15 cirbuf_init(struct cirbuf *cbuf, char *buf, unsigned int start, unsigned int maxlen)  in cirbuf_init()  argument
21 	cbuf->start = start;  in cirbuf_init()
22 	cbuf->end = start;  in cirbuf_init()
39 	if (n < cbuf->start + e) {  in cirbuf_add_buf_head()
40 		dprintf("s[%d] -> d[%d] (%d)\n", 0, cbuf->start - n + e, n);  in cirbuf_add_buf_head()
41 		memcpy(cbuf->buf + cbuf->start - n + e, c, n);  in cirbuf_add_buf_head()
44 		dprintf("s[%d] -> d[%d] (%d)\n", + n - (cbuf->start + e), 0,  in cirbuf_add_buf_head()
45 			cbuf->start + e);  in cirbuf_add_buf_head()
47 			(cbuf->start + e), 0, n - (cbuf->start + e));  in cirbuf_add_buf_head()
48 		memcpy(cbuf->buf, c  + n - (cbuf->start + e) , cbuf->start + e);  in cirbuf_add_buf_head()
49 		memcpy(cbuf->buf + cbuf->maxlen - n + (cbuf->start + e), c,  in cirbuf_add_buf_head()
50 		       n - (cbuf->start + e));  in cirbuf_add_buf_head()
53 	cbuf->start += (cbuf->maxlen - n + e);  in cirbuf_add_buf_head()
54 	cbuf->start %= cbuf->maxlen;  in cirbuf_add_buf_head()
96 		cbuf->start += (cbuf->maxlen - 1);  in __cirbuf_add_head()
97 		cbuf->start %= cbuf->maxlen;  in __cirbuf_add_head()
99 	cbuf->buf[cbuf->start] = c;  in __cirbuf_add_head()
153 	char tmp = cbuf->buf[cbuf->start];  in __cirbuf_shift_left()
156 		cbuf->buf[(cbuf->start+i)%cbuf->maxlen] =  in __cirbuf_shift_left()
157 			cbuf->buf[(cbuf->start+i+1)%cbuf->maxlen];  in __cirbuf_shift_left()
159 	cbuf->buf[(cbuf->start-1+cbuf->maxlen)%cbuf->maxlen] = tmp;  in __cirbuf_shift_left()
160 	cbuf->start += (cbuf->maxlen - 1);  in __cirbuf_shift_left()
161 	cbuf->start %= cbuf->maxlen;  in __cirbuf_shift_left()
177 	cbuf->start += 1;  in __cirbuf_shift_right()
178 	cbuf->start %= cbuf->maxlen;  in __cirbuf_shift_right()
190 	if (cbuf->start < cbuf->maxlen/2) {  in cirbuf_align_left()
191 		while (cbuf->start != 0) {  in cirbuf_align_left()
196 		while (cbuf->start != 0) {  in cirbuf_align_left()
211 	if (cbuf->start >= cbuf->maxlen/2) {  in cirbuf_align_right()
217 		while (cbuf->start != cbuf->maxlen-1) {  in cirbuf_align_right()
235 		cbuf->start += size - 1;  in cirbuf_del_buf_head()
236 		cbuf->start %= cbuf->maxlen;  in cirbuf_del_buf_head()
239 		cbuf->start += size;  in cirbuf_del_buf_head()
240 		cbuf->start %= cbuf->maxlen;  in cirbuf_del_buf_head()
272 		cbuf->start ++;  in __cirbuf_del_head()
273 		cbuf->start %= cbuf->maxlen;  in __cirbuf_del_head()
336 	if (cbuf->start <= cbuf->end) {  in cirbuf_get_buf_head()
337 		dprintf("s[%d] -> d[%d] (%d)\n", cbuf->start, 0, n);  in cirbuf_get_buf_head()
338 		memcpy(c, cbuf->buf + cbuf->start , n);  in cirbuf_get_buf_head()
342 		if (n <= cbuf->maxlen - cbuf->start) {  in cirbuf_get_buf_head()
343 			dprintf("s[%d] -> d[%d] (%d)\n", 0, cbuf->start, n);  in cirbuf_get_buf_head()
344 			memcpy(c, cbuf->buf + cbuf->start , n);  in cirbuf_get_buf_head()
347 			dprintf("s[%d] -> d[%d] (%d)\n", cbuf->start, 0,  in cirbuf_get_buf_head()
348 				cbuf->maxlen - cbuf->start);  in cirbuf_get_buf_head()
349 			dprintf("s[%d] -> d[%d] (%d)\n", 0, cbuf->maxlen - cbuf->start,  in cirbuf_get_buf_head()
350 				n - cbuf->maxlen + cbuf->start);  in cirbuf_get_buf_head()
351 			memcpy(c, cbuf->buf + cbuf->start , cbuf->maxlen - cbuf->start);  in cirbuf_get_buf_head()
352 			memcpy(c + cbuf->maxlen - cbuf->start, cbuf->buf,  in cirbuf_get_buf_head()
353 				   n - cbuf->maxlen + cbuf->start);  in cirbuf_get_buf_head()
374 	if (cbuf->start <= cbuf->end) {  in cirbuf_get_buf_tail()
386 				cbuf->maxlen - cbuf->start, cbuf->end + 1);  in cirbuf_get_buf_tail()
389 			memcpy(c + cbuf->maxlen - cbuf->start,  in cirbuf_get_buf_tail()
403 	return cbuf->buf[cbuf->start];  in cirbuf_get_head()