TweetFollow Us on Twitter

Puzzle 2: What's on the menu?

Volume Number: 19 (2003)
Issue Number: 8
Column Tag: Puzzle Page

John and Pals' Puzzle Page

Puzzle 2: What's on the menu?

by John A. Vink

Try to solve this programming puzzle before the score drops to zero. The puzzle is presented as a discussion among engineers in a chat room. As the engineers gather information and make suggestions, see if you can find the solution. If you solve the problem before you get to the end of the puzzle, you get the score in the left hand column.

SDK: I love the monotony of a steady paycheck.

Argus: Tell me about it, SDK.

100 ChrisE: OK, under what circumstances does GetNewMBar return nil?

95 BMA: No MBAR resource?

ChrisE: It's there.

90 SDK: Out of memory? Like, really out?

ChrisE: Mac OS X

SDK: Heh, mine runs out of memory all the time.

SDK: I can tell because it gets slower and console gets really talkative.

85 BMA: What's ResError and MemError have to say about it?

80 ChrisE: ResError() is 0; MemError() is 0.

BMA: Your computrons are leaking out of the bottom of the case, you need to plug it up with silicone fittings.

BMA: Is this Tuttle's machine? It's cursed, I tells you!

75 Argus: Resource not linked in?

70 Argus: Can you use GetResource on the MBAR?

ChrisE: Whaddya mean "not linked in"?

Argus: What are you really trying to do? Is the resource really available to your app?

BMA: When you said "it's there", did you look in the executable or in the project to verify?

65 ChrisE: OK, I have one project, two targets. The targets build slightly different ways, but with identical source, resources, etc.

ChrisE: One target builds and runs fine.

60 ChrisE: The other (mostly identical) target gets nil from GetNewMBar.

BMA: You got Resorcerer handy?

55 KeithS: Maybe one target requires a MDEF that isn't present in the other?

Pie R. Square: Why is ResError() 0?

50 ChrisE: I DeRez the .rsrc files in both packages and they're identical.

BMA: Bit for bit?!

45 Argus: Throw in a GetResource('MBAR', x) and see if you get a resource back.

Pie R. Square: They link to the same set of libraries?

ChrisE: OK, what's hex for MBAR? I'm in gdb.

JAV: BaseMaster says: 4D424152

BMA: For the record, print/x "MBAR" in gdb does what you want.

40 BMA: Do you load any other resources before loading the MBAR?

ChrisE: Nope.

35 KeithS: gdb ; br GetMenuBar(); call (int) GetResource ( 'MBAR', 128 ) and see if it works.

ChrisE: GetResource returns 0.

Pie R. Square: And ResErr() is 0?

ChrisE: ResError is 0.

30 Argus: ResError is volatile and can get reset quickly.

25 BMA: Your plist is hosed and your resource file is not being opened at all.

BMA: Diff the plists.

20 KeithS: call (void) PrintResourceChain(1)

BMA: Do the resource files match the app names?

15 ChrisE: Plists differ only in the name of the app, but in the one that's broken, the plist name differs from the name of its app.

BMA: There you go.

ChrisE: In the one that works they match.

ChrisE: Bravo, guys. JAV, write this up.

ChrisE: PrintResourceChain shows my .rsrc isn't there, probably because the plist has the wrong name.

10 KeithS: So CFBundle is failing to open your resource file because it's got your exectuable wrong.

BMA: Well, in your case the file itself has the wrong name, but yes.

5 ChrisE: The file has the same name as the executable, but the plist entry is different. I had changed the name in the target editor but an old name persisted in the plist.

BMA: Oh I see, I got it backwards.

ChrisE: Executes correctly now.

ChrisE: Thanks! Score:

85-100 That was pretty good. 65-80 You must have called a friend on the inside. 45-60 You've been carbonizing your apps like a good developer. 25-40 You see, GetMenuResource is a classic Mac OS API.

Score:

85-100 That was pretty good.

65-80 You must have called a friend on the inside.

45-60 You've been carbonizing your apps like a good developer.

25-40 You see, GetMenuResource is a classic Mac OS API.

0-20 Stick to Cocoa and command line apps.


