qapi: Change munging of CamelCase enum values

When munging enum values, the fact that we were passing the entire
prefix + value through camel_to_upper() meant that enum values
spelled with CamelCase could be turned into CAMEL_CASE.  However,
this provides a potential collision (both OneTwo and One-Two would
munge into ONE_TWO) for enum types, when the same two names are
valid side-by-side as QAPI member names.  By changing the generation
of enum constants to always be prefix + '_' + c_name(value,
False).upper(), and ensuring that there are no case collisions (in
the next patches), we no longer have to worry about names that
would be distinct as QAPI members but collide as variant tag names,
without having to think about what munging the heuristics in
camel_to_upper() will actually perform on an enum value.

Making the change will affect enums that did not follow coding
conventions, using 'CamelCase' rather than desired 'lower-case'.

Thankfully, there are only two culprits: InputButton and ErrorClass.
We already tweaked ErrorClass to make it an alias of QapiErrorClass,
where only the alias needs changing rather than the whole tree.  So
the bulk of this change is modifying INPUT_BUTTON_WHEEL_UP to the
new INPUT_BUTTON_WHEELUP (and likewise for WHEELDOWN).  That part
of this commit may later need reverting if we rename the enum
constants from 'WheelUp' to 'wheel-up' as part of moving
x-input-send-event to a stable interface; but at least we have
documentation bread crumbs in place to remind us (commit 513e7cd),
and it matches the fact that SDL constants are also spelled
SDL_BUTTON_WHEELUP.

Suggested by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <1447836791-369-27-git-send-email-eblake@redhat.com>
[Commit message tweaked]
Signed-off-by: Markus Armbruster <armbru@redhat.com>

hw/input/hid.c

@@ -139,9 +139,9 @@ static void hid_pointer_event(DeviceState *dev, QemuConsole *src,
     case INPUT_EVENT_KIND_BTN:
         if (evt->u.btn->down) {
             e->buttons_state |= bmap[evt->u.btn->button];
-            if (evt->u.btn->button == INPUT_BUTTON_WHEEL_UP) {
+            if (evt->u.btn->button == INPUT_BUTTON_WHEELUP) {
                 e->dz--;
-            } else if (evt->u.btn->button == INPUT_BUTTON_WHEEL_DOWN) {
+            } else if (evt->u.btn->button == INPUT_BUTTON_WHEELDOWN) {
                 e->dz++;
             }
         } else {

hw/input/ps2.c

@@ -405,9 +405,9 @@ static void ps2_mouse_event(DeviceState *dev, QemuConsole *src,
     case INPUT_EVENT_KIND_BTN:
         if (evt->u.btn->down) {
             s->mouse_buttons |= bmap[evt->u.btn->button];
-            if (evt->u.btn->button == INPUT_BUTTON_WHEEL_UP) {
+            if (evt->u.btn->button == INPUT_BUTTON_WHEELUP) {
                 s->mouse_dz--;
-            } else if (evt->u.btn->button == INPUT_BUTTON_WHEEL_DOWN) {
+            } else if (evt->u.btn->button == INPUT_BUTTON_WHEELDOWN) {
                 s->mouse_dz++;
             }
         } else {

hw/input/virtio-input-hid.c

@@ -142,8 +142,8 @@ static const unsigned int keymap_button[INPUT_BUTTON__MAX] = {
     [INPUT_BUTTON_LEFT]              = BTN_LEFT,
     [INPUT_BUTTON_RIGHT]             = BTN_RIGHT,
     [INPUT_BUTTON_MIDDLE]            = BTN_MIDDLE,
-    [INPUT_BUTTON_WHEEL_UP]          = BTN_GEAR_UP,
-    [INPUT_BUTTON_WHEEL_DOWN]        = BTN_GEAR_DOWN,
+    [INPUT_BUTTON_WHEELUP]           = BTN_GEAR_UP,
+    [INPUT_BUTTON_WHEELDOWN]         = BTN_GEAR_DOWN,
 };
 
