version 0.3.33

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

diff --git a/libs/libtommath/bn_mp_clear.c b/libs/libtommath/bn_mp_clear.c
new file mode 100644 (file)
index 0000000..ae7c50a
--- /dev/null
+++ b/libs/libtommath/bn_mp_clear.c
@@ -0,0 +1,44 @@
+#include <tommath.h>
+#ifdef BN_MP_CLEAR_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
+ */
+
+/* clear one (frees)  */
+void
+mp_clear (mp_int * a)
+{
+  int i;
+
+  /* only do anything if a hasn't been freed previously */
+  if (a->dp != NULL) {
+    /* first zero the digits */
+    for (i = 0; i < a->used; i++) {
+        a->dp[i] = 0;
+    }
+
+    /* free ram */
+    XFREE(a->dp);
+
+    /* reset members to make debugging easier */
+    a->dp    = NULL;
+    a->alloc = a->used = 0;
+    a->sign  = MP_ZPOS;
+  }
+}
+#endif
+
+/* $Source: /cvs/libtom/libtommath/bn_mp_clear.c,v $ */
+/* $Revision: 1.3 $ */
+/* $Date: 2006/03/31 14:18:44 $ */