Removing _encode internal function as it was only used by subnet mask…

… which has been removed for now.

lib/network/internal.nix

@@ -55,45 +55,6 @@ rec {
   };
 
   ipv4 = {
-    /**
-      Encodes an integer into a valid IPv4 address.
-
-      # Example
-
-      ```nix
-      _encode 0
-      => "0.0.0.0"
-      _encode 3232235521
-      => "192.168.0.1"
-      ```
-
-      # Type
-
-      ```
-      _encode :: Int -> String
-      ```
-
-      # Arguments
-
-      - [num] A decoded integer representation of an IPv4 address.
-
-      # Throws
-
-      - If the argument is less than zero.
-      - If the argument is greater than or equal to 2^32.
-    */
-    _encode =
-      num:
-      if num < 0 then
-        throw "lib.network.ipv4._encode: ${toString num} cannot be encoded into an IPv4 address."
-      # ipv4 only has 4*8 = 32 bits, so 2^32 addresses
-      else if num >= 4294967296 then
-        throw "lib.network.ipv4._encode: ${toString num} is too large to encode into an IPv4 address."
-      else
-        concatStringsSep "." (
-          map (x: toString (mod (num / x) 256)) (reverseList (genList (x: common.pow 2 (x * 8)) 4))
-        );
-
     /**
       Extracts a prefix length from a CIDR and verifies it is valid.
 

lib/network/tests.sh

@@ -109,13 +109,6 @@ expectEqual 'internal.common.pow 2 0' '1'
 expectEqual 'internal.common.pow 2 3' '8'
 expectFailure 'internal.common.pow 2 (-1)' 'lib.network.pow: Exponent cannot be negative.'
 
-# Test basic cases for encoding IPv4 address.
-expectEqual 'internal.ipv4._encode 0' '"0.0.0.0"'
-expectEqual 'internal.ipv4._encode 4294967295' '"255.255.255.255"'
-expectEqual 'internal.ipv4._encode 3232235521' '"192.168.0.1"'
-expectFailure 'internal.ipv4._encode 4294967296' 'lib.network.ipv4._encode: [[:digit:]]+ is too large to encode into an IPv4 address.'
-expectFailure 'internal.ipv4._encode (-1)' 'lib.network.ipv4._encode: -[[:digit:]]+ cannot be encoded into an IPv4 address.'
-
 # Test basic cases for verifying an address.
 expectEqual 'internal.ipv4._verifyAddress "192.168.0.1/24"' '"192.168.0.1"'
 expectFailure 'internal.ipv4._verifyAddress "192.168.0./24"' 'lib.network.ipv4: CIDR 192.168.0./24 has an empty octet.'