// ==========================================================================
//                 SeqAn - The Library for Sequence Analysis
// ==========================================================================
// Copyright (c) 2006-2024, Knut Reinert, FU Berlin
// All rights reserved.
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// ==========================================================================
// Author: Manuel Holtgrewe <manuel.holtgrewe@fu-berlin.de>
// ==========================================================================
// Tests for the math metaprogramming code.
// ==========================================================================

#ifndef SEQAN_TESTS_BASIC_TEST_BASIC_METAPROGRAMMING_MATH_H_
#define SEQAN_TESTS_BASIC_TEST_BASIC_METAPROGRAMMING_MATH_H_

// In the following, we use the unary plus to create an lvalue such
// that the comparison functionwith "T const &" typed parameter does
// not try to access the address of ::VALUE.

SEQAN_DEFINE_TEST(test_basic_metaprogramming_math_log2)
{
    using namespace seqan2;

    SEQAN_ASSERT_EQ(+Log2<1>::VALUE, 0u);
    SEQAN_ASSERT_EQ(+Log2<2>::VALUE, 1u);
    SEQAN_ASSERT_EQ(+Log2<3>::VALUE, 2u);
    SEQAN_ASSERT_EQ(+Log2<4>::VALUE, 2u);
    SEQAN_ASSERT_EQ(+Log2<5>::VALUE, 3u);
    SEQAN_ASSERT_EQ(+Log2<7>::VALUE, 3u);
    SEQAN_ASSERT_EQ(+Log2<8>::VALUE, 3u);
    SEQAN_ASSERT_EQ(+Log2<9>::VALUE, 4u);

    SEQAN_ASSERT_EQ(+Log2<127>::VALUE, 7u);
    SEQAN_ASSERT_EQ(+Log2<128>::VALUE, 7u);
    SEQAN_ASSERT_EQ(+Log2<129>::VALUE, 8u);
}

SEQAN_DEFINE_TEST(test_basic_metaprogramming_math_log2_floor)
{
    using namespace seqan2;

    SEQAN_ASSERT_EQ(+Log2Floor<1>::VALUE, 0u);
    SEQAN_ASSERT_EQ(+Log2Floor<2>::VALUE, 1u);
    SEQAN_ASSERT_EQ(+Log2Floor<3>::VALUE, 1u);
    SEQAN_ASSERT_EQ(+Log2Floor<4>::VALUE, 2u);
    SEQAN_ASSERT_EQ(+Log2Floor<5>::VALUE, 2u);
    SEQAN_ASSERT_EQ(+Log2Floor<7>::VALUE, 2u);
    SEQAN_ASSERT_EQ(+Log2Floor<8>::VALUE, 3u);
    SEQAN_ASSERT_EQ(+Log2Floor<9>::VALUE, 3u);

    SEQAN_ASSERT_EQ(+Log2Floor<127>::VALUE, 6u);
    SEQAN_ASSERT_EQ(+Log2Floor<128>::VALUE, 7u);
    SEQAN_ASSERT_EQ(+Log2Floor<129>::VALUE, 7u);
}

SEQAN_DEFINE_TEST(test_basic_metaprogramming_math_log2_power)
{
    using namespace seqan2;

    SEQAN_ASSERT_EQ((+Power<0, 0>::VALUE), 1u);
    SEQAN_ASSERT_EQ((+Power<0, 1>::VALUE), 0u);
    SEQAN_ASSERT_EQ((+Power<0, 42>::VALUE), 0u);

    SEQAN_ASSERT_EQ((+Power<1, 0>::VALUE), 1u);
    SEQAN_ASSERT_EQ((+Power<1, 1>::VALUE), 1u);
    SEQAN_ASSERT_EQ((+Power<1, 42>::VALUE), 1u);

    SEQAN_ASSERT_EQ((+Power<2, 0>::VALUE), 1u);
    SEQAN_ASSERT_EQ((+Power<2, 1>::VALUE), 2u);
    SEQAN_ASSERT_EQ((+Power<2, 10>::VALUE), 1024u);
}

#endif  // #ifndef SEQAN_TESTS_BASIC_TEST_BASIC_METAPROGRAMMING_MATH_H_
