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| <h1>Source code for apache_beam.coders.slow_stream</h1><div class="highlight"><pre> |
| <span></span><span class="c1">#</span> |
| <span class="c1"># Licensed to the Apache Software Foundation (ASF) under one or more</span> |
| <span class="c1"># contributor license agreements. See the NOTICE file distributed with</span> |
| <span class="c1"># this work for additional information regarding copyright ownership.</span> |
| <span class="c1"># The ASF licenses this file to You under the Apache License, Version 2.0</span> |
| <span class="c1"># (the "License"); you may not use this file except in compliance with</span> |
| <span class="c1"># the License. You may obtain a copy of the License at</span> |
| <span class="c1">#</span> |
| <span class="c1"># http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="c1">#</span> |
| <span class="c1"># Unless required by applicable law or agreed to in writing, software</span> |
| <span class="c1"># distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="c1"># WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="c1"># See the License for the specific language governing permissions and</span> |
| <span class="c1"># limitations under the License.</span> |
| <span class="c1">#</span> |
| |
| <span class="sd">"""A pure Python implementation of stream.pyx.</span> |
| |
| <span class="sd">For internal use only; no backwards-compatibility guarantees.</span> |
| <span class="sd">"""</span> |
| <span class="c1"># pytype: skip-file</span> |
| |
| <span class="kn">import</span> <span class="nn">struct</span> |
| <span class="kn">from</span> <span class="nn">typing</span> <span class="kn">import</span> <span class="n">List</span> |
| |
| |
| <div class="viewcode-block" id="OutputStream"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.OutputStream">[docs]</a><span class="k">class</span> <span class="nc">OutputStream</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span> |
| <span class="sd">"""For internal use only; no backwards-compatibility guarantees.</span> |
| |
| <span class="sd"> A pure Python implementation of stream.OutputStream."""</span> |
| <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">data</span> <span class="o">=</span> <span class="p">[]</span> <span class="c1"># type: List[bytes]</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">byte_count</span> <span class="o">=</span> <span class="mi">0</span> |
| |
| <div class="viewcode-block" id="OutputStream.write"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.OutputStream.write">[docs]</a> <span class="k">def</span> <span class="nf">write</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">b</span><span class="p">,</span> <span class="n">nested</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> |
| <span class="c1"># type: (bytes, bool) -> None</span> |
| <span class="k">assert</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">b</span><span class="p">,</span> <span class="nb">bytes</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">nested</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">write_var_int64</span><span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">b</span><span class="p">))</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">data</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">b</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">byte_count</span> <span class="o">+=</span> <span class="nb">len</span><span class="p">(</span><span class="n">b</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="OutputStream.write_byte"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.OutputStream.write_byte">[docs]</a> <span class="k">def</span> <span class="nf">write_byte</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">val</span><span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">data</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="nb">chr</span><span class="p">(</span><span class="n">val</span><span class="p">)</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="s1">'latin-1'</span><span class="p">))</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">byte_count</span> <span class="o">+=</span> <span class="mi">1</span></div> |
| |
| <div class="viewcode-block" id="OutputStream.write_var_int64"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.OutputStream.write_var_int64">[docs]</a> <span class="k">def</span> <span class="nf">write_var_int64</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">v</span><span class="p">):</span> |
| <span class="c1"># type: (int) -> None</span> |
| <span class="k">if</span> <span class="n">v</span> <span class="o"><</span> <span class="mi">0</span><span class="p">:</span> |
| <span class="n">v</span> <span class="o">+=</span> <span class="mi">1</span> <span class="o"><<</span> <span class="mi">64</span> |
| <span class="k">if</span> <span class="n">v</span> <span class="o"><=</span> <span class="mi">0</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'Value too large (negative).'</span><span class="p">)</span> |
| <span class="k">while</span> <span class="kc">True</span><span class="p">:</span> |
| <span class="n">bits</span> <span class="o">=</span> <span class="n">v</span> <span class="o">&</span> <span class="mh">0x7F</span> |
| <span class="n">v</span> <span class="o">>>=</span> <span class="mi">7</span> |
| <span class="k">if</span> <span class="n">v</span><span class="p">:</span> |
