mirror of https://github.com/mkerrisk/man-pages
54 lines
1.7 KiB
Groff
54 lines
1.7 KiB
Groff
.\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
|
|
.\"
|
|
.\" This is free documentation; you can redistribute it and/or
|
|
.\" modify it under the terms of the GNU General Public License as
|
|
.\" published by the Free Software Foundation; either version 2 of
|
|
.\" the License, or (at your option) any later version.
|
|
.\"
|
|
.\" References consulted:
|
|
.\" GNU glibc-2 source code and manual
|
|
.\" Dinkumware C library reference http://www.dinkumware.com/
|
|
.\" OpenGroup's Single Unix specification http://www.UNIX-systems.org/online.html
|
|
.\" ISO/IEC 9899:1999
|
|
.\"
|
|
.TH ISWBLANK 3 1999-07-25 "GNU" "Linux Programmer's Manual"
|
|
.SH NAME
|
|
iswblank \- test for whitespace wide character
|
|
.SH SYNOPSIS
|
|
.nf
|
|
.B #include <wctype.h>
|
|
.sp
|
|
.BI "int iswblank(wint_t " wc );
|
|
.fi
|
|
.SH DESCRIPTION
|
|
The \fBiswblank\fP() function is the wide-character equivalent of the
|
|
\fBisblank\fP(3) function.
|
|
It tests whether \fIwc\fP is a wide character
|
|
belonging to the wide-character class "blank".
|
|
.PP
|
|
The wide-character class "blank" is a subclass of the wide-character class
|
|
"space".
|
|
.PP
|
|
Being a subclass of the wide-character class "space",
|
|
the wide-character class "blank" is disjoint from the
|
|
wide-character class "graph" and therefore also disjoint
|
|
from its subclasses "alnum", "alpha", "upper", "lower", "digit",
|
|
"xdigit", "punct".
|
|
.PP
|
|
The wide-character class "blank" always contains
|
|
at least the space character
|
|
and the control character '\\t'.
|
|
.SH "RETURN VALUE"
|
|
The \fBiswblank\fP() function returns non-zero
|
|
if \fIwc\fP is a wide character
|
|
belonging to the wide-character class "blank".
|
|
Otherwise it returns zero.
|
|
.SH "CONFORMING TO"
|
|
POSIX.1-2001.
|
|
.SH "SEE ALSO"
|
|
.BR isblank (3),
|
|
.BR iswctype (3)
|
|
.SH NOTES
|
|
The behaviour of \fBiswblank\fP() depends on the LC_CTYPE category of the
|
|
current locale.
|