kc3-lang/libtommath/bn_mp_shrink.c

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• Hash : 4534056c
  Author :
  Date : 2019-05-13T00:22:18
  

  use enums mp_err, mp_ord, mp_bool, mp_sign * MP_USE_ENUMS enables enums * Wc++-compat catches some implicit conversions if MP_USE_ENUMS is defined * 100% backwards compatible API/ABI if MP_USE_ENUMS is not defined

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• bn_mp_shrink.c

• #include "tommath_private.h"
  #ifdef BN_MP_SHRINK_C
  /* LibTomMath, multiple-precision integer library -- Tom St Denis */
  /* SPDX-License-Identifier: Unlicense */
  
  /* shrink a bignum */
  mp_err mp_shrink(mp_int *a)
  {
     static int static_check[-(MP_PREC < MP_MIN_PREC)];
     mp_digit *tmp;
     int alloc = MP_MAX(MP_MIN_PREC, a->used);
     (void)static_check;
     if (a->alloc != alloc) {
        if ((tmp = (mp_digit *) MP_REALLOC(a->dp,
                                           (size_t)a->alloc * sizeof(mp_digit),
                                           (size_t)alloc * sizeof(mp_digit))) == NULL) {
           return MP_MEM;
        }
        a->dp    = tmp;
        a->alloc = alloc;
     }
     return MP_OKAY;
  }
  #endif
  

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