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From w...@apache.org
Subject [45/51] [partial] arrow-site git commit: Update C++ API docs to 0.5.0
Date Mon, 31 Jul 2017 19:30:03 GMT
http://git-wip-us.apache.org/repos/asf/arrow-site/blob/b286da84/docs/cpp/bit-stream-utils_8h_source.html
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+<a href="bit-stream-utils_8h.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">// Licensed to the Apache Software Foundation (ASF) under one</span></div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment">// or more contributor license agreements.  See the NOTICE file</span></div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">// distributed with this work for additional information</span></div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">// regarding copyright ownership.  The ASF licenses this file</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment">// to you under the Apache License, Version 2.0 (the</span></div><div class="line"><a name="l00006"></a><s
 pan class="lineno">    6</span>&#160;<span class="comment">// &quot;License&quot;); you may not use this file except in compliance</span></div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment">// with 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,</span></div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment">// software dist
 ributed under the License is distributed on an</span></div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment">// &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span></div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment">// KIND, either express or implied.  See the License for the</span></div><div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment">// specific language governing permissions and limitations</span></div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment">// under the License.</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="comment">// From Apache Impala (incubating) as of 2016-01-29</span></div><div class="line"><a name="l0001
 9"></a><span class="lineno">   19</span>&#160;</div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="preprocessor">#ifndef ARROW_UTIL_BIT_STREAM_UTILS_H</span></div><div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="preprocessor">#define ARROW_UTIL_BIT_STREAM_UTILS_H</span></div><div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;</div><div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="preprocessor">#include &lt;algorithm&gt;</span></div><div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="preprocessor">#include &lt;cstdint&gt;</span></div><div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="preprocessor">#include &lt;<a class="code" href="string_8h.html">string.h</a>&gt;</span></div><div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;</
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 55</span>&#160;  }</div><div class="line"><a name="l00056"></a><span class="lineno"><a class="line" href="classarrow_1_1_bit_writer.html#a9d33b2acbd9fca179863fcde288a079d">   56</a></span>&#160;  uint8_t* <a class="code" href="classarrow_1_1_bit_writer.html#a9d33b2acbd9fca179863fcde288a079d">buffer</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> buffer_; }</div><div class="line"><a name="l00057"></a><span class="lineno"><a class="line" href="classarrow_1_1_bit_writer.html#a5592cdd1db11520ea5ae0be95fb4732a">   57</a></span>&#160;  <span class="keywordtype">int</span> <a class="code" href="classarrow_1_1_bit_writer.html#a5592cdd1db11520ea5ae0be95fb4732a">buffer_len</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> max_bytes_; }</div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;</div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;  <span class="keywordtype
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 52f53d">PutVlqInt</a>(uint32_t v);</div><div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;</div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;  <span class="comment">// Writes an int zigzag encoded.</span></div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;  <span class="keywordtype">bool</span> <a class="code" href="classarrow_1_1_bit_writer.html#a2e764de1162c33a6aa41caad00322156">PutZigZagVlqInt</a>(int32_t v);</div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;</div><div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;  uint8_t* <a class="code" href="classarrow_1_1_bit_writer.html#a2d5943b81c4340b54bfd019955a7d959">GetNextBytePtr</a>(<span class="keywordtype">int</span> num_bytes = 1);</div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;</div><div class="line"><a name="l00086"></a><span class="lineno"> 
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 96"></a><span class="lineno">   96</span>&#160;  <span class="keywordtype">int</span> byte_offset_;  <span class="comment">// Offset in buffer_</span></div><div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;  <span class="keywordtype">int</span> bit_offset_;   <span class="comment">// Offset in buffered_values_</span></div><div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;};</div><div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;</div><div class="line"><a name="l00103"></a><span class="lineno"><a class="line" href="classarrow_1_1_bit_reader.html">  103</a></span>&#160;<span class="keyword">class </span><a class="code" href="classarrow_1_1_bit_reader.html">BitReader</a> {</div><div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160; <span class="keyword">public</span>:</div><div class="line"><a name="l00106"></a><span class="lineno"><a class="line" href="classarrow_1_1_bit_reader.
