Xref: utzoo comp.std.c:961 comp.lang.c:17294
Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!ig!arizona!gmt
From: gmt@arizona.edu (Gregg Townsend)
Newsgroups: comp.std.c,comp.lang.c
Subject: Re: realloc
Message-ID: <9974@megaron.arizona.edu>
Date: 30 Mar 89 18:40:10 GMT
References: <10170@bloom-beacon.MIT.EDU> <10032@ihlpb.ATT.COM> <1002@calvin.EE.CORNELL.EDU>
Reply-To: gmt@arizona.edu (Gregg Townsend)
Organization: U of Arizona CS Dept, Tucson
Lines: 7

realloc() is sometimes used to grow a list of objects as entries are added. 
If it's to be used with an initially empty list, realloc() must accept a null
pointer as its frist argument -- because ANSI C allows malloc() to return NULL
in response to a request of size zero!

    Gregg Townsend / Computer Science Dept / Univ of Arizona / Tucson, AZ 85721
    +1 602 621 4325      gmt@Arizona.EDU       110 57 16 W / 32 13 45 N / +758m