[PATCH i-g-t v3 4/5] runner/resultgen: Add json array create/get helper

["Zbigniew Kempczyński" <zbigniew.kempczynski@intel.com>]

Upcoming patch which extends results.json to contain attachments
is going to put file list in the array instead of key=value pair.
Add helper which creates/finds array object in json structure.

Signed-off-by: Zbigniew Kempczyński <zbigniew.kempczynski@intel.com>
Cc: Kamil Konieczny <kamil.konieczny@linux.intel.com>
Cc: Ryszard Knop <ryszard.knop@intel.com>
Cc: Krzysztof Karas <krzysztof.karas@intel.com>
---
 runner/resultgen.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/runner/resultgen.c b/runner/resultgen.c
index 29fc5cbb15..f8459385c3 100644
--- a/runner/resultgen.c
+++ b/runner/resultgen.c
@@ -271,6 +271,20 @@ static struct json_t *get_or_create_json_object(struct json_t *base, const char
 	return ret;
 }
 
+static struct json_t *get_or_create_json_array(struct json_t *base, const char *key)
+{
+	struct json_t *ret = json_object_get(base, key);
+
+	if (ret)
+		return ret;
+
+	ret = json_array();
+	json_object_set_new(base, key, ret);
+
+	return ret;
+}
+
+
 static void set_result(struct json_t *obj, const char *result)
 {
 	if (!result)
-- 
2.43.0