--- a/libtommath/bn_mp_reduce_2k_setup.c	Wed Feb 28 22:11:39 2018 +0800
+++ b/libtommath/bn_mp_reduce_2k_setup.c	Thu Oct 15 19:55:15 2020 +0800
@@ -1,47 +1,32 @@
-#include <tommath_private.h>
+#include "tommath_private.h"
 #ifdef BN_MP_REDUCE_2K_SETUP_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, [email protected], http://libtom.org
- */
+/* LibTomMath, multiple-precision integer library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
 
 /* determines the setup value */
-int mp_reduce_2k_setup(mp_int *a, mp_digit *d)
+mp_err mp_reduce_2k_setup(const mp_int *a, mp_digit *d)
 {
-   int res, p;
+   mp_err err;
    mp_int tmp;
-   
-   if ((res = mp_init(&tmp)) != MP_OKAY) {
-      return res;
+   int    p;
+
+   if ((err = mp_init(&tmp)) != MP_OKAY) {
+      return err;
    }
-   
+
    p = mp_count_bits(a);
-   if ((res = mp_2expt(&tmp, p)) != MP_OKAY) {
+   if ((err = mp_2expt(&tmp, p)) != MP_OKAY) {
       mp_clear(&tmp);
-      return res;
+      return err;
    }
-   
-   if ((res = s_mp_sub(&tmp, a, &tmp)) != MP_OKAY) {
+
+   if ((err = s_mp_sub(&tmp, a, &tmp)) != MP_OKAY) {
       mp_clear(&tmp);
-      return res;
+      return err;
    }
-   
+
    *d = tmp.dp[0];
    mp_clear(&tmp);
    return MP_OKAY;
 }
 #endif
-
-/* ref:         $Format:%D$ */
-/* git commit:  $Format:%H$ */
-/* commit time: $Format:%ai$ */