hcrypto: import libtommath v1.2.0

lib/hcrypto/libtommath/bn_mp_init_copy.c

@@ -1,32 +1,21 @@
-#include <tommath.h>
+#include "tommath_private.h"
 #ifdef BN_MP_INIT_COPY_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@gmail.com, http://libtom.org
- */
+/* LibTomMath, multiple-precision integer library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
 
 /* creates "a" then copies b into it */
-int mp_init_copy (mp_int * a, mp_int * b)
+mp_err mp_init_copy(mp_int *a, const mp_int *b)
 {
-  int     res;
+   mp_err     err;
 
-  if ((res = mp_init (a)) != MP_OKAY) {
-    return res;
-  }
-  return mp_copy (b, a);
+   if ((err = mp_init_size(a, b->used)) != MP_OKAY) {
+      return err;
+   }
+
+   if ((err = mp_copy(b, a)) != MP_OKAY) {
+      mp_clear(a);
+   }
+
+   return err;
 }
 #endif
-
-/* $Source: /cvs/libtom/libtommath/bn_mp_init_copy.c,v $ */
-/* $Revision: 1.4 $ */
-/* $Date: 2006/12/28 01:25:13 $ */