http://git-wip-us.apache.org/repos/asf/arrow-site/blob/785c5862/docs/cpp/bit-util_8h_source.html ---------------------------------------------------------------------- diff --git a/docs/cpp/bit-util_8h_source.html b/docs/cpp/bit-util_8h_source.html index 2078158..d829f59 100644 --- a/docs/cpp/bit-util_8h_source.html +++ b/docs/cpp/bit-util_8h_source.html @@ -5,7 +5,7 @@ <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.13"/> <meta name="viewport" content="width=device-width, initial-scale=1"/> -<title>Apache Arrow (C++): /home/wesm/code/arrow/cpp/src/arrow/util/bit-util.h Source File</title> +<title>Apache Arrow (C++): /apache-arrow/arrow/cpp/src/arrow/util/bit-util.h Source File</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> @@ -67,7 +67,7 @@ $(function() { <div class="title">bit-util.h</div> </div> </div><!--header--> <div class="contents"> -<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> <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> <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> <span class="comment">// distributed with this work for additional information</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <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> <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> <span class="comment">// "License"); you may not use this file except in compliance</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <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> <span class="comment">//</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">//</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// Unless required by applicable law or agreed to in writing,</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <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> <span class="comment">// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <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> <span class="comment">// specific language governing permissions and limitations</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">// under the License.</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#ifndef ARROW_UTIL_BIT_UTIL_H</span></div><div class="line"><a name="l00019"></a><span class="linen o"> 19</span> <span class="preprocessor">#define ARROW_UTIL_BIT_UTIL_H</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#if defined(__APPLE__)</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <machine/endian.h></span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#elif defined(_WIN32)</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#define __LITTLE_ENDIAN 1</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <endian.h& gt;</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#if defined(_MSC_VER)</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#define ARROW_BYTE_SWAP64 _byteswap_uint64</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#define ARROW_BYTE_SWAP32 _byteswap_ulong</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00033"></a><span class="lineno"><a class="line" href="bit-util_8h.html#a582fbf29e9f0fbf6dd39031af11a8894"> 33</a></span> <span class="preprocessor">#define A RROW_BYTE_SWAP64 __builtin_bswap64</span></div><div class="line"><a name="l00034"></a><span class="lineno"><a class="line" href="bit-util_8h.html#a4fabecc746b1f8c287ca27cebdfb3eee"> 34</a></span> <span class="preprocessor">#define ARROW_BYTE_SWAP32 __builtin_bswap32</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#include <cstdint></span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#include <limits></span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#include <memory></span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> < span class="preprocessor">#include <vector></span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#include "<a class="code" href="macros_8h.html">arrow/util/macros.h</a>"</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#include "<a class="code" href="visibility_8h.html">arrow/util/visibility.h</a>"</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> </div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#ifdef ARROW_USE_SSE</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor">#include "<a class="code" href="cpu-info_8h.html">arrow/util/cpu-info.h</a>"</span></div><div class="line" ><a name="l00047"></a><span class="lineno"> 47</span> <span >class="preprocessor">#include "<a class="code" >href="sse-util_8h.html">arrow/util/sse-util.h</a>"</span></div><div >class="line"><a name="l00048"></a><span class="lineno"> >48</span> <span class="preprocessor">#endif</span></div><div >class="line"><a name="l00049"></a><span class="lineno"> >49</span> </div><div class="line"><a name="l00050"></a><span >class="lineno"> 50</span> <span class="keyword">namespace </span><a >class="code" href="namespacearrow.html">arrow</a> {</div><div class="line"><a >name="l00051"></a><span class="lineno"> 51</span> </div><div >class="line"><a name="l00052"></a><span class="lineno"><a class="line" >href="bit-util_8h.html#a760bf109287895672418b5a7855d4464"> >52</a></span> <span class="preprocessor">#define >INIT_BITSET(valid_bits_vector, valid_bits_index) >\</span></div><div class="line"><a name="l00053"></a><span class="lineno"> >53</span> 0;<span class="preprocessor"> int64_t byte_offset_##valid_bits_vector = (valid_bits_index) / 8; \</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor"> int64_t bit_offset_##valid_bits_vector = (valid_bits_index) % 8; \</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="preprocessor"> uint8_t bitset_##valid_bits_vector = valid_bits_vector[byte_offset_##valid_bits_vector];</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div><div class="line"><a name="l00057"></a><span class="lineno"><a class="line" href="bit-util_8h.html#abd53b6fe5d0ee60b928d2813f89422cf"> 57</a></span> <span class="preprocessor">#define READ_NEXT_BITSET(valid_bits_vector) \</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="preprocessor"> bit_offset_##valid _bits_vector++; \</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="preprocessor"> if (bit_offset_##valid_bits_vector == 8) { \</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="preprocessor"> bit_offset_##valid_bits_vector = 0; \</span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="preprocessor"> byte_offset_##valid_bits_vector++; \</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="preprocessor"> bitset_##valid_bits_vector = valid_bits_vector[byte_offset_##valid_bits_vector]; \</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocesso r"> }</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> </div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment">// TODO(wesm): The source from Impala was depending on boost::make_unsigned</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment">//</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment">// We add a partial stub implementation here</span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="keyword">namespace </span>detail {</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="keyword">template</span> <<span class="ke yword">typename</span> T></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="keyword">struct </span>make_unsigned {};</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="keyword">template</span> <></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="keyword">struct </span>make_unsigned<int8_t> {</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keyword">typedef</span> uint8_t