TweetFollow Us on Twitter

Jun 94 Tips
Volume Number:10
Issue Number:6
Column Tag:Tips & Tidbits

Tips & Tidbits

By Scott T Boyd, Editor

Note: Source code files accompanying article are located on MacTech CD-ROM or source code disks.

Tip Of The Month

MPW Quoting Time Saver

Every self respecting Mac programmer knows that in MPW, string literals and shell variables containing spaces must be quoted. What many experienced shell users don’t know is that the option-space character, which looks just like a regular space, bypasses this requirement when dealing with the file system. Amaze your friends by typing Directory "{Boot}"Desktop Folder without any quotes (slip in that option-space while they’re not looking). It’s a great time saver and party ice breaker!

Without an option-space:

Directory "{Boot}"desktop folder

### Directory - Too many parameters were specified.

# Usage - Directory [-q | directory]

With an option-space, no error is returned:

Directory "{Boot}"Desktop Folder

- Paul Mercer

mercer@netcom.com

Spread the word about things you know that others could benefit from knowing! Send

us your tips and tidbits, especially programming-related tips. We’re also looking for user tips particularly useful to programmers .

MacTech Magazine will pay $25 for every tip used, and $50 for the Tip of the Month. You can take your award in orders or subscriptions if you prefer.

To submit a tip, send it in by e-mail. (Please make sure your code compiles). See page two for our addresses.

Slimming down “fat binaries” with MPW

Fat binaries contain both Macintosh 68K and PowerPC code, so they can run on any Mac hardware and take advantage of whatever processor is present.

A fat binary contains 68K executable 'CODE' resources and other standard Mac resources in the resource fork, and PowerPC Executable Format (PEF) code in the data fork. It also includes a 'cfrg' resource, to tell a Power Mac to ignore CODE resources at startup and look for PEF code in the data fork. A 68K Mac ignores the 'cfrg' resource and PEF code, using the 'CODE' resources instead.

This is fine for developers who only want to ship only one version of their product, and for users who want to be able to just click and go on any system, even when file-sharing across a network mixed with 68K and Power Macs. But lone power users with limited disk space may wish to perform liposuction on fat binaries, and MPW makes it easy.

To convert a fat binary to a “68K only”application:


/* 1 */
# MPW Script "To68K"
  If {#} != 1
    Echo "# Usage: {0} fat_application_name"
  Else
    Derez -skip cfrg "{1}" | Rez -o "{1}" # eliminate 'cfrg' resource
    Duplicate -y -r "{1}" "{1}.temp"      # eliminate data fork
    Rename -y "{1}.temp" "{1}"            # replace original file
  End

To convert a fat binary into a “Power Mac only” application:


/* 2 */
# MPW Script "ToPowerMac"
  If {#} != 1
    Echo "# Usage: {0} fat_application_name"
  Else
    Derez -skip CODE "{1}" | Rez -o "{1}" # eliminate 'CODE' resources
  End

Caveats: Neither of these scripts check if they are really operating on a fat binary, nor do they know whether a native version might need one or more CODEsegments, so be careful how you apply them, and please don’t perform surgery on your only copy of any file!

- Lee David Rimar, Absoft Corporation

Ever heard of setkey?

I’m just amazed at some of the SmartFriends™ I know who haven’t heard of SetKey, an MPW command that has been around for quite some time. It just goes to show how few people read release notes or manuals for MPW. Maybe it’s just that these people all worked at Apple, where coming by production versions of manuals can be enough of a chore that it’s not worth the trouble.

At any rate, SetKey lets you attach a script to any key or key combination on your keyboard, even the function keys on the extended keyboard. So tip #1 is to try out SetKey. SetKey uses the following syntax:


/* 3 */
SetKey <empty> | -r | [modifierkey-] key[-modifierkey-] key] [string]
    modifierkey = command | option | shift | control
    -r          # revert to the default key assignments

Tip #2 is to enter SetKey in a shell window, and see what’s already set. You might be surprised at some of the things MPWalready knows how to do with key combinations.

