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<div class="title">container-util.h</div> </div>
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<a href="container-util_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">// Copyright 2012 Cloudera Inc.</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment">// Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<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>&#160;<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>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<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>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<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>&#160;<span class="comment">// distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<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>&#160;<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>&#160;<span class="comment">// limitations under the License.</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;</div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;</div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="preprocessor">#ifndef IMPALA_UTIL_CONTAINER_UTIL_H</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define IMPALA_UTIL_CONTAINER_UTIL_H</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="preprocessor">#include &lt;map&gt;</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="preprocessor">#include &lt;boost/unordered_map.hpp&gt;</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;</div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="hash-util_8h.html">util/hash-util.h</a>&quot;</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="preprocessor">#include &quot;gen-cpp/Types_types.h&quot;</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;<span class="keyword">namespace </span>impala {</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;</div>
<div class="line"><a name="l00029"></a><span class="lineno"><a class="line" href="namespaceimpala.html#a0bef1e709c7a15bb6356bafd91723436"> 29</a></span>&#160;<span class="keyword">inline</span> std::size_t <a class="code" href="namespaceimpala.html#ac0255e5845537ea9f1d3938ecb19d02c">hash_value</a>(<span class="keyword">const</span> TNetworkAddress&amp; host_port) {</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160; uint32_t <a class="code" href="namespaceimpala.html#a50b59c9628eedf49aa82643ce601967d">hash</a> =</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; <a class="code" href="classimpala_1_1HashUtil.html#a90e4737e5bf94d622cbb2fbdac5c6634">HashUtil::Hash</a>(host_port.hostname.c_str(), host_port.hostname.length(), 0);</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; <span class="keywordflow">return</span> <a class="code" href="classimpala_1_1HashUtil.html#a90e4737e5bf94d622cbb2fbdac5c6634">HashUtil::Hash</a>(&amp;host_port.port, <span class="keyword">sizeof</span>(host_port.port), hash);</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;}</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;</div>
<div class="line"><a name="l00035"></a><span class="lineno"><a class="line" href="structimpala_1_1HashTNetworkAddressPtr.html"> 35</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structimpala_1_1HashTNetworkAddressPtr.html">HashTNetworkAddressPtr</a> : <span class="keyword">public</span> std::unary_function&lt;TNetworkAddress*, size_t&gt; {</div>
<div class="line"><a name="l00036"></a><span class="lineno"><a class="line" href="structimpala_1_1HashTNetworkAddressPtr.html#a69f31bf29ab6b007fb32ff1e28ba98a5"> 36</a></span>&#160; <span class="keywordtype">size_t</span> <a class="code" href="structimpala_1_1HashTNetworkAddressPtr.html#a69f31bf29ab6b007fb32ff1e28ba98a5">operator()</a>(<span class="keyword">const</span> TNetworkAddress* <span class="keyword">const</span>&amp; p)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <a class="code" href="namespaceimpala.html#ac0255e5845537ea9f1d3938ecb19d02c">hash_value</a>(*p); }</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;};</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;</div>
<div class="line"><a name="l00039"></a><span class="lineno"><a class="line" href="structimpala_1_1TNetworkAddressPtrEquals.html"> 39</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structimpala_1_1TNetworkAddressPtrEquals.html">TNetworkAddressPtrEquals</a> : <span class="keyword">public</span> std::unary_function&lt;TNetworkAddress*, bool&gt; {</div>
<div class="line"><a name="l00040"></a><span class="lineno"><a class="line" href="structimpala_1_1TNetworkAddressPtrEquals.html#a3b002db235a9e112e392ef2ddfc8e17c"> 40</a></span>&#160; <span class="keywordtype">bool</span> <a class="code" href="structimpala_1_1TNetworkAddressPtrEquals.html#a3b002db235a9e112e392ef2ddfc8e17c">operator()</a>(<span class="keyword">const</span> TNetworkAddress* <span class="keyword">const</span>&amp; p1,</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <span class="keyword">const</span> TNetworkAddress* <span class="keyword">const</span>&amp; p2)<span class="keyword"> const </span>{</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; <span class="keywordflow">return</span> p1-&gt;hostname == p2-&gt;hostname &amp;&amp; p1-&gt;port == p2-&gt;port;</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; }</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160;};</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160;</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> K, <span class="keyword">typename</span> V&gt;</div>
