TweetFollow Us on Twitter

Feb 96 Factory Floor
Volume Number:12
Issue Number:2
Column Tag:From The Factory Floor

From the Factory Floor

A monthly column of assorted news, interviews, and technical information from Metrowerks.

By Dave Mark

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

In last month’s issue, we introduced a brand new column with little in the way of explanation. Here’s the skinny. At Neil’s persistent urging, the folks at Metrowerks asked me to put together a regular monthly column, but with no particular agenda. For example, last month’s column was a Java interview with Greg Galanos, Metrowerks’ President and CEO. This month, we’ll go through a pile of Metrowerks tech support questions and answers. Got any ideas? Any interviews you’d like to see? As always, your feedback is most welcome. Check out page 2 of the magazine for contact information.

The questions were provided by Stephen Chong, Khurram Quereshi, and the folks at Metrowerks tech support. I did a little bit of editing just to clean up the questions but I tried to keep with the spirit of the original question. Since not everyone wants their name up in lights, I didn’t include names with the questions.

Top Ten Tech Support Questions

Q: My program makes extensive use of SIOUX for console i/o, and I frequently generate more than 32K worth of output in the console window. I’ve noticed that when I scroll down to the bottom of my console window, I occasionally end up with garbage in the window and sometimes the window stops scrolling. Any ideas?

A: Our SIOUX output window can only handle 32k of output at a time, and after you send it more than that, results are unpredictable. The solution is to either redirect stdout to a file (via the ccommand() function/dialog in console.h) or change the printfs to fprintfs and write to a file.

Q: How can I use the debugger for debugging MPW tools and how can I specify command-line arguments when I am debugging?

A: Currently, our debugger doesn’t support debugging MPW tools. One option is to build your tool as an application that uses the ccommand() function to take its command-line arguments and I/O redirection. Once it is debugged, you would change the project type back to MPW tool, swap ANSI libraries, and remove the ccommand call. Another option is to purchase Steve Jasik’s The Debugger, which can debug 68K MPW tools, and possibly PPC ones.

Q: In the following code snippet, the scope of the variable i inside the for-loop doesn’t conform to the ARM when I compile using the CodeWarrior C++ compiler. Why is that?

 void scopeOfVars()
 {
 long a = 0;
 if (a)
 for (long i = 0; i < 12; ++i)
 a = i;
 else
 for (long i = 0; i < 12; ++i)
 a = i + 1;
 }

A: The scope of the index is just within the for-loop; this agrees with the draft ANSI Standard for C++ which is what CodeWarrior follows. If you instead want to force ARM conformance, which allows the index to live outside the for-loop, you can do this by checking the ARM Conformance checkbox in the C/C++ Language Preferences panel.

Q: I have two source code files I am linking together. One is written in C and one in Pascal. Here’s the Pascal source code, from source file Foo.p:

 unit Foo;
 interface

 var
 myGlobalVariable : Integer;

 implementation

 end.

Here’s the C source code:

 extern short myGlobalVariable;

 void main(void)
 {
 myGlobalVariable++;
 }

When I compile and link these files using CodeWarrior I get a linker error complaining that myGlobalVariable referenced from main is undefined. What gives?

A: You will need to do either (but not both) of the following to make your code link:

• In the Pascal source, enclose the variable declaration with the compiler directive {$J+} and {$J-}. The $J directive controls the case conversion of global identifiers when building object files.

or

• Use all uppercase in the variable name in your C source code.

Q: I just upgraded to CW7 and I’m having problems getting a CW6 Pascal 68K project to link under CW7. When I recompile my code, I got the following linker errors:

 Link Error : StrOp.c 'memchr' referenced 
 from '__POSITION__' is undefined.
 Link Error : MWP.Stub.lib: '%_X2STR' referenced
 from 'NUM2STR' is undefined.
 Link Error : MWP.Stub.lib: 'STR2DEC' referenced
 from 'STR2NUM' is undefined.

A: Under CW7, the IDE is now integrated, allowing Pascal and C to use the same set of ANSI C libraries. You’ll need to make sure these libraries have been added to your project. To find out all the libraries needed for a typical 68k project in CW7, you might want to create a new project using the MacOS 68k Pascal.µ project stationery, then compare your new project to your old project.

Q: In CW6, I used the libraries P/ANS.68K.lib and SetLib.Lib (A5). What are the CW7 equivalents?

A: Neither of these libraries are needed under CW7.

Q: I have a simple ANSI C console-based program I wrote on the Mac and that I am trying to get working under Windows ’95. The program works just fine under MacOS but I can’t get it to build using the Win32/x86 environment. I am using the Win32s libraries as used in the CW7 Win32/x86 tutorial but I can’t get my project to link sucessfully.

A: Inside the (Project Stationery) folder is a folder called Additional Project Stationery. Drag the Win32 Console application stationery from there into the (Project Stationery) folder. Next, create a new project using the Win32 Console app stationery. The binary created from there should run without problems under Windows95. I just tried it with Hello World and it ran fine on my Win95 machine.

