iscntrl(3) - NetBSD Manual Pages

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ISCNTRL(3)                NetBSD 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 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),  toascii(3),  tolower(3),  toupper(3),
     stdio(3),  ascii(7)


STANDARDS

     The iscntrl() function conforms to ANSI X3.159-1989 (``ANSI C'').

4.4BSD                           June 29, 1991                               1