2004-11-03 13:51:07 +00:00
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.\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
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.\"
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.\" This is free documentation; you can redistribute it and/or
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.\" modify it under the terms of the GNU General Public License as
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.\" published by the Free Software Foundation; either version 2 of
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.\" the License, or (at your option) any later version.
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.\"
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.\" References consulted:
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.\" GNU glibc-2 source code and manual
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.\" Dinkumware C library reference http://www.dinkumware.com/
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.\" OpenGroup's Single Unix specification http://www.UNIX-systems.org/online.html
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.\" ISO/IEC 9899:1999
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.\"
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2007-07-08 12:11:40 +00:00
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.TH ISWBLANK 3 2007-07-26 "GNU" "Linux Programmer's Manual"
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2004-11-03 13:51:07 +00:00
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.SH NAME
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iswblank \- test for whitespace wide character
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.SH SYNOPSIS
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.nf
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.B #include <wctype.h>
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.sp
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.BI "int iswblank(wint_t " wc );
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.fi
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2007-07-08 12:11:40 +00:00
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.sp
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.in -4n
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Feature Test Macro Requirements for glibc (see
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.BR feature_test_macros (7)):
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.in
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.sp
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.ad l
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.BR iswblank ():
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_XOPEN_SOURCE\ >=\ 600 || _ISOC99_SOURCE; or
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.I cc\ -std=c99
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.ad b
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2004-11-03 13:51:07 +00:00
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.SH DESCRIPTION
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2007-05-12 09:06:04 +00:00
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The
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.BR iswblank ()
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function is the wide-character equivalent of the
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.BR isblank (3)
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function.
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2007-04-12 22:42:49 +00:00
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It tests whether \fIwc\fP is a wide character
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2007-04-24 19:40:35 +00:00
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belonging to the wide-character class "blank".
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2004-11-03 13:51:07 +00:00
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.PP
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2007-04-24 19:40:35 +00:00
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The wide-character class "blank" is a subclass of the wide-character class
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2004-11-03 13:51:07 +00:00
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"space".
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.PP
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2007-04-24 19:40:35 +00:00
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Being a subclass of the wide-character class "space",
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the wide-character class "blank" is disjoint from the
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wide-character class "graph" and therefore also disjoint
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2007-04-24 19:06:06 +00:00
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from its subclasses "alnum", "alpha", "upper", "lower", "digit",
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2004-11-03 13:51:07 +00:00
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"xdigit", "punct".
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.PP
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2007-04-24 19:40:35 +00:00
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The wide-character class "blank" always contains
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2007-04-24 19:06:06 +00:00
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at least the space character
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2004-11-03 13:51:07 +00:00
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and the control character '\\t'.
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.SH "RETURN VALUE"
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2007-05-12 09:06:04 +00:00
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The
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.BR iswblank ()
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2008-03-19 13:16:39 +00:00
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function returns non-zero
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2007-04-24 19:06:06 +00:00
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if \fIwc\fP is a wide character
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2007-04-24 19:40:35 +00:00
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belonging to the wide-character class "blank".
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2007-04-12 22:42:49 +00:00
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Otherwise it returns zero.
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2004-11-03 13:51:07 +00:00
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.SH "CONFORMING TO"
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2007-04-27 16:49:26 +00:00
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POSIX.1-2001.
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2004-11-03 13:51:07 +00:00
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.SH NOTES
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2007-06-08 09:56:56 +00:00
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The behavior of
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2007-05-12 09:06:04 +00:00
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.BR iswblank ()
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2007-06-22 18:25:23 +00:00
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depends on the
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.B LC_CTYPE
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category of the
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2004-11-03 13:51:07 +00:00
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current locale.
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2007-05-16 18:25:50 +00:00
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.SH "SEE ALSO"
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.BR isblank (3),
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.BR iswctype (3)
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