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<p><code>PENGY_HASH</code> is a translation to Fortran 2008 and signed two's complement
arithmetic of the <code>pengyhash</code> algorithm of Alberto Fajardo, copyright 2020.
Alberto Fajardo's original C code, <code>pengyhash.c</code>, is available at the URL:
https://github.com/tinypeng/pengyhash/blob/master/pengyhash.c
under the BSD 2-Clause License:
https://github.com/tinypeng/pengyhash/blob/master/LICENSE</p>
<p>The BSD 2-Clause license is as follows:</p>
<p>BSD 2-Clause License</p>
<p>pengyhash
Copyright (c) 2020 Alberto Fajardo
All rights reserved.</p>
<p>Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:</p>
<ol>
<li>
<p>Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.</p>
</li>
<li>
<p>Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.</p>
</li>
</ol>
<p>THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.</p>
<hr>
<br>
<br>
<section>
<h2><span class="anchor" id="src"></span>Source Code</h2>
<div class="hl codehilite"><pre><span></span><a id="ln-1" name="ln-1" href="#ln-1"></a><span class="c">!!------------------------------------------------------------------------------</span>
<a id="ln-2" name="ln-2" href="#ln-2"></a><span class="c">!! `PENGY_HASH` is a translation to Fortran 2008 and signed two's complement</span>
<a id="ln-3" name="ln-3" href="#ln-3"></a><span class="c">!! arithmetic of the `pengyhash` algorithm of Alberto Fajardo, copyright 2020.</span>
<a id="ln-4" name="ln-4" href="#ln-4"></a><span class="c">!! Alberto Fajardo's original C code, `pengyhash.c`, is available at the URL:</span>
<a id="ln-5" name="ln-5" href="#ln-5"></a><span class="c">!! https://github.com/tinypeng/pengyhash/blob/master/pengyhash.c</span>
<a id="ln-6" name="ln-6" href="#ln-6"></a><span class="c">!! under the BSD 2-Clause License:</span>
<a id="ln-7" name="ln-7" href="#ln-7"></a><span class="c">!! https://github.com/tinypeng/pengyhash/blob/master/LICENSE</span>
<a id="ln-8" name="ln-8" href="#ln-8"></a><span class="c">!!</span>
<a id="ln-9" name="ln-9" href="#ln-9"></a><span class="c">!! The BSD 2-Clause license is as follows:</span>
<a id="ln-10" name="ln-10" href="#ln-10"></a><span class="c">!!</span>
<a id="ln-11" name="ln-11" href="#ln-11"></a><span class="c">!! BSD 2-Clause License</span>
<a id="ln-12" name="ln-12" href="#ln-12"></a><span class="c">!!</span>
<a id="ln-13" name="ln-13" href="#ln-13"></a><span class="c">!! pengyhash</span>
<a id="ln-14" name="ln-14" href="#ln-14"></a><span class="c">!! Copyright (c) 2020 Alberto Fajardo</span>
<a id="ln-15" name="ln-15" href="#ln-15"></a><span class="c">!! All rights reserved.</span>
<a id="ln-16" name="ln-16" href="#ln-16"></a><span class="c">!!</span>
<a id="ln-17" name="ln-17" href="#ln-17"></a><span class="c">!! Redistribution and use in source and binary forms, with or without</span>
<a id="ln-18" name="ln-18" href="#ln-18"></a><span class="c">!! modification, are permitted provided that the following conditions are met:</span>
<a id="ln-19" name="ln-19" href="#ln-19"></a><span class="c">!!</span>
<a id="ln-20" name="ln-20" href="#ln-20"></a><span class="c">!! 1. Redistributions of source code must retain the above copyright notice,</span>
<a id="ln-21" name="ln-21" href="#ln-21"></a><span class="c">!! this list of conditions and the following disclaimer.</span>
<a id="ln-22" name="ln-22" href="#ln-22"></a><span class="c">!!</span>
<a id="ln-23" name="ln-23" href="#ln-23"></a><span class="c">!! 2. Redistributions in binary form must reproduce the above copyright notice,</span>
<a id="ln-24" name="ln-24" href="#ln-24"></a><span class="c">!! this list of conditions and the following disclaimer in the documentation</span>
<a id="ln-25" name="ln-25" href="#ln-25"></a><span class="c">!! and/or other materials provided with the distribution.</span>
<a id="ln-26" name="ln-26" href="#ln-26"></a><span class="c">!!</span>
<a id="ln-27" name="ln-27" href="#ln-27"></a><span class="c">!! THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"</span>
<a id="ln-28" name="ln-28" href="#ln-28"></a><span class="c">!! AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE</span>
<a id="ln-29" name="ln-29" href="#ln-29"></a><span class="c">!! IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE</span>
<a id="ln-30" name="ln-30" href="#ln-30"></a><span class="c">!! ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE</span>
<a id="ln-31" name="ln-31" href="#ln-31"></a><span class="c">!! LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR</span>
<a id="ln-32" name="ln-32" href="#ln-32"></a><span class="c">!! CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF</span>
<a id="ln-33" name="ln-33" href="#ln-33"></a><span class="c">!! SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS</span>
<a id="ln-34" name="ln-34" href="#ln-34"></a><span class="c">!! INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN</span>
