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<body id="ddoc_main" class="ddoc dlang">
<div class="content_wrapper">
<article class="module">
<h1 class="module_name">sfmt</h1>
<section id="module_content"><section class="section ddoc_sections">
<div class="ddoc_summary">
<p class="para">
Main API of SIMD-oriented Fast Mersenne Twister (SFMT).
</p>
</div>
</section>
<section class="section ddoc_module_members_section">
<div class="ddoc_module_members">
<ul class="ddoc_members">
<li class="ddoc_member">
<div class="ddoc_member_header">
<div class="ddoc_header_anchor">
<a href="#RunTimeSFMT" id="RunTimeSFMT"><code class="code">RunTimeSFMT</code></a>
</div>
</div><div class="ddoc_decl">
<section class="section">
<div class="declaration">
<h4>Declaration</h4>
<div class="dlang">
<p class="para">
<code class="code">
<span class="ddoc_anchor" id="RunTimeSFMT"></span>struct <code class="code">RunTimeSFMT</code>;
</code>
</p>
</div>
</div>
</section>
</div>
<div class="ddoc_decl">
<section class="section ddoc_sections">
<div class="ddoc_summary">
<p class="para">
SFMT random number generator, whose parameters are set run time.
</p>
</div>
</section>
<ul class="ddoc_members">
<li class="ddoc_member">
<div class="ddoc_member_header">
<div class="ddoc_header_anchor">
<a href="#RunTimeSFMT.this" id="RunTimeSFMT.this"><code class="code">this</code></a>
</div>
</div><div class="ddoc_decl">
<section class="section">
<div class="declaration">
<h4>Declaration</h4>
<div class="dlang">
<p class="para">
<code class="code">
<span class="ddoc_anchor" id="RunTimeSFMT.this"></span>this(in sfmt.internal.Parameters <code class="code">parameters</code>);
</code>
</p>
</div>
</div>
</section>
</div>
<div class="ddoc_decl">
<section class="section ddoc_sections">
<div class="ddoc_summary">
<p class="para">
Set <code class="code">parameters</code> and seed with <code class="code">std.random.unpredictableSeed</code>.
</p>
</div>
</section>
</div>
</li><li class="ddoc_member">
<div class="ddoc_member_header">
<div class="ddoc_header_anchor">
<a href="#RunTimeSFMT.this" id="RunTimeSFMT.this"><code class="code">this</code></a>
</div>
</div><div class="ddoc_decl">
<section class="section">
<div class="declaration">
<h4>Declaration</h4>
<div class="dlang">
<p class="para">
<code class="code">
<span class="ddoc_anchor" id="RunTimeSFMT.this.2"></span>this(in sfmt.internal.Parameters <code class="code">parameters</code>, in uint <code class="code">seed</code>);
<br>
this(in sfmt.internal.Parameters <code class="code">parameters</code>, uint[] <code class="code">seed</code>);
</code>
</p>
</div>
</div>
</section>
</div>
<div class="ddoc_decl">
<section class="section ddoc_sections">
<div class="ddoc_summary">
<p class="para">
Set <code class="code">parameters</code> and seed with specified <code class="code">seed</code>.
</p>
</div>
</section>
</div>
</li><li class="ddoc_member">
<div class="ddoc_member_header">
<div class="ddoc_header_anchor">
<a href="#RunTimeSFMT.setParameters" id="RunTimeSFMT.setParameters"><code class="code">setParameters</code></a>
</div>
</div><div class="ddoc_decl">
<section class="section">
<div class="declaration">
<h4>Declaration</h4>
<div class="dlang">
<p class="para">
<code class="code">
<span class="ddoc_anchor" id="RunTimeSFMT.setParameters"></span>void <code class="code">setParameters</code>(in sfmt.internal.Parameters <code class="code">parameters</code>);
</code>
</p>
</div>
</div>
</section>
</div>
<div class="ddoc_decl">
<section class="section ddoc_sections">
<div class="ddoc_summary">
<p class="para">
Set <code class="code">parameters</code>.
</p>
</div>
<div class="ddoc_description">
<h4>Discussion</h4>
<p class="para">
The internal state is undefined after the call: call <code class="code">seed()</code>.