 static const unsigned int axismap_rel[INPUT_AXIS__MAX] = {

include/qapi/error.h

@@ -96,12 +96,12 @@ typedef struct Error Error;
  * enum names.
  */
 typedef enum ErrorClass {
-    ERROR_CLASS_GENERIC_ERROR = QAPI_ERROR_CLASS_GENERIC_ERROR,
-    ERROR_CLASS_COMMAND_NOT_FOUND = QAPI_ERROR_CLASS_COMMAND_NOT_FOUND,
-    ERROR_CLASS_DEVICE_ENCRYPTED = QAPI_ERROR_CLASS_DEVICE_ENCRYPTED,
-    ERROR_CLASS_DEVICE_NOT_ACTIVE = QAPI_ERROR_CLASS_DEVICE_NOT_ACTIVE,
-    ERROR_CLASS_DEVICE_NOT_FOUND = QAPI_ERROR_CLASS_DEVICE_NOT_FOUND,
-    ERROR_CLASS_KVM_MISSING_CAP = QAPI_ERROR_CLASS_KVM_MISSING_CAP,
+    ERROR_CLASS_GENERIC_ERROR = QAPI_ERROR_CLASS_GENERICERROR,
+    ERROR_CLASS_COMMAND_NOT_FOUND = QAPI_ERROR_CLASS_COMMANDNOTFOUND,
+    ERROR_CLASS_DEVICE_ENCRYPTED = QAPI_ERROR_CLASS_DEVICEENCRYPTED,
+    ERROR_CLASS_DEVICE_NOT_ACTIVE = QAPI_ERROR_CLASS_DEVICENOTACTIVE,
+    ERROR_CLASS_DEVICE_NOT_FOUND = QAPI_ERROR_CLASS_DEVICENOTFOUND,
+    ERROR_CLASS_KVM_MISSING_CAP = QAPI_ERROR_CLASS_KVMMISSINGCAP,
 } ErrorClass;
 
 /*

monitor.c

@@ -1375,7 +1375,7 @@ static void hmp_mouse_move(Monitor *mon, const QDict *qdict)
     if (dz_str) {
         dz = strtol(dz_str, NULL, 0);
         if (dz != 0) {
-            button = (dz > 0) ? INPUT_BUTTON_WHEEL_UP : INPUT_BUTTON_WHEEL_DOWN;
+            button = (dz > 0) ? INPUT_BUTTON_WHEELUP : INPUT_BUTTON_WHEELDOWN;
             qemu_input_queue_btn(NULL, button, true);
             qemu_input_event_sync();
             qemu_input_queue_btn(NULL, button, false);

scripts/qapi.py

@@ -1440,7 +1440,7 @@ def camel_to_upper(value):
 def c_enum_const(type_name, const_name, prefix=None):
     if prefix is not None:
         type_name = prefix
-    return camel_to_upper(type_name + '_' + const_name)
+    return camel_to_upper(type_name) + '_' + c_name(const_name, False).upper()
 
 c_name_trans = string.maketrans('.-', '__')
 

ui/cocoa.m

@@ -737,8 +737,8 @@ - (void) handleEvent:(NSEvent *)event
                 [INPUT_BUTTON_LEFT]       = MOUSE_EVENT_LBUTTON,
                 [INPUT_BUTTON_MIDDLE]     = MOUSE_EVENT_MBUTTON,
                 [INPUT_BUTTON_RIGHT]      = MOUSE_EVENT_RBUTTON,
-                [INPUT_BUTTON_WHEEL_UP]   = MOUSE_EVENT_WHEELUP,
-                [INPUT_BUTTON_WHEEL_DOWN] = MOUSE_EVENT_WHEELDN,
+                [INPUT_BUTTON_WHEELUP]    = MOUSE_EVENT_WHEELUP,
+                [INPUT_BUTTON_WHEELDOWN]  = MOUSE_EVENT_WHEELDN,
             };
             qemu_input_update_buttons(dcl->con, bmap, last_buttons, buttons);
             last_buttons = buttons;

ui/gtk.c

@@ -965,9 +965,9 @@ static gboolean gd_scroll_event(GtkWidget *widget, GdkEventScroll *scroll,
     InputButton btn;
 
     if (scroll->direction == GDK_SCROLL_UP) {
-        btn = INPUT_BUTTON_WHEEL_UP;
+        btn = INPUT_BUTTON_WHEELUP;
     } else if (scroll->direction == GDK_SCROLL_DOWN) {
-        btn = INPUT_BUTTON_WHEEL_DOWN;
+        btn = INPUT_BUTTON_WHEELDOWN;
     } else {
         return TRUE;
     }

