--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/bn_mp_shrink.c	Mon May 31 18:25:22 2004 +0000
@@ -0,0 +1,29 @@
+/* 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, [email protected], http://math.libtomcrypt.org
+ */
+#include <tommath.h>
+
+/* shrink a bignum */
+int mp_shrink (mp_int * a)
+{
+  mp_digit *tmp;
+  if (a->alloc != a->used && a->used > 0) {
+    if ((tmp = OPT_CAST(mp_digit) XREALLOC (a->dp, sizeof (mp_digit) * a->used)) == NULL) {
+      return MP_MEM;
+    }
+    a->dp    = tmp;
+    a->alloc = a->used;
+  }
+  return MP_OKAY;
+}