action: get rid of xkb_any_action

And use union xkb_action instead. We add xkb_private_action, which is
the same as xkb_any_action, but only used where the intention is clear.
This should take care of whatever sizing changes the action struct might
have.

Signed-off-by: Ran Benita <ran234@gmail.com>

6 files changed, 63 insertions, 82 deletions

diff --git a/src/keymap-dump.c b/src/keymap-dump.c
index f04f6cc..f406f31 100644
--- a/src/keymap-dump.c
+++ b/src/keymap-dump.c
@@ -397,9 +397,9 @@ write_action(struct xkb_keymap *keymap, struct buf *buf,
     if (!suffix)
         suffix = "";
 
-    type = ActionTypeText(action->any.type);
+    type = ActionTypeText(action->type);
 
-    switch (action->any.type) {
+    switch (action->type) {
     case XkbSA_SetMods:
     case XkbSA_LatchMods:
     case XkbSA_LockMods:
@@ -408,10 +408,10 @@ write_action(struct xkb_keymap *keymap, struct buf *buf,
         else
             args = VModMaskText(keymap, action->mods.mods.mods);
         write_buf(buf, "%s%s(modifiers=%s%s%s)%s", prefix, type, args,
-                  (action->any.type != XkbSA_LockGroup &&
+                  (action->type != XkbSA_LockGroup &&
                    (action->mods.flags & XkbSA_ClearLocks)) ?
                    ",clearLocks" : "",
-                  (action->any.type != XkbSA_LockGroup &&
+                  (action->type != XkbSA_LockGroup &&
                    (action->mods.flags & XkbSA_LatchToLock)) ?
                    ",latchToLock" : "",
                   suffix);
@@ -425,10 +425,10 @@ write_action(struct xkb_keymap *keymap, struct buf *buf,
                    action->group.group > 0) ? "+" : "",
                   (action->group.flags & XkbSA_GroupAbsolute) ?
                   action->group.group + 1 : action->group.group,
-                  (action->any.type != XkbSA_LockGroup &&
+                  (action->type != XkbSA_LockGroup &&
                    (action->group.flags & XkbSA_ClearLocks)) ?
                   ",clearLocks" : "",
-                  (action->any.type != XkbSA_LockGroup &&
+                  (action->type != XkbSA_LockGroup &&
                    (action->group.flags & XkbSA_LatchToLock)) ?
                   ",latchToLock" : "",
                   suffix);
@@ -521,10 +521,10 @@ write_action(struct xkb_keymap *keymap, struct buf *buf,
     default:
         write_buf(buf,
                   "%s%s(type=0x%02x,data[0]=0x%02x,data[1]=0x%02x,data[2]=0x%02x,data[3]=0x%02x,data[4]=0x%02x,data[5]=0x%02x,data[6]=0x%02x)%s",
-                  prefix, type, action->any.type, action->any.data[0],
-                  action->any.data[1], action->any.data[2],
-                  action->any.data[3], action->any.data[4],
-                  action->any.data[5], action->any.data[6],
+                  prefix, type, action->type, action->priv.data[0],
+                  action->priv.data[1], action->priv.data[2],
+                  action->priv.data[3], action->priv.data[4],
+                  action->priv.data[5], action->priv.data[6],
                   suffix);
         break;
     }
diff --git a/src/xkb-priv.h b/src/xkb-priv.h
index f53805f..61ba590 100644
--- a/src/xkb-priv.h
+++ b/src/xkb-priv.h
@@ -148,11 +148,6 @@ struct xkb_mods {
     xkb_mod_mask_t mask;       /* computed effective mask */
 };
 
-struct xkb_any_action {
-    uint8_t type;
-    uint8_t data[7];
-};
-
 struct xkb_mod_action {
     uint8_t type;
     uint8_t flags;
@@ -240,8 +235,12 @@ struct xkb_pointer_button_action {
     int8_t button;
 };
 
+struct xkb_private_action {
+    uint8_t type;
+    uint8_t data[7];
+};
+
 union xkb_action {
-    struct xkb_any_action any;
     struct xkb_mod_action mods;
     struct xkb_group_action group;
     struct xkb_iso_action iso;
@@ -254,6 +253,7 @@ union xkb_action {
     struct xkb_pointer_action ptr;         /* XXX delete for DeviceValuator */
     struct xkb_pointer_button_action btn;  /* XXX delete for DeviceBtn */
     struct xkb_message_action msg;         /* XXX just delete */
+    struct xkb_private_action priv;
     unsigned char type;
 };
 
diff --git a/src/xkbcomp/action.c b/src/xkbcomp/action.c
index a2dd9ed..0d37688 100644
--- a/src/xkbcomp/action.c
+++ b/src/xkbcomp/action.c
@@ -219,7 +219,7 @@ ReportNotFound(struct xkb_keymap *keymap, unsigned action, unsigned field,
 }
 
 static bool
-HandleNoAction(struct xkb_keymap *keymap, struct xkb_any_action *action,
+HandleNoAction(struct xkb_keymap *keymap, union xkb_action *action,
                unsigned field, const ExprDef *array_ndx, const ExprDef *value)
 