| <span class="n">bits</span> <span class="o">|=</span> <span class="mh">0x80</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">write_byte</span><span class="p">(</span><span class="n">bits</span><span class="p">)</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">v</span><span class="p">:</span> |
| <span class="k">break</span></div> |
| |
| <div class="viewcode-block" id="OutputStream.write_bigendian_int64"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.OutputStream.write_bigendian_int64">[docs]</a> <span class="k">def</span> <span class="nf">write_bigendian_int64</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">v</span><span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">struct</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="s1">'>q'</span><span class="p">,</span> <span class="n">v</span><span class="p">))</span></div> |
| |
| <div class="viewcode-block" id="OutputStream.write_bigendian_uint64"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.OutputStream.write_bigendian_uint64">[docs]</a> <span class="k">def</span> <span class="nf">write_bigendian_uint64</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">v</span><span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">struct</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="s1">'>Q'</span><span class="p">,</span> <span class="n">v</span><span class="p">))</span></div> |
| |
| <div class="viewcode-block" id="OutputStream.write_bigendian_int32"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.OutputStream.write_bigendian_int32">[docs]</a> <span class="k">def</span> <span class="nf">write_bigendian_int32</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">v</span><span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">struct</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="s1">'>i'</span><span class="p">,</span> <span class="n">v</span><span class="p">))</span></div> |
| |
| <div class="viewcode-block" id="OutputStream.write_bigendian_double"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.OutputStream.write_bigendian_double">[docs]</a> <span class="k">def</span> <span class="nf">write_bigendian_double</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">v</span><span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">struct</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="s1">'>d'</span><span class="p">,</span> <span class="n">v</span><span class="p">))</span></div> |
| |
| <div class="viewcode-block" id="OutputStream.get"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.OutputStream.get">[docs]</a> <span class="k">def</span> <span class="nf">get</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="c1"># type: () -> bytes</span> |
| <span class="k">return</span> <span class="sa">b</span><span class="s1">''</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">data</span><span class="p">)</span></div> |
| |
| <div class="viewcode-block" id="OutputStream.size"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.OutputStream.size">[docs]</a> <span class="k">def</span> <span class="nf">size</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="c1"># type: () -> int</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">byte_count</span></div> |
| |
| <span class="k">def</span> <span class="nf">_clear</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="c1"># type: () -> None</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">data</span> <span class="o">=</span> <span class="p">[]</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">byte_count</span> <span class="o">=</span> <span class="mi">0</span></div> |
| |
| |
| <div class="viewcode-block" id="ByteCountingOutputStream"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.ByteCountingOutputStream">[docs]</a><span class="k">class</span> <span class="nc">ByteCountingOutputStream</span><span class="p">(</span><span class="n">OutputStream</span><span class="p">):</span> |
| <span class="sd">"""For internal use only; no backwards-compatibility guarantees.</span> |
| |
| <span class="sd"> A pure Python implementation of stream.ByteCountingOutputStream."""</span> |
| <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="c1"># Note that we don't actually use any of the data initialized by our super.</span> |
| <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">()</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">count</span> <span class="o">=</span> <span class="mi">0</span> |
| |
| <div class="viewcode-block" id="ByteCountingOutputStream.write"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.ByteCountingOutputStream.write">[docs]</a> <span class="k">def</span> <span class="nf">write</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">byte_array</span><span class="p">,</span> <span class="n">nested</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span> |
| <span class="c1"># type: (bytes, bool) -> None</span> |
| <span class="n">blen</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">byte_array</span><span class="p">)</span> |
| <span class="k">if</span> <span class="n">nested</span><span class="p">:</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">write_var_int64</span><span class="p">(</span><span class="n">blen</span><span class="p">)</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">count</span> <span class="o">+=</span> <span class="n">blen</span></div> |
| |
