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<div class="title">write-stream.h</div> </div>
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<a href="write-stream_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_EXEC_WRITE_STREAM_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_EXEC_WRITE_STREAM_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;boost/cstdint.hpp&gt;</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="status_8h.html">common/status.h</a>&quot;</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="keyword">namespace </span>impala {</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;</div>
<div class="line"><a name="l00029"></a><span class="lineno"><a class="line" href="classimpala_1_1WriteStream.html"> 29</a></span>&#160;<span class="keyword">class </span><a class="code" href="classimpala_1_1WriteStream.html">WriteStream</a> {</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160; <span class="keyword">public</span>:</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;</div>
<div class="line"><a name="l00032"></a><span class="lineno"><a class="line" href="classimpala_1_1WriteStream.html#a92d0858e71b8131cf6a34f42633ddb72"> 32</a></span>&#160; <a class="code" href="classimpala_1_1WriteStream.html#a92d0858e71b8131cf6a34f42633ddb72">WriteStream</a>() : <a class="code" href="classimpala_1_1WriteStream.html#ab066287773692c35fb6e8258f27566e8">len_</a>(0) { };</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="classimpala_1_1WriteStream.html#adc516247232bdae74704348d3393487e">WriteBytes</a>(<span class="keywordtype">int</span> length, <span class="keyword">const</span> uint8_t* buf);</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="classimpala_1_1WriteStream.html#adc516247232bdae74704348d3393487e">WriteBytes</a>(<span class="keywordtype">int</span> length, <span class="keyword">const</span> <span class="keywordtype">char</span>* buf);</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; <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="classimpala_1_1WriteStream.html#a7650fe1ac6822124ebab161e0db64aeb">WriteVInt</a>(int32_t val);</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160; <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="classimpala_1_1WriteStream.html#a8227b06023b9a25d5b1f82d22eaac1e0">WriteInt</a>(uint32_t val);</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="classimpala_1_1WriteStream.html#ac371a007920f431e8af46aedd1f5ef03">WriteByte</a>(uint8_t val);</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="classimpala_1_1WriteStream.html#ac371a007920f431e8af46aedd1f5ef03">WriteByte</a>(<span class="keywordtype">char</span> val);</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160; <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="classimpala_1_1WriteStream.html#aa501cd531486341419537ac69360fd4f">WriteVLong</a>(int64_t val);</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="classimpala_1_1WriteStream.html#a06543cfd2fc74e1a2f4f85ebda30e3e3">WriteBoolean</a>(<span class="keywordtype">bool</span> val);</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="classimpala_1_1WriteStream.html#abe566e3233c8bab1d85c7ac3ff6e6683">WriteZInt</a>(int32_t val);</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="classimpala_1_1WriteStream.html#a162ac6ac531690856191ca3d31c32d10">WriteZLong</a>(int64_t val);</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="classimpala_1_1WriteStream.html#a55a2561036c7f1d6c46a6284b3325a41">WriteText</a>(int32_t len, <span class="keyword">const</span> uint8_t* buf);</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="classimpala_1_1WriteStream.html#a4177e5bfa7a1df892caedcbbb35e08f7">WriteEmptyText</a>();</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160;</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; <span class="keyword">inline</span> <span class="keywordtype">void</span> <a class="code" href="classimpala_1_1WriteStream.html#ac78cea54a3b6110df12adf292c5dc2fd">Clear</a>();</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; <span class="keyword">inline</span> <span class="keywordtype">size_t</span> <a class="code" href="classimpala_1_1WriteStream.html#a5d9b77c3ad5615727afac94ae2172e5a">Size</a>();</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160;</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; <span class="keyword">inline</span> std::string <a class="code" href="classimpala_1_1WriteStream.html#ac2e75a1c018da965587f2e88a22d5509">String</a>();</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; <span class="keyword">private</span>:</div>
