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<li class="navelem"><a class="el" href="dir_1efe588324fc547683bba4a3f1bac847.html">core</a></li><li class="navelem"><a class="el" href="dir_508bd2a9867f606940156debe4946ca8.html">Index</a></li> </ul>
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<div class="title">CompoundFileWriter.cs</div> </div>
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<a href="_compound_file_writer_8cs.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">/* </span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment"> * 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>&#160;<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>&#160;<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>&#160;<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>&#160;<span class="comment"> * (the &quot;License&quot;); you may not use this file except in compliance with</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<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>&#160;<span class="comment"> * </span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<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>&#160;<span class="comment"> * </span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<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>&#160;<span class="comment"> * distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<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>&#160;<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>&#160;<span class="comment"> * limitations under the License.</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="keyword">using</span> System;</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="keyword">using</span> System.Collections.Generic;</div>
<div class="line"><a name="l00020"></a><span class="lineno"><a class="code" href="_compound_file_writer_8cs.html#ac7fdd4fc5daf7ce3e6be563664f8bf64"> 20</a></span>&#160;<span class="keyword">using</span> <a class="code" href="_syns2_index_8cs.html#aada057080323f6e867d8f9c189276716">Directory</a> = Lucene.Net.Store.Directory;</div>
<div class="line"><a name="l00021"></a><span class="lineno"><a class="code" href="_compound_file_writer_8cs.html#a12195e9150e4d7af469b90ac95cc47ee"> 21</a></span>&#160;<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="l00022"></a><span class="lineno"><a class="code" href="_compound_file_writer_8cs.html#ade6c9dd9318ff9ca227f26d89b0ad2e5"> 22</a></span>&#160;<span class="keyword">using</span> <a class="code" href="_byte_slice_reader_8cs.html#ade6c9dd9318ff9ca227f26d89b0ad2e5">IndexOutput</a> = Lucene.Net.Store.IndexOutput;</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="keyword">namespace </span>Lucene.Net.Index</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;{</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160; </div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160; </div>
<div class="line"><a name="l00047"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_index_1_1_compound_file_writer.html"> 47</a></span>&#160; <span class="keyword">public</span> sealed <span class="keyword">class </span><a class="code" href="class_lucene_1_1_net_1_1_index_1_1_compound_file_writer.html" title="Combines multiple files into a single compound file. The file format: VInt fileCount {Directory} fil...">CompoundFileWriter</a> : IDisposable</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; {</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; </div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; <span class="keyword">private</span> sealed <span class="keyword">class </span>FileEntry</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; {</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <span class="keyword">internal</span> System.String file;</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; </div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; <span class="keyword">internal</span> <span class="keywordtype">long</span> directoryOffset;</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; </div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; <span class="keyword">internal</span> <span class="keywordtype">long</span> dataOffset;</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; }</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; </div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; </div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; <span class="keyword">private</span> readonly <a class="code" href="_syns2_index_8cs.html#aada057080323f6e867d8f9c189276716">Directory</a> directory;</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; <span class="keyword">private</span> readonly String fileName;</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; <span class="keyword">private</span> readonly HashSet&lt;string&gt; ids;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160; <span class="keyword">private</span> readonly LinkedList&lt;FileEntry&gt; entries;</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160; <span class="keyword">private</span> <span class="keywordtype">bool</span> merged = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160; <span class="keyword">private</span> readonly <a class="code" href="class_lucene_1_1_net_1_1_index_1_1_segment_merger.html" title="The SegmentMerger class combines two or more Segments, represented by an IndexReader (Add...">SegmentMerger</a>.CheckAbort checkAbort;</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160; </div>