ui/input-legacy.c

@@ -157,7 +157,7 @@ static void legacy_mouse_event(DeviceState *dev, QemuConsole *src,
         } else {
             s->buttons &= ~bmap[evt->u.btn->button];
         }
-        if (evt->u.btn->down && evt->u.btn->button == INPUT_BUTTON_WHEEL_UP) {
+        if (evt->u.btn->down && evt->u.btn->button == INPUT_BUTTON_WHEELUP) {
             s->qemu_put_mouse_event(s->qemu_put_mouse_event_opaque,
                                     s->axis[INPUT_AXIS_X],
                                     s->axis[INPUT_AXIS_Y],
@@ -165,7 +165,7 @@ static void legacy_mouse_event(DeviceState *dev, QemuConsole *src,
                                     s->buttons);
         }
         if (evt->u.btn->down &&
-            evt->u.btn->button == INPUT_BUTTON_WHEEL_DOWN) {
+            evt->u.btn->button == INPUT_BUTTON_WHEELDOWN) {
             s->qemu_put_mouse_event(s->qemu_put_mouse_event_opaque,
                                     s->axis[INPUT_AXIS_X],
                                     s->axis[INPUT_AXIS_Y],

ui/sdl.c

@@ -469,8 +469,8 @@ static void sdl_send_mouse_event(int dx, int dy, int x, int y, int state)
         [INPUT_BUTTON_LEFT]       = SDL_BUTTON(SDL_BUTTON_LEFT),
         [INPUT_BUTTON_MIDDLE]     = SDL_BUTTON(SDL_BUTTON_MIDDLE),
         [INPUT_BUTTON_RIGHT]      = SDL_BUTTON(SDL_BUTTON_RIGHT),
-        [INPUT_BUTTON_WHEEL_UP]   = SDL_BUTTON(SDL_BUTTON_WHEELUP),
-        [INPUT_BUTTON_WHEEL_DOWN] = SDL_BUTTON(SDL_BUTTON_WHEELDOWN),
+        [INPUT_BUTTON_WHEELUP]    = SDL_BUTTON(SDL_BUTTON_WHEELUP),
+        [INPUT_BUTTON_WHEELDOWN]  = SDL_BUTTON(SDL_BUTTON_WHEELDOWN),
     };
     static uint32_t prev_state;
 

ui/sdl2.c

@@ -504,9 +504,9 @@ static void handle_mousewheel(SDL_Event *ev)
     InputButton btn;
 
     if (wev->y > 0) {
-        btn = INPUT_BUTTON_WHEEL_UP;
+        btn = INPUT_BUTTON_WHEELUP;
     } else if (wev->y < 0) {
-        btn = INPUT_BUTTON_WHEEL_DOWN;
+        btn = INPUT_BUTTON_WHEELDOWN;
     } else {
         return;
     }

ui/spice-input.c

@@ -111,8 +111,8 @@ static void spice_update_buttons(QemuSpicePointer *pointer,
         [INPUT_BUTTON_LEFT]        = 0x01,
         [INPUT_BUTTON_MIDDLE]      = 0x04,
         [INPUT_BUTTON_RIGHT]       = 0x02,
-        [INPUT_BUTTON_WHEEL_UP]    = 0x10,
-        [INPUT_BUTTON_WHEEL_DOWN]  = 0x20,
+        [INPUT_BUTTON_WHEELUP]     = 0x10,
+        [INPUT_BUTTON_WHEELDOWN]   = 0x20,
     };
 
     if (wheel < 0) {

ui/vnc.c

@@ -1680,8 +1680,8 @@ static void pointer_event(VncState *vs, int button_mask, int x, int y)
         [INPUT_BUTTON_LEFT]       = 0x01,
         [INPUT_BUTTON_MIDDLE]     = 0x02,
         [INPUT_BUTTON_RIGHT]      = 0x04,
-        [INPUT_BUTTON_WHEEL_UP]   = 0x08,
-        [INPUT_BUTTON_WHEEL_DOWN] = 0x10,
+        [INPUT_BUTTON_WHEELUP]    = 0x08,
+        [INPUT_BUTTON_WHEELDOWN]  = 0x10,
     };
     QemuConsole *con = vs->vd->dcl.con;
     int width = pixman_image_get_width(vs->vd->server);