wctype - Online Linux Manual PageSection : 3
Updated : 2022-12-15
Source : Linux man-pages 6.03
NAMEwctype − wide-character classification
LIBRARYStandard C library (libc, −lc)
SYNOPSIS#include <wctype.h>wctype_t wctype(const char *name);
DESCRIPTIONThe 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 VALUEThe wctype() function returns a property descriptor if the name is valid. Otherwise, it returns (wctype_t) 0.
ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7). InterfaceAttributeValue wctype() Thread safetyMT-Safe locale
STANDARDSPOSIX.1-2001, POSIX.1-2008, C99.
NOTESThe behavior of wctype() depends on the LC_CTYPE category of the current locale.
SEE ALSOiswctype(3) 0
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