void compressLZ4(const std::string &source, std::string &dest)
{
	int str_s = source.size();
	char* buffer = new char[LZ4_compressBound(str_s)];
	int s = LZ4_compress(source.c_str(), buffer, str_s);
	dest = std::string(buffer,s);
	delete [] buffer;
}

void decompressLZ4(const std::string &source, std::string &dest)
{
	int maxLZ4bufferSize = source.size() * 255;
	char* buffer =  new char[maxLZ4bufferSize];
	int s = LZ4_decompress_safe(source.c_str(), buffer,
		source.size(), maxLZ4bufferSize);

	dest = std::string(buffer, s);
	delete [] buffer;
}