type;</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> };</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="keyword">template</span> <></div><div class="line"><a name=" l00080"></a><span class="lineno"> 80</span> <span class="keyword">struct </span>make_unsigned<int16_t> {</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keyword">typedef</span> uint16_t type;</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> };</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="keyword">template</span> <></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="keyword">struct </span>make_unsigned<int32_t> {</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keyword">typedef</span> uint32_t type;</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> };</div><div class="line"><a name="l00088"></a><span class="lineno"> 8 8</span> </div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="keyword">template</span> <></div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="keyword">struct </span>make_unsigned<int64_t> {</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keyword">typedef</span> uint64_t type;</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> };</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> </div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> } <span class="comment">// namespace detail</span></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="keyword">class </span>Buffer;</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="keyword">class </span>MemoryPool;</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="keyword">class </span>MutableBuffer;</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="keyword">class </span>Status;</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> </div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="keyword">namespace </span>BitUtil {</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> </div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="keyword">static</span> constexpr uint8_t kBitmask[] = {1, 2, 4, 8, 16, 32, 64, 128};</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> </div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span clas s="comment">// the ~i byte version of kBitmaks</span></div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="keyword">static</span> constexpr uint8_t kFlippedBitmask[] = {254, 253, 251, 247, 239, 223, 191, 127};</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="keyword">static</span> <span class="keyword">inline</span> int64_t CeilByte(int64_t size) { <span class="keywordflow">return</span> (size + 7) & ~7; }</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> </div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="keyword">static</span> <span class="keyword">inline</span> int64_t BytesForBits(int64_t size) { <span class="keywordflow">return</span> CeilByte(size) / 8; }</div><div class="line"><a name="l00111"></a><span class="lineno"> 111< /span> </div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="keyword">static</span> <span class="keyword">inline</span> int64_t Ceil2Bytes(int64_t size) { <span class="keywordflow">return</span> (size + 15) & ~15; }</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> </div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <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="l00115"></a><span class="lineno"> 115</span>  <span class="keywordflow">return</span> (bits[i / 8] & kBitmask[i % 8]) != 0;</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> }</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span> </div><div class="line"><a name="l00118"></a><s pan class="lineno"> 118</span> <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="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">return</span> (bits[i / 8] & kBitmask[i % 8]) == 0;</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> }</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> </div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <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="l00123"></a><span class="lineno"> 123</span>  bits[i / 8] &= kFlippedBitmask[i % 8];</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  }</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> </div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> SetBit(uint8_t* bits, int64_t i) { bits[i / 8] |= kBitmask[i % 8]; }</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> SetArrayBit(uint8_t* bits, <span class="keywordtype">int</span> i, <span class="keywordtype">bool</span> is_set) {</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keywordflow">if</span> (is_set) {</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  SetBit(bits, i);</div><div class="line "><a name="l00132"></a><span class="lineno"> 132</span>  }</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span> }</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span> </div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <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="l00136"></a><span class="lineno"> 136</span>  <span class="comment">// TODO: speed up. See https://graphics.stanford.edu/~seander/bithacks.html</span></div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="comment">// "Conditionally set or clear bits without branching"</span></div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordflow">if </span> (bit_is_set) {</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  SetBit(bits, i);</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  ClearBit(bits, i);</div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  }</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span> }</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> </div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="comment">// Returns the minimum number of bits needed to represent the value of 'x'</span></div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">int</ span> NumRequiredBits(uint64_t x) {</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 63; i >= 0; --i) {</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keywordflow">if</span> (x & (UINT64_C(1) << i)) <span class="keywordflow">return</span> i + 1;</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  }</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span> }</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span> </div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="keyword">static</span> <span class="keyword">inline</span> int64_t NextPower2(int64_t n) { </div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  n--;</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  n |= n >> 1;</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  n |= n >> 2;</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  n |= n >> 4;</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  n |= n >> 8;</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  n |= n >> 16;</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  n |= n >> 32;</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  n++;</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordflow">return</span> n;</div><div class="line"><a name="l00167"></a><span class="linen o"> 167</span> }</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span> </div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> IsMultipleOf64(int64_t n) { <span class="keywordflow">return</span> (n & 63) == 