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<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="cp">#! Integer kinds to be considered during templating</span>
<a id="ln-2" name="ln-2" href="#ln-2"></a><span class="cp">#:set INT_KINDS = ["int8", "int16", "int32", "int64"]</span>
<a id="ln-3" name="ln-3" href="#ln-3"></a>
<a id="ln-4" name="ln-4" href="#ln-4"></a><span class="k">module </span><span class="n">stdlib_hash_64bit</span>
<a id="ln-5" name="ln-5" href="#ln-5"></a>
<a id="ln-6" name="ln-6" href="#ln-6"></a><span class="w"> </span><span class="k">use</span><span class="p">,</span><span class="w"> </span><span class="k">intrinsic</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">iso_fortran_env</span><span class="p">,</span><span class="w"> </span><span class="k">only</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="p">&</span>
<a id="ln-7" name="ln-7" href="#ln-7"></a><span class="w"> </span><span class="n">character_storage_size</span>
<a id="ln-8" name="ln-8" href="#ln-8"></a>
<a id="ln-9" name="ln-9" href="#ln-9"></a><span class="w"> </span><span class="k">use </span><span class="n">stdlib_kinds</span><span class="p">,</span><span class="w"> </span><span class="k">only</span><span class="p">:</span><span class="w"> </span><span class="p">&</span>
<a id="ln-10" name="ln-10" href="#ln-10"></a><span class="w"> </span><span class="n">dp</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-11" name="ln-11" href="#ln-11"></a><span class="w"> </span><span class="n">int8</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-12" name="ln-12" href="#ln-12"></a><span class="w"> </span><span class="n">int16</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-13" name="ln-13" href="#ln-13"></a><span class="w"> </span><span class="n">int32</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-14" name="ln-14" href="#ln-14"></a><span class="w"> </span><span class="n">int64</span>
<a id="ln-15" name="ln-15" href="#ln-15"></a>
<a id="ln-16" name="ln-16" href="#ln-16"></a><span class="w"> </span><span class="k">implicit none</span>
<a id="ln-17" name="ln-17" href="#ln-17"></a>
<a id="ln-18" name="ln-18" href="#ln-18"></a><span class="k"> private</span>
<a id="ln-19" name="ln-19" href="#ln-19"></a>
<a id="ln-20" name="ln-20" href="#ln-20"></a><span class="k"> </span><span class="kt">integer</span><span class="p">,</span><span class="w"> </span><span class="k">parameter</span><span class="p">,</span><span class="w"> </span><span class="k">public</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="p">&</span>
<a id="ln-21" name="ln-21" href="#ln-21"></a><span class="w"> </span><span class="n">int_hash</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">int64</span>
<a id="ln-22" name="ln-22" href="#ln-22"></a><span class="c">!! The number of bits in the output hash</span>
<a id="ln-23" name="ln-23" href="#ln-23"></a>
<a id="ln-24" name="ln-24" href="#ln-24"></a><span class="c">! The number of bits used by each integer type</span>
<a id="ln-25" name="ln-25" href="#ln-25"></a><span class="w"> </span><span class="kt">integer</span><span class="p">,</span><span class="w"> </span><span class="k">parameter</span><span class="p">,</span><span class="w"> </span><span class="k">public</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="p">&</span>
<a id="ln-26" name="ln-26" href="#ln-26"></a><span class="c">! Should be 8</span>
<a id="ln-27" name="ln-27" href="#ln-27"></a><span class="w"> </span><span class="n">bits_int8</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">bit_size</span><span class="p">(</span><span class="mi">0_int8</span><span class="p">),</span><span class="w"> </span><span class="p">&</span>
<a id="ln-28" name="ln-28" href="#ln-28"></a><span class="c">! Should be 16</span>
<a id="ln-29" name="ln-29" href="#ln-29"></a><span class="w"> </span><span class="n">bits_int16</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">bit_size</span><span class="p">(</span><span class="mi">0_int16</span><span class="p">),</span><span class="w"> </span><span class="p">&</span>
<a id="ln-30" name="ln-30" href="#ln-30"></a><span class="c">! Should be 32</span>
<a id="ln-31" name="ln-31" href="#ln-31"></a><span class="w"> </span><span class="n">bits_int32</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">bit_size</span><span class="p">(</span><span class="mi">0_int32</span><span class="p">),</span><span class="w"> </span><span class="p">&</span>
<a id="ln-32" name="ln-32" href="#ln-32"></a><span class="c">! Should be 64</span>
<a id="ln-33" name="ln-33" href="#ln-33"></a><span class="w"> </span><span class="n">bits_int64</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">bit_size</span><span class="p">(</span><span class="mi">0_int64</span><span class="p">)</span>
<a id="ln-34" name="ln-34" href="#ln-34"></a>
<a id="ln-35" name="ln-35" href="#ln-35"></a><span class="w"> </span><span class="kt">integer</span><span class="p">,</span><span class="w"> </span><span class="k">parameter</span><span class="p">,</span><span class="w"> </span><span class="k">public</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="p">&</span>
<a id="ln-36" name="ln-36" href="#ln-36"></a><span class="c">! Should be 1</span>
<a id="ln-37" name="ln-37" href="#ln-37"></a><span class="w"> </span><span class="n">bytes_int8</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">bits_int8</span><span class="o">/</span><span class="n">bits_int8</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-38" name="ln-38" href="#ln-38"></a><span class="c">! Should be 2</span>
