From 70a210ac4db07a28867e23db13c68aecc117810a Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Mon, 25 Nov 2019 01:42:55 +0100
Subject: add another helper

---
 src/json/json.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

(limited to 'src/json/json.c')

diff --git a/src/json/json.c b/src/json/json.c
index 90fe3dd4f..8d4089795 100644
--- a/src/json/json.c
+++ b/src/json/json.c
@@ -80,4 +80,33 @@ TALER_JSON_get_error_code (const json_t *json)
 }
 
 
+/**
+ * Extract the Taler error code from the given @a data object, which is expected to be in JSON.
+ * Note that #TALER_EC_INVALID is returned if no "code" is present or if @a data is not in JSON.
+ *
+ * @param data response to extract the error code from
+ * @param data_size number of bytes in @a data
+ * @return the "code" value from @a json
+ */
+enum TALER_ErrorCode
+TALER_JSON_get_error_code2 (const void *data,
+                            size_t data_size)
+{
+  json_t *json;
+  enum TALER_ErrorCode ec;
+  json_error_t err;
+
+  json = json_loads (data,
+                     data_size,
+                     &err);
+  if (NULL == json)
+    return TALER_EC_INVALID;
+  ec = TALER_JSON_get_error_code (json);
+  json_decref (json);
+  if (ec == TALER_EC_NONE)
+    return TALER_EC_INVALID;
+  return ec;
+}
+
+
 /* End of json/json.c */
-- 
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