| 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 | |