Function CheckSubtract

src/test/scriptnum_tests.cpp:79–103

}

static void CheckSubtract(const int64_t& num1, const int64_t& num2)
{
    const CBigNum bignum1(num1);
    const CBigNum bignum2(num2);
    const CScriptNum scriptnum1(num1);
    const CScriptNum scriptnum2(num2);
    bool invalid = false;

    // int64_t overflow is undefined.
    invalid = ((num2 > 0 && num1 < std::numeric_limits<int64_t>::min() + num2) ||
               (num2 < 0 && num1 > std::numeric_limits<int64_t>::max() + num2));
    if (!invalid)
    {
        BOOST_CHECK(verify(bignum1 - bignum2, scriptnum1 - scriptnum2));
        BOOST_CHECK(verify(bignum1 - bignum2, scriptnum1 - num2));
    }

    invalid = ((num1 > 0 && num2 < std::numeric_limits<int64_t>::min() + num1) ||
               (num1 < 0 && num2 > std::numeric_limits<int64_t>::max() + num1));
    if (!invalid)
    {
        BOOST_CHECK(verify(bignum2 - bignum1, scriptnum2 - scriptnum1));
        BOOST_CHECK(verify(bignum2 - bignum1, scriptnum2 - num1));
    }
}

static void CheckCompare(const int64_t& num1, const int64_t& num2)
{