iscntrl(3)
- NetBSD Manual Pages
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 C89'').
CAVEATS
The argument to iscntrl() must be EOF or representable as an unsigned
char; otherwise, the result is undefined.
NetBSD 3.1 June 29, 1991 NetBSD 3.1
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