<div class="line"><a name="l00051"></a><span class="lineno"><a class="line" href="namespaceimpala.html#ac79f8d29c9aaf2dddb617ae5e36ca23f"> 51</a></span>&#160;V* <a class="code" href="namespaceimpala.html#ac79f8d29c9aaf2dddb617ae5e36ca23f">FindOrInsert</a>(std::map&lt;K,V&gt;* m, <span class="keyword">const</span> K&amp; key, <span class="keyword">const</span> V&amp; default_val) {</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; <span class="keyword">typename</span> std::map&lt;K,V&gt;::iterator it = m-&gt;find(key);</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <span class="keywordflow">if</span> (it == m-&gt;end()) {</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; it = m-&gt;insert(std::make_pair(key, default_val)).first;</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; }</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; <span class="keywordflow">return</span> &amp;it-&gt;second;</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160;}</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160;</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> K, <span class="keyword">typename</span> V&gt;</div>
<div class="line"><a name="l00060"></a><span class="lineno"><a class="line" href="namespaceimpala.html#a1b976a4602281202df0183aa7bd08cfe"> 60</a></span>&#160;V* <a class="code" href="namespaceimpala.html#ac79f8d29c9aaf2dddb617ae5e36ca23f">FindOrInsert</a>(boost::unordered_map&lt;K,V&gt;* m, <span class="keyword">const</span> K&amp; key, <span class="keyword">const</span> V&amp; default_val) {</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160; <span class="keyword">typename</span> boost::unordered_map&lt;K,V&gt;::iterator it = m-&gt;find(key);</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; <span class="keywordflow">if</span> (it == m-&gt;end()) {</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160; it = m-&gt;insert(std::make_pair(key, default_val)).first;</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; }</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160; <span class="keywordflow">return</span> &amp;it-&gt;second;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160;}</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160;</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> K, <span class="keyword">typename</span> V&gt;</div>
<div class="line"><a name="l00073"></a><span class="lineno"><a class="line" href="namespaceimpala.html#a7e1679b8a45f92268c31637d033aaaf3"> 73</a></span>&#160;<span class="keyword">const</span> V&amp; <a class="code" href="namespaceimpala.html#a7e1679b8a45f92268c31637d033aaaf3">FindWithDefault</a>(<span class="keyword">const</span> std::map&lt;K, V&gt;&amp; m, <span class="keyword">const</span> K&amp; key, <span class="keyword">const</span> V&amp; default_val) {</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; <span class="keyword">typename</span> std::map&lt;K,V&gt;::const_iterator it = m.find(key);</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; <span class="keywordflow">if</span> (it == m.end()) <span class="keywordflow">return</span> default_val;</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; <span class="keywordflow">return</span> it-&gt;second;</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160;}</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160;</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> K, <span class="keyword">typename</span> V&gt;</div>
<div class="line"><a name="l00080"></a><span class="lineno"><a class="line" href="namespaceimpala.html#a2c366189a1a4b727e33021f31d23bbd4"> 80</a></span>&#160;<span class="keyword">const</span> V&amp; <a class="code" href="namespaceimpala.html#a7e1679b8a45f92268c31637d033aaaf3">FindWithDefault</a>(<span class="keyword">const</span> boost::unordered_map&lt;K, V&gt;&amp; m, <span class="keyword">const</span> K&amp; key,</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160; <span class="keyword">const</span> V&amp; default_val) {</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; <span class="keyword">typename</span> boost::unordered_map&lt;K,V&gt;::const_iterator it = m.find(key);</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160; <span class="keywordflow">if</span> (it == m.end()) <span class="keywordflow">return</span> default_val;</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160; <span class="keywordflow">return</span> it-&gt;second;</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160;}</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160;</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160;<span class="keyword">template</span>&lt;<span class="keyword">typename</span> K, <span class="keyword">typename</span> V&gt;</div>
