| 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 --- 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.\" @(#)iscntrl.3 8.1 (Berkeley) 6/4/93 |
| 33.\" $FreeBSD: head/lib/libc/locale/iscntrl.3 232935 2012-03-13 20:02:41Z theraven $ |
| 34.\" 35.Dd July 17, 2005 36.Dt ISCNTRL 3 37.Os 38.Sh NAME 39.Nm iscntrl 40.Nd control character test 41.Sh LIBRARY 42.Lb libc 43.Sh SYNOPSIS 44.In ctype.h 45.Ft int 46.Fn iscntrl "int c" |
| 47.Ft int 48.Fn iscntrl_l "int c" "locale_t loc" |
| 49.Sh DESCRIPTION 50The 51.Fn iscntrl 52function tests for any control character. 53The value of the argument must be representable as an 54.Vt "unsigned char" 55or the value of 56.Dv EOF . --- 5 unchanged lines hidden (view full) --- 62.It "\&000\ NUL \t001\ SOH \t002\ STX \t003\ ETX \t004\ EOT" 63.It "\&005\ ENQ \t006\ ACK \t007\ BEL \t010\ BS \t011\ HT" 64.It "\&012\ NL \t013\ VT \t014\ NP \t015\ CR \t016\ SO" 65.It "\&017\ SI \t020\ DLE \t021\ DC1 \t022\ DC2 \t023\ DC3" 66.It "\&024\ DC4 \t025\ NAK \t026\ SYN \t027\ ETB \t030\ CAN" 67.It "\&031\ EM \t032\ SUB \t033\ ESC \t034\ FS \t035\ GS" 68.It "\&036\ RS \t037\ US \t177\ DEL" 69.El |
| 70.Pp 71The 72.Fn iscntrl_l 73function takes an explicit locale argument, whereas the 74.Fn iscntrl 75function uses the current global or per-thread locale. |
| 76.Sh RETURN VALUES 77The 78.Fn iscntrl 79function returns zero if the character tests false and 80returns non-zero if the character tests true. 81.Sh COMPATIBILITY 82The 83.Bx 4.4 84extension of accepting arguments outside of the range of the 85.Vt "unsigned char" 86type in locales with large character sets is considered obsolete 87and may not be supported in future releases. 88The 89.Fn iswcntrl 90function should be used instead. 91.Sh SEE ALSO 92.Xr ctype 3 , 93.Xr iswcntrl 3 , |
| 94.Xr xlocale 3 , |
| 95.Xr ascii 7 96.Sh STANDARDS 97The 98.Fn iscntrl 99function conforms to 100.St -isoC . |
| 101The 102.Fn iscntrl_l 103function conforms to 104.St -p1003.1-2008 . |