vt: refactor vc_ques to allow of other private sequences.

The vc_ques keeps track if a csi sequence is a private DEC control
function beginning with '?'. Nowadays some private control functions
begin with '>' and '='. Switch the code to instead use a new 3-bit
vc_priv that allows for all private use parameter prefixes.

Signed-off-by: Martin Hostettler <textshell@uchuujin.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index ec55336..b59feea 100644 (file)
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -1341,6 +1341,8 @@ struct vc_data *vc_deallocate(unsigned int currcons)
  *     VT102 emulator
  */
 
+enum { EPecma = 0, EPdec, EPeq, EPgt, EPlt};
+
 #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x))
 #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x))
 #define is_kbd(vc, x)  vt_get_kbd_mode_bit((vc)->vc_num, (x))
@@ -1814,7 +1816,7 @@ static void set_mode(struct vc_data *vc, int on_off)
        int i;
 
        for (i = 0; i <= vc->vc_npar; i++)
-               if (vc->vc_ques) {
+               if (vc->vc_priv == EPdec) {
                        switch(vc->vc_par[i]) { /* DEC private modes set/reset */
                        case 1:                 /* Cursor keys send ^[Ox/^[[x */
                                if (on_off)
@@ -2030,7 +2032,7 @@ static void reset_terminal(struct vc_data *vc, int do_clear)
        vc->vc_top              = 0;
        vc->vc_bottom           = vc->vc_rows;
        vc->vc_state            = ESnormal;
-       vc->vc_ques             = 0;
+       vc->vc_priv             = EPecma;
        vc->vc_translate        = set_translate(LAT1_MAP, vc);
        vc->vc_G0_charset       = LAT1_MAP;
        vc->vc_G1_charset       = GRAF_MAP;
@@ -2234,8 +2236,8 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
                        vc->vc_state=ESfunckey;
                        return;
                }
-               vc->vc_ques = (c == '?');
-               if (vc->vc_ques)
+               vc->vc_priv = (c == '?') ? EPdec : EPecma;
+               if (vc->vc_priv != EPecma)
                        return;
                /* fall through */
        case ESgetpars:
@@ -2256,7 +2258,7 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
                        set_mode(vc, 0);
                        return;
                case 'c':
-                       if (vc->vc_ques) {
+                       if (vc->vc_priv == EPdec) {
                                if (vc->vc_par[0])
                                        vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16);
                                else
@@ -2265,7 +2267,7 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
                        }
                        break;
                case 'm':
-                       if (vc->vc_ques) {
+                       if (vc->vc_priv == EPdec) {
                                clear_selection();
                                if (vc->vc_par[0])
                                        vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
@@ -2275,7 +2277,7 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
                        }
                        break;
                case 'n':
-                       if (!vc->vc_ques) {
+                       if (vc->vc_priv == EPecma) {
                                if (vc->vc_par[0] == 5)
                                        status_report(tty);
                                else if (vc->vc_par[0] == 6)
@@ -2283,8 +2285,8 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
                        }
                        return;
                }
-               if (vc->vc_ques) {
-                       vc->vc_ques = 0;
+               if (vc->vc_priv != EPecma) {
+                       vc->vc_priv = EPecma;
                        return;
                }
                switch(c) {

diff --git a/include/linux/console_struct.h b/include/linux/console_struct.h
index ab137f9..ed798e1 100644 (file)
--- a/include/linux/console_struct.h
+++ b/include/linux/console_struct.h
@@ -119,7 +119,7 @@ struct vc_data {
        unsigned int    vc_s_blink      : 1;
        unsigned int    vc_s_reverse    : 1;
        /* misc */
-       unsigned int    vc_ques         : 1;
+       unsigned int    vc_priv         : 3;
        unsigned int    vc_need_wrap    : 1;
        unsigned int    vc_can_do_color : 1;
        unsigned int    vc_report_mouse : 2;