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

Latest Forum Discussions

See All

Can PokeMatch help you find love with Po...
The unofficial Pokemon GO companion app space has exploded almost as fast as the game itself over the last few weeks. Aspiring app developers, many of them working solo, have given us apps that locate Pokemon, keep track of the server status, and... | Read more »
How to get started with Prisma
If there's one thing people like to do more than taking pictures with their smartphones, it's tinkering with those photos in some way. Numerous apps have sprung up over the last several years that allow you to use filters and special effects to... | Read more »
6 Pokemon GO updates you can expect, acc...
Pokemon GO had a scheduled appearance at this year's San Diego Comic-Con for a while, but it was only relatively close to the show that it was upgraded to a spot in Hall H. That's the biggest venue at SDCC, one usually reserved for the largest... | Read more »
How to evolve Eevee in Pokemon GO
By now, almost everyone should be hip to how to evolve Pokemon in Pokemon GO (and if not, there's a guide for that). Just gather enough candy of the appropriate type, feed them all to the Pokemon, and evolution happens. It's a miracle that would... | Read more »
CSR Racing 2: Guide to all game modes
It might not seem like there are all that many ways to go fast in a straight line, but CSR Racing 2 begs to differ. [Read more] | Read more »
Bulb Boy (Games)
Bulb Boy 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: Multi-award winning 2D point & click horror adventure about a boy with a glowing head. | Read more »
5 top free emoji keyboard apps
If we're not at peak emoji yet as a society, it feels like we definitely should be. The emoji concept has gone far beyond what anyone in Japan could have envisioned when the people there unleashed it on an unsuspecting world, but the West has... | Read more »
How to unlock more characters in Disney...
One of the big charms of Disney Emoji Blitz is seeing a wide variety of beloved Disney and Pixar characters transformed into smiling emojis. Even someone like the sneaky Randall from Monsters Inc., who probably never cracked a smile on film, is... | Read more »
Cubway (Games)
Cubway 1.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0 (iTunes) Description: Cubway is a journey with an abstract story of lifecycle of rebirth, called Samsara. Guide the cube through the long way full of dangers... | Read more »
Colorcube (Games)
Colorcube 1.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0 (iTunes) Description: Turn pieces and blend colours in this minimal yet visually stunning puzzler.Over 200 handcrafted and challenging levels. Features... | Read more »

Price Scanner via MacPrices.net

External Keyboard Innovations For iPad Pro (1...
I’m an input device aficionado. With non-touchscreen computers, which includes all Macs, the keyboard and mouse or trackpad are the tactile points of interface between user and machine, and the... Read more
GSK Rheumatoid Arthritis Study Leverages iPho...
Global healthcare products company GlaxoSmithKline (GSK) says that since 2014 they have begun transforming the way they conduct research, by leveraging state-of-the-art digital technologies — a... Read more
Clearance 12-inch Retina MacBooks, Apple refu...
Apple has Certified Refurbished 2015 12″ Retina MacBooks available starting at $929. Apple will include a standard one-year warranty with each MacBook, and shipping is free. The following... Read more
13-inch Retina MacBook Pros on sale for up to...
B&H Photo has 13″ Retina MacBook Pros on sale for up to $150 off MSRP. Shipping is free, and B&H charges NY tax only: - 13″ 2.7GHz/128GB Retina MacBook Pro: $1199 $100 off MSRP - 13″ 2.7GHz/... Read more
13-inch 1.6GHz/128GB MacBook Air on sale for...
Amazon has the 13″ 1.6GHz/128GB MacBook Air on sale for $200 off MSRP for a limited time. Shipping is free: - 13″ 1.6GHz/128GB MacBook Air (sku MMGF2LL/A): $799.99 $200 off MSRP Their price is the... Read more
13-inch 1.6GHz/256GB MacBook Air on sale for...
Amazon has the 13″ 1.6GHz/256GB MacBook Air on sale for $200 off MSRP for a limited time. Shipping is free: - 13″ 1.6GHz/256GB MacBook Air (sku MMGG2LL/A): $999.99 $200 off MSRP Their price is the... Read more
Free iOS Business App notably* Helps Service...
PayStudio Inc. has introduced their new business app notably* 1.0, developed for iPhone and iPod touch. notably* was specifically developed to help service and trade professionals go digital and... Read more
27-inch iMacs on sale for $200 off MSRP
Amazon has 27″ iMacs on sale for $200 off MSRP including free shipping: - 27″ 3.3GHz iMac 5K: $2099 $200 off MSRP - 27″ 3.2GHz/1TB Fusion iMac 5K: $1799.99 $200 off MSRP - 27″ 3.2GHz/1TB HD iMac 5K... Read more
Mac Pros on sale for $200 off MSRP
B&H Photo has Mac Pros on sale for $200 off MSRP. Shipping is free, and B&H charges sales tax in NY only: - 3.7GHz 4-core Mac Pro: $2799, $200 off MSRP - 3.5GHz 6-core Mac Pro: $3799, $200... Read more
Save up to $600 with Apple refurbished Mac Pr...
Apple has Certified Refurbished Mac Pros available for up to $600 off the cost of new models. An Apple one-year warranty is included with each Mac Pro, and shipping is free. The following... Read more

Jobs Board

*Apple* Retail - Multiple Positions, Willow...
Job Description:SalesSpecialist - Retail Customer Service and SalesTransform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
*Apple* Evangelist - JAMF Software (United S...
The Apple Evangelist is responsible for building and cultivating strategic relationships with Apple 's small and mid-market business development field teams. This Read more
*Apple* Solutions Consultant - APPLE (United...
Job Summary As an Apple Solutions Consultant, you'll be the link between our future customers and our products. You'll showcase your entrepreneurial spirit as you Read more
*Apple* Professional Learning Specialist - A...
Job Summary The Apple Professional Learning Specialist is a full-time position for one year with Apple in the Phoenix, AZ area. This position requires a high Read more
*Apple* Picker - Apple Hill Orchard (United...
Apple Hill Orchard, Co. Rte. 21,Whitehall, NY 9/7/16-10/228/16. Pick fresh market or processing apples Productivity of 60 boxes and 80 boxes processing fruit per Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.