version 0.3.33

[fms.git] / libs / libtommath / bn_mp_dr_setup.c

diff --git a/libs/libtommath/bn_mp_dr_setup.c b/libs/libtommath/bn_mp_dr_setup.c
new file mode 100644 (file)
index 0000000..3e82c9b
--- /dev/null
+++ b/libs/libtommath/bn_mp_dr_setup.c
@@ -0,0 +1,32 @@
+#include <tommath.h>
+#ifdef BN_MP_DR_SETUP_C
+/* LibTomMath, multiple-precision integer library -- Tom St Denis
+ *
+ * LibTomMath is a library that provides multiple-precision
+ * integer arithmetic as well as number theoretic functionality.
+ *
+ * The library was designed directly after the MPI library by
+ * Michael Fromberger but has been written from scratch with
+ * additional optimizations in place.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ *
+ * Tom St Denis, tomstdenis@gmail.com, http://math.libtomcrypt.com
+ */
+
+/* determines the setup value */
+void mp_dr_setup(mp_int *a, mp_digit *d)
+{
+   /* the casts are required if DIGIT_BIT is one less than
+    * the number of bits in a mp_digit [e.g. DIGIT_BIT==31]
+    */
+   *d = (mp_digit)((((mp_word)1) << ((mp_word)DIGIT_BIT)) - 
+        ((mp_word)a->dp[0]));
+}
+
+#endif
+
+/* $Source: /cvs/libtom/libtommath/bn_mp_dr_setup.c,v $ */
+/* $Revision: 1.3 $ */
+/* $Date: 2006/03/31 14:18:44 $ */