--- a/libtommath/bn_mp_cmp_d.c	Wed Feb 28 22:11:39 2018 +0800
+++ b/libtommath/bn_mp_cmp_d.c	Thu Oct 15 19:55:15 2020 +0800
@@ -1,44 +1,28 @@
-#include <tommath_private.h>
+#include "tommath_private.h"
 #ifdef BN_MP_CMP_D_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 */
 
 /* compare a digit */
-int mp_cmp_d(mp_int * a, mp_digit b)
+mp_ord mp_cmp_d(const mp_int *a, mp_digit b)
 {
-  /* compare based on sign */
-  if (a->sign == MP_NEG) {
-    return MP_LT;
-  }
+   /* compare based on sign */
+   if (a->sign == MP_NEG) {
+      return MP_LT;
+   }
 
-  /* compare based on magnitude */
-  if (a->used > 1) {
-    return MP_GT;
-  }
+   /* compare based on magnitude */
+   if (a->used > 1) {
+      return MP_GT;
+   }
 
-  /* compare the only digit of a to b */
-  if (a->dp[0] > b) {
-    return MP_GT;
-  } else if (a->dp[0] < b) {
-    return MP_LT;
-  } else {
-    return MP_EQ;
-  }
+   /* compare the only digit of a to b */
+   if (a->dp[0] > b) {
+      return MP_GT;
+   } else if (a->dp[0] < b) {
+      return MP_LT;
+   } else {
+      return MP_EQ;
+   }
 }
 #endif
-
-/* ref:         $Format:%D$ */
-/* git commit:  $Format:%H$ */
-/* commit time: $Format:%ai$ */