lib: Allow json to work across different versions.

The json_object_object_get_ex function is not fully available
across all versions of json.  Write a wrapper to allow
it to work.

Ticket: CM-13872
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

2 files changed, 19 insertions, 0 deletions

diff --git a/lib/json.c b/lib/json.c
index 3edd146a8f..ccbecb726a 100644
--- a/lib/json.c
+++ b/lib/json.c
@@ -87,3 +87,18 @@ json_object_free(struct json_object *obj)
 {
   json_object_put(obj);
 }
+
+#if !defined(HAVE_JSON_C_JSON_H)
+int
+json_object_object_get_ex(struct json_object *obj,
+			  const char *key,
+			  struct json_object **value)
+{
+  *value = json_object_object_get(obj, key);
+
+  if (*value)
+    return 1;
+
+  return 0;
+}
+#endif
diff --git a/lib/json.h b/lib/json.h
index bacc799519..7e98614280 100644
--- a/lib/json.h
+++ b/lib/json.h
@@ -32,6 +32,10 @@
  * so let's just turn it back to the original usage.
  */
 #define json_object_to_json_string_ext(A, B) json_object_to_json_string (A)
+
+extern int json_object_object_get_ex(struct json_object *obj,
+					   const char *key,
+					   struct json_object **value);
 #endif
 
 #include "command.h"