<div class="line"><a name="l00090"></a><span class="lineno"><a class="line" href="namespaceimpala.html#ab002af2de6b0d3982f4eb66db2afc021"> 90</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="namespaceimpala.html#ab002af2de6b0d3982f4eb66db2afc021">MergeMapValues</a>(<span class="keyword">const</span> std::map&lt;K, V&gt;&amp; src, std::map&lt;K, V&gt;* dst) {</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; <span class="keywordflow">for</span> (<span class="keyword">typename</span> std::map&lt;K, V&gt;::const_iterator src_it = src.begin();</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; src_it != src.end(); ++src_it) {</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; <span class="keyword">typename</span> std::map&lt;K, V&gt;::iterator dst_it = dst-&gt;find(src_it-&gt;first);</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; <span class="keywordflow">if</span> (dst_it == dst-&gt;end()) {</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; (*dst)[src_it-&gt;first] = src_it-&gt;second;</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; dst_it-&gt;second += src_it-&gt;second;</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; }</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; }</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160;}</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160;</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160;}</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160;</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="ttc" id="structimpala_1_1HashTNetworkAddressPtr_html"><div class="ttname"><a href="structimpala_1_1HashTNetworkAddressPtr.html">impala::HashTNetworkAddressPtr</a></div><div class="ttdef"><b>Definition:</b> <a href="container-util_8h_source.html#l00035">container-util.h:35</a></div></div>
<div class="ttc" id="namespaceimpala_html_a50b59c9628eedf49aa82643ce601967d"><div class="ttname"><a href="namespaceimpala.html#a50b59c9628eedf49aa82643ce601967d">impala::hash</a></div><div class="ttdeci">const StringSearch UrlParser::hash_search &amp; hash</div><div class="ttdef"><b>Definition:</b> <a href="url-parser_8cc_source.html#l00041">url-parser.cc:41</a></div></div>
<div class="ttc" id="hash-util_8h_html"><div class="ttname"><a href="hash-util_8h.html">hash-util.h</a></div></div>
<div class="ttc" id="namespaceimpala_html_ac0255e5845537ea9f1d3938ecb19d02c"><div class="ttname"><a href="namespaceimpala.html#ac0255e5845537ea9f1d3938ecb19d02c">impala::hash_value</a></div><div class="ttdeci">std::size_t hash_value(const Decimal4Value &amp;v)</div><div class="ttdoc">This function must be called &#39;hash_value&#39; to be picked up by boost. </div><div class="ttdef"><b>Definition:</b> <a href="decimal-value_8h_source.html#l00397">decimal-value.h:397</a></div></div>
<div class="ttc" id="structimpala_1_1TNetworkAddressPtrEquals_html"><div class="ttname"><a href="structimpala_1_1TNetworkAddressPtrEquals.html">impala::TNetworkAddressPtrEquals</a></div><div class="ttdef"><b>Definition:</b> <a href="container-util_8h_source.html#l00039">container-util.h:39</a></div></div>
<div class="ttc" id="namespaceimpala_html_ac79f8d29c9aaf2dddb617ae5e36ca23f"><div class="ttname"><a href="namespaceimpala.html#ac79f8d29c9aaf2dddb617ae5e36ca23f">impala::FindOrInsert</a></div><div class="ttdeci">V * FindOrInsert(std::map&lt; K, V &gt; *m, const K &amp;key, const V &amp;default_val)</div><div class="ttdef"><b>Definition:</b> <a href="container-util_8h_source.html#l00051">container-util.h:51</a></div></div>
<div class="ttc" id="classimpala_1_1HashUtil_html_a90e4737e5bf94d622cbb2fbdac5c6634"><div class="ttname"><a href="classimpala_1_1HashUtil.html#a90e4737e5bf94d622cbb2fbdac5c6634">impala::HashUtil::Hash</a></div><div class="ttdeci">static uint32_t Hash(const void *data, int32_t bytes, uint32_t seed)</div><div class="ttdef"><b>Definition:</b> <a href="hash-util_8h_source.html#l00135">hash-util.h:135</a></div></div>
<div class="ttc" id="namespaceimpala_html_a7e1679b8a45f92268c31637d033aaaf3"><div class="ttname"><a href="namespaceimpala.html#a7e1679b8a45f92268c31637d033aaaf3">impala::FindWithDefault</a></div><div class="ttdeci">const V &amp; FindWithDefault(const std::map&lt; K, V &gt; &amp;m, const K &amp;key, const V &amp;default_val)</div><div class="ttdef"><b>Definition:</b> <a href="container-util_8h_source.html#l00073">container-util.h:73</a></div></div>
<div class="ttc" id="structimpala_1_1HashTNetworkAddressPtr_html_a69f31bf29ab6b007fb32ff1e28ba98a5"><div class="ttname"><a href="structimpala_1_1HashTNetworkAddressPtr.html#a69f31bf29ab6b007fb32ff1e28ba98a5">impala::HashTNetworkAddressPtr::operator()</a></div><div class="ttdeci">size_t operator()(const TNetworkAddress *const &amp;p) const </div><div class="ttdef"><b>Definition:</b> <a href="container-util_8h_source.html#l00036">container-util.h:36</a></div></div>
<div class="ttc" id="structimpala_1_1TNetworkAddressPtrEquals_html_a3b002db235a9e112e392ef2ddfc8e17c"><div class="ttname"><a href="structimpala_1_1TNetworkAddressPtrEquals.html#a3b002db235a9e112e392ef2ddfc8e17c">impala::TNetworkAddressPtrEquals::operator()</a></div><div class="ttdeci">bool operator()(const TNetworkAddress *const &amp;p1, const TNetworkAddress *const &amp;p2) const </div><div class="ttdef"><b>Definition:</b> <a href="container-util_8h_source.html#l00040">container-util.h:40</a></div></div>
<div class="ttc" id="namespaceimpala_html_ab002af2de6b0d3982f4eb66db2afc021"><div class="ttname"><a href="namespaceimpala.html#ab002af2de6b0d3982f4eb66db2afc021">impala::MergeMapValues</a></div><div class="ttdeci">void MergeMapValues(const std::map&lt; K, V &gt; &amp;src, std::map&lt; K, V &gt; *dst)</div><div class="ttdef"><b>Definition:</b> <a href="container-util_8h_source.html#l00090">container-util.h:90</a></div></div>
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