2 * Copyright Droids Corporation (2007)
3 * Olivier MATZ <zer0@droids-corp.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 * Revision : $Id: cirbuf_add_buf_tail.c,v 1.1.2.2 2007-09-12 17:52:20 zer0 Exp $
31 cirbuf_add_buf_tail(struct cirbuf * cbuf, const char * c, cirbuf_uint n)
35 if (!n || n > CIRBUF_GET_FREELEN(cbuf))
38 e = CIRBUF_IS_EMPTY(cbuf) ? 1 : 0;
40 if (n < cbuf->maxlen - cbuf->end - 1 + e) {
41 dprintf("s[%d] -> d[%d] (%d)\n", 0, cbuf->end + !e, n);
42 memcpy(cbuf->buf + cbuf->end + !e, c, n);
45 dprintf("s[%d] -> d[%d] (%d)\n", cbuf->end + !e, 0, cbuf->maxlen - cbuf->end - 1 + e);
46 dprintf("s[%d] -> d[%d] (%d)\n", cbuf->maxlen - cbuf->end - 1 + e, 0, n - cbuf->maxlen + cbuf->end + 1 - e);
47 memcpy(cbuf->buf + cbuf->end + !e, c, cbuf->maxlen - cbuf->end - 1 + e);
48 memcpy(cbuf->buf, c + cbuf->maxlen - cbuf->end - 1 + e, n - cbuf->maxlen + cbuf->end + 1 - e);
52 cbuf->end %= cbuf->maxlen;