# stdio stuff

global io = {
  open = fn(self, path, mode) do
    if mode == "w" do fs:store(path, "") end
    let offset = 0
    if mode == "a" do
      const size = fs:size(path)
      if size > 0 do offset = size end
    end
    return { path = path, offset = offset }
  end,

  read = fn(self, handle, count) do
    const data = fs:read_bytes(handle.path, handle.offset, count)
    handle.offset += data:len()
    return data
  end,

  read_all = fn(self, handle) do
    const size = fs:size(handle.path)
    if size <= handle.offset return ""
    const data = fs:read_bytes(handle.path, handle.offset, size - handle.offset)
    handle.offset += data:len()
    return data
  end,

  write = fn(self, handle, data) do
    fs:write_at(handle.path, handle.offset, data)
    handle.offset += data:len()
    return data:len()
  end,

  seek = fn(self, handle, offset) do handle.offset = offset end,
  tell = fn(self, handle) handle.offset,
  close = fn(self, handle) :nil,
}