Function cirbuf_del_buf_tail

dpdk/lib/cmdline/cmdline_cirbuf.c:247–263

/* buffer del */

int
cirbuf_del_buf_tail(struct cirbuf *cbuf, unsigned int size)
{
	if (!cbuf || !size || size > CIRBUF_GET_LEN(cbuf))
		return -EINVAL;

	cbuf->len -= size;
	if (CIRBUF_IS_EMPTY(cbuf)) {
		cbuf->end  += (cbuf->maxlen - size + 1);
		cbuf->end %= cbuf->maxlen;
	}
	else {
		cbuf->end  += (cbuf->maxlen - size);
		cbuf->end %= cbuf->maxlen;
	}
	return 0;
}

/* del at head */