iswalnum(3)

NAME

iswalnum, iswalpha, iswascii, iswblank, iswcntrl, iswdigit,

iswgraph,
iswhexnumber, iswideogram, iswlower, iswnumber,

iswphonogram, iswprint,
iswpunct, iswrune, iswspace, iswspecial, iswupper, iswxdigit

- wide character classification utilities

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <wctype.h>
int
iswalnum(wint_t wc);
int
iswalpha(wint_t wc);
int
iswascii(wint_t wc);
int
iswblank(wint_t wc);
int
iswcntrl(wint_t wc);
int
iswdigit(wint_t wc);
int
iswgraph(wint_t wc);
int
iswhexnumber(wint_t wc);
int
iswideogram(wint_t wc);
int
iswlower(wint_t wc);
int
iswnumber(wint_t wc);
int
iswphonogram(wint_t wc);
int
iswprint(wint_t wc);
int
iswpunct(wint_t wc);
int
iswrune(wint_t wc);
int
iswspace(wint_t wc);
int
iswspecial(wint_t wc);
int
iswupper(wint_t wc);
int
iswxdigit(wint_t wc);

DESCRIPTION

The above functions are character classification utility

functions, for
use with wide characters (wchar_t or wint_t). See the de

scription for
the similarly-named single byte classification functions

(like
isalnum(3)), for details.

RETURN VALUES

The functions return zero if the character tests false and

return nonzero if the character tests true.

SEE ALSO

isalnum(3), isalpha(3), isascii(3), isblank(3), iscntrl(3),

isdigit(3),
isgraph(3), ishexnumber(3), isideogram(3), islower(3), is

number(3),
isphonogram(3), isprint(3), ispunct(3), isrune(3), iss

pace(3),
isspecial(3), isupper(3), isxdigit(3), wctype(3)

STANDARDS

These functions conform to , except iswascii(),

iswhexnumber(),
iswideogram(), iswnumber(), iswphonogram(), iswrune() and

iswspecial(),
which are FreeBSD extensions.

CAVEATS

The result of these functions is undefined unless the argu

ment is WEOF or
a valid wchar_t value for the current locale.

BSD October 3, 2002

BSD