BitwiseIp.Mask.encode
You're seeing just the function
encode
, go back to BitwiseIp.Mask module for more information.
Specs
Encodes an integer prefix length as a bitmask.
Given the protocol (either :v4
or :v6
) and the number of leading ones in
the prefix, this function looks up the corresponding bitmask. The function is
only defined on valid prefix lengths: between 0 and 32 for IPv4 and between 0
and 128 for IPv6. To undo this conversion, use decode/2
.
Examples
iex> BitwiseIp.Mask.encode(:v4, 12)
4293918720
iex> BitwiseIp.Mask.encode(:v6, 12)
340199290171201906221318119490500689920
iex> BitwiseIp.Mask.encode(:v4, 128)
** (FunctionClauseError) no function clause matching in BitwiseIp.Mask.encode/2
iex> BitwiseIp.Mask.encode(:v6, -12)
** (FunctionClauseError) no function clause matching in BitwiseIp.Mask.encode/2