93 lines
2.7 KiB
C
93 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_TTY_FLIP_H
|
|
#define _LINUX_TTY_FLIP_H
|
|
|
|
#include <linux/tty_buffer.h>
|
|
#include <linux/tty_port.h>
|
|
|
|
struct tty_ldisc;
|
|
|
|
int tty_buffer_set_limit(struct tty_port *port, int limit);
|
|
unsigned int tty_buffer_space_avail(struct tty_port *port);
|
|
int tty_buffer_request_room(struct tty_port *port, size_t size);
|
|
size_t __tty_insert_flip_string_flags(struct tty_port *port, const u8 *chars,
|
|
const u8 *flags, bool mutable_flags,
|
|
size_t size);
|
|
size_t tty_prepare_flip_string(struct tty_port *port, u8 **chars, size_t size);
|
|
void tty_flip_buffer_push(struct tty_port *port);
|
|
|
|
/**
|
|
* tty_insert_flip_string_fixed_flag - add characters to the tty buffer
|
|
* @port: tty port
|
|
* @chars: characters
|
|
* @flag: flag value for each character
|
|
* @size: size
|
|
*
|
|
* Queue a series of bytes to the tty buffering. All the characters passed are
|
|
* marked with the supplied flag.
|
|
*
|
|
* Returns: the number added.
|
|
*/
|
|
static inline size_t tty_insert_flip_string_fixed_flag(struct tty_port *port,
|
|
const u8 *chars, u8 flag,
|
|
size_t size)
|
|
{
|
|
return __tty_insert_flip_string_flags(port, chars, &flag, false, size);
|
|
}
|
|
|
|
/**
|
|
* tty_insert_flip_string_flags - add characters to the tty buffer
|
|
* @port: tty port
|
|
* @chars: characters
|
|
* @flags: flag bytes
|
|
* @size: size
|
|
*
|
|
* Queue a series of bytes to the tty buffering. For each character the flags
|
|
* array indicates the status of the character.
|
|
*
|
|
* Returns: the number added.
|
|
*/
|
|
static inline size_t tty_insert_flip_string_flags(struct tty_port *port,
|
|
const u8 *chars,
|
|
const u8 *flags, size_t size)
|
|
{
|
|
return __tty_insert_flip_string_flags(port, chars, flags, true, size);
|
|
}
|
|
|
|
/**
|
|
* tty_insert_flip_char - add one character to the tty buffer
|
|
* @port: tty port
|
|
* @ch: character
|
|
* @flag: flag byte
|
|
*
|
|
* Queue a single byte @ch to the tty buffering, with an optional flag.
|
|
*/
|
|
static inline size_t tty_insert_flip_char(struct tty_port *port, u8 ch, u8 flag)
|
|
{
|
|
struct tty_buffer *tb = port->buf.tail;
|
|
int change;
|
|
|
|
change = !tb->flags && (flag != TTY_NORMAL);
|
|
if (!change && tb->used < tb->size) {
|
|
if (tb->flags)
|
|
*flag_buf_ptr(tb, tb->used) = flag;
|
|
*char_buf_ptr(tb, tb->used++) = ch;
|
|
return 1;
|
|
}
|
|
return __tty_insert_flip_string_flags(port, &ch, &flag, false, 1);
|
|
}
|
|
|
|
static inline size_t tty_insert_flip_string(struct tty_port *port,
|
|
const u8 *chars, size_t size)
|
|
{
|
|
return tty_insert_flip_string_fixed_flag(port, chars, TTY_NORMAL, size);
|
|
}
|
|
|
|
size_t tty_ldisc_receive_buf(struct tty_ldisc *ld, const u8 *p, const u8 *f,
|
|
size_t count);
|
|
|
|
void tty_buffer_lock_exclusive(struct tty_port *port);
|
|
void tty_buffer_unlock_exclusive(struct tty_port *port);
|
|
|
|
#endif /* _LINUX_TTY_FLIP_H */
|