qom: Use returned bool to check for failure, Coccinelle part

The previous commit enables conversion of

    foo(..., &err);
    if (err) {
        ...
    }

to

    if (!foo(..., errp)) {
        ...
    }

for QOM functions that now return true / false on success / error.
Coccinelle script:

    @@
    identifier fun = {
        object_apply_global_props, object_initialize_child_with_props,
        object_initialize_child_with_propsv, object_property_get,
        object_property_get_bool, object_property_parse, object_property_set,
        object_property_set_bool, object_property_set_int,
        object_property_set_link, object_property_set_qobject,
        object_property_set_str, object_property_set_uint, object_set_props,
        object_set_propv, user_creatable_add_dict,
        user_creatable_complete, user_creatable_del
    };
    expression list args, args2;
    typedef Error;
    Error *err;
    @@
    -    fun(args, &err, args2);
    -    if (err)
    +    if (!fun(args, &err, args2))
         {
             ...
         }

Fails to convert hw/arm/armsse.c, because Coccinelle gets confused by
ARMSSE being used both as typedef and function-like macro there.
Convert manually.

Line breaks tidied up manually.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20200707160613.848843-29-armbru@redhat.com>

2 files changed, 7 insertions, 14 deletions

diff --git a/qom/object.c b/qom/object.c
index 65ed2968b7..e71266bdb8 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -405,8 +405,7 @@ bool object_apply_global_props(Object *obj, const GPtrArray *props,
             continue;
         }
         p->used = true;
-        object_property_parse(obj, p->property, p->value, &err);
-        if (err != NULL) {
+        if (!object_property_parse(obj, p->property, p->value, &err)) {
             error_prepend(&err, "can't apply global %s.%s=%s: ",
                           p->driver, p->property, p->value);
             /*
@@ -566,8 +565,7 @@ bool object_initialize_child_with_propsv(Object *parentobj,
 
     uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
     if (uc) {
-        user_creatable_complete(uc, &local_err);
-        if (local_err) {
+        if (!user_creatable_complete(uc, &local_err)) {
             object_unparent(obj);
             goto out;
         }
@@ -764,8 +762,7 @@ Object *object_new_with_propv(const char *typename,
 
     uc = (UserCreatable *)object_dynamic_cast(obj, TYPE_USER_CREATABLE);
     if (uc) {
-        user_creatable_complete(uc, &local_err);
-        if (local_err) {
+        if (!user_creatable_complete(uc, &local_err)) {
             if (id != NULL) {
                 object_unparent(obj);
             }
@@ -810,8 +807,7 @@ int object_set_propv(Object *obj,
         const char *value = va_arg(vargs, char *);
 
         g_assert(value != NULL);
-        object_property_parse(obj, propname, value, &local_err);
-        if (local_err) {
+        if (!object_property_parse(obj, propname, value, &local_err)) {
             error_propagate(errp, local_err);
             return -1;
         }
@@ -1608,8 +1604,7 @@ char *object_property_print(Object *obj, const char *name, bool human,
     Error *local_err = NULL;
 
     v = string_output_visitor_new(human, &string);
-    object_property_get(obj, name, v, &local_err);
-    if (local_err) {
+    if (!object_property_get(obj, name, v, &local_err)) {
         error_propagate(errp, local_err);
         goto out;
     }
diff --git a/qom/object_interfaces.c b/qom/object_interfaces.c
index 382198504c..15fff66c3c 100644
--- a/qom/object_interfaces.c
+++ b/qom/object_interfaces.c
@@ -70,8 +70,7 @@ Object *user_creatable_add_type(const char *type, const char *id,
         goto out;
     }
     for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) {
-        object_property_set(obj, e->key, v, &local_err);
-        if (local_err) {
+        if (!object_property_set(obj, e->key, v, &local_err)) {
             break;
         }
     }
@@ -88,8 +87,7 @@ Object *user_creatable_add_type(const char *type, const char *id,
                                   id, obj);
     }
 
-    user_creatable_complete(USER_CREATABLE(obj), &local_err);
-    if (local_err) {
+    if (!user_creatable_complete(USER_CREATABLE(obj), &local_err)) {
         if (id != NULL) {
             object_property_del(object_get_objects_root(), id);
         }