1 files changed, 92 insertions, 0 deletions

diff --git a/src/json/json.c b/src/json/json.c
new file mode 100644
index 000000000..aa74bfd48
--- /dev/null
+++ b/src/json/json.c
@@ -0,0 +1,92 @@
+/*
+  This file is part of GNUnet
+  Copyright (C) 2014, 2015, 2016 GNUnet e.V.
+
+  GNUnet is free software; you can redistribute it and/or modify it under the
+  terms of the GNU General Public License as published by the Free Software
+  Foundation; either version 3, or (at your option) any later version.
+
+  GNUnet is distributed in the hope that it will be useful, but WITHOUT ANY
+  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License along with
+  GNUnet; see the file COPYING.  If not, If not, see <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file json/json.c
+ * @brief functions to parse JSON snippets
+ * @author Florian Dold
+ * @author Benedikt Mueller
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "gnunet_json_lib.h"
+
+
+/**
+ * Navigate and parse data in a JSON tree.  Tries to parse the @a root
+ * to find all of the values given in the @a spec.  If one of the
+ * entries in @a spec cannot be found or parsed, the name of the JSON
+ * field is returned in @a error_json_name, and the offset of the
+ * entry in @a spec is returned in @a error_line.
+ *
+ * @param root the JSON node to start the navigation at.
+ * @param spec parse specification array
+ * @param[out] error_json_name which JSON field was problematic
+ * @param[out] which index into @a spec did we encounter an error
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
+ */
+int
+GNUNET_JSON_parse (const json_t *root,
+                   struct GNUNET_JSON_Specification *spec,
+                   const char **error_json_name,
+                   unsigned int *error_line)
+{
+  unsigned int i;
+  json_t *pos;
+
+  for (i=0;NULL != spec[i].parser;i++)
+  {
+    if (NULL == spec[i].field)
+      pos = (json_t *) root;
+    else
+      pos = json_object_get (root,
+                             spec[i].field);
+    if ( (NULL == pos) ||
+         (GNUNET_OK !=
+          spec[i].parser (spec[i].cls,
+                          pos,
+                          &spec[i])) )
+    {
+      if (NULL != error_json_name)
+        *error_json_name = spec[i].field;
+      if (NULL != error_line)
+        *error_line = i;
+      GNUNET_JSON_parse_free (spec);
+      return GNUNET_SYSERR;
+    }
+  }
+  return GNUNET_OK; /* all OK! */
+}
+
+
+/**
+ * Frees all elements allocated during a #GNUNET_JSON_parse()
+ * operation.
+ *
+ * @param spec specification of the parse operation
+ */
+void
+GNUNET_JSON_parse_free (struct GNUNET_JSON_Specification *spec)
+{
+  unsigned int i;
+
+  for (i=0;NULL != spec[i].parser;i++)
+    if (NULL != spec[i].cleaner)
+      spec[i].cleaner (spec[i].cls,
+                       &spec[i]);
+}
+
+
+/* end of json.c */