#pragma once

template<int _strlen>
class xorstring
{
public:
	xorstring(bool bNewString, int key, ...)
	{
		va_list alist;
		va_start(alist, key);
		unsigned int DWORDCOUNT = (_strlen - (_strlen % 4)) / 4;

		if (_strlen % 4)
			++DWORDCOUNT;

		for (unsigned int i = 0; i < DWORDcount; ++i) //store all DWORDs in the table
			table[i] = va_arg(alist, unsigned DWORD);

		unsigned DWORD tmp;
		for (unsigned int i = 0; i < DWORDcount; ++i)
		{
			for (int ch = 0; ch < 4; ++ch)
			{
				tmp = table[i] >> (24 - (ch * 8));
				tmp &= 255;
				tmp ^= key;
				chString[(i * 4) + ch] = static_cast<char>(tmp);
				key += 3;
				key %= 256;
			}
		}

		chString[_strlen] = 0; // add null terminator.

		if (bNewString){
			string = new char[_strlen + 1];
			for (int i = 0; i < (_strlen + 1); ++i)			//memcpy(string, chString, _strlen + 1) could be used.
				string[i] = chString[i];
		}
		va_end(alist);
	}

	char chString[(_strlen + 1)];
	char *string; // heap pointer if needed

	operator char*(void) if (bNewString){ return string; }
	else { return chString; };


private:
	unsigned DWORD table[(_strlen / 4) + 1];


};