lib/libutils/isoc/iscntrl.c

// SPDX-License-Identifier: BSD-2-Clause
/*
 * Copyright (c) 2019, KAIST
 */
#include <ctype.h>

int iscntrl(int c)
{
	if (c < 0x20 || c == 0x7f)
		return 1;
	return 0;
}