<a id="ln-35" name="ln-35" href="#ln-35"></a><span class="c">!! CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)</span>
<a id="ln-36" name="ln-36" href="#ln-36"></a><span class="c">!! ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE</span>
<a id="ln-37" name="ln-37" href="#ln-37"></a><span class="c">!! POSSIBILITY OF SUCH DAMAGE.</span>
<a id="ln-38" name="ln-38" href="#ln-38"></a><span class="c">!!------------------------------------------------------------------------------</span>
<a id="ln-39" name="ln-39" href="#ln-39"></a>
<a id="ln-40" name="ln-40" href="#ln-40"></a><span class="cp">#! Integer kinds to be considered during templating</span>
<a id="ln-41" name="ln-41" href="#ln-41"></a><span class="cp">#:set INT_KINDS = ["int16", "int32", "int64"]</span>
<a id="ln-42" name="ln-42" href="#ln-42"></a>
<a id="ln-43" name="ln-43" href="#ln-43"></a><span class="k">submodule</span><span class="p">(</span><span class="n">stdlib_hash_64bit</span><span class="p">)</span><span class="w"> </span><span class="n">stdlib_hash_64bit_pengy</span>
<a id="ln-44" name="ln-44" href="#ln-44"></a>
<a id="ln-45" name="ln-45" href="#ln-45"></a><span class="w"> </span><span class="k">implicit none</span>
<a id="ln-46" name="ln-46" href="#ln-46"></a>
<a id="ln-47" name="ln-47" href="#ln-47"></a><span class="k">contains</span>
<a id="ln-48" name="ln-48" href="#ln-48"></a>
<a id="ln-49" name="ln-49" href="#ln-49"></a><span class="k"> pure module function </span><span class="n">int8_pengy_hash</span><span class="p">(</span><span class="w"> </span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">seed</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="k">result</span><span class="p">(</span><span class="n">hash_code</span><span class="p">)</span>
<a id="ln-50" name="ln-50" href="#ln-50"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int64</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">hash_code</span>
<a id="ln-51" name="ln-51" href="#ln-51"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int8</span><span class="p">),</span><span class="w"> </span><span class="k">intent</span><span class="p">(</span><span class="n">in</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">key</span><span class="p">(</span><span class="mi">0</span><span class="p">:)</span>
<a id="ln-52" name="ln-52" href="#ln-52"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int32</span><span class="p">),</span><span class="w"> </span><span class="k">intent</span><span class="p">(</span><span class="n">in</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">seed</span>
<a id="ln-53" name="ln-53" href="#ln-53"></a>
<a id="ln-54" name="ln-54" href="#ln-54"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int64</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">b</span><span class="p">(</span><span class="mi">0</span><span class="p">:</span><span class="mi">3</span><span class="p">)</span>
<a id="ln-55" name="ln-55" href="#ln-55"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int64</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">i</span>
<a id="ln-56" name="ln-56" href="#ln-56"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int64</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="nb">index</span>
<a id="ln-57" name="ln-57" href="#ln-57"></a><span class="nb"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int64</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="nb">len</span>
<a id="ln-58" name="ln-58" href="#ln-58"></a><span class="nb"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int64</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">0</span><span class="p">:</span><span class="mi">3</span><span class="p">)</span>
<a id="ln-59" name="ln-59" href="#ln-59"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int64</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">seed2</span>
<a id="ln-60" name="ln-60" href="#ln-60"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int8</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">dummy</span><span class="p">(</span><span class="mi">0</span><span class="p">:</span><span class="mi">31</span><span class="p">)</span>
<a id="ln-61" name="ln-61" href="#ln-61"></a>
<a id="ln-62" name="ln-62" href="#ln-62"></a><span class="w"> </span><span class="n">b</span><span class="p">(</span><span class="mi">0</span><span class="p">:</span><span class="mi">3</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0_int64</span>
<a id="ln-63" name="ln-63" href="#ln-63"></a><span class="w"> </span><span class="nb">len</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">size</span><span class="p">(</span><span class="w"> </span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="nb">kind</span><span class="o">=</span><span class="n">int64</span><span class="w"> </span><span class="p">)</span>
