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| <div class="title">bit-stream-utils.inline.h</div> </div> |
| </div><!--header--> |
| <div class="contents"> |
| <a href="bit-stream-utils_8inline_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">// Copyright 2012 Cloudera Inc.</span></div> |
| <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">//</span></div> |
| <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Licensed under the Apache License, Version 2.0 (the "License");</span></div> |
| <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// you may not use this file except in compliance with the License.</span></div> |
| <div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// You may obtain a copy of the License at</span></div> |
| <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">//</span></div> |
| <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</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">// Unless required by applicable law or agreed to in writing, software</span></div> |
| <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span></div> |
| <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div> |
| <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// See the License for the specific language governing permissions and</span></div> |
| <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">// limitations under the License.</span></div> |
| <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div> |
| <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div> |
| <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#ifndef IMPALA_UTIL_BIT_STREAM_UTILS_INLINE_H</span></div> |
| <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor"></span><span class="preprocessor">#define IMPALA_UTIL_BIT_STREAM_UTILS_INLINE_H</span></div> |
| <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor"></span></div> |
| <div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include "<a class="code" href="bit-stream-utils_8h.html">util/bit-stream-utils.h</a>"</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="keyword">namespace </span>impala {</div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div> |
| <div class="line"><a name="l00023"></a><span class="lineno"><a class="line" href="classimpala_1_1BitWriter.html#ae21363cc6a60255901c4fbfe12401a97"> 23</a></span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="classimpala_1_1BitWriter.html#ae21363cc6a60255901c4fbfe12401a97">BitWriter::PutValue</a>(<a class="code" href="classuint64__t.html">uint64_t</a> v, <span class="keywordtype">int</span> num_bits) {</div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  <span class="comment">// TODO: revisit this limit if necessary (can be raised to 64 by fixing some edge cases)</span></div> |
| <div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  DCHECK_LE(num_bits, 32);</div> |
| <div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  DCHECK_EQ(v >> num_bits, 0) << <span class="stringliteral">"v = "</span> << v << <span class="stringliteral">", num_bits = "</span> << num_bits;</div> |
| <div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div> |
| <div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  <span class="keywordflow">if</span> (<a class="code" href="compiler-util_8h.html#a9acc330d508b9a3b775cfdf7ce405e7d">UNLIKELY</a>(<a class="code" href="classimpala_1_1BitWriter.html#aeb7affb520f003c7fa3d1fb4f162dba2">byte_offset_</a> * 8 + <a class="code" href="classimpala_1_1BitWriter.html#a93c65128df0063d4aebb0b25b1d017e7">bit_offset_</a> + num_bits > <a class="code" href="classimpala_1_1BitWriter.html#a47efe629c10dec6ed931542816da34a1">max_bytes_</a> * 8)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div> |
| <div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <a class="code" href="classimpala_1_1BitWriter.html#a0dbe233b8c5da9e21ca87827eea0288c">buffered_values_</a> |= v << <a class="code" href="classimpala_1_1BitWriter.html#a93c65128df0063d4aebb0b25b1d017e7">bit_offset_</a>;</div> |
