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
line wrap: on
line source

-- 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;
};