<a id="ln-64" name="ln-64" href="#ln-64"></a><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">0</span><span class="p">:</span><span class="mi">3</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">[</span><span class="w"> </span><span class="mi">0_int64</span><span class="p">,</span><span class="w"> </span><span class="mi">0_int64</span><span class="p">,</span><span class="w"> </span><span class="mi">0_int64</span><span class="p">,</span><span class="w"> </span><span class="nb">len</span><span class="w"> </span><span class="p">]</span>
<a id="ln-65" name="ln-65" href="#ln-65"></a>
<a id="ln-66" name="ln-66" href="#ln-66"></a><span class="w"> </span><span class="nb">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0_int64</span>
<a id="ln-67" name="ln-67" href="#ln-67"></a><span class="w"> </span><span class="k">do while</span><span class="w"> </span><span class="p">(</span><span class="w"> </span><span class="nb">len</span><span class="w"> </span><span class="o">>=</span><span class="w"> </span><span class="mi">32</span><span class="w"> </span><span class="p">)</span>
<a id="ln-68" name="ln-68" href="#ln-68"></a><span class="w"> </span><span class="n">b</span><span class="p">(</span><span class="mi">0</span><span class="p">:</span><span class="mi">3</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">transfer</span><span class="p">(</span><span class="w"> </span><span class="n">key</span><span class="p">(</span><span class="w"> </span><span class="nb">index</span><span class="p">:</span><span class="nb">index</span><span class="o">+</span><span class="mi">31</span><span class="w"> </span><span class="p">),</span><span class="w"> </span><span class="mi">0_int64</span><span class="p">,</span><span class="w"> </span><span class="mi">4</span><span class="w"> </span><span class="p">)</span>
<a id="ln-69" name="ln-69" href="#ln-69"></a>
<a id="ln-70" name="ln-70" href="#ln-70"></a><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">b</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span>
<a id="ln-71" name="ln-71" href="#ln-71"></a><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="nb">ishftc</span><span class="p">(</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">1</span><span class="p">),</span><span class="w"> </span><span class="mi">14</span><span class="w"> </span><span class="p">)</span>
<a id="ln-72" name="ln-72" href="#ln-72"></a><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">b</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
<a id="ln-73" name="ln-73" href="#ln-73"></a><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="nb">ishftc</span><span class="p">(</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">3</span><span class="p">),</span><span class="w"> </span><span class="mi">23</span><span class="w"> </span><span class="p">)</span>
<a id="ln-74" name="ln-74" href="#ln-74"></a><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">b</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
<a id="ln-75" name="ln-75" href="#ln-75"></a><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">ieor</span><span class="p">(</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">0</span><span class="p">),</span><span class="w"> </span><span class="nb">ishftc</span><span class="p">(</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">3</span><span class="p">),</span><span class="w"> </span><span class="mi">16</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="p">)</span>
<a id="ln-76" name="ln-76" href="#ln-76"></a><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">b</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
<a id="ln-77" name="ln-77" href="#ln-77"></a><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">ieor</span><span class="p">(</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">2</span><span class="p">),</span><span class="w"> </span><span class="nb">ishftc</span><span class="p">(</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">1</span><span class="p">),</span><span class="w"> </span><span class="mi">40</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="p">)</span>
<a id="ln-78" name="ln-78" href="#ln-78"></a>
<a id="ln-79" name="ln-79" href="#ln-79"></a><span class="w"> </span><span class="nb">len</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">len</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="mi">32</span>
<a id="ln-80" name="ln-80" href="#ln-80"></a><span class="w"> </span><span class="nb">index</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">index</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="mi">32</span>
<a id="ln-81" name="ln-81" href="#ln-81"></a><span class="w"> </span><span class="k">end do</span>
<a id="ln-82" name="ln-82" href="#ln-82"></a>
<a id="ln-83" name="ln-83" href="#ln-83"></a><span class="k"> </span><span class="n">dummy</span><span class="p">(</span><span class="mi">0</span><span class="p">:</span><span class="mi">31</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">transfer</span><span class="p">(</span><span class="w"> </span><span class="n">b</span><span class="p">,</span><span class="w"> </span><span class="mi">0_int8</span><span class="p">,</span><span class="w"> </span><span class="mi">32</span><span class="w"> </span><span class="p">)</span>