| <div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  bit_offset_ += num_bits;</div> |
| <div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div> |
| <div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keywordflow">if</span> (<a class="code" href="compiler-util_8h.html#a9acc330d508b9a3b775cfdf7ce405e7d">UNLIKELY</a>(bit_offset_ >= 64)) {</div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="comment">// Flush buffered_values_ and write out bits of v that did not fit</span></div> |
| <div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  memcpy(<a class="code" href="classimpala_1_1BitWriter.html#ad0d92e5c7e9abd191184b30dfa2cfe9e">buffer_</a> + <a class="code" href="classimpala_1_1BitWriter.html#aeb7affb520f003c7fa3d1fb4f162dba2">byte_offset_</a>, &<a class="code" href="classimpala_1_1BitWriter.html#a0dbe233b8c5da9e21ca87827eea0288c">buffered_values_</a>, 8);</div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <a class="code" href="classimpala_1_1BitWriter.html#a0dbe233b8c5da9e21ca87827eea0288c">buffered_values_</a> = 0;</div> |
| <div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <a class="code" href="classimpala_1_1BitWriter.html#aeb7affb520f003c7fa3d1fb4f162dba2">byte_offset_</a> += 8;</div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  bit_offset_ -= 64;</div> |
| <div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <a class="code" href="classimpala_1_1BitWriter.html#a0dbe233b8c5da9e21ca87827eea0288c">buffered_values_</a> = v >> (num_bits - <a class="code" href="classimpala_1_1BitWriter.html#a93c65128df0063d4aebb0b25b1d017e7">bit_offset_</a>);</div> |
| <div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  }</div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  DCHECK_LT(bit_offset_, 64);</div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</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"><a class="line" href="classimpala_1_1BitWriter.html#ad13d095b59cc0a7a3653c01dbb2640b6"> 45</a></span> <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="classimpala_1_1BitWriter.html#ad13d095b59cc0a7a3653c01dbb2640b6">BitWriter::Flush</a>(<span class="keywordtype">bool</span> align) {</div> |
| <div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordtype">int</span> num_bytes = <a class="code" href="classimpala_1_1BitUtil.html#a372c4cce3b2fd79c710ec36d01afda07">BitUtil::Ceil</a>(<a class="code" href="classimpala_1_1BitWriter.html#a93c65128df0063d4aebb0b25b1d017e7">bit_offset_</a>, 8);</div> |
| <div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  DCHECK_LE(<a class="code" href="classimpala_1_1BitWriter.html#aeb7affb520f003c7fa3d1fb4f162dba2">byte_offset_</a> + num_bytes, <a class="code" href="classimpala_1_1BitWriter.html#a47efe629c10dec6ed931542816da34a1">max_bytes_</a>);</div> |
| <div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  memcpy(<a class="code" href="classimpala_1_1BitWriter.html#ad0d92e5c7e9abd191184b30dfa2cfe9e">buffer_</a> + <a class="code" href="classimpala_1_1BitWriter.html#aeb7affb520f003c7fa3d1fb4f162dba2">byte_offset_</a>, &<a class="code" href="classimpala_1_1BitWriter.html#a0dbe233b8c5da9e21ca87827eea0288c">buffered_values_</a>, num_bytes);</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="keywordflow">if</span> (align) {</div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <a class="code" href="classimpala_1_1BitWriter.html#a0dbe233b8c5da9e21ca87827eea0288c">buffered_values_</a> = 0;</div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <a class="code" href="classimpala_1_1BitWriter.html#aeb7affb520f003c7fa3d1fb4f162dba2">byte_offset_</a> += num_bytes;</div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <a class="code" href="classimpala_1_1BitWriter.html#a93c65128df0063d4aebb0b25b1d017e7">bit_offset_</a> = 0;</div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  }</div> |
| <div class="line"><a name="l00055"></a><span class="lineno"> 55</span> }</div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div> |
