1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_TTY_FLIP_H
3 #define _LINUX_TTY_FLIP_H
4
5 #include <linux/tty_buffer.h>
6 #include <linux/tty_port.h>
7
8 struct tty_ldisc;
9
10 int tty_buffer_set_limit(struct tty_port *port, int limit);
11 unsigned int tty_buffer_space_avail(struct tty_port *port);
12 int tty_buffer_request_room(struct tty_port *port, size_t size);
13 int tty_insert_flip_string_flags(struct tty_port *port,
14 const unsigned char *chars, const char *flags, size_t size);
15 int tty_insert_flip_string_fixed_flag(struct tty_port *port,
16 const unsigned char *chars, char flag, size_t size);
17 int tty_prepare_flip_string(struct tty_port *port, unsigned char **chars,
18 size_t size);
19 void tty_flip_buffer_push(struct tty_port *port);
20 void tty_schedule_flip(struct tty_port *port);
21 int __tty_insert_flip_char(struct tty_port *port, unsigned char ch, char flag);
22
tty_insert_flip_char(struct tty_port * port,unsigned char ch,char flag)23 static inline int tty_insert_flip_char(struct tty_port *port,
24 unsigned char ch, char flag)
25 {
26 struct tty_buffer *tb = port->buf.tail;
27 int change;
28
29 change = (tb->flags & TTYB_NORMAL) && (flag != TTY_NORMAL);
30 if (!change && tb->used < tb->size) {
31 if (~tb->flags & TTYB_NORMAL)
32 *flag_buf_ptr(tb, tb->used) = flag;
33 *char_buf_ptr(tb, tb->used++) = ch;
34 return 1;
35 }
36 return __tty_insert_flip_char(port, ch, flag);
37 }
38
tty_insert_flip_string(struct tty_port * port,const unsigned char * chars,size_t size)39 static inline int tty_insert_flip_string(struct tty_port *port,
40 const unsigned char *chars, size_t size)
41 {
42 return tty_insert_flip_string_fixed_flag(port, chars, TTY_NORMAL, size);
43 }
44
45 int tty_ldisc_receive_buf(struct tty_ldisc *ld, const unsigned char *p,
46 const char *f, int count);
47
48 void tty_buffer_lock_exclusive(struct tty_port *port);
49 void tty_buffer_unlock_exclusive(struct tty_port *port);
50
51 #endif /* _LINUX_TTY_FLIP_H */
52