wctype(3C) Standard C Library Functions 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)SunOS 5.11 14 Aug 2002 wctype(3C)
Check Out this Related Man Page
WCTYPE(3) BSD Library Functions Manual WCTYPE(3)NAME
iswctype, iswctype_l, wctype, wctype_l -- wide character class functions
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <wctype.h>
int
iswctype(wint_t wc, wctype_t charclass);
wctype_t
wctype(const char *property);
#include <wctype.h>
#include <xlocale.h>
int
iswctype_l(wint_t wc, wctype_t charclass, locale_t loc);
wctype_t
wctype_l(const char *property, locale_t loc);
DESCRIPTION
The wctype() function returns a value of type wctype_t, which represents the requested wide character class and may be used as the second
argument for calls to iswctype().
The following character class names are recognised:
alnum cntrl ideogram print space xdigit
alpha digit lower punct special
blank graph phonogram rune upper
The iswctype() function checks whether the wide character wc is in the character class charclass.
Although the iswctype() and wctype() functions use the current locale, the iswctype_l() and wctype_l() functions may be passed locales
directly. See xlocale(3) for more information.
RETURN VALUES
The iswctype() function returns non-zero if and only if wc has the property described by charclass, or charclass is zero.
The wctype() function returns 0 if property is invalid; otherwise, it returns a value of type wctype_t that can be used in subsequent calls
to iswctype().
EXAMPLES
Reimplement iswalpha(3) in terms of iswctype() and wctype():
int
myiswalpha(wint_t wc)
{
return (iswctype(wc, wctype("alpha")));
}
SEE ALSO ctype(3), xlocale(3)STANDARDS
The iswctype() and wctype() functions conform to IEEE Std 1003.1-2001 (``POSIX.1''). The ``ideogram'', ``phonogram'' ``special'', and
``rune'' character classes are extensions.
HISTORY
The iswctype() and wctype() functions first appeared in FreeBSD 5.0.
BSD March 27, 2004 BSD