1.\"	$OpenBSD: isgraph.3,v 1.12 2017/09/05 03:16:13 schwarze Exp $
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4.\" Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
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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