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| <div class="title">FastCharStream.cs</div> </div> |
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| <a href="_fast_char_stream_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="comment">// FastCharStream.java</span></div> |
| <div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div> |
| <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="keyword">using</span> System;</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">namespace </span>Lucene.Net.QueryParsers</div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> {</div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  </div> |
| <div class="line"><a name="l00031"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_query_parsers_1_1_fast_char_stream.html"> 31</a></span>  <span class="keyword">public</span> sealed <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_query_parsers_1_1_fast_char_stream.html" title="An efficient implementation of JavaCC's CharStream interface. Note that this does not do line-number ...">FastCharStream</a> : <a class="code" href="interface_lucene_1_1_net_1_1_query_parsers_1_1_i_char_stream.html" title="This interface describes a character stream that maintains line and column number positions of the ch...">ICharStream</a></div> |
| <div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  {</div> |
| <div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keyword">internal</span> <span class="keywordtype">char</span>[] buffer = null;</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">internal</span> <span class="keywordtype">int</span> bufferLength = 0; <span class="comment">// end of valid chars</span></div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="keyword">internal</span> <span class="keywordtype">int</span> bufferPosition = 0; <span class="comment">// next char to read</span></div> |
| <div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  </div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keyword">internal</span> <span class="keywordtype">int</span> tokenStart = 0; <span class="comment">// offset in buffer</span></div> |
| <div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keyword">internal</span> <span class="keywordtype">int</span> bufferStart = 0; <span class="comment">// position in file of buffer</span></div> |
| <div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  </div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keyword">internal</span> System.IO.TextReader input; <span class="comment">// source of chars</span></div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  </div> |
| <div class="line"><a name="l00044"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_query_parsers_1_1_fast_char_stream.html#ad38a213fb04546746c901baa7b45f160"> 44</a></span>  <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_query_parsers_1_1_fast_char_stream.html" title="An efficient implementation of JavaCC's CharStream interface. Note that this does not do line-number ...">FastCharStream</a>(System.IO.TextReader r)</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>  input = r;</div> |
| <div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  }</div> |
| <div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  </div> |
| <div class="line"><a name="l00049"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_query_parsers_1_1_fast_char_stream.html#a70e53d6f61fef3c374bda81b3d9ccef6"> 49</a></span>  <span class="keyword">public</span> <span class="keywordtype">char</span> ReadChar()</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  {</div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordflow">if</span> (bufferPosition >= bufferLength)</div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  Refill();</div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">return</span> buffer[bufferPosition++];</div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  }</div> |
| <div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  </div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="keyword">private</span> <span class="keywordtype">void</span> Refill()</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>  <span class="keywordtype">int</span> newPosition = bufferLength - tokenStart;</div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  </div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keywordflow">if</span> (tokenStart == 0)</div> |
| <div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  {</div> |
| <div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="comment">// token won't fit in buffer</span></div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">if</span> (buffer == null)</div> |
| <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  {</div> |
| <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="comment">// first time: alloc buffer</span></div> |
| <div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  buffer = <span class="keyword">new</span> <span class="keywordtype">char</span>[2048];</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="keywordflow">else</span> <span class="keywordflow">if</span> (bufferLength == buffer.Length)</div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  {</div> |
| <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="comment">// grow buffer</span></div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordtype">char</span>[] newBuffer = <span class="keyword">new</span> <span class="keywordtype">char</span>[buffer.Length * 2];</div> |
| <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  Array.Copy(buffer, 0, newBuffer, 0, bufferLength);</div> |
| <div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  buffer = newBuffer;</div> |
| <div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  }</div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  }</div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordflow">else</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="comment">// shift token to front</span></div> |
| <div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  Array.Copy(buffer, tokenStart, buffer, 0, newPosition);</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>  </div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  bufferLength = newPosition; <span class="comment">// update state</span></div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  bufferPosition = newPosition;</div> |
| <div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  bufferStart += tokenStart;</div> |
| <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  tokenStart = 0;</div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  </div> |
| <div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordtype">int</span> charsRead = input.Read(buffer, newPosition, buffer.Length - newPosition);</div> |
| <div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">if</span> (charsRead <= 0)</div> |
