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local ok, e
if not ok then
ok, e = pcall(require, "bit") -- the LuaJIT one ?
end
if not ok then
ok, e = pcall(require, "bit32") -- Lua 5.2
end
if not ok then
ok, e = pcall(require, "bit.numberlua") -- for Lua 5.1, https://github.com/tst2005/lua-bit-numberlua/
end
if not ok then
error("no bitwise support found", 2)
end
assert(type(e)=="table", "invalid bit module")
-- Workaround to support Lua 5.2 bit32 API with the LuaJIT bit one
if e.rol and not e.lrotate then
e.lrotate = e.rol
end
if e.ror and not e.rrotate then
e.rrotate = e.ror
end
return e
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