getcchar.html

来自「unix 下的C开发手册,还用详细的例程。」· HTML 代码 · 共 71 行

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><!-- Copyright 1997 The Open Group, All Rights Reserved --><title>getcchar</title></head><body bgcolor=white><center><font size=2>The Single UNIX &reg; Specification, Version 2<br>Copyright &copy; 1997 The Open Group</font></center><hr size=2 noshade><h4><a name = "tag_000_000_417">&nbsp;</a>NAME</h4><blockquote>getcchar - get a wide character string and rendition from a <b>cchar_t</b></blockquote><h4><a name = "tag_000_000_418">&nbsp;</a>SYNOPSIS</h4><blockquote><pre><code>#include &lt;<a href="curses.h.html">curses.h</a>&gt;int getcchar(const cchar_t *<i>wcval</i>, wchar_t *<i>wch</i>, attr_t *<i>attrs</i>,             short *<i>color_pair</i>, void *<i>opts</i>);</code></pre></blockquote><h4><a name = "tag_000_000_419">&nbsp;</a>DESCRIPTION</h4><blockquote>When <i>wch</i> is not a null pointer, the<i>getcchar()</i>function extracts information from a <b>cchar_t</b> defined by <i>wcval</i>,stores the character attributes in the object pointed to by <i>attrs</i>,stores the colour pair in the object pointed to by <i>color_pair</i>, andstores the wide character string referenced by <i>wcval</i> into the arraypointed to by <i>wch</i>.<p>When <i>wch</i> is a null pointer,<i>getcchar()</i>obtains the number of wide characters in the object pointed to by <i>wcval</i>and does not change the objects pointed to by <i>attrs</i> or <i>color_pair</i>.<p>The <i>opts</i> argument is reserved for definition in a future edition of thisdocument.  Currently, the application must provide a null pointer as<i>opts</i>.</blockquote><h4><a name = "tag_000_000_420">&nbsp;</a>RETURN VALUE</h4><blockquote>When <i>wch</i> is a null pointer,<i>getcchar()</i>returns the number of wide characters referenced by <i>wcval</i>, including thenull terminator.<p>When <i>wch</i> is not a null pointer,<i>getcchar()</i>returns OK upon successful completion, and ERR otherwise.</blockquote><h4><a name = "tag_000_000_421">&nbsp;</a>ERRORS</h4><blockquote>No errors are defined.</blockquote><h4><a name = "tag_000_000_422">&nbsp;</a>APPLICATION USAGE</h4><blockquote>The <i>wcval</i> argument may be a value generated by a call to<i><a href="setcchar.html">setcchar()</a></i>or by a function that has a <b>cchar_t</b> output argument.  If<i>wcval</i> is constructed by any other means, the effect is unspecified.</blockquote><h4><a name = "tag_000_000_423">&nbsp;</a>SEE ALSO</h4><blockquote><i><a href="attroff.html">attroff()</a></i>,<i><a href="can_change_color.html">can_change_color()</a></i>,<i><a href="setcchar.html">setcchar()</a></i>,<i><a href="curses.h.html">&lt;curses.h&gt;</a></i>.</blockquote><hr size=2 noshade><center><font size=2>UNIX &reg; is a registered Trademark of The Open Group.<br>Copyright &copy; 1997 The Open Group<br> [ <a href="../index.html">Main Index</a> | <a href="../xshix.html">XSH</a> | <a href="../xcuix.html">XCU</a> | <a href="../xbdix.html">XBD</a> | <a href="../cursesix.html">XCURSES</a> | <a href="../xnsix.html">XNS</a> ]</font></center><hr size=2 noshade></body></html>

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