Manpage of ISWALNUM

ISWALNUM

Section: Linux Programmer's Manual (3)
Updated: 2015-08-08
Index
 

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 wcis 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 aqAaq to aqZaq, aqaaq to aqzaq and the digits aq0aq to aq9aq.  

RETURN VALUE

The iswalnum() function returns nonzero if wcis 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).
InterfaceAttributeValue
iswalnum() Thread safetyMT-Safe locale
 

CONFORMING TO

POSIX.1-2001, POSIX.1-2008, C99.  

NOTES

The behavior of iswalnum() depends on the LC_CTYPEcategory of the current locale.  

SEE ALSO

isalnum(3), iswctype(3)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ATTRIBUTES
CONFORMING TO
NOTES
SEE ALSO

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