Dec 232017
 
Un-ARC facility with source in Turbo 4 format.
File DARCSQ31.ZIP from The Programmer’s Corner in
Category Pascal Source Code
Un-ARC facility with source in Turbo 4 format.
File Name File Size Zip Size Zip Type
DARCSQ31.EXE 13136 8134 deflated
DARCSQ31.PAS 28264 7474 deflated
DEARCSQ.COM 19685 13159 deflated
DEARCSQ.PAS 28971 7534 deflated
README.1ST 2044 956 deflated
README.2ND 860 504 deflated

Download File DARCSQ31.ZIP Here

Contents of the README.1ST file




A while back, I stumbled across a file called DEARC512.ARC on a
bbs that I happen to frequent. Contained in this archive was a
Turbo Pascal program for extracting files from an ARChive. While
not as fast as the more familiar ARC, ARCE, and PKXARC programs,
the source code provided me with the insights into ARC file
structure and decompression algorithms that I had been looking for
(I've always been a bit curious about things of this type). I
found something lacking in the source code, however, and that was
support for "squashed" files (as created by Phil Katz's PKARC
program).

About that time, a file called NARC11.ARC was beginning to appear
in the upload directories of many bulletin boards. This file,
created by Gary Conway, contained a program to front-end ARC with
a mouse driven menu. It also happened to contain the most
understandable documentation of ARC compression methods I had ever
encountered (thanks, Gary). Whether you use Gary's program or
not, it is well worth the download time just to have a peek at his
documentation.

With the NARC document in hand, I was able to modify the original
program (DEARC512.PAS) to include support for extraction of
"squashed" files. In doing this, I wanted to avoid, as much as
possible, changing the "flavor" of the original coding, which
actually worked quite well. For this reason, a comparison of
dearcsq.pas with dearc512.pas will reveal very few changes (e.g.,
I left the original argc and argv functions in, rather than
replace them with Turbo's ParamCount and ParamStr functions).

My thanks to Gary Conway, the original author of dearc.pas
(whoever you are) and also to Roy Collins and David W. Carroll
who have also made contributions to the upkeep of this program.



rpb
7/28/87



 December 23, 2017  Add comments

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