#include <glm/ext/vector_integer.hpp>
#include <glm/ext/scalar_int_sized.hpp>
#include <glm/ext/scalar_uint_sized.hpp>
#include <vector>
#include <ctime>
#include <cstdio>

namespace isPowerOfTwo
{
	template<typename genType>
	struct type
	{
		genType		Value;
		bool		Return;
	};

	int test_int16()
	{
		type<glm::int16> const Data[] =
		{
			{ 0x0001, true },
			{ 0x0002, true },
			{ 0x0004, true },
			{ 0x0080, true },
			{ 0x0000, true },
			{ 0x0003, false }
		};

		int Error = 0;

		for (std::size_t i = 0, n = sizeof(Data) / sizeof(type<glm::int16>); i < n; ++i)
		{
			bool Result = glm::isPowerOfTwo(Data[i].Value);
			Error += Data[i].Return == Result ? 0 : 1;
		}

		return Error;
	}

	int test_uint16()
	{
		type<glm::uint16> const Data[] =
		{
			{ 0x0001, true },
			{ 0x0002, true },
			{ 0x0004, true },
			{ 0x0000, true },
			{ 0x0000, true },
			{ 0x0003, false }
		};

		int Error = 0;

		for (std::size_t i = 0, n = sizeof(Data) / sizeof(type<glm::uint16>); i < n; ++i)
		{
			bool Result = glm::isPowerOfTwo(Data[i].Value);
			Error += Data[i].Return == Result ? 0 : 1;
		}

		return Error;
	}

	int test_int32()
	{
		type<int> const Data[] =
		{
			{ 0x00000001, true },
			{ 0x00000002, true },
			{ 0x00000004, true },
			{ 0x0000000f, false },
			{ 0x00000000, true },
			{ 0x00000003, false }
		};

		int Error = 0;

		for (std::size_t i = 0, n = sizeof(Data) / sizeof(type<int>); i < n; ++i)
		{
			bool Result = glm::isPowerOfTwo(Data[i].Value);
			Error += Data[i].Return == Result ? 0 : 1;
		}

		return Error;
	}

	int test_uint32()
	{
		type<glm::uint> const Data[] =
		{
			{ 0x00000001, true },
			{ 0x00000002, true },
			{ 0x00000004, true },
			{ 0x80000000, true },
			{ 0x00000000, true },
			{ 0x00000003, false }
		};

		int Error = 0;

		for (std::size_t i = 0, n = sizeof(Data) / sizeof(type<glm::uint>); i < n; ++i)
		{
			bool Result = glm::isPowerOfTwo(Data[i].Value);
			Error += Data[i].Return == Result ? 0 : 1;
		}

		return Error;
	}

	int test()
	{
		int Error = 0;

		Error += test_int16();
		Error += test_uint16();
		Error += test_int32();
		Error += test_uint32();

		return Error;
	}
}//isPowerOfTwo

namespace prevPowerOfTwo
{
	template <typename T>
	int run()
	{
		int Error = 0;

		T const A = glm::prevPowerOfTwo(static_cast<T>(7));
		Error += A == static_cast<T>(4) ? 0 : 1;

		T const B = glm::prevPowerOfTwo(static_cast<T>(15));
		Error += B == static_cast<T>(8) ? 0 : 1;

		T const C = glm::prevPowerOfTwo(static_cast<T>(31));
		Error += C == static_cast<T>(16) ? 0 : 1;

		T const D = glm::prevPowerOfTwo(static_cast<T>(32));
		Error += D == static_cast<T>(32) ? 0 : 1;

		return Error;
	}

	int test()
	{
		int Error = 0;

		Error += run<glm::int8>();
		Error += run<glm::int16>();
		Error += run<glm::int32>();
		Error += run<glm::int64>();

		Error += run<glm::uint8>();
		Error += run<glm::uint16>();
		Error += run<glm::uint32>();
		Error += run<glm::uint64>();

		return Error;
	}
}//namespace prevPowerOfTwo

namespace nextPowerOfTwo
{
	template <typename T>
	int run()
	{
		int Error = 0;

		T const A = glm::nextPowerOfTwo(static_cast<T>(7));
		Error += A == static_cast<T>(8) ? 0 : 1;

		T const B = glm::nextPowerOfTwo(static_cast<T>(15));
		Error += B == static_cast<T>(16) ? 0 : 1;

		T const C = glm::nextPowerOfTwo(static_cast<T>(31));
		Error += C == static_cast<T>(32) ? 0 : 1;

		T const D = glm::nextPowerOfTwo(static_cast<T>(32));
		Error += D == static_cast<T>(32) ? 0 : 1;

		return Error;
	}

	int test()
	{
		int Error = 0;

		Error += run<glm::int8>();
		Error += run<glm::int16>();
		Error += run<glm::int32>();
		Error += run<glm::int64>();

		Error += run<glm::uint8>();
		Error += run<glm::uint16>();
		Error += run<glm::uint32>();
		Error += run<glm::uint64>();

		return Error;
	}
}//namespace nextPowerOfTwo

namespace prevMultiple
{
	template<typename genIUType>
	struct type
	{
		genIUType Source;
		genIUType Multiple;
		genIUType Return;
	};

	template <typename T>
	int run()
	{
		type<T> const Data[] =
		{
			{ 8, 3, 6 },
			{ 7, 7, 7 }
		};

		int Error = 0;

		for (std::size_t i = 0, n = sizeof(Data) / sizeof(type<T>); i < n; ++i)
		{
			glm::vec<4, T> const Result = glm::prevMultiple(glm::vec<4, T>(Data[i].Source), Data[i].Multiple);
			Error += glm::vec<4, T>(Data[i].Return) == Result ? 0 : 1;
		}

		return Error;
	}

	int test()
	{
		int Error = 0;

		Error += run<glm::int8>();
		Error += run<glm::int16>();
		Error += run<glm::int32>();
		Error += run<glm::int64>();

		Error += run<glm::uint8>();
		Error += run<glm::uint16>();
		Error += run<glm::uint32>();
		Error += run<glm::uint64>();

		return Error;
	}
}//namespace prevMultiple

namespace nextMultiple
{
	template<typename genIUType>
	struct type
	{
		genIUType Source;
		genIUType Multiple;
		genIUType Return;
	};

	template <typename T>
	int run()
	{
		type<T> const Data[] =
		{
			{ 8, 3, 6 },
			{ 7, 7, 7 }
		};

		int Error = 0;

		for (std::size_t i = 0, n = sizeof(Data) / sizeof(type<T>); i < n; ++i)
		{
			glm::vec<4, T> const Result = glm::nextMultiple(glm::vec<4, T>(Data[i].Source), Data[i].Multiple);
			Error += glm::vec<4, T>(Data[i].Return) == Result ? 0 : 1;
		}

		return Error;
	}

	int test()
	{
		int Error = 0;

		Error += run<glm::int8>();
		Error += run<glm::int16>();
		Error += run<glm::int32>();
		Error += run<glm::int64>();

		Error += run<glm::uint8>();
		Error += run<glm::uint16>();
		Error += run<glm::uint32>();
		Error += run<glm::uint64>();

		return Error;
	}
}//namespace nextMultiple

int main()
{
	int Error = 0;

	Error += isPowerOfTwo::test();
	Error += prevPowerOfTwo::test();
	Error += nextPowerOfTwo::test();
	Error += prevMultiple::test();
	Error += nextMultiple::test();

	return Error;
}