</p>
</div>
</section>
</div>
</li><li class="ddoc_member">
<div class="ddoc_member_header">
<div class="ddoc_header_anchor">
<a href="#RunTimeSFMT.mexp" id="RunTimeSFMT.mexp"><code class="code">mexp</code></a>
</div>
</div><div class="ddoc_decl">
<section class="section">
<div class="declaration">
<h4>Declaration</h4>
<div class="dlang">
<p class="para">
<code class="code">
<span class="ddoc_anchor" id="RunTimeSFMT.mexp"></span>const @property size_t <code class="code">mexp</code>();
<br>
@property size_t <code class="code">mexp</code>(in size_t <code class="code">value</code>);
</code>
</p>
</div>
</div>
</section>
</div>
<div class="ddoc_decl">
<section class="section ddoc_sections">
<div class="ddoc_summary">
<p class="para">
Mersenne exponent.
</p>
</div>
</section>
</div>
</li><li class="ddoc_member">
<div class="ddoc_member_header">
<div class="ddoc_header_anchor">
<a href="#RunTimeSFMT.m" id="RunTimeSFMT.m"><code class="code">m</code></a>
</div>
</div><div class="ddoc_decl">
<section class="section">
<div class="declaration">
<h4>Declaration</h4>
<div class="dlang">
<p class="para">
<code class="code">
<span class="ddoc_anchor" id="RunTimeSFMT.m"></span>size_t <code class="code">m</code>;
</code>
</p>
</div>
</div>
</section>
</div>
<div class="ddoc_decl">
</div>
</li><li class="ddoc_member">
<div class="ddoc_member_header">
<div class="ddoc_header_anchor">
<a href="#RunTimeSFMT.id" id="RunTimeSFMT.id"><code class="code">id</code></a>
</div>
</div><div class="ddoc_decl">
<section class="section">
<div class="declaration">
<h4>Declaration</h4>
<div class="dlang">
<p class="para">
<code class="code">
<span class="ddoc_anchor" id="RunTimeSFMT.id"></span>const string <code class="code">id</code>();
</code>
</p>
</div>
</div>
</section>
</div>
<div class="ddoc_decl">
</div>
</li>
</ul>
</div>
</li><li class="ddoc_member">
<div class="ddoc_member_header">
<div class="ddoc_header_anchor">
<a href="#rtSFMTs" id="rtSFMTs"><code class="code">rtSFMTs</code></a>
</div>
</div><div class="ddoc_decl">
<section class="section">
<div class="declaration">
<h4>Declaration</h4>
<div class="dlang">
<p class="para">
<code class="code">
<span class="ddoc_anchor" id="rtSFMTs"></span>RunTimeSFMT[] <code class="code">rtSFMTs</code>;
</code>
</p>
</div>
</div>
</section>
</div>
<div class="ddoc_decl">
<section class="section ddoc_sections">
<div class="ddoc_summary">
<p class="para">
<code class="code">RunTimeSFMT</code> generators with predefined variation of parameters.
</p>
</div>
<div class="ddoc_examples">
<h4>Examples</h4>
<p class="para">
<section class="code_listing">
<div class="code_sample">
<div class="dlang">
<ol class="code_lines">
<li><code class="code"><span class="keyword">assert</span> (<span class="psymbol">rtSFMTs</span>.length == 192);
</code></li>
</ol>
</div>
</div>
</section>
</p>
</div>
</section>
</div>
</li><li class="ddoc_member">
<div class="ddoc_member_header">
<div class="ddoc_header_anchor">
<a href="#SFMT" id="SFMT"><code class="code">SFMT</code></a>
</div>
</div><div class="ddoc_decl">
<section class="section">
<div class="declaration">
<h4>Declaration</h4>
<div class="dlang">
<p class="para">
<code class="code">
<span class="ddoc_anchor" id="SFMT"></span>struct <code class="code">SFMT</code>(sfmt.internal.Parameters parameters);
</code>
</p>
</div>
</div>
</section>
</div>
<div class="ddoc_decl">
<section class="section ddoc_sections">
<div class="ddoc_summary">
<p class="para">
SFMT random number generator, whose parameters are set compile time.
