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() function returns zero if the character tests false and
     returns non-zero if the character tests true.


SEE ALSO

     ctype(3), 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 behavior is undefined.  See the CAVEATS section of
     ctype(3) for more details.

NetBSD 10.1                     April 17, 2008                     NetBSD 10.1