iswalnum - test for alphanumeric wide character
#include <wctype.h>
int iswalnum(wint_t wc);
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
'A' to 'Z', 'a' to 'z' and the digits '0' to '9'.
The
iswalnum() function returns nonzero if
wc is a wide character
belonging to the wide-character class "alnum". Otherwise, it returns
zero.
For an explanation of the terms used in this section, see
attributes(7).
Interface |
Attribute |
Value |
iswalnum () |
Thread safety |
MT-Safe locale |
POSIX.1-2001, POSIX.1-2008, C99.
The behavior of
iswalnum() depends on the
LC_CTYPE category of the
current locale.
isalnum(3),
iswctype(3)