<a id="ln-39" name="ln-39" href="#ln-39"></a><span class="w"> </span><span class="n">bytes_int16</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">bits_int16</span><span class="o">/</span><span class="n">bits_int8</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-40" name="ln-40" href="#ln-40"></a><span class="c">! Should be 4</span>
<a id="ln-41" name="ln-41" href="#ln-41"></a><span class="w"> </span><span class="n">bytes_int32</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">bits_int32</span><span class="o">/</span><span class="n">bits_int8</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-42" name="ln-42" href="#ln-42"></a><span class="c">! Should be 8</span>
<a id="ln-43" name="ln-43" href="#ln-43"></a><span class="w"> </span><span class="n">bytes_int64</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">bits_int64</span><span class="o">/</span><span class="n">bits_int8</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="kt">integer</span><span class="p">,</span><span class="w"> </span><span class="k">parameter</span><span class="p">,</span><span class="w"> </span><span class="k">public</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="p">&</span>
<a id="ln-46" name="ln-46" href="#ln-46"></a><span class="w"> </span><span class="n">bits_char</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">character_storage_size</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-47" name="ln-47" href="#ln-47"></a><span class="w"> </span><span class="n">bytes_char</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">bits_char</span><span class="o">/</span><span class="n">bits_int8</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="c">! Dealing with different endians</span>
<a id="ln-50" name="ln-50" href="#ln-50"></a><span class="w"> </span><span class="kt">logical</span><span class="p">,</span><span class="w"> </span><span class="k">parameter</span><span class="p">,</span><span class="w"> </span><span class="k">public</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="p">&</span>
<a id="ln-51" name="ln-51" href="#ln-51"></a><span class="w"> </span><span class="n">little_endian</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="w"> </span><span class="mi">1</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="mi">1_int8</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">0_int16</span><span class="p">)</span><span class="w"> </span><span class="p">)</span>
<a id="ln-52" name="ln-52" href="#ln-52"></a>
<a id="ln-53" name="ln-53" href="#ln-53"></a><span class="w"> </span><span class="k">public</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="p">&</span>
<a id="ln-54" name="ln-54" href="#ln-54"></a><span class="w"> </span><span class="n">fibonacci_hash</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-55" name="ln-55" href="#ln-55"></a><span class="w"> </span><span class="n">fnv_1_hash</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-56" name="ln-56" href="#ln-56"></a><span class="w"> </span><span class="n">fnv_1a_hash</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-57" name="ln-57" href="#ln-57"></a><span class="w"> </span><span class="n">new_pengy_hash_seed</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-58" name="ln-58" href="#ln-58"></a><span class="w"> </span><span class="n">new_spooky_hash_seed</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-59" name="ln-59" href="#ln-59"></a><span class="w"> </span><span class="n">odd_random_integer</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-60" name="ln-60" href="#ln-60"></a><span class="w"> </span><span class="n">pengy_hash</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-61" name="ln-61" href="#ln-61"></a><span class="w"> </span><span class="n">spooky_hash</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-62" name="ln-62" href="#ln-62"></a><span class="w"> </span><span class="n">spookyhash_128</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-63" name="ln-63" href="#ln-63"></a><span class="w"> </span><span class="n">universal_mult_hash</span>
<a id="ln-64" name="ln-64" href="#ln-64"></a>
<a id="ln-65" name="ln-65" href="#ln-65"></a><span class="c">! pow64_over_phi is the odd number that most closely approximates 2**64/phi,</span>
<a id="ln-66" name="ln-66" href="#ln-66"></a><span class="c">! where phi is the golden ratio 1.618...</span>
<a id="ln-67" name="ln-67" href="#ln-67"></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="k">parameter</span><span class="w"> </span><span class="kd">::</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">pow64_over_phi</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">int</span><span class="p">(</span><span class="n">z</span><span class="s1">'9E3779B97F4A7C15'</span><span class="p">,</span><span class="w"> </span><span class="n">int64</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="kt">integer</span><span class="p">(</span><span class="n">int_hash</span><span class="p">),</span><span class="w"> </span><span class="k">parameter</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="p">&</span>
<a id="ln-71" name="ln-71" href="#ln-71"></a><span class="w"> </span><span class="n">two_32</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">2_int_hash</span><span class="o">**</span><span class="mi">32</span>
<a id="ln-72" name="ln-72" href="#ln-72"></a>
<a id="ln-73" name="ln-73" href="#ln-73"></a><span class="c">! constants used by Bob Jenkins' SpookyHash</span>