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 lass="lineno">  110</span>&#160;  }</div><div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;</div><div class="line"><a name="l00112"></a><span class="lineno"><a class="line" href="classarrow_1_1_bit_reader.html#a59f592e16907128787dfaa8c7cfa839e">  112</a></span>&#160;  <a class="code" href="classarrow_1_1_bit_reader.html#a59f592e16907128787dfaa8c7cfa839e">BitReader</a>() : buffer_(NULL), max_bytes_(0) {}</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"><a class="line" href="classarrow_1_1_bit_reader.html#aaaefbf3fa141ce764cda52c0e1e55103">  114</a></span>&#160;  <span class="keywordtype">void</span> <a class="code" href="classarrow_1_1_bit_reader.html#aaaefbf3fa141ce764cda52c0e1e55103">Reset</a>(<span class="keyword">const</span> uint8_t* <a class="code" href="classarrow_1_1_bit_writer.html#a9d33b2acbd9fca179863fcde288a079d">buffer</a>, <span class="keywordt
 ype">int</span> <a class="code" href="classarrow_1_1_bit_writer.html#a5592cdd1db11520ea5ae0be95fb4732a">buffer_len</a>) {</div><div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;    buffer_ = <a class="code" href="classarrow_1_1_bit_writer.html#a9d33b2acbd9fca179863fcde288a079d">buffer</a>;</div><div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;    max_bytes_ = <a class="code" href="classarrow_1_1_bit_writer.html#a5592cdd1db11520ea5ae0be95fb4732a">buffer_len</a>;</div><div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;    byte_offset_ = 0;</div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    bit_offset_ = 0;</div><div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;    <span class="keywordtype">int</span> num_bytes = std::min(8, max_bytes_ - byte_offset_);</div><div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;    me
 mcpy(&amp;buffered_values_, buffer_ + byte_offset_, num_bytes);</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;</div><div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;  <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div><div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;  <span class="keywordtype">bool</span> GetValue(<span class="keywordtype">int</span> num_bits, T* v);</div><div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;</div><div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;  <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div><div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;  <span class="keywordtype">int</span> GetBatch(<span class="keywor
 dtype">int</span> num_bits, T* v, <span class="keywordtype">int</span> batch_size);</div><div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;</div><div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;  <span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div><div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;  <span class="keywordtype">bool</span> GetAligned(<span class="keywordtype">int</span> num_bytes, T* v);</div><div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;</div><div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;  <span class="keywordtype">bool</span> GetVlqInt(int32_t* v);</div><div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;</div><div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;  <span class="comment">// Reads a zigzag encoded int `into` v.</span></
 div><div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;  <span class="keywordtype">bool</span> GetZigZagVlqInt(int32_t* v);</div><div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;</div><div class="line"><a name="l00150"></a><span class="lineno"><a class="line" href="classarrow_1_1_bit_reader.html#a943f521c4855e418bc106e55fd2de8d3">  150</a></span>&#160;  <span class="keywordtype">int</span> <a class="code" href="classarrow_1_1_bit_reader.html#a943f521c4855e418bc106e55fd2de8d3">bytes_left</a>() {</div><div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;    <span class="keywordflow">return</span> max_bytes_ - (byte_offset_ + <span class="keyword">static_cast&lt;</span><span class="keywordtype">int</span><span class="keyword">&gt;</span>(BitUtil::Ceil(bit_offset_, 8)));</div><div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;  }</div><div class="line"><a name="l00153"></a><span c
 lass="lineno">  153</span>&#160;</div><div class="line"><a name="l00155"></a><span class="lineno"><a class="line" href="classarrow_1_1_bit_reader.html#aa5953074578c6d5e068574ab4ccb3e35">  155</a></span>&#160;  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">int</span> MAX_VLQ_BYTE_LEN = 5;</div><div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;</div><div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160; <span class="keyword">private</span>:</div><div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;  <span class="keyword">const</span> uint8_t* buffer_;</div><div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;  <span class="keywordtype">int</span> max_bytes_;</div><div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;</div><div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;  uint64_t b
 uffered_values_;</div><div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;</div><div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;  <span class="keywordtype">int</span> byte_offset_;  <span class="comment">// Offset in buffer_</span></div><div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;  <span class="keywordtype">int</span> bit_offset_;   <span class="comment">// Offset in buffered_values_</span></div><div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;};</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"><a class="line" href="classarrow_1_1_bit_writer.html#a407df208444d95e50d5ec6c608104cda">  169</a></span>&#160;<span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="classarrow_1_1_bit_writer.html#a407df208444d95e50d5ec6c608104cda">BitWri
