man pages section 3: Basic Library Functions

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Updated: July 2014
 
 

wctype(3C)

Name

wctype - define character class

Synopsis

#include <wchar.h> 

wctype_t wctype(const char *charclass);

Description

The wctype () function is defined for valid character class names as defined in the current locale. The charclass is a string identifying a generic character class for which codeset-specific type information is required. The following character class names are defined in all locales:

alnum
alpha
blank
cntrl
digit
graph
lower
print
punct
space
upper
xdigit

Additional character class names defined in the locale definition file (category LC_CTYPE) can also be specified.

The function returns a value of type wctype_t, which can be used as the second argument to subsequent calls of iswctype(3C). wctype() determines values of wctype_t according to the rules of the coded character set defined by character type information in the program's locale (category LC_CTYPE). The values returned by wctype() are valid until a call to setlocale(3C) that modifies the category LC_CTYPE.

Return Values

The wctype() function returns 0 if the given character class name is not valid for the current locale (category LC_CTYPE); otherwise it returns an object of type wctype_t that can be used in calls to iswctype().

Attributes

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
CSI
Enabled
Interface Stability
Standard
MT-Level
MT-Safe with exceptions

See Also

iswctype(3C), setlocale(3C), attributes(5), standards(5)