Function keys are F1-F15. Other keys are referenced by name, such as the following:


/* 4 */
setkey Option-Command-Downarrow         MoveEndOfFile
setkey Option-Command-Uparrow           MoveStartOfFile
setkey Option-Shift-Delete              Beep
setkey Option-Shift-Escape              Beep
setkey Option-Shift-Clear               'Clear § "{active}"'
setkey Option-Shift-Del                 Beep
setkey Option-Shift-Leftarrow           SelectWordLeft

For Tip #3 and following, here are some scripts Iuse a lot:

• To mark the current selection in the active window, Iuse function key F8.


/* 5 */
# mark current selection in the Active window
setkey F8   'Mark § "`Catenate "{Active}".§`" "{Active}" -y'

• Here’s a fun one. It sorts the current selection.


/* 6 */
# sort the current selection in the Active window
SetKey F12 'sort  -o "{SysTempFolder}MPW.Scratch" 
 "{Active}".§ ;  
     catenate "{SysTempFolder}MPW.Scratch" > "{Active}".§ ;  
     delete   "{SysTempFolder}MPW.Scratch"'

• Finally, here are three simple scripts Iuse frequently. I add them to a new menu, and Igive that menu the cloverleaf character from the command key as a title. The first line sets a variable to have the value of the cloverleaf character. Where you see the cloverleaf below, you’ll probably see a n character when you type control-Q.


/* 7 */
Set Key Cmd   # cloverleaf = ctl-Q

This one compiles the current selection, then dumps the object code that the C compiler generated.


/* 8 */
AddMenu {Key} 'C->DumpObj §'  'C "{Active}.§" -mc68020 -mbg 
 off -o "{SysTempFolder}temp.c.o"; 
 DumpObj "{SysTempFolder}temp.c.o" -co'

This one assembles the current selection, then dumps the resulting object code.


/* 9 */
AddMenu {Key} 'Asm->DumpObj §'  'Asm "{Active}.§" 
 -o "{SysTempFolder}temp.c.o"; 
     DumpObj "{SysTempFolder}temp.c.o" -co'
This one compares the current selection in the active window to the selection 
in the target window.

/* 10 */
AddMenu {Key} 'Compare {Active}.§ §'  
 'Compare "{Active}.§" "{Target}.§" >> "{Worksheet}"'

- Gordon Sheridan, General Magic

Assembling kährs

When putting together a Kährs wood plank floor, go ahead and shell out the thirty dollars or so for the “pull-up” tool. It’s not entirely obvious why you’d need it when you first start putting the floor together, although it looks like it might be handy to cinch up planks once you have the whole row down. It turns out not to help for that (the friction is simply too great along the length of the plank), but it does wonders when you start laying the last couple of rows. Up to that point, you can just use a tap-block and a mallet to tighten the new plank against the previous row. Once you get close to the far wall, though, there’s no room to swing the mallet, much less place the tap-block. The pull-up tool fits into the groove which is right against the wall, and gives you some room to swing the mallet, and pull the board into place.

- Al Borland, Chicago, IL

[Thanks for the tip, Al. It’s definitely better than putting a hole in the drywall with a prybar. You might want to send this tip to HomeTech Magazine as well - I understand they give away a free can of putty!. - Ed kag]

