wctype man page

wctype — wide-character classification

Synopsis

#include <wctype.h>

wctype_t wctype(const char *name);

Description

The wctype_t type represents a property which a wide character may or may not have. In other words, it represents a class of wide characters. This type's nature is implementation-dependent, but the special value (wctype_t) 0 denotes an invalid property. Nonzero wctype_t values can be passed to the iswctype(3) function to actually test whether a given wide character has the property.

The wctype() function returns a property, given by its name. The set of valid names depends on the LC_CTYPE category of the current locale, but the following names are valid in all locales.

"alnum" - realizes the isalnum(3) classification function
"alpha" - realizes the isalpha(3) classification function
"blank" - realizes the isblank(3) classification function
"cntrl" - realizes the iscntrl(3) classification function
"digit" - realizes the isdigit(3) classification function
"graph" - realizes the isgraph(3) classification function
"lower" - realizes the islower(3) classification function
"print" - realizes the isprint(3) classification function
"punct" - realizes the ispunct(3) classification function
"space" - realizes the isspace(3) classification function
"upper" - realizes the isupper(3) classification function
"xdigit" - realizes the isxdigit(3) classification function

Return Value

The wctype() function returns a property descriptor if the name is valid. Otherwise, it returns (wctype_t) 0.

Attributes

For an explanation of the terms used in this section, see attributes(7).

InterfaceAttributeValue
wctype()Thread safetyMT-Safe locale

Conforming to

POSIX.1-2001, POSIX.1-2008, C99.

Notes

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

See Also

iswctype(3)

Colophon

This page is part of release 4.08 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/.

Referenced By

iswctype(3), regex(7).

2015-08-08 GNU Linux Programmer's Manual