Re: Sorting IP addresses
Re: Sorting IP addresses
- Subject: Re: Sorting IP addresses
- From: Doug McNutt <email@hidden>
- Date: Wed, 17 Dec 2003 10:56:52 -0700
At 07:37 -0700 12/17/03, Marconi wrote:
>
Given a list of IP addresses, I need to sort them in proper (ascending) order. That is, I need a routine which knows that 205.192.32.45 comes AFTER 65.163.82.130 and so forth.
A warning about something you should NOT do:
Don't try adding leading zeros to those quads in a way that will show up in the source. The last two quads in 205.192.032.045 will be interpreted as octal numbers in compliance with C language defaults by IP software.
You can convert each quad to a number multiplying the first by 256*256*256, the second by 256*256 and so on then adding the results to get a sorting number. Be careful though. AppleScript will not allow you to use a 32 bit unsigned integer and will convert to floating point. It'll probably be OK.
--
--> There are 10 kinds of people: those who understand binary, and those who don't <--
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