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Firetask Pro 4.2.2 - Innovative task man...
Firetask Pro uniquely combines the advantages of classical priority-and-due-date-based task management with GTD. Stay focused and on top of your commitments - Firetask Pro's "Today" view shows all... Read more
Bookends 13.4.3 - Reference management a...
Bookends is a full-featured bibliography/reference and information-management system for students and professionals. Bookends uses the cloud to sync reference libraries on all the Macs you use.... Read more
LibreOffice 6.4.5.2 - Free, open-source...
LibreOffice is an office suite (word processor, spreadsheet, presentations, drawing tool) compatible with other major office suites. The Document Foundation is coordinating development and... Read more
Thunderbird 68.10.0 - Email client from...
As of July 2012, Thunderbird has transitioned to a new governance model, with new features being developed by the broader free software and open source community, and security fixes and improvements... Read more
Firefox 78.0.1 - Fast, safe Web browser.
Firefox offers a fast, safe Web browsing experience. Browse quickly, securely, and effortlessly. With its industry-leading features, Firefox is the choice of Web development professionals and casual... Read more
BetterTouchTool 3.389 - Customize multi-...
BetterTouchTool adds many new, fully customizable gestures to the Magic Mouse, Multi-Touch MacBook trackpad, and Magic Trackpad. These gestures are customizable: Magic Mouse: Pinch in / out (zoom)... Read more
Slack 4.7.0 - Collaborative communicatio...
Slack brings team communication and collaboration into one place so you can get more work done, whether you belong to a large enterprise or a small business. Check off your to-do list and move your... Read more
OsiriX Lite 11.0.3 - 3D medical image pr...
OsiriX Lite is an image processing software dedicated to DICOM images (".dcm" / ".DCM" extension) produced by medical equipment (MRI, CT, PET, PET-CT, ...) and confocal microscopy (LSM and BioRAD-PIC... Read more
Wireshark 3.2.5 - Network protocol analy...
Wireshark is one of the world's foremost network protocol analyzers, and is the standard in many parts of the industry. It is the continuation of a project that started in 1998. Hundreds of... Read more
Dabble 1.6.1 - Organize your manuscript,...
Dabble organizes your manuscript, story notes, and plot. Dabble simplifies the story, leaving more room in your brain to create, which is what being a writer is really about. Organize your story.... Read more

Latest Forum Discussions

See All

Pokemon Go's July Community Day wil...
Pokemon Go developers have announced the details concerning the upcoming Gastly Community Day. This particular event was selected by the players of the game after the Gas Pokemon came in second place after a poll that decided which Pokemon would... | Read more »
Clash Royale: The Road to Legendary Aren...
Supercell recently celebrated its 10th anniversary and their best title, Clash Royale, is as good as it's ever been. Even for lapsed players, returning to the game is as easy as can be. If you want to join us in picking the game back up, we've put... | Read more »
Detective Di is a point-and-click murder...
Detective Di is a point-and-click murder mystery set in Tang Dynasty-era China. You'll take on the role of China's best-known investigator, Di Renjie, as he solves a series of grisly murders that will ultimately lead him on a collision course with... | Read more »
Dissidia Final Fantasy Opera Omnia is se...
Dissidia Final Fantasy Opera Omnia, one of Square Enix's many popular mobile RPGs, has announced a plethora of in-game events that are set to take place over the summer. This will include several rewards, Free Multi Draws and more. [Read more] | Read more »
Sphaze is a neat-looking puzzler where y...
Sphaze is a neat-looking puzzler where you'll work to guide robots through increasingly elaborate mazes. It's set in a visually distinct world that's equal parts fantasy and sci-fi, and it's finally launched today for iOS and Android devices. [... | Read more »
Apple Arcade is in trouble
Yesterday, Bloomberg reported that Apple is disappointed in the performance of Apple Arcade and will be shifting their approach to the service by focusing on games that can retain subscribers and canceling other upcoming releases that don't fit... | Read more »
Pixel Petz, an inventive platform for de...
Pixel Petz has built up a sizeable player base thanks to its layered, easy-to-understand creative tools and friendly social experience. It revolves around designing, trading, and playing with a unique collection of pixel art pets, and it's out now... | Read more »
The King of Fighters Allstar's late...
The King of Fighters ALLSTAR, Netmarble's popular action RPG, has once again been updated with a plethora of new content. This includes battle cards, events and 21 new fighters, which increases the already sizeable roster even more. [Read more] | Read more »
Romancing SaGa Re;univerSe, the mobile s...
Square Enix latest mobile spin-off Romancing SaGa Re;univerSe is available now globally for both iOS and Android. It initially launched in Japan back in 2018 where it's proven to be incredibly popular, so now folks in the West can finally see what... | Read more »
Away: Journey to the Unexpected is a sto...
Away: Journey to the Unexpected looks really quite lovely. Stylish, cute, and clearly heavily inspired by Japanese animation, it's amongst the best-looking mobile games on the horizon. Developed by a two-person team, this story-driven rogue-lite... | Read more »

