iswcntrl()

Test a wide character to see if it's a control character

Synopsis:

#include <wctype.h>

int iswcntrl( wint_t wc );

Arguments:

wc: The wide character you want to test. This argument must be a wide-character code that corresponds to a valid character in the current locale, or must be WEOF; otherwise, the function's behavior is undefined.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The iswcntrl() function tests if the argument wc is a control wide character of the class cntrl. In the C locale, this class consists of the ASCII characters from 0 through 31.

Returns:

A nonzero value if the character is a member of the class cntrl, or 0 otherwise.

Classification:

ANSI, POSIX 1003.1

Safety:
Cancellation point	No
Interrupt handler	Yes
Signal handler	Yes
Thread	Yes

Caveats:

The result is valid only for wchar_t arguments and WEOF.