www.usr.com/support/gpl/USR9107_release.1.4.tar.gz

[bcm963xx.git] / userapps / opensource / sshd / libtommath / bn_mp_shrink.c

diff --git a/userapps/opensource/sshd/libtommath/bn_mp_shrink.c b/userapps/opensource/sshd/libtommath/bn_mp_shrink.c
index 023a46b..b31f9d2 100755 (executable)
--- a/userapps/opensource/sshd/libtommath/bn_mp_shrink.c
+++ b/userapps/opensource/sshd/libtommath/bn_mp_shrink.c
@@ -1,9 +1,11 @@
+#include <tommath.h>
+#ifdef BN_MP_SHRINK_C
 /* LibTomMath, multiple-precision integer library -- Tom St Denis
  *
- * LibTomMath is library that provides for multiple-precision
+ * LibTomMath is a library that provides multiple-precision
  * integer arithmetic as well as number theoretic functionality.
  *
- * The library is designed directly after the MPI library by
+ * The library was designed directly after the MPI library by
  * Michael Fromberger but has been written from scratch with
  * additional optimizations in place.
  *
@@ -12,17 +14,18 @@
  *
  * Tom St Denis, tomstdenis@iahu.ca, http://math.libtomcrypt.org
  */
-#include <tommath.h>
 
 /* shrink a bignum */
-int
-mp_shrink (mp_int * a)
+int mp_shrink (mp_int * a)
 {
-  if (a->alloc != a->used) {
-    if ((a->dp = OPT_CAST realloc (a->dp, sizeof (mp_digit) * a->used)) == NULL) {
+  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;
 }
+#endif