function hllib.ReadFromPackage(path, file)
    -- get the package type (gcf, ncf, ...)
    -- atm we don't care about the type
    local type = m.hlGetPackageTypeFromName(path)

    -- tell hllib we're going to use a package
    local id = ffi.new("unsigned int[1]", 0)
    m.hlCreatePackage(type, id)
    m.hlBindPackage(id[0])

    if m.hlPackageOpenFile(path, m.HL_MODE_READ + m.HL_MODE_VOLATILE) == 1 then

        -- get the file we're looking for
        local pItem = m.hlFolderGetItemByPath(m.hlPackageGetRoot(), file, m.HL_FIND_ALL)

        -- create a stream for the file for reading
        local pStream = ffi.new("void *[1]")
        if m.hlPackageCreateStream(pItem, pStream) == 1 and m.hlStreamOpen(pStream[0], m.HL_MODE_READ) == 1 then

            local str = ""

            -- stream will be output to this char
            local pChar = ffi.new("char[1]", 0)

            -- read the stream until hllib says we're done reading
            -- this is the wrong way to write the wav but it's just an example
            while m.hlStreamReadChar(pStream[0], pChar) == 1 do
                local byte = pChar[0] + 128
                -- this is slow!!!!
                str = str .. string.char(byte)
            end

            m.hlStreamClose(pItem)
            m.hlPackageClose()

            return str
        end

        m.hlPackageClose()
    end
end

file.Write("test.wav", hllib.ReadFromPackage("I:/steam/steamapps/source sounds.gcf", "hl2/sound/buttons/button8.wav"))