NAME
isgraph —
printing character test (space
character exclusive)
LIBRARY
library “libc”
SYNOPSIS
#include
<ctype.h>
int
isgraph(int
c);
int
isgraph_l(int
c, locale_t
loc);
DESCRIPTION
Theisgraph()
function tests for any printing character except space
(‘ ’) and other locale-specific
space-like characters. The value of the argument must be representable as an
unsigned char or the value of
EOF.
In the ASCII character set, this includes the following characters (with their numeric values shown in octal):
| 041 ``!'' | 042 ``"'' | 043 ``#'' | 044 ``$'' | 045 ``%'' |
| 046 ``&'' | 047 ``''' | 050 ``('' | 051 ``)'' | 052 ``*'' |
| 053 ``+'' | 054 ``,'' | 055 ``-'' | 056 ``.'' | 057 ``/'' |
| 060 ``0'' | 061 ``1'' | 062 ``2'' | 063 ``3'' | 064 ``4'' |
| 065 ``5'' | 066 ``6'' | 067 ``7'' | 070 ``8'' | 071 ``9'' |
| 072 ``:'' | 073 ``;'' | 074 ``<'' | 075 ``='' | 076 ``>'' |
| 077 ``?'' | 100 ``@'' | 101 ``A'' | 102 ``B'' | 103 ``C'' |
| 104 ``D'' | 105 ``E'' | 106 ``F'' | 107 ``G'' | 110 ``H'' |
| 111 ``I'' | 112 ``J'' | 113 ``K'' | 114 ``L'' | 115 ``M'' |
| 116 ``N'' | 117 ``O'' | 120 ``P'' | 121 ``Q'' | 122 ``R'' |
| 123 ``S'' | 124 ``T'' | 125 ``U'' | 126 ``V'' | 127 ``W'' |
| 130 ``X'' | 131 ``Y'' | 132 ``Z'' | 133 ``['' | 134 ``\'' |
| 135 ``]'' | 136 ``^'' | 137 ``_'' | 140 ```'' | 141 ``a'' |
| 142 ``b'' | 143 ``c'' | 144 ``d'' | 145 ``e'' | 146 ``f'' |
| 147 ``g'' | 150 ``h'' | 151 ``i'' | 152 ``j'' | 153 ``k'' |
| 154 ``l'' | 155 ``m'' | 156 ``n'' | 157 ``o'' | 160 ``p'' |
| 161 ``q'' | 162 ``r'' | 163 ``s'' | 164 ``t'' | 165 ``u'' |
| 166 ``v'' | 167 ``w'' | 170 ``x'' | 171 ``y'' | 172 ``z'' |
| 173 ``{'' | 174 ``|'' | 175 ``}'' | 176 ``~'' |
The
isgraph_l()
function takes an explicit locale argument, whereas the
isgraph() function uses the current global or
per-thread locale.
RETURN VALUES
The isgraph() and
isgraph_l() functions return zero if the character
tests false and return non-zero if the character tests true.
COMPATIBILITY
The 4.4BSD extension of accepting
arguments outside of the range of the unsigned char
type in locales with large character sets is considered obsolete and may not
be supported in future releases. The iswgraph()
function should be used instead.
SEE ALSO
STANDARDS
The isgraph() function conforms to
ISO/IEC 9899:1990 (“ISO C90”).
The isgraph_l() function conforms to
IEEE Std 1003.1-2008 (“POSIX.1”).