Software / code / prosody
File
util/bit53.lua @ 13137:b417a49cc31b
util.datamanager: Halve size of list index
Instead of storing (start, length) tuples, store the offset to the end
of items and derive length using the previous entry.
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Fri, 14 May 2021 05:49:35 +0200 |
| parent | 12365:af02b033bd7f |
| child | 13449:9912baa541c0 |
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-- Only the operators needed by net.websocket.frames are provided at this point return { band = function (a, b, ...) local ret = a & b; if ... then for i = 1, select("#", ...) do ret = ret & (select(i, ...)); end end return ret; end; bor = function (a, b, ...) local ret = a | b; if ... then for i = 1, select("#", ...) do ret = ret | (select(i, ...)); end end return ret; end; bxor = function (a, b, ...) local ret = a ~ b; if ... then for i = 1, select("#", ...) do ret = ret ~ (select(i, ...)); end end return ret; end; rshift = function (a, n) return a >> n end; lshift = function (a, n) return a << n end; };