 ter::PutValue</a>(uint64_t v, <span class="keywordtype">int</span> num_bits) {</div><div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;  <span class="comment">// TODO: revisit this limit if necessary (can be raised to 64 by fixing some edge cases)</span></div><div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;  <a class="code" href="logging_8h.html#a4395e95bab44e222cb2e77251017a0e2">DCHECK_LE</a>(num_bits, 32);</div><div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;  <a class="code" href="logging_8h.html#ae89df3243bbb8341130c7b3f44145ea0">DCHECK_EQ</a>(v &gt;&gt; num_bits, 0) &lt;&lt; <span class="stringliteral">&quot;v = &quot;</span> &lt;&lt; v &lt;&lt; <span class="stringliteral">&quot;, num_bits = &quot;</span> &lt;&lt; num_bits;</div><div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;</div><div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;  <s
 pan class="keywordflow">if</span> (<a class="code" href="compiler-util_8h.html#a9acc330d508b9a3b775cfdf7ce405e7d">UNLIKELY</a>(byte_offset_ * 8 + bit_offset_ + num_bits &gt; max_bytes_ * 8)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;</div><div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;  buffered_values_ |= v &lt;&lt; bit_offset_;</div><div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;  bit_offset_ += num_bits;</div><div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;</div><div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;  <span class="keywordflow">if</span> (<a class="code" href="compiler-util_8h.html#a9acc330d508b9a3b775cfdf7ce405e7d">UNLIKELY</a>(bit_offset_ &gt;= 64)) {</div><div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160; 
    <span class="comment">// Flush buffered_values_ and write out bits of v that did not fit</span></div><div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;    memcpy(buffer_ + byte_offset_, &amp;buffered_values_, 8);</div><div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160;    buffered_values_ = 0;</div><div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160;    byte_offset_ += 8;</div><div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;    bit_offset_ -= 64;</div><div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160;    buffered_values_ = v &gt;&gt; (num_bits - bit_offset_);</div><div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;  }</div><div class="line"><a name="l00187"></a><span class="lineno">  187</span>&#160;  <a class="code" href="logging_8h.html#ab62f5ed8f2d48e29802be0cbbcd1359a">DCHECK_LT</a>(bit_offset_, 64);</div><div cl
 ass="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;  <span class="keywordflow">return</span> <span class="keyword">true</span>;</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;</div><div class="line"><a name="l00191"></a><span class="lineno"><a class="line" href="classarrow_1_1_bit_writer.html#a869a43c7c8006e1658fd4ae44a92e347">  191</a></span>&#160;<span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="classarrow_1_1_bit_writer.html#a869a43c7c8006e1658fd4ae44a92e347">BitWriter::Flush</a>(<span class="keywordtype">bool</span> align) {</div><div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;  <span class="keywordtype">int</span> num_bytes = <span class="keyword">static_cast&lt;</span><span class="keywordtype">int</span><span class="keyword">&gt;</span>(BitUtil::Ceil(bit_offset_, 
 8));</div><div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160;  <a class="code" href="logging_8h.html#a4395e95bab44e222cb2e77251017a0e2">DCHECK_LE</a>(byte_offset_ + num_bytes, max_bytes_);</div><div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;  memcpy(buffer_ + byte_offset_, &amp;buffered_values_, num_bytes);</div><div class="line"><a name="l00195"></a><span class="lineno">  195</span>&#160;</div><div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;  <span class="keywordflow">if</span> (align) {</div><div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;    buffered_values_ = 0;</div><div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;    byte_offset_ += num_bytes;</div><div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;    bit_offset_ = 0;</div><div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160;  }</
 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;</div><div class="line"><a name="l00203"></a><span class="lineno"><a class="line" href="classarrow_1_1_bit_writer.html#a2d5943b81c4340b54bfd019955a7d959">  203</a></span>&#160;<span class="keyword">inline</span> uint8_t* <a class="code" href="classarrow_1_1_bit_writer.html#a2d5943b81c4340b54bfd019955a7d959">BitWriter::GetNextBytePtr</a>(<span class="keywordtype">int</span> num_bytes) {</div><div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160;  <a class="code" href="classarrow_1_1_bit_writer.html#a869a43c7c8006e1658fd4ae44a92e347">Flush</a>(<span class="comment">/* align */</span> <span class="keyword">true</span>);</div><div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;  <a class="code" href="logging_8h.html#a4395e95bab44e222cb2e77251017a0e2">DCHECK_LE</a>(byte_offs
 et_, max_bytes_);</div><div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160;  <span class="keywordflow">if</span> (byte_offset_ + num_bytes &gt; max_bytes_) <span class="keywordflow">return</span> NULL;</div><div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;  uint8_t* ptr = buffer_ + byte_offset_;</div><div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;  byte_offset_ += num_bytes;</div><div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;  <span class="keywordflow">return</span> ptr;</div><div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;}</div><div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;</div><div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div><div class="line"><a name="l00213"></a><span class="lineno">
