51 lines
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51 lines
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<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"/><meta name="viewport" content="width=device-width, initial-scale=0.8"/><title>4.3.5 Extflonums</title><link rel="stylesheet" type="text/css" href="../scribble.css" title="default"/><link rel="stylesheet" type="text/css" href="extras.css" title="default"/><link rel="stylesheet" type="text/css" href="../racket.css" title="default"/><link rel="stylesheet" type="text/css" href="../manual-style.css" title="default"/><link rel="stylesheet" type="text/css" href="../manual-racket.css" title="default"/><link rel="stylesheet" type="text/css" href="../manual-racket.css" title="default"/><link rel="stylesheet" type="text/css" href="../doc-site.css" title="default"/><script type="text/javascript" src="../scribble-common.js"></script><script type="text/javascript" src="../manual-racket.js"></script><script type="text/javascript" src="../manual-racket.js"></script><script type="text/javascript" src="../doc-site.js"></script><script type="text/javascript" src="../local-redirect/local-redirect.js"></script><script type="text/javascript" src="../local-redirect/local-user-redirect.js"></script><!--[if IE 6]><style type="text/css">.SIEHidden { overflow: hidden; }</style><![endif]--></head><body id="doc-racket-lang-org"><div class="tocset"><div class="tocview"><div class="tocviewlist tocviewlisttopspace"><div class="tocviewtitle"><table cellspacing="0" cellpadding="0"><tr><td style="width: 1em;"><a href="javascript:void(0);" title="Expand/Collapse" class="tocviewtoggle" onclick="TocviewToggle(this,"tocview_0");">►</a></td><td></td><td><a href="index.html" class="tocviewlink" data-pltdoc="x">The Racket Reference</a></td></tr></table></div><div class="tocviewsublisttop" style="display: none;" id="tocview_0"><table cellspacing="0" cellpadding="0"><tr><td align="right">1 </td><td><a href="model.html" class="tocviewlink" data-pltdoc="x">Language Model</a></td></tr><tr><td align="right">2 </td><td><a href="notation.html" class="tocviewlink" data-pltdoc="x">Notation for Documentation</a></td></tr><tr><td align="right">3 </td><td><a href="syntax.html" class="tocviewlink" data-pltdoc="x">Syntactic Forms</a></td></tr><tr><td align="right">4 </td><td><a href="data.html" class="tocviewselflink" data-pltdoc="x">Datatypes</a></td></tr><tr><td align="right">5 </td><td><a href="structures.html" class="tocviewlink" data-pltdoc="x">Structures</a></td></tr><tr><td align="right">6 </td><td><a href="mzlib_class.html" class="tocviewlink" data-pltdoc="x">Classes and Objects</a></td></tr><tr><td align="right">7 </td><td><a href="mzlib_unit.html" class="tocviewlink" data-pltdoc="x">Units</a></td></tr><tr><td align="right">8 </td><td><a href="contracts.html" class="tocviewlink" data-pltdoc="x">Contracts</a></td></tr><tr><td align="right">9 </td><td><a href="match.html" class="tocviewlink" data-pltdoc="x">Pattern Matching</a></td></tr><tr><td align="right">10 </td><td><a href="control.html" class="tocviewlink" data-pltdoc="x">Control Flow</a></td></tr><tr><td align="right">11 </td><td><a href="concurrency.html" class="tocviewlink" data-pltdoc="x">Concurrency and Parallelism</a></td></tr><tr><td align="right">12 </td><td><a href="Macros.html" class="tocviewlink" data-pltdoc="x">Macros</a></td></tr><tr><td align="right">13 </td><td><a href="input-and-output.html" class="tocviewlink" data-pltdoc="x">Input and Output</a></td></tr><tr><td align="right">14 </td><td><a href="security.html" class="tocviewlink" data-pltdoc="x">Reflection and Security</a></td></tr><tr><td align="right">15 </td><td><a href="os.html" class="tocviewlink" data-pltdoc="x">Operating System</a></td></tr><tr><td align="right">16 </td><td><a href="memory.html" class="tocviewlink" data-pltdoc="x">Memory Management</a></td></tr><tr><td align="right">17 </td><td><a href="unsafe.html" class="tocviewlink" data-pltdoc="x">Unsafe Operations</a></td></tr><tr><td align="right">18 </td><td><a href="running.html" class="tocvi
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floating-point number. Extflonum arithmetic is supported on
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platforms with extended-precision hardware and where the
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extflonum implementation does not conflict with normal
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double-precision arithmetic (i.e., on x86 and x86_64 platforms when
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Racket is compiled to use SSE instructions for floating-point
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operations, and on Windows when <a name="(idx._(gentag._132._(lib._scribblings/reference/reference..scrbl)))"></a><span class="stt">"longdouble.dll"</span>
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is available).</p><p>A extflonum is <span style="font-weight: bold">not</span> a <a href="numbers.html#%28tech._number%29" class="techoutside" data-pltdoc="x"><span class="techinside">number</span></a> in the sense of