| <div class="line"><a name="l00057"></a><span class="lineno"><a class="line" href="classimpala_1_1BitWriter.html#ac2497dce674f6dfdc6b29049ccfb2d43"> 57</a></span> <span class="keyword">inline</span> uint8_t* <a class="code" href="classimpala_1_1BitWriter.html#ac2497dce674f6dfdc6b29049ccfb2d43">BitWriter::GetNextBytePtr</a>(<span class="keywordtype">int</span> num_bytes) {</div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <a class="code" href="classimpala_1_1BitWriter.html#ad13d095b59cc0a7a3653c01dbb2640b6">Flush</a>(<span class="comment">/* align */</span> <span class="keyword">true</span>);</div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  DCHECK_LE(<a class="code" href="classimpala_1_1BitWriter.html#aeb7affb520f003c7fa3d1fb4f162dba2">byte_offset_</a>, <a class="code" href="classimpala_1_1BitWriter.html#a47efe629c10dec6ed931542816da34a1">max_bytes_</a>);</div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keywordflow">if</span> (<a class="code" href="classimpala_1_1BitWriter.html#aeb7affb520f003c7fa3d1fb4f162dba2">byte_offset_</a> + num_bytes > <a class="code" href="classimpala_1_1BitWriter.html#a47efe629c10dec6ed931542816da34a1">max_bytes_</a>) <span class="keywordflow">return</span> NULL;</div> |
| <div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  uint8_t* ptr = <a class="code" href="classimpala_1_1BitWriter.html#ad0d92e5c7e9abd191184b30dfa2cfe9e">buffer_</a> + <a class="code" href="classimpala_1_1BitWriter.html#aeb7affb520f003c7fa3d1fb4f162dba2">byte_offset_</a>;</div> |
| <div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  byte_offset_ += num_bytes;</div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">return</span> ptr;</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> </div> |
| <div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="keyword">template</span><<span class="keyword">typename</span> T></div> |
| <div class="line"><a name="l00067"></a><span class="lineno"><a class="line" href="classimpala_1_1BitWriter.html#a9306b1719419818d0b97201bb01795f4"> 67</a></span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="classimpala_1_1BitWriter.html#a9306b1719419818d0b97201bb01795f4">BitWriter::PutAligned</a>(T val, <span class="keywordtype">int</span> num_bytes) {</div> |
| <div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  uint8_t* ptr = <a class="code" href="classimpala_1_1BitWriter.html#ac2497dce674f6dfdc6b29049ccfb2d43">GetNextBytePtr</a>(num_bytes);</div> |
| <div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordflow">if</span> (ptr == NULL) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  memcpy(ptr, &val, num_bytes);</div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00072"></a><span class="lineno"> 72</span> }</div> |
| <div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div> |
| <div class="line"><a name="l00074"></a><span class="lineno"><a class="line" href="classimpala_1_1BitWriter.html#a002cb318632b647a3ff75ebfb224e3e2"> 74</a></span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="classimpala_1_1BitWriter.html#a002cb318632b647a3ff75ebfb224e3e2">BitWriter::PutVlqInt</a>(int32_t v) {</div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordtype">bool</span> result = <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordflow">while</span> ((v & 0xFFFFFF80) != 0L) {</div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  result &= PutAligned<uint8_t>((v & 0x7F) | 0x80, 1);</div> |
| <div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  v >>= 7;</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>  result &= PutAligned<uint8_t>(v & 0x7F, 1);</div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">return</span> result;</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><<span class="keyword">typename</span> T></div> |
