kc3-lang/libtommath/s_mp_copy_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_copy_digs.c

• #include "tommath_private.h"
  #ifdef S_MP_COPY_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_copy_digs(mp_digit *d, const mp_digit *s, int digits)
  {
  #ifdef MP_USE_MEMOPS
     if (digits > 0) {
        memcpy(d, s, (size_t)digits * sizeof(mp_digit));
     }
  #else
     while (digits-- > 0) {
        *d++ = *s++;
     }
  #endif
  }
  
  #endif
  

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