<div class="line"><a name="l00060"></a><span class="lineno"><a class="line" href="classimpala_1_1WriteStream.html#a127eebe497919377d4e31251ffea2aff"> 60</a></span>&#160; std::stringstream <a class="code" href="classimpala_1_1WriteStream.html#a127eebe497919377d4e31251ffea2aff">buffer_</a>;</div>
<div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="classimpala_1_1WriteStream.html#ab066287773692c35fb6e8258f27566e8"> 61</a></span>&#160; <a class="code" href="classuint64__t.html">uint64_t</a> <a class="code" href="classimpala_1_1WriteStream.html#ab066287773692c35fb6e8258f27566e8">len_</a>;</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160;};</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160;</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160;} <span class="comment">// namespace impala</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="ttc" id="classimpala_1_1WriteStream_html_a162ac6ac531690856191ca3d31c32d10"><div class="ttname"><a href="classimpala_1_1WriteStream.html#a162ac6ac531690856191ca3d31c32d10">impala::WriteStream::WriteZLong</a></div><div class="ttdeci">int WriteZLong(int64_t val)</div><div class="ttdef"><b>Definition:</b> <a href="write-stream_8inline_8h_source.html#l00060">write-stream.inline.h:60</a></div></div>
<div class="ttc" id="classimpala_1_1WriteStream_html_adc516247232bdae74704348d3393487e"><div class="ttname"><a href="classimpala_1_1WriteStream.html#adc516247232bdae74704348d3393487e">impala::WriteStream::WriteBytes</a></div><div class="ttdeci">int WriteBytes(int length, const uint8_t *buf)</div><div class="ttdoc">Writes bytes to the buffer, returns the number of bytes written. </div><div class="ttdef"><b>Definition:</b> <a href="write-stream_8inline_8h_source.html#l00066">write-stream.inline.h:66</a></div></div>
<div class="ttc" id="classimpala_1_1WriteStream_html_a127eebe497919377d4e31251ffea2aff"><div class="ttname"><a href="classimpala_1_1WriteStream.html#a127eebe497919377d4e31251ffea2aff">impala::WriteStream::buffer_</a></div><div class="ttdeci">std::stringstream buffer_</div><div class="ttdoc">TODO consider making this like the parquet writer to avoid extra copy. </div><div class="ttdef"><b>Definition:</b> <a href="write-stream_8h_source.html#l00060">write-stream.h:60</a></div></div>
<div class="ttc" id="classimpala_1_1WriteStream_html_a4177e5bfa7a1df892caedcbbb35e08f7"><div class="ttname"><a href="classimpala_1_1WriteStream.html#a4177e5bfa7a1df892caedcbbb35e08f7">impala::WriteStream::WriteEmptyText</a></div><div class="ttdeci">int WriteEmptyText()</div><div class="ttdoc">Writes an empty string to the buffer (encoded as 1 byte) </div><div class="ttdef"><b>Definition:</b> <a href="write-stream_8inline_8h_source.html#l00083">write-stream.inline.h:83</a></div></div>
<div class="ttc" id="classimpala_1_1WriteStream_html_ab066287773692c35fb6e8258f27566e8"><div class="ttname"><a href="classimpala_1_1WriteStream.html#ab066287773692c35fb6e8258f27566e8">impala::WriteStream::len_</a></div><div class="ttdeci">uint64_t len_</div><div class="ttdef"><b>Definition:</b> <a href="write-stream_8h_source.html#l00061">write-stream.h:61</a></div></div>
<div class="ttc" id="classimpala_1_1WriteStream_html_a92d0858e71b8131cf6a34f42633ddb72"><div class="ttname"><a href="classimpala_1_1WriteStream.html#a92d0858e71b8131cf6a34f42633ddb72">impala::WriteStream::WriteStream</a></div><div class="ttdeci">WriteStream()</div><div class="ttdef"><b>Definition:</b> <a href="write-stream_8h_source.html#l00032">write-stream.h:32</a></div></div>
<div class="ttc" id="classimpala_1_1WriteStream_html_a8227b06023b9a25d5b1f82d22eaac1e0"><div class="ttname"><a href="classimpala_1_1WriteStream.html#a8227b06023b9a25d5b1f82d22eaac1e0">impala::WriteStream::WriteInt</a></div><div class="ttdeci">int WriteInt(uint32_t val)</div><div class="ttdef"><b>Definition:</b> <a href="write-stream_8inline_8h_source.html#l00048">write-stream.inline.h:48</a></div></div>
