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json: Don't pass null @tokens to json_parser_parse()

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json_parser_parse() normally returns the QObject on success.  Except
it returns null when its @tokens argument is null.

Its only caller json_message_process_token() passes null @tokens when
emitting a lexical error.  The call is a rather opaque way to say json
= NULL then.

Simplify matters by lifting the assignment to json out of the emit
path: initialize json to null, set it to the value of
json_parser_parse() when there's no lexical error.  Drop the special
case from json_parser_parse().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180823164025.12553-36-armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2018-08-23 18:40:02 +02:00
parent 62815d85ae
commit ff281a272f
2 changed files with 12 additions and 17 deletions
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4
qobject/json-parser.c
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@ -546,10 +546,6 @@ QObject *json_parser_parse(GQueue *tokens, va_list *ap, Error **errp)
JSONParserContext ctxt = { .buf = tokens };
QObject *result;
if (!tokens) {
return NULL;
}
result = parse_value(&ctxt, ap);
error_propagate(errp, ctxt.err);