Import code from previous AssetBuilder version

thirdparty/libtommath/bn_mp_init_size.c

@@ -0,0 +1,45 @@
+#include "tommath_private.h"
+#ifdef BN_MP_INIT_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
+ */
+
+/* init an mp_init for a given size */
+int mp_init_size(mp_int *a, int size)
+{
+   int x;
+
+   /* pad size so there are always extra digits */
+   size += (MP_PREC * 2) - (size % MP_PREC);
+
+   /* alloc mem */
+   a->dp = OPT_CAST(mp_digit) XMALLOC(sizeof(mp_digit) * (size_t)size);
+   if (a->dp == NULL) {
+      return MP_MEM;
+   }
+
+   /* set the members */
+   a->used  = 0;
+   a->alloc = size;
+   a->sign  = MP_ZPOS;
+
+   /* zero the digits */
+   for (x = 0; x < size; x++) {
+      a->dp[x] = 0;
+   }
+
+   return MP_OKAY;
+}
+#endif
+
+/* ref:         HEAD -> master, tag: v1.1.0 */
+/* git commit:  08549ad6bc8b0cede0b357a9c341c5c6473a9c55 */
+/* commit time: 2019-01-28 20:32:32 +0100 */