John A. Vink (aka "JAV") is a software engineer for Apple Computer, Inc. He takes a break in the summer to follow INXS on tour. His pals are a bunch of smart friends scattered throughout the Mac programming landscape. You can contact him at vink@apple.com. (The pals reference makes sense with the "John And Pals' Puzzle Page" title)

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Apple macOS Sierra 10.12.3 - The latest...
With Apple macOS Sierra, Siri makes its debut on Mac, with new features designed just for the desktop. Your Mac works with iCloud and your Apple devices in smart new ways, and intelligent... Read more
Lyn 1.8.5 - Lightweight image browser an...
Lyn is a fast, lightweight image browser and viewer designed for photographers, graphic artists, and Web designers. Featuring an extremely versatile and aesthetically pleasing interface, it delivers... Read more
iClock Pro 3.4.7 - Customize your menuba...
iClock Pro is a menu bar replacement clock for Apple's default clock. iClock Pro is an update, total rewrite and improvement to the popular iClock. Have the day, date and time in different fonts and... Read more
Opera 42.0.2393.137 - High-performance W...
Opera is a fast and secure browser trusted by millions of users. With the intuitive interface, Speed Dial and visual bookmarks for organizing favorite sites, news feature with fresh, relevant content... Read more
Apple Security Update 2016-003 Supplemen...
Apple Security Update is recommended for all users and improves the security of OS X. For detailed information about the security content of this update, please visit: http://support.apple.com/kb/... Read more
Apple iOS 10.2.1 - The latest version of...
iOS 10 is the biggest release of iOS ever. A massive update to Messages brings the power of the App Store to your conversations and makes messaging more personal than ever. Find your route with... Read more
BetterTouchTool 1.992 - 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
Viber 6.5.5 - Send messages and make cal...
Viber lets you send free messages and make free calls to other Viber users, on any device and network, in any country! Viber syncs your contacts, messages and call history with your mobile device, so... Read more
Lyn 1.8.5 - Lightweight image browser an...
Lyn is a fast, lightweight image browser and viewer designed for photographers, graphic artists, and Web designers. Featuring an extremely versatile and aesthetically pleasing interface, it delivers... Read more
Apple iOS 10.2.1 - The latest version of...
iOS 10 is the biggest release of iOS ever. A massive update to Messages brings the power of the App Store to your conversations and makes messaging more personal than ever. Find your route with... Read more

Clash Royale gets some serious balance u...
| Read more »
Ironhide Game Studio prepares for a busy...
Kingdom Rush breathed fresh life into the tired tower defense genre way back in 2012. The game was a robust challenge that somehow managed to lift you up, rather than leaving you feeling crushed and hopeless. The rich array of unit types and... | Read more »
Collect pets and sling arrows in Arcane...
Mobile gaming is a crowded market, but regular updates are a good way to keep us attention-short players keen. The brand new content in Arcane Online is a prime example. Published by Japanese developer Gala, Arcane Online is a fantasy MMO that... | Read more »
Super Mario Run dashes onto Android in M...
Super Mario Run was one of the biggest mobile launches in 2016 before it was met with a lukewarm response by many. While the game itself plays a treat, it's pretty hard to swallow the steep price for the full game. With that said, Android users... | Read more »
WarFriends Beginner's Guide: How to...
Chillingo's new game, WarFriends, is finally available world wide, and so far it's a refreshing change from common mobile game trends. The game's a mix of tower defense, third person shooter, and collectible card game. There's a lot to unpack here... | Read more »
Super Gridland (Entertainment)
Super Gridland 1.0 Device: iOS Universal Category: Entertainment Price: $1.99, Version: 1.0 (iTunes) Description: Match. Build. Survive. "exquisitely tuned" - Rock Paper Shotgun No in-app purches, and no ads! | Read more »
Red's Kingdom (Games)
Red's Kingdom 1.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0 (iTunes) Description: Mad King Mac has kidnapped your father and stolen your golden nut! Solve puzzles and battle goons as you explore and battle your... | Read more »
Turbo League Guide: How to tame the cont...
| Read more »
Fire Emblem: Heroes coming to Google Pla...
Nintendo gave us our first look at Fire Emblem: Heroes, the upcoming mobile Fire Emblem game the company hinted at last year. Revealed at the Fire Emblem Direct event held today, the game will condense the series' tactical RPG combat into bite-... | Read more »
ReSlice (Music)
ReSlice 1.0 Device: iOS Universal Category: Music Price: $9.99, Version: 1.0 (iTunes) Description: Audio Slice Machine Slice your audio samples with ReSlice and create flexible musical atoms which can be triggered by MIDI notes or... | Read more »

