MirBSD manpage: isalnum(3)

ISALNUM(3)                 BSD Programmer's Manual                  ISALNUM(3)

NAME

     isalnum - alphanumeric character test

SYNOPSIS

     #include <ctype.h>

     int
     isalnum(int c);

DESCRIPTION

     The isalnum() macro tests for any character for which isalpha(3) or
     isdigit(3) is true.

RETURN VALUES

     The isalnum() macro returns zero if the character tests false or non-zero
     if the character tests true.

SEE ALSO

     isalpha(3), isascii(3), isblank(3), iscntrl(3), isdigit(3), isgraph(3),
     islower(3), isprint(3), ispunct(3), isspace(3), isupper(3), isxdigit(3),
     stdio(3), toascii(3), tolower(3), toupper(3), ascii(7)

STANDARDS

     The isalnum() function conforms to ANSI X3.159-1989 ("ANSI C89").

CAVEATS

     The argument to isalnum() must be EOF or representable as an unsigned
     char; otherwise, the result is undefined.

MirBSD #10-current              June 29, 1991                                1