</p>
</div>
<div class="ddoc_examples">
<h4>Examples</h4>
<p class="para">
<section class="code_listing">
<div class="code_sample">
<div class="dlang">
<ol class="code_lines">
<li><code class="code"><span class="comment">/// SFMT19937 is an alias of SFMT!(...).
</span><span class="keyword">import</span> std.random;
<span class="keyword">static</span> <span class="keyword">assert</span> (isUniformRNG!SFMT19937);
<span class="keyword">assert</span> (SFMT19937(4321u).front == 16924766246869039260UL);
</code></li>
</ol>
</div>
</div>
</section>
</p>
</div><div class="ddoc_examples">
<h4>Examples</h4>
<p class="para">
<section class="code_listing">
<div class="code_sample">
<div class="dlang">
<ol class="code_lines">
<li><code class="code"><span class="keyword">import</span> std.algorithm : equal;
<span class="keyword">import</span> std.range : take;
<span class="keyword">assert</span> (SFMT19937(4321u).next!(<span class="keyword">ulong</span>[])(1000).equal(
SFMT19937(4321u).take(1000)));
stderr.writeln(<span class="string_literal">"checked next!ulong[] and range functionality"</span>);
</code></li>
</ol>
</div>
</div>
</section>
</p>
</div><div class="ddoc_examples">
<h4>Examples</h4>
<p class="para">
<section class="code_listing">
<div class="code_sample">
<div class="dlang">
<ol class="code_lines">
<li><code class="code"><span class="keyword">import</span> std.random;
<span class="keyword">auto</span> sfmt = SFMT19937(4321u);
<span class="keyword">foreach</span> (i; 0..1000)
{
<span class="keyword">assert</span> (0 <= sfmt.uniform01!<span class="keyword">real</span>);
<span class="keyword">assert</span> (0 <= sfmt.uniform01!<span class="keyword">double</span>);
<span class="keyword">assert</span> (0 <= sfmt.uniform01!<span class="keyword">float</span>);
<span class="keyword">assert</span> (sfmt.uniform01!<span class="keyword">real</span> < 1);
<span class="keyword">assert</span> (sfmt.uniform01!<span class="keyword">double</span> < 1);
<span class="keyword">assert</span> (sfmt.uniform01!<span class="keyword">float</span> < 1);
}
stderr.writeln(<span class="string_literal">"checked uniform01"</span>);
<span class="keyword">auto</span> sixThousandth = sfmt.front;
sfmt = SFMT19937(4321u);
<span class="keyword">foreach</span> (i; 0..6000)
sfmt.popFront;
<span class="keyword">assert</span> (sfmt.front == sixThousandth);
stderr.writeln(<span class="string_literal">"checked call-only-popFront case"</span>);
</code></li>
</ol>
</div>
</div>
</section>
</p>
</div><div class="ddoc_examples">
<h4>Examples</h4>
<p class="para">
<section class="code_listing">
<div class="code_sample">
<div class="dlang">
<ol class="code_lines">
<li><code class="code"><span class="keyword">void</span> testNext(U, ISFMT)(ISFMT sfmt)
{
<span class="keyword">auto</span> copy = sfmt;
<span class="keyword">auto</span> firstBlock = sfmt.next!(U[])(10000);
<span class="keyword">auto</span> secondBlock = sfmt.next!(U[])(10000);
U s;
<span class="keyword">foreach</span> (i, b; firstBlock)
<span class="keyword">assert</span> (b == (s = copy.frontPop!U), <span class="string_literal">"mismatch: first[%d] = %0*,8x != %0*,8x"</span>.format(i, U.sizeof>>1, b, U.sizeof>>1, s));
<span class="keyword">foreach</span> (i, b; secondBlock)
<span class="keyword">assert</span> (b == (s = copy.frontPop!U), <span class="string_literal">"mismatch: second[%d;%d] = %0*,8x != %0*,8x"</span>.format(i, i+firstBlock.length, U.sizeof>>1, b, U.sizeof>>1, s));
