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#include <library/cpp/testing/unittest/registar.h>
#include <library/cpp/int128/int128.h>
#include "int128_ut_helpers.h"
class TUInt128Test: public TTestBase {
UNIT_TEST_SUITE(TUInt128Test);
UNIT_TEST(Create);
UNIT_TEST(Minus);
UNIT_TEST(Plus);
UNIT_TEST(Shift)
UNIT_TEST(Overflow);
UNIT_TEST(Underflow);
UNIT_TEST(ToStringTest);
UNIT_TEST(FromStringTest);
#if defined(Y_HAVE_INT128)
UNIT_TEST(FromSystemUint128);
#endif
UNIT_TEST_SUITE_END();
private:
void Create();
void Minus();
void Plus();
void Shift();
void Overflow();
void Underflow();
void ToStringTest();
void FromStringTest();
#if defined(Y_HAVE_INT128)
void FromSystemUint128();
#endif
};
UNIT_TEST_SUITE_REGISTRATION(TUInt128Test);
void TUInt128Test::Create() {
const ui128 n1 = 10;
UNIT_ASSERT_EQUAL(n1, 10);
const ui128 n2 = n1;
UNIT_ASSERT_EQUAL(n2, 10);
const ui128 n3(10);
UNIT_ASSERT_EQUAL(n3, 10);
}
void TUInt128Test::Minus() {
const ui128 n2 = 20;
const ui128 n3 = 30;
ui128 n4 = n3 - n2;
UNIT_ASSERT_EQUAL(n4, 10);
n4 = n4 - 2;
UNIT_ASSERT_EQUAL(n4, 8);
n4 -= 2;
UNIT_ASSERT_EQUAL(n4, 6);
n4 = 10 - n4;
UNIT_ASSERT_EQUAL(n4, 4);
}
void TUInt128Test::Plus() {
const ui128 n2 = 20;
const ui128 n3 = 30;
ui128 n4 = n3 + n2;
UNIT_ASSERT_EQUAL(n4, 50);
n4 = n4 + 2;
UNIT_ASSERT_EQUAL(n4, 52);
n4 += 2;
UNIT_ASSERT_EQUAL(n4, 54);
n4 = 10 + n4;
UNIT_ASSERT_EQUAL(n4, 64);
}
void TUInt128Test::Shift() {
ui128 n = 1;
const ui128 n4 = n << 4;
UNIT_ASSERT_EQUAL(n4, ui128(0x0, 0x0000000000000010));
UNIT_ASSERT_EQUAL(n4 >> 4, 1);
const ui128 n8 = n << 8;
UNIT_ASSERT_EQUAL(n8, ui128(0x0, 0x0000000000000100));
UNIT_ASSERT_EQUAL(n8 >> 8, 1);
const ui128 n60 = n << 60;
UNIT_ASSERT_EQUAL(n60, ui128(0x0, 0x1000000000000000));
UNIT_ASSERT_EQUAL(n60 >> 60, 1);
const ui128 n64 = n << 64;
UNIT_ASSERT_EQUAL(n64, ui128(0x1, 0x0000000000000000));
UNIT_ASSERT_EQUAL(n64 >> 64, 1);
const ui128 n124 = n << 124;
UNIT_ASSERT_EQUAL(n124, ui128(0x1000000000000000, 0x0000000000000000));
UNIT_ASSERT_EQUAL(n124 >> 124, 1);
}
void TUInt128Test::Overflow() {
ui128 n = ui128(0xFFFFFFFFFFFFFFFF, 0xFFFFFFFFFFFFFFFF);
const ui128 n2 = n + 2;
UNIT_ASSERT_EQUAL(n2, 1);
}
void TUInt128Test::Underflow() {
ui128 n = 1;
const ui128 n128 = n - 2;
UNIT_ASSERT_EQUAL(n128, ui128(0xFFFFFFFFFFFFFFFF, 0xFFFFFFFFFFFFFFFF));
}
void TUInt128Test::ToStringTest() {
ui128 n(0xFFFFFFFFFFFFFFFF, 0xFFFFFFFFFFFFFFFF);
TString correct = "340282366920938463463374607431768211455";
UNIT_ASSERT_EQUAL(correct, ::ToString(n));
}
void TUInt128Test::FromStringTest() {
{
const TString originalString = "37778931862957161709568";
const ui128 number = FromString<ui128>(originalString);
UNIT_ASSERT_EQUAL(ToString(number), originalString);
}
{
const TString originalString = "1024";
const ui128 number = FromString<ui128>(originalString);
UNIT_ASSERT_EQUAL(ToString(number), originalString);
UNIT_ASSERT_EQUAL(GetHigh(number), 0);
UNIT_ASSERT_EQUAL(GetLow(number), 1024);
}
{
const TString originalString = "18446744073709551616"; // 2^64, i.e. UINT64_MAX + 1
const ui128 number = FromString<ui128>(originalString);
UNIT_ASSERT_EQUAL(ToString(number), originalString);
UNIT_ASSERT_EQUAL(GetHigh(number), 1);
UNIT_ASSERT_EQUAL(GetLow(number), 0);
}
{
const TString originalString = "340282366920938463463374607431768211455"; // 2^128-1, i.e. UINT128_MAX
const ui128 number = FromString<ui128>(originalString);
UNIT_ASSERT_EQUAL(ToString(number), originalString);
UNIT_ASSERT_EQUAL(GetHigh(number), 0xFFFFFFFFFFFFFFFF);
UNIT_ASSERT_EQUAL(GetLow(number), 0xFFFFFFFFFFFFFFFF);
}
}
#if defined(Y_HAVE_INT128)
void TUInt128Test::FromSystemUint128() {
unsigned __int128 n = 1;
ui128 number{n};
UNIT_ASSERT_EQUAL(GetLow(number), 1);
UNIT_ASSERT_EQUAL(GetHigh(number), 0);
auto byteArray = NInt128Private::GetAsArray(number);
#ifdef _little_endian_
UNIT_ASSERT_EQUAL(byteArray[0], 1);
for (size_t i = 1; i < 16; i++) {
UNIT_ASSERT_EQUAL(byteArray[i], 0);
}
#elif defined(_big_endian_)
UNIT_ASSERT_EQUAL(byteArray[15], 1);
for (size_t i = 0; i < 15; i++) {
UNIT_ASSERT_EQUAL(byteArray[i], 0);
}
#endif
UNIT_ASSERT_EQUAL(std::memcmp((void*)&n, (void*)&number, 16), 0);
UNIT_ASSERT_EQUAL(ToString(n), "1");
UNIT_ASSERT_EQUAL(FromString<unsigned __int128>(ToString(n)), n);
}
#endif
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