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// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
// vi: set et ts=4 sw=2 sts=2:
// SPDX-FileCopyrightInfo: Copyright © DUNE Project contributors, see file LICENSE.md in module root
// SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
#include <cstdint>
#include <limits>
#include <iostream>
#include <dune/common/typetraits.hh>
#include <dune/common/bigunsignedint.hh>
#include <dune/common/hash.hh>
#define CHECK(x) \
do { \
if (!(x)) { \
pass = false; \
std::cerr << "FAILED: " << #x << std::endl; \
} \
} while(false)
int main()
{
bool pass = true;
typedef Dune::bigunsignedint<16> ShortInteger;
typedef Dune::bigunsignedint<128> BigInteger;
static_assert(Dune::IsNumber<ShortInteger>::value);
static_assert(Dune::IsNumber<BigInteger>::value);
/* Test std::numeric_limits for ShortInteger (should be same as for uint16_t) */
CHECK(std::numeric_limits<ShortInteger>::min() == std::numeric_limits<std::uint16_t>::min());
CHECK(std::numeric_limits<ShortInteger>::max() == std::numeric_limits<std::uint16_t>::max());
CHECK(std::numeric_limits<ShortInteger>::digits == std::numeric_limits<std::uint16_t>::digits);
CHECK(std::numeric_limits<ShortInteger>::epsilon() == std::numeric_limits<std::uint16_t>::epsilon());
CHECK(std::numeric_limits<ShortInteger>::round_error() == std::numeric_limits<std::uint16_t>::round_error());
CHECK(std::numeric_limits<ShortInteger>::is_exact);
CHECK(std::numeric_limits<ShortInteger>::is_integer);
CHECK(!std::numeric_limits<ShortInteger>::is_signed);
/* Test std::numeric_limits for BigInteger */
CHECK(std::numeric_limits<BigInteger>::min() == 0u);
CHECK(std::numeric_limits<BigInteger>::digits == 128);
CHECK(std::numeric_limits<BigInteger>::epsilon() == 0u);
CHECK(std::numeric_limits<BigInteger>::round_error() == 0u);
CHECK(std::numeric_limits<BigInteger>::is_exact);
CHECK(std::numeric_limits<BigInteger>::is_integer);
CHECK(!std::numeric_limits<BigInteger>::is_signed);
/* Test constructor */
CHECK(BigInteger(10u) == 10u);
CHECK(BigInteger(10) == BigInteger(10u));
try {
BigInteger tmp(-10);
pass = false;
std::cerr << "FAILED: BigInteger(-10) should throw an exception." << std::endl;
}
catch(const Dune::Exception&) {
/* Ignore */
}
catch(...) {
pass = false;
std::cerr << "FAILED: BigInteger(-10) threw an unexpected exception." << std::endl;
}
/* Test conversion */
CHECK(BigInteger(10u).touint() == 10u);
CHECK(BigInteger(10u).todouble() == 10.0);
/* Check BigInteger arithmetic */
CHECK(BigInteger(10u) + BigInteger(3u) == BigInteger(10u + 3u));
BigInteger tmp(10u); tmp += BigInteger(3u);
CHECK(tmp == BigInteger(10u + 3u));
CHECK(BigInteger(10u) - BigInteger(3u) == BigInteger(10u - 3u));
tmp = BigInteger(10u); tmp -= BigInteger(3u);
CHECK(tmp == BigInteger(10u - 3u));
CHECK(BigInteger(10u) * BigInteger(3u) == BigInteger(10u * 3u));
tmp = BigInteger(10u); tmp *= BigInteger(3u);
CHECK(tmp == BigInteger(10u * 3u));
CHECK(BigInteger(10u) / BigInteger(3u) == BigInteger(10u / 3u));
tmp = BigInteger(10u); tmp /= BigInteger(3u);
CHECK(tmp == BigInteger(10u / 3u));
CHECK(BigInteger(10u) % BigInteger(3u) == BigInteger(10u % 3u));
tmp = BigInteger(10u); tmp %= BigInteger(3u);
CHECK(tmp == BigInteger(10u % 3u));
CHECK(BigInteger(100000u) + BigInteger(30000u) == BigInteger(100000u + 30000u));
tmp = BigInteger(100000u); tmp += BigInteger(30000u);
CHECK(tmp == BigInteger(100000u + 30000u));
CHECK(BigInteger(100000u) - BigInteger(30000u) == BigInteger(100000u - 30000u));
tmp = BigInteger(100000u); tmp -= BigInteger(30000u);
CHECK(tmp == BigInteger(100000u - 30000u));
CHECK(BigInteger(70000u) - BigInteger(30000u) == BigInteger(70000u - 30000u));
tmp = BigInteger(70000u); tmp -= BigInteger(30000u);
CHECK(tmp == BigInteger(70000u - 30000u));
CHECK(BigInteger(100000u) * BigInteger(30000u) == BigInteger(100000u * 30000u));
tmp = BigInteger(100000u); tmp *= BigInteger(30000u);
CHECK(tmp == BigInteger(100000u * 30000u));
CHECK(BigInteger(100000u) / BigInteger(30000u) == BigInteger(100000u / 30000u));
tmp = BigInteger(100000u); tmp /= BigInteger(30000u);
CHECK(tmp == BigInteger(100000u / 30000u));
CHECK(BigInteger(100000u) % BigInteger(30000u) == BigInteger(100000u % 30000u));
tmp = BigInteger(100000u); tmp %= BigInteger(30000u);
CHECK(tmp == BigInteger(100000u % 30000u));
/* Test hashing */
{
Dune::hash<BigInteger> hasher;
CHECK(hasher(BigInteger(100)) == hasher(BigInteger(100)));
}
const BigInteger one{1};
const BigInteger zero{0};
CHECK((one & one) == one);
CHECK((one & zero) == zero);
CHECK((one | one) == one);
CHECK((one | zero) == one);
CHECK((one ^ one) == zero);
CHECK((one ^ zero) == one);
CHECK(bit_width(ShortInteger{0u}) == 0);
CHECK(bit_width(BigInteger{0u}) == 0);
for (unsigned int i = 1; i != 100; ++i) {
CHECK(bit_width(ShortInteger{i}) == std::bit_width(i));
CHECK(bit_width(BigInteger{i}) == std::bit_width(i));
CHECK(countl_zero(ShortInteger{i}) == std::numeric_limits<ShortInteger>::digits - std::bit_width(i));
CHECK(countl_zero(BigInteger{i}) == std::numeric_limits<BigInteger>::digits - std::bit_width(i));
}
CHECK(bit_width(std::numeric_limits<ShortInteger>::max()) == 16);
CHECK(bit_width(std::numeric_limits<BigInteger>::max()) == 128);
return pass ? 0 : 1;
}
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