Q: Is there a way to “Import” the template I made in version 1 of Constructor into version 2 of Constructor?

A: Unfortunately, Constructor 1 and 2 are completely different programs (literally), and they use a different mechanism for custom types. Right now it isn’t possible to import 1.0.1 templates into 2.0.

Q: How can I get a SIOUX-based program to quit without pausing when the program ends or without waiting for the user to select Quit from the File menu?

A: Try this: #include the file <SIOUX.h>, then add the following code at the beginning of main():

 SIOUXSettings.autocloseonquit = true;
 SIOUXSettings.asktosaveonclose = false;

Q: I’m trying to debug a code resource. However, after I set a breakpoint at the beginning of the resource and then run the application that calls this resource, I never drop into the debugger. What’s happening?

A: Under CW7, you can debug only 68K code resources. Debugging PPC code resources will be available in CW8 (contact tech support to request a beta). If you are debugging a code resource under CW7, carefully follow the instructions in the Debugger manual on debugging code resources. Here is the basic procedure:

After creating the .SYM file for the code resource, change its name (to anything). Double-click on it, and then (since the name no longer corresponds to any executable), the debugger will ask you for the name of the executable to look at. Give it the name of the executable you’ve created that contains this resource. You can now set breakpoints. Next, leaving the .SYM window open, double-click on the application itself and control should be transferred to the Debugger. Let us know if this sequence of steps doesn’t work. (In that case it might be necessary for us to look at a copy of the project in order to diagnose the problem.)

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Skype 8.52.0.138 - Voice-over-internet p...
Skype allows you to talk to friends, family and co-workers across the Internet without the inconvenience of long distance telephone charges. Using peer-to-peer data transmission technology, Skype... Read more
Bookends 13.2.6 - 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
BusyContacts 1.4.0 - Fast, efficient con...
BusyContacts is a contact manager for OS X that makes creating, finding, and managing contacts faster and more efficient. It brings to contact management the same power, flexibility, and sharing... Read more
Chromium 77.0.3865.75 - Fast and stable...
Chromium is an open-source browser project that aims to build a safer, faster, and more stable way for all Internet users to experience the web. Version 77.0.3865.75: A list of changes is available... Read more
DiskCatalogMaker 7.5.5 - Catalog your di...
DiskCatalogMaker is a simple disk management tool which catalogs disks. Simple, light-weight, and fast Finder-like intuitive look and feel Super-fast search algorithm Can compress catalog data for... Read more
Alfred 4.0.4 - Quick launcher for apps a...
Alfred is an award-winning productivity application for OS X. Alfred saves you time when you search for files online or on your Mac. Be more productive with hotkeys, keywords, and file actions at... Read more
A Better Finder Rename 10.45 - File, pho...
A Better Finder Rename is the most complete renaming solution available on the market today. That's why, since 1996, tens of thousands of hobbyists, professionals and businesses depend on A Better... Read more
iFinance 4.5.11 - Comprehensively manage...
iFinance allows you to keep track of your income and spending -- from your lunchbreak coffee to your new car -- in the most convenient and fastest way. Clearly arranged transaction lists of all your... Read more
OmniGraffle Pro 7.11.3 - Create diagrams...
OmniGraffle Pro helps you draw beautiful diagrams, family trees, flow charts, org charts, layouts, and (mathematically speaking) any other directed or non-directed graphs. We've had people use... Read more
BBEdit 12.6.7 - Powerful text and HTML e...
BBEdit is the leading professional HTML and text editor for the Mac. Specifically crafted in response to the needs of Web authors and software developers, this award-winning product provides a... Read more

Latest Forum Discussions

See All

Five Nights at Freddy's AR: Special...
Five Nights at Freddy's AR: Special Delivery is a terrifying new nightmare from developer Illumix. Last week, FNAF fans were sent into a frenzy by a short teaser for what we now know to be Special Delivery. Those in the comments were quick to... | Read more »
Rush Rally 3's new live events are...
Last week, Rush Rally 3 got updated with live events, and it’s one of the best things to happen to racing games on mobile. Prior to this update, the game already had multiplayer, but live events are more convenient in the sense that it’s somewhat... | Read more »
Why your free-to-play racer sucks
It’s been this way for a while now, but playing Hot Wheels Infinite Loop really highlights a big issue with free-to-play mobile racing games: They suck. It doesn’t matter if you’re trying going for realism, cart racing, or arcade nonsense, they’re... | Read more »
Steam Link Spotlight - The Banner Saga 3
Steam Link Spotlight is a new feature where we take a look at PC games that play exceptionally well using the Steam Link app. Our last entry talked about Terry Cavanaugh’s incredible Dicey Dungeons. Read about how it’s a great mobile experience... | Read more »
PSA: GRIS has some issues
You may or may not have seen that Devolver Digital just released GRIS on the App Store, but we wanted to do a quick public service announcement to say that you might not want to hop on buying it just yet. The puzzle platformer has come to small... | Read more »
Explore the world around you in new matc...
Got a hankering for a fresh-feeling Match-3 puzzle game that offers a unique twist? You might find exactly what you’re looking for with What a Wonderful World, a new spin on the classic mobile genre which merges entertaining puzzles with global... | Read more »
Combo Quest (Games)
Combo Quest 1.0 Device: iOS Universal Category: Games Price: $.99, Version: 1.0 (iTunes) Description: Combo Quest is an epic, time tap role-playing adventure. In this unique masterpiece, you are a knight on a heroic quest to retrieve... | Read more »
Hero Emblems (Games)
Hero Emblems 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: ** 25% OFF for a limited time to celebrate the release ** ** Note for iPhone 6 user: If it doesn't run fullscreen on your device... | Read more »
Puzzle Blitz (Games)
Puzzle Blitz 1.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0 (iTunes) Description: Puzzle Blitz is a frantic puzzle solving race against the clock! Solve as many puzzles as you can, before time runs out! You have... | Read more »
Sky Patrol (Games)
Sky Patrol 1.0.1 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0.1 (iTunes) Description: 'Strategic Twist On The Classic Shooter Genre' - Indie Game Mag... | Read more »