Price Scanner via MacPrices.net

July 4th Sale: Woot offers wide range of Macs...
Amazon-owned Woot is blowing out a wide range of Apple Macs and iPads for July 4th staring at $279 and ranging up to just over $1000. Models vary from older iPads and 11″ MacBook Airs to some newer... Read more
Apple Pro Display XDR with Nano-Texture Glass...
Abt Electronics has Apple’s new 32″ Pro Display XDR model with the nano-texture glass in stock and on sale today for up to $144 off MSRP. Shipping is free: – Pro Display XDR (nano-texture glass): $... Read more
New 2020 Mac mini on sale for up to $100 off...
Amazon has Apple’s new 2020 Mac minis on sale today for $40-$100 off MSRP with prices starting at $759. Shipping is free: – 2020 4-Core Mac mini: $759 $40 off MSRP – 2020 6-Core Mac mini: $998.99 $... Read more
July 4th Sale: $100 off every 2020 13″ MacBoo...
Apple resellers have new 2020 13″ MacBook Airs on sale for $100 off Apple’s MSRP as part of their July 4th sales. Starting at $899, these are the cheapest new 2020 MacBooks for sale anywhere: (1) B... Read more
This hidden deal on Apple’s site can save you...
Are you a local, state, or federal government employee? If so, Apple offers special government pricing on their products, including AirPods, for you as well as immediate family members. Here’s how... Read more
Apple Watch Series 3 models on sale for new l...
Amazon has Apple Watch Series 3 GPS models on sale for $30 off MSRP, starting at only $169. Their prices are the lowest available for these models from any Apple reseller. Choose Amazon as the seller... Read more
Deal Alert! Get these refurbished 2018 13″ Ma...
Apple has restocked and lowered prices on select Certified Refurbished 2018 13″ MacBook Airs, starting at only $679. Each MacBook features a new outer case, comes with a standard Apple one-year... Read more
July 4th Sale: 13″ 2.0GHz MacBook Pros for $2...
B&H Photo has new 2020 13″ 2.0GHz MacBook Pros on sale for $200 off Apple’s MSRP as part of their July 4th sale. Prices start at $1599. These are the same MacBook Pros sold by Apple in their... Read more
July 1 only: $100 off Apple iPhone 11, 11 Pro...
Boost Mobile is offering Apple iPhone 11, 11 Pro, and iPhone 11 Pro Max models for $100 off MSRP with service. Their discount reduces the cost of an iPhone 11/64GB to $599, iPhone 11 Pro to $899 for... Read more
Apple offers $50-$100 Education discount on i...
Purchase a new 12.9″ or 11″ iPad Pro at Apple using your Education discount, and Apple will take $50-$100 off their MSRP. All teachers, students, and staff of any educational institution with a .edu... Read more

Jobs Board

Operating Room Assistant, *Apple* Hill Surg...
Operating Room Assistant, Apple Hill Surgical Center - Full Time, Day Shift, Monday - Saturday availability required Tracking Code 62363 Job Description Operating Read more
Perioperative RN - ( *Apple* Hill Surgical C...
Perioperative RN - ( Apple Hill Surgical Center) Tracking Code 60593 Job Description Monday - Friday - Full Time Days Possible Saturdays General Summary: Under the Read more
Product Manager, *Apple* Commercial Sales -...
Product Manager, Apple Commercial Sales Austin, TX, US Requisition Number:77652 As an Apple Product Manager for the Commercial Sales team at Insight, you Read more
*Apple* Mac Product Engineer - Barclays (Uni...
Apple Mac EngineerWhippany, NJ Support the development and delivery of solutions, products, and capabilities into the Barclays environment working across technical Read more
Blue *Apple* Cafe Student Worker - Pennsylv...
…enhance your work experience. Student positions are available at the Blue Apple Cafe. Employee meal discount during working hours. Duties include food preparation, Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.