NAME
isprint, isprint_l
— printing character test (space
character inclusive)
LIBRARY
library “libc”
SYNOPSIS
#include
<ctype.h>
int
isprint(int
c);
int
isprint_l(int
c, locale_t
locale);
DESCRIPTION
Theisprint()
and
isprint_l()
functions test for any printing character, including space
(‘ ’). 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):
| 040 sp | 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 _l-suffixed version takes an explicit locale argument, whereas the non-suffixed version uses the current global or per-thread locale.
RETURN VALUES
The isprint() and
isprint_l() functions return zero if the character
tests false and returns 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 iswprint() and
iswprint_l() functions should be used instead.
SEE ALSO
ctype(3), ctype_l(3), iswprint(3), iswprint_l(3), xlocale(3), ascii(7)
STANDARDS
The isprint() function conforms to
ISO/IEC 9899:1990 (“ISO C90”).
The isprint_l() function conforms to
IEEE Std 1003.1-2008 (“POSIX.1”).