NAME
iswctype,
iswctype_l —
test whether a wide character belongs
to a character class
SYNOPSIS
#include
<wctype.h>
int
iswctype(wint_t
wc, wctype_t
charclass);
int
iswctype_l(wint_t
wc, wctype_t
charclass, locale_t
locale);
DESCRIPTION
These functions test whether the wide character wc belongs to charclass.
The behaviour is undefined if charclass or wc is invalid. When charclass is retrieved with wctype(3), it becomes invalid when the thread-specific character encoding locale is changed with uselocale(3) or when the global character encoding locale is changed with setlocale(3). When charclass is retrieved with wctype_l(3), it is only valid for use with the same locale argument.
RETURN VALUES
These functions return zero if the character tests false or non-zero if the character tests true.
SEE ALSO
iswalnum(3), newlocale(3), setlocale(3), towctrans(3), wctype(3)
STANDARDS
The iswctype() function conforms to
ISO/IEC 9899/AMD1:1995 (“ISO C90, Amendment
1”), and iswctype_l() to
IEEE Std 1003.1-2008 (“POSIX.1”).
HISTORY
The iswctype() function has been available
since OpenBSD 3.8, and
iswctype_l() since OpenBSD
6.2.