153 lines
3.9 KiB
HTML
153 lines
3.9 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<HTML><HEAD><TITLE>Man page of ISWALPHA</TITLE>
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</HEAD><BODY>
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<H1>ISWALPHA</H1>
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Section: Linux Programmer's Manual (3)<BR>Updated: 2015-08-08<BR><A HREF="#index">Index</A>
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<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="lbAB"> </A>
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<H2>NAME</H2>
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iswalpha - test for alphabetic wide character
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<A NAME="lbAC"> </A>
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<H2>SYNOPSIS</H2>
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<PRE>
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<B>#include <<A HREF="file:///usr/include/wctype.h">wctype.h</A>></B>
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<B>int iswalpha(wint_t </B><I>wc</I><B>);</B>
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</PRE>
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<A NAME="lbAD"> </A>
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<H2>DESCRIPTION</H2>
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The
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<B>iswalpha</B>()
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function is the wide-character equivalent of the
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<B><A HREF="/cgi-bin/man/man2html?3+isalpha">isalpha</A></B>(3)
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function.
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It tests whether
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<I>wc</I>
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is a wide character
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belonging to the wide-character class "alpha".
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<P>
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The wide-character class "alpha" is a subclass of the
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wide-character class "alnum",
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and therefore also a subclass of the wide-character class "graph" and
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of the wide-character class "print".
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<P>
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Being a subclass of the wide-character class "print",
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the wide-character class
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"alpha" is disjoint from the wide-character class "cntrl".
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<P>
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Being a subclass of the wide-character class "graph",
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the wide-character class "alpha" is disjoint from
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the wide-character class "space" and its subclass "blank".
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<P>
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Being a subclass of the wide-character class "alnum",
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the wide-character class "alpha" is disjoint from the
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wide-character class "punct".
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<P>
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The wide-character class "alpha" is disjoint from the wide-character class
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"digit".
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<P>
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The wide-character class "alpha" contains the wide-character classes "upper"
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and "lower".
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<P>
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The wide-character class "alpha" always contains at least the
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letters 'A' to 'Z' and 'a' to 'z'.
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<A NAME="lbAE"> </A>
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<H2>RETURN VALUE</H2>
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The
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<B>iswalpha</B>()
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function returns nonzero
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if
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<I>wc</I>
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is a wide character
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belonging to the wide-character class "alpha".
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Otherwise, it returns zero.
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<A NAME="lbAF"> </A>
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<H2>ATTRIBUTES</H2>
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For an explanation of the terms used in this section, see
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<B><A HREF="/cgi-bin/man/man2html?7+attributes">attributes</A></B>(7).
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<TABLE BORDER>
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<TR VALIGN=top><TD><B>Interface</B></TD><TD><B>Attribute</B></TD><TD><B>Value</B><BR></TD></TR>
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<TR VALIGN=top><TD>
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<B>iswalpha</B>()
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</TD><TD>Thread safety</TD><TD>MT-Safe locale<BR></TD></TR>
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</TABLE>
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<A NAME="lbAG"> </A>
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<H2>CONFORMING TO</H2>
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POSIX.1-2001, POSIX.1-2008, C99.
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<A NAME="lbAH"> </A>
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<H2>NOTES</H2>
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The behavior of
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<B>iswalpha</B>()
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depends on the
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<B>LC_CTYPE</B>
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category of the
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current locale.
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<A NAME="lbAI"> </A>
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<H2>SEE ALSO</H2>
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<B><A HREF="/cgi-bin/man/man2html?3+isalpha">isalpha</A></B>(3),
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<B><A HREF="/cgi-bin/man/man2html?3+iswctype">iswctype</A></B>(3)
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<A NAME="lbAJ"> </A>
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<H2>COLOPHON</H2>
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This page is part of release 5.05 of the Linux
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<I>man-pages</I>
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project.
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A description of the project,
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information about reporting bugs,
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and the latest version of this page,
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can be found at
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<A HREF="https://www.kernel.org/doc/man-pages/.">https://www.kernel.org/doc/man-pages/.</A>
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<P>
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<HR>
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<A NAME="index"> </A><H2>Index</H2>
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<DL>
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<DT id="1"><A HREF="#lbAB">NAME</A><DD>
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<DT id="2"><A HREF="#lbAC">SYNOPSIS</A><DD>
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<DT id="3"><A HREF="#lbAD">DESCRIPTION</A><DD>
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<DT id="4"><A HREF="#lbAE">RETURN VALUE</A><DD>
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<DT id="5"><A HREF="#lbAF">ATTRIBUTES</A><DD>
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<DT id="6"><A HREF="#lbAG">CONFORMING TO</A><DD>
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<DT id="7"><A HREF="#lbAH">NOTES</A><DD>
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<DT id="8"><A HREF="#lbAI">SEE ALSO</A><DD>
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<DT id="9"><A HREF="#lbAJ">COLOPHON</A><DD>
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</DL>
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<HR>
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This document was created by
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<A HREF="/cgi-bin/man/man2html">man2html</A>,
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using the manual pages.<BR>
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Time: 00:05:46 GMT, March 31, 2021
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</BODY>
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</HTML>
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