 {
@@ -277,16 +277,15 @@ CheckModifierField(struct xkb_keymap *keymap, unsigned action,
 }
 
 static bool
-HandleSetLatchMods(struct xkb_keymap *keymap, struct xkb_any_action *action,
+HandleSetLatchMods(struct xkb_keymap *keymap, union xkb_action *action,
                    unsigned field, const ExprDef *array_ndx,
                    const ExprDef *value)
 {
-    struct xkb_mod_action *act;
+    struct xkb_mod_action *act = &action->mods;
     unsigned rtrn;
     unsigned t1;
     xkb_mod_mask_t t2;
 
-    act = (struct xkb_mod_action *) action;
     if (array_ndx != NULL) {
         switch (field) {
         case F_ClearLocks:
@@ -318,14 +317,13 @@ HandleSetLatchMods(struct xkb_keymap *keymap, struct xkb_any_action *action,
 }
 
 static bool
-HandleLockMods(struct xkb_keymap *keymap, struct xkb_any_action *action,
+HandleLockMods(struct xkb_keymap *keymap, union xkb_action *action,
                unsigned field, const ExprDef *array_ndx, const ExprDef *value)
 {
-    struct xkb_mod_action *act;
+    struct xkb_mod_action *act = &action->mods;
     unsigned t1;
     xkb_mod_mask_t t2;
 
-    act = (struct xkb_mod_action *) action;
     if ((array_ndx != NULL) && (field == F_Modifiers))
         return ReportActionNotArray(keymap, action->type, field);
     switch (field) {
@@ -370,16 +368,15 @@ CheckGroupField(struct xkb_keymap *keymap, unsigned action,
 }
 
 static bool
-HandleSetLatchGroup(struct xkb_keymap *keymap, struct xkb_any_action *action,
+HandleSetLatchGroup(struct xkb_keymap *keymap, union xkb_action *action,
                     unsigned field, const ExprDef *array_ndx,
                     const ExprDef *value)
 {
-    struct xkb_group_action *act;
+    struct xkb_group_action *act = &action->group;
     unsigned rtrn;
     unsigned t1;
     xkb_group_index_t t2;
 
-    act = (struct xkb_group_action *) action;
     if (array_ndx != NULL) {
         switch (field) {
         case F_ClearLocks:
@@ -411,15 +408,14 @@ HandleSetLatchGroup(struct xkb_keymap *keymap, struct xkb_any_action *action,
 }
 
 static bool
-HandleLockGroup(struct xkb_keymap *keymap, struct xkb_any_action *action,
+HandleLockGroup(struct xkb_keymap *keymap, union xkb_action *action,
                 unsigned field, const ExprDef *array_ndx,
                 const ExprDef *value)
 {
-    struct xkb_group_action *act;
+    struct xkb_group_action *act = &action->group;
     unsigned t1;
     xkb_group_index_t t2;
 
-    act = (struct xkb_group_action *) action;
     if ((array_ndx != NULL) && (field == F_Group))
         return ReportActionNotArray(keymap, action->type, field);
     if (field == F_Group) {
@@ -435,13 +431,12 @@ HandleLockGroup(struct xkb_keymap *keymap, struct xkb_any_action *action,
 }
 
 static bool
-HandleMovePtr(struct xkb_keymap *keymap, struct xkb_any_action *action,
+HandleMovePtr(struct xkb_keymap *keymap, union xkb_action *action,
               unsigned field, const ExprDef *array_ndx, const ExprDef *value)
 {
-    struct xkb_pointer_action *act;
+    struct xkb_pointer_action *act = &action->ptr;
     bool absolute;
 
-    act = (struct xkb_pointer_action *) action;
     if ((array_ndx != NULL) && ((field == F_X) || (field == F_Y)))
         return ReportActionNotArray(keymap, action->type, field);
 
