s_mp_zero_digs.c

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Hash : 795cd201
Author :
Date : 2019-10-29T21:48:50

simplifications: add s_mp_zero_(digs|buf) and s_mp_copy_digs

Originally I made those as macros. However we have many
other small functions like mp_clamp, mp_exch which are also not implemented
as macros right now.

If we would use c99, I would implement them as private static inline
functions. And mp_exch would be a public static inline function.

But since we are bound to c89, we simply use normal functions.
To achieve optimal performance one should either use link time
optimization or amalgamation.

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s_mp_zero_digs.c

#include "tommath_private.h"
#ifdef S_MP_ZERO_DIGS_C
/* LibTomMath, multiple-precision integer library -- Tom St Denis */
/* SPDX-License-Identifier: Unlicense */

#ifdef MP_USE_MEMOPS
#  include <string.h>
#endif

void s_mp_zero_digs(mp_digit *d, int digits)
{
#ifdef MP_USE_MEMOPS
   if (digits > 0) {
      memset(d, 0, (size_t)digits * sizeof(mp_digit));
   }
#else
   while (digits-- > 0) {
      *d++ = 0;
   }
#endif
}

#endif

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c3-lang/libtommath/s_mp_zero_digs.c

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s_mp_zero_digs.c