| <div class="line"><a name="l00085"></a><span class="lineno"><a class="line" href="classimpala_1_1BitReader.html#a6fb11125149229ec58ec2340d7d457c8"> 85</a></span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="classimpala_1_1BitReader.html#a6fb11125149229ec58ec2340d7d457c8">BitReader::GetValue</a>(<span class="keywordtype">int</span> num_bits, T* v) {</div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="comment">// TODO: revisit this limit if necessary</span></div> |
| <div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  DCHECK_LE(num_bits, 32);</div> |
| <div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  DCHECK_LE(num_bits, <span class="keyword">sizeof</span>(T) * 8);</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="keywordflow">if</span> (<a class="code" href="compiler-util_8h.html#a9acc330d508b9a3b775cfdf7ce405e7d">UNLIKELY</a>(<a class="code" href="classimpala_1_1BitReader.html#adbbdde5af8a3b7cfcf5a2702a76991fb">byte_offset_</a> * 8 + <a class="code" href="classimpala_1_1BitReader.html#a05d2b0ee77ea6c0392c76eb8ae123675">bit_offset_</a> + num_bits > <a class="code" href="classimpala_1_1BitReader.html#a965f5d9efef99161a8e469181df08d94">max_bytes_</a> * 8)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span> </div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  *v = <a class="code" href="classimpala_1_1BitUtil.html#a4808e9b65d748f9a93661abafe5792ed">BitUtil::TrailingBits</a>(<a class="code" href="classimpala_1_1BitReader.html#a40fea8e87a810983ada5a96a17bf8565">buffered_values_</a>, <a class="code" href="classimpala_1_1BitReader.html#a05d2b0ee77ea6c0392c76eb8ae123675">bit_offset_</a> + num_bits) >> <a class="code" href="classimpala_1_1BitReader.html#a05d2b0ee77ea6c0392c76eb8ae123675">bit_offset_</a>;</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>  <a class="code" href="classimpala_1_1BitReader.html#a05d2b0ee77ea6c0392c76eb8ae123675">bit_offset_</a> += num_bits;</div> |
| <div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordflow">if</span> (<a class="code" href="classimpala_1_1BitReader.html#a05d2b0ee77ea6c0392c76eb8ae123675">bit_offset_</a> >= 64) {</div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <a class="code" href="classimpala_1_1BitReader.html#adbbdde5af8a3b7cfcf5a2702a76991fb">byte_offset_</a> += 8;</div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <a class="code" href="classimpala_1_1BitReader.html#a05d2b0ee77ea6c0392c76eb8ae123675">bit_offset_</a> -= 64;</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>  <span class="keywordtype">int</span> bytes_remaining = <a class="code" href="classimpala_1_1BitReader.html#a965f5d9efef99161a8e469181df08d94">max_bytes_</a> - <a class="code" href="classimpala_1_1BitReader.html#adbbdde5af8a3b7cfcf5a2702a76991fb">byte_offset_</a>;</div> |
| <div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordflow">if</span> (<a class="code" href="compiler-util_8h.html#a262afcfe437f4addb13fb1b47a6a7086">LIKELY</a>(bytes_remaining >= 8)) {</div> |
| <div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  memcpy(&<a class="code" href="classimpala_1_1BitReader.html#a40fea8e87a810983ada5a96a17bf8565">buffered_values_</a>, <a class="code" href="classimpala_1_1BitReader.html#a5b5e257e5ed6b3ae6164bcf7414f1793">buffer_</a> + byte_offset_, 8);</div> |
| <div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  } <span class="keywordflow">else</span> {</div> |
| <div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  memcpy(&<a class="code" href="classimpala_1_1BitReader.html#a40fea8e87a810983ada5a96a17bf8565">buffered_values_</a>, <a class="code" href="classimpala_1_1BitReader.html#a5b5e257e5ed6b3ae6164bcf7414f1793">buffer_</a> + byte_offset_, bytes_remaining);</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> </div> |
| <div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="comment">// Read bits of v that crossed into new buffered_values_</span></div> |
| <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  *v |= <a class="code" href="classimpala_1_1BitUtil.html#a4808e9b65d748f9a93661abafe5792ed">BitUtil::TrailingBits</a>(<a class="code" href="classimpala_1_1BitReader.html#a40fea8e87a810983ada5a96a17bf8565">buffered_values_</a>, <a class="code" href="classimpala_1_1BitReader.html#a05d2b0ee77ea6c0392c76eb8ae123675">bit_offset_</a>)</div> |