0; }</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span> </div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> IsMultipleOf8(int64_t n) { <span class="keywordflow">return</span> (n & 7) == 0; }</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span> </div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="keyword">static</span> <span class="keyword">inline</span> int64 _t Ceil(int64_t value, int64_t divisor) {</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keywordflow">return</span> value / divisor + (value % divisor != 0);</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span> }</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span> </div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span> <span class="keyword">inline</span> int64_t RoundUp(int64_t value, int64_t factor) {</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keywordflow">return</span> (value + (factor - 1)) / factor * factor;</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span> }</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span> </div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span> <span class="keyword">static</sp an> <span class="keyword">inline</span> int64_t RoundDown(int64_t value, int64_t factor) {</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keywordflow">return</span> (value / factor) * factor;</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span> }</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span> </div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">int</span> RoundUpToPowerOf2(<span class="keywordtype">int</span> value, <span class="keywordtype">int</span> factor) {</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="comment">// DCHECK((factor > 0) && ((factor & (factor - 1)) == 0));</span></div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  <span class ="keywordflow">return</span> (value + (factor - 1)) & ~(factor - 1);</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span> }</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span> </div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">int</span> RoundDownToPowerOf2(<span class="keywordtype">int</span> value, <span class="keywordtype">int</span> factor) {</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="comment">// DCHECK((factor > 0) && ((factor & (factor - 1)) == 0));</span></div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keywordflow">return</span> value & ~(factor - 1);</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span> }</div><div class="line"><a n ame="l00199"></a><span class="lineno"> 199</span> </div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint32_t RoundUpNumBytes(uint32_t bits) { <span class="keywordflow">return</span> (bits + 7) >> 3; }</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span> </div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint32_t RoundDownNumBytes(uint32_t bits) { <span class="keywordflow">return</span> bits >> 3; }</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span> </div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint32_t RoundUpNumi32(uint32_t bits) { <span class="keywordflow">return</span> (bits + 31) >& gt; 5; }</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span> </div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint32_t RoundDownNumi32(uint32_t bits) { <span class="keywordflow">return</span> bits >> 5; }</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span> </div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint32_t RoundUpNumi64(uint32_t bits) { <span class="keywordflow">return</span> (bits + 63) >> 6; }</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span> </div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint32_t RoundDownNumi64(uint32_t bits) { <span class="keywordfl ow">return</span> bits >> 6; }</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span> </div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="keyword">template</span> <<span class="keywordtype">int</span>64_t ROUND_TO></div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span> <span class="keyword">static</span> <span class="keyword">inline</span> int64_t RoundToPowerOfTwo(int64_t num) {</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="comment">// TODO(wesm): is this definitely needed?</span></div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="comment">// DCHECK_GE(num, 0);</span></div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  constexpr int64_t force_carry_addend = ROUND_TO - 1;</div><div class="line"><a name="l00225"></a><span class="lineno"> 225< /span>  constexpr int64_t truncate_bitmask = ~(ROUND_TO - 1);</div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  constexpr int64_t max_roundable_num = std::numeric_limits<int64_t>::max() - ROUND_TO;</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="keywordflow">if</span> (num <= max_roundable_num) {</div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="keywordflow">return</span> (num + force_carry_addend) & truncate_bitmask;</div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  }</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="comment">// handle overflow case. This should result in a malloc error upstream</span></div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <span class="keywordflow">return</span> num;</div><div class="l ine"><a name="l00232"></a><span class="lineno"> 232</span> }</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span> </div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="keyword">static</span> <span class="keyword">inline</span> int64_t RoundUpToMultipleOf64(int64_t num) {</div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keywordflow">return</span> RoundToPowerOfTwo<64>(num);</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span> }</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span> </div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span> <span class="keyword">static</span> <span class="keyword">inline</span> int64_t RoundUpToMultipleOf8(int64_t num) {</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="keywordflow">return</ span> RoundToPowerOfTwo<8>(num);</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span> }</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span> </div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">int</span> PopcountNoHw(uint64_t x) {</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="keywordtype">int</span> count = 0;</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keywordflow">for</span> (; x != 0; ++count) x &= x - 1;</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  <span class="keywordflow">return</span> count;</div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span> }</div><div class="line"><a name="l00250"></a><span class="linen o"> 250</span> </div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">int</span> Popcount(uint64_t x) {</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span> <span class="preprocessor">#ifdef ARROW_USE_SSE</span></div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <span class="keywordflow">if</span> (<a class="code" href="macros_8h.html#a1f418a9edc46d53e62732e7ccd06f329">ARROW_PREDICT_TRUE</a>(<a class="code" href="classarrow_1_1_cpu_info.html#ad111f08ae6a89fcc8c47b4fac7a32a3f">CpuInfo::IsSupported</a>(<a class="code" href="classarrow_1_1_cpu_info.html#ae342a62dfe1a66ddf9dfd8c2b5374a39">CpuInfo::POPCNT</a>))) {</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="keywordflow">return</span> POPCNT_popcnt_u64(x);</div><div class="line"><a name="l0 0256"></a><span class="lineno"> 256</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordflow">return</span> PopcountNoHw(x);</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  }</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="keywordflow">return</span> PopcountNoHw(x);</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span> }</div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span> </div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span> <span class="comment">// Compute correct population count for various-width signed integers</span></div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">int</span> PopcountSigned(T v) {</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <span class="comment">// Converting to same-width unsigned then extending preserves the bit pattern.