s/nonzero/non-zero/

[thirdparty/man-pages.git] / man3 / iswspace.3

.\" 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 ISWSPACE 3  1999-07-25 "GNU" "Linux Programmer's Manual"
.SH NAME
iswspace \- test for whitespace wide character
.SH SYNOPSIS
.nf
.B #include <wctype.h>
.sp
.BI "int iswspace(wint_t " wc );
.fi
.SH DESCRIPTION
The
.BR iswspace ()
function is the wide-character equivalent of the
.BR isspace (3)
function.
It tests whether \fIwc\fP is a wide character
belonging to the wide-character class "space".
.PP
The wide-character class "space" is disjoint from the wide-character class
"graph" and therefore also disjoint from its subclasses "alnum", "alpha",
"upper", "lower", "digit", "xdigit", "punct".
.\" Note: UNIX98 (susv2/xbd/locale.html) says that "space" and "graph" may
.\" have characters in common, except U+0020. But C99 (ISO/IEC 9899:1999
.\" section 7.25.2.1.10) says that "space" and "graph" are disjoint.
.PP
The wide-character class "space" contains the wide-character class "blank".
.PP
The wide-character class "space" always contains at least the space character
and the control characters '\\f', '\\n', '\\r', '\\t', '\\v'.
.SH "RETURN VALUE"
The
.BR iswspace ()
function returns non-zero if \fIwc\fP is a wide character
belonging to the wide-character class "space".
Otherwise it returns zero.
.SH "CONFORMING TO"
C99.
.SH NOTES
The behavior of
.BR iswspace ()
depends on the
.B LC_CTYPE
category of the
current locale.
.SH "SEE ALSO"
.BR isspace (3),
.BR iswctype (3)