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

The previous commit enables conversion of

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

to

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

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

    @@
    identifier fun =~ "check_list|input_type_enum|lv_start_struct|lv_type_bool|lv_type_int64|lv_type_str|lv_type_uint64|output_type_enum|parse_type_bool|parse_type_int64|parse_type_null|parse_type_number|parse_type_size|parse_type_str|parse_type_uint64|print_type_bool|print_type_int64|print_type_null|print_type_number|print_type_size|print_type_str|print_type_uint64|qapi_clone_start_alternate|qapi_clone_start_list|qapi_clone_start_struct|qapi_clone_type_bool|qapi_clone_type_int64|qapi_clone_type_null|qapi_clone_type_number|qapi_clone_type_str|qapi_clone_type_uint64|qapi_dealloc_start_list|qapi_dealloc_start_struct|qapi_dealloc_type_anything|qapi_dealloc_type_bool|qapi_dealloc_type_int64|qapi_dealloc_type_null|qapi_dealloc_type_number|qapi_dealloc_type_str|qapi_dealloc_type_uint64|qobject_input_check_list|qobject_input_check_struct|qobject_input_start_alternate|qobject_input_start_list|qobject_input_start_struct|qobject_input_type_any|qobject_input_type_bool|qobject_input_type_bool_keyval|qobject_input_type_int64|qobject_input_type_int64_keyval|qobject_input_type_null|qobject_input_type_number|qobject_input_type_number_keyval|qobject_input_type_size_keyval|qobject_input_type_str|qobject_input_type_str_keyval|qobject_input_type_uint64|qobject_input_type_uint64_keyval|qobject_output_start_list|qobject_output_start_struct|qobject_output_type_any|qobject_output_type_bool|qobject_output_type_int64|qobject_output_type_null|qobject_output_type_number|qobject_output_type_str|qobject_output_type_uint64|start_list|visit_check_list|visit_check_struct|visit_start_alternate|visit_start_list|visit_start_struct|visit_type_.*";
    expression list args;
    typedef Error;
    Error *err;
    @@
    -    fun(args, &err);
    -    if (err)
    +    if (!fun(args, &err))
         {
             ...
         }

A few 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: <20200707160613.848843-19-armbru@redhat.com>

2 files changed, 15 insertions, 30 deletions

diff --git a/qom/object.c b/qom/object.c
index 34daaf1280..0213e87c86 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -2094,8 +2094,7 @@ static void property_set_str(Object *obj, Visitor *v, const char *name,
     char *value;
     Error *local_err = NULL;
 
-    visit_type_str(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_str(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -2175,8 +2174,7 @@ static void property_set_bool(Object *obj, Visitor *v, const char *name,
     bool value;
     Error *local_err = NULL;
 
-    visit_type_bool(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_bool(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -2248,8 +2246,7 @@ static void property_set_enum(Object *obj, Visitor *v, const char *name,
     int value;
     Error *err = NULL;
 
-    visit_type_enum(v, name, &value, prop->lookup, &err);
-    if (err) {
+    if (!visit_type_enum(v, name, &value, prop->lookup, &err)) {
         error_propagate(errp, err);
         return;
     }
@@ -2319,32 +2316,25 @@ static void property_get_tm(Object *obj, Visitor *v, const char *name,
         goto out;
     }
 
-    visit_start_struct(v, name, NULL, 0, &err);
-    if (err) {
+    if (!visit_start_struct(v, name, NULL, 0, &err)) {
         goto out;
     }
-    visit_type_int32(v, "tm_year", &value.tm_year, &err);
-    if (err) {
+    if (!visit_type_int32(v, "tm_year", &value.tm_year, &err)) {
         goto out_end;
     }
-    visit_type_int32(v, "tm_mon", &value.tm_mon, &err);
-    if (err) {
+    if (!visit_type_int32(v, "tm_mon", &value.tm_mon, &err)) {
         goto out_end;
     }
-    visit_type_int32(v, "tm_mday", &value.tm_mday, &err);
-    if (err) {
+    if (!visit_type_int32(v, "tm_mday", &value.tm_mday, &err)) {
         goto out_end;
     }
-    visit_type_int32(v, "tm_hour", &value.tm_hour, &err);
-    if (err) {
+    if (!visit_type_int32(v, "tm_hour", &value.tm_hour, &err)) {
         goto out_end;
     }
-    visit_type_int32(v, "tm_min", &value.tm_min, &err);
-    if (err) {
+    if (!visit_type_int32(v, "tm_min", &value.tm_min, &err)) {
         goto out_end;
     }
-    visit_type_int32(v, "tm_sec", &value.tm_sec, &err);
-    if (err) {
+    if (!visit_type_int32(v, "tm_sec", &value.tm_sec, &err)) {
         goto out_end;
     }
     visit_check_struct(v, &err);
@@ -2408,8 +2398,7 @@ static void property_set_uint8_ptr(Object *obj, Visitor *v, const char *name,
     uint8_t value;
     Error *local_err = NULL;
 
-    visit_type_uint8(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_uint8(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -2431,8 +2420,7 @@ static void property_set_uint16_ptr(Object *obj, Visitor *v, const char *name,
     uint16_t value;
     Error *local_err = NULL;
 
-    visit_type_uint16(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_uint16(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -2454,8 +2442,7 @@ static void property_set_uint32_ptr(Object *obj, Visitor *v, const char *name,
     uint32_t value;
     Error *local_err = NULL;
 
-    visit_type_uint32(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_uint32(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
@@ -2477,8 +2464,7 @@ static void property_set_uint64_ptr(Object *obj, Visitor *v, const char *name,
     uint64_t value;
     Error *local_err = NULL;
 
-    visit_type_uint64(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_uint64(v, name, &value, &local_err)) {
         error_propagate(errp, local_err);
         return;
     }
diff --git a/qom/object_interfaces.c b/qom/object_interfaces.c
index 7e26f86fa6..3085ae0b31 100644
--- a/qom/object_interfaces.c
+++ b/qom/object_interfaces.c
@@ -63,8 +63,7 @@ Object *user_creatable_add_type(const char *type, const char *id,
 
     assert(qdict);
     obj = object_new(type);
-    visit_start_struct(v, NULL, NULL, 0, &local_err);
-    if (local_err) {
+    if (!visit_start_struct(v, NULL, NULL, 0, &local_err)) {
         goto out;
     }
     for (e = qdict_first(qdict); e; e = qdict_next(qdict, e)) {