Import code from previous AssetBuilder version

thirdparty/libtommath/bn_mp_unsigned_bin_size.c

@@ -0,0 +1,25 @@
+#include "tommath_private.h"
+#ifdef BN_MP_UNSIGNED_BIN_SIZE_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.
+ *
+ * SPDX-License-Identifier: Unlicense
+ */
+
+/* get the size for an unsigned equivalent */
+int mp_unsigned_bin_size(const mp_int *a)
+{
+   int     size = mp_count_bits(a);
+   return (size / 8) + ((((unsigned)size & 7u) != 0u) ? 1 : 0);
+}
+#endif
+
+/* ref:         HEAD -> master, tag: v1.1.0 */
+/* git commit:  08549ad6bc8b0cede0b357a9c341c5c6473a9c55 */
+/* commit time: 2019-01-28 20:32:32 +0100 */