 <a class="line" href="classarrow_1_1_bit_writer.html#aa76314faef71d7ad351dbd3f16c84fc0">  213</a></span>&#160;<span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="classarrow_1_1_bit_writer.html#aa76314faef71d7ad351dbd3f16c84fc0">BitWriter::PutAligned</a>(T val, <span class="keywordtype">int</span> num_bytes) {</div><div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;  uint8_t* ptr = <a class="code" href="classarrow_1_1_bit_writer.html#a2d5943b81c4340b54bfd019955a7d959">GetNextBytePtr</a>(num_bytes);</div><div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160;  <span class="keywordflow">if</span> (ptr == NULL) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;  memcpy(ptr, &amp;val, num_bytes);</div><div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;  <span cl
 ass="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;}</div><div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;</div><div class="line"><a name="l00220"></a><span class="lineno"><a class="line" href="classarrow_1_1_bit_writer.html#a028f9d7d77697df651ef82d2df52f53d">  220</a></span>&#160;<span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="classarrow_1_1_bit_writer.html#a028f9d7d77697df651ef82d2df52f53d">BitWriter::PutVlqInt</a>(uint32_t v) {</div><div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;  <span class="keywordtype">bool</span> result = <span class="keyword">true</span>;</div><div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;  <span class="keywordflow">while</span> ((v &amp; 0xFFFFFF80) != 0L) {</div><div class="line"><a name="l00223"></a><span class="lineno
 ">  223</span>&#160;    result &amp;= PutAligned&lt;uint8_t&gt;(<span class="keyword">static_cast&lt;</span>uint8_t<span class="keyword">&gt;</span>((v &amp; 0x7F) | 0x80), 1);</div><div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;    v &gt;&gt;= 7;</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;  result &amp;= PutAligned&lt;uint8_t&gt;(<span class="keyword">static_cast&lt;</span>uint8_t<span class="keyword">&gt;</span>(v &amp; 0x7F), 1);</div><div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;  <span class="keywordflow">return</span> result;</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="l00230"></a><span class="lineno">  230</span>&#160;<span class="keyw
 ord">template</span> &lt;<span class="keyword">typename</span> T&gt;</div><div class="line"><a name="l00231"></a><span class="lineno"><a class="line" href="namespacearrow.html#a6bbaeb6cc0014ad51028afe84894c5e9">  231</a></span>&#160;<span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="namespacearrow.html#a6bbaeb6cc0014ad51028afe84894c5e9">GetValue_</a>(<span class="keywordtype">int</span> num_bits, T* v, <span class="keywordtype">int</span> max_bytes, <span class="keyword">const</span> uint8_t* <a class="code" href="classarrow_1_1_bit_writer.html#a9d33b2acbd9fca179863fcde288a079d">buffer</a>,</div><div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;    <span class="keywordtype">int</span>* bit_offset, <span class="keywordtype">int</span>* byte_offset, uint64_t* buffered_values) {</div><div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;<span class="preprocessor">#ifdef _MSC_VER</span></div
 ><div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;<span class="preprocessor">#pragma warning(push)</span></div><div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;<span class="preprocessor">#pragma warning(disable : 4800)</span></div><div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;  *v = <span class="keyword">static_cast&lt;</span>T<span class="keyword">&gt;</span>(</div><div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;      BitUtil::TrailingBits(*buffered_values, *bit_offset + num_bits) &gt;&gt; *bit_offset);</div><div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;<span class="preprocessor">#ifdef _MSC_VER</span></div><div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;<span class="preprocessor">
 #pragma warning(pop)</span></div><div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;  *bit_offset += num_bits;</div><div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;  <span class="keywordflow">if</span> (*bit_offset &gt;= 64) {</div><div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;    *byte_offset += 8;</div><div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;    *bit_offset -= 64;</div><div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160;</div><div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;    <span class="keywordtype">int</span> bytes_remaining = max_bytes - *byte_offset;</div><div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;    <span class="keywordflow">if</span> (<
 a class="code" href="compiler-util_8h.html#a262afcfe437f4addb13fb1b47a6a7086">LIKELY</a>(bytes_remaining &gt;= 8)) {</div><div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;      memcpy(buffered_values, buffer + *byte_offset, 8);</div><div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;    } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160;      memcpy(buffered_values, buffer + *byte_offset, bytes_remaining);</div><div class="line"><a name="l00252"></a><span class="lineno">  252</span>&#160;    }</div><div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;<span class="preprocessor">#ifdef _MSC_VER</span></div><div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;<span class="preprocessor">#pragma warning(push)</span></div><div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160;<span class="