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<span class="RktSym"><a href="number-types.html#%28def._%28%28quote._~23~25kernel%29._number~3f%29%29" class="RktValLink" data-pltdoc="x">number?</a></span>. Only extflonum-specific operations such as
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<span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extfl%2B%29%29" class="RktValLink" data-pltdoc="x">extfl+</a></span> perform extflonum arithmetic.</p><p>A literal extflonum is written like an <a href="numbers.html#%28tech._inexact._number%29" class="techoutside" data-pltdoc="x"><span class="techinside">inexact number</span></a>,
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but using an explicit <span class="RktInBG"><span class="hspace"></span><span class="RktIn">t</span><span class="hspace"></span></span> or <span class="RktInBG"><span class="hspace"></span><span class="RktIn">T</span><span class="hspace"></span></span> exponent marker (see
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<a href="reader.html#%28part._parse-extflonum%29" data-pltdoc="x">Reading Extflonums</a>). For example, <span class="RktVal">3.5t0</span> is an
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extflonum. The extflonum values for infinity are
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<a name="(idx._(gentag._133._(lib._scribblings/reference/reference..scrbl)))"></a><span class="RktVal">+inf.t</span> and <a name="(idx._(gentag._134._(lib._scribblings/reference/reference..scrbl)))"></a><span class="RktVal"><span class="nobreak">-i</span>nf.t</span>. The
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extflonum value for not-a-number is <a name="(idx._(gentag._135._(lib._scribblings/reference/reference..scrbl)))"></a><span class="RktVal">+nan.t</span> or
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<a name="(idx._(gentag._136._(lib._scribblings/reference/reference..scrbl)))"></a><span class="RktVal"><span class="nobreak">-n</span>an.t</span>.</p><p>If <span class="RktPn">(</span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum-available~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum-available?</a></span><span class="RktPn">)</span> produces <span class="RktVal">#f</span>, then all
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operations exported by <a href="extflonums.html" class="RktModLink" data-pltdoc="x"><span class="RktSym">racket/extflonum</span></a> raise
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<span class="RktSym"><a href="exns.html#%28def._%28%28lib._racket%2Fprivate%2Fbase..rkt%29._exn~3afail~3aunsupported%29%29" class="RktValLink" data-pltdoc="x">exn:fail:unsupported</a></span>, except for <span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span>,
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<span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum-available~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum-available?</a></span>, and <span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflvector~3f%29%29" class="RktValLink" data-pltdoc="x">extflvector?</a></span> (which always
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work). The reader (see <a href="reader.html" data-pltdoc="x">The Reader</a>) always accepts extflonum
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input; when extflonum operations are not supported, printing an
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extflonum from the reader uses its source notation (as opposed to
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normalizing the format).</p><p>Two extflonums are <span class="RktSym"><a href="Equality.html#%28def._%28%28quote._~23~25kernel%29._equal~3f%29%29" class="RktValLink" data-pltdoc="x">equal?</a></span> if <span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extfl~3d%29%29" class="RktValLink" data-pltdoc="x">extfl=</a></span>
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produces <span class="RktVal">#t</span> for the extflonums. If extflonums
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are not supported in a platform, extflonums are <span class="RktSym"><a href="Equality.html#%28def._%28%28quote._~23~25kernel%29._equal~3f%29%29" class="RktValLink" data-pltdoc="x">equal?</a></span>
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only if they are <span class="RktSym"><a href="Equality.html#%28def._%28%28quote._~23~25kernel%29._eq~3f%29%29" class="RktValLink" data-pltdoc="x">eq?</a></span>.</p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._extflonum~3f))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValDef RktValLink" data-pltdoc="x">extflonum?</a></span></span><span class="hspace"> </span><span class="RktVar">v</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="booleans.html#%28def._%28%28quote._~23~25kernel%29._boolean~3f%29%29" class="RktValLink" data-pltdoc="x">boolean?</a></span></p></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">v</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="data-structure-contracts.html#%28def._%28%28lib._racket%2Fcontract%2Fprivate%2Fmisc..rkt%29._any%2Fc%29%29" class="RktValLink" data-pltdoc="x">any/c</a></span></td></tr></table></blockquote></div><div class="SIntrapara">Returns <span class="RktVal">#t</span> if <span class="RktVar">v</span> is an extflonum, <span class="RktVal">#f</span>
