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ui: Shorten references into InputEvent

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An upcoming patch will alter how simple unions, like InputEvent, are
laid out, which will impact all lines of the form 'evt->u.XXX'
(expanding it to the longer 'evt->u.XXX.data').  For better
legibility in that patch, and less need for line wrapping, it's better
to use a temporary variable to reduce the effect of a layout change to
just the variable initializations, rather than every reference within
an InputEvent.

There was one instance in hid.c:hid_pointer_event() where the code
was referring to evt->u.rel inside the case label where evt->u.abs
is the correct name; thankfully, both members of the union have the
same type, so it happened to work, but it is now cleaner.

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <1457021813-10704-8-git-send-email-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
This commit is contained in:
Eric Blake
2016-03-03 09:16:49 -07:00
committed by Markus Armbruster
parent 0399293e5b
commit b5a1b44318
7 changed files with 129 additions and 89 deletions
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33
hw/input/virtio-input-hid.c
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@@ -191,46 +191,53 @@ static void virtio_input_handle_event(DeviceState *dev, QemuConsole *src,
VirtIOInput *vinput = VIRTIO_INPUT(dev);
virtio_input_event event;
int qcode;
InputKeyEvent *key;
InputMoveEvent *move;
InputBtnEvent *btn;
switch (evt->type) {
case INPUT_EVENT_KIND_KEY:
qcode = qemu_input_key_value_to_qcode(evt->u.key->key);
key = evt->u.key;
qcode = qemu_input_key_value_to_qcode(key->key);
if (qcode && keymap_qcode[qcode]) {
event.type = cpu_to_le16(EV_KEY);
event.code = cpu_to_le16(keymap_qcode[qcode]);
event.value = cpu_to_le32(evt->u.key->down ? 1 : 0);
event.value = cpu_to_le32(key->down ? 1 : 0);
virtio_input_send(vinput, &event);
} else {
if (evt->u.key->down) {
if (key->down) {
fprintf(stderr, "%s: unmapped key: %d [%s]\n", __func__,
qcode, QKeyCode_lookup[qcode]);
}
}
break;
case INPUT_EVENT_KIND_BTN:
if (keymap_button[evt->u.btn->button]) {
btn = evt->u.btn;
if (keymap_button[btn->button]) {
event.type = cpu_to_le16(EV_KEY);
event.code = cpu_to_le16(keymap_button[evt->u.btn->button]);
event.value = cpu_to_le32(evt->u.btn->down ? 1 : 0);
event.code = cpu_to_le16(keymap_button[btn->button]);
event.value = cpu_to_le32(btn->down ? 1 : 0);
virtio_input_send(vinput, &event);
} else {
if (evt->u.btn->down) {
if (btn->down) {
fprintf(stderr, "%s: unmapped button: %d [%s]\n", __func__,
evt->u.btn->button,
InputButton_lookup[evt->u.btn->button]);
btn->button,
InputButton_lookup[btn->button]);
}
}
break;
case INPUT_EVENT_KIND_REL:
move = evt->u.rel;
event.type = cpu_to_le16(EV_REL);
event.code = cpu_to_le16(axismap_rel[evt->u.rel->axis]);
event.value = cpu_to_le32(evt->u.rel->value);
event.code = cpu_to_le16(axismap_rel[move->axis]);
event.value = cpu_to_le32(move->value);
virtio_input_send(vinput, &event);
break;
case INPUT_EVENT_KIND_ABS:
move = evt->u.abs;
event.type = cpu_to_le16(EV_ABS);
event.code = cpu_to_le16(axismap_abs[evt->u.abs->axis]);
event.value = cpu_to_le32(evt->u.abs->value);
event.code = cpu_to_le16(axismap_abs[move->axis]);
event.value = cpu_to_le32(move->value);
virtio_input_send(vinput, &event);
break;
default: