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ui/curses.c: Clean up nextchr logic 

Coverity identifies that at the top of the while(1) loop
in curses_refresh() the variable nextchr is always ERR,
and so the else case of the first if() is dead code.
Remove this dead code, and narrow the scope of the
nextchr variable to the place where it's used.

(This confused logic has been present since the curses
code was added to QEMU in 2008.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1470925407-23850-3-git-send-email-peter.maydell@linaro.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Peter Maydell 2016-08-11 15:23:27 +01:00 committed by Gerd Hoffmann
parent bba4e1b591
commit 99a9ef44dc
1 changed files with 4 additions and 11 deletions
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15
ui/curses.c
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@ -181,7 +181,7 @@ static kbd_layout_t *kbd_layout = NULL;
static void curses_refresh(DisplayChangeListener *dcl)
{
int chr, nextchr, keysym, keycode, keycode_alt;
int chr, keysym, keycode, keycode_alt;
curses_winch_check();
@ -195,15 +195,9 @@ static void curses_refresh(DisplayChangeListener *dcl)
graphic_hw_text_update(NULL, screen);
nextchr = ERR;
while (1) {
/* while there are any pending key strokes to process */
if (nextchr == ERR)
chr = getch();
else {
chr = nextchr;
nextchr = ERR;
}
chr = getch();
if (chr == ERR)
break;
@ -224,13 +218,12 @@ static void curses_refresh(DisplayChangeListener *dcl)
/* alt key */
if (keycode == 1) {
nextchr = getch();
int nextchr = getch();
if (nextchr != ERR) {
chr = nextchr;
keycode_alt = ALT;
keycode = curses2keycode[nextchr];
nextchr = ERR;
keycode = curses2keycode[chr];
if (keycode != -1) {
keycode |= ALT;