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otherwise.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._extflonum-available~3f))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum-available~3f%29%29" class="RktValDef RktValLink" data-pltdoc="x">extflonum-available?</a></span></span><span class="RktPn"></span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="booleans.html#%28def._%28%28quote._~23~25kernel%29._boolean~3f%29%29" class="RktValLink" data-pltdoc="x">boolean?</a></span></p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">Returns <span class="RktVal">#t</span> if <a href="extflonums.html#%28tech._extflonum%29" class="techoutside" data-pltdoc="x"><span class="techinside">extflonum</span></a> operations are supported on the
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current platform, <span class="RktVal">#f</span> otherwise.</div></p><h5 x-source-module="(lib "scribblings/reference/reference.scrbl")" x-source-pkg="racket-doc" x-part-tag=""Extflonum_Arithmetic"">4.3.5.1<tt> </tt><a name="(part._.Extflonum_.Arithmetic)"></a>Extflonum Arithmetic</h5><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><table cellspacing="0" cellpadding="0" class="together"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._extfl+))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extfl%2B%29%29" class="RktValDef RktValLink" data-pltdoc="x">extfl+</a></span></span><span class="hspace"> </span><span class="RktVar">a</span><span class="hspace"> </span><span class="RktVar">b</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></p></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">a</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">b</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></td></tr></table></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="together"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._extfl-))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extfl-%29%29" class="RktValDef RktValLink" data-pltdoc="x">extfl-</a></span></span><span class="hspace"> </span><span class="RktVar">a</span><span class="hspace"> </span><span class="RktVar">b</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></p></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">a</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">b</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></td></tr></table></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="together"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._extfl*))"></a><span title="Provided from: racket/extflonum | Package: base"
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but for <a href="extflonums.html#%28tech._extflonum%29" class="techoutside" data-pltdoc="x"><span class="techinside">extflonums</span></a>.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><table cellspacing="0" cellpadding="0" class="together"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._extfl~3d))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extfl~3d%29%29" class="RktValDef RktValLink" data-pltdoc="x">extfl=</a></span></span><span class="hspace"> </span><span class="RktVar">a</span><span class="hspace"> </span><span class="RktVar">b</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="booleans.html#%28def._%28%28quote._~23~25kernel%29._boolean~3f%29%29" class="RktValLink" data-pltdoc="x">boolean?</a></span></p></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">a</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">b</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></td></tr></table></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="together"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._extfl~3c))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extfl~3c%29%29" class="RktValDef RktValLink" data-pltdoc="x">extfl<</a></span></span><span class="hspace"> </span><span class="RktVar">a</span><span class="hspace"> </span><span class="RktVar">b</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="booleans.html#%28def._%28%28quote._~23~25kernel%29._boolean~3f%29%29" class="RktValLink" data-pltdoc="x">boolean?</a></span></p></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">a</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">b</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></td></tr></table></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="together"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._extfl~3e))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extfl~3e%29%29" class="RktValDef RktValLink" data-pltdoc="x">extfl></a></span></span
