input: Convert to new qapi union layout

We have two issues with our qapi union layout:
1) Even though the QMP wire format spells the tag 'type', the
C code spells it 'kind', requiring some hacks in the generator.
2) The C struct uses an anonymous union, which places all tag
values in the same namespace as all non-variant members. This
leads to spurious collisions if a tag value matches a non-variant
member's name.

Make the conversion to the new layout for input-related code.

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <1445898903-12082-20-git-send-email-eblake@redhat.com>
[Commit message tweaked slightly]
Signed-off-by: Markus Armbruster <armbru@redhat.com>

1 files changed, 14 insertions, 13 deletions

diff --git a/hw/input/virtio-input-hid.c b/hw/input/virtio-input-hid.c
index 4d85dad..bdd479c 100644
--- a/hw/input/virtio-input-hid.c
+++ b/hw/input/virtio-input-hid.c
@@ -191,44 +191,45 @@ static void virtio_input_handle_event(DeviceState *dev, QemuConsole *src,
     virtio_input_event event;
     int qcode;
 
-    switch (evt->kind) {
+    switch (evt->type) {
     case INPUT_EVENT_KIND_KEY:
-        qcode = qemu_input_key_value_to_qcode(evt->key->key);
+        qcode = qemu_input_key_value_to_qcode(evt->u.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->key->down ? 1 : 0);
+            event.value = cpu_to_le32(evt->u.key->down ? 1 : 0);
             virtio_input_send(vinput, &event);
         } else {
-            if (evt->key->down) {
+            if (evt->u.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->btn->button]) {
+        if (keymap_button[evt->u.btn->button]) {
             event.type  = cpu_to_le16(EV_KEY);
-            event.code  = cpu_to_le16(keymap_button[evt->btn->button]);
-            event.value = cpu_to_le32(evt->btn->down ? 1 : 0);
+            event.code  = cpu_to_le16(keymap_button[evt->u.btn->button]);
+            event.value = cpu_to_le32(evt->u.btn->down ? 1 : 0);
             virtio_input_send(vinput, &event);
         } else {
-            if (evt->btn->down) {
+            if (evt->u.btn->down) {
                 fprintf(stderr, "%s: unmapped button: %d [%s]\n", __func__,
-                        evt->btn->button, InputButton_lookup[evt->btn->button]);
+                        evt->u.btn->button,
+                        InputButton_lookup[evt->u.btn->button]);
             }
         }
         break;
     case INPUT_EVENT_KIND_REL:
         event.type  = cpu_to_le16(EV_REL);
-        event.code  = cpu_to_le16(axismap_rel[evt->rel->axis]);
-        event.value = cpu_to_le32(evt->rel->value);
+        event.code  = cpu_to_le16(axismap_rel[evt->u.rel->axis]);
+        event.value = cpu_to_le32(evt->u.rel->value);
         virtio_input_send(vinput, &event);
         break;
     case INPUT_EVENT_KIND_ABS:
         event.type  = cpu_to_le16(EV_ABS);
-        event.code  = cpu_to_le16(axismap_abs[evt->abs->axis]);
-        event.value = cpu_to_le32(evt->abs->value);
+        event.code  = cpu_to_le16(axismap_abs[evt->u.abs->axis]);
+        event.value = cpu_to_le32(evt->u.abs->value);
         virtio_input_send(vinput, &event);
         break;
     default: