Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!uwm.edu!rpi!batcomputer!cornell!uw-beaver!sumax!ole!ray
From: ray@ole.UUCP (Ray Berry)
Newsgroups: comp.binaries.ibm.pc.d
Subject: Re: which archiver/compresser and encoder/decoder to use?
Summary: geez- useful info
Message-ID: <1524@ole.UUCP>
Date: 21 Feb 90 23:32:35 GMT
References: <36517@iuvax.cs.indiana.edu> <32123@shemp.CS.UCLA.EDU>
Organization: Seattle Silicon Corp., Bellevue, WA.
Lines: 27

In article <32123@shemp.CS.UCLA.EDU> wales@CS.UCLA.EDU (Rich Wales) writes:

-- XXENCODE uses the following function --
#define ENC(c) ( set[ (c) & 077 ] )
static char set[] = 
    "+-0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";

Except for the character set used, the two programs are identical.
<end of quote>

   Kudos to Rich for contributing useful data.  Similarly,
static unsigned char xx[] = {
	255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
	255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
	255,255,255,255,255,255,255,255,255,0,255,1,255,255,2,3,4,5,6,7,8,
	9,10,11,255,255,255,255,255,255,255,12,13,14,15,16,17,18,19,20,21,
	22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,255,255,255,255,255,
	255,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,
	59,60,61,62,63,255,255,255,255,255};
/*  array 'xx' has 128 members */
#define DEC(c)	xx[(c)&127]

would seem to transform uudecode into xxdecode.  I offer this not as a 
profound intellectual divination, but simply for those too lazy to type.
-- 
Ray Berry  kb7ht  uucp: ...ole!ray CIS: 73407,3152 /* "inquire within" */
Seattle Silicon Corp. 3075 112th Ave NE. Bellevue WA 98004 (206) 828-4422