@@ -493,12 +488,11 @@ static const LookupEntry lockWhich[] = {
 };
 
 static bool
-HandlePtrBtn(struct xkb_keymap *keymap, struct xkb_any_action *action,
+HandlePtrBtn(struct xkb_keymap *keymap, union xkb_action *action,
              unsigned field, const ExprDef *array_ndx, const ExprDef *value)
 {
-    struct xkb_pointer_button_action *act;
+    struct xkb_pointer_button_action *act = &action->btn;
 
-    act = (struct xkb_pointer_button_action *) action;
     if (field == F_Button) {
         int btn;
 
@@ -564,13 +558,12 @@ static const LookupEntry ptrDflts[] = {
 };
 
 static bool
-HandleSetPtrDflt(struct xkb_keymap *keymap, struct xkb_any_action *action,
+HandleSetPtrDflt(struct xkb_keymap *keymap, union xkb_action *action,
                  unsigned field, const ExprDef *array_ndx,
                  const ExprDef *value)
 {
-    struct xkb_pointer_default_action *act;
+    struct xkb_pointer_default_action *act = &action->dflt;
 
-    act = (struct xkb_pointer_default_action *) action;
     if (field == F_Affect) {
         unsigned int val;
 
@@ -638,12 +631,11 @@ static const LookupEntry isoNames[] = {
 };
 
 static bool
-HandleISOLock(struct xkb_keymap *keymap, struct xkb_any_action *action,
+HandleISOLock(struct xkb_keymap *keymap, union xkb_action *action,
               unsigned field, const ExprDef *array_ndx, const ExprDef *value)
 {
-    struct xkb_iso_action *act;
+    struct xkb_iso_action *act = &action->iso;
 
-    act = (struct xkb_iso_action *) action;
     if (field == F_Modifiers) {
         unsigned flags;
         xkb_mod_mask_t mods;
@@ -691,13 +683,12 @@ HandleISOLock(struct xkb_keymap *keymap, struct xkb_any_action *action,
 }
 
 static bool
-HandleSwitchScreen(struct xkb_keymap *keymap, struct xkb_any_action *action,
+HandleSwitchScreen(struct xkb_keymap *keymap, union xkb_action *action,
                    unsigned field, const ExprDef *array_ndx,
                    const ExprDef *value)
 {
-    struct xkb_switch_screen_action *act;
+    struct xkb_switch_screen_action *act = &action->screen;
 
-    act = (struct xkb_switch_screen_action *) action;
     if (field == F_Screen) {
         const ExprDef *scrn;
         int val;
@@ -771,13 +762,12 @@ const LookupEntry ctrlNames[] = {
 
 static bool
 HandleSetLockControls(struct xkb_keymap *keymap,
-                      struct xkb_any_action *action,
+                      union xkb_action *action,
                       unsigned field, const ExprDef *array_ndx,
                       const ExprDef *value)
 {
-    struct xkb_controls_action *act;
+    struct xkb_controls_action *act = &action->ctrls;
 
-    act = (struct xkb_controls_action *) action;
     if (field == F_Controls) {
         unsigned int mask;
 
@@ -806,13 +796,12 @@ static const LookupEntry evNames[] = {
 };
 
 static bool
-HandleActionMessage(struct xkb_keymap *keymap, struct xkb_any_action *action,
+HandleActionMessage(struct xkb_keymap *keymap, union xkb_action *action,
                     unsigned field, const ExprDef *array_ndx,
                     const ExprDef *value)
 {
-    struct xkb_message_action *act;
+    struct xkb_message_action *act = &action->msg;
 
-    act = (struct xkb_message_action *) action;
     if (field == F_Report) {
         unsigned int mask;
 
@@ -896,12 +885,12 @@ HandleActionMessage(struct xkb_keymap *keymap, struct xkb_any_action *action,
 }
 
 static bool
-HandleRedirectKey(struct xkb_keymap *keymap, struct xkb_any_action *action,
+HandleRedirectKey(struct xkb_keymap *keymap, union xkb_action *action,
                   unsigned field, const ExprDef *array_ndx,
                   const ExprDef *value)
 {
     struct xkb_key *key;
-    struct xkb_redirect_key_action *act;
+    struct xkb_redirect_key_action *act = &action->redirect;
     unsigned t1;
     xkb_mod_mask_t t2;
     unsigned long tmp;
@@ -910,7 +899,6 @@ HandleRedirectKey(struct xkb_keymap *keymap, struct xkb_any_action *action,
     if (array_ndx != NULL)
         return ReportActionNotArray(keymap, action->type, field);
 
