Query: iswdigit
OS: plan9
Section: 3
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ISWDIGIT(3) Linux Programmer's Manual ISWDIGIT(3)NAMEiswdigit - test for decimal digit wide characterSYNOPSIS#include <wctype.h> int iswdigit(wint_t wc);DESCRIPTIONThe 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-character class "digit" is disjoint from the wide-character class "cntrl". Being a subclass of the wide-character class "graph", the wide-character 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-character 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 VALUEThe iswdigit() function returns nonzero if wc is a wide character belonging to the wide-character class "digit". Otherwise, it returns zero.ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7). +-----------+---------------+----------------+ |Interface | Attribute | Value | +-----------+---------------+----------------+ |iswdigit() | Thread safety | MT-Safe locale | +-----------+---------------+----------------+CONFORMING TOPOSIX.1-2001, POSIX.1-2008, C99.NOTESThe behavior of iswdigit() depends on the LC_CTYPE category of the current locale.SEE ALSOisdigit(3), iswctype(3)COLOPHONThis page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.GNU2015-08-08 ISWDIGIT(3)