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<span class="RktSym"><a href="flonums.html#%28def._%28%28lib._racket%2Fflonum..rkt%29._flmin%29%29" class="RktValLink" data-pltdoc="x">flmin</a></span>, and <span class="RktSym"><a href="flonums.html#%28def._%28%28lib._racket%2Fflonum..rkt%29._flmax%29%29" class="RktValLink" data-pltdoc="x">flmax</a></span>, but for <a href="extflonums.html#%28tech._extflonum%29" class="techoutside" data-pltdoc="x"><span class="techinside">extflonums</span></a>.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><table cellspacing="0" cellpadding="0" class="together"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._extflround))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflround%29%29" class="RktValDef RktValLink" data-pltdoc="x">extflround</a></span></span><span class="hspace"> </span><span class="RktVar">a</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></p></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">a</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></td></tr></table></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="together"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._extflfloor))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflfloor%29%29" class="RktValDef RktValLink" data-pltdoc="x">extflfloor</a></span></span><span class="hspace"> </span><span class="RktVar">a</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></p></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">a</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></td></tr></table></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="together"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._extflceiling))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflceiling%29%29" class="RktValDef RktValLink" data-pltdoc="x">extflceiling</a></span></span><span class="hspace"> </span><span class="RktVar">a</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></p></blockquote></td></tr><tr><td><span class="hspace"> </span><s
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<span class="RktSym"><a href="flonums.html#%28def._%28%28lib._racket%2Fflonum..rkt%29._fltruncate%29%29" class="RktValLink" data-pltdoc="x">fltruncate</a></span>, but for <a href="extflonums.html#%28tech._extflonum%29" class="techoutside" data-pltdoc="x"><span class="techinside">extflonums</span></a>.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><table cellspacing="0" cellpadding="0" class="together"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._extflsin))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflsin%29%29" class="RktValDef RktValLink" data-pltdoc="x">extflsin</a></span></span><span class="hspace"> </span><span class="RktVar">a</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></p></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">a</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></td></tr></table></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="together"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._extflcos))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflcos%29%29" class="RktValDef RktValLink" data-pltdoc="x">extflcos</a></span></span><span class="hspace"> </span><span class="RktVar">a</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></p></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">a</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></td></tr></table></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="together"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._extfltan))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extfltan%29%29" class="RktValDef RktValLink" data-pltdoc="x">extfltan</a></span></span><span class="hspace"> </span><span class="RktVar">a</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></p></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">a</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fe
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<span class="RktSym"><a href="flonums.html#%28def._%28%28lib._racket%2Fflonum..rkt%29._flacos%29%29" class="RktValLink" data-pltdoc="x">flacos</a></span>, <span class="RktSym"><a href="flonums.html#%28def._%28%28lib._racket%2Fflonum..rkt%29._flatan%29%29" class="RktValLink" data-pltdoc="x">flatan</a></span>, <span class="RktSym"><a href="flonums.html#%28def._%28%28lib._racket%2Fflonum..rkt%29._fllog%29%29" class="RktValLink" data-pltdoc="x">fllog</a></span>, <span class="RktSym"><a href="flonums.html#%28def._%28%28lib._racket%2Fflonum..rkt%29._flexp%29%29" class="RktValLink" data-pltdoc="x">flexp</a></span>, and
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<span class="RktSym"><a href="flonums.html#%28def._%28%28lib._racket%2Fflonum..rkt%29._flsqrt%29%29" class="RktValLink" data-pltdoc="x">flsqrt</a></span>, and <span class="RktSym"><a href="flonums.html#%28def._%28%28lib._racket%2Fflonum..rkt%29._flexpt%29%29" class="RktValLink" data-pltdoc="x">flexpt</a></span>, but for <a href="extflonums.html#%28tech._extflonum%29" class="techoutside" data-pltdoc="x"><span class="techinside">extflonums</span></a>.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><table cellspacing="0" cellpadding="0" class="together"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._-~3eextfl))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._-~3eextfl%29%29" class="RktValDef RktValLink" data-pltdoc="x"><span class="nobreak">-></span>extfl</a></span></span><span class="hspace"> </span><span class="RktVar">a</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></p></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">a</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="number-types.html#%28def._%28%28quote._~23~25kernel%29._exact-integer~3f%29%29" class="RktValLink" data-pltdoc="x">exact-integer?