CaVM/include/Utils/Utils.h

#ifndef __JAVA_PARSER_UTILS_UTILS_H
#define __JAVA_PARSER_UTILS_UTILS_H

#include <vector>
#include <cstdint>
#include <stdexcept>
#include <SpecTypes.h>

namespace Utils
{

template <typename T, typename X>
ALWAYS_INLINE T M_POW(T x, X power)
{
	T ret = 1;

	if (power == 0)
		return 1;



	for (int i = 0; i < power; i++)
	{
		ret *= x;
	}

	if (power < 0)
	{
		for (int i = (int)power; i > 0; i++)
		{
			ret *= 1 / x;
		}
	}

	return ret;
}

template<typename T = unsigned int>
ALWAYS_INLINE T Hex2Int(T x)
{
	T ret = 0;
	int digits = 0;

	while (x != 0)
	{
		T a = x % 10;
		ret += a * M_POW(16, digits);
		x = (int)(x / 10);
		digits += 1;
	}

	return ret;
}

template <typename T>
ALWAYS_INLINE const char* Int2Hex(T x)
{
	constexpr const char *digits[] = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F"};

	std::vector<char> ret;

	while (x != 0)
	{
		T rem = x % 16;
		x = (int)(x / 16);

		ret.push_back(digits[rem]);
	}

	for (int i = 0; i < ret.size() / 2; i++)
	{
		char tmp = ret[i];
		ret[i] = ret[ret.size() - i];
		ret[ret.size() - i] = tmp;
	}

	const char *data = ret.data();

	return data;
}

template <typename T>
ALWAYS_INLINE std::vector<T> Read(std::vector<T> &vec, int start, int end)
{
	std::vector<T> ret;

	for (int i = start; i < end; i++)
	{
		ret.push_back(vec.at(i));
	}

	return ret;
}

template <typename T>
ALWAYS_INLINE std::vector<T> ReadFromStart(std::vector<T> &vec, int end)
{
	std::vector<T> ret = Read(vec, 0, end);
	for (int i = 0; i < end; i++)
		vec.erase(vec.begin());
	return ret;
}


template <typename T, typename vec_type=uint8_t>
ALWAYS_INLINE T vecToVal(std::vector<vec_type> &vec)
{
	if (vec.size() > sizeof(T))
	{
		throw std::out_of_range("Provided vector larger than type to convert to.");
	}

	T ret = 0;

	for (int i = vec.size() - 1; i >= 0; i--)
	{
		ret |= vec.at(i) << (i * 8);
	}

	return ret;
}

template <typename T, typename vec_type>
ALWAYS_INLINE T ReadFromStartIntoVal(std::vector<vec_type> &vec, int end)
{
	std::vector<uint8_t> val = ReadFromStart<vec_type>(vec, end);
	return vecToVal<T>(val);
}

template <typename T, typename vec_type>
ALWAYS_INLINE T ReadFromStartIntoVal(std::vector<vec_type> &vec)
{
	std::vector<uint8_t> val = ReadFromStart<vec_type>(vec, sizeof(T));
	return vecToVal<T>(val);
}
}

#endif