Get Environment variables as std::map windows

GetEnvAsMap.cpp

std::map<std::wstring, std::wstring> GetEnvAsMap()
{
	std::map<std::wstring, std::basic_string<wchar_t>> env;

	auto free = [](wchar_t* p) { FreeEnvironmentStringsW(p); };
	const auto envBlock = std::unique_ptr<wchar_t, decltype(free)>{
			GetEnvironmentStringsW(), free };

	for (auto i = envBlock.get(); *i != L'\0'; ++i) {
		std::wstring key;
		std::wstring value;

		for (; *i != L'='; ++i)
			key += *i;
		++i;
		for (; *i != L'\0'; ++i)
			value += *i;

		env[key] = value;
	}

	return env;
}