124 lines
4.7 KiB
HTML
124 lines
4.7 KiB
HTML
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<title>feraiseexcept</title>
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<basefont size="3"> <a name="feraiseexcept"></a> <a name="tag_03_153"></a><!-- feraiseexcept -->
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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_153_01"></a>NAME</h4>
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<blockquote>feraiseexcept - raise floating-point exception</blockquote>
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<h4><a name="tag_03_153_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<p><code><tt>#include <<a href="../basedefs/fenv.h.html">fenv.h</a>><br>
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<br>
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int feraiseexcept(int</tt> <i>excepts</i><tt>);<br>
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</tt></code></p>
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</blockquote>
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<h4><a name="tag_03_153_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>The <i>feraiseexcept</i>() function shall attempt to raise the supported floating-point exceptions represented by the argument
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<i>excepts</i>. The order in which these floating-point exceptions are raised is unspecified. Whether the <i>feraiseexcept</i>()
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function additionally raises the inexact floating-point exception whenever it raises the overflow or underflow floating-point
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exception is implementation-defined.</p>
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</blockquote>
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<h4><a name="tag_03_153_04"></a>RETURN VALUE</h4>
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<blockquote>
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<p>If the argument is zero or if all the specified exceptions were successfully raised, <i>feraiseexcept</i>() shall return zero.
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Otherwise, it shall return a non-zero value.</p>
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</blockquote>
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<h4><a name="tag_03_153_05"></a>ERRORS</h4>
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<blockquote>
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<p>No errors are defined.</p>
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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_153_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_153_07"></a>APPLICATION USAGE</h4>
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<blockquote>
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<p>The effect is intended to be similar to that of floating-point exceptions raised by arithmetic operations. Hence, enabled traps
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for floating-point exceptions raised by this function are taken.</p>
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</blockquote>
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<h4><a name="tag_03_153_08"></a>RATIONALE</h4>
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<blockquote>
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<p>Raising overflow or underflow is allowed to also raise inexact because on some architectures the only practical way to raise an
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exception is to execute an instruction that has the exception as a side effect. The function is not restricted to accept only valid
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coincident expressions for atomic operations, so the function can be used to raise exceptions accrued over several operations.</p>
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</blockquote>
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<h4><a name="tag_03_153_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_153_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="feclearexcept.html"><i>feclearexcept</i>()</a> , <a href="fegetexceptflag.html"><i>fegetexceptflag</i>()</a> , <a href=
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"fesetexceptflag.html"><i>fesetexceptflag</i>()</a> , <a href="fetestexcept.html"><i>fetestexcept</i>()</a> , the Base Definitions
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volume of IEEE Std 1003.1-2001, <a href="../basedefs/fenv.h.html"><i><fenv.h></i></a></p>
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</blockquote>
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<h4><a name="tag_03_153_11"></a>CHANGE HISTORY</h4>
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<blockquote>
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<p>First released in Issue 6. Derived from the ISO/IEC 9899:1999 standard.</p>
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<p>ISO/IEC 9899:1999 standard, Technical Corrigendum No. 1 is incorporated.</p>
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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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