From: "Filip Sielimowicz" <sielim AT wp DOT pl>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: MD5 hash (or something like it)?
Date: Mon, 22 Jul 2002 10:06:03 +0200
Organization: ASK NorthPark http://www.npnet.org
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To: djgpp AT delorie DOT com
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> > Does anyone know a quick way of generating an MD5 hash (or something
> > similar..  some sort of checksum) for a string?  Been looking around on
> the
> > net, but not finding a lot ..
> >
>
> Really ?
> http://www.google.com.pl/search?q=md5sum&ie=ISO-8859-2&hl=pl
>
> If you want some sources just look for files md5sum.c:
>
> http://www.google.com.pl/search?hl=pl&inlang=pl&ie=ISO-8859-2&q=md5sum.c
>


But if you want only some simple checksum for the string use just bitwise
xor function(operator)
or just adding with +:

char* mystring="blebleble";
char checksum=0;
int i;
for (i=0;i<strlen(mystring);i++)
 checksum=checksum^mystring[i];

(im not sure if there's ^= operator, may be "checksum^=mystring[i] is
enough)


elim
----