<a id="ln-74" name="ln-74" href="#ln-74"></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">parameter</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="p">&</span>
<a id="ln-75" name="ln-75" href="#ln-75"></a><span class="w"> </span><span class="n">sc_numvars</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">12</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">sc_blocksize</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">sc_numvars</span><span class="o">*</span><span class="mi">8</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-77" name="ln-77" href="#ln-77"></a><span class="w"> </span><span class="n">sc_buffsize</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">2</span><span class="o">*</span><span class="n">sc_blocksize</span><span class="p">,</span><span class="w"> </span><span class="p">&</span>
<a id="ln-78" name="ln-78" href="#ln-78"></a><span class="w"> </span><span class="n">sc_constsub</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">int</span><span class="p">(</span><span class="n">z</span><span class="s1">'deadbeef'</span><span class="p">,</span><span class="w"> </span><span class="n">int32</span><span class="p">)</span>
<a id="ln-79" name="ln-79" href="#ln-79"></a><span class="w"> </span><span class="c">! twos complement "deadbeef"</span>
<a id="ln-80" name="ln-80" href="#ln-80"></a>
<a id="ln-81" name="ln-81" href="#ln-81"></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="k">parameter</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="p">&</span>
<a id="ln-82" name="ln-82" href="#ln-82"></a><span class="w"> </span><span class="n">sc_const</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="n">sc_constsub</span><span class="p">,</span><span class="w"> </span><span class="n">sc_constsub</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-83" name="ln-83" href="#ln-83"></a>
<a id="ln-84" name="ln-84" href="#ln-84"></a><span class="w"> </span><span class="k">type</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">spooky_subhash</span>
<a id="ln-85" name="ln-85" href="#ln-85"></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="k">data</span><span class="p">(</span><span class="mi">0</span><span class="p">:</span><span class="mi">2</span><span class="o">*</span><span class="n">sc_blocksize</span><span class="o">-</span><span class="mi">1</span><span class="p">)</span>
<a id="ln-86" name="ln-86" href="#ln-86"></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">state</span><span class="p">(</span><span class="mi">0</span><span class="p">:</span><span class="n">sc_numvars</span><span class="o">-</span><span class="mi">1</span><span class="p">)</span>
<a id="ln-87" name="ln-87" href="#ln-87"></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">length</span>
<a id="ln-88" name="ln-88" href="#ln-88"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int16</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">remainder</span>
<a id="ln-89" name="ln-89" href="#ln-89"></a><span class="w"> </span><span class="k">end type </span><span class="n">spooky_subhash</span>
<a id="ln-90" name="ln-90" href="#ln-90"></a>
<a id="ln-91" name="ln-91" href="#ln-91"></a><span class="w"> </span><span class="k">interface </span><span class="n">fnv_1_hash</span>
<a id="ln-92" name="ln-92" href="#ln-92"></a><span class="c">!! Version: experimental</span>
<a id="ln-93" name="ln-93" href="#ln-93"></a><span class="c">!!</span>
<a id="ln-94" name="ln-94" href="#ln-94"></a><span class="c">!! FNV_1 interfaces</span>
<a id="ln-95" name="ln-95" href="#ln-95"></a><span class="c">!! ([Specification](../page/specs/stdlib_hash_procedures.html#fnv_1-calculates-a-hash-code-from-a-key))</span>
<a id="ln-96" name="ln-96" href="#ln-96"></a><span class="w"> </span><span class="err">#</span><span class="p">:</span><span class="n">for</span><span class="w"> </span><span class="n">k1</span><span class="w"> </span><span class="n">in</span><span class="w"> </span><span class="n">INT_KINDS</span>
<a id="ln-97" name="ln-97" href="#ln-97"></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">fnv_1</span><span class="p">(</span><span class="w"> </span><span class="n">key</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-98" name="ln-98" href="#ln-98"></a><span class="c">!! FNV_1 hash function for rank 1 arrays of kind ${k1}$</span>
<a id="ln-99" name="ln-99" href="#ln-99"></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-100" name="ln-100" href="#ln-100"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int_hash</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-101" name="ln-101" href="#ln-101"></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">fnv_1</span>
<a id="ln-102" name="ln-102" href="#ln-102"></a><span class="w"> </span><span class="err">#</span><span class="p">:</span><span class="n">endfor</span>
<a id="ln-103" name="ln-103" href="#ln-103"></a>
<a id="ln-104" name="ln-104" href="#ln-104"></a><span class="w"> </span><span class="k">elemental module function </span><span class="n">character_fnv_1</span><span class="p">(</span><span class="w"> </span><span class="n">key</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-105" name="ln-105" href="#ln-105"></a><span class="c">!! FNV_1 hash function for character strings</span>
<a id="ln-106" name="ln-106" href="#ln-106"></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-107" name="ln-107" href="#ln-107"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int_hash</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-108" name="ln-108" href="#ln-108"></a><span class="w"> </span><span class="k">end function </span><span class="n">character_fnv_1</span>
<a id="ln-109" name="ln-109" href="#ln-109"></a>
<a id="ln-110" name="ln-110" href="#ln-110"></a><span class="w"> </span><span class="k">end interface </span><span class="n">fnv_1_hash</span>
<a id="ln-111" name="ln-111" href="#ln-111"></a>
<a id="ln-112" name="ln-112" href="#ln-112"></a>
<a id="ln-113" name="ln-113" href="#ln-113"></a><span class="w"> </span><span class="k">interface </span><span class="n">fnv_1a_hash</span>
<a id="ln-114" name="ln-114" href="#ln-114"></a><span class="c">!! Version: experimental</span>
<a id="ln-115" name="ln-115" href="#ln-115"></a><span class="c">!!</span>
<a id="ln-116" name="ln-116" href="#ln-116"></a><span class="c">!! FNV_1A interfaces</span>
<a id="ln-117" name="ln-117" href="#ln-117"></a><span class="c">!! ([Specification](../page/specs/stdlib_hash_procedures.html#fnv_1a-calculates-a-hash-code-from-a-key))</span>
<a id="ln-118" name="ln-118" href="#ln-118"></a><span class="w"> </span><span class="err">#</span><span class="p">:</span><span class="n">for</span><span class="w"> </span><span class="n">k1</span><span class="w"> </span><span class="n">in</span><span class="w"> </span><span class="n">INT_KINDS</span>
<a id="ln-119" name="ln-119" href="#ln-119"></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">fnv_1a</span><span class="p">(</span><span class="w"> </span><span class="n">key</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-120" name="ln-120" href="#ln-120"></a><span class="c">!! FNV_1A hash function for rank 1 arrays of kind ${k1}$</span>
<a id="ln-121" name="ln-121" href="#ln-121"></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-122" name="ln-122" href="#ln-122"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int_hash</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-123" name="ln-123" href="#ln-123"></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">fnv_1a</span>
<a id="ln-124" name="ln-124" href="#ln-124"></a><span class="w"> </span><span class="err">#</span><span class="p">:</span><span class="n">endfor</span>
<a id="ln-125" name="ln-125" href="#ln-125"></a>
<a id="ln-126" name="ln-126" href="#ln-126"></a><span class="w"> </span><span class="k">elemental module function </span><span class="n">character_fnv_1a</span><span class="p">(</span><span class="w"> </span><span class="n">key</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-127" name="ln-127" href="#ln-127"></a><span class="c">!! FNV_1A hash function for character strings</span>
<a id="ln-128" name="ln-128" href="#ln-128"></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-129" name="ln-129" href="#ln-129"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int_hash</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-130" name="ln-130" href="#ln-130"></a><span class="w"> </span><span class="k">end function </span><span class="n">character_fnv_1a</span>
<a id="ln-131" name="ln-131" href="#ln-131"></a>
<a id="ln-132" name="ln-132" href="#ln-132"></a><span class="w"> </span><span class="k">end interface </span><span class="n">fnv_1a_hash</span>
<a id="ln-133" name="ln-133" href="#ln-133"></a>
<a id="ln-134" name="ln-134" href="#ln-134"></a><span class="w"> </span><span class="k">interface </span><span class="n">spooky_hash</span>
<a id="ln-135" name="ln-135" href="#ln-135"></a><span class="c">!! Version: experimental</span>
<a id="ln-136" name="ln-136" href="#ln-136"></a><span class="c">!!</span>
<a id="ln-137" name="ln-137" href="#ln-137"></a><span class="c">!! SPOOKY_HASH interfaces</span>
<a id="ln-138" name="ln-138" href="#ln-138"></a><span class="c">!!([Specification](../page/specs/stdlib_hash_procedures.html#spooky_hash-maps-a-character-string-or-integer-vector-to-an-integer))</span>
<a id="ln-139" name="ln-139" href="#ln-139"></a><span class="w"> </span><span class="err">#</span><span class="p">:</span><span class="n">for</span><span class="w"> </span><span class="n">k1</span><span class="w"> </span><span class="n">in</span><span class="w"> </span><span class="n">INT_KINDS</span>
<a id="ln-140" name="ln-140" href="#ln-140"></a><span class="w"> </span><span class="k">module function</span><span class="w"> </span><span class="err">${</span><span class="n">k1</span><span class="err">}$_</span><span class="n">spooky_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-141" name="ln-141" href="#ln-141"></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-142" name="ln-142" href="#ln-142"></a><span class="c">!! SPOOKY HASH function for rank 1 arrays of kind ${k1}$</span>
<a id="ln-143" name="ln-143" href="#ln-143"></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><span class="mi">0</span><span class="p">:)</span>
<a id="ln-144" name="ln-144" href="#ln-144"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int_hash</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><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
<a id="ln-145" name="ln-145" href="#ln-145"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int_hash</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">hash_code</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
<a id="ln-146" name="ln-146" href="#ln-146"></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">spooky_hash</span>