-    act = (struct xkb_redirect_key_action *) action;
     switch (field) {
     case F_Keycode:
         if (!ExprResolveKeyName(keymap->ctx, value, key_name))
@@ -948,13 +936,12 @@ HandleRedirectKey(struct xkb_keymap *keymap, struct xkb_any_action *action,
 }
 
 static bool
-HandleDeviceBtn(struct xkb_keymap *keymap, struct xkb_any_action *action,
+HandleDeviceBtn(struct xkb_keymap *keymap, union xkb_action *action,
                 unsigned field, const ExprDef *array_ndx,
                 const ExprDef *value)
 {
-    struct xkb_device_button_action *act;
+    struct xkb_device_button_action *act = &action->devbtn;
 
-    act = (struct xkb_device_button_action *) action;
     if (field == F_Button) {
         int val;
 
@@ -1034,24 +1021,23 @@ HandleDeviceBtn(struct xkb_keymap *keymap, struct xkb_any_action *action,
 }
 
 static bool
-HandleDeviceValuator(struct xkb_keymap *keymap, struct xkb_any_action *action,
+HandleDeviceValuator(struct xkb_keymap *keymap, union xkb_action *action,
                      unsigned field, const ExprDef *array_ndx,
                      const ExprDef *value)
 {
-#if 0
-    ExprResult rtrn;
-    struct xkb_device_valuator_action *act;
+    struct xkb_device_valuator_action *act = &action->devval;
+    (void) act;
 
-    act = (struct xkb_device_valuator_action *) action;
     /*  XXX - Not yet implemented */
-#endif
     return false;
 }
 
 static bool
-HandlePrivate(struct xkb_keymap *keymap, struct xkb_any_action *action,
+HandlePrivate(struct xkb_keymap *keymap, union xkb_action *action,
               unsigned field, const ExprDef *array_ndx, const ExprDef *value)
 {
+    struct xkb_private_action *act = &action->priv;
+
     if (field == F_Type) {
         int type;
 
@@ -1065,7 +1051,7 @@ HandlePrivate(struct xkb_keymap *keymap, struct xkb_any_action *action,
             return false;
         }
 
-        action->type = (uint8_t) type;
+        act->type = (uint8_t) type;
         return true;
     }
     else if (field == F_Data) {
@@ -1084,7 +1070,7 @@ HandlePrivate(struct xkb_keymap *keymap, struct xkb_any_action *action,
                 return false;
             }
 
-            strncpy((char *) action->data, str, sizeof(action->data));
+            strncpy((char *) act->data, str, sizeof(act->data));
             return true;
         }
         else {
@@ -1097,16 +1083,16 @@ HandlePrivate(struct xkb_keymap *keymap, struct xkb_any_action *action,
                 return false;
             }
 
-            if (ndx < 0 || ndx >= sizeof(action->data)) {
+            if (ndx < 0 || ndx >= sizeof(act->data)) {
                 log_err(keymap->ctx,
                         "The data for a private action is %zu bytes long; "
                         "Attempt to use data[%d] ignored\n",
-                        sizeof(action->data), ndx);
+                        sizeof(act->data), ndx);
                 return false;
             }
 
             if (!ExprResolveInteger(keymap->ctx, value, &datum))
-                return ReportMismatch(keymap, action->type, field, "integer");
+                return ReportMismatch(keymap, act->type, field, "integer");
 
             if (datum < 0 || datum > 255) {
                 log_err(keymap->ctx,
@@ -1115,7 +1101,7 @@ HandlePrivate(struct xkb_keymap *keymap, struct xkb_any_action *action,
                 return false;
             }
 
-            action->data[ndx] = (uint8_t) datum;
+            act->data[ndx] = (uint8_t) datum;
             return true;
         }
     }
@@ -1124,7 +1110,7 @@ HandlePrivate(struct xkb_keymap *keymap, struct xkb_any_action *action,
 }
 
 typedef bool (*actionHandler)(struct xkb_keymap *keymap,
-                              struct xkb_any_action *action, unsigned field,
+                              union xkb_action *action, unsigned field,
                               const ExprDef *array_ndx, const ExprDef *value);
 
 static const actionHandler handleAction[XkbSA_NumActions + 1] = {
@@ -1170,7 +1156,7 @@ ApplyActionFactoryDefaults(union xkb_action * action)
 int
 HandleActionDef(ExprDef * def,
                 struct xkb_keymap *keymap,
-                struct xkb_any_action *action, ActionInfo *info)
+                union xkb_action *action, ActionInfo *info)
 {
     ExprDef *arg;
     const char *str;
diff --git a/src/xkbcomp/action.h b/src/xkbcomp/action.h
index 3d63468..5cf67d9 100644
--- a/src/xkbcomp/action.h
+++ b/src/xkbcomp/action.h
@@ -68,7 +68,7 @@ typedef struct _ActionInfo {
 
