1.\" $NetBSD: toascii.3,v 1.13 2010/04/30 04:46:18 jruoho Exp $ 2.\" 3.\" Copyright (c) 1993 4.\" The Regents of the University of California. 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.\" @(#)toascii.3 8.1 (Berkeley) 6/4/93 31.\" 32.Dd April 30, 2010 33.Dt TOASCII 3 34.Os 35.Sh NAME 36.Nm toascii 37.Nd convert a byte to 7-bit ASCII 38.Sh LIBRARY 39.Lb libc 40.Sh SYNOPSIS 41.In ctype.h 42.Ft int 43.Fn toascii "int c" 44.Sh DESCRIPTION 45The 46.Fn toascii 47function returns the argument with all but the lower 7 bits cleared. 48.Sh RETURN VALUES 49The 50.Fn toascii 51function always returns a valid ASCII character. 52The result is a non-negative integer in the 53range from 0 to 127, inclusive. 54.Sh SEE ALSO 55.Xr ctype 3 , 56.Xr isalnum 3 , 57.Xr isalpha 3 , 58.Xr isascii 3 , 59.Xr iscntrl 3 , 60.Xr isdigit 3 , 61.Xr isgraph 3 , 62.Xr islower 3 , 63.Xr isprint 3 , 64.Xr ispunct 3 , 65.Xr isspace 3 , 66.Xr isupper 3 , 67.Xr isxdigit 3 , 68.Xr stdio 3 , 69.Xr tolower 3 , 70.Xr toupper 3 , 71.Xr ascii 7 72.Sh STANDARDS 73The 74.Fn toascii 75function conforms to 76.St -xpg4 77and 78.St -p1003.1-2001 . 79The 80.St -p1003.1-2008 81revision however marked it as obsolete, noting that 82.Fn toascii 83cannot be used portably in a localized application. 84