<a id="ln-84" name="ln-84" href="#ln-84"></a><span class="w"> </span><span class="n">dummy</span><span class="p">(</span><span class="mi">0</span><span class="p">:</span><span class="nb">len</span><span class="o">-</span><span class="mi">1</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">key</span><span class="p">(</span><span class="nb">index</span><span class="p">:</span><span class="nb">index</span><span class="o">+</span><span class="nb">len</span><span class="o">-</span><span class="mi">1</span><span class="p">)</span>
<a id="ln-85" name="ln-85" href="#ln-85"></a><span class="w"> </span><span class="n">b</span><span class="p">(</span><span class="mi">0</span><span class="p">:</span><span class="mi">3</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">transfer</span><span class="p">(</span><span class="w"> </span><span class="n">dummy</span><span class="p">,</span><span class="w"> </span><span class="mi">0_int64</span><span class="p">,</span><span class="w"> </span><span class="mi">4</span><span class="p">)</span>
<a id="ln-86" name="ln-86" href="#ln-86"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="w"> </span><span class="n">little_endian</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="k">then</span>
<a id="ln-87" name="ln-87" href="#ln-87"></a><span class="k"> </span><span class="n">seed2</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">transfer</span><span class="p">(</span><span class="w"> </span><span class="p">[</span><span class="w"> </span><span class="n">seed</span><span class="p">,</span><span class="w"> </span><span class="mi">0_int32</span><span class="w"> </span><span class="p">],</span><span class="w"> </span><span class="mi">0_int64</span><span class="w"> </span><span class="p">)</span>
<a id="ln-88" name="ln-88" href="#ln-88"></a><span class="w"> </span><span class="k">else</span>
<a id="ln-89" name="ln-89" href="#ln-89"></a><span class="k"> </span><span class="n">seed2</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">transfer</span><span class="p">(</span><span class="w"> </span><span class="p">[</span><span class="w"> </span><span class="mi">0_int32</span><span class="p">,</span><span class="w"> </span><span class="n">seed</span><span class="w"> </span><span class="p">],</span><span class="w"> </span><span class="mi">0_int64</span><span class="w"> </span><span class="p">)</span>
<a id="ln-90" name="ln-90" href="#ln-90"></a><span class="w"> </span><span class="k">end if</span>
<a id="ln-91" name="ln-91" href="#ln-91"></a>
<a id="ln-92" name="ln-92" href="#ln-92"></a><span class="k"> do </span><span class="n">i</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span><span class="w"> </span><span class="mi">5</span>
<a id="ln-93" name="ln-93" href="#ln-93"></a><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">b</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span>
<a id="ln-94" name="ln-94" href="#ln-94"></a><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="nb">ishftc</span><span class="p">(</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">1</span><span class="p">),</span><span class="w"> </span><span class="mi">14</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">seed2</span>
<a id="ln-95" name="ln-95" href="#ln-95"></a><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">b</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
<a id="ln-96" name="ln-96" href="#ln-96"></a><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="nb">ishftc</span><span class="p">(</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">3</span><span class="p">),</span><span class="w"> </span><span class="mi">23</span><span class="w"> </span><span class="p">)</span>
<a id="ln-97" name="ln-97" href="#ln-97"></a><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">b</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
<a id="ln-98" name="ln-98" href="#ln-98"></a><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">ieor</span><span class="p">(</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">0</span><span class="p">),</span><span class="w"> </span><span class="nb">ishftc</span><span class="p">(</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">3</span><span class="p">),</span><span class="w"> </span><span class="mi">16</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="p">)</span>
<a id="ln-99" name="ln-99" href="#ln-99"></a><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">b</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
<a id="ln-100" name="ln-100" href="#ln-100"></a><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">ieor</span><span class="p">(</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">2</span><span class="p">),</span><span class="w"> </span><span class="nb">ishftc</span><span class="p">(</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">1</span><span class="p">),</span><span class="w"> </span><span class="mi">40</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="p">)</span>
