1.\" Copyright (c) 1991, 1993
2.\" The Regents of the University of California. All rights reserved.
3.\"
4.\" This code is derived from software contributed to Berkeley by
5.\" the American National Standards Committee X3, on Information
6.\" Processing Systems.
7.\"
8.\" Redistribution and use in source and binary forms, with or without
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25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30.\" SUCH DAMAGE.
31.\"
32.\" @(#)isspace.3 8.1 (Berkeley) 6/4/93
33.\" $FreeBSD: head/lib/libc/locale/isspace.3 233992 2012-04-07 09:05:30Z joel $
34.\"
35.Dd July 17, 2005
36.Dt ISSPACE 3
37.Os
38.Sh NAME
39.Nm isspace
40.Nd white-space character test
41.Sh LIBRARY
42.Lb libc
43.Sh SYNOPSIS
44.In ctype.h
45.Ft int
46.Fn isspace "int c"
47.Sh DESCRIPTION
48The
49.Fn isspace
50function tests for white-space characters.
51For any locale, this includes the following standard characters:
52.Bl -column \&`\et''___ \&``\et''___ \&``\et''___ \&``\et''___ \&``\et''___ \&``\et''___
53.It "\&``\et''" Ta "``\en''" Ta "``\ev''" Ta "``\ef''" Ta "``\er''" Ta "`` ''"
54.El
55.Pp
56In the "C" locale,
57.Fn isspace
58returns non-zero for these characters only.
59The value of the argument must be representable as an
60.Vt "unsigned char"
61or the value of
62.Dv EOF .
63.Sh RETURN VALUES
64The
65.Fn isspace
66function returns zero if the character tests false and
67returns non-zero if the character tests true.
68.Sh COMPATIBILITY
69The
70.Bx 4.4
71extension of accepting arguments outside of the range of the
72.Vt "unsigned char"
73type in locales with large character sets is considered obsolete
74and may not be supported in future releases.
75The
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80.Xr iswspace 3 ,
81.Xr multibyte 3 ,
82.Xr ascii 7
83.Sh STANDARDS
84The
85.Fn isspace
86function conforms to
87.St -isoC .
2.\" The Regents of the University of California. All rights reserved.
3.\"
4.\" This code is derived from software contributed to Berkeley by
5.\" the American National Standards Committee X3, on Information
6.\" Processing Systems.
7.\"
8.\" Redistribution and use in source and binary forms, with or without
--- 16 unchanged lines hidden (view full) ---
25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30.\" SUCH DAMAGE.
31.\"
32.\" @(#)isspace.3 8.1 (Berkeley) 6/4/93
33.\" $FreeBSD: head/lib/libc/locale/isspace.3 233992 2012-04-07 09:05:30Z joel $
34.\"
35.Dd July 17, 2005
36.Dt ISSPACE 3
37.Os
38.Sh NAME
39.Nm isspace
40.Nd white-space character test
41.Sh LIBRARY
42.Lb libc
43.Sh SYNOPSIS
44.In ctype.h
45.Ft int
46.Fn isspace "int c"
47.Sh DESCRIPTION
48The
49.Fn isspace
50function tests for white-space characters.
51For any locale, this includes the following standard characters:
52.Bl -column \&`\et''___ \&``\et''___ \&``\et''___ \&``\et''___ \&``\et''___ \&``\et''___
53.It "\&``\et''" Ta "``\en''" Ta "``\ev''" Ta "``\ef''" Ta "``\er''" Ta "`` ''"
54.El
55.Pp
56In the "C" locale,
57.Fn isspace
58returns non-zero for these characters only.
59The value of the argument must be representable as an
60.Vt "unsigned char"
61or the value of
62.Dv EOF .
63.Sh RETURN VALUES
64The
65.Fn isspace
66function returns zero if the character tests false and
67returns non-zero if the character tests true.
68.Sh COMPATIBILITY
69The
70.Bx 4.4
71extension of accepting arguments outside of the range of the
72.Vt "unsigned char"
73type in locales with large character sets is considered obsolete
74and may not be supported in future releases.
75The
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80.Xr iswspace 3 ,
81.Xr multibyte 3 ,
82.Xr ascii 7
83.Sh STANDARDS
84The
85.Fn isspace
86function conforms to
87.St -isoC .