Price Scanner via MacPrices.net

Deal alert! 13-inch 2.0GHz MacBook Pros for $...
B&H Photo has the new 2016 13″ 2.0GHz non-Touch Bar MacBook Pros in stock today and on sale for $225 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 13″ 2.0GHz MacBook Pro... Read more
Free LibreOffice Portable 5.2.4 Complete Offi...
PortableApps.com and The Document Foundation have announce the release of LibreOffice Portable 5.2.4. LibreOffice Portable is an Open Source full-featured office suite — including a word processor,... Read more
Apple Planning Three New Tablets For 2017 – D...
Digitimes’ Rebecca Kuo and Joseph Tsai say that unnamed insider sources report Apple having three new tablets in the pipeline for 2017 release: a 9.7-inch model with a friendly price range, a new mid... Read more
Roundup of 15-inch Touch Bar MacBook Pro sale...
B&H Photo has the new 2016 15″ Apple Touch Bar MacBook Pros in stock today and on sale for up to $150 off MSRP. Shipping is free, and B&H charges NY sales tax only: - 15″ 2.7GHz Touch Bar... Read more
Apple refurbished iPad Pros available for up...
Apple has Certified Refurbished 9″ and 12″ Apple iPad Pros available for up to $160 off the cost of new iPads. An Apple one-year warranty is included with each model, and shipping is free: - 32GB 9″... Read more
16GB iPad Air 2, Apple refurbished, available...
Apple has Certified Refurbished 16GB iPad Air 2s available for $319 including free shipping. A standard Apple one-year is included. Their price is $60 off original MSRP for this model. Read more
Apple iMacs on sale for up to $120 off MSRP
B&H Photo has 21″ and 27″ Apple iMacs on sale for up to $120 off MSRP, each including free shipping plus NY sales tax only: - 27″ 3.3GHz iMac 5K: $2199 $100 off MSRP - 27″ 3.2GHz/1TB Fusion iMac... Read more
Apple refurbished Apple TVs available for up...
Apple has Certified Refurbished 32GB and 64GB Apple TVs available for up to $30 off the cost of new models. Apple’s standard one-year warranty is included with each model, and shipping is free: -... Read more
Save up to $350 with Apple Certified Refurbis...
Apple has Certified Refurbished 2015 21″ & 27″ iMacs available for up to $350 off MSRP. Apple’s one-year warranty is standard, and shipping is free. The following models are available: - 21″ 3.... Read more
2015 12-inch Retina MacBooks, Apple refurbish...
Apple has Certified Refurbished 2015 12″ Retina MacBooks available for up to $410 off original MSRP. Apple will include a standard one-year warranty with each MacBook, and shipping is free. The... Read more

Jobs Board

*Apple* & PC Desktop Support Technician...
Apple & PC Desktop Support Technician job in Manhattan, NY Introduction: We have immediate job openings for several Desktop Support Technicians with one of our most Read more
*Apple* & PC Desktop Support Technician...
Apple & PC Desktop Support Technician job in Stamford, CT We have immediate job openings for several Desktop Support Technicians with one of our most well-known Read more
*Apple* Retail - Multiple Positions - Apple,...
Job Description: Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
*Apple* Site Security Manager - Apple (Unite...
# Apple Site Security Manager Job Number: 54692472 Culver City, California, United States Posted: Jan. 19, 2017 Weekly Hours: 40.00 **Job Summary** The Apple Read more
*Apple* macOS Systems Integration Administra...
…most exceptional support available in the industry. SCI is seeking an Junior Apple macOS systems integration administrator that will be responsible for providing Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.