Libc-320.tar.gz

[apple/libc.git] / locale / FreeBSD / isspace.3

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.\"     @(#)isspace.3	8.1 (Berkeley) 6/4/93
.\" $FreeBSD: src/lib/libc/locale/isspace.3,v 1.15 2002/10/06 10:15:38 tjr Exp $
.\"
.Dd October 6, 2002
.Dt ISSPACE 3
.Os
.Sh NAME
.Nm isspace
.Nd white-space character test
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In ctype.h
.Ft int
.Fn isspace "int c"
.Sh DESCRIPTION
The
.Fn isspace
function tests for the white-space characters.
For any locale, this includes the following standard characters:
.Pp
.Bl -column \&`\et''___ \&``\et''___ \&``\et''___ \&``\et''___ \&``\et''___ \&``\et''___
.It "\&``\et''\t``\en''\t``\ev''\t``\ef''\t``\er''\t`` ''"
.El
.Pp
In the "C" locale
.Fn isspace
successful test is limited to this characters only.
For single C
.Va char Ns s
locales (see
.Xr multibyte 3 )
the value of the argument is
representable as an
.Li unsigned char
or the value of
.Dv EOF .
.Sh RETURN VALUES
The
.Fn isspace
function returns zero if the character tests false and
returns non-zero if the character tests true.
.Sh COMPATIBILITY
Although
.Fn isspace
accepts arguments outside of the range of the
.Vt "unsigned char"
type in locales with large character sets,
this is a
.Bx 4.4
extension and the
.Fn iswspace
function should be used instead for maximum portability.
.Sh SEE ALSO
.Xr ctype 3 ,
.Xr iswspace 3 ,
.Xr multibyte 3 ,
.Xr ascii 7
.Sh STANDARDS
The
.Fn isspace
function conforms to
.St -isoC .