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Mac OS X / Darwin man pages : isprint (3)
isprint (3)

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Name

isprint - printing character test (space character inclusive)

Library

Standard C Library (libc, -lc)

Synopsis

#include <ctype.h>

int
isprint(int c);

Description

The isprint() function tests for any printing character including space (` `). For single C chars locales (see multibyte(3) ) the value of the argument is 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 ``~''

Return Values

The isprint() function returns zero if the character tests false and returns non-zero if the character tests true.

Compatibility

Although isprint() accepts arguments outside of the range of the unsigned char type in locales with large character sets, this is a 4.4BSD extension and the iswprint() function should be used instead for maximum portability.

See Also

ctype(3) , iswprint(3) , multibyte(3) , ascii(7)

Standards

The isprint() function conforms to ISO/IEC 9899:1990 (``ISO C89'').

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