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From u..@apache.org
Subject [43/51] [partial] arrow-site git commit: Rerender docs
Date Tue, 27 Jun 2017 10:00:33 GMT
http://git-wip-us.apache.org/repos/asf/arrow-site/blob/d37aab64/docs/cpp/arrow_2python_2io_8h.html
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+<div class="textblock"><code>#include &quot;<a class="el" href="interfaces_8h_source.html">arrow/io/interfaces.h</a>&quot;</code><br />
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http://git-wip-us.apache.org/repos/asf/arrow-site/blob/d37aab64/docs/cpp/arrow_2python_2io_8h_source.html
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+<div class="title">io.h</div>  </div>
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+<a href="arrow_2python_2io_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><
 span 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 dis
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@@ -70,7 +94,7 @@ $(function() {
 <a href="bit-util_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><span clas
 s="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 distributed 
 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="preprocessor">#ifndef ARROW_UTIL_BIT_UTIL_H</span></div><div class="line"><a name="l00019"></a><span class="linen
 o">   19</span>&#160;<span class="preprocessor">#define ARROW_UTIL_BIT_UTIL_H</span></div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;</div><div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="preprocessor">#include &lt;cstdint&gt;</span></div><div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="preprocessor">#include &lt;limits&gt;</span></div><div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="preprocessor">#include &lt;memory&gt;</span></div><div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</span></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;<span class="preprocessor">#include &quot;<a class="code" href="visibility_8h.html">arrow/util/v
 isibility.h</a>&quot;</span></div><div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;</div><div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacearrow.html">arrow</a> {</div><div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;</div><div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="keyword">class </span>Buffer;</div><div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="keyword">class </span>MemoryPool;</div><div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="keyword">class </span>MutableBuffer;</div><div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="keyword">class </span>Status;</div><div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;</div><div class="line"><
 a name="l00035"></a><span class="lineno"><a class="line" href="namespacearrow_1_1_bit_util.html">   35</a></span>&#160;<span class="keyword">namespace </span>BitUtil {</div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;</div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="keyword">static</span> constexpr uint8_t kBitmask[] = {1, 2, 4, 8, 16, 32, 64, 128};</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="comment">// the ~i byte version of kBitmaks</span></div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="keyword">static</span> constexpr uint8_t kFlippedBitmask[] = {254, 253, 251, 247, 239, 223, 191, 127};</div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;</div><div class="line"><a name="l00042"></a><span 
 class="lineno">   42</span>&#160;<span class="keyword">static</span> <span class="keyword">inline</span> int64_t CeilByte(int64_t size) {</div><div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;  <span class="keywordflow">return</span> (size + 7) &amp; ~7;</div><div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;}</div><div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;</div><div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;<span class="keyword">static</span> <span class="keyword">inline</span> int64_t BytesForBits(int64_t size) {</div><div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;  <span class="keywordflow">return</span> CeilByte(size) / 8;</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">static</span> <span class="keyword">inline</span> int64_t Ceil2Bytes(int64_t size) {</div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;  <span class="keywordflow">return</span> (size + 15) &amp; ~15;</div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;}</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;</div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;<span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> GetBit(<span class="keyword">const</span> uint8_t* bits, int64_t i) {</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;  <span class="keywordflow">return</span> (bits[i / 8] &amp; kBitmask[i % 8]) != 0;</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;}</div><div cla
