162 lines
6.1 KiB
HTML
162 lines
6.1 KiB
HTML
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<!-- Copyright (c) 2001 The Open Group, All Rights Reserved -->
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<title>remainder</title>
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<body bgcolor="white">
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<script type="text/javascript" language="JavaScript" src="../jscript/codes.js">
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<basefont size="3"> <a name="remainder"></a> <a name="tag_03_604"></a><!-- remainder -->
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<!--header start-->
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<center><font size="2">The Open Group Base Specifications Issue 6<br>
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IEEE Std 1003.1-2001<br>
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Copyright © 2001 The IEEE and The Open Group, All Rights reserved.</font></center>
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<!--header end-->
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<hr size="2" noshade>
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<h4><a name="tag_03_604_01"></a>NAME</h4>
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<blockquote>remainder, remainderf, remainderl - remainder function</blockquote>
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<h4><a name="tag_03_604_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<p><code><tt>#include <<a href="../basedefs/math.h.html">math.h</a>><br>
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<br>
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double remainder(double</tt> <i>x</i><tt>, double</tt> <i>y</i><tt>);<br>
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float remainderf(float</tt> <i>x</i><tt>, float</tt> <i>y</i><tt>);<br>
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long double remainderl(long double</tt> <i>x</i><tt>, long double</tt> <i>y</i><tt>);<br>
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</tt></code></p>
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</blockquote>
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<h4><a name="tag_03_604_03"></a>DESCRIPTION</h4>
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<blockquote>
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<div class="box"><sup>[<a href="javascript:open_code('CX')">CX</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]"
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border="0"> The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the
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requirements described here and the ISO C standard is unintentional. This volume of IEEE Std 1003.1-2001 defers to
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the ISO C standard. <img src="../images/opt-end.gif" alt="[Option End]" border="0"></div>
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<p>These functions shall return the floating-point remainder <i>r</i>= <i>x</i>- <i>ny</i> when <i>y</i> is non-zero. The value
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<i>n</i> is the integral value nearest the exact value <i>x</i>/ <i>y</i>. When |<i>n</i>-<i>x</i>/<i>y</i>|=½, the value
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<i>n</i> is chosen to be even.</p>
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<p>The behavior of <i>remainder</i>() shall be independent of the rounding mode.</p>
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</blockquote>
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<h4><a name="tag_03_604_04"></a>RETURN VALUE</h4>
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<blockquote>
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<p>Upon successful completion, these functions shall return the floating-point remainder <i>r</i>= <i>x</i>- <i>ny</i> when
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<i>y</i> is non-zero.</p>
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<p><sup>[<a href="javascript:open_code('MX')">MX</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]" border="0"> If
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<i>x</i> or <i>y</i> is NaN, a NaN shall be returned.</p>
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<p>If <i>x</i> is infinite or <i>y</i> is 0 and the other is non-NaN, a domain error shall occur, and either a NaN (if supported),
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or an implementation-defined value shall be returned. <img src="../images/opt-end.gif" alt="[Option End]" border="0"></p>
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</blockquote>
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<h4><a name="tag_03_604_05"></a>ERRORS</h4>
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<blockquote>
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<p>These functions shall fail if:</p>
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<dl compact>
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<dt>Domain Error</dt>
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<dd><sup>[<a href="javascript:open_code('MX')">MX</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]" border="0">
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The <i>x</i> argument is ±Inf, or the <i>y</i> argument is ±0 and the other argument is non-NaN.
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<p>If the integer expression (math_errhandling & MATH_ERRNO) is non-zero, then <i>errno</i> shall be set to [EDOM]. If the
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integer expression (math_errhandling & MATH_ERREXCEPT) is non-zero, then the invalid floating-point exception shall be raised.
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<img src="../images/opt-end.gif" alt="[Option End]" border="0"></p>
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</dd>
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</dl>
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</blockquote>
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<hr>
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<div class="box"><em>The following sections are informative.</em></div>
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<h4><a name="tag_03_604_06"></a>EXAMPLES</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_604_07"></a>APPLICATION USAGE</h4>
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<blockquote>
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<p>On error, the expressions (math_errhandling & MATH_ERRNO) and (math_errhandling & MATH_ERREXCEPT) are independent of
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each other, but at least one of them must be non-zero.</p>
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</blockquote>
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<h4><a name="tag_03_604_08"></a>RATIONALE</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_604_09"></a>FUTURE DIRECTIONS</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_604_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="abs.html"><i>abs</i>()</a> , <a href="div.html"><i>div</i>()</a> , <a href=
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"feclearexcept.html"><i>feclearexcept</i>()</a> , <a href="fetestexcept.html"><i>fetestexcept</i>()</a> , <a href=
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"ldiv.html"><i>ldiv</i>()</a> , the Base Definitions volume of IEEE Std 1003.1-2001, <a href=
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"../basedefs/xbd_chap04.html#tag_04_18">Section 4.18, Treatment of Error Conditions for Mathematical Functions</a>, <a href=
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"../basedefs/math.h.html"><i><math.h></i></a></p>
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</blockquote>
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<h4><a name="tag_03_604_11"></a>CHANGE HISTORY</h4>
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<blockquote>
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<p>First released in Issue 4, Version 2.</p>
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</blockquote>
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<h4><a name="tag_03_604_12"></a>Issue 5</h4>
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<blockquote>
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<p>Moved from X/OPEN UNIX extension to BASE.</p>
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</blockquote>
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<h4><a name="tag_03_604_13"></a>Issue 6</h4>
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<blockquote>
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<p>The <i>remainder</i>() function is no longer marked as an extension.</p>
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<p>The <i>remainderf</i>() and <i>remainderl</i>() functions are added for alignment with the ISO/IEC 9899:1999 standard.</p>
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<p>The DESCRIPTION, RETURN VALUE, ERRORS, and APPLICATION USAGE sections are revised to align with the ISO/IEC 9899:1999
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standard.</p>
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<p>IEC 60559:1989 standard floating-point extensions over the ISO/IEC 9899:1999 standard are marked.</p>
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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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