1.\" $OpenBSD: isgraph.3,v 1.12 2017/09/05 03:16:13 schwarze Exp $ 2.\" 3.\" Copyright (c) 1991 The Regents of the University of California. 4.\" Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org> 5.\" All rights reserved. 6.\" 7.\" This code is derived from software contributed to Berkeley by 8.\" the American National Standards Committee X3, on Information 9.\" Processing Systems. 10.\" 11.\" Redistribution and use in source and binary forms, with or without 12.\" modification, are permitted provided that the following conditions 13.\" are met: 14.\" 1. Redistributions of source code must retain the above copyright 15.\" notice, this list of conditions and the following disclaimer. 16.\" 2. Redistributions in binary form must reproduce the above copyright 17.\" notice, this list of conditions and the following disclaimer in the 18.\" documentation and/or other materials provided with the distribution. 19.\" 3. Neither the name of the University nor the names of its contributors 20.\" may be used to endorse or promote products derived from this software 21.\" without specific prior written permission. 22.\" 23.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33.\" SUCH DAMAGE. 34.\" 35.Dd $Mdocdate: September 5 2017 $ 36.Dt ISGRAPH 3 37.Os 38.Sh NAME 39.Nm isgraph , 40.Nm isgraph_l 41.Nd printing single-byte character test (space character exclusive) 42.Sh SYNOPSIS 43.In ctype.h 44.Ft int 45.Fn isgraph "int c" 46.Ft int 47.Fn isgraph_l "int c" "locale_t locale" 48.Sh DESCRIPTION 49The 50.Fn isgraph 51and 52.Fn isgraph_l 53functions tests for any printing character except space 54.Pq Sq \ \& . 55.Pp 56In the C locale, the complete list of printing characters 57consists of the characters numbered 0x21\(en0x7e, which is 58the union of the characters for which 59.Xr isalnum 3 60or 61.Xr ispunct 3 62is true. 63.Ox 64always uses the C locale for these functions, 65ignoring the global locale, the thread-specific locale, and the 66.Fa locale 67argument. 68.Sh RETURN VALUES 69These functions return zero if the character tests false or 70non-zero if the character tests true. 71.Sh ENVIRONMENT 72On systems supporting non-ASCII single-byte character encodings, 73results of these functions may differ, and the results of 74.Fn isgraph 75may depend on the 76.Ev LC_CTYPE 77.Xr locale 1 . 78.Sh SEE ALSO 79.Xr isalnum 3 , 80.Xr isalpha 3 , 81.Xr isascii 3 , 82.Xr isblank 3 , 83.Xr iscntrl 3 , 84.Xr isdigit 3 , 85.Xr islower 3 , 86.Xr isprint 3 , 87.Xr ispunct 3 , 88.Xr isspace 3 , 89.Xr isupper 3 , 90.Xr iswgraph 3 , 91.Xr isxdigit 3 , 92.Xr stdio 3 , 93.Xr toascii 3 , 94.Xr tolower 3 , 95.Xr toupper 3 , 96.Xr ascii 7 97.Sh STANDARDS 98The 99.Fn isgraph 100function conforms to 101.St -ansiC , 102and 103.Fn isgraph_l 104to 105.St -p1003.1-2008 . 106.Sh HISTORY 107The 108.Fn isgraph 109function first appeared in 110.At III , 111and 112.Fn isgraph_l 113has been available since 114.Ox 6.2 . 115.Sh CAVEATS 116The argument 117.Fa c 118must be 119.Dv EOF 120or representable as an 121.Li unsigned char ; 122otherwise, the result is undefined. 123