MirBSD manpage: iscntrl(3)

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

NAME

     iscntrl - control character test

SYNOPSIS

     #include <ctype.h>

     int
     iscntrl(int c);

DESCRIPTION

     The iscntrl() function tests for any control character.

RETURN VALUES

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

SEE ALSO

     isalnum(3), isalpha(3), isascii(3), isblank(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 iscntrl() function conforms to ANSI X3.159-1989 ("ANSI C89").

CAVEATS

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

MirBSD #10-current              June 29, 1991                                1