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MANUAL.DOC
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1992-06-16
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Visual Compare
Version 1.52
A file comparison utility for programmers.
Copyright Notice
Copyright (C) John R. Whitney 1991, 1992
All rights reserved.
Trademarks
CompuServe is a registered trademark of CompuServe, Inc.
IBM is a registered trademark of International Business Machines
Corporation.
Lotus is a registered trademark of Lotus Development Corporation.
Intel is a registered trademark of Intel Corporation.
Microsoft is a registered trademark of Microsoft Corporation.
Disclaimer and Agreement
Visual Compare is supplied as is, without any warranty. To the
extent permitted under applicable law, Whitney Software, Inc.
disclaims all warranties, either express or implied, including but
not limited to implied warranties of merchantability and fitness for
a particular purpose.
In no event shall Whitney Software, Inc. be liable for any damages
whatsoever (including, without limitation, damages for loss of
business profits, business interruption, loss of business
information, or other pecuniary loss) arising out of the use of or
inability to use this Whitney Software, Inc. product, even if Whitney
Software, Inc. has been advised of the possibility of such damages.
Some states do not allow the exclusion of liability for consequential
or incidental damages, so the above limitation may not apply to you.
Visual Compare is a "shareware program" and is provided at no charge
to the user for evaluation. Feel free to share it with your friends,
but you may not give it away altered or as part of another system.
The essence of "user-supported" software is to provide personal
computer users with quality software without high prices, and yet to
provide incentive for programmers to continue to develop new
products. If you find this program useful and find that you are
using Visual Compare and continue to use Visual Compare after a
reasonable trial period, you must make a registration payment of $30
to Whitney Software, Inc. The $30 registration fee will license one
copy for use on any one computer at any one time. You must treat
this software just like a book. An example is that this software may
be used by any number of people and may be freely moved from one
computer location to another, so long as there is no possibility of
it being used at one location while it's being used at another. Just
as a book cannot be read by two different people at the same time.
Commercial users of Visual Compare must register and pay for their
copies of Visual Compare within 30 days of first use or their license
is withdrawn. See the file LICENSE.DOC for a site-license agreement.
Anyone distributing Visual Compare for any kind of remuneration must
first contact Whitney Software, Inc. for authorization. This
authorization will be automatically granted to distributors
recognized by the Association of Shareware Professionals as adhering
to its guidelines for shareware distributors, and such distributors
may begin offering Visual Compare immediately, however Whitney
Software, Inc. must still be advised so that the distributor can be
kept up-to-date with the latest version of Visual Compare. A
distribution fee for distributing Visual Compare may not exceed $10.
You are encouraged to pass a copy of Visual Compare along to your
friends for evaluation. Please encourage them to register their copy
if they find that they can use it. All registered users will receive
a copy of the latest version of Visual Compare and notice of updates
to Visual Compare.
Technical Support
If you have any questions, comments, or suggestions regarding Visual
Compare, please send a CompuServe message via CompuServe MAIL to
70661,3463 or write:
Whitney Software, Inc.
P.O. Box 4999
Walnut Creek, CA 94596 USA
_______
____|__ | (R)
--| | |-------------------
| ____|__ | Association of
| | |_| Shareware
|__| o | Professionals
-----| | |---------------------
|___|___| MEMBER
ASP Ombudsman Statement
This program is produced by a member of the Association of Shareware
Professionals (ASP). ASP wants to make sure that the shareware
principle works for you. If you are unable to resolve a
shareware-related problem with an ASP member by contacting the member
directly, ASP may be able to help. The ASP Ombudsman can help you
resolve a dispute or problem with an ASP member, but does not provide
technical support for members' products.
Please write to the ASP Ombudsman at:
ASP Ombudsman
545 Grover Road
Muskegon, MI 49442-9427 USA
or send a CompuServe message via CompuServe MAIL to ASP Ombudsman
70007,3536.
Table of Contents
_____________________________________________________________________
Introduction ...................................................... 1
Starting Visual Compare ........................................... 2
Visual Mode ...................................................... 14
Miscellaneous Notes .............................................. 15
Version History .................................................. 16
Introduction 1
_____________________________________________________________________
This manual describes how to use the Visual Compare program to
compare two program source files. This manual and the Visual Compare
program were written for programmers.
Using Visual Compare's visual mode you can easily see the differences
between two program source files and you can also selectively discard
differences in order to quickly undo some of the changes that were
made.
Visual Compare requires an IBM Personal Computer or 100% compatible
running DOS version 2.1 or later.
Visual Compare uses a comparison algorithm that has been
mathematically proven to always produce a shortest possible sequence
of insertions and deletions that will convert file one to file two.
Starting Visual Compare 2
_____________________________________________________________________
There are two ways to control the start of Visual Compare:
1. Through arguments specified on the Visual Compare command line.
2. Through commands specified in the Visual Compare initialization
file.
Visual Compare Command Line
Run Visual Compare with no arguments to see a list of the available
command line arguments or to have Visual Compare prompt for
arguments.
The form of the Visual Compare command line is as follows:
VCOMP fileone filetwo [options]
VCOMP
The name of the program module.
fileone
The first of two files you wish to compare.
filetwo
The second of two files you wish to compare.
If fileone or filetwo ends with a backslash (\) or colon (:) symbol,
the filename (file name and optional extension) from th