<a id="ln-147" name="ln-147" href="#ln-147"></a><span class="w"> </span><span class="err">#</span><span class="p">:</span><span class="n">endfor</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="w"> </span><span class="k">module function </span><span class="n">character_spooky_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-150" name="ln-150" href="#ln-150"></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-151" name="ln-151" href="#ln-151"></a><span class="c">!! SPOOKY hash function for character strings</span>
<a id="ln-152" name="ln-152" href="#ln-152"></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-153" name="ln-153" href="#ln-153"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int_hash</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><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
<a id="ln-154" name="ln-154" href="#ln-154"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int_hash</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">hash_code</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
<a id="ln-155" name="ln-155" href="#ln-155"></a><span class="w"> </span><span class="k">end function </span><span class="n">character_spooky_hash</span>
<a id="ln-156" name="ln-156" href="#ln-156"></a>
<a id="ln-157" name="ln-157" href="#ln-157"></a><span class="w"> </span><span class="k">end interface </span><span class="n">spooky_hash</span>
<a id="ln-158" name="ln-158" href="#ln-158"></a>
<a id="ln-159" name="ln-159" href="#ln-159"></a><span class="w"> </span><span class="k">interface</span>
<a id="ln-160" name="ln-160" href="#ln-160"></a>
<a id="ln-161" name="ln-161" href="#ln-161"></a><span class="k"> module subroutine </span><span class="n">spookyHash_128</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">hash_inout</span><span class="w"> </span><span class="p">)</span>
<a id="ln-162" name="ln-162" href="#ln-162"></a><span class="c">!! Version: experimental</span>
<a id="ln-163" name="ln-163" href="#ln-163"></a><span class="c">!!</span>
<a id="ln-164" name="ln-164" href="#ln-164"></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="k">target</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-165" name="ln-165" href="#ln-165"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int_hash</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">hash_inout</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
<a id="ln-166" name="ln-166" href="#ln-166"></a><span class="w"> </span><span class="k">end subroutine </span><span class="n">spookyHash_128</span>
<a id="ln-167" name="ln-167" href="#ln-167"></a>
<a id="ln-168" name="ln-168" href="#ln-168"></a><span class="w"> </span><span class="k">end interface</span>
<a id="ln-169" name="ln-169" href="#ln-169"></a>
<a id="ln-170" name="ln-170" href="#ln-170"></a>
<a id="ln-171" name="ln-171" href="#ln-171"></a><span class="k"> interface </span><span class="n">spooky_init</span>
<a id="ln-172" name="ln-172" href="#ln-172"></a><span class="c">!! Version: experimental</span>
<a id="ln-173" name="ln-173" href="#ln-173"></a><span class="c">!!</span>
<a id="ln-174" name="ln-174" href="#ln-174"></a>
<a id="ln-175" name="ln-175" href="#ln-175"></a><span class="w"> </span><span class="k">pure module subroutine </span><span class="n">spookysubhash_init</span><span class="p">(</span><span class="w"> </span><span class="n">self</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-176" name="ln-176" href="#ln-176"></a><span class="w"> </span><span class="k">type</span><span class="p">(</span><span class="n">spooky_subhash</span><span class="p">),</span><span class="w"> </span><span class="k">intent</span><span class="p">(</span><span class="n">out</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">self</span>
<a id="ln-177" name="ln-177" href="#ln-177"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int_hash</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><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
<a id="ln-178" name="ln-178" href="#ln-178"></a><span class="w"> </span><span class="k">end subroutine </span><span class="n">spookysubhash_init</span>
<a id="ln-179" name="ln-179" href="#ln-179"></a>
<a id="ln-180" name="ln-180" href="#ln-180"></a><span class="w"> </span><span class="k">end interface </span><span class="n">spooky_init</span>
<a id="ln-181" name="ln-181" href="#ln-181"></a>
<a id="ln-182" name="ln-182" href="#ln-182"></a>
<a id="ln-183" name="ln-183" href="#ln-183"></a><span class="w"> </span><span class="k">interface </span><span class="n">spooky_update</span>
<a id="ln-184" name="ln-184" href="#ln-184"></a>
<a id="ln-185" name="ln-185" href="#ln-185"></a><span class="w"> </span><span class="k">module subroutine </span><span class="n">spookyhash_update</span><span class="p">(</span><span class="w"> </span><span class="n">spooky</span><span class="p">,</span><span class="w"> </span><span class="n">key</span><span class="w"> </span><span class="p">)</span>
<a id="ln-186" name="ln-186" href="#ln-186"></a><span class="c">!! Version: experimental</span>
<a id="ln-187" name="ln-187" href="#ln-187"></a><span class="c">!!</span>
<a id="ln-188" name="ln-188" href="#ln-188"></a><span class="w"> </span><span class="k">type</span><span class="p">(</span><span class="n">spooky_subhash</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">spooky</span>
<a id="ln-189" name="ln-189" href="#ln-189"></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-190" name="ln-190" href="#ln-190"></a><span class="w"> </span><span class="k">end subroutine </span><span class="n">spookyhash_update</span>
