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Command: isprint | Section: 3 | Source: OpenBSD | File: isprint.3
ISPRINT(3) FreeBSD Library Functions Manual ISPRINT(3)
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.
FreeBSD 14.1-RELEASE-p8 September 11, 2022 FreeBSD 14.1-RELEASE-p8