| <div class="viewcode-block" id="ByteCountingOutputStream.write_byte"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.ByteCountingOutputStream.write_byte">[docs]</a> <span class="k">def</span> <span class="nf">write_byte</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">_</span><span class="p">):</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">count</span> <span class="o">+=</span> <span class="mi">1</span></div> |
| |
| <div class="viewcode-block" id="ByteCountingOutputStream.get_count"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.ByteCountingOutputStream.get_count">[docs]</a> <span class="k">def</span> <span class="nf">get_count</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">count</span></div> |
| |
| <div class="viewcode-block" id="ByteCountingOutputStream.get"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.ByteCountingOutputStream.get">[docs]</a> <span class="k">def</span> <span class="nf">get</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">NotImplementedError</span></div> |
| |
| <span class="k">def</span> <span class="fm">__str__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">return</span> <span class="s1">'<</span><span class="si">%s</span><span class="s1"> </span><span class="si">%s</span><span class="s1">>'</span> <span class="o">%</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">count</span><span class="p">)</span></div> |
| |
| |
| <div class="viewcode-block" id="InputStream"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.InputStream">[docs]</a><span class="k">class</span> <span class="nc">InputStream</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span> |
| <span class="sd">"""For internal use only; no backwards-compatibility guarantees.</span> |
| |
| <span class="sd"> A pure Python implementation of stream.InputStream."""</span> |
| <span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">data</span><span class="p">):</span> |
| <span class="c1"># type: (bytes) -> None</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">data</span> <span class="o">=</span> <span class="n">data</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">pos</span> <span class="o">=</span> <span class="mi">0</span> |
| |
| <div class="viewcode-block" id="InputStream.size"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.InputStream.size">[docs]</a> <span class="k">def</span> <span class="nf">size</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">return</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">data</span><span class="p">)</span> <span class="o">-</span> <span class="bp">self</span><span class="o">.</span><span class="n">pos</span></div> |
| |
| <div class="viewcode-block" id="InputStream.read"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.InputStream.read">[docs]</a> <span class="k">def</span> <span class="nf">read</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">size</span><span class="p">):</span> |
| <span class="c1"># type: (int) -> bytes</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">pos</span> <span class="o">+=</span> <span class="n">size</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">data</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">pos</span> <span class="o">-</span> <span class="n">size</span><span class="p">:</span><span class="bp">self</span><span class="o">.</span><span class="n">pos</span><span class="p">]</span></div> |
| |
| <div class="viewcode-block" id="InputStream.read_all"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.InputStream.read_all">[docs]</a> <span class="k">def</span> <span class="nf">read_all</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">nested</span><span class="p">):</span> |
| <span class="c1"># type: (bool) -> bytes</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">read_var_int64</span><span class="p">()</span> <span class="k">if</span> <span class="n">nested</span> <span class="k">else</span> <span class="bp">self</span><span class="o">.</span><span class="n">size</span><span class="p">())</span></div> |
| |
| <div class="viewcode-block" id="InputStream.read_byte"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.InputStream.read_byte">[docs]</a> <span class="k">def</span> <span class="nf">read_byte</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="c1"># type: () -> int</span> |
| <span class="bp">self</span><span class="o">.</span><span class="n">pos</span> <span class="o">+=</span> <span class="mi">1</span> |
| <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">data</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">pos</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span></div> |
| |
| <div class="viewcode-block" id="InputStream.read_var_int64"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.InputStream.read_var_int64">[docs]</a> <span class="k">def</span> <span class="nf">read_var_int64</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="n">shift</span> <span class="o">=</span> <span class="mi">0</span> |
| <span class="n">result</span> <span class="o">=</span> <span class="mi">0</span> |
| <span class="k">while</span> <span class="kc">True</span><span class="p">:</span> |
| <span class="n">byte</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">read_byte</span><span class="p">()</span> |
| <span class="k">if</span> <span class="n">byte</span> <span class="o"><</span> <span class="mi">0</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s1">'VarLong not terminated.'</span><span class="p">)</span> |
| |
