24ab237a89
to describe the 4.4BSD extension of accepting arguments outside the range of unsigned char. This gives us freedom to remove this extension when we remove the <rune.h> interface in FreeBSD 6.
100 lines
3.5 KiB
Groff
100 lines
3.5 KiB
Groff
.\" Copyright (c) 1991, 1993
|
|
.\" The Regents of the University of California. All rights reserved.
|
|
.\"
|
|
.\" This code is derived from software contributed to Berkeley by
|
|
.\" the American National Standards Committee X3, on Information
|
|
.\" Processing Systems.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 4. Neither the name of the University nor the names of its contributors
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)islower.3 8.1 (Berkeley) 6/4/93
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd July 30, 2004
|
|
.Dt ISLOWER 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm islower
|
|
.Nd lower-case character test
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In ctype.h
|
|
.Ft int
|
|
.Fn islower "int c"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn islower
|
|
function tests for any lower-case letters.
|
|
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 .
|
|
In the ASCII character set, this includes the following characters
|
|
(with their numeric values shown in octal):
|
|
.Pp
|
|
.Bl -column \&000_``0''__ \&000_``0''__ \&000_``0''__ \&000_``0''__ \&000_``0''__
|
|
.It "\&141\ ``a'' \t142\ ``b'' \t143\ ``c'' \t144\ ``d'' \t145\ ``e''"
|
|
.It "\&146\ ``f'' \t147\ ``g'' \t150\ ``h'' \t151\ ``i'' \t152\ ``j''"
|
|
.It "\&153\ ``k'' \t154\ ``l'' \t155\ ``m'' \t156\ ``n'' \t157\ ``o''"
|
|
.It "\&160\ ``p'' \t161\ ``q'' \t162\ ``r'' \t163\ ``s'' \t164\ ``t''"
|
|
.It "\&165\ ``u'' \t166\ ``v'' \t167\ ``w'' \t170\ ``x'' \t171\ ``y''"
|
|
.It "\&172\ ``z''"
|
|
.El
|
|
.Sh RETURN VALUES
|
|
The
|
|
.Fn islower
|
|
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 deprecated.
|
|
The
|
|
.Fn iswlower
|
|
function should be used instead for maximum portability.
|
|
.Sh SEE ALSO
|
|
.Xr ctype 3 ,
|
|
.Xr iswlower 3 ,
|
|
.Xr multibyte 3 ,
|
|
.Xr tolower 3 ,
|
|
.Xr ascii 7
|
|
.Sh STANDARDS
|
|
The
|
|
.Fn islower
|
|
function conforms to
|
|
.St -isoC .
|