Parse an IP Address

Parse an IP Address is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.

The purpose of this task is to demonstrate parsing of text-format IP addresses, using IPv4 and IPv6. The task itself should be trivial, the role of this page is primarily informative.

Taking the following as inputs:

127.0.0.1	The "localhost" IPv4 address
127.0.0.1:80	The "localhost" IPv4 address, with a specified port (80)
::1	The "localhost" IPv6 address
[::1]:80	The "localhost" IPv6 address, with a specified port (80)
2605:2700:0:3::4713:93e3	Rosetta Code's primary server's public IPv6 address
[2605:2700:0:3::4713:93e3]:80	Rosetta Code's primary server's public IPv6 address, with a specified port (80)

Emit each described IP address as a decimal integer and as hexadecimal integer, indicating the port number specified, if any.

PicoLisp

<lang PicoLisp># Return a cons pair of address and port: (address . port) (de ipAddress (Adr)

  (use (@A @B @C @D @Port)
     (cond
        ((match '("[" @A "]" ":" @Port) Adr)
           (adrIPv6 (split @A ":") @Port) )
        ((match '("[" @A "]") Adr)
           (adrIPv6 (split @A ":")) )
        ((match '(@A ":" @B ":" @C) Adr)
           (adrIPv6 (cons @A @B (split @C ":"))) )
        ((match '(@A "." @B "." @C "." @D ":" @Port) Adr)
           (adrIPv4 (list @A @B @C @D) @Port) )
        ((match '(@A "." @B "." @C "." @D) Adr)
           (adrIPv4 (list @A @B @C @D)) )
        (T (quit "Bad IP address" (pack Adr))) ) ) )

(de adrIPv4 (Lst Port)

  (cons
     (sum >> (-24 -16 -8 0) (mapcar format Lst))
     (format Port) ) )

(de adrIPv6 (Lst Port)

  (cons
     (sum >>
        (-112 -96 -80 -64 -48 -32 -16 0)
        (mapcan
           '((X)
              (if X
                 (cons (hex X))
                 (need (- 9 (length Lst)) 0) ) )  # Handle '::'
           (cons (or (car Lst) "0") (cdr Lst)) ) )
     (format Port) ) )</lang>

Test: <lang PicoLisp>(for A

  (quote
     "127.0.0.1"
     "127.0.0.1:80"
     "::1"
     "[::1]:80"
     "2605:2700:0:3::4713:93e3"
     "[2605:2700:0:3::4713:93e3]:80" )
  (println (ipAddress (chop A))) )</lang>

Output:

(2130706433)
(2130706433 . 80)
(1)
(1 . 80)
(50537416338094019778974086937420469219)
(50537416338094019778974086937420469219 . 80)