1 files changed, 57 insertions, 0 deletions
diff --git a/src/wire/wire_helper.c b/src/wire/wire_helper.c
new file mode 100644
index 000000000..34d40e11e
--- /dev/null
+++ b/src/wire/wire_helper.c
@@ -0,0 +1,57 @@
+/*
+  This file is part of TALER
+  (C) 2018 Taler Systems SA
+
+  TALER 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.
+
+  TALER 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
+  TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+*/
+
+/**
+ * @file wire/wire_helper.c
+ * @brief Helper functions for dealing with wire formats
+ * @author Christian Grothoff <christian@grothoff.org>
+ */
+#include "platform.h"
+#include "taler_util.h"
+#include "taler_wire_lib.h"
+
+/**
+ * Prefix of PAYTO URLs.
+ */
+#define PAYTO "payto://"
+
+
+/**
+ * Obtain the payment method from a @a payto_url
+ *
+ * @param payto_url the URL to parse
+ * @return NULL on error (malformed @a payto_url)
+ */
+char *
+TALER_WIRE_payto_get_method (const char *payto_url)
+{
+  const char *start;
+  const char *end;
+
+  if (0 != strncmp (payto_url,
+                    PAYTO,
+                    strlen (PAYTO)))
+    return NULL;
+  start = &payto_url[strlen(PAYTO)];
+  end = strchr (start,
+                (unsigned char) '/');
+  if (NULL == end)
+    return NULL;
+  return GNUNET_strndup (start,
+                         end - start);
+}
+
+/* end of wire_helper.c */