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| <div class="title">ArabicStemmer.cs</div> </div> |
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| <a href="_arabic_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> <span class="comment">/*</span></div> |
| <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Licensed to the Apache Software Foundation (ASF) under one or more</span></div> |
| <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * contributor license agreements. See the NOTICE file distributed with</span></div> |
| <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * this work for additional information regarding copyright ownership.</span></div> |
| <div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * The ASF licenses this file to You under the Apache License, Version 2.0</span></div> |
| <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * (the "License"); you may not use this file except in compliance with</span></div> |
| <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * the License. You may obtain a copy of the License at</span></div> |
| <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div> |
| <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * Unless required by applicable law or agreed to in writing, software</span></div> |
| <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</span></div> |
| <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div> |
| <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * See the License for the specific language governing permissions and</span></div> |
| <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * limitations under the License.</span></div> |
| <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div> |
| <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">using</span> System;</div> |
| <div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">using</span> System.IO;</div> |
| <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="keyword">using</span> System.Collections;</div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> </div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">using</span> Lucene.Net.Analysis;</div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="keyword">using</span> Lucene.Net.Analysis.Tokenattributes;</div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="keyword">using</span> Lucene.Net.Util;</div> |
| <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div> |
| <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div> |
| <div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">namespace </span>Lucene.Net.Analysis.AR</div> |
| <div class="line"><a name="l00028"></a><span class="lineno"> 28</span> {</div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div> |
| <div class="line"><a name="l00030"></a><span class="lineno"> 30</span> </div> |
| <div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="comment">/*</span></div> |
| <div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> * Stemmer for Arabic.</span></div> |
| <div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> * <p/></span></div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> * Stemming is done in-place for efficiency, operating on a termbuffer.</span></div> |
| <div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> * <p/></span></div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"> * Stemming is defined as:</span></div> |
| <div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> * <ul></span></div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> * <li> Removal of attached definite article, conjunction, and prepositions.</li></span></div> |
| <div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> * <li> Stemming of common suffixes.</li></span></div> |
| <div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> * </ul></span></div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00043"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_stemmer.html"> 43</a></span>  <span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_stemmer.html">ArabicStemmer</a></div> |
| <div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  {</div> |
| <div class="line"><a name="l00045"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_stemmer.html#af3defd14531278b8c10781d998cd5e24"> 45</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> ALEF = <span class="stringliteral">'\u0627'</span>;</div> |
| <div class="line"><a name="l00046"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_stemmer.html#ab46f87150f20dfda4dd62d3b3718d842"> 46</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> BEH = <span class="stringliteral">'\u0628'</span>;</div> |
| <div class="line"><a name="l00047"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_stemmer.html#a72172fc6ff78e43eb7cac85744eca68c"> 47</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> TEH_MARBUTA = <span class="stringliteral">'\u0629'</span>;</div> |
| <div class="line"><a name="l00048"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_stemmer.html#ae4884eeb8e3f5a80dbea24da05607371"> 48</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> TEH = <span class="stringliteral">'\u062A'</span>;</div> |
| <div class="line"><a name="l00049"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_stemmer.html#a9ed1fdbe918f8c9a959e05b9dc6ccd80"> 49</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> FEH = <span class="stringliteral">'\u0641'</span>;</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_stemmer.html#ab15a948b06e597bafd1f680fe2c5f708"> 50</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> KAF = <span class="stringliteral">'\u0643'</span>;</div> |
| <div class="line"><a name="l00051"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_stemmer.html#a3130004e185ddcbd944fbdcfcfd0df2c"> 51</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> LAM = <span class="stringliteral">'\u0644'</span>;</div> |