<a id="ln-101" name="ln-101" href="#ln-101"></a><span class="w"> </span><span class="k">end do</span>
<a id="ln-102" name="ln-102" href="#ln-102"></a>
<a id="ln-103" name="ln-103" href="#ln-103"></a><span class="k"> </span><span class="n">hash_code</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">s</span><span class="p">(</span><span class="mi">3</span><span class="p">)</span>
<a id="ln-104" name="ln-104" href="#ln-104"></a>
<a id="ln-105" name="ln-105" href="#ln-105"></a><span class="w"> </span><span class="k">end function </span><span class="n">int8_pengy_hash</span>
<a id="ln-106" name="ln-106" href="#ln-106"></a>
<a id="ln-107" name="ln-107" href="#ln-107"></a><span class="cp">#:for k1 in INT_KINDS</span>
<a id="ln-108" name="ln-108" href="#ln-108"></a><span class="w"> </span><span class="k">pure module function</span><span class="w"> </span><span class="err">${</span><span class="n">k1</span><span class="err">}$_</span><span class="n">pengy_hash</span><span class="p">(</span><span class="w"> </span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">seed</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="k">result</span><span class="p">(</span><span class="n">hash_code</span><span class="p">)</span>
<a id="ln-109" name="ln-109" href="#ln-109"></a><span class="c">!! PENGY_HASH hash function for rank 1 array keys of kind ${k1}$</span>
<a id="ln-110" name="ln-110" href="#ln-110"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="err">${</span><span class="n">k1</span><span class="err">}$</span><span class="p">),</span><span class="w"> </span><span class="k">intent</span><span class="p">(</span><span class="n">in</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">key</span><span class="p">(:)</span>
<a id="ln-111" name="ln-111" href="#ln-111"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int32</span><span class="p">),</span><span class="w"> </span><span class="k">intent</span><span class="p">(</span><span class="n">in</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">seed</span>
<a id="ln-112" name="ln-112" href="#ln-112"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int64</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">hash_code</span>
<a id="ln-113" name="ln-113" href="#ln-113"></a>
<a id="ln-114" name="ln-114" href="#ln-114"></a><span class="w"> </span><span class="n">hash_code</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">int8_pengy_hash</span><span class="p">(</span><span class="w"> </span><span class="nb">transfer</span><span class="p">(</span><span class="w"> </span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="mi">0_int8</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-115" name="ln-115" href="#ln-115"></a><span class="w"> </span><span class="n">bytes_$</span><span class="err">{</span><span class="n">k1</span><span class="err">}$</span><span class="o">*</span><span class="n">size</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="nb">kind</span><span class="o">=</span><span class="n">int64</span><span class="p">)</span><span class="w"> </span><span class="p">),</span><span class="w"> </span><span class="n">seed</span><span class="p">)</span>
<a id="ln-116" name="ln-116" href="#ln-116"></a>
<a id="ln-117" name="ln-117" href="#ln-117"></a><span class="w"> </span><span class="k">end function</span><span class="w"> </span><span class="err">${</span><span class="n">k1</span><span class="err">}$_</span><span class="n">pengy_hash</span>
<a id="ln-118" name="ln-118" href="#ln-118"></a>
<a id="ln-119" name="ln-119" href="#ln-119"></a><span class="cp">#:endfor</span>
<a id="ln-120" name="ln-120" href="#ln-120"></a>
<a id="ln-121" name="ln-121" href="#ln-121"></a><span class="w"> </span><span class="k">elemental module function </span><span class="n">character_pengy_hash</span><span class="p">(</span><span class="w"> </span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="n">seed</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="p">&</span>
<a id="ln-122" name="ln-122" href="#ln-122"></a><span class="w"> </span><span class="k">result</span><span class="p">(</span><span class="n">hash_code</span><span class="p">)</span>
<a id="ln-123" name="ln-123" href="#ln-123"></a><span class="c">!! PENGY_HASH hash function for default character keys</span>
<a id="ln-124" name="ln-124" href="#ln-124"></a><span class="w"> </span><span class="kt">character</span><span class="p">(</span><span class="o">*</span><span class="p">),</span><span class="w"> </span><span class="k">intent</span><span class="p">(</span><span class="n">in</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">key</span>
