NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | STANDARDS | HISTORY | NOTES | SEE ALSO |
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wctype(3) Library Functions Manual wctype(3)
wctype - wide-character classification
Standard C library (libc, -lc)
#include <wctype.h> wctype_t wctype(const char *name);
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
The wctype() function returns a property descriptor if the name is valid. Otherwise, it returns (wctype_t) 0.
For an explanation of the terms used in this section, see attributes(7). ┌───────────────────────────────┬───────────────┬────────────────┐ │Interface │ Attribute │ Value │ ├───────────────────────────────┼───────────────┼────────────────┤ │wctype() │ Thread safety │ MT-Safe locale │ └───────────────────────────────┴───────────────┴────────────────┘
C11, POSIX.1-2008.
POSIX.1-2001, C99.
The behavior of wctype() depends on the LC_CTYPE category of the current locale.
iswctype(3)
Linux man-pages 6.04 2023-03-30 wctype(3)
Pages that refer to this page: iswctype(3), regex(7)