NAME
isprint, isprint_l
— printing character test (space
character inclusive)
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include
<ctype.h>
int
isprint(int
c);
int
isprint_l(int
c, locale_t
loc);
DESCRIPTION
The
isprint()
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
isprint_l()
function takes an explicit locale argument, whereas the
isprint() function uses the current global or
per-thread locale.
RETURN VALUES
The isprint() and
isprint_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 iswprint() or
iswprint_l() function 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”).
HISTORY
The isprint() function first appeared in
Version 7 AT&T UNIX.