Import of libtommath 0.33

1 files changed, 42 insertions, 0 deletions

diff --git a/libtommath/bn_mp_init.c b/libtommath/bn_mp_init.c
new file mode 100644
index 0000000..9d70554
--- /dev/null
+++ b/libtommath/bn_mp_init.c
@@ -0,0 +1,42 @@
+#include <tommath.h>
+#ifdef BN_MP_INIT_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
+ */
+
+/* init a new mp_int */
+int mp_init (mp_int * a)
+{
+  int i;
+
+  /* allocate memory required and clear it */
+  a->dp = OPT_CAST(mp_digit) XMALLOC (sizeof (mp_digit) * MP_PREC);
+  if (a->dp == NULL) {
+    return MP_MEM;
+  }
+
+  /* set the digits to zero */
+  for (i = 0; i < MP_PREC; i++) {
+      a->dp[i] = 0;
+  }
+
+  /* set the used to zero, allocated digits to the default precision
+   * and sign to positive */
+  a->used  = 0;
+  a->alloc = MP_PREC;
+  a->sign  = MP_ZPOS;
+
+  return MP_OKAY;
+}
+#endif