#160; substCount = 0;</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>&#160; <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> c = 0; c &lt; buffer.Length; c++ ) </div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>&#160; {</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>&#160; <span class="comment">// Replace the second char of a pair of the equal characters with an asterisk</span></div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>&#160; <span class="keywordflow">if</span> (c &gt; 0 &amp;&amp; buffer[c] == buffer[c - 1])</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>&#160; {</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>&#160; buffer[c] = <span class="charliteral">&#39;*&#39;</span>;</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>&#160; }</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>&#160; <span class="comment">// Substitute Umlauts.</span></div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> (buffer[c] == <span class="stringliteral">&#39;ä&#39;</span>)</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>&#160; {</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>&#160; buffer[c] = <span class="charliteral">&#39;a&#39;</span>;</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>&#160; }</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> (buffer[c] == <span class="stringliteral">&#39;ö&#39;</span>)</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>&#160; {</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>&#160; buffer[c] = <span class="charliteral">&#39;o&#39;</span>;</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>&#160; }</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> (buffer[c] == <span class="stringliteral">&#39;ü&#39;</span>)</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>&#160; {</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>&#160; buffer[c] = <span class="charliteral">&#39;u&#39;</span>;</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>&#160; }</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160; <span class="comment">// Fix bug so that &#39;ß&#39; at the end of a word is replaced.</span></div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> (buffer[c] == <span class="stringliteral">&#39;ß&#39;</span>)</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160; {</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>&#160; buffer[c] = <span class="charliteral">&#39;s&#39;</span>;</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>&#160; buffer.Insert(c + 1, <span class="charliteral">&#39;s&#39;</span>);</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160; substCount++;</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160; }</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>&#160;</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>&#160; <span class="comment">// Take care that at least one character is left left side from the current one</span></div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>&#160; <span class="keywordflow">if</span> ( c &lt; buffer.Length - 1 ) </div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>&#160; {</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>&#160; <span class="comment">// Masking several common character combinations with an token</span></div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>&#160; <span class="keywordflow">if</span> ( ( c &lt; buffer.Length - 2 ) &amp;&amp; buffer[c] == <span class="charliteral">&#39;s&#39;</span> &amp;&amp;</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>&#160; buffer[c + 1] == <span class="charliteral">&#39;c&#39;</span> &amp;&amp; buffer[c + 2] == <span class="charliteral">&#39;h&#39;</span> )</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160; {</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>&#160; buffer[c] = <span class="charliteral">&#39;$&#39;</span>;</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>&#160; buffer.Remove(c + 1, 2);</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>&#160; substCount =+ 2;</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>&#160; }</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( buffer[c] == <span class="charliteral">&#39;c&#39;</span> &amp;&amp; buffer[c + 1] == <span class="charliteral">&#39;h&#39;</span> ) </div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>&#160; {</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>&#160; buffer[c] = <span class="stringliteral">&#39;§&#39;</span>;</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>&#160; buffer.Remove(c + 1, 1);</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>&#160; substCount++;</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>&#160; }</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( buffer[c] == <span class="charliteral">&#39;e&#39;</span> &amp;&amp; buffer[c + 1] == <span class="charliteral">&#39;i&#39;</span> ) </div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>&#160; {</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>&#160; buffer[c] = <span class="charliteral">&#39;%&#39;</span>;</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>&#160; buffer.Remove(c + 1, 1);</div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>&#160; substCount++;</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>&#160; }</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( buffer[c] == <span class="charliteral">&#39;i&#39;</span> &amp;&amp; buffer[c + 1] == <span class="charliteral">&#39;e&#39;</span> ) </div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>&#160; {</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>&#160; buffer[c] = <span class="charliteral">&#39;&amp;&#39;</span>;</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>&#160; buffer.Remove(c + 1, 1);</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>&#160; substCount++;</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>&#160; }</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( buffer[c] == <span class="charliteral">&#39;i&#39;</span> &amp;&amp; buffer[c + 1] == <span class="charliteral">&#39;g&#39;</span> ) </div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>&#160; {</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>&#160; buffer[c] = <span class="charliteral">&#39;#&#39;</span>;</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>&#160; buffer.Remove(c + 1, 1);</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>&#160; substCount++;</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>&#160; }</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( buffer[c] == <span class="charliteral">&#39;s&#39;</span> &amp;&amp; buffer[c + 1] == <span class="charliteral">&#39;t&#39;</span> ) </div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>&#160; {</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>&#160; buffer[c] = <span class="charliteral">&#39;!&#39;</span>;</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>&#160; buffer.Remove(c + 1, 1);</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>&#160; substCount++;</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>&#160; }</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>&#160; }</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>&#160; }</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>&#160; }</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>&#160;</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>&#160; <span class="keyword">private</span> <span class="keywordtype">void</span> Resubstitute( StringBuilder buffer )</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>&#160; {</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>&#160; <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> c = 0; c &lt; buffer.Length; c++ ) </div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>&#160; {</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>&#160; <span class="keywordflow">if</span> ( buffer[c] == <span class="charliteral">&#39;*&#39;</span> ) </div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>&#160; {</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>&#160; <span class="keywordtype">char</span> x = buffer[c - 1];</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>&#160; buffer[c] = x;</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>&#160; }</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( buffer[c] == <span class="charliteral">&#39;$&#39;</span> ) </div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>&#160; {</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>&#160; buffer[c] = <span class="charliteral">&#39;s&#39;</span>;</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>&#160; buffer.Insert( c + 1, <span class="keyword">new</span> <span class="keywordtype">char</span>[]{<span class="charliteral">&#39;c&#39;</span>, <span class="charliteral">&#39;h&#39;</span>}, 0, 2);</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>&#160; }</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( buffer[c] == <span class="stringliteral">&#39;§&#39;</span> ) </div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>&#160; {</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>&#160; buffer[c] = <span class="charliteral">&#39;c&#39;</span>;</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>&#160; buffer.Insert( c + 1, <span class="charliteral">&#39;h&#39;</span> );</div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>&#160; }</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( buffer[c] == <span class="charliteral">&#39;%&#39;</span> ) </div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>&#160; {</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>&#160; buffer[c] = <span class="charliteral">&#39;e&#39;</span>;</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>&#160; buffer.Insert( c + 1, <span class="charliteral">&#39;i&#39;</span> );</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>&#160; }</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( buffer[c] == <span class="charliteral">&#39;&amp;&#39;</span> ) </div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>&#160; {</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>&#160; buffer[c] = <span class="charliteral">&#39;i&#39;</span>;</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>&#160; buffer.Insert( c + 1, <span class="charliteral">&#39;e&#39;</span> );</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>&#160; }</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( buffer[c] == <span class="charliteral">&#39;#&#39;</span> ) </div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>&#160; {</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>&#160; buffer[c] = <span class="charliteral">&#39;i&#39;</span>;</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>&#160; buffer.Insert( c + 1, <span class="charliteral">&#39;g&#39;</span> );</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>&#160; }</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>&#160; <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( buffer[c] == <span class="charliteral">&#39;!&#39;</span> ) </div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>&#160; {</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>&#160; buffer[c] = <span class="charliteral">&#39;s&#39;</span>;</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>&#160; buffer.Insert( c + 1, <span class="charliteral">&#39;t&#39;</span> );</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>&#160; }</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>&#160; }</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>&#160; }</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>&#160; }</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>&#160;}</div>
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