<div class="line"><a name="l00074"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_index_1_1_compound_file_writer.html#a423d15af6e923e65fe01239e3d6ea375"> 74</a></span>&#160; <span class="keyword">public</span> <a class="code" href="class_lucene_1_1_net_1_1_index_1_1_compound_file_writer.html" title="Combines multiple files into a single compound file. The file format: VInt fileCount {Directory} fil...">CompoundFileWriter</a>(<a class="code" href="_syns2_index_8cs.html#aada057080323f6e867d8f9c189276716">Directory</a> dir, System.String name):this(dir, name, null)</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; {</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; }</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160; </div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; <span class="keyword">internal</span> <a class="code" href="class_lucene_1_1_net_1_1_index_1_1_compound_file_writer.html" title="Combines multiple files into a single compound file. The file format: VInt fileCount {Directory} fil...">CompoundFileWriter</a>(<a class="code" href="_syns2_index_8cs.html#aada057080323f6e867d8f9c189276716">Directory</a> dir, System.String name, <a class="code" href="class_lucene_1_1_net_1_1_index_1_1_segment_merger.html" title="The SegmentMerger class combines two or more Segments, represented by an IndexReader (Add...">SegmentMerger</a>.CheckAbort checkAbort)</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160; {</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>&#160; <span class="keywordflow">if</span> (dir == null)</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> ArgumentNullException(<span class="stringliteral">&quot;dir&quot;</span>);</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; <span class="keywordflow">if</span> (name == null)</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> ArgumentNullException(<span class="stringliteral">&quot;name&quot;</span>);</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; this.checkAbort = checkAbort;</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; directory = dir;</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; fileName = name;</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; ids = <span class="keyword">new</span> HashSet&lt;string&gt;();</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; entries = <span class="keyword">new</span> LinkedList&lt;FileEntry&gt;();</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; }</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160;</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; <span class="keyword">public</span> <a class="code" href="_syns2_index_8cs.html#aada057080323f6e867d8f9c189276716">Directory</a> <a class="code" href="_syns2_index_8cs.html#aada057080323f6e867d8f9c189276716">Directory</a></div>
<div class="line"><a name="l00093"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_index_1_1_compound_file_writer.html#a9dcde5a7217e7eaf2e2f59c012047144"> 93</a></span>&#160; {</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; <span class="keyword">get</span> { <span class="keywordflow">return</span> directory; }</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; }</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160;</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; <span class="keyword">public</span> <span class="keywordtype">string</span> Name</div>
<div class="line"><a name="l00099"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_index_1_1_compound_file_writer.html#a3f4d6fceb9dd0b3da7730fcc1cbfc423"> 99</a></span>&#160; {</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; <span class="keyword">get</span> { <span class="keywordflow">return</span> fileName; }</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; }</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160;</div>
<div class="line"><a name="l00112"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_index_1_1_compound_file_writer.html#ab5b2cdef99143f3acae3b0e89ddbfe7d"> 112</a></span>&#160; <span class="keyword">public</span> <span class="keywordtype">void</span> AddFile(String file)</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160; {</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; <span class="keywordflow">if</span> (merged)</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> InvalidOperationException(<span class="stringliteral">&quot;Can&#39;t add extensions after merge has been called&quot;</span>);</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160; </div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; <span class="keywordflow">if</span> (file == null)</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> ArgumentNullException(<span class="stringliteral">&quot;file&quot;</span>);</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; </div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160; <span class="keywordflow">try</span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160; {</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160; ids.Add(file);</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160; }</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; <span class="keywordflow">catch</span> (Exception)</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160; {</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> ArgumentException(<span class="stringliteral">&quot;File &quot;</span> + file + <span class="stringliteral">&quot; already added&quot;</span>);</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; }</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160;</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160; var entry = <span class="keyword">new</span> FileEntry {file = file};</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160; entries.AddLast(entry);</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160; }</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>&#160; </div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>&#160; [Obsolete(<span class="stringliteral">&quot;Use Dispose() instead&quot;</span>)]</div>
<div class="line"><a name="l00134"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_index_1_1_compound_file_writer.html#a55c24a06766c87b2057792695a6cedf0"> 134</a></span>&#160; <span class="keyword">public</span> <span class="keywordtype">void</span> Close()</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>&#160; {</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>&#160; Dispose();</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>&#160; }</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>&#160;</div>
