mp_init.c

   1 #include "tommath_private.h"
   2 #ifdef MP_INIT_C
   3 /* LibTomMath, multiple-precision integer library -- Tom St Denis */
   4 /* SPDX-License-Identifier: Unlicense */
   5
   6 /* init a new mp_int */
   7 mp_err mp_init(mp_int *a)
   8 {
   9    /* allocate memory required and clear it */
  10    a->dp = (mp_digit *) MP_CALLOC((size_t)MP_DEFAULT_DIGIT_COUNT, sizeof(mp_digit));
  11    if (a->dp == NULL) {
  12       return MP_MEM;
  13    }
  14
  15    /* set the used to zero, allocated digits to the default precision
  16     * and sign to positive */
  17    a->used  = 0;
  18    a->alloc = MP_DEFAULT_DIGIT_COUNT;
  19    a->sign  = MP_ZPOS;
  20
  21    return MP_OKAY;
  22 }
  23 #endif