ISWCTYPE(3) BSD Library Functions Manual ISWCTYPE(3)NAME
iswctype -- test a character for character class identifier
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <wctype.h>
int
iswctype(wint_t wc, wctype_t charclass);
DESCRIPTION
The iswctype() function returns a boolean value that indicates whether a wide character wc is in charclass.
The behaviour of iswctype() is undefined if the iswctype() function is called with an invalid charclass (changes of LC_CTYPE category invali-
date charclass) or invalid wide character wc.
The behaviour of iswctype() is affected by the LC_CTYPE category of the current locale.
RETURN VALUES
The iswctype() returns:
0 wc is not in charclass.
non-zero wc is in charclass.
ERRORS
No errors are defined.
SEE ALSO setlocale(3), towctrans(3), wctrans(3), wctype(3)STANDARDS
The iswctype() function conforms to ISO/IEC 9899/AMD1:1995 (``ISO C90, Amendment 1'').
BSD March 4, 2003 BSD
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), nextwctype(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
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