135 static uint8_t *read_head = NULL;  variable
750 		read_head = read_area;  in pcp_read()
758 	if (byte_cnt <= (read_tail - read_head)) {  in pcp_read()
759 		(void) memcpy(buf, read_head, byte_cnt);  in pcp_read()
760 		read_head += byte_cnt;  in pcp_read()
768 	for (i = 0; i < (read_tail - read_head); ++i) {  in pcp_read()
769 		read_area[i] = read_head[i];  in pcp_read()
771 	read_head = read_area;  in pcp_read()
772 	read_tail = read_head + i;  in pcp_read()
794 		m = byte_cnt - (read_tail - read_head);  in pcp_read()
805 	n = MIN(byte_cnt, (read_tail - read_head));  in pcp_read()
806 	(void) memcpy(buf, read_head, n);  in pcp_read()
808 	read_head += n;  in pcp_read()
838 		read_head = read_area;  in pcp_update_read_area()
846 	if (byte_cnt <= (read_tail - read_head)) {  in pcp_update_read_area()
854 	for (i = 0; i < (read_tail - read_head); ++i) {  in pcp_update_read_area()
855 		read_area[i] = read_head[i];  in pcp_update_read_area()
857 	read_head = read_area;  in pcp_update_read_area()
858 	read_tail = read_head + i;  in pcp_update_read_area()
860 	n = byte_cnt - (read_tail - read_head);  in pcp_update_read_area()
871 	n = MIN(byte_cnt, (read_tail - read_head));  in pcp_update_read_area()
909 	if (byte_cnt <= (read_tail - read_head)) {  in pcp_peek_read()
910 		(void) memcpy(buf, read_head, byte_cnt);  in pcp_peek_read()
919 	for (i = 0; i < (read_tail - read_head); ++i) {  in pcp_peek_read()
920 		peek_read_area[i] = read_head[i];  in pcp_peek_read()
1225 		while ((read_tail - read_head) < sizeof (host_magic_num)) {  in pcp_vldc_frame_error_handle()
1234 		if (memcmp(read_head, magic_num_buf,  in pcp_vldc_frame_error_handle()
1236 			read_head += 1;  in pcp_vldc_frame_error_handle()