| <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">throw</span> <span class="keyword">new</span> System.IO.IOException(<span class="stringliteral">"read past eof"</span>);</div> |
| <div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordflow">else</span></div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  bufferLength += charsRead;</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>  </div> |
| <div class="line"><a name="l00094"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_query_parsers_1_1_fast_char_stream.html#a1285984b33fc6842c57372f465a4d184"> 94</a></span>  <span class="keyword">public</span> <span class="keywordtype">char</span> BeginToken()</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>  tokenStart = bufferPosition;</div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordflow">return</span> ReadChar();</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"><a class="code" href="class_lucene_1_1_net_1_1_query_parsers_1_1_fast_char_stream.html#ab6dacd91f3d90577920ad5ba53c0d3cb"> 100</a></span>  <span class="keyword">public</span> <span class="keywordtype">void</span> Backup(<span class="keywordtype">int</span> amount)</div> |
| <div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  {</div> |
| <div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  bufferPosition -= amount;</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> </div> |
| <div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keyword">public</span> <span class="keywordtype">string</span> Image</div> |
| <div class="line"><a name="l00106"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_query_parsers_1_1_fast_char_stream.html#a818d58b1e38dde1d0294765013b0ecf7"> 106</a></span>  {</div> |
| <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> <span class="keyword">new</span> System.String(buffer, tokenStart, bufferPosition - tokenStart); }</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"><a class="code" href="class_lucene_1_1_net_1_1_query_parsers_1_1_fast_char_stream.html#a942ddfa6f81cf6667808c28d6bcc09da"> 110</a></span>  <span class="keyword">public</span> <span class="keywordtype">char</span>[] GetSuffix(<span class="keywordtype">int</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>  <span class="keywordtype">char</span>[] value_Renamed = <span class="keyword">new</span> <span class="keywordtype">char</span>[len];</div> |
| <div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  Array.Copy(buffer, bufferPosition - len, value_Renamed, 0, len);</div> |
| <div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keywordflow">return</span> value_Renamed;</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>  </div> |
| <div class="line"><a name="l00117"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_query_parsers_1_1_fast_char_stream.html#a1992fe087b99d12448f95fbe2907c988"> 117</a></span>  <span class="keyword">public</span> <span class="keywordtype">void</span> Done()</div> |
| <div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  {</div> |
| <div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">try</span></div> |
| <div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  {</div> |
| <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  input.Close();</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">catch</span> (System.IO.IOException e)</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>  System.Console.Error.WriteLine(<span class="stringliteral">"Caught: "</span> + e + <span class="stringliteral">"; ignoring."</span>);</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> |
| <div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keyword">public</span> <span class="keywordtype">int</span> Column</div> |
| <div class="line"><a name="l00130"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_query_parsers_1_1_fast_char_stream.html#adffe2aa07ef73feb0f8ab8fc87ffc7f0"> 130</a></span>  {</div> |
| <div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> bufferStart + bufferPosition; }</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> </div> |
| <div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keyword">public</span> <span class="keywordtype">int</span> Line</div> |
| <div class="line"><a name="l00135"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_query_parsers_1_1_fast_char_stream.html#ab620c095e820c5c9ca0bc2da75c8176e"> 135</a></span>  {</div> |
| <div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> 1; }</div> |
| <div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  }</div> |
| <div class="line"><a name="l00138"></a><span class="lineno"> 138</span> </div> |
| <div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keyword">public</span> <span class="keywordtype">int</span> EndColumn</div> |
| <div class="line"><a name="l00140"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_query_parsers_1_1_fast_char_stream.html#abdcc5ed2d50d95b80121d441168499a8"> 140</a></span>  {</div> |
| <div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> bufferStart + bufferPosition; }</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> </div> |
| <div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keyword">public</span> <span class="keywordtype">int</span> EndLine</div> |
| <div class="line"><a name="l00145"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_query_parsers_1_1_fast_char_stream.html#aa64b884b62b38192151e69f00b333ace"> 145</a></span>  {</div> |
| <div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> 1; }</div> |
| <div class="line"><a name="l00147"></a><span class="lineno"> 147</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>  <span class="keyword">public</span> <span class="keywordtype">int</span> BeginColumn</div> |
| <div class="line"><a name="l00150"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_query_parsers_1_1_fast_char_stream.html#a42932cf6d68318bf05b7ff57dbb34598"> 150</a></span>  {</div> |
| <div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> bufferStart + tokenStart; }</div> |
| <div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  }</div> |
| <div class="line"><a name="l00153"></a><span class="lineno"> 153</span> </div> |
| <div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keyword">public</span> <span class="keywordtype">int</span> BeginLine</div> |
| <div class="line"><a name="l00155"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_query_parsers_1_1_fast_char_stream.html#a868fa9a261b569cf72e8a583dc3bf900"> 155</a></span>  {</div> |
| <div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="keyword">get</span> { <span class="keywordflow">return</span> 1; }</div> |
| <div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  }</div> |
| <div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  }</div> |
| <div class="line"><a name="l00159"></a><span class="lineno"> 159</span> }</div> |
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