iswalnum manual

iswalnum - test for alphanumeric wide character

The iswalnum() function is the wide-character equivalent of the isal- num(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-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-char- acter 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 nonzero if wc is a wide character belonging to the wide-character class alnum.
Otherwise, it returns zero.

Notes

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

See example

See also

https://github.com/ClnViewer/LibWchar2/blob/master/test/test_iswalnum.c

LibWchar2 information

Version

libwchar2 0.0.10

Date

Wed Aug 22 2018

Author

(c) PS 2018-2018

Manual author and license

Copyright

GNU Public License version 2. Manual license details