<a id="ln-191" name="ln-191" href="#ln-191"></a>
<a id="ln-192" name="ln-192" href="#ln-192"></a><span class="w"> </span><span class="k">end interface </span><span class="n">spooky_update</span>
<a id="ln-193" name="ln-193" href="#ln-193"></a>
<a id="ln-194" name="ln-194" href="#ln-194"></a>
<a id="ln-195" name="ln-195" href="#ln-195"></a><span class="w"> </span><span class="k">interface </span><span class="n">spooky_final</span>
<a id="ln-196" name="ln-196" href="#ln-196"></a>
<a id="ln-197" name="ln-197" href="#ln-197"></a><span class="w"> </span><span class="k">module subroutine </span><span class="n">spookyhash_final</span><span class="p">(</span><span class="n">spooky</span><span class="p">,</span><span class="w"> </span><span class="n">hash_code</span><span class="p">)</span>
<a id="ln-198" name="ln-198" href="#ln-198"></a><span class="c">!! Version: experimental</span>
<a id="ln-199" name="ln-199" href="#ln-199"></a><span class="c">!!</span>
<a id="ln-200" name="ln-200" href="#ln-200"></a><span class="w"> </span><span class="k">type</span><span class="p">(</span><span class="n">spooky_subhash</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">spooky</span>
<a id="ln-201" name="ln-201" href="#ln-201"></a><span class="w"> </span><span class="kt">integer</span><span class="p">(</span><span class="n">int_hash</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">hash_code</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
<a id="ln-202" name="ln-202" href="#ln-202"></a><span class="w"> </span><span class="k">end subroutine </span><span class="n">spookyhash_final</span>
<a id="ln-203" name="ln-203" href="#ln-203"></a>
<a id="ln-204" name="ln-204" href="#ln-204"></a><span class="w"> </span><span class="k">end interface </span><span class="n">spooky_final</span>
<a id="ln-205" name="ln-205" href="#ln-205"></a>
<a id="ln-206" name="ln-206" href="#ln-206"></a><span class="k">interface</span>
<a id="ln-207" name="ln-207" href="#ln-207"></a>
<a id="ln-208" name="ln-208" href="#ln-208"></a><span class="k"> module subroutine </span><span class="n">new_spooky_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-209" name="ln-209" href="#ln-209"></a><span class="c">!! Version: experimental</span>
<a id="ln-210" name="ln-210" href="#ln-210"></a><span class="c">!!</span>
<a id="ln-211" name="ln-211" href="#ln-211"></a><span class="c">!! Random seed generator for SPOOKY_HASH</span>
<a id="ln-212" name="ln-212" href="#ln-212"></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="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><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
<a id="ln-213" name="ln-213" href="#ln-213"></a><span class="w"> </span><span class="k">end subroutine </span><span class="n">new_spooky_hash_seed</span>
<a id="ln-214" name="ln-214" href="#ln-214"></a>
<a id="ln-215" name="ln-215" href="#ln-215"></a><span class="w"> </span><span class="k">end interface</span>
<a id="ln-216" name="ln-216" href="#ln-216"></a>
<a id="ln-217" name="ln-217" href="#ln-217"></a><span class="k"> interface </span><span class="n">pengy_hash</span>
<a id="ln-218" name="ln-218" href="#ln-218"></a><span class="c">!! Version: experimental</span>
<a id="ln-219" name="ln-219" href="#ln-219"></a><span class="c">!!</span>
<a id="ln-220" name="ln-220" href="#ln-220"></a><span class="c">!! PENGY_HASH interfaces</span>
<a id="ln-221" name="ln-221" href="#ln-221"></a><span class="c">!! ([Specification](../page/specs/stdlib_hash_procedures.html#pengy_hash-maps-a-character-string-or-integer-vector-to-an-integer))</span>
<a id="ln-222" name="ln-222" href="#ln-222"></a><span class="w"> </span><span class="err">#</span><span class="p">:</span><span class="n">for</span><span class="w"> </span><span class="n">k1</span><span class="w"> </span><span class="n">in</span><span class="w"> </span><span class="n">INT_KINDS</span>
<a id="ln-223" name="ln-223" href="#ln-223"></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-224" name="ln-224" href="#ln-224"></a><span class="c">!! PENGY_HASH hash function for rank 1 array keys of kind ${k1}$</span>
<a id="ln-225" name="ln-225" href="#ln-225"></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-226" name="ln-226" href="#ln-226"></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-227" name="ln-227" href="#ln-227"></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-228" name="ln-228" href="#ln-228"></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-229" name="ln-229" href="#ln-229"></a><span class="w"> </span><span class="err">#</span><span class="p">:</span><span class="n">endfor</span>
<a id="ln-230" name="ln-230" href="#ln-230"></a>
<a id="ln-231" name="ln-231" href="#ln-231"></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-232" name="ln-232" href="#ln-232"></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-233" name="ln-233" href="#ln-233"></a><span class="c">!! MIR HASH STRICT function for character strings</span>
<a id="ln-234" name="ln-234" href="#ln-234"></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-235" name="ln-235" href="#ln-235"></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-236" name="ln-236" href="#ln-236"></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-237" name="ln-237" href="#ln-237"></a><span class="w"> </span><span class="k">end function </span><span class="n">character_pengy_hash</span>
<a id="ln-238" name="ln-238" href="#ln-238"></a>