 preprocessor">#pragma warning(disable : 4800 4805)</span></div><div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00257"></a><span class="lineno">  257</span>&#160;    <span class="comment">// Read bits of v that crossed into new buffered_values_</span></div><div class="line"><a name="l00258"></a><span class="lineno">  258</span>&#160;    *v = *v | <span class="keyword">static_cast&lt;</span>T<span class="keyword">&gt;</span>(BitUtil::TrailingBits(*buffered_values, *bit_offset)</div><div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160;                             &lt;&lt; (num_bits - *bit_offset));</div><div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;<span class="preprocessor">#ifdef _MSC_VER</span></div><div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;<span class="preprocessor">#pragma warning(pop)</
 span></div><div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;    <a class="code" href="logging_8h.html#a4395e95bab44e222cb2e77251017a0e2">DCHECK_LE</a>(*bit_offset, 64);</div><div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160;  }</div><div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;}</div><div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;</div><div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div><div class="line"><a name="l00268"></a><span class="lineno"><a class="line" href="classarrow_1_1_bit_reader.html#a20420d2374d3eb9177c5c3a0f5493cd1">  268</a></span>&#160;<span class="keyword">inline</span> <span class="keywordtype">bool</span> <
 a class="code" href="classarrow_1_1_bit_reader.html#a20420d2374d3eb9177c5c3a0f5493cd1">BitReader::GetValue</a>(<span class="keywordtype">int</span> num_bits, T* v) {</div><div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;  <span class="keywordflow">return</span> GetBatch(num_bits, v, 1) == 1;</div><div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;}</div><div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;</div><div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div><div class="line"><a name="l00273"></a><span class="lineno"><a class="line" href="classarrow_1_1_bit_reader.html#a6f023d4ce78bd6a9cbc2f372f441d964">  273</a></span>&#160;<span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="classarrow_1_1_bit_reader.html#a6f023d4ce78bd6a9cbc2f372f441d964">B
 itReader::GetBatch</a>(<span class="keywordtype">int</span> num_bits, T* v, <span class="keywordtype">int</span> batch_size) {</div><div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;  <a class="code" href="logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(buffer_ != NULL);</div><div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;  <span class="comment">// TODO: revisit this limit if necessary</span></div><div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;  <a class="code" href="logging_8h.html#a4395e95bab44e222cb2e77251017a0e2">DCHECK_LE</a>(num_bits, 32);</div><div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;  <a class="code" href="logging_8h.html#a4395e95bab44e222cb2e77251017a0e2">DCHECK_LE</a>(num_bits, static_cast&lt;int&gt;(<span class="keyword">sizeof</span>(T) * 8));</div><div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;</div><
 div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;  <span class="keywordtype">int</span> bit_offset = bit_offset_;</div><div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;  <span class="keywordtype">int</span> byte_offset = byte_offset_;</div><div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;  uint64_t buffered_values = buffered_values_;</div><div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;  <span class="keywordtype">int</span> max_bytes = max_bytes_;</div><div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;  <span class="keyword">const</span> uint8_t* <a class="code" href="classarrow_1_1_bit_writer.html#a9d33b2acbd9fca179863fcde288a079d">buffer</a> = buffer_;</div><div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;</div><div class="line"><a name="l00285"></a><span class="lineno">  285</span>&#160;  uint64_t needed_bits 
 = num_bits * batch_size;</div><div class="line"><a name="l00286"></a><span class="lineno">  286</span>&#160;  uint64_t remaining_bits = (max_bytes - byte_offset) * 8 - bit_offset;</div><div class="line"><a name="l00287"></a><span class="lineno">  287</span>&#160;  <span class="keywordflow">if</span> (remaining_bits &lt; needed_bits) {</div><div class="line"><a name="l00288"></a><span class="lineno">  288</span>&#160;    batch_size = <span class="keyword">static_cast&lt;</span><span class="keywordtype">int</span><span class="keyword">&gt;</span>(remaining_bits) / num_bits;</div><div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160;  }</div><div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;</div><div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;  <span class="keywordtype">int</span> i = 0;</div><div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;  <span class="keywordflow">if</spa
 n> (<a class="code" href="compiler-util_8h.html#a9acc330d508b9a3b775cfdf7ce405e7d">UNLIKELY</a>(bit_offset != 0)) {</div><div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160;    <span class="keywordflow">for</span> (; i &lt; batch_size &amp;&amp; bit_offset != 0; ++i) {</div><div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160;      <a class="code" href="namespacearrow.html#a6bbaeb6cc0014ad51028afe84894c5e9">GetValue_</a>(num_bits, &amp;v[i], max_bytes, buffer, &amp;bit_offset, &amp;byte_offset,</div><div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;          &amp;buffered_values);</div><div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;    }</div><div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;  }</div><div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;</div><div class="line"><a name="l00299"></a><span class="lineno">  299
