--- a/libtommath/bn_mp_lcm.c	Wed Feb 28 22:11:39 2018 +0800
+++ b/libtommath/bn_mp_lcm.c	Thu Oct 15 19:55:15 2020 +0800
@@ -1,60 +1,44 @@
-#include <tommath_private.h>
+#include "tommath_private.h"
 #ifdef BN_MP_LCM_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 */
 
 /* computes least common multiple as |a*b|/(a, b) */
-int mp_lcm (mp_int * a, mp_int * b, mp_int * c)
+mp_err mp_lcm(const mp_int *a, const mp_int *b, mp_int *c)
 {
-  int     res;
-  mp_int  t1, t2;
+   mp_err  err;
+   mp_int  t1, t2;
 
 
-  if ((res = mp_init_multi (&t1, &t2, NULL)) != MP_OKAY) {
-    return res;
-  }
+   if ((err = mp_init_multi(&t1, &t2, NULL)) != MP_OKAY) {
+      return err;
+   }
 
-  /* t1 = get the GCD of the two inputs */
-  if ((res = mp_gcd (a, b, &t1)) != MP_OKAY) {
-    goto LBL_T;
-  }
+   /* t1 = get the GCD of the two inputs */
+   if ((err = mp_gcd(a, b, &t1)) != MP_OKAY) {
+      goto LBL_T;
+   }
 
-  /* divide the smallest by the GCD */
-  if (mp_cmp_mag(a, b) == MP_LT) {
-     /* store quotient in t2 such that t2 * b is the LCM */
-     if ((res = mp_div(a, &t1, &t2, NULL)) != MP_OKAY) {
-        goto LBL_T;
-     }
-     res = mp_mul(b, &t2, c);
-  } else {
-     /* store quotient in t2 such that t2 * a is the LCM */
-     if ((res = mp_div(b, &t1, &t2, NULL)) != MP_OKAY) {
-        goto LBL_T;
-     }
-     res = mp_mul(a, &t2, c);
-  }
+   /* divide the smallest by the GCD */
+   if (mp_cmp_mag(a, b) == MP_LT) {
+      /* store quotient in t2 such that t2 * b is the LCM */
+      if ((err = mp_div(a, &t1, &t2, NULL)) != MP_OKAY) {
+         goto LBL_T;
+      }
+      err = mp_mul(b, &t2, c);
+   } else {
+      /* store quotient in t2 such that t2 * a is the LCM */
+      if ((err = mp_div(b, &t1, &t2, NULL)) != MP_OKAY) {
+         goto LBL_T;
+      }
+      err = mp_mul(a, &t2, c);
+   }
 
-  /* fix the sign to positive */
-  c->sign = MP_ZPOS;
+   /* fix the sign to positive */
+   c->sign = MP_ZPOS;
 
 LBL_T:
-  mp_clear_multi (&t1, &t2, NULL);
-  return res;
+   mp_clear_multi(&t1, &t2, NULL);
+   return err;
 }
 #endif
-
-/* ref:         $Format:%D$ */
-/* git commit:  $Format:%H$ */
-/* commit time: $Format:%ai$ */