From ab6e3fce040f9ad27cbce44e9038a24f15b601c8 Mon Sep 17 00:00:00 2001
From: Matthieu Patou <mat@matws.net>
Date: Sun, 15 Aug 2010 18:31:28 +0400
Subject: s4:heimdal: import lorikeet-heimdal-201009250123 (commit
 42cabfb5b683dbcb97d583c397b897507689e382)

I based this on Matthieu's import of lorikeet-heimdal, and then
updated it to this commit.

Andrew Bartlett
---
 source4/heimdal/lib/hcrypto/libtommath/bn_mp_add.c | 53 ++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 source4/heimdal/lib/hcrypto/libtommath/bn_mp_add.c

(limited to 'source4/heimdal/lib/hcrypto/libtommath/bn_mp_add.c')

diff --git a/source4/heimdal/lib/hcrypto/libtommath/bn_mp_add.c b/source4/heimdal/lib/hcrypto/libtommath/bn_mp_add.c
new file mode 100644
index 0000000000..be20644770
--- /dev/null
+++ b/source4/heimdal/lib/hcrypto/libtommath/bn_mp_add.c
@@ -0,0 +1,53 @@
+#include <tommath.h>
+#ifdef BN_MP_ADD_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://libtom.org
+ */
+
+/* high level addition (handles signs) */
+int mp_add (mp_int * a, mp_int * b, mp_int * c)
+{
+  int     sa, sb, res;
+
+  /* get sign of both inputs */
+  sa = a->sign;
+  sb = b->sign;
+
+  /* handle two cases, not four */
+  if (sa == sb) {
+    /* both positive or both negative */
+    /* add their magnitudes, copy the sign */
+    c->sign = sa;
+    res = s_mp_add (a, b, c);
+  } else {
+    /* one positive, the other negative */
+    /* subtract the one with the greater magnitude from */
+    /* the one of the lesser magnitude.  The result gets */
+    /* the sign of the one with the greater magnitude. */
+    if (mp_cmp_mag (a, b) == MP_LT) {
+      c->sign = sb;
+      res = s_mp_sub (b, a, c);
+    } else {
+      c->sign = sa;
+      res = s_mp_sub (a, b, c);
+    }
+  }
+  return res;
+}
+
+#endif
+
+/* $Source: /cvs/libtom/libtommath/bn_mp_add.c,v $ */
+/* $Revision: 1.4 $ */
+/* $Date: 2006/12/28 01:25:13 $ */
-- 
cgit