Error accessing bit library

Developer's Corner General Dev Discussions
1 
bit = require(“bit”)

this is generating an error message … is there an updated way to accomplish this snippet below?

if bit.band(b, ls) == b then
return v
end
2

What machine are you running this on? Your Lua installation may not have this installed by default.

(I moved this to a new topic from an eight-year-old thread.)

1 Like
3

either that or you have an oriented quote copy paste problem…

where
bit = require(“bit”)
should be
bit = require("bit")

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4

There are a number of bit libraries around: bit, bit32, … and they are rather compatible.
I use the following snippet I found on CRC32 in pure lua - Pastebin.com so I don’t have to bother which one is used:

local function requireany(...)
  local errs = {}
  for _,name in ipairs{...} do
    if type(name) ~= 'string' then return name, '' end
    local ok, mod = pcall(require, name)
    if ok then return mod, name end
    errs[#errs+1] = mod
  end
  error(table.concat(errs, '\n'), 2)
end

-- Try to use whatever bit-manipulation library that is available
local bit, _ = requireany('bit', 'nixio.bit', 'bit32', 'bit.numberlua')
5

Hi,

I think all Veras have nixio installed. Seems quite a complete set of functions. probably should look into it a bit more.

Cheers Rene