134 lines
5.1 KiB
HTML
134 lines
5.1 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<!-- Copyright (c) 2001 The Open Group, All Rights Reserved -->
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<title>wctrans</title>
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</head>
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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="wctrans"></a> <a name="tag_03_856"></a><!-- wctrans -->
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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_856_01"></a>NAME</h4>
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<blockquote>wctrans - define character mapping</blockquote>
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<h4><a name="tag_03_856_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<p><code><tt>#include <<a href="../basedefs/wctype.h.html">wctype.h</a>><br>
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<br>
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wctrans_t wctrans(const char *</tt><i>charclass</i><tt>);<br>
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</tt></code></p>
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</blockquote>
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<h4><a name="tag_03_856_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>wctrans</i>() function is defined for valid character mapping names identified in the current locale. The
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<i>charclass</i> is a string identifying a generic character mapping name for which codeset-specific information is required. The
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following character mapping names are defined in all locales: <b>tolower</b> and <b>toupper</b>.</p>
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<p>The function shall return a value of type <b>wctrans_t</b>, which can be used as the second argument to subsequent calls of <a
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href="../functions/towctrans.html"><i>towctrans</i>()</a>. The <i>wctrans</i>() function shall determine values of <b>wctrans_t</b>
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according to the rules of the coded character set defined by character mapping information in the program's locale (category
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<i>LC_CTYPE ).</i> The values returned by <i>wctrans</i>() shall be valid until a call to <a href=
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"../functions/setlocale.html"><i>setlocale</i>()</a> that modifies the category <i>LC_CTYPE .</i></p>
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</blockquote>
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<h4><a name="tag_03_856_04"></a>RETURN VALUE</h4>
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<blockquote>
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<p>The <i>wctrans</i>() function shall return 0 <sup>[<a href="javascript:open_code('CX')">CX</a>]</sup> <img src=
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"../images/opt-start.gif" alt="[Option Start]" border="0"> and may set <i>errno</i> to indicate the error <img src=
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"../images/opt-end.gif" alt="[Option End]" border="0"> if the given character mapping name is not valid for the current
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locale (category <i>LC_CTYPE );</i> otherwise, it shall return a non-zero object of type <b>wctrans_t</b> that can be used in calls
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to <a href="../functions/towctrans.html"><i>towctrans</i>()</a>.</p>
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</blockquote>
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<h4><a name="tag_03_856_05"></a>ERRORS</h4>
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<blockquote>
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<p>The <i>wctrans</i>() function may fail if:</p>
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<dl compact>
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<dt>[EINVAL]</dt>
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<dd><sup>[<a href="javascript:open_code('CX')">CX</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]" border="0">
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The character mapping name pointed to by <i>charclass</i> is not valid in the current locale. <img src="../images/opt-end.gif" alt=
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"[Option End]" border="0"></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_856_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_856_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_856_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_856_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_856_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="towctrans.html"><i>towctrans</i>()</a> , the Base Definitions volume of IEEE Std 1003.1-2001, <a href=
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"../basedefs/wctype.h.html"><i><wctype.h></i></a></p>
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</blockquote>
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<h4><a name="tag_03_856_11"></a>CHANGE HISTORY</h4>
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<blockquote>
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<p>First released in Issue 5. Derived from ISO/IEC 9899:1990/Amendment 1:1995 (E).</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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