|
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON |
ISWDIGIT(3) Linux Programmer's Manual ISWDIGIT(3)
iswdigit - test for decimal digit wide character
#include <wctype.h>
int iswdigit(wint_t wc);
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-
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'.
The iswdigit() function returns nonzero if wc is a wide character
belonging to the wide-character class "digit". Otherwise, it returns
zero.
For an explanation of the terms used in this section, see
attributes(7).
┌───────────┬───────────────┬────────────────┐
│Interface │ Attribute │ Value │
├───────────┼───────────────┼────────────────┤
│iswdigit() │ Thread safety │ MT-Safe locale │
└───────────┴───────────────┴────────────────┘
POSIX.1-2001, POSIX.1-2008, C99.
The behavior of iswdigit() depends on the LC_CTYPE category of the
current locale.
isdigit(3), iswctype(3)
This page is part of release 5.08 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/.
GNU 2015-08-08 ISWDIGIT(3)
Pages that refer to this page: isalnum(3) , isalnum_l(3) , isalpha(3) , isalpha_l(3) , isascii(3) , isascii_l(3) , isblank(3) , isblank_l(3) , iscntrl(3) , iscntrl_l(3) , isdigit(3) , isdigit_l(3) , isgraph(3) , isgraph_l(3) , islower(3) , islower_l(3) , isprint(3) , isprint_l(3) , ispunct(3) , ispunct_l(3) , isspace(3) , isspace_l(3) , isupper(3) , isupper_l(3) , iswctype(3) , isxdigit(3) , isxdigit_l(3)
Copyright and license for this manual page