</a></span></td></tr></table></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="together"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._extfl-~3eexact-integer))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extfl-~3eexact-integer%29%29" class="RktValDef RktValLink" data-pltdoc="x">extfl->exact-integer</a></span></span><span class="hspace"> </span><span class="RktVar">a</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="number-types.html#%28def._%28%28quote._~23~25kernel%29._exact-integer~3f%29%29" class="RktValLink" data-pltdoc="x">exact-integer?</a></span></p></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">a</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></td></tr></table></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="together"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._real-~3eextfl))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._real-~3eextfl%29%29" class="RktValDef RktValLink" data-pltdoc="x">real->extfl</a></span></span><span class="hspace"> </span><span class="RktVar">a</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></p
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<span class="RktSym"><a href="number-types.html#%28def._%28%28quote._~23~25kernel%29._real-~3edouble-flonum%29%29" class="RktValLink" data-pltdoc="x">real->double-flonum</a></span>, <span class="RktSym"><a href="number-types.html#%28def._%28%28quote._~23~25kernel%29._inexact-~3eexact%29%29" class="RktValLink" data-pltdoc="x">inexact->exact</a></span>, <span class="RktSym"><a href="fixnums.html#%28def._%28%28lib._racket%2Ffixnum..rkt%29._fl-~3efx%29%29" class="RktValLink" data-pltdoc="x">fl->fx</a></span>,
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and <span class="RktSym"><a href="fixnums.html#%28def._%28%28lib._racket%2Ffixnum..rkt%29._fx-~3efl%29%29" class="RktValLink" data-pltdoc="x">fx->fl</a></span>, but for <a href="extflonums.html#%28tech._extflonum%29" class="techoutside" data-pltdoc="x"><span class="techinside">extflonums</span></a>.
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The <span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extfl-~3einexact%29%29" class="RktValLink" data-pltdoc="x">extfl->inexact</a></span> function converts a <a href="extflonums.html#%28tech._extflonum%29" class="techoutside" data-pltdoc="x"><span class="techinside">extflonum</span></a> to
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its closest <a href="numbers.html#%28tech._flonum%29" class="techoutside" data-pltdoc="x"><span class="techinside">flonum</span></a> approximation.</div></p><p class="SHistory">Changed in version 7.7.0.8 of package <span class="stt">base</span>: Changed <span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extfl-~3efx%29%29" class="RktValLink" data-pltdoc="x">extfl->fx</a></span> to truncate.</p><h5 x-source-module="(lib "scribblings/reference/reference.scrbl")" x-source-pkg="racket-doc" x-part-tag=""Extflonum_Constants"">4.3.5.2<tt> </tt><a name="(part._.Extflonum_.Constants)"></a>Extflonum Constants</h5><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>value</p></div></div><p class="RForeground"><a name="(def._((lib._racket/extflonum..rkt)._pi..t))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._pi..t%29%29" class="RktValDef RktValLink" data-pltdoc="x">pi.t</a></span></span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">Like <span class="RktSym"><a href="generic-numbers.html#%28def._%28%28lib._racket%2Fmath..rkt%29._pi%29%29" class="RktValLink" data-pltdoc="x">pi</a></span>, but with 80 bits precision.</div></p><h5 x-source-module="(lib "scribblings/reference/reference.scrbl")" x-source-pkg="racket-doc" x-part-tag=""extflvectors"">4.3.5.3<tt> </tt><a name="(part._extflvectors)"></a>Extflonum Vectors</h5><p>An <a name="(tech._extflvector)"></a><span style="font-style: italic">extflvector</span> is like an <a href="flonums.html#%28tech._flvector%29" class="techoutside" data-pltdoc="x"><span class="techinside">flvector</span></a>, but it holds only
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<a href="extflonums.html#%28tech._extflonum%29" class="techoutside" data-pltdoc="x"><span class="techinside">extflonums</span></a>. See also <a href="unsafe.html#%28part._unsafeextfl%29" data-pltdoc="x">Unsafe Extflonum Operations</a>.</p><p>Two <a href="extflonums.html#%28tech._extflvector%29" class="techoutside" data-pltdoc="x"><span class="techinside">extflvectors</span></a> are <span class="RktSym"><a href="Equality.html#%28def._%28%28quote._~23~25kernel%29._equal~3f%29%29" class="RktValLink" data-pltdoc="x">equal?</a></span> if they have the same length,
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and if the values in corresponding slots of the <a href="extflonums.html#%28tech._extflvector%29" class="techoutside" data-pltdoc="x"><span class="techinside">extflvectors</span></a> are