| <div class="line"><a name="l00052"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_stemmer.html#a46c8ea80702b66af907ae4069daf149a"> 52</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> NOON = <span class="stringliteral">'\u0646'</span>;</div> |
| <div class="line"><a name="l00053"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_stemmer.html#a056bb7a3436d0244ce937cca12bee818"> 53</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> HEH = <span class="stringliteral">'\u0647'</span>;</div> |
| <div class="line"><a name="l00054"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_stemmer.html#ae215a3a204e542e44c33bffad79e83fd"> 54</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> WAW = <span class="stringliteral">'\u0648'</span>;</div> |
| <div class="line"><a name="l00055"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_stemmer.html#a2d554a770b330414db9da69e122a26ff"> 55</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> YEH = <span class="stringliteral">'\u064A'</span>;</div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div> |
| <div class="line"><a name="l00057"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_stemmer.html#a1318b8adde5e65d3a10dcba321a02ed5"> 57</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> readonly <span class="keywordtype">char</span>[][] prefixes = {</div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  (<span class="stringliteral">""</span> + ALEF + LAM).ToCharArray(), </div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  (<span class="stringliteral">""</span> + WAW + ALEF + LAM).ToCharArray(), </div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  (<span class="stringliteral">""</span> + BEH + ALEF + LAM).ToCharArray(),</div> |
| <div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  (<span class="stringliteral">""</span> + KAF + ALEF + LAM).ToCharArray(),</div> |
| <div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  (<span class="stringliteral">""</span> + FEH + ALEF + LAM).ToCharArray(),</div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  (<span class="stringliteral">""</span> + LAM + LAM).ToCharArray(),</div> |
| <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  (<span class="stringliteral">""</span> + WAW).ToCharArray(),</div> |
| <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  };</div> |
| <div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div> |
| <div class="line"><a name="l00067"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_stemmer.html#ab01fbb90845d0793687c51089b860659"> 67</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> readonly <span class="keywordtype">char</span>[][] suffixes = {</div> |
| <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  (<span class="stringliteral">""</span> + HEH + ALEF).ToCharArray(), </div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  (<span class="stringliteral">""</span> + ALEF + NOON).ToCharArray(), </div> |
| <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  (<span class="stringliteral">""</span> + ALEF + TEH).ToCharArray(), </div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  (<span class="stringliteral">""</span> + WAW + NOON).ToCharArray(), </div> |
| <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  (<span class="stringliteral">""</span> + YEH + NOON).ToCharArray(), </div> |
| <div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  (<span class="stringliteral">""</span> + YEH + HEH).ToCharArray(),</div> |
| <div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  (<span class="stringliteral">""</span> + YEH + TEH_MARBUTA).ToCharArray(),</div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  (<span class="stringliteral">""</span> + HEH).ToCharArray(),</div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  (<span class="stringliteral">""</span> + TEH_MARBUTA).ToCharArray(),</div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  (<span class="stringliteral">""</span> + YEH).ToCharArray(),</div> |
| <div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  };</div> |
| <div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div> |
| <div class="line"><a name="l00080"></a><span class="lineno"> 80</span> </div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="comment">/*</span></div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment"> * Stem an input buffer of Arabic text.</span></div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment"> * </span></div> |
| <div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment"> * <param name="s">input buffer</param></span></div> |
| <div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment"> * <param name="len">length of input buffer</param></span></div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment"> * <returns>length of input buffer after normalization</returns></span></div> |
| <div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00088"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_stemmer.html#a757d7256c16d8ebfdb7fea2212448176"> 88</a></span>  <span class="keyword">public</span> <span class="keywordtype">int</span> Stem(<span class="keywordtype">char</span>[] s, <span class="keywordtype">int</span> len)</div> |
| <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  {</div> |
| <div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  len = StemPrefix(s, len);</div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  len = StemSuffix(s, len);</div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span> </div> |
| <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keywordflow">return</span> len;</div> |
| <div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  }</div> |
| <div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="comment">/*</span></div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment"> * Stem a prefix off an Arabic word.</span></div> |