</span></div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="keywordflow">return</span> BitUtil::Popcount(<span class="keyword">static_cast<</span>typename detail::make_unsigned<T>::type<span class="keyword">></span>(v));</div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  }</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span> </div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint64_t TrailingBits(uint64_t v, <span class="keywordtype">int</span> num_bits) {</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="keywordflow">if</span> (<a class="code" href="macros_8h.html#a6f2ee7ad52872edb915cf48e163ac99c">ARROW_PREDICT_FALSE</a>(num_bits == 0)) <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  <span class="keywordflow">if</span> (<a class="code" href="macros_8h.html#a6f2ee7ad52872edb915cf48e163ac99c">ARROW_PREDICT_FALSE</a>(num_bits >= 64)) <span class="keywordflow">return</span> v;</div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <span class="keywordtype">int< /span> n = 64 - num_bits;</div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="keywordflow">return</span> (v << n) >> n;</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span> }</div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span> </div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">int</span> Log2(uint64_t x) {</div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  <span class="comment">// DCHECK_GT(x, 0);</span></div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordflow">if</span> (x == 1) <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="comment">// Compute result = ceil( log2(x))</span></div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="comment">// = floor(log2(x - 1)) + 1, for x > 1</span></div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="comment">// by finding the position of the most significant bit (1-indexed) of x - 1</span></div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="comment">// (floor(log2(n)) = MSB(n) (0-indexed))</span></div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  --x;</div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="keywordtype">int</span> result = 1;</div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  <span class="keywordflow">while</span> (x >>= 1) ++result;</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordflow">return</span> result;</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span> }</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span> </div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span> <span class="keyword">static</span> <span class="keyword">inline</span> int64_t ByteSwap(int64_t value) { <span class="keywordflow">return</span> <a class="code" href="bit-util_8h.html#a582fbf29e9f0fbf6dd39031af11a8894">ARROW_BYTE_SWAP64</a>(value); }</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint64_t ByteSwap(uint64_t value) {</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="keywordflow">return</span> <span class="keyword">static_cast<</span>uint64_t<span class="keyword">></span>(<a class="code" href="bit-util_8h.html#a582fbf29e 9f0fbf6dd39031af11a8894">ARROW_BYTE_SWAP64</a>(value));</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span> }</div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span> <span class="keyword">static</span> <span class="keyword">inline</span> int32_t ByteSwap(int32_t value) { <span class="keywordflow">return</span> <a class="code" href="bit-util_8h.html#a4fabecc746b1f8c287ca27cebdfb3eee">ARROW_BYTE_SWAP32</a>(value); }</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint32_t ByteSwap(uint32_t value) {</div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <span class="keywordflow">return</span> <span class="keyword">static_cast<</span>uint32_t<span class="keyword">></span>(<a class="code" href="bit-util_8h.html#a4fabecc746b1f8c287ca27cebdfb3eee">ARROW_BYTE_SWAP32</a>(value));</div><div clas s="line"><a name="l00303"></a><span class="lineno"> 303</span> }</div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span> <span class="keyword">static</span> <span class="keyword">inline</span> int16_t ByteSwap(int16_t value) {</div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  constexpr int16_t m = <span class="keyword">static_cast<</span>int16_t<span class="keyword">></span>(0xff);</div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="keywordflow">return</span> <span class="keyword">static_cast<</span>int16_t<span class="keyword">></span>(((value >> 8) & m) | ((value & m) << 8));</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span> }</div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint16_t ByteSwap(uint16_t value) {</div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="keywordflow">return</span> <span class="keyword">static_cast<</span>uint16_t<span class="keyword">></span>(ByteSwap(static_cast<int16_t>(value)));</div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span> }</div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span> </div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> ByteSwap(<span class="keywordtype">void</span>* dst, <span class="keyword">const</span> <span class="keywordtype">void</span>* src, <span class="keywordtype">int</span> len) {</div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keywordflow">switch</span> (len) {</div><div class="line"><a name="l00315"></a><span class="li neno"> 315</span>  <span class="keywordflow">case</span> 1:</div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  *<span class="keyword">reinterpret_cast<</span>int8_t*<span class="keyword">></span>(dst) = *reinterpret_cast<const int8_t*>(src);</div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <span class="keywordflow">case</span> 2:</div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  *<span class="keyword">reinterpret_cast<</span>int16_t*<span class="keyword">></span>(dst) = ByteSwap(*reinterpret_cast<const int16_t*>(src));</div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <span class="keywordflow">return</span>;</div><div class="line"><a name="l00321"></a><span class="lineno" > 321</span>  <span class="keywordflow">case</span> 4:</div><div > class="line"><a name="l00322"></a><span class="lineno"> 322</span>  > *<span class="keyword">reinterpret_cast<</span>int32_t*<span > class="keyword">></span>(dst) = ByteSwap(*reinterpret_cast<const > int32_t*>(src));</div><div class="line"><a name="l00323"></a><span > class="lineno"> 323</span>  <span > class="keywordflow">return</span>;</div><div class="line"><a > name="l00324"></a><span class="lineno"> 324</span>  <span > class="keywordflow">case</span> 8:</div><div class="line"><a > name="l00325"></a><span class="lineno"> 325</span>  *<span > class="keyword">reinterpret_cast<</span>int64_t*<span > class="keyword">></span>(dst) = ByteSwap(*reinterpret_cast<const > int64_t*>(src));</div><div class="line"><a name="l00326"></a><span > class="lineno"> 326</span>  <span > class="keywordflow">return</span>;</div><div class="line"><a > name="l00327"></a><span class=" lineno"> 327</span>  <span class="keywordflow">default</span>:</div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  }</div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span> </div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  uint8_t* d = <span class="keyword">reinterpret_cast<</span>uint8_t*<span class="keyword">></span>(dst);</div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="keyword">const</span> uint8_t* s = <span class="keyword">reinterpret_cast<</span><span class="keyword">const </span>uint8_t*<span class="keyword">></span>(src);</div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0 ; i < len; ++i) {</div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  d[i] = s[len - i - 1];</div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  }</div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span> }</div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span> </div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span> <span class="preprocessor">#if __BYTE_ORDER == __LITTLE_ENDIAN</span></div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span> <span class="keyword">static</span> <span class="keyword">inline</span> int64_t ToBigEndian(int64_t value) { <span class="keywordflow">return</span> ByteSwap(value); }</div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint64_t ToBigEndian(uint64_t value) { <span class= "keywordflow">return</span> ByteSwap(value); }</div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span> <span class="keyword">static</span> <span class="keyword">inline</span> int32_t ToBigEndian(int32_t value) { <span class="keywordflow">return</span> ByteSwap(value); }</div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint32_t ToBigEndian(uint32_t value) { <span class="keywordflow">return</span> ByteSwap(value); }</div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span> <span class="keyword">static</span> <span class="keyword">inline</span> int16_t ToBigEndian(int16_t value) { <span class="keywordflow">return</span> ByteSwap(value); }</div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint16_t ToBigEndian(uint16_t value) { < span class="keywordflow">return</span> ByteSwap(value); }</div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span> <span class="keyword">static</span> <span class="keyword">inline</span> int64_t ToBigEndian(int64_t val) { <span class="keywordflow">return</span> val; }</div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint64_t ToBigEndian(uint64_t val) { <span class="keywordflow">return</span> val; }</div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span> <span class="keyword">static</span> <span class="keyword">inline</span> int32_t ToBigEndian(int32_t val) { <span class="keywordflow">return</span> val; }</div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span> <span class="keyword ">static</span> <span class="keyword">inline</span> uint32_t ToBigEndian(uint32_t val) { <span class="keywordflow">return</span> val; }</div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span> <span class="keyword">static</span> <span class="keyword">inline</span> int16_t ToBigEndian(int16_t val) { <span class="keywordflow">return</span> val; }</div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint16_t ToBigEndian(uint16_t val) { <span class="keywordflow">return</span> val; }</div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span> </div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span> <span class="preprocessor">#if __BYTE_ORDER == __LITTLE_ENDIAN</span></div><div class="line">< a name="l00358"></a><span class="lineno"> 358</span> <span class="keyword">static</span> <span class="keyword">inline</span> int64_t FromBigEndian(int64_t value) { <span class="keywordflow">return</span> ByteSwap(value); }</div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint64_t FromBigEndian(uint64_t value) { <span class="keywordflow">return</span> ByteSwap(value); }</div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span> <span class="keyword">static</span> <span class="keyword">inline</span> int32_t FromBigEndian(int32_t value) { <span class="keywordflow">return</span> ByteSwap(value); }</div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint32_t FromBigEndian(uint32_t value) { <span class="keywordflow">return</span> ByteSwap(value); }</div> <div class="line"><a name="l00362"></a><span class="lineno"> 362</span> <span class="keyword">static</span> <span class="keyword">inline</span> int16_t FromBigEndian(int16_t value) { <span class="keywordflow">return</span> ByteSwap(value); }</div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint16_t FromBigEndian(uint16_t value) { <span class="keywordflow">return</span> ByteSwap(value); }</div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span> <span class="keyword">static</span> <span class="keyword">inline</span> int64_t FromBigEndian(int64_t val) { <span class="keywordflow">return</span> val; }</div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span> <span class="keyword">static</span> <span class=" keyword">inline</span> uint64_t FromBigEndian(uint64_t val) { <span class="keywordflow">return</span> val; }</div><div class="line"><a name="l00367"></a><span class="lineno"> 367</span> <span class="keyword">static</span> <span class="keyword">inline</span> int32_t FromBigEndian(int32_t val) { <span class="keywordflow">return</span> val; }</div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint32_t FromBigEndian(uint32_t val) { <span class="keywordflow">return</span> val; }</div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span> <span class="keyword">static</span> <span class="keyword">inline</span> int16_t FromBigEndian(int16_t val) { <span class="keywordflow">return</span> val; }</div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint16_t FromB igEndian(uint16_t val) { <span class="keywordflow">return</span> val; }</div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span> </div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span> <span class="comment">// Logical right shift for signed integer types</span></div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span> <span class="comment">// This is needed because the C >> operator does arithmetic right shift</span></div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span> <span class="comment">// Negative shift amounts lead to undefined behavior</span></div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l 00377"></a><span class="lineno"> 377</span> <span class="keyword">static</span> T ShiftRightLogical(T v, <span class="keywordtype">int</span> shift) {</div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  <span class="comment">// Conversion to unsigned ensures most significant bits always filled with 0's</span></div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <span class="keywordflow">return</span> <span class="keyword">static_cast<</span>typename detail::make_unsigned<T>::type<span