wctype - Man Page
wide-character classification
Library
Standard C library (libc, -lc)
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).
| Interface | Attribute | Value |
|---|---|---|
| wctype() | Thread safety | MT-Safe locale |
Standards
C11, POSIX.1-2008.
History
POSIX.1-2001, C99.
Notes
The behavior of wctype() depends on the LC_CTYPE category of the current locale.