126 lines
4.4 KiB
HTML
126 lines
4.4 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
|
<html>
|
|
<head>
|
|
<meta name="generator" content="HTML Tidy, see www.w3.org">
|
|
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
|
<link type="text/css" rel="stylesheet" href="style.css"><!-- Generated by The Open Group's rhtm tool v1.2.1 -->
|
|
<!-- Copyright (c) 2001 The Open Group, All Rights Reserved -->
|
|
<title>fegetenv</title>
|
|
</head>
|
|
<body bgcolor="white">
|
|
<script type="text/javascript" language="JavaScript" src="../jscript/codes.js">
|
|
</script>
|
|
|
|
<basefont size="3"> <a name="fegetenv"></a> <a name="tag_03_148"></a><!-- fegetenv -->
|
|
<!--header start-->
|
|
<center><font size="2">The Open Group Base Specifications Issue 6<br>
|
|
IEEE Std 1003.1-2001<br>
|
|
Copyright © 2001 The IEEE and The Open Group, All Rights reserved.</font></center>
|
|
|
|
<!--header end-->
|
|
<hr size="2" noshade>
|
|
<h4><a name="tag_03_148_01"></a>NAME</h4>
|
|
|
|
<blockquote>fegetenv, fesetenv - get and set current floating-point environment</blockquote>
|
|
|
|
<h4><a name="tag_03_148_02"></a>SYNOPSIS</h4>
|
|
|
|
<blockquote class="synopsis">
|
|
<p><code><tt>#include <<a href="../basedefs/fenv.h.html">fenv.h</a>><br>
|
|
<br>
|
|
int fegetenv(fenv_t *</tt><i>envp</i><tt>);<br>
|
|
int fesetenv(const fenv_t *</tt><i>envp</i><tt>);<br>
|
|
</tt></code></p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_148_03"></a>DESCRIPTION</h4>
|
|
|
|
<blockquote>
|
|
<div class="box"><sup>[<a href="javascript:open_code('CX')">CX</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]"
|
|
border="0"> The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the
|
|
requirements described here and the ISO C standard is unintentional. This volume of IEEE Std 1003.1-2001 defers to
|
|
the ISO C standard. <img src="../images/opt-end.gif" alt="[Option End]" border="0"></div>
|
|
|
|
<p>The <i>fegetenv</i>() function shall attempt to store the current floating-point environment in the object pointed to by
|
|
<i>envp</i>.</p>
|
|
|
|
<p>The <i>fesetenv</i>() function shall attempt to establish the floating-point environment represented by the object pointed to by
|
|
<i>envp</i>. The argument <i>envp</i> shall point to an object set by a call to <i>fegetenv</i>() or <a href=
|
|
"../functions/feholdexcept.html"><i>feholdexcept</i>()</a>, or equal a floating-point environment macro. The <i>fesetenv</i>()
|
|
function does not raise floating-point exceptions, but only installs the state of the floating-point status flags represented
|
|
through its argument.</p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_148_04"></a>RETURN VALUE</h4>
|
|
|
|
<blockquote>
|
|
<p>If the representation was successfully stored, <i>fegetenv</i>() shall return zero. Otherwise, it shall return a non-zero value.
|
|
If the environment was successfully established, <i>fesetenv</i>() shall return zero. Otherwise, it shall return a non-zero
|
|
value.</p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_148_05"></a>ERRORS</h4>
|
|
|
|
<blockquote>
|
|
<p>No errors are defined.</p>
|
|
</blockquote>
|
|
|
|
<hr>
|
|
<div class="box"><em>The following sections are informative.</em></div>
|
|
|
|
<h4><a name="tag_03_148_06"></a>EXAMPLES</h4>
|
|
|
|
<blockquote>
|
|
<p>None.</p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_148_07"></a>APPLICATION USAGE</h4>
|
|
|
|
<blockquote>
|
|
<p>None.</p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_148_08"></a>RATIONALE</h4>
|
|
|
|
<blockquote>
|
|
<p>None.</p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_148_09"></a>FUTURE DIRECTIONS</h4>
|
|
|
|
<blockquote>
|
|
<p>None.</p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_148_10"></a>SEE ALSO</h4>
|
|
|
|
<blockquote>
|
|
<p><a href="feholdexcept.html"><i>feholdexcept</i>()</a> , <a href="feupdateenv.html"><i>feupdateenv</i>()</a> , the Base
|
|
Definitions volume of IEEE Std 1003.1-2001, <a href="../basedefs/fenv.h.html"><i><fenv.h></i></a></p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_148_11"></a>CHANGE HISTORY</h4>
|
|
|
|
<blockquote>
|
|
<p>First released in Issue 6. Derived from the ISO/IEC 9899:1999 standard.</p>
|
|
|
|
<p>ISO/IEC 9899:1999 standard, Technical Corrigendum No. 1 is incorporated.</p>
|
|
</blockquote>
|
|
|
|
<div class="box"><em>End of informative text.</em></div>
|
|
|
|
<hr>
|
|
<hr size="2" noshade>
|
|
<center><font size="2"><!--footer start-->
|
|
UNIX ® is a registered Trademark of The Open Group.<br>
|
|
POSIX ® is a registered Trademark of The IEEE.<br>
|
|
[ <a href="../mindex.html">Main Index</a> | <a href="../basedefs/contents.html">XBD</a> | <a href=
|
|
"../utilities/contents.html">XCU</a> | <a href="../functions/contents.html">XSH</a> | <a href="../xrat/contents.html">XRAT</a>
|
|
]</font></center>
|
|
|
|
<!--footer end-->
|
|
<hr size="2" noshade>
|
|
</body>
|
|
</html>
|
|
|