#ifndef _LINUX_TTY_FLIP_H
  #define _LINUX_TTY_FLIP_H

  extern int tty_buffer_request_room(struct tty_struct *tty, size_t size);

  extern int tty_insert_flip_string_flags(struct tty_struct *tty, const unsigned char *chars, const char *flags, size_t size);

  extern int tty_insert_flip_string_fixed_flag(struct tty_struct *tty, const unsigned char *chars, char flag, size_t size);

  extern int tty_prepare_flip_string(struct tty_struct *tty, unsigned char **chars, size_t size);
  extern int tty_prepare_flip_string_flags(struct tty_struct *tty, unsigned char **chars, char **flags, size_t size);

  void tty_schedule_flip(struct tty_struct *tty);

  static inline int tty_insert_flip_char(struct tty_struct *tty,

  					unsigned char ch, char flag)

  {

  	struct tty_buffer *tb = tty->buf.tail;

  	if (tb && tb->used < tb->size) {

  		tb->flag_buf_ptr[tb->used] = flag;
  		tb->char_buf_ptr[tb->used++] = ch;
  		return 1;

  	}

  	return tty_insert_flip_string_flags(tty, &ch, &flag, 1);

  }

  static inline int tty_insert_flip_string(struct tty_struct *tty, const unsigned char *chars, size_t size)
  {
  	return tty_insert_flip_string_fixed_flag(tty, chars, TTY_NORMAL, size);
  }

  #endif /* _LINUX_TTY_FLIP_H */