kc3-lang/libtommath/s_mp_get_bit.c

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• Hash : bf9507a9
  Author :
  Date : 2019-10-24T22:02:29
  

  replace mp_bool by stdbool * This gives the advantage that static analysis **understands** bool, but complains about using an enum type instead of bool. * If stdbool.h is not desired, true/false/bool can be replaced using sed as in the no-stdint-h branch. * We already include stdint.h and stdbool.h is not more harmful than this header

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• s_mp_get_bit.c

• #include "tommath_private.h"
  #ifdef S_MP_GET_BIT_C
  
  /* LibTomMath, multiple-precision integer library -- Tom St Denis */
  /* SPDX-License-Identifier: Unlicense */
  
  /* Get bit at position b and return true if the bit is 1, false if it is 0 */
  bool s_mp_get_bit(const mp_int *a, unsigned int b)
  {
     mp_digit bit;
     int limb = (int)(b / MP_DIGIT_BIT);
  
     if (limb >= a->used) {
        return false;
     }
  
     bit = (mp_digit)1 << (b % MP_DIGIT_BIT);
     return ((a->dp[limb] & bit) != 0u);
  }
  
  #endif
  

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