<div class="line"><a name="l00147"></a><span class="lineno"><a class="code" href="class_lucene_1_1_net_1_1_index_1_1_compound_file_writer.html#ada2da4d04486a4037c08c0e27ab57d10"> 147</a></span>&#160; <span class="keyword">public</span> <span class="keywordtype">void</span> Dispose()</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>&#160; {</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>&#160; <span class="comment">// Extract into protected method if class ever becomes unsealed</span></div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>&#160;</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>&#160; <span class="comment">// TODO: Dispose shouldn&#39;t throw exceptions!</span></div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>&#160; <span class="keywordflow">if</span> (merged)</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> SystemException(<span class="stringliteral">&quot;Merge already performed&quot;</span>);</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>&#160;</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>&#160; <span class="keywordflow">if</span> ((entries.Count == 0))</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> SystemException(<span class="stringliteral">&quot;No entries to merge have been defined&quot;</span>);</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>&#160;</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>&#160; merged = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>&#160;</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>&#160; <span class="comment">// open the compound stream</span></div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>&#160; <a class="code" href="_byte_slice_reader_8cs.html#ade6c9dd9318ff9ca227f26d89b0ad2e5">IndexOutput</a> os = null;</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>&#160; <span class="keywordflow">try</span></div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>&#160; {</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>&#160; os = directory.CreateOutput(fileName);</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>&#160;</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>&#160; <span class="comment">// Write the number of entries</span></div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>&#160; os.WriteVInt(entries.Count);</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>&#160;</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>&#160; <span class="comment">// Write the directory with all offsets at 0.</span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>&#160; <span class="comment">// Remember the positions of directory entries so that we can</span></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>&#160; <span class="comment">// adjust the offsets later</span></div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>&#160; <span class="keywordtype">long</span> totalSize = 0;</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>&#160; <span class="keywordflow">foreach</span> (FileEntry fe <span class="keywordflow">in</span> entries)</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>&#160; {</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>&#160; fe.directoryOffset = os.FilePointer;</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>&#160; os.WriteLong(0); <span class="comment">// for now</span></div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>&#160; os.WriteString(fe.file);</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>&#160; totalSize += directory.FileLength(fe.file);</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>&#160; }</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>&#160;</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>&#160; <span class="comment">// Pre-allocate size of file as optimization --</span></div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>&#160; <span class="comment">// this can potentially help IO performance as</span></div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>&#160; <span class="comment">// we write the file and also later during</span></div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>&#160; <span class="comment">// searching. It also uncovers a disk-full</span></div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>&#160; <span class="comment">// situation earlier and hopefully without</span></div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>&#160; <span class="comment">// actually filling disk to 100%:</span></div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>&#160; <span class="keywordtype">long</span> finalLength = totalSize + os.FilePointer;</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>&#160; os.SetLength(finalLength);</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>&#160;</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>&#160; <span class="comment">// Open the files and copy their data into the stream.</span></div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>&#160; <span class="comment">// Remember the locations of each file&#39;s data section.</span></div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>&#160; var buffer = <span class="keyword">new</span> byte[16384];</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>&#160; <span class="keywordflow">foreach</span> (FileEntry fe <span class="keywordflow">in</span> entries)</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>&#160; {</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>&#160; fe.dataOffset = os.FilePointer;</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>&#160; CopyFile(fe, os, buffer);</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>&#160; }</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>&#160;</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>&#160; <span class="comment">// Write the data offsets into the directory of the compound stream</span></div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>&#160; <span class="keywordflow">foreach</span> (FileEntry fe <span class="keywordflow">in</span> entries)</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>&#160; {</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>&#160; os.Seek(fe.directoryOffset);</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>&#160; os.WriteLong(fe.dataOffset);</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>&#160; }</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>&#160;</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>&#160; System.Diagnostics.Debug.Assert(finalLength == os.Length);</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>&#160;</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>&#160; <span class="comment">// Close the output stream. Set the os to null before trying to</span></div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>&#160; <span class="comment">// close so that if an exception occurs during the close, the</span></div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>&#160; <span class="comment">// finally clause below will not attempt to close the stream</span></div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>&#160; <span class="comment">// the second time.