<div class="ttc" id="classimpala_1_1WriteStream_html_ac78cea54a3b6110df12adf292c5dc2fd"><div class="ttname"><a href="classimpala_1_1WriteStream.html#ac78cea54a3b6110df12adf292c5dc2fd">impala::WriteStream::Clear</a></div><div class="ttdeci">void Clear()</div><div class="ttdef"><b>Definition:</b> <a href="write-stream_8inline_8h_source.html#l00100">write-stream.inline.h:100</a></div></div>
<div class="ttc" id="classimpala_1_1WriteStream_html_a5d9b77c3ad5615727afac94ae2172e5a"><div class="ttname"><a href="classimpala_1_1WriteStream.html#a5d9b77c3ad5615727afac94ae2172e5a">impala::WriteStream::Size</a></div><div class="ttdeci">size_t Size()</div><div class="ttdef"><b>Definition:</b> <a href="write-stream_8inline_8h_source.html#l00096">write-stream.inline.h:96</a></div></div>
<div class="ttc" id="classimpala_1_1WriteStream_html_a7650fe1ac6822124ebab161e0db64aeb"><div class="ttname"><a href="classimpala_1_1WriteStream.html#a7650fe1ac6822124ebab161e0db64aeb">impala::WriteStream::WriteVInt</a></div><div class="ttdeci">int WriteVInt(int32_t val)</div><div class="ttdef"><b>Definition:</b> <a href="write-stream_8inline_8h_source.html#l00042">write-stream.inline.h:42</a></div></div>
<div class="ttc" id="classimpala_1_1WriteStream_html_abe566e3233c8bab1d85c7ac3ff6e6683"><div class="ttname"><a href="classimpala_1_1WriteStream.html#abe566e3233c8bab1d85c7ac3ff6e6683">impala::WriteStream::WriteZInt</a></div><div class="ttdeci">int WriteZInt(int32_t val)</div><div class="ttdoc">Writes a zig-zag encoded integer. </div><div class="ttdef"><b>Definition:</b> <a href="write-stream_8inline_8h_source.html#l00054">write-stream.inline.h:54</a></div></div>
<div class="ttc" id="classimpala_1_1WriteStream_html_a06543cfd2fc74e1a2f4f85ebda30e3e3"><div class="ttname"><a href="classimpala_1_1WriteStream.html#a06543cfd2fc74e1a2f4f85ebda30e3e3">impala::WriteStream::WriteBoolean</a></div><div class="ttdeci">int WriteBoolean(bool val)</div><div class="ttdef"><b>Definition:</b> <a href="write-stream_8inline_8h_source.html#l00087">write-stream.inline.h:87</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_1WriteStream_html_ac371a007920f431e8af46aedd1f5ef03"><div class="ttname"><a href="classimpala_1_1WriteStream.html#ac371a007920f431e8af46aedd1f5ef03">impala::WriteStream::WriteByte</a></div><div class="ttdeci">int WriteByte(uint8_t val)</div><div class="ttdef"><b>Definition:</b> <a href="write-stream_8inline_8h_source.html#l00028">write-stream.inline.h:28</a></div></div>
<div class="ttc" id="classimpala_1_1WriteStream_html_a55a2561036c7f1d6c46a6284b3325a41"><div class="ttname"><a href="classimpala_1_1WriteStream.html#a55a2561036c7f1d6c46a6284b3325a41">impala::WriteStream::WriteText</a></div><div class="ttdeci">int WriteText(int32_t len, const uint8_t *buf)</div><div class="ttdoc">Writes the length as a VLong follows by the byte string. </div><div class="ttdef"><b>Definition:</b> <a href="write-stream_8inline_8h_source.html#l00076">write-stream.inline.h:76</a></div></div>
<div class="ttc" id="status_8h_html"><div class="ttname"><a href="status_8h.html">status.h</a></div></div>
<div class="ttc" id="classimpala_1_1WriteStream_html"><div class="ttname"><a href="classimpala_1_1WriteStream.html">impala::WriteStream</a></div><div class="ttdef"><b>Definition:</b> <a href="write-stream_8h_source.html#l00029">write-stream.h:29</a></div></div>
<div class="ttc" id="classimpala_1_1WriteStream_html_ac2e75a1c018da965587f2e88a22d5509"><div class="ttname"><a href="classimpala_1_1WriteStream.html#ac2e75a1c018da965587f2e88a22d5509">impala::WriteStream::String</a></div><div class="ttdeci">std::string String()</div><div class="ttdoc">returns the contents of this stream as a string </div><div class="ttdef"><b>Definition:</b> <a href="write-stream_8inline_8h_source.html#l00092">write-stream.inline.h:92</a></div></div>
<div class="ttc" id="classimpala_1_1WriteStream_html_aa501cd531486341419537ac69360fd4f"><div class="ttname"><a href="classimpala_1_1WriteStream.html#aa501cd531486341419537ac69360fd4f">impala::WriteStream::WriteVLong</a></div><div class="ttdeci">int WriteVLong(int64_t val)</div><div class="ttdef"><b>Definition:</b> <a href="write-stream_8inline_8h_source.html#l00036">write-stream.inline.h:36</a></div></div>
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