1.\" $OpenBSD: isascii.3,v 1.10 2007/05/31 19:19:28 jmc Exp $ 2.\" 3.\" Copyright (c) 1989, 1991 The Regents of the University of California. 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.Dd $Mdocdate: May 31 2007 $ 31.Dt ISASCII 3 32.Os 33.Sh NAME 34.Nm isascii 35.Nd ASCII character test 36.Sh SYNOPSIS 37.Fd #include <ctype.h> 38.Ft int 39.Fn isascii "int c" 40.Sh DESCRIPTION 41The 42.Fn isascii 43function tests for an 44.Tn ASCII 45character, which is any character with a value less than or 46equal to 0177. 47.Sh RETURN VALUES 48The 49.Fn isascii 50macro returns zero if the character tests false or 51non-zero if the character tests true. 52.Sh SEE ALSO 53.Xr isalnum 3 , 54.Xr isalpha 3 , 55.Xr isblank 3 , 56.Xr iscntrl 3 , 57.Xr isdigit 3 , 58.Xr isgraph 3 , 59.Xr islower 3 , 60.Xr isprint 3 , 61.Xr ispunct 3 , 62.Xr isspace 3 , 63.Xr isupper 3 , 64.Xr isxdigit 3 , 65.Xr stdio 3 , 66.Xr toascii 3 , 67.Xr tolower 3 , 68.Xr toupper 3 , 69.Xr ascii 7 70.Sh STANDARDS 71The 72.Fn isascii 73function conforms to 74.St -xpg4 . 75.Sh CAVEATS 76The argument to 77.Fn isascii 78must be 79.Dv EOF 80or representable as an 81.Li unsigned char ; 82otherwise, the result is undefined. 83