| <div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  << (num_bits - <a class="code" href="classimpala_1_1BitReader.html#a05d2b0ee77ea6c0392c76eb8ae123675">bit_offset_</a>);</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>  DCHECK_LE(<a class="code" href="classimpala_1_1BitReader.html#a05d2b0ee77ea6c0392c76eb8ae123675">bit_offset_</a>, 64);</div> |
| <div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00112"></a><span class="lineno"> 112</span> }</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">template</span><<span class="keyword">typename</span> T></div> |
| <div class="line"><a name="l00115"></a><span class="lineno"><a class="line" href="classimpala_1_1BitReader.html#a868c7d0fb2b466b6bc6ed357e4137635"> 115</a></span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="classimpala_1_1BitReader.html#a868c7d0fb2b466b6bc6ed357e4137635">BitReader::GetAligned</a>(<span class="keywordtype">int</span> num_bytes, T* v) {</div> |
| <div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  DCHECK_LE(num_bytes, <span class="keyword">sizeof</span>(T));</div> |
| <div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="keywordtype">int</span> bytes_read = <a class="code" href="classimpala_1_1BitUtil.html#a372c4cce3b2fd79c710ec36d01afda07">BitUtil::Ceil</a>(<a class="code" href="classimpala_1_1BitReader.html#a05d2b0ee77ea6c0392c76eb8ae123675">bit_offset_</a>, 8);</div> |
| <div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordflow">if</span> (<a class="code" href="compiler-util_8h.html#a9acc330d508b9a3b775cfdf7ce405e7d">UNLIKELY</a>(<a class="code" href="classimpala_1_1BitReader.html#adbbdde5af8a3b7cfcf5a2702a76991fb">byte_offset_</a> + bytes_read + num_bytes > <a class="code" href="classimpala_1_1BitReader.html#a965f5d9efef99161a8e469181df08d94">max_bytes_</a>)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00119"></a><span class="lineno"> 119</span> </div> |
| <div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="comment">// Advance byte_offset to next unread byte and read num_bytes</span></div> |
| <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <a class="code" href="classimpala_1_1BitReader.html#adbbdde5af8a3b7cfcf5a2702a76991fb">byte_offset_</a> += bytes_read;</div> |
| <div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  memcpy(v, <a class="code" href="classimpala_1_1BitReader.html#a5b5e257e5ed6b3ae6164bcf7414f1793">buffer_</a> + <a class="code" href="classimpala_1_1BitReader.html#adbbdde5af8a3b7cfcf5a2702a76991fb">byte_offset_</a>, num_bytes);</div> |
| <div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <a class="code" href="classimpala_1_1BitReader.html#adbbdde5af8a3b7cfcf5a2702a76991fb">byte_offset_</a> += num_bytes;</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>  <span class="comment">// Reset buffered_values_</span></div> |
| <div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <a class="code" href="classimpala_1_1BitReader.html#a05d2b0ee77ea6c0392c76eb8ae123675">bit_offset_</a> = 0;</div> |
| <div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="keywordtype">int</span> bytes_remaining = <a class="code" href="classimpala_1_1BitReader.html#a965f5d9efef99161a8e469181df08d94">max_bytes_</a> - <a class="code" href="classimpala_1_1BitReader.html#adbbdde5af8a3b7cfcf5a2702a76991fb">byte_offset_</a>;</div> |
| <div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keywordflow">if</span> (<a class="code" href="compiler-util_8h.html#a262afcfe437f4addb13fb1b47a6a7086">LIKELY</a>(bytes_remaining >= 8)) {</div> |
| <div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  memcpy(&<a class="code" href="classimpala_1_1BitReader.html#a40fea8e87a810983ada5a96a17bf8565">buffered_values_</a>, <a class="code" href="classimpala_1_1BitReader.html#a5b5e257e5ed6b3ae6164bcf7414f1793">buffer_</a> + byte_offset_, 8);</div> |
| <div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  } <span class="keywordflow">else</span> {</div> |