<a id="ln-239" name="ln-239" href="#ln-239"></a><span class="w"> </span><span class="k">end interface </span><span class="n">pengy_hash</span>
<a id="ln-240" name="ln-240" href="#ln-240"></a>
<a id="ln-241" name="ln-241" href="#ln-241"></a><span class="w"> </span><span class="k">interface</span>
<a id="ln-242" name="ln-242" href="#ln-242"></a>
<a id="ln-243" name="ln-243" href="#ln-243"></a><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-244" name="ln-244" href="#ln-244"></a><span class="c">!! Version: experimental</span>
<a id="ln-245" name="ln-245" href="#ln-245"></a><span class="c">!!</span>
<a id="ln-246" name="ln-246" href="#ln-246"></a><span class="c">!! Random seed generator for MIR_HASH_STRICT</span>
<a id="ln-247" name="ln-247" href="#ln-247"></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-248" name="ln-248" href="#ln-248"></a><span class="w"> </span><span class="k">end subroutine </span><span class="n">new_pengy_hash_seed</span>
<a id="ln-249" name="ln-249" href="#ln-249"></a>
<a id="ln-250" name="ln-250" href="#ln-250"></a><span class="w"> </span><span class="k">end interface</span>
<a id="ln-251" name="ln-251" href="#ln-251"></a>
<a id="ln-252" name="ln-252" href="#ln-252"></a><span class="k">contains</span>
<a id="ln-253" name="ln-253" href="#ln-253"></a>
<a id="ln-254" name="ln-254" href="#ln-254"></a><span class="k"> elemental function </span><span class="n">fibonacci_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">nbits</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="k">result</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-255" name="ln-255" href="#ln-255"></a><span class="c">!! Version: experimental</span>
<a id="ln-256" name="ln-256" href="#ln-256"></a><span class="c">!!</span>
<a id="ln-257" name="ln-257" href="#ln-257"></a><span class="c">!! Maps the 64 bit integer `key` to an unsigned integer value with only `nbits`</span>
<a id="ln-258" name="ln-258" href="#ln-258"></a><span class="c">!! bits where `nbits` is less than 64</span>
<a id="ln-259" name="ln-259" href="#ln-259"></a><span class="c">!! ([Specification](../page/specs/stdlib_hash_procedures.html#fibonacci_hash-maps-an-integer-to-a-smaller-number-of-bits_1))</span>
<a id="ln-260" name="ln-260" href="#ln-260"></a>
<a id="ln-261" name="ln-261" href="#ln-261"></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="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-262" name="ln-262" href="#ln-262"></a><span class="w"> </span><span class="kt">integer</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">nbits</span>
<a id="ln-263" name="ln-263" href="#ln-263"></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">sample</span>
<a id="ln-264" name="ln-264" href="#ln-264"></a>
<a id="ln-265" name="ln-265" href="#ln-265"></a><span class="w"> </span><span class="n">sample</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">ishft</span><span class="p">(</span><span class="w"> </span><span class="n">key</span><span class="o">*</span><span class="n">pow64_over_phi</span><span class="p">,</span><span class="w"> </span><span class="o">-</span><span class="mi">64</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">nbits</span><span class="w"> </span><span class="p">)</span>
<a id="ln-266" name="ln-266" href="#ln-266"></a>
<a id="ln-267" name="ln-267" href="#ln-267"></a><span class="w"> </span><span class="k">end function </span><span class="n">fibonacci_hash</span>
<a id="ln-268" name="ln-268" href="#ln-268"></a>
<a id="ln-269" name="ln-269" href="#ln-269"></a><span class="w"> </span><span class="k">elemental function </span><span class="n">universal_mult_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="p">,</span><span class="w"> </span><span class="n">nbits</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="k">result</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-270" name="ln-270" href="#ln-270"></a><span class="c">!! Version: experimental</span>
<a id="ln-271" name="ln-271" href="#ln-271"></a><span class="c">!!</span>
<a id="ln-272" name="ln-272" href="#ln-272"></a><span class="c">!! Uses the "random" odd 64 bit integer `seed` to map the 64 bit integer `key` to</span>
<a id="ln-273" name="ln-273" href="#ln-273"></a><span class="c">!! an unsigned integer value with only `nbits` bits where `nbits` is less than 64.</span>
<a id="ln-274" name="ln-274" href="#ln-274"></a><span class="c">!! ([Specification](../page/specs/stdlib_hash_procedures.html#universal_mult_hash-maps-an-integer-to-a-smaller-number-of-bits_1))</span>
<a id="ln-275" name="ln-275" href="#ln-275"></a>
<a id="ln-276" name="ln-276" href="#ln-276"></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="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-277" name="ln-277" href="#ln-277"></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="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-278" name="ln-278" href="#ln-278"></a><span class="w"> </span><span class="kt">integer</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">nbits</span>
<a id="ln-279" name="ln-279" href="#ln-279"></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">sample</span>
<a id="ln-280" name="ln-280" href="#ln-280"></a>
<a id="ln-281" name="ln-281" href="#ln-281"></a><span class="w"> </span><span class="n">sample</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">ishft</span><span class="p">(</span><span class="w"> </span><span class="n">key</span><span class="o">*</span><span class="n">seed</span><span class="p">,</span><span class="w"> </span><span class="o">-</span><span class="mi">64</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">nbits</span><span class="w"> </span><span class="p">)</span>
