Function wgetenv

src/operations.cpp:1483–1495

inline std::wstring wgetenv(const wchar_t* name)
{
    // use a separate buffer since C++03 basic_string is not required to be contiguous
    const DWORD size = ::GetEnvironmentVariableW(name, nullptr, 0);
    if (size > 0)
    {
        std::unique_ptr< wchar_t[] > buf(new wchar_t[size]);
        if (BOOST_LIKELY(::GetEnvironmentVariableW(name, buf.get(), size) > 0))
            return std::wstring(buf.get());
    }

    return std::wstring();
}

inline bool not_found_error(int errval) noexcept
{