| <div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  memcpy(&<a class="code" href="classimpala_1_1BitReader.html#a40fea8e87a810983ada5a96a17bf8565">buffered_values_</a>, <a class="code" href="classimpala_1_1BitReader.html#a5b5e257e5ed6b3ae6164bcf7414f1793">buffer_</a> + byte_offset_, bytes_remaining);</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>  <span class="keywordflow">return</span> <span class="keyword">true</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> </div> |
| <div class="line"><a name="l00136"></a><span class="lineno"><a class="line" href="classimpala_1_1BitReader.html#a9b43f9b49478ce5b78adea9e651ba170"> 136</a></span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="classimpala_1_1BitReader.html#a9b43f9b49478ce5b78adea9e651ba170">BitReader::GetVlqInt</a>(int32_t* v) {</div> |
| <div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  *v = 0;</div> |
| <div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordtype">int</span> shift = 0;</div> |
| <div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordtype">int</span> num_bytes = 0;</div> |
| <div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  uint8_t byte = 0;</div> |
| <div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">do</span> {</div> |
| <div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="keywordflow">if</span> (!GetAligned<uint8_t>(1, &byte)) <span class="keywordflow">return</span> <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  *v |= (byte & 0x7F) << shift;</div> |
| <div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  shift += 7;</div> |
| <div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  DCHECK_LE(++num_bytes, <a class="code" href="classimpala_1_1BitReader.html#a82d53654593c787d056b6186f50a941b">MAX_VLQ_BYTE_LEN</a>);</div> |
| <div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  } <span class="keywordflow">while</span> ((byte & 0x80) != 0);</div> |
| <div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00148"></a><span class="lineno"> 148</span> }</div> |
| <div class="line"><a name="l00149"></a><span class="lineno"> 149</span> </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> </div> |
| <div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="preprocessor">#endif</span></div> |
| <div class="ttc" id="classimpala_1_1BitReader_html_a868c7d0fb2b466b6bc6ed357e4137635"><div class="ttname"><a href="classimpala_1_1BitReader.html#a868c7d0fb2b466b6bc6ed357e4137635">impala::BitReader::GetAligned</a></div><div class="ttdeci">bool GetAligned(int num_bytes, T *v)</div><div class="ttdef"><b>Definition:</b> <a href="bit-stream-utils_8inline_8h_source.html#l00115">bit-stream-utils.inline.h:115</a></div></div> |
| <div class="ttc" id="classimpala_1_1BitWriter_html_ae21363cc6a60255901c4fbfe12401a97"><div class="ttname"><a href="classimpala_1_1BitWriter.html#ae21363cc6a60255901c4fbfe12401a97">impala::BitWriter::PutValue</a></div><div class="ttdeci">bool PutValue(uint64_t v, int num_bits)</div><div class="ttdef"><b>Definition:</b> <a href="bit-stream-utils_8inline_8h_source.html#l00023">bit-stream-utils.inline.h:23</a></div></div> |
| <div class="ttc" id="bit-stream-utils_8h_html"><div class="ttname"><a href="bit-stream-utils_8h.html">bit-stream-utils.h</a></div></div> |
| <div class="ttc" id="classimpala_1_1BitReader_html_a5b5e257e5ed6b3ae6164bcf7414f1793"><div class="ttname"><a href="classimpala_1_1BitReader.html#a5b5e257e5ed6b3ae6164bcf7414f1793">impala::BitReader::buffer_</a></div><div class="ttdeci">uint8_t * buffer_</div><div class="ttdef"><b>Definition:</b> <a href="bit-stream-utils_8h_source.html#l00130">bit-stream-utils.h:130</a></div></div> |
| <div class="ttc" id="classimpala_1_1BitWriter_html_ad0d92e5c7e9abd191184b30dfa2cfe9e"><div class="ttname"><a href="classimpala_1_1BitWriter.html#ad0d92e5c7e9abd191184b30dfa2cfe9e">impala::BitWriter::buffer_</a></div><div class="ttdeci">uint8_t * buffer_</div><div class="ttdef"><b>Definition:</b> <a href="bit-stream-utils_8h_source.html#l00078">bit-stream-utils.h:78</a></div></div> |
