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-rw-r--r--src/util/amount.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/src/util/amount.c b/src/util/amount.c
index b5e28051c..5b0c3af53 100644
--- a/src/util/amount.c
+++ b/src/util/amount.c
@@ -391,6 +391,35 @@ TALER_amount_cmp (const struct TALER_Amount *a1,
/**
+ * Compare the value/fraction of two amounts. Does not compare the currency.
+ * Comparing amounts of different currencies will cause the program to abort().
+ * If unsure, check with #TALER_amount_cmp_currency() first to be sure that
+ * the currencies of the two amounts are identical. NBO variant.
+ *
+ * @param a1 first amount
+ * @param a2 second amount
+ * @return result of the comparison
+ * -1 if `a1 < a2`
+ * 1 if `a1 > a2`
+ * 0 if `a1 == a2`.
+ */
+int
+TALER_amount_cmp_nbo (const struct TALER_AmountNBO *a1,
+ const struct TALER_AmountNBO *a2)
+{
+ struct TALER_Amount h1;
+ struct TALER_Amount h2;
+
+ TALER_amount_ntoh (&h1,
+ a1);
+ TALER_amount_ntoh (&h2,
+ a2);
+ return TALER_amount_cmp (&h1,
+ &h2);
+}
+
+
+/**
* Perform saturating subtraction of amounts.
*
* @param[out] diff where to store (@a a1 - @a a2), or invalid if @a a2 > @a a1