ISWALNUM(3) Linux Programmer's Manual ISWALNUM(3)NAMEiswalnum - 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 isal‐
num() 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 charac‐
ter class "alnum" is disjoint from the wide character class "cntrl".
Being a subclass of the wide character class "graph", the wide charac‐
ter 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 charac‐
ter class "xdigit".
The wide character class "alnum" always contains at least the letters
'A' to 'Z', 'a' to 'z' and the digits '0' to '9'.
RETURN VALUE
The iswalnum() function returns non-zero if wc is a wide character
belonging to the wide character class "alnum". Otherwise it returns
zero.
CONFORMING TO
C99.
SEE ALSOisalnum(3), iswctype(3)NOTES
The behaviour of iswalnum() depends on the LC_CTYPE category of the
current locale.
GNU 1999-07-25 ISWALNUM(3)
