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| <a href="_arabic_normalizer_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>  <span class="comment">/*</span></div> |
| <div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> * Normalizer for Arabic.</span></div> |
| <div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> * <p/></span></div> |
| <div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> * Normalization is done in-place for efficiency, operating on a termbuffer.</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"> * Normalization is defined as:</span></div> |
| <div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> * <ul></span></div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"> * <li> Normalization of hamza with alef seat to a bare alef.</li></span></div> |
| <div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> * <li> Normalization of teh marbuta to heh</li></span></div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> * <li> Normalization of dotless yeh (alef maksura) to yeh.</li></span></div> |
| <div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> * <li> Removal of Arabic diacritics (the harakat)</li></span></div> |
| <div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> * <li> Removal of tatweel (stretching character).</li></span></div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> * </ul></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"> 43</span> <span class="comment"> */</span></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_a_r_1_1_arabic_normalizer.html"> 44</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_normalizer.html">ArabicNormalizer</a></div> |
| <div class="line"><a name="l00045"></a><span class="lineno"> 45</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_normalizer.html#a6d769e88e3c724518308acbe5e2d5a9d"> 46</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="l00047"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_normalizer.html#a27f086a00e9683b1f9fd419fce265ba9"> 47</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> ALEF_MADDA = <span class="stringliteral">'\u0622'</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_normalizer.html#a57b2ba715dc65fa424da4f6c73b95626"> 48</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> ALEF_HAMZA_ABOVE = <span class="stringliteral">'\u0623'</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_normalizer.html#aaf42dbe1e243d15058851467b6343246"> 49</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> ALEF_HAMZA_BELOW = <span class="stringliteral">'\u0625'</span>;</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</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_normalizer.html#a5f02ca69305b71e2d6b5180840d7b39e"> 51</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="l00052"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_normalizer.html#ab9febe8885d335c474b3dae749c6ff7c"> 52</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> DOTLESS_YEH = <span class="stringliteral">'\u0649'</span>;</div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</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_normalizer.html#a7aa1d5622db76022b3b4e9df6a4b614a"> 54</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="l00055"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_normalizer.html#a7d587d68a457523b5af62420cf71da88"> 55</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="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_normalizer.html#ac784ef5803fec8d2aa0568a89e1090a4"> 57</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> TATWEEL = <span class="stringliteral">'\u0640'</span>;</div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div> |
| <div class="line"><a name="l00059"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_normalizer.html#a1a39af2a16594d86d6b297083a2f45fa"> 59</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> FATHATAN = <span class="stringliteral">'\u064B'</span>;</div> |
| <div class="line"><a name="l00060"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_normalizer.html#a3b67013eb22469734c2664f340a27c62"> 60</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> DAMMATAN = <span class="stringliteral">'\u064C'</span>;</div> |
| <div class="line"><a name="l00061"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_normalizer.html#a67cc8e78008c02ac92b62c4332739fc1"> 61</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> KASRATAN = <span class="stringliteral">'\u064D'</span>;</div> |
| <div class="line"><a name="l00062"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_normalizer.html#a555e8048e8180c797ac2ce1b33a85553"> 62</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> FATHA = <span class="stringliteral">'\u064E'</span>;</div> |
| <div class="line"><a name="l00063"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_normalizer.html#aed814b9aba5347d780b3ffc606f589f8"> 63</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> DAMMA = <span class="stringliteral">'\u064F'</span>;</div> |
| <div class="line"><a name="l00064"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_normalizer.html#a6d3b7b1fc9fc0a71345dbc35d3ff7190"> 64</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> KASRA = <span class="stringliteral">'\u0650'</span>;</div> |
| <div class="line"><a name="l00065"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_normalizer.html#ad4e71a80efed439cb3bea1b43ac24824"> 65</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> SHADDA = <span class="stringliteral">'\u0651'</span>;</div> |
| <div class="line"><a name="l00066"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_normalizer.html#a20201a12b12607edea50d592eea140d9"> 66</a></span>  <span class="keyword">public</span> <span class="keyword">const</span> <span class="keywordtype">char</span> SUKUN = <span class="stringliteral">'\u0652'</span>;</div> |
| <div class="line"><a name="l00067"></a><span class="lineno"> 67</span> </div> |
| <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="comment">/*</span></div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"> * Normalize an input buffer of Arabic text</span></div> |
| <div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment"> * </span></div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"> * <param name="s">input buffer</param></span></div> |
| <div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"> * <param name="len">length of input buffer</param></span></div> |
| <div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment"> * <returns>length of input buffer after normalization</returns></span></div> |
| <div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00075"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_normalizer.html#aa925f16f8f40b1cd9ac291c29ffe9cdf"> 75</a></span>  <span class="keyword">public</span> <span class="keywordtype">int</span> Normalize(<span class="keywordtype">char</span>[] s, <span class="keywordtype">int</span> len)</div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  {</div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</span> </div> |
| <div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < len; i++)</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>  <span class="keywordflow">switch</span> (s[i])</div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  {</div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">case</span> ALEF_MADDA:</div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <span class="keywordflow">case</span> ALEF_HAMZA_ABOVE:</div> |
| <div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">case</span> ALEF_HAMZA_BELOW:</div> |
| <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  s[i] = ALEF;</div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordflow">break</span>;</div> |
| <div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordflow">case</span> DOTLESS_YEH:</div> |
| <div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  s[i] = YEH;</div> |
| <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">break</span>;</div> |
| <div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordflow">case</span> TEH_MARBUTA:</div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  s[i] = HEH;</div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">break</span>;</div> |
| <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keywordflow">case</span> TATWEEL:</div> |
| <div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordflow">case</span> KASRATAN:</div> |
| <div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordflow">case</span> DAMMATAN:</div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordflow">case</span> FATHATAN:</div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordflow">case</span> FATHA:</div> |
| <div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordflow">case</span> DAMMA:</div> |
| <div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordflow">case</span> KASRA:</div> |
| <div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordflow">case</span> SHADDA:</div> |
| <div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">case</span> SUKUN:</div> |
| <div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  len = Delete(s, i, len);</div> |
| <div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  i--;</div> |
| <div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordflow">break</span>;</div> |
| <div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordflow">default</span>:</div> |
| <div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordflow">break</span>;</div> |
| <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  }</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="keywordflow">return</span> len;</div> |
| <div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  }</div> |
| <div class="line"><a name="l00112"></a><span class="lineno"> 112</span> </div> |
| <div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="comment">/*</span></div> |
| <div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"> * Delete a character in-place</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"> 116</span> <span class="comment"> * <param name="s">Input Buffer</param></span></div> |
| <div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment"> * <param name="pos">Position of character to delete</param></span></div> |
| <div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment"> * <param name="len">length of input buffer</param></span></div> |
| <div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment"> * <returns>length of input buffer after deletion</returns></span></div> |
| <div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00121"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_analysis_1_1_a_r_1_1_arabic_normalizer.html#a31759cb7ed5f34f7756ad86208375d2e"> 121</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="l00122"></a><span class="lineno"> 122</span>  {</div> |
| <div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordflow">if</span> (pos < len)</div> |
| <div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  Array.Copy(s, pos + 1, s, pos, len - pos - 1); </div> |
| <div class="line"><a name="l00125"></a><span class="lineno"> 125</span> </div> |
| <div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <span class="keywordflow">return</span> len - 1;</div> |
| <div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  }</div> |
| <div class="line"><a name="l00128"></a><span class="lineno"> 128</span> </div> |
| <div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  }</div> |
| <div class="line"><a name="l00130"></a><span class="lineno"> 130</span> }</div> |
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