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