File

util/bitcompat.lua @ 11789:f3085620b6ff

mod_storage_xep0227: Update for XEP-0227 r1.1: Support for SCRAM, MAM, PEP
author Matthew Wild <mwild1@gmail.com>
date Sun, 12 Sep 2021 11:38:47 +0100
parent 10241:48f7cda4174d
child 12573:0f4feaf9ca64
line wrap: on
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-- Compatibility layer for bitwise operations

-- First try the bit32 lib
-- Lua 5.3 has it with compat enabled
-- Lua 5.2 has it by default
if _G.bit32 then
	return _G.bit32;
else
	-- Lua 5.1 may have it as a standalone module that can be installed
	local ok, bitop = pcall(require, "bit32")
	if ok then
		return bitop;
	end
end

do
	-- Lua 5.3 and 5.4 would be able to use native infix operators
	local ok, bitop = pcall(require, "util.bit53")
	if ok then
		return bitop;
	end
end

do
	-- Lastly, try the LuaJIT bitop library
	local ok, bitop = pcall(require, "bit")
	if ok then
		return bitop;
	end
end

error "No bit module found. See https://prosody.im/doc/depends#bitop";