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Diffstat (limited to 'lib/libc/locale/iscntrl.3')
-rw-r--r-- | lib/libc/locale/iscntrl.3 | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/lib/libc/locale/iscntrl.3 b/lib/libc/locale/iscntrl.3 new file mode 100644 index 0000000..a67e6a4 --- /dev/null +++ b/lib/libc/locale/iscntrl.3 @@ -0,0 +1,91 @@ +.\" 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. +.\" 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. +.\" +.\" @(#)iscntrl.3 8.1 (Berkeley) 6/4/93 +.\" $FreeBSD$ +.\" +.Dd July 17, 2005 +.Dt ISCNTRL 3 +.Os +.Sh NAME +.Nm iscntrl +.Nd control character test +.Sh LIBRARY +.Lb libc +.Sh SYNOPSIS +.In ctype.h +.Ft int +.Fn iscntrl "int c" +.Sh DESCRIPTION +The +.Fn iscntrl +function tests for any control character. +The value of the argument must be representable as an +.Vt "unsigned char" +or the value of +.Dv EOF . +.Pp +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 "\&000\ NUL \t001\ SOH \t002\ STX \t003\ ETX \t004\ EOT" +.It "\&005\ ENQ \t006\ ACK \t007\ BEL \t010\ BS \t011\ HT" +.It "\&012\ NL \t013\ VT \t014\ NP \t015\ CR \t016\ SO" +.It "\&017\ SI \t020\ DLE \t021\ DC1 \t022\ DC2 \t023\ DC3" +.It "\&024\ DC4 \t025\ NAK \t026\ SYN \t027\ ETB \t030\ CAN" +.It "\&031\ EM \t032\ SUB \t033\ ESC \t034\ FS \t035\ GS" +.It "\&036\ RS \t037\ US \t177\ DEL" +.El +.Sh RETURN VALUES +The +.Fn iscntrl +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 iswcntrl +function should be used instead. +.Sh SEE ALSO +.Xr ctype 3 , +.Xr iswcntrl 3 , +.Xr ascii 7 +.Sh STANDARDS +The +.Fn iscntrl +function conforms to +.St -isoC . |