class="keyword">></span>(v) >> shift;</div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span> }</div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span> </div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span> <span class="keywordtype">void</span> FillBitsFromBytes(<span class="keyword">const</span> std::vector<uint8_t>& b ytes, uint8_t* bits);</div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span> </div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span> ARROW_EXPORT</div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span> Status BytesToBits(<span class="keyword">const</span> std::vector<uint8_t>&, MemoryPool*, std::shared_ptr<Buffer>*);</div><div class="line"><a name="l00387"></a><span class="lineno"> 387</span> </div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span> } <span class="comment">// namespace BitUtil</span></div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span> </div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span> <span class="comment">// ----------------------------------------------------------------------</span></div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span> <span class="comment">// Bitmap utilities</span></div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span> </div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span> ARROW_EXPORT</div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span> Status <a class="code" href="namespacearrow.html#a8aab5a752c3a15eda9fe6e63e7d4cefc">GetEmptyBitmap</a>(MemoryPool* pool, int64_t length, std::shared_ptr<Buffer>* result);</div><div class="line"><a name="l00395"></a><span class="lineno"> 395</span> </div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span> ARROW_EXPORT</div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span> Status <a class="code" href="namespacearrow.html#a1c03d877f99bfaa805ee74094e4bcd32">CopyBitmap</a>(MemoryPool* pool, <span class="keyword">const</span> uint8_t* bitmap, int64_t offset, int64_t length,</div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  std::shared_ptr<Buffer>* out);</div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span> </div><div class="line"><a name="l00416"></a><span class="lineno"> 416</span> ARROW_EXPORT</div><div class="line"><a name="l00417"></a><span class="lineno"> 417</span> int64_t <a class="code" href="namespacearrow.html#a55c87c046a937101489a68dd331470ff">CountSetBits</a>(<span class="keyword">const</span> uint8_t* data, int64_t bit_offset, int64_t length);</div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span> </div><div class="line"><a name="l00419"></a><span class="lineno"> 419</span> ARROW_EXPORT</div><div class="line"><a name="l00420"></a><span class="lineno"> 420</span> <span class="keywordtype">bool</span> <a class="code" href="namespacearrow.html#ae3f12b6dd91eb0b7235e50236c7ed85a">BitmapEquals</a>(<span class="keyword">const</span> uint8_t* left, int64_t left _offset, <span class="keyword">const</span> uint8_t* right,</div><div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  int64_t right_offset, int64_t bit_length);</div><div class="line"><a name="l00422"></a><span class="lineno"> 422</span> </div><div class="line"><a name="l00423"></a><span class="lineno"> 423</span> <span class="preprocessor">#ifndef ARROW_NO_DEPRECATED_API</span></div><div class="line"><a name="l00424"></a><span class="lineno"> 424</span> ARROW_EXPORT</div><div class="line"><a name="l00426"></a><span class="lineno"> 426</span> Status <a class="code" href="namespacearrow.html#a8aab5a752c3a15eda9fe6e63e7d4cefc">GetEmptyBitmap</a>(MemoryPool* pool, int64_t length,</div><div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  std::shared_ptr<MutableBuffer>* result);</div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span> <span cla ss="preprocessor">#endif</span></div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span> </div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span> } <span class="comment">// namespace arrow</span></div><div class="line"><a name="l00431"></a><span class="lineno"> 431</span> </div><div class="line"><a name="l00432"></a><span class="lineno"> 432</span> <span class="preprocessor">#endif // ARROW_UTIL_BIT_UTIL_H</span></div><div class="ttc" id="namespacearrow_html_a8aab5a752c3a15eda9fe6e63e7d4cefc"><div class="ttname"><a href="namespacearrow.html#a8aab5a752c3a15eda9fe6e63e7d4cefc">arrow::GetEmptyBitmap</a></div><div class="ttdeci">Status GetEmptyBitmap(MemoryPool *pool, int64_t length, std::shared_ptr< Buffer > *result)</div></div> +<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> <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> <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> <span class="comment">// distributed with this work for additional information</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <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> <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> <span class="comment">// "License"); you may not use this file except in compliance</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <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> <span class="comment">//</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">//</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// Unless required by applicable law or agreed to in writing,</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <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> <span class="comment">// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <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> <span class="comment">// specific language governing permissions and limitations</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">// under the License.</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#ifndef ARROW_UTIL_BIT_UTIL_H</span></div><div class="line"><a name="l00019"></a><span class="linen o"> 19</span> <span class="preprocessor">#define ARROW_UTIL_BIT_UTIL_H</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#if defined(__APPLE__)</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <machine/endian.h></span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#elif defined(_WIN32)</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#define __LITTLE_ENDIAN 1</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <endian.h& gt;</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#if defined(_MSC_VER)</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#define ARROW_BYTE_SWAP64 _byteswap_uint64</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#define ARROW_BYTE_SWAP32 _byteswap_ulong</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00033"></a><span class="lineno"><a class="line" href="bit-util_8h.html#a582fbf29e9f0fbf6dd39031af11a8894"> 33</a></span> <span class="preprocessor">#define A RROW_BYTE_SWAP64 __builtin_bswap64</span></div><div class="line"><a name="l00034"></a><span class="lineno"><a class="line" href="bit-util_8h.html#a4fabecc746b1f8c287ca27cebdfb3eee"> 34</a></span> <span class="preprocessor">#define ARROW_BYTE_SWAP32 __builtin_bswap32</span></div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#include <cstdint></span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#include <limits></span></div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#include <memory></span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> < span class="preprocessor">#include <vector></span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#include "<a class="code" href="macros_8h.html">arrow/util/macros.h</a>"</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#include "<a class="code" href="visibility_8h.html">arrow/util/visibility.h</a>"</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> </div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#ifdef ARROW_USE_SSE</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor">#include "<a class="code" href="cpu-info_8h.html">arrow/util/cpu-info.h</a>"</span></div><div class="line" ><a name="l00047"></a><span class="lineno"> 47</span> <span >class="preprocessor">#include "<a class="code" >href="sse-util_8h.html">arrow/util/sse-util.h</a>"</span></div><div >class="line"><a name="l00048"></a><span class="lineno"> >48</span> <span class="preprocessor">#endif</span></div><div >class="line"><a name="l00049"></a><span class="lineno"> >49</span> </div><div class="line"><a name="l00050"></a><span >class="lineno"> 50</span> <span class="keyword">namespace </span><a >class="code" href="namespacearrow.html">arrow</a> {</div><div class="line"><a >name="l00051"></a><span class="lineno"> 51</span> </div><div >class="line"><a name="l00052"></a><span class="lineno"> >52</span> <span class="preprocessor">#ifndef >ARROW_NO_DEPRECATED_API</span></div><div class="line"><a >name="l00053"></a><span class="lineno"> 53</span> </div><div >class="line"><a name="l00054"></a><span class="lineno"> >54</span> <span class="comment">// \depr ecated Since > 0.7.0</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div><div class="line"><a name="l00056"></a><span class="lineno"><a class="line" href="bit-util_8h.html#a760bf109287895672418b5a7855d4464"> 56</a></span> <span class="preprocessor">#define INIT_BITSET(valid_bits_vector, valid_bits_index) \</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor"> int64_t byte_offset_##valid_bits_vector = (valid_bits_index) / 8; \</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="preprocessor"> int64_t bit_offset_##valid_bits_vector = (valid_bits_index) % 8; \</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="preprocessor"> uint8_t bitset_##valid_bits_vector = valid_bits_vector[byte_offset_##valid_bits_vector];</span></div><div class="line"><a name="l00 060"></a><span class="lineno"> 60</span> </div><div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="bit-util_8h.html#abd53b6fe5d0ee60b928d2813f89422cf"> 61</a></span> <span class="preprocessor">#define READ_NEXT_BITSET(valid_bits_vector) \</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="preprocessor"> bit_offset_##valid_bits_vector++; \</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor"> if (bit_offset_##valid_bits_vector == 8) { \</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="preprocessor"> bit_offset_##valid_bits_vector = 0; \</span></div><div class="line"><a name="l00065"></a><span clas s="lineno"> 65</span> <span class="preprocessor"> byte_offset_##valid_bits_vector++; \</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="preprocessor"> bitset_##valid_bits_vector = valid_bits_vector[byte_offset_##valid_bits_vector]; \</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="preprocessor"> }</span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment">// TODO(wesm): The source from Impala was depending on boost::make_unsigned</span></div><div class="line"><a name="l00072"></ a><span class="lineno"> 72</span> <span class="comment">//</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment">// We add a partial stub implementation here</span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="keyword">namespace </span>detail {</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> </div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="keyword">struct </span>make_unsigned {};</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>& #160;<span class="keyword">template</span> <></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="keyword">struct </span>make_unsigned<int8_t> {</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keyword">typedef</span> uint8_t type;</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> };</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="keyword">template</span> <></div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="keyword">struct </span>make_unsigned<int16_t> {</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keyword">typedef</span> uint16_t type;</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</s pan> };</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="keyword">template</span> <></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="keyword">struct </span>make_unsigned<int32_t> {</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keyword">typedef</span> uint32_t type;</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> };</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="keyword">template</span> <></div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="keyword">struct </span>make_unsigned<int64_t> {</div><div class="line"><a name="l 00097"></a><span class="lineno"> 97</span>  <span class="keyword">typedef</span> uint64_t type;</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> };</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> } <span class="comment">// namespace detail</span></div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="keyword">class </span>Buffer;</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="keyword">class </span>MemoryPool;</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="keyword">class </span>MutableBuffer;</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="keyword">class </sp an>Status;</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> </div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="keyword">namespace </span>BitUtil {</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> </div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="keyword">static</span> constexpr uint8_t kBitmask[] = {1, 2, 4, 8, 16, 32, 64, 128};</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> </div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment">// the ~i byte version of kBitmaks</span></div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="keyword">static</span> constexpr uint8_t kFlippedBitmask[] = {254, 253, 251, 247, 239, 223, 191, 127};</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</spa n> </div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="keyword">static</span> <span class="keyword">inline</span> int64_t CeilByte(int64_t size) { <span class="keywordflow">return</span> (size + 7) & ~7; }</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> </div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="keyword">static</span> <span class="keyword">inline</span> int64_t BytesForBits(int64_t size) { <span class="keywordflow">return</span> CeilByte(size) / 8; }</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span> </div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="keyword">static</span> <span class="keyword">inline</span> int64_t Ceil2Bytes(int64_t size) { <span class="keywordflow">return</span> (size + 15) & ~15; }</div><div class="line"><a name="l00119"></a><span class="lin eno"> 119</span> </div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <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="l00121"></a><span class="lineno"> 121</span>  <span class="keywordflow">return</span> (bits[i / 8] & kBitmask[i % 8]) != 