Price Scanner via MacPrices.net

Save $150-$250 on 10.2″ WiFi + Cellular iPads...
Verizon is offering $150-$250 discounts on Apple’s new 10.2″ WiFi + Cellular iPad with service. Buy the iPad itself and save $150. Save $250 on the purchase of an iPad along with an iPhone. The fine... Read more
Apple continues to offer 13″ 2.3GHz Dual-Core...
Apple has Certified Refurbished 2017 13″ 2.3GHz Dual-Core non-Touch Bar MacBook Pros available starting at $1019. An standard Apple one-year warranty is included with each model, outer cases are new... Read more
Apple restocks 2018 MacBook Airs, Certified R...
Apple has restocked Certified Refurbished 2018 13″ MacBook Airs starting at only $849. Each MacBook features a new outer case, comes with a standard Apple one-year warranty, and is shipped free. The... Read more
Sunday Sale! 2019 27″ 5K 6-Core iMacs for $20...
B&H Photo has the new 2019 27″ 5K 6-Core iMacs on stock today and on sale for up to $250 off Apple’s MSRP. Overnight shipping is free to many locations in the US. These are the same iMacs sold by... Read more
Weekend Sale! 2019 13″ MacBook Airs for $200...
Amazon has new 2019 13″ MacBook Airs on sale for $200 off Apple’s MSRP, with prices starting at $899, each including free shipping. Be sure to select Amazon as the seller during checkout, rather than... Read more
2019 15″ MacBook Pros now on sale for $350-$4...
B&H Photo has Apple’s 2019 15″ 6-Core and 8-Core MacBook Pros on sale today for $350-$400 off MSRP, starting at $2049, with free overnight shipping available to many addresses in the US: – 2019... Read more
Buy one Apple Watch Series 5 at Verizon, get...
Buy one Apple Watch Series 5 at Verizon, and get a second Watch for 50% off. Plus save $10 on your first month of service. The fine print: “Buy Apple Watch, get another up to 50% off on us. Plus $10... Read more
Sprint offers 64GB iPhone 11 for free to new...
Sprint will include the 64GB iPhone 11 for free for new customers with an eligible trade-in in of the iPhone 7 or newer through September 19, 2019. The fine print: “iPhone 11 64GB $0/mo. iPhone 11... Read more
Verizon offers new iPhone 11 models for up to...
Verizon is offering Apple’s new iPhone 11 models for $500 off MSRP to new customers with an eligible trade-in (see list below). Discount is applied via monthly bill credits over 24 months. Verizon is... Read more
AT&T offers free $300 reward card + free...
AT&T Wireless will include a second free 64GB iPhone 11 with the purchase of one eligible iPhone at full price. They will also include a free $300 rewards card. The fine print: “Buy an elig.... Read more

Jobs Board

Student Employment (Blue *Apple* Cafe) Spri...
Student Employment (Blue Apple Cafe) Spring 2019 Penn State University Campus/Location: Penn State Brandywine Campus City: Media, PA Date Announced: 12/20/2018 Date Read more
Best Buy *Apple* Computing Master - Best Bu...
**732359BR** **Job Title:** Best Buy Apple Computing Master **Job Category:** Store Associates **Location Number:** 000171-Winchester Road-Store **Job Description:** Read more
*Apple* Mobile Master - Best Buy (United Sta...
**732324BR** **Job Title:** Apple Mobile Master **Job Category:** Store Associates **Location Number:** 000013-Fargo-Store **Job Description:** **What does a Best Read more
Best Buy *Apple* Computing Master - Best Bu...
**732455BR** **Job Title:** Best Buy Apple Computing Master **Job Category:** Sales **Location Number:** 000449-Auburn Hills-Store **Job Description:** **What does a Read more
*Apple* Mobility Pro - Best Buy (United Stat...
**732490BR** **Job Title:** Apple Mobility Pro **Job Category:** Store Associates **Location Number:** 000449-Auburn Hills-Store **Job Description:** At Best Buy, Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.