bug-swap.c

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/* Regression test for mp_int_swap() bug on self-stored values. */
#include <stdio.h>
#include "imath.h"
 
int main(int argc, char* argv[]) {
  mpz_t a, b;
  int result;
 
  mp_int_init_value(&a, 1);
  mp_int_init_value(&b, 16);
 
  mp_int_swap(&a, &b);
  result = (a.digits == &(a.single) && b.digits == &(b.single) &&
            a.digits[0] == 16 && b.digits[0] == 1);
 
  printf("REGRESSION: mp_int_swap() on self-stored values: %s\n",
         result ? "OK" : "FAILED");
 
  mp_int_clear(&b);
  mp_int_clear(&a);
  return !result;
}