qapi: Don't let implicit enum MAX member collide

Now that we guarantee the user doesn't have any enum values
beginning with a single underscore, we can use that for our
own purposes.  Renaming ENUM_MAX to ENUM__MAX makes it obvious
that the sentinel is generated.

This patch was mostly generated by applying a temporary patch:

|diff --git a/scripts/qapi.py b/scripts/qapi.py
|index e6d014b..b862ec9 100644
|--- a/scripts/qapi.py
|+++ b/scripts/qapi.py
|@@ -1570,6 +1570,7 @@ const char *const %(c_name)s_lookup[] = {
|     max_index = c_enum_const(name, 'MAX', prefix)
|     ret += mcgen('''
|     [%(max_index)s] = NULL,
|+// %(max_index)s
| };
| ''',
|                max_index=max_index)

then running:

$ cat qapi-{types,event}.c tests/test-qapi-types.c |
    sed -n 's,^// \(.*\)MAX,s|\1MAX|\1_MAX|g,p' > list
$ git grep -l _MAX | xargs sed -i -f list

The only things not generated are the changes in scripts/qapi.py.

Rejecting enum members named 'MAX' is now useless, and will be dropped
in the next patch.

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <1447836791-369-23-git-send-email-eblake@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
[Rebased to current master, commit message tweaked]
Signed-off-by: Markus Armbruster <armbru@redhat.com>

6 files changed, 9 insertions, 9 deletions

diff --git a/hw/char/escc.c b/hw/char/escc.c
index c9840e11da..b35121461a 100644
--- a/hw/char/escc.c
+++ b/hw/char/escc.c
@@ -714,7 +714,7 @@ MemoryRegion *escc_init(hwaddr base, qemu_irq irqA, qemu_irq irqB,
     return &d->mmio;
 }
 
-static const uint8_t qcode_to_keycode[Q_KEY_CODE_MAX] = {
+static const uint8_t qcode_to_keycode[Q_KEY_CODE__MAX] = {
     [Q_KEY_CODE_SHIFT]         = 99,
     [Q_KEY_CODE_SHIFT_R]       = 110,
     [Q_KEY_CODE_ALT]           = 19,
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 2e41efe1b4..abb377aab9 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -225,7 +225,7 @@ static void pc_init1(MachineState *machine,
 
     pc_vga_init(isa_bus, pci_enabled ? pci_bus : NULL);
 
-    assert(pcms->vmport != ON_OFF_AUTO_MAX);
+    assert(pcms->vmport != ON_OFF_AUTO__MAX);
     if (pcms->vmport == ON_OFF_AUTO_AUTO) {
         pcms->vmport = xen_enabled() ? ON_OFF_AUTO_OFF : ON_OFF_AUTO_ON;
     }
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 133bc68fac..9a1206832b 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -233,7 +233,7 @@ static void pc_q35_init(MachineState *machine)
 
     pc_register_ferr_irq(gsi[13]);
 
-    assert(pcms->vmport != ON_OFF_AUTO_MAX);
+    assert(pcms->vmport != ON_OFF_AUTO__MAX);
     if (pcms->vmport == ON_OFF_AUTO_AUTO) {
         pcms->vmport = xen_enabled() ? ON_OFF_AUTO_OFF : ON_OFF_AUTO_ON;
     }
diff --git a/hw/input/hid.c b/hw/input/hid.c
index e39269fc7a..12075c9f65 100644
--- a/hw/input/hid.c
+++ b/hw/input/hid.c
@@ -108,7 +108,7 @@ void hid_set_next_idle(HIDState *hs)
 static void hid_pointer_event(DeviceState *dev, QemuConsole *src,
                               InputEvent *evt)
 {
-    static const int bmap[INPUT_BUTTON_MAX] = {
+    static const int bmap[INPUT_BUTTON__MAX] = {
         [INPUT_BUTTON_LEFT]   = 0x01,
         [INPUT_BUTTON_RIGHT]  = 0x02,
         [INPUT_BUTTON_MIDDLE] = 0x04,
diff --git a/hw/input/ps2.c b/hw/input/ps2.c
index 3d6d4961db..9096d2167b 100644
--- a/hw/input/ps2.c
+++ b/hw/input/ps2.c
@@ -382,7 +382,7 @@ static void ps2_mouse_send_packet(PS2MouseState *s)
 static void ps2_mouse_event(DeviceState *dev, QemuConsole *src,
                             InputEvent *evt)
 {
-    static const int bmap[INPUT_BUTTON_MAX] = {
+    static const int bmap[INPUT_BUTTON__MAX] = {
         [INPUT_BUTTON_LEFT]   = MOUSE_EVENT_LBUTTON,
         [INPUT_BUTTON_MIDDLE] = MOUSE_EVENT_MBUTTON,
         [INPUT_BUTTON_RIGHT]  = MOUSE_EVENT_RBUTTON,
diff --git a/hw/input/virtio-input-hid.c b/hw/input/virtio-input-hid.c
index bdd479cd0a..5d00a03b0d 100644
--- a/hw/input/virtio-input-hid.c
+++ b/hw/input/virtio-input-hid.c
@@ -21,7 +21,7 @@
 
 /* ----------------------------------------------------------------- */
 
-static const unsigned int keymap_qcode[Q_KEY_CODE_MAX] = {
+static const unsigned int keymap_qcode[Q_KEY_CODE__MAX] = {
     [Q_KEY_CODE_ESC]                 = KEY_ESC,
     [Q_KEY_CODE_1]                   = KEY_1,
     [Q_KEY_CODE_2]                   = KEY_2,
@@ -138,7 +138,7 @@ static const unsigned int keymap_qcode[Q_KEY_CODE_MAX] = {
     [Q_KEY_CODE_MENU]                = KEY_MENU,
 };
 
-static const unsigned int keymap_button[INPUT_BUTTON_MAX] = {
+static const unsigned int keymap_button[INPUT_BUTTON__MAX] = {
     [INPUT_BUTTON_LEFT]              = BTN_LEFT,
     [INPUT_BUTTON_RIGHT]             = BTN_RIGHT,
     [INPUT_BUTTON_MIDDLE]            = BTN_MIDDLE,
@@ -146,12 +146,12 @@ static const unsigned int keymap_button[INPUT_BUTTON_MAX] = {
     [INPUT_BUTTON_WHEEL_DOWN]        = BTN_GEAR_DOWN,
 };
 
-static const unsigned int axismap_rel[INPUT_AXIS_MAX] = {
+static const unsigned int axismap_rel[INPUT_AXIS__MAX] = {
     [INPUT_AXIS_X]                   = REL_X,
     [INPUT_AXIS_Y]                   = REL_Y,
 };
 
-static const unsigned int axismap_abs[INPUT_AXIS_MAX] = {
+static const unsigned int axismap_abs[INPUT_AXIS__MAX] = {
     [INPUT_AXIS_X]                   = ABS_X,
     [INPUT_AXIS_Y]                   = ABS_Y,
 };