 extern int
 HandleActionDef(ExprDef *def, struct xkb_keymap *keymap,
-                struct xkb_any_action *action,
+                union xkb_action *action,
                 ActionInfo *info);
 
 extern int
diff --git a/src/xkbcomp/compat.c b/src/xkbcomp/compat.c
index 1fbf2b1..b00f64a 100644
--- a/src/xkbcomp/compat.c
+++ b/src/xkbcomp/compat.c
@@ -158,8 +158,6 @@ ClearIndicatorMapInfo(struct xkb_context *ctx, LEDInfo * info)
 static void
 InitCompatInfo(CompatInfo *info, struct xkb_keymap *keymap, unsigned file_id)
 {
-    unsigned int i;
-
     info->keymap = keymap;
     info->name = NULL;
     info->file_id = file_id;
@@ -172,9 +170,8 @@ InitCompatInfo(CompatInfo *info, struct xkb_keymap *keymap, unsigned file_id)
     info->dflt.merge = MERGE_OVERRIDE;
     info->dflt.interp.flags = 0;
     info->dflt.interp.virtual_mod = XkbNoModifier;
+    memset(&info->dflt.interp.act, 0, sizeof(info->dflt.interp.act));
     info->dflt.interp.act.type = XkbSA_NoAction;
-    for (i = 0; i < sizeof(info->dflt.interp.act.any.data); i++)
-        info->dflt.interp.act.any.data[i] = 0;
     ClearIndicatorMapInfo(keymap->ctx, &info->ledDflt);
     info->ledDflt.file_id = file_id;
     info->ledDflt.defined = 0;
@@ -188,7 +185,6 @@ InitCompatInfo(CompatInfo *info, struct xkb_keymap *keymap, unsigned file_id)
 static void
 ClearCompatInfo(CompatInfo *info)
 {
-    unsigned int i;
     ActionInfo *next_act;
     SymInterpInfo *si, *next_si;
     LEDInfo *led, *next_led;
@@ -200,9 +196,8 @@ ClearCompatInfo(CompatInfo *info)
     info->dflt.merge = MERGE_AUGMENT;
     info->dflt.interp.flags = 0;
     info->dflt.interp.virtual_mod = XkbNoModifier;
+    memset(&info->dflt.interp.act, 0, sizeof(info->dflt.interp.act));
     info->dflt.interp.act.type = XkbSA_NoAction;
-    for (i = 0; i < sizeof(info->dflt.interp.act.any.data); i++)
-        info->dflt.interp.act.any.data[i] = 0;
     ClearIndicatorMapInfo(keymap->ctx, &info->ledDflt);
     info->nInterps = 0;
     list_foreach_safe(si, next_si, &info->interps, entry)
@@ -640,7 +635,7 @@ SetInterpField(CompatInfo *info, SymInterpInfo *si, const char *field,
         if (arrayNdx)
             return ReportSINotArray(info, si, field);
 
-        if (!HandleActionDef(value, keymap, &si->interp.act.any, info->act))
+        if (!HandleActionDef(value, keymap, &si->interp.act, info->act))
             return false;
 
         si->defined |= SI_FIELD_ACTION;
diff --git a/src/xkbcomp/symbols.c b/src/xkbcomp/symbols.c
index 5993a9a..7574520 100644
--- a/src/xkbcomp/symbols.c
+++ b/src/xkbcomp/symbols.c
@@ -925,7 +925,7 @@ AddActionsToKey(SymbolsInfo *info, KeyInfo *keyi, ExprDef *arrayNdx,
     xkb_group_index_t ndx;
     size_t nActs;
     ExprDef *act;
-    struct xkb_any_action *toAct;
+    union xkb_action *toAct;
 
     if (!GetGroupIndex(info, keyi, arrayNdx, ACTIONS, &ndx))
         return false;
@@ -970,7 +970,7 @@ AddActionsToKey(SymbolsInfo *info, KeyInfo *keyi, ExprDef *arrayNdx,
     }
     keyi->actsDefined |= (1 << ndx);
 
-    toAct = (struct xkb_any_action *) darray_mem(keyi->acts[ndx], 0);
+    toAct = darray_mem(keyi->acts[ndx], 0);
     act = value->value.child;
     for (i = 0; i < nActs; i++, toAct++) {
         if (!HandleActionDef(act, info->keymap, toAct, info->action)) {