lib: add helpers to print json keys

Add helpers to print json keys in order to prepare the next commits.

Signed-off-by: Louis Scalbert <louis.scalbert@6wind.com>

2 files changed, 17 insertions, 0 deletions

diff --git a/lib/vty.c b/lib/vty.c
index 628c694e9..0dcd118a9 100644
--- a/lib/vty.c
+++ b/lib/vty.c
@@ -390,6 +390,21 @@ int vty_json_no_pretty(struct vty *vty, struct json_object *json)
 	return vty_json_helper(vty, json, JSON_C_TO_STRING_NOSLASHESCAPE);
 }
 
+
+void vty_json_key(struct vty *vty, const char *key, bool *first_key)
+{
+	vty_out(vty, "%s\"%s\":", *first_key ? "{" : ",", key);
+	*first_key = false;
+}
+
+void vty_json_close(struct vty *vty, bool first_key)
+{
+	if (first_key)
+		/* JSON was not opened */
+		vty_out(vty, "{");
+	vty_out(vty, "}\n");
+}
+
 void vty_json_empty(struct vty *vty, struct json_object *json)
 {
 	json_object *jsonobj = json;
diff --git a/lib/vty.h b/lib/vty.h
index a9570ef04..c336a816c 100644
--- a/lib/vty.h
+++ b/lib/vty.h
@@ -378,6 +378,8 @@ extern bool vty_set_include(struct vty *vty, const char *regexp);
  */
 extern int vty_json(struct vty *vty, struct json_object *json);
 extern int vty_json_no_pretty(struct vty *vty, struct json_object *json);
+void vty_json_key(struct vty *vty, const char *key, bool *first_key);
+void vty_json_close(struct vty *vty, bool first_key);
 extern void vty_json_empty(struct vty *vty, struct json_object *json);
 /* post fd to be passed to the vtysh client
  * fd is owned by the VTY code after this and will be closed when done