二进制模块加载器

module(..., package.seeall)

local function load(modulename)
  local errmsg = ""
  -- Find DLL
  local symbolname = string.gsub(modulename, "%.", "_")
  local modulepath = string.gsub(modulename, "%.", "/")
  for path in string.gmatch(package.cpath, "([^;]+)") do
    local filename = string.gsub(path, "%?", modulepath)
    local file = io.open(filename, "rb")
    if file then
      file:close()
      -- Load and return the module loader
      local loader,msg = package.loadlib(filename, "luaopen_"..symbolname)
      if not loader then
        error("error loading module '"..modulename.."' from file '"..path.."':\n\t"..msg, 3)
      end
      return loader
    end
    errmsg = errmsg.."\n\tno file '"..filename.."' (checked with custom loader)"
  end
  return errmsg
end

-- Install the loader so that it's called just before the normal binary loader
table.insert(package.loaders, 3, load)