}
testNext!<span class="keyword">ulong</span>(SFMT19937(4321u));
testNext!<span class="keyword">ulong</span>(SFMT19937([<span class="keyword">uint</span>(5), 4, 3, 2, 1]));
testNext!<span class="keyword">uint</span>(SFMT19937(1234u));
testNext!<span class="keyword">uint</span>(SFMT19937([<span class="keyword">uint</span>(0x1234), 0x5678, 0x9abc, 0xdef0]));
stderr.writeln(<span class="string_literal">"checked frontPop!U and next!U[] (U = ulong, uint)"</span>);
</code></li>
</ol>
</div>
</div>
</section>
</p>
</div><div class="ddoc_examples">
<h4>Examples</h4>
<p class="para">
<section class="code_listing">
<div class="code_sample">
<div class="dlang">
<ol class="code_lines">
<li><code class="code"><span class="keyword">void</span> testPopFrontThenBlock(size_t firstSize, size_t secondSize)
{
<span class="keyword">import</span> std.range : drop, take;
<span class="keyword">import</span> std.algorithm : equal;
<span class="keyword">auto</span> sfmt = SFMT19937(4321u);
<span class="keyword">foreach</span> (i; 0..firstSize*2)
sfmt.popFront;
<span class="keyword">auto</span> a = sfmt.next!(<span class="keyword">ulong</span>[])(secondSize*2);
<span class="keyword">auto</span> b = SFMT19937(4321u).drop(firstSize*2).take(secondSize*2);
<span class="keyword">assert</span> (a.equal(b));
}
<span class="keyword">foreach</span> (i; 0..SFMT19937.n)
<span class="keyword">foreach</span> (j; SFMT19937.n..SFMT19937.n*2)
{
testPopFrontThenBlock(i, j);
}
stderr.writeln(<span class="string_literal">"checked next!U[]"</span>);
</code></li>
</ol>
</div>
</div>
</section>
</p>
</div>
</section>
<ul class="ddoc_members">
<li class="ddoc_member">
<div class="ddoc_member_header">
<div class="ddoc_header_anchor">
<a href="#SFMT.this" id="SFMT.this"><code class="code">this</code></a>
</div>
</div><div class="ddoc_decl">
<section class="section">
<div class="declaration">
<h4>Declaration</h4>
<div class="dlang">
<p class="para">
<code class="code">
<span class="ddoc_anchor" id="SFMT.this"></span>this(uint <code class="code">seed</code>);
</code>
</p>
</div>
</div>
</section>
</div>
<div class="ddoc_decl">
</div>
</li><li class="ddoc_member">
<div class="ddoc_member_header">
<div class="ddoc_header_anchor">
<a href="#SFMT.this" id="SFMT.this"><code class="code">this</code></a>
</div>
</div><div class="ddoc_decl">
<section class="section">
<div class="declaration">
<h4>Declaration</h4>
<div class="dlang">
<p class="para">
<code class="code">
<span class="ddoc_anchor" id="SFMT.this.2"></span>this(uint[] <code class="code">seed</code>);
</code>
</p>
</div>
</div>
</section>
</div>
<div class="ddoc_decl">
</div>
</li><li class="ddoc_member">
<div class="ddoc_member_header">
<div class="ddoc_header_anchor">
<a href="#SFMT.mersenneExponent" id="SFMT.mersenneExponent"><code class="code">mersenneExponent</code></a>
</div>
</div><div class="ddoc_decl">
<section class="section">
<div class="declaration">
<h4>Declaration</h4>
<div class="dlang">
<p class="para">
<code class="code">
<span class="ddoc_anchor" id="SFMT.mersenneExponent"></span>enum auto <code class="code">mersenneExponent</code>;
</code>
</p>
</div>
</div>
</section>
</div>
<div class="ddoc_decl">
</div>
</li><li class="ddoc_member">
<div class="ddoc_member_header">
<div class="ddoc_header_anchor">
<a href="#SFMT.mexp" id="SFMT.mexp"><code class="code">mexp</code></a>
</div>
</div><div class="ddoc_decl">
<section class="section">
<div class="declaration">
<h4>Declaration</h4>