 </span>&#160;  <span class="keywordflow">if</span> (<span class="keyword">sizeof</span>(T) == 4) {</div><div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;    <span class="keywordtype">int</span> num_unpacked = <a class="code" href="namespacearrow.html#aeb0cec20eaabc5cc37e1144ab9348756">unpack32</a>(reinterpret_cast&lt;const uint32_t*&gt;(buffer + byte_offset),</div><div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;        reinterpret_cast&lt;uint32_t*&gt;(v + i), batch_size - i, num_bits);</div><div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;    i += num_unpacked;</div><div class="line"><a name="l00303"></a><span class="lineno">  303</span>&#160;    byte_offset += num_unpacked * num_bits / 8;</div><div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00305"></a><span class="lineno">  305</span>&#160
 ;    <span class="keyword">const</span> <span class="keywordtype">int</span> buffer_size = 1024;</div><div class="line"><a name="l00306"></a><span class="lineno">  306</span>&#160;    uint32_t unpack_buffer[buffer_size];</div><div class="line"><a name="l00307"></a><span class="lineno">  307</span>&#160;    <span class="keywordflow">while</span> (i &lt; batch_size) {</div><div class="line"><a name="l00308"></a><span class="lineno">  308</span>&#160;      <span class="keywordtype">int</span> unpack_size = std::min(buffer_size, batch_size - i);</div><div class="line"><a name="l00309"></a><span class="lineno">  309</span>&#160;      <span class="keywordtype">int</span> num_unpacked = <a class="code" href="namespacearrow.html#aeb0cec20eaabc5cc37e1144ab9348756">unpack32</a>(reinterpret_cast&lt;const uint32_t*&gt;(buffer + byte_offset),</div><div class="line"><a name="l00310"></a><span class="lineno">  310</span>&#160;          unpack_buffer, unpack_size, num_bits);</div><div class="line">
 <a name="l00311"></a><span class="lineno">  311</span>&#160;      <span class="keywordflow">if</span> (num_unpacked == 0) { <span class="keywordflow">break</span>; }</div><div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;      <span class="keywordflow">for</span> (<span class="keywordtype">int</span> k = 0; k &lt; num_unpacked; ++k) {</div><div class="line"><a name="l00313"></a><span class="lineno">  313</span>&#160;<span class="preprocessor">#ifdef _MSC_VER</span></div><div class="line"><a name="l00314"></a><span class="lineno">  314</span>&#160;<span class="preprocessor">#pragma warning(push)</span></div><div class="line"><a name="l00315"></a><span class="lineno">  315</span>&#160;<span class="preprocessor">#pragma warning(disable : 4800)</span></div><div class="line"><a name="l00316"></a><span class="lineno">  316</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00317"></a><span class="lineno">  317</span>&#160;    
     v[i + k] = <span class="keyword">static_cast&lt;</span>T<span class="keyword">&gt;</span>(unpack_buffer[k]);</div><div class="line"><a name="l00318"></a><span class="lineno">  318</span>&#160;<span class="preprocessor">#ifdef _MSC_VER</span></div><div class="line"><a name="l00319"></a><span class="lineno">  319</span>&#160;<span class="preprocessor">#pragma warning(pop)</span></div><div class="line"><a name="l00320"></a><span class="lineno">  320</span>&#160;<span class="preprocessor">#endif</span></div><div class="line"><a name="l00321"></a><span class="lineno">  321</span>&#160;      }</div><div class="line"><a name="l00322"></a><span class="lineno">  322</span>&#160;      i += num_unpacked;</div><div class="line"><a name="l00323"></a><span class="lineno">  323</span>&#160;      byte_offset += num_unpacked * num_bits / 8;</div><div class="line"><a name="l00324"></a><span class="lineno">  324</span>&#160;    }</div><div class="line"><a name="l00325"></a><span class="lineno">  3
 25</span>&#160;  }</div><div class="line"><a name="l00326"></a><span class="lineno">  326</span>&#160;</div><div class="line"><a name="l00327"></a><span class="lineno">  327</span>&#160;  <span class="keywordtype">int</span> bytes_remaining = max_bytes - byte_offset;</div><div class="line"><a name="l00328"></a><span class="lineno">  328</span>&#160;  <span class="keywordflow">if</span> (bytes_remaining &gt;= 8) {</div><div class="line"><a name="l00329"></a><span class="lineno">  329</span>&#160;    memcpy(&amp;buffered_values, buffer + byte_offset, 8);</div><div class="line"><a name="l00330"></a><span class="lineno">  330</span>&#160;  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00331"></a><span class="lineno">  331</span>&#160;    memcpy(&amp;buffered_values, buffer + byte_offset, bytes_remaining);</div><div class="line"><a name="l00332"></a><span class="lineno">  332</span>&#160;  }</div><div class="line"><a name="l00333"></a><span class="lineno">  3
 33</span>&#160;</div><div class="line"><a name="l00334"></a><span class="lineno">  334</span>&#160;  <span class="keywordflow">for</span> (; i &lt; batch_size; ++i) {</div><div class="line"><a name="l00335"></a><span class="lineno">  335</span>&#160;    <a class="code" href="namespacearrow.html#a6bbaeb6cc0014ad51028afe84894c5e9">GetValue_</a>(</div><div class="line"><a name="l00336"></a><span class="lineno">  336</span>&#160;        num_bits, &amp;v[i], max_bytes, buffer, &amp;bit_offset, &amp;byte_offset, &amp;buffered_values);</div><div class="line"><a name="l00337"></a><span class="lineno">  337</span>&#160;  }</div><div class="line"><a name="l00338"></a><span class="lineno">  338</span>&#160;</div><div class="line"><a name="l00339"></a><span class="lineno">  339</span>&#160;  bit_offset_ = bit_offset;</div><div class="line"><a name="l00340"></a><span class="lineno">  340</span>&#160;  byte_offset_ = byte_offset;</div><div class="line"><a name="l00341"></a><span class="lineno">  