| <div class="ttc" id="classimpala_1_1BitWriter_html_aeb7affb520f003c7fa3d1fb4f162dba2"><div class="ttname"><a href="classimpala_1_1BitWriter.html#aeb7affb520f003c7fa3d1fb4f162dba2">impala::BitWriter::byte_offset_</a></div><div class="ttdeci">int byte_offset_</div><div class="ttdef"><b>Definition:</b> <a href="bit-stream-utils_8h_source.html#l00085">bit-stream-utils.h:85</a></div></div> |
| <div class="ttc" id="classimpala_1_1BitReader_html_adbbdde5af8a3b7cfcf5a2702a76991fb"><div class="ttname"><a href="classimpala_1_1BitReader.html#adbbdde5af8a3b7cfcf5a2702a76991fb">impala::BitReader::byte_offset_</a></div><div class="ttdeci">int byte_offset_</div><div class="ttdef"><b>Definition:</b> <a href="bit-stream-utils_8h_source.html#l00137">bit-stream-utils.h:137</a></div></div> |
| <div class="ttc" id="classimpala_1_1BitReader_html_a40fea8e87a810983ada5a96a17bf8565"><div class="ttname"><a href="classimpala_1_1BitReader.html#a40fea8e87a810983ada5a96a17bf8565">impala::BitReader::buffered_values_</a></div><div class="ttdeci">uint64_t buffered_values_</div><div class="ttdef"><b>Definition:</b> <a href="bit-stream-utils_8h_source.html#l00135">bit-stream-utils.h:135</a></div></div> |
| <div class="ttc" id="classimpala_1_1BitWriter_html_a0dbe233b8c5da9e21ca87827eea0288c"><div class="ttname"><a href="classimpala_1_1BitWriter.html#a0dbe233b8c5da9e21ca87827eea0288c">impala::BitWriter::buffered_values_</a></div><div class="ttdeci">uint64_t buffered_values_</div><div class="ttdef"><b>Definition:</b> <a href="bit-stream-utils_8h_source.html#l00083">bit-stream-utils.h:83</a></div></div> |
| <div class="ttc" id="classimpala_1_1BitWriter_html_a47efe629c10dec6ed931542816da34a1"><div class="ttname"><a href="classimpala_1_1BitWriter.html#a47efe629c10dec6ed931542816da34a1">impala::BitWriter::max_bytes_</a></div><div class="ttdeci">int max_bytes_</div><div class="ttdef"><b>Definition:</b> <a href="bit-stream-utils_8h_source.html#l00079">bit-stream-utils.h:79</a></div></div> |
| <div class="ttc" id="classimpala_1_1BitWriter_html_ac2497dce674f6dfdc6b29049ccfb2d43"><div class="ttname"><a href="classimpala_1_1BitWriter.html#ac2497dce674f6dfdc6b29049ccfb2d43">impala::BitWriter::GetNextBytePtr</a></div><div class="ttdeci">uint8_t * GetNextBytePtr(int num_bytes=1)</div><div class="ttdef"><b>Definition:</b> <a href="bit-stream-utils_8inline_8h_source.html#l00057">bit-stream-utils.inline.h:57</a></div></div> |
| <div class="ttc" id="classimpala_1_1BitWriter_html_a9306b1719419818d0b97201bb01795f4"><div class="ttname"><a href="classimpala_1_1BitWriter.html#a9306b1719419818d0b97201bb01795f4">impala::BitWriter::PutAligned</a></div><div class="ttdeci">bool PutAligned(T v, int num_bytes)</div><div class="ttdef"><b>Definition:</b> <a href="bit-stream-utils_8inline_8h_source.html#l00067">bit-stream-utils.inline.h:67</a></div></div> |
| <div class="ttc" id="classimpala_1_1BitWriter_html_a93c65128df0063d4aebb0b25b1d017e7"><div class="ttname"><a href="classimpala_1_1BitWriter.html#a93c65128df0063d4aebb0b25b1d017e7">impala::BitWriter::bit_offset_</a></div><div class="ttdeci">int bit_offset_</div><div class="ttdef"><b>Definition:</b> <a href="bit-stream-utils_8h_source.html#l00086">bit-stream-utils.h:86</a></div></div> |
| <div class="ttc" id="classimpala_1_1BitUtil_html_a4808e9b65d748f9a93661abafe5792ed"><div class="ttname"><a href="classimpala_1_1BitUtil.html#a4808e9b65d748f9a93661abafe5792ed">impala::BitUtil::TrailingBits</a></div><div class="ttdeci">static uint64_t TrailingBits(uint64_t v, int num_bits)</div><div class="ttdoc">Returns the 'num_bits' least-significant bits of 'v'. </div><div class="ttdef"><b>Definition:</b> <a href="bit-util_8h_source.html#l00125">bit-util.h:125</a></div></div> |
| <div class="ttc" id="classuint64__t_html"><div class="ttname"><a href="classuint64__t.html">uint64_t</a></div></div> |
