120 lines
4.2 KiB
HTML
120 lines
4.2 KiB
HTML
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<title>feholdexcept</title>
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<basefont size="3"> <a name="feholdexcept"></a> <a name="tag_03_151"></a><!-- feholdexcept -->
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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_151_01"></a>NAME</h4>
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<blockquote>feholdexcept - save current floating-point environment</blockquote>
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<h4><a name="tag_03_151_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 feholdexcept(fenv_t *</tt><i>envp</i><tt>);<br>
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</tt></code></p>
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</blockquote>
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<h4><a name="tag_03_151_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>feholdexcept</i>() function shall save the current floating-point environment in the object pointed to by <i>envp</i>,
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clear the floating-point status flags, and then install a non-stop (continue on floating-point exceptions) mode, if available, for
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all floating-point exceptions.</p>
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</blockquote>
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<h4><a name="tag_03_151_04"></a>RETURN VALUE</h4>
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<blockquote>
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<p>The <i>feholdexcept</i>() function shall return zero if and only if non-stop floating-point exception handling was successfully
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installed.</p>
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</blockquote>
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<h4><a name="tag_03_151_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_151_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_151_07"></a>APPLICATION USAGE</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_151_08"></a>RATIONALE</h4>
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<blockquote>
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<p>The <i>feholdexcept</i>() function should be effective on typical IEC 60559:1989 standard implementations which have the
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default non-stop mode and at least one other mode for trap handling or aborting. If the implementation provides only the non-stop
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mode, then installing the non-stop mode is trivial.</p>
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</blockquote>
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<h4><a name="tag_03_151_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_151_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="fegetenv.html"><i>fegetenv</i>()</a> , <a href="fesetenv.html"><i>fesetenv</i>()</a> , <a href=
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"feupdateenv.html"><i>feupdateenv</i>()</a> , the Base Definitions volume of IEEE Std 1003.1-2001, <a href=
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"../basedefs/fenv.h.html"><i><fenv.h></i></a></p>
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</blockquote>
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<h4><a name="tag_03_151_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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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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UNIX ® is a registered Trademark of The Open Group.<br>
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POSIX ® is a registered Trademark of The IEEE.<br>
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