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n_tty: Split n_tty_receive_char()

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Factor 'special' per-char processing into standalone fn,
n_tty_receive_char_special(), which handles processing for chars
marked in the char_map.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley 2013-07-24 08:29:51 -04:00 committed by Greg Kroah-Hartman
parent 855df3c089
commit 4b1f79c2d7
1 changed files with 56 additions and 47 deletions
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103
drivers/tty/n_tty.c
View file

@ -1255,57 +1255,12 @@ n_tty_receive_signal_char(struct tty_struct *tty, int signal, unsigned char c)
* otherwise, publishes read_head via put_tty_queue()
*/
static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
static void
n_tty_receive_char_special(struct tty_struct *tty, unsigned char c)
{
struct n_tty_data *ldata = tty->disc_data;
int parmrk;
if (I_ISTRIP(tty))
c &= 0x7f;
if (I_IUCLC(tty) && L_IEXTEN(tty))
c = tolower(c);
if (L_EXTPROC(tty)) {
put_tty_queue(c, ldata);
return;
}
/*
* If the previous character was LNEXT, or we know that this
* character is not one of the characters that we'll have to
* handle specially, do shortcut processing to speed things
* up.
*/
if (!test_bit(c, ldata->char_map) || ldata->lnext) {
ldata->lnext = 0;
if (tty->stopped && !tty->flow_stopped && I_IXON(tty) &&
I_IXANY(tty)) {
start_tty(tty);
process_echoes(tty);
}
parmrk = (c == (unsigned char) '\377' && I_PARMRK(tty)) ? 1 : 0;
if (read_cnt(ldata) >= (N_TTY_BUF_SIZE - parmrk - 1)) {
/* beep if no space */
if (L_ECHO(tty))
process_output('\a', tty);
return;
}
if (L_ECHO(tty)) {
finish_erasing(ldata);
/* Record the column of first canon char. */
if (ldata->canon_head == ldata->read_head)
echo_set_canon_col(ldata);
echo_char(c, tty);
commit_echoes(tty);
}
if (parmrk)
put_tty_queue(c, ldata);
put_tty_queue(c, ldata);
return;
}
if (I_IXON(tty)) {
if (c == START_CHAR(tty)) {
start_tty(tty);
@ -1458,6 +1413,60 @@ handle_newline:
put_tty_queue(c, ldata);
}
static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
{
struct n_tty_data *ldata = tty->disc_data;
int parmrk;
if (I_ISTRIP(tty))
c &= 0x7f;
if (I_IUCLC(tty) && L_IEXTEN(tty))
c = tolower(c);
if (L_EXTPROC(tty)) {
put_tty_queue(c, ldata);
return;
}
/*
* If the previous character was LNEXT, or we know that this
* character is not one of the characters that we'll have to
* handle specially, do shortcut processing to speed things
* up.
*/
if (!test_bit(c, ldata->char_map) || ldata->lnext) {
ldata->lnext = 0;
if (tty->stopped && !tty->flow_stopped && I_IXON(tty) &&
I_IXANY(tty)) {
start_tty(tty);
process_echoes(tty);
}
parmrk = (c == (unsigned char) '\377' && I_PARMRK(tty)) ? 1 : 0;
if (read_cnt(ldata) >= (N_TTY_BUF_SIZE - parmrk - 1)) {
/* beep if no space */
if (L_ECHO(tty))
process_output('\a', tty);
return;
}
if (L_ECHO(tty)) {
finish_erasing(ldata);
/* Record the column of first canon char. */
if (ldata->canon_head == ldata->read_head)
echo_set_canon_col(ldata);
echo_char(c, tty);
commit_echoes(tty);
}
if (parmrk)
put_tty_queue(c, ldata);
put_tty_queue(c, ldata);
return;
}
n_tty_receive_char_special(tty, c);
}
static inline void
n_tty_receive_char_closing(struct tty_struct *tty, unsigned char c)
{