| <div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment"> * <param name="s">input buffer</param></span></div> |
| <div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment"> * <param name="len">length of input buffer</param></span></div> |
| <div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment"> * <returns>new length of input buffer after stemming.</returns></span></div> |
| <div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00102"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_stemmer.html#ad5d8b2053aff633d675b5030e865a626"> 102</a></span>  <span class="keyword">public</span> <span class="keywordtype">int</span> StemPrefix(<span class="keywordtype">char</span>[] s, <span class="keywordtype">int</span> len)</div> |
| <div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  {</div> |
| <div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < prefixes.Length; i++)</div> |
| <div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordflow">if</span> (StartsWith(s, len, prefixes[i]))</div> |
| <div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordflow">return</span> DeleteN(s, 0, len, prefixes[i].Length);</div> |
| <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">return</span> len;</div> |
| <div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  }</div> |
| <div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div> |
| <div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="comment">/*</span></div> |
| <div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment"> * Stem suffix(es) off an Arabic word.</span></div> |
| <div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment"> * <param name="s">input buffer</param></span></div> |
| <div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment"> * <param name="len">length of input buffer</param></span></div> |
| <div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"> * <returns>new length of input buffer after stemming</returns></span></div> |
| <div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00116"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_stemmer.html#aa4aaf44d64ce46e35a0bd1b6eb78a657"> 116</a></span>  <span class="keyword">public</span> <span class="keywordtype">int</span> StemSuffix(<span class="keywordtype">char</span>[] s, <span class="keywordtype">int</span> len)</div> |
| <div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  {</div> |
| <div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < suffixes.Length; i++)</div> |
| <div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">if</span> (EndsWith(s, len, suffixes[i]))</div> |
| <div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  len = DeleteN(s, len - suffixes[i].Length, len, suffixes[i].Length);</div> |
| <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keywordflow">return</span> len;</div> |
| <div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  }</div> |
| <div class="line"><a name="l00123"></a><span class="lineno"> 123</span> </div> |
| <div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="comment">/*</span></div> |
| <div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="comment"> * Returns true if the prefix matches and can be stemmed</span></div> |
| <div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment"> * <param name="s">input buffer</param></span></div> |
| <div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="comment"> * <param name="len">length of input buffer</param></span></div> |
| <div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="comment"> * <param name="prefix">prefix to check</param></span></div> |
| <div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment"> * <returns>true if the prefix matches and can be stemmed</returns></span></div> |
| <div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordtype">bool</span> StartsWith(<span class="keywordtype">char</span>[] s, <span class="keywordtype">int</span> len, <span class="keywordtype">char</span>[] prefix)</div> |
| <div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  {</div> |
| <div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordflow">if</span> (prefix.Length == 1 && len < 4)</div> |
| <div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  { <span class="comment">// wa- prefix requires at least 3 characters</span></div> |
| <div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  }</div> |
| <div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (len < prefix.Length + 2)</div> |
| <div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  { <span class="comment">// other prefixes require only 2.</span></div> |
| <div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  }</div> |
| <div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">else</span></div> |
| <div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  {</div> |
| <div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < prefix.Length; i++)</div> |
| <div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keywordflow">if</span> (s[i] != prefix[i])</div> |
| <div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00146"></a><span class="lineno"> 146</span> </div> |
| <div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  }</div> |
| <div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  }</div> |
| <div class="line"><a name="l00150"></a><span class="lineno"> 150</span> </div> |
| <div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="comment">/*</span></div> |
| <div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="comment"> * Returns true if the suffix matches and can be stemmed</span></div> |
| <div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="comment"> * <param name="s">input buffer</param></span></div> |
| <div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="comment"> * <param name="len">length of input buffer</param></span></div> |
