freebsd-skq/lib/libc/locale/isspace.3

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.\"     @(#)isspace.3	8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
.Dd July 17, 2005
.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.
The value of the argument must be representable as an
.Vt "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
The
.Bx 4.4
extension of accepting arguments outside of the range of the
.Vt "unsigned char"
type in locales with large character sets is considered obsolete
and may not be supported in future releases.
The
.Fn iswspace
function should be used instead.
.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 .