0;</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> }</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> </div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <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="l00125"></a><span class="lineno"> 125</span>  <span class="keywordflo w">return</span> (bits[i / 8] & kBitmask[i % 8]) == 0;</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> }</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <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="l00129"></a><span class="lineno"> 129</span>  bits[i / 8] &= kFlippedBitmask[i % 8];</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> }</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span> </div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> SetBit(uint8_t* bits, int64_t i) { bits[i / 8] |= kBitmask[i % 8]; }</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span> </div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> SetArrayBit(uint8_t* bits, <span class="keywordtype">int</span> i, <span class="keywordtype">bool</span> is_set) {</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordflow">if</span> (is_set) {</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  SetBit(bits, i);</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  }</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> }</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span> </div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span clas s="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="l00142"></a><span class="lineno"> 142</span>  <span class="comment">// TODO: speed up. See https://graphics.stanford.edu/~seander/bithacks.html</span></div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="comment">// "Conditionally set or clear bits without branching"</span></div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keywordflow">if</span> (bit_is_set) {</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  SetBit(bits, i);</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</sp an>  ClearBit(bits, i);</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  }</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span> }</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span> </div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="comment">// Returns the minimum number of bits needed to represent the value of 'x'</span></div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">int</span> NumRequiredBits(uint64_t x) {</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 63; i >= 0; --i) {</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keywor dflow">if</span> (x & (UINT64_C(1) << i)) <span class="keywordflow">return</span> i + 1;</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  }</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span> }</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span> </div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="keyword">static</span> <span class="keyword">inline</span> int64_t NextPower2(int64_t n) {</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  n--;</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  n |= n >> 1;</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  n |= n >> 2;</div><div class="line"><a nam e="l00167"></a><span class="lineno"> 167</span>  n |= n >> 4;</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  n |= n >> 8;</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  n |= n >> 16;</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  n |= n >> 32;</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  n++;</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keywordflow">return</span> n;</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span> }</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span> </div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> IsMultipleOf64(int64_t n) { <span class="keywordflow">return</span> (n & 63) == 0; }</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span> </div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> IsMultipleOf8(int64_t n) { <span class="keywordflow">return</span> (n & 7) == 0; }</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span> </div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="keyword">static</span> <span class="keyword">inline</span> int64_t Ceil(int64_t value, int64_t divisor) {</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="keywordflow">return</span> value / divisor + (value % divisor != 0);</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span> }</div><div class="line"><a name="l0 0183"></a><span class="lineno"> 183</span> </div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span> <span class="keyword">inline</span> int64_t RoundUp(int64_t value, int64_t factor) {</div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keywordflow">return</span> (value + (factor - 1)) / factor * factor;</div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span> }</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span> </div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="keyword">static</span> <span class="keyword">inline</span> int64_t RoundDown(int64_t value, int64_t factor) {</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="keywordflow">return</span> (value / factor) * factor;</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span> }< /div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span> </div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">int</span> RoundUpToPowerOf2(<span class="keywordtype">int</span> value, <span class="keywordtype">int</span> factor) {</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="comment">// DCHECK((factor > 0) && ((factor & (factor - 1)) == 0));</span></div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keywordflow">return</span> (value + (factor - 1)) & ~(factor - 1);</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span> }</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span> </div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <sp an class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">int</span> RoundDownToPowerOf2(<span class="keywordtype">int</span> value, <span class="keywordtype">int</span> factor) {</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="comment">// DCHECK((factor > 0) && ((factor & (factor - 1)) == 0));</span></div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="keywordflow">return</span> value & ~(factor - 1);</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span> }</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span> </div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint32_t RoundUpNumBytes(uint32_t bits) { <span class="keywordflow">return</span> (bits + 7) >> 3; }</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span> </div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint32_t RoundDownNumBytes(uint32_t bits) { <span class="keywordflow">return</span> bits >> 3; }</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span> </div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span> <span class="keyword">static</span> <span class="keyword">inline</span> uint32_t RoundUpNumi32(uint32_t bits) { <span class="keywordflow">return</span> (bits + 31) >> 5; }</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span> </div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span> <span class="keyword">static</span> <span cla
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