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Make the code for handling before/after SYN_DROPPED slot values more readable

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Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Peter Hutterer 2020-02-13 16:39:20 +10:00
parent ada38025a2
commit b2ec3cb7d4
1 changed files with 6 additions and 4 deletions
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10
libevdev/libevdev.c
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@ -684,17 +684,19 @@ sync_mt_state(struct libevdev *dev, int create_events)
goto out;
for (int slot = 0; slot < dev->num_slots; slot++) {
if (*slot_value(dev, slot, axis) == mt_state.val[slot])
int val_before = *slot_value(dev, slot, axis),
val_after = mt_state.val[slot];
if (val_before == val_after)
continue;
if (axis == ABS_MT_TRACKING_ID &&
*slot_value(dev, slot, axis) != -1 &&
mt_state.val[slot] != -1) {
val_before != -1 && val_after != -1) {
set_bit(tracking_id_changes, slot);
need_tracking_id_changes = 1;
}
*slot_value(dev, slot, axis) = mt_state.val[slot];
*slot_value(dev, slot, axis) = val_after;
set_bit(slot_update[slot], axis);
/* note that this slot has updates */