🚀 go-pugleaf

In <1992Sep3.155835.10175@midway.uchicago.edu> pynq@midway.uchicago.edu (George Jetson) writes:
>In article <87kn3yb.westes@netcom.com> westes@netcom.com (Will Estes) writes:
>>Using the MS-DOS version of diff 1.15, I occasionally get an error
>>message reporting that memory has been exhausted (this on a machine that
>>has 15 megs of extended memory).  Do other users of the
>>MS-DOS version get the same error?  Can someone point me to an ftp site

>This tells us nothing about which specific version of diff you are using.
>Who is it from? Who compiled it? Which compiler? etc.

I'd guess GNU diff-1.15 and he compiled it himself.

Anyway, I noted a similar problem when I was forced to port GNU
egrep to MS-DOS.  I don't have the sources or my diffs on-line
so this is a touch vague.  The basic problem was that once the
initial small (16k?) buffer was outgrown, a call to realloc is
made with size set by (1 << 16) which is 64k, but guess what
happens on MS-DOS with its 16bit int's?  Yep, realloc is called
with a size of 0, causing everyone to think that there is no
memory left.

I can't recall whether I made it (1 << 15) or ((1 << 16) - 1)
(if being compiled on MSDOS) anyway that made the problem
dissappear.

Look for calls to {m,re,xm,xre}alloc and check the sizes being
used keeping in mind that you only have 16bits.

-- 
Simon J. Gerraty        <sjg@zen.void.oz.au>

#include <disclaimer>   /* imagine something _very_ witty here */