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<span class="RktSym"><a href="Equality.html#%28def._%28%28quote._~23~25kernel%29._equal~3f%29%29" class="RktValLink" data-pltdoc="x">equal?</a></span>.</p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><table cellspacing="0" cellpadding="0" class="together"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._extflvector~3f))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflvector~3f%29%29" class="RktValDef RktValLink" data-pltdoc="x">extflvector?</a></span></span><span class="hspace"> </span><span class="RktVar">v</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="booleans.html#%28def._%28%28quote._~23~25kernel%29._boolean~3f%29%29" class="RktValLink" data-pltdoc="x">boolean?</a></span></p></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">v</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="data-structure-contracts.html#%28def._%28%28lib._racket%2Fcontract%2Fprivate%2Fmisc..rkt%29._any%2Fc%29%29" class="RktValLink" data-pltdoc="x">any/c</a></span></td></tr></table></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="together"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._extflvector))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflvector%29%29" class="RktValDef RktValLink" data-pltdoc="x">extflvector</a></span></span><span class="hspace"> </span><span class="RktVar">x</span><span class="hspace"> </span><span class="RktMeta">...</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflvector~3f%29%29" class="RktValLink" data-pltdoc="x">extflvector?</a></span></p></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">x</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></td></tr></table></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="together"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._make-extflvector))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._make-extflvector%29%29" class="RktValDef RktValLink" data-pltdoc="x">make-extflvector</a></span></span><span class="hspace"> </span><span class="RktVar">size</span><span class="hspace"> </span><span class="RktOpt">[</span><span class="RktVar">x</span><span class="RktOpt">]</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflvector~3f%29%29" class="RktValLink" data-pltdoc="x">extflvector?</a></span></p></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">size</span><span class="hspace"> </span>:<span class
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<span class="RktSym"><a href="flonums.html#%28def._%28%28lib._racket%2Fflonum..rkt%29._flvector-length%29%29" class="RktValLink" data-pltdoc="x">flvector-length</a></span>, <span class="RktSym"><a href="flonums.html#%28def._%28%28lib._racket%2Fflonum..rkt%29._flvector-ref%29%29" class="RktValLink" data-pltdoc="x">flvector-ref</a></span>, <span class="RktSym">flvector-set</span>,
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and <span class="RktSym"><a href="flonums.html#%28def._%28%28lib._racket%2Fflonum..rkt%29._flvector-copy%29%29" class="RktValLink" data-pltdoc="x">flvector-copy</a></span>, but for <a href="extflonums.html#%28tech._extflvector%29" class="techoutside" data-pltdoc="x"><span class="techinside">extflvectors</span></a>.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><table cellspacing="0" cellpadding="0" class="together"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._in-extflvector))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._in-extflvector%29%29" class="RktValDef RktValLink" data-pltdoc="x">in-extflvector</a></span></span><span class="hspace"> </span><span class="RktVar">vec</span><span class="hspace"> </span><span class="RktOpt">[</span><span class="RktVar">start</span><span class="hspace"> </span><span class="RktVar">stop</span><span class="hspace"> </span><span class="RktVar">step</span><span class="RktOpt">]</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="sequences.html#%28def._%28%28lib._racket%2Fprivate%2Fbase..rkt%29._sequence~3f%29%29" class="RktValLink" data-pltdoc="x">sequence?</a></span></p></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">vec</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflvector~3f%29%29" class="RktValLink" data-pltdoc="x">extflvector?</a></span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">start</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="number-types.html#%28def._%28%28quote._~23~25kernel%29._exact-nonnegative-integer~3f%29%29" class="RktValLink" data-pltdoc="x">exact-nonnegative-integer?</a></span><span class="hspace"> </span>=<span class="hspace"> </span><span class="RktVal">0</span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">stop</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="data-structure-contracts.html#%28def._%28%28lib._racket%2Fcontract%2Fbase..rkt%29._or%2Fc%29%29" class="RktValLink" data-pltdoc="x">or/c</a></span><span class="hspace"> </span><span class="RktSym"><a href="number-types.html#%28def._%28%28quote._~23~25kernel%29._exact-integer~3f%29%29" class="RktValLink" data-pltdoc="x">exact-integer?