1 files changed, 48 insertions, 0 deletions
diff --git a/src/include/taler_util.h b/src/include/taler_util.h
index c7bf9c02a..22d7f7f2a 100644
--- a/src/include/taler_util.h
+++ b/src/include/taler_util.h
@@ -298,4 +298,52 @@ char *
 TALER_xtalerbank_account_from_payto (const char *payto);
 
 
+/**
+ * Possible values for a binary filter.
+ */
+enum TALER_EXCHANGE_YesNoAll
+{
+  /**
+   * If condition is yes.
+   */
+  TALER_EXCHANGE_YNA_YES = 1,
+
+  /**
+  * If condition is no.
+  */
+  TALER_EXCHANGE_YNA_NO = 2,
+
+  /**
+   * Condition disabled.
+   */
+  TALER_EXCHANGE_YNA_ALL = 3
+};
+
+
+/**
+ * Convert query argument to @a yna value.
+ *
+ * @param connection connection to take query argument from
+ * @param arg argument to try for
+ * @param default_val value to assign if the argument is not present
+ * @param[out] value to set
+ * @return true on success, false if the parameter was malformed
+ */
+bool
+TALER_arg_to_yna (struct MHD_Connection *connection,
+                  const char *arg,
+                  enum TALER_EXCHANGE_YesNoAll default_val,
+                  enum TALER_EXCHANGE_YesNoAll *yna);
+
+
+/**
+ * Convert YNA value to a string.
+ *
+ * @param yna value to convert
+ * @return string representation ("yes"/"no"/"all").
+ */
+const char *
+TALER_yna_to_string (enum TALER_EXCHANGE_YesNoAll yna);
+
+
 #endif