NAME
isprint, isprint_l
— printing single-byte character
test (space character inclusive)
SYNOPSIS
#include
<ctype.h>
int
isprint(int
c);
int
isprint_l(int
c, locale_t
locale);
DESCRIPTION
The
isprint()
and
isprint_l()
functions test for any printing character including space
(‘ ’).
In the C locale, the complete list of printing characters consists of the characters numbered 0x20–0x7e, which is the union of the characters for which isalnum(3) or ispunct(3) is true, and the space character. OpenBSD always uses the C locale for these functions, ignoring the global locale, the thread-specific locale, and the locale argument.
RETURN VALUES
These functions return zero if the character tests false or non-zero if the character tests true.
ENVIRONMENT
On systems supporting non-ASCII single-byte character encodings,
results of these functions may differ, and the results of
isprint() may depend on the
LC_CTYPE
locale(1).
SEE ALSO
isalnum(3), isalpha(3), isascii(3), isblank(3), iscntrl(3), isdigit(3), isgraph(3), islower(3), ispunct(3), isspace(3), isupper(3), iswprint(3), isxdigit(3), stdio(3), toascii(3), tolower(3), toupper(3), ascii(7)
STANDARDS
The isprint() function conforms to
ANSI X3.159-1989 (“ANSI C89”),
and isprint_l() to IEEE Std
1003.1-2008 (“POSIX.1”).
HISTORY
The isprint() function first appeared in
Version 7 AT&T UNIX, and
isprint_l() has been available since
OpenBSD 6.2.
CAVEATS
The argument c must be
EOF or representable as an unsigned
char; otherwise, the result is undefined.