1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef _LINUX_TTY_FLIP_H
3*4882a593Smuzhiyun #define _LINUX_TTY_FLIP_H
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun extern int tty_buffer_set_limit(struct tty_port *port, int limit);
6*4882a593Smuzhiyun extern int tty_buffer_space_avail(struct tty_port *port);
7*4882a593Smuzhiyun extern int tty_buffer_request_room(struct tty_port *port, size_t size);
8*4882a593Smuzhiyun extern int tty_insert_flip_string_flags(struct tty_port *port,
9*4882a593Smuzhiyun const unsigned char *chars, const char *flags, size_t size);
10*4882a593Smuzhiyun extern int tty_insert_flip_string_fixed_flag(struct tty_port *port,
11*4882a593Smuzhiyun const unsigned char *chars, char flag, size_t size);
12*4882a593Smuzhiyun extern int tty_prepare_flip_string(struct tty_port *port,
13*4882a593Smuzhiyun unsigned char **chars, size_t size);
14*4882a593Smuzhiyun extern void tty_flip_buffer_push(struct tty_port *port);
15*4882a593Smuzhiyun int __tty_insert_flip_char(struct tty_port *port, unsigned char ch, char flag);
16*4882a593Smuzhiyun
tty_insert_flip_char(struct tty_port * port,unsigned char ch,char flag)17*4882a593Smuzhiyun static inline int tty_insert_flip_char(struct tty_port *port,
18*4882a593Smuzhiyun unsigned char ch, char flag)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun struct tty_buffer *tb = port->buf.tail;
21*4882a593Smuzhiyun int change;
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun change = (tb->flags & TTYB_NORMAL) && (flag != TTY_NORMAL);
24*4882a593Smuzhiyun if (!change && tb->used < tb->size) {
25*4882a593Smuzhiyun if (~tb->flags & TTYB_NORMAL)
26*4882a593Smuzhiyun *flag_buf_ptr(tb, tb->used) = flag;
27*4882a593Smuzhiyun *char_buf_ptr(tb, tb->used++) = ch;
28*4882a593Smuzhiyun return 1;
29*4882a593Smuzhiyun }
30*4882a593Smuzhiyun return __tty_insert_flip_char(port, ch, flag);
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun
tty_insert_flip_string(struct tty_port * port,const unsigned char * chars,size_t size)33*4882a593Smuzhiyun static inline int tty_insert_flip_string(struct tty_port *port,
34*4882a593Smuzhiyun const unsigned char *chars, size_t size)
35*4882a593Smuzhiyun {
36*4882a593Smuzhiyun return tty_insert_flip_string_fixed_flag(port, chars, TTY_NORMAL, size);
37*4882a593Smuzhiyun }
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun extern void tty_buffer_lock_exclusive(struct tty_port *port);
40*4882a593Smuzhiyun extern void tty_buffer_unlock_exclusive(struct tty_port *port);
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun int tty_insert_flip_string_and_push_buffer(struct tty_port *port,
43*4882a593Smuzhiyun const unsigned char *chars, size_t cnt);
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun #endif /* _LINUX_TTY_FLIP_H */
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