|ISALNUM(3)||Library Functions Manual||ISALNUM(3)|
isalnum() function tests for any character for which isalpha(3) or isdigit(3) is true, and
isalnum_l() tests for any character for which isalpha_l(3) or isdigit_l(3) is true.
In the C locale, the complete list of alphanumeric characters is A–Z, a–z, 0, and 1–9. OpenBSD always uses the C locale for these functions, ignoring the global locale, the thread-specific locale, and the locale argument.
isalnum() may depend on the
isalnum() function conforms to ANSI X3.159-1989 (“ANSI C89”), and
isalnum_l() to IEEE Std 1003.1-2008 (“POSIX.1”).
isalnum() function first appeared in Version 7 AT&T UNIX, and
isalnum_l() has been available since OpenBSD 6.2.
EOFor representable as an
unsigned char; otherwise, the result is undefined.
|September 5, 2017||OpenBSD-6.2|