Section (3) iswdigit
Name
iswdigit — test for decimal digit wide character
Synopsis
#include <wctype.h>
int
iswdigit( |
wint_t wc) ; |
DESCRIPTION
The iswdigit
() function is
the wide-character equivalent of the isdigit(3) function. It
tests whether wc
is a
wide character belonging to the wide-character class
digit.
The wide-character class digit is a subclass of the wide-character class xdigit, and therefore also a subclass of the wide-character class alnum, of the wide-character class graph and of the wide-character class print.
Being a subclass of the wide character class print, the wide-character class digit is disjoint from the wide-character class cntrl.
Being a subclass of the wide-character class graph, the wide-character class digit is disjoint from the wide-character class space and its subclass blank.
Being a subclass of the wide-character class alnum, the wide-character class digit is disjoint from the wide-character class punct.
The wide-character class digit is disjoint from the wide-character class alpha and therefore also disjoint from its subclasses lower, upper.
The wide-character class digit always contains exactly the digits _zsingle_quotesz_0_zsingle_quotesz_ to _zsingle_quotesz_9_zsingle_quotesz_.
RETURN VALUE
The iswdigit
() function
returns nonzero if wc
is a wide character belonging to the wide-character class
digit. Otherwise, it returns zero.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
Interface | Attribute | Value |
iswdigit () |
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 |