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#include <util/system/hi_lo.h>

#include <library/cpp/testing/unittest/registar.h> 

#include "defaults.h"

Y_UNIT_TEST_SUITE(HiLo) {
    Y_UNIT_TEST(HiLo32) {
        ui64 x = 0;
        Lo32(x) = 18;
        UNIT_ASSERT_VALUES_EQUAL(x, 18);

        Hi32(x) = 33;
        UNIT_ASSERT_VALUES_EQUAL(x, 141733920786);

        const ui64 y = 0x33c06196e94c03ab;
        UNIT_ASSERT_VALUES_EQUAL(Lo32(y).Get(), 0xe94c03ab);
        UNIT_ASSERT_VALUES_EQUAL(Hi32(y).Get(), 0x33c06196);
    }

    Y_UNIT_TEST(HiLo16) {
        ui32 x = 0;
        Lo16(x) = 18;
        UNIT_ASSERT_VALUES_EQUAL(x, 18);

        Hi16(x) = 33;
        UNIT_ASSERT_VALUES_EQUAL(x, 2162706);

        const ui32 y = 0xe94c03ab;
        UNIT_ASSERT_VALUES_EQUAL(Lo16(y).Get(), 0x03ab);
        UNIT_ASSERT_VALUES_EQUAL(Hi16(y).Get(), 0xe94c);
    }

    Y_UNIT_TEST(HiLo8) {
        ui16 x = 0;
        Lo8(x) = 18;
        UNIT_ASSERT_VALUES_EQUAL(x, 18);

        Hi8(x) = 33;
        UNIT_ASSERT_VALUES_EQUAL(x, 8466);

        const ui16 y = 0x03ab;
        UNIT_ASSERT_VALUES_EQUAL(Lo8(y).Get(), 0xab);
        UNIT_ASSERT_VALUES_EQUAL(Hi8(y).Get(), 0x03);
    }

    Y_UNIT_TEST(Combined) {
        ui32 x = 0;
        Lo8(Lo16(x)) = 18;
        UNIT_ASSERT_VALUES_EQUAL(x, 18);

        Hi8(Lo16(x)) = 33;
        UNIT_ASSERT_VALUES_EQUAL(x, 8466);

        const ui32 y = 0xe94c03ab;
        UNIT_ASSERT_VALUES_EQUAL(Lo8(Lo16(y)).Get(), 0xab);
        UNIT_ASSERT_VALUES_EQUAL(Hi8(Lo16(y)).Get(), 0x03);
    }

    Y_UNIT_TEST(NarrowFromWide) {
        const ui64 x = 0x1122334455667788ull;
        UNIT_ASSERT_VALUES_EQUAL(Lo8(x).Get(), 0x88);
        UNIT_ASSERT_VALUES_EQUAL(Hi8(x).Get(), 0x11);
        UNIT_ASSERT_VALUES_EQUAL(Lo16(x).Get(), 0x7788);
        UNIT_ASSERT_VALUES_EQUAL(Hi16(x).Get(), 0x1122);
        UNIT_ASSERT_VALUES_EQUAL(Lo32(x).Get(), 0x55667788);
        UNIT_ASSERT_VALUES_EQUAL(Hi32(x).Get(), 0x11223344);
    }
}