merge from main

--HG--
branch : fuzz

1 files changed, 42 insertions, 60 deletions

diff --git a/libtommath/bn_mp_mul_d.c b/libtommath/bn_mp_mul_d.c
index 6954ed3..b56dfa3 100644
--- a/libtommath/bn_mp_mul_d.c
+++ b/libtommath/bn_mp_mul_d.c
@@ -1,79 +1,61 @@
-#include <tommath_private.h>
+#include "tommath_private.h"
 #ifdef BN_MP_MUL_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, tstdenis82@gmail.com, http://libtom.org
- */
+/* LibTomMath, multiple-precision integer library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
 
 /* multiply by a digit */
-int
-mp_mul_d (mp_int * a, mp_digit b, mp_int * c)
+mp_err mp_mul_d(const mp_int *a, mp_digit b, mp_int *c)
 {
-  mp_digit u, *tmpa, *tmpc;
-  mp_word  r;
-  int      ix, res, olduse;
+   mp_digit u, *tmpa, *tmpc;
+   mp_word  r;
+   mp_err   err;
+   int      ix, olduse;
 
-  /* make sure c is big enough to hold a*b */
-  if (c->alloc < (a->used + 1)) {
-    if ((res = mp_grow (c, a->used + 1)) != MP_OKAY) {
-      return res;
-    }
-  }
+   /* make sure c is big enough to hold a*b */
+   if (c->alloc < (a->used + 1)) {
+      if ((err = mp_grow(c, a->used + 1)) != MP_OKAY) {
+         return err;
+      }
+   }
 
-  /* get the original destinations used count */
-  olduse = c->used;
+   /* get the original destinations used count */
+   olduse = c->used;
 
-  /* set the sign */
-  c->sign = a->sign;
+   /* set the sign */
+   c->sign = a->sign;
 
-  /* alias for a->dp [source] */
-  tmpa = a->dp;
+   /* alias for a->dp [source] */
+   tmpa = a->dp;
 
-  /* alias for c->dp [dest] */
-  tmpc = c->dp;
+   /* alias for c->dp [dest] */
+   tmpc = c->dp;
 
-  /* zero carry */
-  u = 0;
+   /* zero carry */
+   u = 0;
 
-  /* compute columns */
-  for (ix = 0; ix < a->used; ix++) {
-    /* compute product and carry sum for this term */
-    r       = (mp_word)u + ((mp_word)*tmpa++ * (mp_word)b);
+   /* compute columns */
+   for (ix = 0; ix < a->used; ix++) {
+      /* compute product and carry sum for this term */
+      r       = (mp_word)u + ((mp_word)*tmpa++ * (mp_word)b);
 
-    /* mask off higher bits to get a single digit */
-    *tmpc++ = (mp_digit) (r & ((mp_word) MP_MASK));
+      /* mask off higher bits to get a single digit */
+      *tmpc++ = (mp_digit)(r & (mp_word)MP_MASK);
 
-    /* send carry into next iteration */
-    u       = (mp_digit) (r >> ((mp_word) DIGIT_BIT));
-  }
+      /* send carry into next iteration */
+      u       = (mp_digit)(r >> (mp_word)MP_DIGIT_BIT);
+   }
 
-  /* store final carry [if any] and increment ix offset  */
-  *tmpc++ = u;
-  ++ix;
+   /* store final carry [if any] and increment ix offset  */
+   *tmpc++ = u;
+   ++ix;
 
-  /* now zero digits above the top */
-  while (ix++ < olduse) {
-     *tmpc++ = 0;
-  }
+   /* now zero digits above the top */
+   MP_ZERO_DIGITS(tmpc, olduse - ix);
 
-  /* set used count */
-  c->used = a->used + 1;
-  mp_clamp(c);
+   /* set used count */
+   c->used = a->used + 1;
+   mp_clamp(c);
 
-  return MP_OKAY;
+   return MP_OKAY;
 }
 #endif
-
-/* ref:         $Format:%D$ */
-/* git commit:  $Format:%H$ */
-/* commit time: $Format:%ai$ */