</a></span><span class="hspace"> </span><span class="RktVal">#f</span><span class="RktPn">)</span><span class="hspace"> </span>=<span class="hspace"> </span><span class="RktVal">#f</span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">step</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="data-structure-contracts.html#%28def._%28%28lib._racket%2Fcontract%2Fbase..rkt%29._and%2Fc%29%29" class="RktValLink" data-pltdoc="x">and/c</a></span><span class="hspace"> </span><span class="RktSym"><a href="number-types.html#%28def._%28%28quote._~23~25kernel%29._exact-integer~3f%29%29" class="RktValLink" data-pltdoc="x">exact-integer?</a></span><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="data-structure-contracts.html#%28def._%28%28lib._racket%2Fcontract%2Fprivate%2Fmisc..rkt%29._not%2Fc%29%29" class="RktValLink" data-pltdoc="x">not/c</a></span><span class="hspace"> </span><span class="RktSym"><a href="number-types.html#%28def._%28%28quo
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but for <a href="extflonums.html#%28tech._extflvector%29" class="techoutside" data-pltdoc="x"><span class="techinside">extflvectors</span></a>.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><table cellspacing="0" cellpadding="0" class="together"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._shared-extflvector))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._shared-extflvector%29%29" class="RktValDef RktValLink" data-pltdoc="x">shared-extflvector</a></span></span><span class="hspace"> </span><span class="RktVar">x</span><span class="hspace"> </span><span class="RktMeta">...</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflvector~3f%29%29" class="RktValLink" data-pltdoc="x">extflvector?</a></span></p></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">x</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></td></tr></table></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="together"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._make-shared-extflvector))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._make-shared-extflvector%29%29" class="RktValDef RktValLink" data-pltdoc="x">make-shared-extflvector</a></span></span><span class="hspace"> </span><span class="RktVar">size</span><span class="hspace"> </span><span class="RktOpt">[</span><span class="RktVar">x</span><span class="RktOpt">]</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflvector~3f%29%29" class="RktValLink" data-pltdoc="x">extflvector?</a></span></p></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">size</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="number-types.html#%28def._%28%28quote._~23~25kernel%29._exact-nonnegative-integer~3f%29%29" class="RktValLink" data-pltdoc="x">exact-nonnegative-integer?</a></span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">x</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span><span class="hspace"> </span>=<span class="hspace"> </span><span class="RktVal">0.0t0</span></td></tr></table></td></tr></table></blockquote></div><div class="SIntrapara">Like <span class="RktSym"><a href="flonums.html#%28def._%28%28lib._racket%2Fflonum..rkt%29._shared-flvector%29%29" class="RktValLink" data-pltdoc="x">shared-flvector</a></span> and <span class="RktSym"><a href="flonums.html#%28def._%28%28lib._racket%2Fflonum..rkt%29._make-shared-flvector%29%29" class="RktValLink" data-pltdoc="x">make-shared-flvector</a></span>,
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but for <a href="extflonums.html#%28tech._extflvector%29" class="techoutside" data-pltdoc="x"><span class="techinside">extflvectors</span></a>.</div></p><h5 x-source-module="(lib "scribblings/reference/reference.scrbl")" x-source-pkg="racket-doc" x-part-tag=""extflutils"">4.3.5.4<tt> </tt><a name="(part._extflutils)"></a>Extflonum Byte Strings</h5><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><table cellspacing="0" cellpadding="0" class="prototype RForeground"><tr><td valign="top"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._floating-point-bytes-~3eextfl))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._floating-point-bytes-~3eextfl%29%29" class="RktValDef RktValLink" data-pltdoc="x">floating-point-bytes->extfl</a></span></span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktVar">bstr</span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td></tr><tr><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span><span class="RktOpt">[</span></td><td valign="top"><span class="RktVar">big-endian?</span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td></tr><tr><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktVar">start</span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td></tr><tr><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktVar">end</span><span class="RktOpt">]</span><span class="RktPn">)</span></td><td valign="top"><span class="hspace"> </span></td><td valign="top">→</td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></td></tr></table></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">bstr</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="bytestrings.html#%28def._%28%28quote._~23~25kernel%29._bytes~3f%29%29" class="RktValLink" data-pltdoc="x">bytes?</a></span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">big-endian?</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="data-structure-contracts.html#%28def._%28%28lib._racket%2Fcontract%2Fprivate%2Fmisc..rkt%29._any%2Fc%29%29" class="RktValLink" data-pltdoc="x">any/c</a></span><span class="hspace"> </span>=<span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="generic-numbers.html#%28def._%28%28quote._~23~25kernel%29._system-big-endian~3f%29%29" class="RktValLink" data-pltdoc="x">system-big-endian?</a></span><span class="RktPn">)</span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">start</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="number-types.html#%28def._%28%28quote._~23~25kernel
