Section (3) iswalnum
Name
iswalnum — test for alphanumeric wide character
Synopsis
#include <wctype.h>
int
iswalnum( |
wint_t wc) ; |
DESCRIPTION
The iswalnum
() function is
the wide-character equivalent of the isalnum(3) function. It
tests whether wc
is a
wide character belonging to the wide-character class
alnum.
The wide-character class alnum is a subclass of the wide-character class graph, and therefore also a subclass of the wide-character class print.
Being a subclass of the wide-character class print, the wide-character class alnum is disjoint from the wide-character class cntrl.
Being a subclass of the wide-character class graph, the wide-character class alnum is disjoint from the wide-character class space and its subclass blank.
The wide-character class alnum is disjoint from the wide-character class punct.
The wide-character class alnum is the union of the wide-character classes alpha and digit. As such, it also contains the wide-character class xdigit.
The wide-character class alnum always contains at least the letters _zsingle_quotesz_A_zsingle_quotesz_ to _zsingle_quotesz_Z_zsingle_quotesz_, _zsingle_quotesz_a_zsingle_quotesz_ to _zsingle_quotesz_z_zsingle_quotesz_ and the digits _zsingle_quotesz_0_zsingle_quotesz_ to _zsingle_quotesz_9_zsingle_quotesz_.
RETURN VALUE
The iswalnum
() function
returns nonzero if wc
is a wide character belonging to the wide-character class
alnum. Otherwise, it returns zero.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
Interface | Attribute | Value |
iswalnum () |
Thread safety | MT-Safe locale |
COLOPHON
This page is part of release 4.16 of the Linux man-pages
project. A
description of the project, information about reporting bugs,
and the latest version of this page, can be found at
https://www.kernel.org/doc/man−pages/.
Copyright (c) Bruno Haible <haibleclisp.cons.org> %%%LICENSE_START(GPLv2+_DOC_ONEPARA) This is free documentation; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. %%%LICENSE_END References consulted: GNU glibc-2 source code and manual Dinkumware C library reference http://www.dinkumware.com/ OpenGroup_zsingle_quotesz_s Single UNIX specification http://www.UNIX-systems.org/online.html ISO/IEC 9899:1999 |