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<div class="title">decimal-util.cc</div> </div>
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<a href="decimal-util_8cc.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;<span class="preprocessor">#include &quot;<a class="code" href="decimal-util_8h.html">util/decimal-util.h</a>&quot;</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="types_8h.html">runtime/types.h</a>&quot;</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="keyword">namespace </span>impala {</div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<a class="code" href="namespaceimpala.html#a537700995e6d739a40c327c0354e6869">int128_t</a> <a class="code" href="classimpala_1_1DecimalUtil.html#aeabfb39e7ddbe3d629c662411ddfdff6">DecimalUtil::MAX_UNSCALED_DECIMAL</a>;</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"><a class="line" href="classimpala_1_1DecimalUtil.html#ad543a69d1d8d3d23958fa399b356181e"> 22</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="classimpala_1_1DecimalUtil.html#ad543a69d1d8d3d23958fa399b356181e">DecimalUtil::InitMaxUnscaledDecimal</a>() {</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160; <span class="comment">// TODO: is there a better way to do this?</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160; <a class="code" href="classimpala_1_1DecimalUtil.html#aeabfb39e7ddbe3d629c662411ddfdff6">MAX_UNSCALED_DECIMAL</a> = 0;</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160; <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; <a class="code" href="structimpala_1_1ColumnType.html#a46726622466a0a12d52094e47904ae51">ColumnType::MAX_PRECISION</a>; ++i) {</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160; <a class="code" href="classimpala_1_1DecimalUtil.html#aeabfb39e7ddbe3d629c662411ddfdff6">MAX_UNSCALED_DECIMAL</a> *= 10;</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160; <a class="code" href="classimpala_1_1DecimalUtil.html#aeabfb39e7ddbe3d629c662411ddfdff6">MAX_UNSCALED_DECIMAL</a> += 9;</div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160; }</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;}</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;}</div>
<div class="ttc" id="types_8h_html"><div class="ttname"><a href="types_8h.html">types.h</a></div></div>
<div class="ttc" id="decimal-util_8h_html"><div class="ttname"><a href="decimal-util_8h.html">decimal-util.h</a></div></div>
<div class="ttc" id="classimpala_1_1DecimalUtil_html_aeabfb39e7ddbe3d629c662411ddfdff6"><div class="ttname"><a href="classimpala_1_1DecimalUtil.html#aeabfb39e7ddbe3d629c662411ddfdff6">impala::DecimalUtil::MAX_UNSCALED_DECIMAL</a></div><div class="ttdeci">static int128_t MAX_UNSCALED_DECIMAL</div><div class="ttdoc">Maximum absolute value of int128_t that we use. This is 38 digits of 9&#39;s. </div><div class="ttdef"><b>Definition:</b> <a href="decimal-util_8h_source.html#l00032">decimal-util.h:32</a></div></div>
<div class="ttc" id="classimpala_1_1DecimalUtil_html_ad543a69d1d8d3d23958fa399b356181e"><div class="ttname"><a href="classimpala_1_1DecimalUtil.html#ad543a69d1d8d3d23958fa399b356181e">impala::DecimalUtil::InitMaxUnscaledDecimal</a></div><div class="ttdeci">static void InitMaxUnscaledDecimal()</div><div class="ttdoc">Initializes MAX_UNSCALED_DECIMAL. Must be called once before using it. </div><div class="ttdef"><b>Definition:</b> <a href="decimal-util_8cc_source.html#l00022">decimal-util.cc:22</a></div></div>
<div class="ttc" id="structimpala_1_1ColumnType_html_a46726622466a0a12d52094e47904ae51"><div class="ttname"><a href="structimpala_1_1ColumnType.html#a46726622466a0a12d52094e47904ae51">impala::ColumnType::MAX_PRECISION</a></div><div class="ttdeci">static const int MAX_PRECISION</div><div class="ttdoc">Must be kept in sync with FE&#39;s max precision/scale. </div><div class="ttdef"><b>Definition:</b> <a href="types_8h_source.html#l00071">types.h:71</a></div></div>
<div class="ttc" id="namespaceimpala_html_a537700995e6d739a40c327c0354e6869"><div class="ttname"><a href="namespaceimpala.html#a537700995e6d739a40c327c0354e6869">impala::int128_t</a></div><div class="ttdeci">__int128_t int128_t</div><div class="ttdoc">We use the c++ int128_t type. This is stored using 16 bytes and very performant. </div><div class="ttdef"><b>Definition:</b> <a href="multi-precision_8h_source.html#l00051">multi-precision.h:51</a></div></div>
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