EN JA
ISWALNUM(3)
ISWALNUM(3) FreeBSD Library Functions Manual ISWALNUM(3)

NAME

iswalnum, iswalpha, iswascii, iswblank, iswcntrl, iswdigit, iswgraph, iswhexnumber, iswideogram, iswlower, iswnumber, iswphonogram, iswprint, iswpunct, iswrune, iswspace, iswspecial, iswupper, iswxdigitwide 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 description 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 non-zero if the character tests true.

STANDARDS

These functions conform to IEEE Std 1003.1-2001 (“POSIX.1”), except iswascii(), iswhexnumber(), iswideogram(), iswnumber(), iswphonogram(), iswrune() and iswspecial(), which are FreeBSD extensions.

CAVEATS

The result of these functions is undefined unless the argument is WEOF or a valid wchar_t value for the current locale.
October 3, 2002 FreeBSD