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>

3 files changed, 4 insertions, 8 deletions

diff --git a/net/colo-compare.c b/net/colo-compare.c
index f15779dedc..6835d42363 100644
--- a/net/colo-compare.c
+++ b/net/colo-compare.c
@@ -1096,8 +1096,7 @@ static void compare_set_timeout(Object *obj, Visitor *v,
     Error *local_err = NULL;
     uint32_t value;
 
-    visit_type_uint32(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_uint32(v, name, &value, &local_err)) {
         goto out;
     }
     if (!value) {
@@ -1129,8 +1128,7 @@ static void compare_set_expired_scan_cycle(Object *obj, Visitor *v,
     Error *local_err = NULL;
     uint32_t value;
 
-    visit_type_uint32(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_uint32(v, name, &value, &local_err)) {
         goto out;
     }
     if (!value) {
diff --git a/net/dump.c b/net/dump.c
index 61389e7dad..8c487a5590 100644
--- a/net/dump.c
+++ b/net/dump.c
@@ -195,8 +195,7 @@ static void filter_dump_set_maxlen(Object *obj, Visitor *v, const char *name,
     Error *local_err = NULL;
     uint32_t value;
 
-    visit_type_uint32(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_uint32(v, name, &value, &local_err)) {
         goto out;
     }
     if (value == 0) {
diff --git a/net/filter-buffer.c b/net/filter-buffer.c
index 93050f86cf..8e42934b37 100644
--- a/net/filter-buffer.c
+++ b/net/filter-buffer.c
@@ -173,8 +173,7 @@ static void filter_buffer_set_interval(Object *obj, Visitor *v,
     Error *local_err = NULL;
     uint32_t value;
 
-    visit_type_uint32(v, name, &value, &local_err);
-    if (local_err) {
+    if (!visit_type_uint32(v, name, &value, &local_err)) {
         goto out;
     }
     if (!value) {