freebsd/lib/libc/locale/iswalnum.3

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.\"     @(#)isalnum.3	5.2 (Berkeley) 6/29/91
.\" $FreeBSD$
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.Dd October 3, 2002
.Dt ISWALNUM 3
.Os
.Sh NAME
.Nm iswalnum ,
.Nm iswalpha ,
.Nm iswascii ,
.Nm iswblank ,
.Nm iswcntrl ,
.Nm iswdigit ,
.Nm iswgraph ,
.Nm iswhexnumber ,
.Nm iswideogram ,
.Nm iswlower ,
.Nm iswnumber ,
.Nm iswphonogram ,
.Nm iswprint ,
.Nm iswpunct ,
.Nm iswrune ,
.Nm iswspace ,
.Nm iswspecial ,
.Nm iswupper ,
.Nm iswxdigit
.Nd wide character classification utilities
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In wctype.h
.Ft int
.Fn iswalnum "wint_t wc"
.Ft int
.Fn iswalpha "wint_t wc"
.Ft int
.Fn iswascii "wint_t wc"
.Ft int
.Fn iswblank "wint_t wc"
.Ft int
.Fn iswcntrl "wint_t wc"
.Ft int
.Fn iswdigit "wint_t wc"
.Ft int
.Fn iswgraph "wint_t wc"
.Ft int
.Fn iswhexnumber "wint_t wc"
.Ft int
.Fn iswideogram "wint_t wc"
.Ft int
.Fn iswlower "wint_t wc"
.Ft int
.Fn iswnumber "wint_t wc"
.Ft int
.Fn iswphonogram "wint_t wc"
.Ft int
.Fn iswprint "wint_t wc"
.Ft int
.Fn iswpunct "wint_t wc"
.Ft int
.Fn iswrune "wint_t wc"
.Ft int
.Fn iswspace "wint_t wc"
.Ft int
.Fn iswspecial "wint_t wc"
.Ft int
.Fn iswupper "wint_t wc"
.Ft int
.Fn iswxdigit "wint_t wc"
.Sh DESCRIPTION
The above functions are character classification utility functions,
for use with wide characters
.Vt ( wchar_t
or
.Vt wint_t ) .
See the description for the similarly-named single byte classification
functions (like
.Xr isalnum 3 ) ,
for details.
.Sh RETURN VALUES
The functions return zero if the character tests false and
return non-zero if the character tests true.
.Sh SEE ALSO
.Xr isalnum 3 ,
.Xr isalpha 3 ,
.Xr isascii 3 ,
.Xr isblank 3 ,
.Xr iscntrl 3 ,
.Xr isdigit 3 ,
.Xr isgraph 3 ,
.Xr ishexnumber 3 ,
.Xr isideogram 3 ,
.Xr islower 3 ,
.Xr isnumber 3 ,
.Xr isphonogram 3 ,
.Xr isprint 3 ,
.Xr ispunct 3 ,
.Xr isrune 3 ,
.Xr isspace 3 ,
.Xr isspecial 3 ,
.Xr isupper 3 ,
.Xr isxdigit 3 ,
.Xr wctype 3
.Sh STANDARDS
These functions conform to
.St -p1003.1-2001 ,
except
.Fn iswascii ,
.Fn iswhexnumber ,
.Fn iswideogram ,
.Fn iswnumber ,
.Fn iswphonogram ,
.Fn iswrune
and
.Fn iswspecial ,
which are
.Fx
extensions.
.Sh CAVEATS
The result of these functions is undefined unless
the argument is
.Dv WEOF
or a valid
.Vt wchar_t
value for the current locale.