 341</span>&#160;  buffered_values_ = buffered_values;</div><div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160;</div><div class="line"><a name="l00343"></a><span class="lineno">  343</span>&#160;  <span class="keywordflow">return</span> batch_size;</div><div class="line"><a name="l00344"></a><span class="lineno">  344</span>&#160;}</div><div class="line"><a name="l00345"></a><span class="lineno">  345</span>&#160;</div><div class="line"><a name="l00346"></a><span class="lineno">  346</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div><div class="line"><a name="l00347"></a><span class="lineno"><a class="line" href="classarrow_1_1_bit_reader.html#ae209b69dc854275c1425d4d11abf36bd">  347</a></span>&#160;<span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="classarrow_1_1_bit_reader.html#ae209b69dc854275c1425d4d11abf36bd">BitReader::GetAligned</a>(<span class="keywordt
 ype">int</span> num_bytes, T* v) {</div><div class="line"><a name="l00348"></a><span class="lineno">  348</span>&#160;  <a class="code" href="logging_8h.html#a4395e95bab44e222cb2e77251017a0e2">DCHECK_LE</a>(num_bytes, static_cast&lt;int&gt;(<span class="keyword">sizeof</span>(T)));</div><div class="line"><a name="l00349"></a><span class="lineno">  349</span>&#160;  <span class="keywordtype">int</span> bytes_read = <span class="keyword">static_cast&lt;</span><span class="keywordtype">int</span><span class="keyword">&gt;</span>(BitUtil::Ceil(bit_offset_, 8));</div><div class="line"><a name="l00350"></a><span class="lineno">  350</span>&#160;  <span class="keywordflow">if</span> (<a class="code" href="compiler-util_8h.html#a9acc330d508b9a3b775cfdf7ce405e7d">UNLIKELY</a>(byte_offset_ + bytes_read + num_bytes &gt; max_bytes_)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00351"></a><span class="lineno">  351</span>&#160;</di
 v><div class="line"><a name="l00352"></a><span class="lineno">  352</span>&#160;  <span class="comment">// Advance byte_offset to next unread byte and read num_bytes</span></div><div class="line"><a name="l00353"></a><span class="lineno">  353</span>&#160;  byte_offset_ += bytes_read;</div><div class="line"><a name="l00354"></a><span class="lineno">  354</span>&#160;  memcpy(v, buffer_ + byte_offset_, num_bytes);</div><div class="line"><a name="l00355"></a><span class="lineno">  355</span>&#160;  byte_offset_ += num_bytes;</div><div class="line"><a name="l00356"></a><span class="lineno">  356</span>&#160;</div><div class="line"><a name="l00357"></a><span class="lineno">  357</span>&#160;  <span class="comment">// Reset buffered_values_</span></div><div class="line"><a name="l00358"></a><span class="lineno">  358</span>&#160;  bit_offset_ = 0;</div><div class="line"><a name="l00359"></a><span class="lineno">  359</span>&#160;  <span class="keywordtype">int</span> bytes_remaining = ma
 x_bytes_ - byte_offset_;</div><div class="line"><a name="l00360"></a><span class="lineno">  360</span>&#160;  <span class="keywordflow">if</span> (<a class="code" href="compiler-util_8h.html#a262afcfe437f4addb13fb1b47a6a7086">LIKELY</a>(bytes_remaining &gt;= 8)) {</div><div class="line"><a name="l00361"></a><span class="lineno">  361</span>&#160;    memcpy(&amp;buffered_values_, buffer_ + byte_offset_, 8);</div><div class="line"><a name="l00362"></a><span class="lineno">  362</span>&#160;  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00363"></a><span class="lineno">  363</span>&#160;    memcpy(&amp;buffered_values_, buffer_ + byte_offset_, bytes_remaining);</div><div class="line"><a name="l00364"></a><span class="lineno">  364</span>&#160;  }</div><div class="line"><a name="l00365"></a><span class="lineno">  365</span>&#160;  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00366"></a><span clas
 s="lineno">  366</span>&#160;}</div><div class="line"><a name="l00367"></a><span class="lineno">  367</span>&#160;</div><div class="line"><a name="l00368"></a><span class="lineno"><a class="line" href="classarrow_1_1_bit_reader.html#a93bcd15198d511bf77a3980e4a9d343d">  368</a></span>&#160;<span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="classarrow_1_1_bit_reader.html#a93bcd15198d511bf77a3980e4a9d343d">BitReader::GetVlqInt</a>(int32_t* v) {</div><div class="line"><a name="l00369"></a><span class="lineno">  369</span>&#160;  *v = 0;</div><div class="line"><a name="l00370"></a><span class="lineno">  370</span>&#160;  <span class="keywordtype">int</span> shift = 0;</div><div class="line"><a name="l00371"></a><span class="lineno">  371</span>&#160;  <span class="keywordtype">int</span> num_bytes = 0;</div><div class="line"><a name="l00372"></a><span class="lineno">  372</span>&#160;  uint8_t byte = 0;</div><div class="line"><a name="l00373">
 </a><span class="lineno">  373</span>&#160;  <span class="keywordflow">do</span> {</div><div class="line"><a name="l00374"></a><span class="lineno">  374</span>&#160;    <span class="keywordflow">if</span> (!GetAligned&lt;uint8_t&gt;(1, &amp;byte)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00375"></a><span class="lineno">  375</span>&#160;    *v |= (byte &amp; 0x7F) &lt;&lt; shift;</div><div class="line"><a name="l00376"></a><span class="lineno">  376</span>&#160;    shift += 7;</div><div class="line"><a name="l00377"></a><span class="lineno">  377</span>&#160;    <a class="code" href="logging_8h.html#a4395e95bab44e222cb2e77251017a0e2">DCHECK_LE</a>(++num_bytes, MAX_VLQ_BYTE_LEN);</div><div class="line"><a name="l00378"></a><span class="lineno">  378</span>&#160;  } <span class="keywordflow">while</span> ((byte &amp; 0x80) != 0);</div><div class="line"><a name="l00379"></a><span class="lineno">  379</span>&#160;  <sp
 an class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00380"></a><span class="lineno">  380</span>&#160;}</div><div class="line"><a name="l00381"></a><span class="lineno">  381</span>&#160;</div><div class="line"><a name="l00382"></a><span class="lineno"><a class="line" href="classarrow_1_1_bit_writer.html#a2e764de1162c33a6aa41caad00322156">  382</a></span>&#160;<span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="classarrow_1_1_bit_writer.html#a2e764de1162c33a6aa41caad00322156">BitWriter::PutZigZagVlqInt</a>(int32_t v) {</div><div class="line"><a name="l00383"></a><span class="lineno">  383</span>&#160;  uint32_t u = (v &lt;&lt; 1) ^ (v &gt;&gt; 31);</div><div class="line"><a name="l00384"></a><span class="lineno">  384</span>&#160;  <span class="keywordflow">return</span> <a class="code" href="classarrow_1_1_bit_writer.html#a028f9d7d77697df651ef82d2df52f53d">PutVlqInt</a>(u);</div><div cl