<a id="ln-125" name="ln-125" href="#ln-125"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int32</span><span class="p">),</span><span class="w"> </span><span class="k">intent</span><span class="p">(</span><span class="n">in</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">seed</span>
<a id="ln-126" name="ln-126" href="#ln-126"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int64</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">hash_code</span>
<a id="ln-127" name="ln-127" href="#ln-127"></a>
<a id="ln-128" name="ln-128" href="#ln-128"></a><span class="w"> </span><span class="n">hash_code</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">int8_pengy_hash</span><span class="p">(</span><span class="w"> </span><span class="nb">transfer</span><span class="p">(</span><span class="w"> </span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="mi">0_int8</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-129" name="ln-129" href="#ln-129"></a><span class="w"> </span><span class="n">bytes_char</span><span class="o">*</span><span class="nb">len</span><span class="p">(</span><span class="n">key</span><span class="p">,</span><span class="w"> </span><span class="nb">kind</span><span class="o">=</span><span class="n">int64</span><span class="p">)</span><span class="w"> </span><span class="p">),</span><span class="w"> </span><span class="n">seed</span><span class="p">)</span>
<a id="ln-130" name="ln-130" href="#ln-130"></a>
<a id="ln-131" name="ln-131" href="#ln-131"></a><span class="w"> </span><span class="k">end function </span><span class="n">character_pengy_hash</span>
<a id="ln-132" name="ln-132" href="#ln-132"></a>
<a id="ln-133" name="ln-133" href="#ln-133"></a><span class="w"> </span><span class="k">module subroutine </span><span class="n">new_pengy_hash_seed</span><span class="p">(</span><span class="w"> </span><span class="n">seed</span><span class="w"> </span><span class="p">)</span>
<a id="ln-134" name="ln-134" href="#ln-134"></a><span class="c">! Random SEED generator for PENGY_HASH</span>
<a id="ln-135" name="ln-135" href="#ln-135"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int32</span><span class="p">),</span><span class="w"> </span><span class="k">intent</span><span class="p">(</span><span class="n">inout</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">seed</span>
<a id="ln-136" name="ln-136" href="#ln-136"></a><span class="w"> </span><span class="kt">real</span><span class="p">(</span><span class="n">dp</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">sample</span>
<a id="ln-137" name="ln-137" href="#ln-137"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int32</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">old_seed</span>
<a id="ln-138" name="ln-138" href="#ln-138"></a>
<a id="ln-139" name="ln-139" href="#ln-139"></a><span class="w"> </span><span class="n">old_seed</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">seed</span>
<a id="ln-140" name="ln-140" href="#ln-140"></a><span class="w"> </span><span class="n">find_seed</span><span class="p">:</span><span class="w"> </span><span class="k">do</span>
<a id="ln-141" name="ln-141" href="#ln-141"></a><span class="k"> call </span><span class="nb">random_number</span><span class="p">(</span><span class="w"> </span><span class="n">sample</span><span class="w"> </span><span class="p">)</span>
<a id="ln-142" name="ln-142" href="#ln-142"></a><span class="w"> </span><span class="n">seed</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">int</span><span class="p">(</span><span class="w"> </span><span class="nb">floor</span><span class="p">(</span><span class="w"> </span><span class="n">sample</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="mi">2_int64</span><span class="o">**</span><span class="mi">32</span><span class="p">,</span><span class="w"> </span><span class="n">int64</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="mi">2_int64</span><span class="o">**</span><span class="mi">31</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-143" name="ln-143" href="#ln-143"></a><span class="w"> </span><span class="n">int32</span><span class="w"> </span><span class="p">)</span>
<a id="ln-144" name="ln-144" href="#ln-144"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="w"> </span><span class="n">seed</span><span class="w"> </span><span class="o">/=</span><span class="w"> </span><span class="n">old_seed</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="k">return</span>
<a id="ln-145" name="ln-145" href="#ln-145"></a><span class="k"> end do </span><span class="n">find_seed</span>
<a id="ln-146" name="ln-146" href="#ln-146"></a>
<a id="ln-147" name="ln-147" href="#ln-147"></a><span class="w"> </span><span class="k">end subroutine </span><span class="n">new_pengy_hash_seed</span>
<a id="ln-148" name="ln-148" href="#ln-148"></a>
<a id="ln-149" name="ln-149" href="#ln-149"></a><span class="k">end submodule </span><span class="n">stdlib_hash_64bit_pengy</span>
</pre></div>
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