iscntrl(3) - NetBSD Manual Pages

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ISCNTRL(3)              NetBSD Library Functions Manual             ISCNTRL(3)


NAME

     iscntrl - control character test


LIBRARY

     Standard C Library (libc, -lc)


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 and returns
     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 C'').


CAVEATS

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

NetBSD 2.0                       June 29, 1991                      NetBSD 2.0