</span></div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>&#160; <a class="code" href="_byte_slice_reader_8cs.html#ade6c9dd9318ff9ca227f26d89b0ad2e5">IndexOutput</a> tmp = os;</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>&#160; os = null;</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>&#160; tmp.Close();</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>&#160; }</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>&#160; <span class="keywordflow">finally</span></div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>&#160; {</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>&#160; <span class="keywordflow">if</span> (os != null)</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>&#160; <span class="keywordflow">try</span></div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>&#160; {</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>&#160; os.Close();</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>&#160; }</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>&#160; <span class="keywordflow">catch</span> (System.IO.IOException)</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>&#160; {</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>&#160; }</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>&#160; }</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>&#160; }</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>&#160;</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>&#160; </div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>&#160; <span class="keyword">private</span> <span class="keywordtype">void</span> CopyFile(FileEntry source, <a class="code" href="_byte_slice_reader_8cs.html#ade6c9dd9318ff9ca227f26d89b0ad2e5">IndexOutput</a> os, byte[] buffer)</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>&#160; {</div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>&#160; <a class="code" href="_byte_slice_reader_8cs.html#a12195e9150e4d7af469b90ac95cc47ee">IndexInput</a> isRenamed = null;</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>&#160; <span class="keywordflow">try</span></div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>&#160; {</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>&#160; <span class="keywordtype">long</span> startPtr = os.FilePointer;</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>&#160; </div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>&#160; isRenamed = directory.OpenInput(source.file);</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>&#160; <span class="keywordtype">long</span> length = isRenamed.Length();</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>&#160; <span class="keywordtype">long</span> remainder = length;</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>&#160; <span class="keywordtype">int</span> chunk = buffer.Length;</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>&#160; </div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>&#160; <span class="keywordflow">while</span> (remainder &gt; 0)</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>&#160; {</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>&#160; var len = (int) Math.Min(chunk, remainder);</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>&#160; isRenamed.ReadBytes(buffer, 0, len, <span class="keyword">false</span>);</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>&#160; os.WriteBytes(buffer, len);</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>&#160; remainder -= len;</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>&#160; <span class="keywordflow">if</span> (checkAbort != null)</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>&#160; <span class="comment">// Roughly every 2 MB we will check if</span></div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>&#160; <span class="comment">// it&#39;s time to abort</span></div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>&#160; checkAbort.Work(80);</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>&#160; }</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>&#160; </div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>&#160; <span class="comment">// Verify that remainder is 0</span></div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>&#160; <span class="keywordflow">if</span> (remainder != 0)</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> System.IO.IOException(<span class="stringliteral">&quot;Non-zero remainder length after copying: &quot;</span> + remainder + <span class="stringliteral">&quot; (id: &quot;</span> + source.file + <span class="stringliteral">&quot;, length: &quot;</span> + length + <span class="stringliteral">&quot;, buffer size: &quot;</span> + chunk + <span class="stringliteral">&quot;)&quot;</span>);</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>&#160; </div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>&#160; <span class="comment">// Verify that the output length diff is equal to original file</span></div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>&#160; <span class="keywordtype">long</span> endPtr = os.FilePointer;</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>&#160; <span class="keywordtype">long</span> diff = endPtr - startPtr;</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>&#160; <span class="keywordflow">if</span> (diff != length)</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>&#160; <span class="keywordflow">throw</span> <span class="keyword">new</span> System.IO.IOException(<span class="stringliteral">&quot;Difference in the output file offsets &quot;</span> + diff + <span class="stringliteral">&quot; does not match the original file length &quot;</span> + length);</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>&#160; }</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>&#160; <span class="keywordflow">finally</span></div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>&#160; {</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>&#160; <span class="keywordflow">if</span> (isRenamed != null)</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>&#160; isRenamed.Close();</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>&#160; }</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>&#160; }</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>&#160; }</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>&#160;}</div>
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