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.


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 (The pals reference makes sense with the "John And Pals' Puzzle Page" title)


Community Search:
MacTech Search:

Software Updates via MacUpdate

The best games like Animal Crossing on m...
Animal Crossing amiibo Festival is out right now for the Wii U, reminding us of just how much fun that world can be. Or at least to go back and check in on our villages once in a while. [Read more] | Read more »
Between 2 Taps - Tap for Tap interview M...
Hello, and welcome back to Between 2 Taps, Tap for Tap’s Indie Dev interview series. [Read more] | Read more »
Facility 47 (Games)
Facility 47 1.0.1 Device: iOS Universal Category: Games Price: $3.99, Version: 1.0.1 (iTunes) Description: You wake up alone and freezing in an icy cell. You try the cell door but it’s locked, it seems that you are stuck with no... | Read more »
The best Photoshop alternative on iPad
Instagram and Lightroom are great and all, but sometimes people need to get extra creative with their image editing.Like, Photoshop creative. If you're one of these people, take a look at our pick for the best mobile Photoshop experience on iPad... | Read more »
The Walking Dead: No Man’s Land guide -...
A new update for The Walking Dead: No Man’s Land was released last week, making it the perfect time for you to head back to your base and take out some walkers. Here’s the lowdown on what’s new to the game, and how to take advantage. [Read more] | Read more »
Goat Rider guide - Tips and tricks to st...
We've all been there. One second, we're riding high on a crazed goat, and the next, we've been tossed off it like someone who's no good at goat ridin'. [Read more] | Read more »
Real Boxing 2 CREED: How to become a gre...
Just in time for Rocky fans who can’t wait to see CREED, the latest movie, we have the official tie-in game,Real Boxing 2 CREED. It builds on the success of its predecessor and there’s lots to take in so we at 148apps thought we’d run you through... | Read more »
CoinOp Heroes 2 guide - How to build an...
CoinOp Heroes 2 justlaunched and, like all clickers, it's dangerously addictive stuff. You have to furiously tap your screen to defeat wave after wave of foes and earn an insane amount of cash to spend on character upgrades and an army of minions... | Read more »
Dr. Panda Firefighters (Education)
Dr. Panda Firefighters 1.0.1 Device: iOS Universal Category: Education Price: $2.99, Version: 1.0.1 (iTunes) Description: FIGHT FIRES AND SAVE THE DAY!Work together with Dr. Panda and his firefighting team to rescue his trapped... | Read more »
Puddle + (Games)
Puddle + 1.0 Device: iOS iPhone Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: Puddle is back in a new "+" edition featuring enhanced graphics, new videos and Apple TV support ! No IAP and No Ads. Dive into Puddle... | Read more »

Price Scanner via

Save $30-$40 on new Apple TVs after rebate
Adorama has new Apple TVs on sale for up to $40 off MSRP after mail-in rebate, good through December 15th. Shipping is free, and Adorama charges NY & NJ sales tax only: - 32GB Apple TV: $119.99... Read more
13-Inch Haswell MacBook Air At Two Years – Th...
The 13-inch mid-2013 “Haswell” MacBook Air I ordered in Apple’s November 2013 Black Friday sale was my first new Mac in four and a half years — the longest interval I’ve gone between system upgrades... Read more
Target Black Friday Early Access deals: $100...
Target is offering early access to their Black Friday deals on Apple products on their online store for today, the 25th, only. Choose free shipping or free local store pickup (if available): - Apple... Read more
BlackBerry Q3 Mobility Index Report Finds iOS...
BlackBerry has announced results of its thirteenth Good Mobility Index Report, showing that organizations are increasingly building custom secure apps. Among Good Powered by BlackBerry (formerly Good... Read more
Wednesday roundup of early Black Friday Mac s...
Save up to $500 on a new Mac with these early Black Friday deals from Apple resellers, currently the lowest prices available for these models: (1) B&H Photo has all new Macs on sale for up to $... Read more
iPod nano on sale for $119, $30 off MSRP
Walmart has the 16GB iPod nano (various colors) on sale for $119.20 on their online store for a limited time. That’s $30 off MSRP. Choose free shipping or free local store pickup (if available). Sale... Read more
Adorama Black Friday deals: Up to $400 off Ma...
Adorama has released their Black Friday deals for 2015. Save up to $400 on MacBook Pros, $200 on MacBooks and MacBook Airs, and $270 on iMacs. Use code RYBFDEAL during checkout to see these prices.... Read more
B&H Photo Deals: $200 off 12-inch 1.2GHz...
In addition to the B&H Photo Black Friday week sales we posted yesterday, B&H has lowered their price on two products to $200 off MSRP: - 12″ 1.2GHz Gray Retina MacBook: $1399 save $200 - 13... Read more
Best Buy Early Access: Today only, Up to $125...
Best Buy has iPad Air 2s on sale for up to $125 off MSRP and Apple Watch models on sale on their online store for up to $100 off MSRP with special codes through midnight CT tonight. Choose free... Read more
UPPERCASE DESIGNS Premium Ultra Thin Keyboard...
UPPERCASE Designs today announced its new Premium Ultra Thin Keyboard Protector and its Palm Rest Protector Set for the 12-inch MacBook. The accessories provide durable protection for the 12-inch... Read more

Jobs Board

Hardware Systems Integration Engineer - *App...
# Hardware Systems Integration Engineer - Apple Watch Job Number: 39380139 Santa Clara Valley, Califo ia, United States Posted: Apr. 23, 2015 Weekly Hours: **Job Read more
Sr. Technical/Project Manager, *Apple* Educ...
# Sr. Technical/Project Manager, Apple Education Job Number: 36588557 New York City, New York, United States Posted: Jul. 30, 2015 Weekly Hours: 40.00 **Job Summary** Read more
*Apple* Retail - Multiple Positions (US) - A...
Sales Specialist - Retail Customer Service and Sales Transform Apple Store visitors into loyal Apple customers. When customers enter the store, you're also the Read more
Merchant Operations Manager: *Apple* Pay -...
Changing the world is all in a day's work at Apple . If you love innovation, here's your chance to make a career of it. You'll work hard. But the job comes with more than Read more
*Apple* Pay QA Manager - Apple Inc. (United...
Changing the world is all in a day's work at Apple . If you love innovation, here's your chance to make a career of it. You'll work hard. But the job comes with more than Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.