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From: jfjr@mitre-bedford.arpa
Newsgroups: comp.lang.c
Subject: Re: Portable Memory Allocation
Message-ID: <7759@brl-adm.ARPA>
Date: Tue, 9-Jun-87 08:14:22 EDT
Article-I.D.: brl-adm.7759
Posted: Tue Jun  9 08:14:22 1987
Date-Received: Fri, 12-Jun-87 01:53:59 EDT
Sender: news@brl-adm.ARPA
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   If you want to allocate nodes oof various sizes efficiently
use an extra level of indirection


  struct{
    int constant_part
    int type_tag
    union{
      char * pointer_to_one_thing
      char * pointer_to_another_thing
      char * pointer_to_still_another}
    }

  I've used this a couple of times in Pascal and C - as long
as you are careful especially in C to keep your types straight
it works fine

                                           Jerry Freedman,Jr
                                           jfjr@mitre-bedford.arp3/