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|  <span id="projectnumber">3.0.3</span> |
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| <div class="title">DefaultSkipListReader.cs</div> </div> |
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| <a href="_default_skip_list_reader_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> Lucene.Net.Support;</div> |
| <div class="line"><a name="l00019"></a><span class="lineno"><a class="code" href="_default_skip_list_reader_8cs.html#a12195e9150e4d7af469b90ac95cc47ee"> 19</a></span> <span class="keyword">using</span> <a class="code" href="_byte_slice_reader_8cs.html#a12195e9150e4d7af469b90ac95cc47ee">IndexInput</a> = Lucene.Net.Store.IndexInput;</div> |
| <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">namespace </span>Lucene.Net.Index</div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> {</div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  </div> |
| <div class="line"><a name="l00028"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_index_1_1_default_skip_list_reader.html"> 28</a></span>  <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_index_1_1_default_skip_list_reader.html" title="Implements the skip list reader for the default posting list format that stores positions and payload...">DefaultSkipListReader</a>:<a class="code" href="class_lucene_1_1_net_1_1_index_1_1_multi_level_skip_list_reader.html" title="This abstract class reads skip lists with multiple levels.">MultiLevelSkipListReader</a></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>  <span class="keyword">private</span> <span class="keywordtype">bool</span> currentFieldStoresPayloads;</div> |
| <div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keyword">private</span> readonly <span class="keywordtype">long</span>[] freqPointer;</div> |
| <div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keyword">private</span> readonly <span class="keywordtype">long</span>[] proxPointer;</div> |
| <div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keyword">private</span> readonly <span class="keywordtype">int</span>[] payloadLength;</div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  </div> |
| <div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keyword">private</span> <span class="keywordtype">long</span> lastFreqPointer;</div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="keyword">private</span> <span class="keywordtype">long</span> lastProxPointer;</div> |
| <div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keyword">private</span> <span class="keywordtype">int</span> lastPayloadLength;</div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  </div> |
| <div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  </div> |
| <div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="keyword">internal</span> <a class="code" href="class_lucene_1_1_net_1_1_index_1_1_default_skip_list_reader.html" title="Implements the skip list reader for the default posting list format that stores positions and payload...">DefaultSkipListReader</a>(<a class="code" href="_byte_slice_reader_8cs.html#a12195e9150e4d7af469b90ac95cc47ee">IndexInput</a> skipStream, <span class="keywordtype">int</span> maxSkipLevels, <span class="keywordtype">int</span> skipInterval):base(skipStream, maxSkipLevels, skipInterval)</div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  {</div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  freqPointer = <span class="keyword">new</span> <span class="keywordtype">long</span>[maxSkipLevels];</div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  proxPointer = <span class="keyword">new</span> <span class="keywordtype">long</span>[maxSkipLevels];</div> |
| <div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  payloadLength = <span class="keyword">new</span> <span class="keywordtype">int</span>[maxSkipLevels];</div> |
| <div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  }</div> |
| <div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  </div> |
| <div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keyword">internal</span> <span class="keyword">virtual</span> <span class="keywordtype">void</span> Init(<span class="keywordtype">long</span> skipPointer, <span class="keywordtype">long</span> freqBasePointer, <span class="keywordtype">long</span> proxBasePointer, <span class="keywordtype">int</span> df, <span class="keywordtype">bool</span> storesPayloads)</div> |
| <div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  {</div> |
| <div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  base.Init(skipPointer, df);</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  this.currentFieldStoresPayloads = storesPayloads;</div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  lastFreqPointer = freqBasePointer;</div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  lastProxPointer = proxBasePointer;</div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span> </div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < freqPointer.Length; i++) freqPointer[i] = freqBasePointer;</div> |
| <div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < proxPointer.Length; i++) proxPointer[i] = proxBasePointer;</div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < payloadLength.Length; i++) payloadLength[i] = 0;</div> |
| <div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  }</div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  </div> |
| <div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keyword">internal</span> <span class="keyword">virtual</span> <span class="keywordtype">long</span> GetFreqPointer()</div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  {</div> |
| <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">return</span> lastFreqPointer;</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="l00070"></a><span class="lineno"> 70</span>  <span class="keyword">internal</span> <span class="keyword">virtual</span> <span class="keywordtype">long</span> GetProxPointer()</div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  {</div> |
| <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordflow">return</span> lastProxPointer;</div> |
| <div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  }</div> |
| <div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  </div> |
| <div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keyword">internal</span> <span class="keyword">virtual</span> <span class="keywordtype">int</span> GetPayloadLength()</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="keywordflow">return</span> lastPayloadLength;</div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  }</div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  </div> |
| <div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keyword">protected</span> <span class="keyword">internal</span> <span class="keyword">override</span> <span class="keywordtype">void</span> SeekChild(<span class="keywordtype">int</span> level)</div> |
| <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  {</div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  base.SeekChild(level);</div> |
| <div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  freqPointer[level] = lastFreqPointer;</div> |
| <div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  proxPointer[level] = lastProxPointer;</div> |
| <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  payloadLength[level] = lastPayloadLength;</div> |
| <div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  }</div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  </div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keyword">protected</span> <span class="keyword">internal</span> <span class="keyword">override</span> <span class="keywordtype">void</span> SetLastSkipData(<span class="keywordtype">int</span> level)</div> |
| <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  {</div> |
| <div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  base.SetLastSkipData(level);</div> |
| <div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  lastFreqPointer = freqPointer[level];</div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  lastProxPointer = proxPointer[level];</div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  lastPayloadLength = payloadLength[level];</div> |
| <div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  }</div> |
| <div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  </div> |
| <div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  </div> |
| <div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keyword">protected</span> <span class="keyword">internal</span> <span class="keyword">override</span> <span class="keywordtype">int</span> ReadSkipData(<span class="keywordtype">int</span> level, <a class="code" href="_byte_slice_reader_8cs.html#a12195e9150e4d7af469b90ac95cc47ee">IndexInput</a> skipStream)</div> |
| <div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  {</div> |
| <div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordtype">int</span> delta;</div> |
| <div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordflow">if</span> (currentFieldStoresPayloads)</div> |
| <div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  {</div> |
| <div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="comment">// the current field stores payloads.</span></div> |
| <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="comment">// if the doc delta is odd then we have</span></div> |
| <div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="comment">// to read the current payload length</span></div> |
| <div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="comment">// because it differs from the length of the</span></div> |
| <div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="comment">// previous payload</span></div> |
| <div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  delta = skipStream.ReadVInt();</div> |
| <div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">if</span> ((delta & 1) != 0)</div> |
| <div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  {</div> |
| <div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  payloadLength[level] = skipStream.ReadVInt();</div> |
| <div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  }</div> |
| <div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  delta = <a class="code" href="class_lucene_1_1_net_1_1_support_1_1_number.html" title="A simple class for number conversions. ">Number</a>.<a class="code" href="class_lucene_1_1_net_1_1_support_1_1_number.html#aafe44e2acf7feacad6abd2a425730644" title="Performs an unsigned bitwise right shift with the specified number ">URShift</a>(delta, 1);</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">else</span></div> |
| <div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  {</div> |
| <div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  delta = skipStream.ReadVInt();</div> |
| <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  }</div> |
| <div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  freqPointer[level] += skipStream.ReadVInt();</div> |
| <div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  proxPointer[level] += skipStream.ReadVInt();</div> |
| <div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  </div> |
| <div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keywordflow">return</span> delta;</div> |
| <div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  }</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> |
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