kc3-lang/libtommath/mp_set.c

• Show log

  Commit

• 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.

Download

• mp_set.c

• #include "tommath_private.h"
  #ifdef MP_SET_C
  /* LibTomMath, multiple-precision integer library -- Tom St Denis */
  /* SPDX-License-Identifier: Unlicense */
  
  /* set to a digit */
  void mp_set(mp_int *a, mp_digit b)
  {
     int oldused = a->used;
     a->dp[0] = b & MP_MASK;
     a->sign  = MP_ZPOS;
     a->used  = (a->dp[0] != 0u) ? 1 : 0;
     s_mp_zero_digs(a->dp + a->used, oldused - a->used);
  }
  #endif
  

Download