<a id="ln-282" name="ln-282" href="#ln-282"></a>
<a id="ln-283" name="ln-283" href="#ln-283"></a><span class="w"> </span><span class="k">end function </span><span class="n">universal_mult_hash</span>
<a id="ln-284" name="ln-284" href="#ln-284"></a>
<a id="ln-285" name="ln-285" href="#ln-285"></a><span class="w"> </span><span class="k">subroutine </span><span class="n">odd_random_integer</span><span class="p">(</span><span class="w"> </span><span class="n">harvest</span><span class="w"> </span><span class="p">)</span>
<a id="ln-286" name="ln-286" href="#ln-286"></a><span class="c">!! Version: experimental</span>
<a id="ln-287" name="ln-287" href="#ln-287"></a><span class="c">!!</span>
<a id="ln-288" name="ln-288" href="#ln-288"></a><span class="c">!! Returns a 64 bit pseudo random integer, `harvest`, distributed uniformly over</span>
<a id="ln-289" name="ln-289" href="#ln-289"></a><span class="c">!! the odd integers of the 64 bit kind.</span>
<a id="ln-290" name="ln-290" href="#ln-290"></a><span class="c">!! ([Specification](../page/specs/stdlib_hash_procedures.html#odd_random_integer-returns-odd-integer))</span>
<a id="ln-291" name="ln-291" href="#ln-291"></a>
<a id="ln-292" name="ln-292" href="#ln-292"></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="k">intent</span><span class="p">(</span><span class="n">out</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">harvest</span>
<a id="ln-293" name="ln-293" href="#ln-293"></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><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
<a id="ln-294" name="ln-294" href="#ln-294"></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">part</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
<a id="ln-295" name="ln-295" href="#ln-295"></a>
<a id="ln-296" name="ln-296" href="#ln-296"></a><span class="w"> </span><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-297" name="ln-297" href="#ln-297"></a><span class="w"> </span><span class="n">part</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="n">int32</span><span class="w"> </span><span class="p">)</span>
<a id="ln-298" name="ln-298" href="#ln-298"></a><span class="w"> </span><span class="n">harvest</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">part</span><span class="p">,</span><span class="w"> </span><span class="n">harvest</span><span class="w"> </span><span class="p">)</span>
<a id="ln-299" name="ln-299" href="#ln-299"></a><span class="w"> </span><span class="n">harvest</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">ishft</span><span class="p">(</span><span class="w"> </span><span class="n">harvest</span><span class="p">,</span><span class="w"> </span><span class="mi">1</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="mi">1_int64</span>
<a id="ln-300" name="ln-300" href="#ln-300"></a>
<a id="ln-301" name="ln-301" href="#ln-301"></a><span class="w"> </span><span class="k">end subroutine </span><span class="n">odd_random_integer</span>
<a id="ln-302" name="ln-302" href="#ln-302"></a>
<a id="ln-303" name="ln-303" href="#ln-303"></a><span class="w"> </span><span class="k">subroutine </span><span class="n">random_integer</span><span class="p">(</span><span class="w"> </span><span class="n">harvest</span><span class="w"> </span><span class="p">)</span>
<a id="ln-304" name="ln-304" href="#ln-304"></a><span class="c">!! Version: experimental</span>
<a id="ln-305" name="ln-305" href="#ln-305"></a><span class="c">!!</span>
<a id="ln-306" name="ln-306" href="#ln-306"></a><span class="c">!! Returns a 64 bit pseudo random integer, `harvest`, distributed uniformly over</span>
<a id="ln-307" name="ln-307" href="#ln-307"></a><span class="c">!! the values of the 64 bit kind.</span>
<a id="ln-308" name="ln-308" href="#ln-308"></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="k">intent</span><span class="p">(</span><span class="n">out</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">harvest</span>
<a id="ln-309" name="ln-309" href="#ln-309"></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><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
<a id="ln-310" name="ln-310" href="#ln-310"></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">part</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span>
<a id="ln-311" name="ln-311" href="#ln-311"></a>
<a id="ln-312" name="ln-312" href="#ln-312"></a><span class="w"> </span><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-313" name="ln-313" href="#ln-313"></a><span class="w"> </span><span class="n">part</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="n">int32</span><span class="w"> </span><span class="p">)</span>
<a id="ln-314" name="ln-314" href="#ln-314"></a><span class="w"> </span><span class="n">harvest</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">part</span><span class="p">,</span><span class="w"> </span><span class="n">harvest</span><span class="w"> </span><span class="p">)</span>
<a id="ln-315" name="ln-315" href="#ln-315"></a>
<a id="ln-316" name="ln-316" href="#ln-316"></a><span class="w"> </span><span class="k">end subroutine </span><span class="n">random_integer</span>
<a id="ln-317" name="ln-317" href="#ln-317"></a>
<a id="ln-318" name="ln-318" href="#ln-318"></a><span class="k">end module </span><span class="n">stdlib_hash_64bit</span>
</pre></div>
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