| <div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="comment"> * <param name="suffix">suffix to check</param></span></div> |
| <div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="comment"> * <returns>true if the suffix matches and can be stemmed</returns></span></div> |
| <div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keywordtype">bool</span> EndsWith(<span class="keywordtype">char</span>[] s, <span class="keywordtype">int</span> len, <span class="keywordtype">char</span>[] suffix)</div> |
| <div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  {</div> |
| <div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keywordflow">if</span> (len < suffix.Length + 2)</div> |
| <div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  { <span class="comment">// all suffixes require at least 2 characters after stemming</span></div> |
| <div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  }</div> |
| <div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordflow">else</span></div> |
| <div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  {</div> |
| <div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < suffix.Length; i++)</div> |
| <div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keywordflow">if</span> (s[len - suffix.Length + i] != suffix[i])</div> |
| <div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00169"></a><span class="lineno"> 169</span> </div> |
| <div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  }</div> |
| <div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  }</div> |
| <div class="line"><a name="l00173"></a><span class="lineno"> 173</span> </div> |
| <div class="line"><a name="l00174"></a><span class="lineno"> 174</span> </div> |
| <div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="comment">/*</span></div> |
| <div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="comment"> * Delete n characters in-place</span></div> |
| <div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="comment"> * </span></div> |
| <div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="comment"> * <param name="s">Input Buffer</param></span></div> |
| <div class="line"><a name="l00179"></a><span class="lineno"> 179</span> <span class="comment"> * <param name="pos">Position of character to delete</param></span></div> |
| <div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="comment"> * <param name="len">Length of input buffer</param></span></div> |
| <div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="comment"> * <param name="nChars">number of characters to delete</param></span></div> |
| <div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="comment"> * <returns>length of input buffer after deletion</returns></span></div> |
| <div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="comment"> */</span></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_a_r_1_1_arabic_stemmer.html#ab6fcf167bd3860699e1593ca1cd2be43"> 184</a></span>  <span class="keyword">protected</span> <span class="keywordtype">int</span> DeleteN(<span class="keywordtype">char</span>[] s, <span class="keywordtype">int</span> pos, <span class="keywordtype">int</span> len, <span class="keywordtype">int</span> nChars)</div> |
| <div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  {</div> |
| <div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < nChars; i++)</div> |
| <div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  len = Delete(s, pos, len);</div> |
| <div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="keywordflow">return</span> len;</div> |
| <div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  }</div> |
| <div class="line"><a name="l00190"></a><span class="lineno"> 190</span> </div> |
| <div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="comment">/*</span></div> |
| <div class="line"><a name="l00192"></a><span class="lineno"> 192</span> <span class="comment"> * Delete a character in-place</span></div> |
| <div class="line"><a name="l00193"></a><span class="lineno"> 193</span> <span class="comment"> * </span></div> |
| <div class="line"><a name="l00194"></a><span class="lineno"> 194</span> <span class="comment"> * <param name="s">Input Buffer</param></span></div> |
| <div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="comment"> * <param name="pos">Position of character to delete</param></span></div> |
| <div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="comment"> * <param name="len">length of input buffer</param></span></div> |
| <div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="comment"> * <returns>length of input buffer after deletion</returns></span></div> |
| <div class="line"><a name="l00198"></a><span class="lineno"> 198</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00199"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_stemmer.html#a197e1c72460ed7b14f9bcf04245a3a25"> 199</a></span>  <span class="keyword">protected</span> <span class="keywordtype">int</span> Delete(<span class="keywordtype">char</span>[] s, <span class="keywordtype">int</span> pos, <span class="keywordtype">int</span> len)</div> |
| <div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  {</div> |
| <div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="keywordflow">if</span> (pos < len)</div> |
| <div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  Array.Copy(s, pos + 1, s, pos, len - pos - 1); </div> |
| <div class="line"><a name="l00203"></a><span class="lineno"> 203</span> </div> |
| <div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="keywordflow">return</span> len - 1;</div> |
| <div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  }</div> |
| <div class="line"><a name="l00206"></a><span class="lineno"> 206</span> </div> |
| <div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  }</div> |
| <div class="line"><a name="l00208"></a><span class="lineno"> 208</span> }</div> |
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