| <span class="n">bits</span> <span class="o">=</span> <span class="n">byte</span> <span class="o">&</span> <span class="mh">0x7F</span> |
| <span class="k">if</span> <span class="n">shift</span> <span class="o">>=</span> <span class="mi">64</span> <span class="ow">or</span> <span class="p">(</span><span class="n">shift</span> <span class="o">>=</span> <span class="mi">63</span> <span class="ow">and</span> <span class="n">bits</span> <span class="o">></span> <span class="mi">1</span><span class="p">):</span> |
| <span class="k">raise</span> <span class="ne">RuntimeError</span><span class="p">(</span><span class="s1">'VarLong too long.'</span><span class="p">)</span> |
| <span class="n">result</span> <span class="o">|=</span> <span class="n">bits</span> <span class="o"><<</span> <span class="n">shift</span> |
| <span class="n">shift</span> <span class="o">+=</span> <span class="mi">7</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">byte</span> <span class="o">&</span> <span class="mh">0x80</span><span class="p">:</span> |
| <span class="k">break</span> |
| <span class="k">if</span> <span class="n">result</span> <span class="o">>=</span> <span class="mi">1</span> <span class="o"><<</span> <span class="mi">63</span><span class="p">:</span> |
| <span class="n">result</span> <span class="o">-=</span> <span class="mi">1</span> <span class="o"><<</span> <span class="mi">64</span> |
| <span class="k">return</span> <span class="n">result</span></div> |
| |
| <div class="viewcode-block" id="InputStream.read_bigendian_int64"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.InputStream.read_bigendian_int64">[docs]</a> <span class="k">def</span> <span class="nf">read_bigendian_int64</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">return</span> <span class="n">struct</span><span class="o">.</span><span class="n">unpack</span><span class="p">(</span><span class="s1">'>q'</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="mi">8</span><span class="p">))[</span><span class="mi">0</span><span class="p">]</span></div> |
| |
| <div class="viewcode-block" id="InputStream.read_bigendian_uint64"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.InputStream.read_bigendian_uint64">[docs]</a> <span class="k">def</span> <span class="nf">read_bigendian_uint64</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">return</span> <span class="n">struct</span><span class="o">.</span><span class="n">unpack</span><span class="p">(</span><span class="s1">'>Q'</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="mi">8</span><span class="p">))[</span><span class="mi">0</span><span class="p">]</span></div> |
| |
| <div class="viewcode-block" id="InputStream.read_bigendian_int32"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.InputStream.read_bigendian_int32">[docs]</a> <span class="k">def</span> <span class="nf">read_bigendian_int32</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">return</span> <span class="n">struct</span><span class="o">.</span><span class="n">unpack</span><span class="p">(</span><span class="s1">'>i'</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="mi">4</span><span class="p">))[</span><span class="mi">0</span><span class="p">]</span></div> |
| |
| <div class="viewcode-block" id="InputStream.read_bigendian_double"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.InputStream.read_bigendian_double">[docs]</a> <span class="k">def</span> <span class="nf">read_bigendian_double</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> |
| <span class="k">return</span> <span class="n">struct</span><span class="o">.</span><span class="n">unpack</span><span class="p">(</span><span class="s1">'>d'</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="mi">8</span><span class="p">))[</span><span class="mi">0</span><span class="p">]</span></div></div> |
| |
| |
| <div class="viewcode-block" id="get_varint_size"><a class="viewcode-back" href="../../../apache_beam.coders.slow_stream.html#apache_beam.coders.slow_stream.get_varint_size">[docs]</a><span class="k">def</span> <span class="nf">get_varint_size</span><span class="p">(</span><span class="n">v</span><span class="p">):</span> |
| <span class="sd">"""For internal use only; no backwards-compatibility guarantees.</span> |
| |
| <span class="sd"> Returns the size of the given integer value when encode as a VarInt."""</span> |
| <span class="k">if</span> <span class="n">v</span> <span class="o"><</span> <span class="mi">0</span><span class="p">:</span> |
| <span class="n">v</span> <span class="o">+=</span> <span class="mi">1</span> <span class="o"><<</span> <span class="mi">64</span> |
| <span class="k">if</span> <span class="n">v</span> <span class="o"><=</span> <span class="mi">0</span><span class="p">:</span> |
| <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s1">'Value too large (negative).'</span><span class="p">)</span> |
| <span class="n">varint_size</span> <span class="o">=</span> <span class="mi">0</span> |
| <span class="k">while</span> <span class="kc">True</span><span class="p">:</span> |
| <span class="n">varint_size</span> <span class="o">+=</span> <span class="mi">1</span> |
| <span class="n">v</span> <span class="o">>>=</span> <span class="mi">7</span> |
| <span class="k">if</span> <span class="ow">not</span> <span class="n">v</span><span class="p">:</span> |
| <span class="k">break</span> |
| <span class="k">return</span> <span class="n">varint_size</span></div> |
| </pre></div> |
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