From c3ab96b242ab18a7a856d59a3618f4bd13ac3384 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Wed, 3 Jun 2015 15:41:09 +0200
Subject: more documenting, checking for consistency between prepared
 statements and functional logic

---
 src/util/amount.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

(limited to 'src/util/amount.c')

diff --git a/src/util/amount.c b/src/util/amount.c
index 74ffcd36f..20b8618df 100644
--- a/src/util/amount.c
+++ b/src/util/amount.c
@@ -237,6 +237,20 @@ test_valid (const struct TALER_Amount *a)
 }
 
 
+/**
+ * Test if @a a is valid, NBO variant.
+ *
+ * @param a amount to test
+ * @return #GNUNET_YES if valid,
+ *         #GNUNET_NO if invalid
+ */
+static int
+test_valid_nbo (const struct TALER_AmountNBO *a)
+{
+  return ('\0' != a->currency[0]);
+}
+
+
 /**
  * Test if @a a1 and @a a2 are the same currency.
  *
@@ -260,6 +274,29 @@ TALER_amount_cmp_currency (const struct TALER_Amount *a1,
 }
 
 
+/**
+ * Test if @a a1 and @a a2 are the same currency, NBO variant.
+ *
+ * @param a1 amount to test
+ * @param a2 amount to test
+ * @return #GNUNET_YES if @a a1 and @a a2 are the same currency
+ *         #GNUNET_NO if the currencies are different,
+ *         #GNUNET_SYSERR if either amount is invalid
+ */
+int
+TALER_amount_cmp_currency_nbo (const struct TALER_AmountNBO *a1,
+                               const struct TALER_AmountNBO *a2)
+{
+  if ( (GNUNET_NO == test_valid_nbo (a1)) ||
+       (GNUNET_NO == test_valid_nbo (a2)) )
+    return GNUNET_SYSERR;
+  if (0 == strcasecmp (a1->currency,
+		       a2->currency))
+    return GNUNET_YES;
+  return GNUNET_NO;
+}
+
+
 /**
  * Compare the value/fraction of two amounts.  Does not compare the currency.
  * Comparing amounts of different currencies will cause the program to abort().
-- 
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