summaryrefslogtreecommitdiffstats
path: root/libtommath/bn_mp_clear.c
diff options
context:
space:
mode:
authorKevin B Kenny <kennykb@acm.org>2005-01-19 22:41:26 (GMT)
committerKevin B Kenny <kennykb@acm.org>2005-01-19 22:41:26 (GMT)
commitef78ca64ce6ba6a8786f083318fe536f2bd52925 (patch)
tree47f8ad0d7291237c7f9af988c5e05275ed9286ee /libtommath/bn_mp_clear.c
parentb23d942a1e86ddee18c2309afd7fa7e9afa79ef8 (diff)
downloadtcl-ef78ca64ce6ba6a8786f083318fe536f2bd52925.zip
tcl-ef78ca64ce6ba6a8786f083318fe536f2bd52925.tar.gz
tcl-ef78ca64ce6ba6a8786f083318fe536f2bd52925.tar.bz2
Import of libtommath 0.33
Diffstat (limited to 'libtommath/bn_mp_clear.c')
-rw-r--r--libtommath/bn_mp_clear.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/libtommath/bn_mp_clear.c b/libtommath/bn_mp_clear.c
new file mode 100644
index 0000000..5342648
--- /dev/null
+++ b/libtommath/bn_mp_clear.c
@@ -0,0 +1,40 @@
+#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@iahu.ca, http://math.libtomcrypt.org
+ */
+
+/* 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