 ss="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;</div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;<span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> BitNotSet(<span class="keyword">const</span> uint8_t* bits, int64_t i) {</div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;  <span class="keywordflow">return</span> (bits[i / 8] &amp; kBitmask[i % 8]) == 0;</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;<span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> ClearBit(uint8_t* bits, int64_t i) {</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;  bits[i / 
 8] &amp;= kFlippedBitmask[i % 8];</div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;}</div><div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;</div><div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;<span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> SetBit(uint8_t* bits, int64_t i) {</div><div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;  bits[i / 8] |= kBitmask[i % 8];</div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;}</div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;</div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;<span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> SetBitTo(uint8_t* bits, int64_t i, <span class="keywordtype">bool</span> bit_is_set) {<
 /div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;  <span class="comment">// TODO: speed up. See https://graphics.stanford.edu/~seander/bithacks.html</span></div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;  <span class="comment">// &quot;Conditionally set or clear bits without branching&quot;</span></div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;  <span class="keywordflow">if</span> (bit_is_set) {</div><div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;    SetBit(bits, i);</div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;    ClearBit(bits, i);</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;}</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="keyword">static</span> <span class="keyword">inline</span> int64_t NextPower2(int64_t n) {</div><div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;  n--;</div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;  n |= n &gt;&gt; 1;</div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;  n |= n &gt;&gt; 2;</div><div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;  n |= n &gt;&gt; 4;</div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;  n |= n &gt;&gt; 8;</div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;  n |= n &gt;&gt; 16;</div><div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;  n |= n &gt;&g
 t; 32;</div><div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;  n++;</div><div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;  <span class="keywordflow">return</span> n;</div><div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;}</div><div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;</div><div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;<span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> IsMultipleOf64(int64_t n) {</div><div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;  <span class="keywordflow">return</span> (n &amp; 63) == 0;</div><div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;}</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">   9
 6</span>&#160;<span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> IsMultipleOf8(int64_t n) {</div><div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;  <span class="keywordflow">return</span> (n &amp; 7) == 0;</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="l00101"></a><span class="lineno"><a class="line" href="namespacearrow_1_1_bit_util.html#a579a683813940e32133af9e6c6acb2c4">  101</a></span>&#160;<span class="keyword">inline</span> int64_t <a class="code" href="namespacearrow_1_1_bit_util.html#a579a683813940e32133af9e6c6acb2c4">RoundUp</a>(int64_t value, int64_t factor) {</div><div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;  <span class="keywordflow">return</span> (value + (factor - 1)) / factor * factor;</div><div c
 lass="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;}</div><div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;</div><div class="line"><a name="l00105"></a><span class="lineno"><a class="line" href="namespacearrow_1_1_bit_util.html#a2f7b5bcced6e09a6b02315208dec7c5d">  105</a></span>&#160;<span class="keyword">inline</span> int64_t <a class="code" href="namespacearrow_1_1_bit_util.html#a2f7b5bcced6e09a6b02315208dec7c5d">RoundUpToMultipleOf64</a>(int64_t num) {</div><div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;  <span class="comment">// TODO(wesm): is this definitely needed?</span></div><div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;  <span class="comment">// DCHECK_GE(num, 0);</span></div><div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;  constexpr int64_t round_to = 64;</div><div class="line"><a name="l00109"></a><span class="lineno">  109</span>