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Converts the extended-precision floating-point number encoded in
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<span class="RktVar">bstr</span> from position <span class="RktVar">start</span> (inclusive) to <span class="RktVar">end</span>
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(exclusive) to an <a href="extflonums.html#%28tech._extflonum%29" class="techoutside" data-pltdoc="x"><span class="techinside">extflonum</span></a>. The difference between
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<span class="RktVar">start</span> an <span class="RktVar">end</span> must be 10 bytes.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><table cellspacing="0" cellpadding="0" class="prototype RForeground"><tr><td valign="top"><span class="RktPn">(</span><a name="(def._((lib._racket/extflonum..rkt)._extfl-~3efloating-point-bytes))"></a><span title="Provided from: racket/extflonum | Package: base"><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extfl-~3efloating-point-bytes%29%29" class="RktValDef RktValLink" data-pltdoc="x">extfl->floating-point-bytes</a></span></span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktVar">x</span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td></tr><tr><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span><span class="RktOpt">[</span></td><td valign="top"><span class="RktVar">big-endian?</span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td></tr><tr><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktVar">dest-bstr</span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td></tr><tr><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktVar">start</span><span class="RktOpt">]</span><span class="RktPn">)</span></td><td valign="top"><span class="hspace"> </span></td><td valign="top">→</td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktSym"><a href="bytestrings.html#%28def._%28%28quote._~23~25kernel%29._bytes~3f%29%29" class="RktValLink" data-pltdoc="x">bytes?</a></span></td></tr></table></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">x</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="extflonums.html#%28def._%28%28lib._racket%2Fextflonum..rkt%29._extflonum~3f%29%29" class="RktValLink" data-pltdoc="x">extflonum?</a></span></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">big-endian?</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="data-structure-contracts.html#%28def._%28%28lib._racket%2Fcontract%2Fprivate%2Fmisc..rkt%29._any%2Fc%29%29" class="RktValLink" data-pltdoc="x">any/c</a></span><span class="hspace"> </span>=<span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="generic-numbers.html#%28def._%28%28quote._~23~25kernel%29._system-big-endian~3f%29%29" class="RktValLink" data-pltdoc="x">system-big-endian?</a></span><span class="RktPn">)</span></td></tr><tr><td><table cellspacing="0" cellpadding="0" class="argcontract"><tr><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktVar">dest-bstr</span></td><td valign="top"><span class="hspace"> </span></td><td valign="top">:</td><td valign="top"><span class="hspace"> </span></td><td valign="top"><span class="RktPn">(</span><span class="RktSym"><a href="data-structure-contracts.html#%28def._%28%28lib._racket%2Fcontract%2Fbase..rkt%29._and%2Fc%29%29" class="Rkt
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Converts <span class="RktVar">x</span> to its representation in a byte
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string of length 10.</div></p><div class="navsetbottom"><span class="navleft"><form class="searchform"><input class="searchbox" id="searchbox" type="text" tabindex="1" placeholder="...search manuals..." title="Enter a search string to search the manuals" onkeypress="return DoSearchKey(event, this, "8.6", "../");"/></form> <a href="https://docs.racket-lang.org/index.html" title="up to the documentation top" data-pltdoc="x" onclick="return GotoPLTRoot("8.6");">top</a><span class="tocsettoggle"> <a href="javascript:void(0);" title="show/hide table of contents" onclick="TocsetToggle();">contents</a></span></span><span class="navright"> <a href="fixnums.html" title="backward to "4.3.4 Fixnums"" data-pltdoc="x">← prev</a> <a href="numbers.html" title="up to "4.3 Numbers"" data-pltdoc="x">up</a> <a href="strings.html" title="forward to "4.4 Strings"" data-pltdoc="x">next →</a></span> </div></div></div><div id="contextindicator"> </div></body></html>
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