mirror of https://github.com/mkerrisk/man-pages
62 lines
1.9 KiB
Groff
62 lines
1.9 KiB
Groff
.\" 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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.TH ISWSPACE 3 1999-07-25 "GNU" "Linux Programmer's Manual"
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.SH NAME
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iswspace \- 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 iswspace(wint_t " wc );
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.fi
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.SH DESCRIPTION
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The
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.BR iswspace ()
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function is the wide-character equivalent of the
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.BR isspace (3)
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function.
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It tests whether \fIwc\fP is a wide character
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belonging to the wide-character class "space".
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.PP
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The wide-character class "space" is disjoint from the wide-character class
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"graph" and therefore also disjoint from its subclasses "alnum", "alpha",
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"upper", "lower", "digit", "xdigit", "punct".
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.\" Note: UNIX98 (susv2/xbd/locale.html) says that "space" and "graph" may
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.\" have characters in common, except U+0020. But C99 (ISO/IEC 9899:1999
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.\" section 7.25.2.1.10) says that "space" and "graph" are disjoint.
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.PP
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The wide-character class "space" contains the wide-character class "blank".
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.PP
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The wide-character class "space" always contains at least the space character
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and the control
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characters \(aq\\f\(aq, \(aq\\n\(aq, \(aq\\r\(aq, \(aq\\t\(aq, \(aq\\v\(aq.
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.SH "RETURN VALUE"
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The
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.BR iswspace ()
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function returns non-zero if \fIwc\fP is a wide character
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belonging to the wide-character class "space".
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Otherwise it returns zero.
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.SH "CONFORMING TO"
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C99.
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.SH NOTES
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The behavior of
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.BR iswspace ()
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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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current locale.
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.SH "SEE ALSO"
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.BR isspace (3),
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.BR iswctype (3)
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