Software /
code /
prosody
File
plugins/mod_storage_none.lua @ 13134:638f627e707f
util.datamanager: Add O(1) list indexing with on-disk index
Index file contains offsets and lengths of each item() which allows
seeking directly to each item and reading it without parsing the entire
file.
Also allows tricks like binary search, assuming items have some defined
order.
We take advantage of the 1-based indexing in tables to store a magic
header in the 0 position, so that table index 1 ends up at file index 1.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Tue, 11 May 2021 02:09:56 +0200 |
parent | 8061:ef671d337577 |
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-- luacheck: ignore 212 local driver = {}; local driver_mt = { __index = driver }; function driver:open(store, typ) if typ and typ ~= "keyval" and typ ~= "archive" then return nil, "unsupported-store"; end return setmetatable({ store = store, type = typ }, driver_mt); end function driver:get(user) return {}; end function driver:set(user, data) return nil, "Storage disabled"; end function driver:stores(username) return { "roster" }; end function driver:purge(user) return true; end function driver:append() return nil, "Storage disabled"; end function driver:find() return function () end, 0; end function driver:delete() return true; end module:provides("storage", driver);