 ass="line"><a name="l00385"></a><span class="lineno">  385</span>&#160;}</div><div class="line"><a name="l00386"></a><span class="lineno">  386</span>&#160;</div><div class="line"><a name="l00387"></a><span class="lineno"><a class="line" href="classarrow_1_1_bit_reader.html#ac6f91e5030fb8cc87d27baa58dce66d3">  387</a></span>&#160;<span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="classarrow_1_1_bit_reader.html#ac6f91e5030fb8cc87d27baa58dce66d3">BitReader::GetZigZagVlqInt</a>(int32_t* v) {</div><div class="line"><a name="l00388"></a><span class="lineno">  388</span>&#160;  int32_t u_signed;</div><div class="line"><a name="l00389"></a><span class="lineno">  389</span>&#160;  <span class="keywordflow">if</span> (!GetVlqInt(&amp;u_signed)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div><div class="line"><a name="l00390"></a><span class="lineno">  390</span>&#160;  uint32_t u = <span class="keyword">static_cas
 t&lt;</span>uint32_t<span class="keyword">&gt;</span>(u_signed);</div><div class="line"><a name="l00391"></a><span class="lineno">  391</span>&#160;  *<span class="keyword">reinterpret_cast&lt;</span>uint32_t*<span class="keyword">&gt;</span>(v) = (u &gt;&gt; 1) ^ -(<span class="keyword">static_cast&lt;</span>int32_t<span class="keyword">&gt;</span>(u &amp; 1));</div><div class="line"><a name="l00392"></a><span class="lineno">  392</span>&#160;  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div><div class="line"><a name="l00393"></a><span class="lineno">  393</span>&#160;}</div><div class="line"><a name="l00394"></a><span class="lineno">  394</span>&#160;</div><div class="line"><a name="l00395"></a><span class="lineno">  395</span>&#160;}  <span class="comment">// namespace arrow</span></div><div class="line"><a name="l00396"></a><span class="lineno">  396</span>&#160;</div><div class="line"><a name="l00397"></a><span class="lineno">  397</span>&#160;<s
 pan class="preprocessor">#endif  // ARROW_UTIL_BIT_STREAM_UTILS_H</span></div><div class="ttc" id="classarrow_1_1_bit_writer_html_a407df208444d95e50d5ec6c608104cda"><div class="ttname"><a href="classarrow_1_1_bit_writer.html#a407df208444d95e50d5ec6c608104cda">arrow::BitWriter::PutValue</a></div><div class="ttdeci">bool PutValue(uint64_t v, int num_bits)</div><div class="ttdoc">Writes a value to buffered_values_, flushing to buffer_ if necessary. </div><div class="ttdef"><b>Definition:</b> bit-stream-utils.h:169</div></div>
+<div class="ttc" id="classarrow_1_1_bit_writer_html"><div class="ttname"><a href="classarrow_1_1_bit_writer.html">arrow::BitWriter</a></div><div class="ttdoc">Utility class to write bit/byte streams. </div><div class="ttdef"><b>Definition:</b> bit-stream-utils.h:37</div></div>
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+<div class="ttc" id="classarrow_1_1_bit_writer_html_a869a43c7c8006e1658fd4ae44a92e347"><div class="ttname"><a href="classarrow_1_1_bit_writer.html#a869a43c7c8006e1658fd4ae44a92e347">arrow::BitWriter::Flush</a></div><div class="ttdeci">void Flush(bool align=false)</div><div class="ttdoc">Flushes all buffered values to the buffer. </div><div class="ttdef"><b>Definition:</b> bit-stream-utils.h:191</div></div>
+<div class="ttc" id="string_8h_html"><div class="ttname"><a href="string_8h.html">string.h</a></div></div>
+<div class="ttc" id="namespacearrow_html_aeb0cec20eaabc5cc37e1144ab9348756"><div class="ttname"><a href="namespacearrow.html#aeb0cec20eaabc5cc37e1144ab9348756">arrow::unpack32</a></div><div class="ttdeci">int unpack32(const uint32_t *in, uint32_t *out, int batch_size, int num_bits)</div><div class="ttdef"><b>Definition:</b> bpacking.h:3196</div></div>
+<div class="ttc" id="classarrow_1_1_bit_reader_html_aaaefbf3fa141ce764cda52c0e1e55103"><div class="ttname"><a href="classarrow_1_1_bit_reader.html#aaaefbf3fa141ce764cda52c0e1e55103">arrow::BitReader::Reset</a></div><div class="ttdeci">void Reset(const uint8_t *buffer, int buffer_len)</div><div class="ttdef"><b>Definition:</b> bit-stream-utils.h:114</div></div>
+<div class="ttc" id="classarrow_1_1_bit_reader_html"><div class="ttname"><a href="classarrow_1_1_bit_reader.html">arrow::BitReader</a></div><div class="ttdoc">Utility class to read bit/byte stream. </div><div class="ttdef"><b>Definition:</b> bit-stream-utils.h:103</div></div>
+<div class="ttc" id="classarrow_1_1_bit_writer_html_a324ef275bfbcb49d823aa4fbced24446"><div class="ttname"><a href="classarrow_1_1_bit_writer.html#a324ef275bfbcb49d823aa4fbced24446">arrow::BitWriter::Clear</a></div><div class="ttdeci">void Clear()</div><div class="ttdef"><b>Definition:</b> bit-stream-utils.h:45</div></div>
+<div class="ttc" id="classarrow_1_1_bit_reader_html_a20420d2374d3eb9177c5c3a0f5493cd1"><div class="ttname"><a href="classarrow_1_1_bit_reader.html#a20420d2374d3eb9177c5c3a0f5493cd1">arrow::BitReader::GetValue</a></div><div class="ttdeci">bool GetValue(int num_bits, T *v)</div><div class="ttdoc">Gets the next value from the buffer. </div><div class="ttdef"><b>Definition:</b> bit-stream-utils.h:268</div></div>
+<div class="ttc" id="classarrow_1_1_bit_reader_html_a6f023d4ce78bd6a9cbc2f372f441d964"><div class="ttname"><a href="classarrow_1_1_bit_reader.html#a6f023d4ce78bd6a9cbc2f372f441d964">arrow::BitReader::GetBatch</a></div><div class="ttdeci">int GetBatch(int num_bits, T *v, int batch_size)</div><div class="ttdoc">Get a number of values from the buffer. Return the number of values actually read. </div><div class="ttdef"><b>Definition:</b> bit-stream-utils.h:273</div></div>
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