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
() 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 non-zero if wc
is a wide character
belonging to the wide-character class "alnum". Otherwise it
returns zero.
The behaviour of iswalnum
()
depends on the LC_CTYPE category of the current locale.
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