 &#160;  constexpr int64_t force_carry_addend = round_to - 1;</div><div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;  constexpr int64_t truncate_bitmask = ~(round_to - 1);</div><div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;  constexpr int64_t max_roundable_num = std::numeric_limits&lt;int64_t&gt;::max() - round_to;</div><div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;  <span class="keywordflow">if</span> (num &lt;= max_roundable_num) { <span class="keywordflow">return</span> (num + force_carry_addend) &amp; truncate_bitmask; }</div><div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;  <span class="comment">// handle overflow case.  This should result in a malloc error upstream</span></div><div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;  <span class="keywordflow">return</span> num;</div><div class="line"><a name="l00115"></a><span class="l
 ineno">  115</span>&#160;}</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="keywordtype">void</span> <a class="code" href="namespacearrow_1_1_bit_util.html#af9b78659f3d02ccfebdd1e592add36c8">BytesToBits</a>(<span class="keyword">const</span> std::vector&lt;uint8_t&gt;&amp; bytes, uint8_t* bits);</div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;<a class="code" href="visibility_8h.html#a7060b7b5f11fc11ce77a4d30b37619ef">ARROW_EXPORT</a> <a class="code" href="classarrow_1_1_status.html">Status</a> <a class="code" href="namespacearrow_1_1_bit_util.html#af9b78659f3d02ccfebdd1e592add36c8">BytesToBits</a>(<span class="keyword">const</span> std::vector&lt;uint8_t&gt;&amp;, std::shared_ptr&lt;Buffer&gt;*);</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="comment">// namespace BitUtil</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;<span class="comment">// ----------------------------------------------------------------------</span></div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;<span class="comment">// Bitmap utilities</span></div><div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;</div><div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;<a class="code" href="classarrow_1_1_status.html">Status</a> <a class="code" href="visibility_8h.html#a7060b7b5f11fc11ce77a4d30b37619ef">ARROW_EXPORT</a> <a class="code" href="namespacearrow.html#aad55168cd9074fddb1ce5f103d29c26f">GetEmptyBitmap</a>(</div><div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160
 ;    <a class="code" href="classarrow_1_1_memory_pool.html">MemoryPool</a>* pool, int64_t length, std::shared_ptr&lt;MutableBuffer&gt;* result);</div><div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;</div><div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;<a class="code" href="classarrow_1_1_status.html">Status</a> <a class="code" href="visibility_8h.html#a7060b7b5f11fc11ce77a4d30b37619ef">ARROW_EXPORT</a> <a class="code" href="namespacearrow.html#a5e8c95adb60525560e52951a7c9d425b">CopyBitmap</a>(<a class="code" href="classarrow_1_1_memory_pool.html">MemoryPool</a>* pool, <span class="keyword">const</span> uint8_t* bitmap, int64_t offset,</div><div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;    int64_t length, std::shared_ptr&lt;Buffer&gt;* out);</div><div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;</div><div class="line"><a name="l00147"></a><span class="lineno">  147
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 _offset, int64_t bit_length);</div><div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;}  <span class="comment">// namespace arrow</span></div><div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;</div><div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;<span class="preprocessor">#endif  // ARROW_UTIL_BIT_UTIL_H</span></div><div class="ttc" id="namespacearrow_html_a6009c894cf619352dfc7bb26b7ac15b9"><div class="ttname"><a href="namespacearrow.html#a6009c894cf619352dfc7bb26b7ac15b9">arrow::BitmapEquals</a></div><div class="ttdeci">bool BitmapEquals(const uint8_t *left, int64_t left_offset, const uint8_t *right, int64_t right_offset, int64_t bit_length)</div><div class="ttdef"><b>Definition:</b> bit-util.cc:113</div></div>
 <div class="ttc" id="namespacearrow_1_1_bit_util_html_a2f7b5bcced6e09a6b02315208dec7c5d"><div class="ttname"><a href="namespacearrow_1_1_bit_util.html#a2f7b5bcced6e09a6b02315208dec7c5d">arrow::BitUtil::RoundUpToMultipleOf64</a></div><div class="ttdeci">int64_t RoundUpToMultipleOf64(int64_t num)</div><div class="ttdef"><b>Definition:</b> bit-util.h:105</div></div>
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-<div class="ttc" id="classarrow_1_1_status_html"><div class="ttname"><a href="classarrow_1_1_status.html">arrow::Status</a></div><div class="ttdef"><b>Definition:</b> status.h:88</div></div>
+<div class="ttc" id="classarrow_1_1_status_html"><div class="ttname"><a href="classarrow_1_1_status.html">arrow::Status</a></div><div class="ttdef"><b>Definition:</b> status.h:75</div></div>
 <div class="ttc" id="namespacearrow_html_a3df27e2b05dde85e91db36fec4dd5728"><div class="ttname"><a href="namespacearrow.html#a3df27e2b05dde85e91db36fec4dd5728">arrow::CountSetBits</a></div><div class="ttdeci">int64_t CountSetBits(const uint8_t *data, int64_t bit_offset, int64_t length)</div><div class="ttdoc">Compute the number of 1&amp;#39;s in the given data array. </div><div class="ttdef"><b>Definition:</b> bit-util.cc:57</div></div>
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