| <div class="ttc" id="classimpala_1_1BitReader_html_a9b43f9b49478ce5b78adea9e651ba170"><div class="ttname"><a href="classimpala_1_1BitReader.html#a9b43f9b49478ce5b78adea9e651ba170">impala::BitReader::GetVlqInt</a></div><div class="ttdeci">bool GetVlqInt(int32_t *v)</div><div class="ttdef"><b>Definition:</b> <a href="bit-stream-utils_8inline_8h_source.html#l00136">bit-stream-utils.inline.h:136</a></div></div> |
| <div class="ttc" id="classimpala_1_1BitWriter_html_ad13d095b59cc0a7a3653c01dbb2640b6"><div class="ttname"><a href="classimpala_1_1BitWriter.html#ad13d095b59cc0a7a3653c01dbb2640b6">impala::BitWriter::Flush</a></div><div class="ttdeci">void Flush(bool align=false)</div><div class="ttdef"><b>Definition:</b> <a href="bit-stream-utils_8inline_8h_source.html#l00045">bit-stream-utils.inline.h:45</a></div></div> |
| <div class="ttc" id="classimpala_1_1BitUtil_html_a372c4cce3b2fd79c710ec36d01afda07"><div class="ttname"><a href="classimpala_1_1BitUtil.html#a372c4cce3b2fd79c710ec36d01afda07">impala::BitUtil::Ceil</a></div><div class="ttdeci">static int Ceil(int value, int divisor)</div><div class="ttdoc">Returns the ceil of value/divisor. </div><div class="ttdef"><b>Definition:</b> <a href="bit-util_8h_source.html#l00032">bit-util.h:32</a></div></div> |
| <div class="ttc" id="classimpala_1_1BitWriter_html_a002cb318632b647a3ff75ebfb224e3e2"><div class="ttname"><a href="classimpala_1_1BitWriter.html#a002cb318632b647a3ff75ebfb224e3e2">impala::BitWriter::PutVlqInt</a></div><div class="ttdeci">bool PutVlqInt(int32_t v)</div><div class="ttdef"><b>Definition:</b> <a href="bit-stream-utils_8inline_8h_source.html#l00074">bit-stream-utils.inline.h:74</a></div></div> |
| <div class="ttc" id="compiler-util_8h_html_a9acc330d508b9a3b775cfdf7ce405e7d"><div class="ttname"><a href="compiler-util_8h.html#a9acc330d508b9a3b775cfdf7ce405e7d">UNLIKELY</a></div><div class="ttdeci">#define UNLIKELY(expr)</div><div class="ttdef"><b>Definition:</b> <a href="compiler-util_8h_source.html#l00033">compiler-util.h:33</a></div></div> |
| <div class="ttc" id="classimpala_1_1BitReader_html_a05d2b0ee77ea6c0392c76eb8ae123675"><div class="ttname"><a href="classimpala_1_1BitReader.html#a05d2b0ee77ea6c0392c76eb8ae123675">impala::BitReader::bit_offset_</a></div><div class="ttdeci">int bit_offset_</div><div class="ttdef"><b>Definition:</b> <a href="bit-stream-utils_8h_source.html#l00138">bit-stream-utils.h:138</a></div></div> |
| <div class="ttc" id="compiler-util_8h_html_a262afcfe437f4addb13fb1b47a6a7086"><div class="ttname"><a href="compiler-util_8h.html#a262afcfe437f4addb13fb1b47a6a7086">LIKELY</a></div><div class="ttdeci">#define LIKELY(expr)</div><div class="ttdef"><b>Definition:</b> <a href="compiler-util_8h_source.html#l00032">compiler-util.h:32</a></div></div> |
| <div class="ttc" id="classimpala_1_1BitReader_html_a965f5d9efef99161a8e469181df08d94"><div class="ttname"><a href="classimpala_1_1BitReader.html#a965f5d9efef99161a8e469181df08d94">impala::BitReader::max_bytes_</a></div><div class="ttdeci">int max_bytes_</div><div class="ttdef"><b>Definition:</b> <a href="bit-stream-utils_8h_source.html#l00131">bit-stream-utils.h:131</a></div></div> |
| <div class="ttc" id="classimpala_1_1BitReader_html_a82d53654593c787d056b6186f50a941b"><div class="ttname"><a href="classimpala_1_1BitReader.html#a82d53654593c787d056b6186f50a941b">impala::BitReader::MAX_VLQ_BYTE_LEN</a></div><div class="ttdeci">static const int MAX_VLQ_BYTE_LEN</div><div class="ttdoc">Maximum byte length of a vlq encoded int. </div><div class="ttdef"><b>Definition:</b> <a href="bit-stream-utils_8h_source.html#l00127">bit-stream-utils.h:127</a></div></div> |
| <div class="ttc" id="classimpala_1_1BitReader_html_a6fb11125149229ec58ec2340d7d457c8"><div class="ttname"><a href="classimpala_1_1BitReader.html#a6fb11125149229ec58ec2340d7d457c8">impala::BitReader::GetValue</a></div><div class="ttdeci">bool GetValue(int num_bits, T *v)</div><div class="ttdef"><b>Definition:</b> <a href="bit-stream-utils_8inline_8h_source.html#l00085">bit-stream-utils.inline.h:85</a></div></div> |
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