ClickHouse/src/Common/tests/gtest_wide_integer.cpp

#include <gtest/gtest.h>
#include <common/extended_types.h>
#include <IO/WriteHelpers.h>

using namespace DB;


GTEST_TEST(WideInteger, Conversions)
{
    ASSERT_EQ(toString(UInt128(12345678901234567890ULL)), "12345678901234567890");
    ASSERT_EQ(toString(UInt256(12345678901234567890ULL)), "12345678901234567890");

    ASSERT_EQ(toString(Int128(-1234567890123456789LL)), "-1234567890123456789");
    ASSERT_EQ(toString(Int256(-1234567890123456789LL)), "-1234567890123456789");

    ASSERT_EQ(UInt64(UInt128(12345678901234567890ULL)), 12345678901234567890ULL);
    ASSERT_EQ(UInt64(UInt256(12345678901234567890ULL)), 12345678901234567890ULL);

    ASSERT_EQ(__uint128_t(UInt128(12345678901234567890ULL)), 12345678901234567890ULL);
    ASSERT_EQ(__uint128_t(UInt256(12345678901234567890ULL)), 12345678901234567890ULL);

    ASSERT_EQ(__int128_t(Int128(-1234567890123456789LL)), -1234567890123456789LL);
    ASSERT_EQ(__int128_t(Int256(-1234567890123456789LL)), -1234567890123456789LL);

    ASSERT_EQ(toString(Int128(-1)), "-1");
    ASSERT_EQ(toString(Int256(-1)), "-1");

    ASSERT_EQ(toString(UInt128(123.456)), "123");
    ASSERT_EQ(toString(UInt256(123.456)), "123");
    ASSERT_EQ(toString(Int128(-123.456)), "-123");
    ASSERT_EQ(toString(Int256(-123.456)), "-123");

    ASSERT_EQ(toString(UInt128(123.456f)), "123");
    ASSERT_EQ(toString(UInt256(123.456f)), "123");
    ASSERT_EQ(toString(Int128(-123.456f)), "-123");
    ASSERT_EQ(toString(Int256(-123.456f)), "-123");

    ASSERT_EQ(toString(UInt128(1) * 1000000000 * 1000000000 * 1000000000 * 1000000000), "1000000000000000000000000000000000000");
    ASSERT_EQ(Float64(UInt128(1) * 1000000000 * 1000000000 * 1000000000 * 1000000000), 1e36);

    ASSERT_EQ(toString(UInt256(1) * 1000000000 * 1000000000 * 1000000000 * 1000000000 * 1000000000 * 1000000000 * 1000000000 * 1000000000),
        "1000000000000000000000000000000000000000000000000000000000000000000000000");
    ASSERT_EQ(Float64(UInt256(1) * 1000000000 * 1000000000 * 1000000000 * 1000000000 * 1000000000 * 1000000000 * 1000000000 * 1000000000), 1e72);
}


GTEST_TEST(WideInteger, Arithmetic)
{
    ASSERT_EQ(UInt256(12345678901234567890ULL) * 12345678901234567890ULL / 12345678901234567890ULL, 12345678901234567890ULL);
    ASSERT_EQ(UInt256(12345678901234567890ULL) * UInt256(12345678901234567890ULL) / 12345678901234567890ULL, 12345678901234567890ULL);
    ASSERT_EQ(UInt256(12345678901234567890ULL) * 12345678901234567890ULL / UInt256(12345678901234567890ULL), 12345678901234567890ULL);
    ASSERT_EQ(UInt256(12345678901234567890ULL) * 12345678901234567890ULL / 12345678901234567890ULL, UInt256(12345678901234567890ULL));
    ASSERT_EQ(UInt128(12345678901234567890ULL) * 12345678901234567890ULL / UInt128(12345678901234567890ULL), 12345678901234567890ULL);
    ASSERT_EQ(UInt256(12345678901234567890ULL) * UInt128(12345678901234567890ULL) / 12345678901234567890ULL, 12345678901234567890ULL);
}