iswdigit manual

iswdigit - test for decimal digit wide character

The iswdigit() function is the wide-character equivalent of the isdigit(3) function. It tests whether wc is a wide character belonging to the wide-character class digit.

The wide-character class digit is a subclass of the wide-character class xdigit, and therefore also a subclass of the wide-character class alnum, of the wide-character class graph and of the wide- character class print.

Being a subclass of the wide character class print, the wide-charac- ter class digit is disjoint from the wide-character class cntrl.

Being a subclass of the wide-character class graph, the wide-charac- ter class digit is disjoint from the wide-character class space and its subclass blank.

Being a subclass of the wide-character class alnum, the wide-charac- ter class digit is disjoint from the wide-character class punct.

The wide-character class digit is disjoint from the wide-character class alpha and therefore also disjoint from its subclasses lower, upper.

The wide-character class digit always contains exactly the digits 0 to 9.

Return Value

The iswdigit() function returns nonzero if wc is a wide character belonging to the wide-character class digit.
Otherwise, it returns zero.

Notes

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

See example

See also

https://github.com/ClnViewer/LibWchar2/blob/master/test/test_iswdigit.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