TweetFollow Us on Twitter

Jun 94 Top 10
Volume Number:10
Issue Number:6
Column Tag:Think Top 10

Think Top 10

By Scott Shurr, Symantec Technical Support, Symantec Corp.

This is a monthly column written by Symantec’s Technical Support Engineers intended to provide you with information on Symantec products. Each month we cover either a specific application of tools or a “Q&A” list.

Q. I changed a library in my project, and now I get link errors that say __noMethod and __noObject are undefined. Why?

A. These 2 functions are called from oopsDebug or oopsDebug++. The libraries call __noMethod when a message lookup fails, and __noObject when a message is sent to a bad object pointer or handle. These functions, declared in oops.h, allow your application to catch potentially fatal errors, and take the appropriate action. You must provide the code which defines the functions. For example:


/* 1 */
void __noMethod(void) { printf("Method lookup failed\n"); exit(1); }

Q. My project is using classes based on Pascal Objects. Are there any advantages to changing it to use pointer based objects?

A. Yes. Pointer based objects require less special treatment. Since they are not handles, they will never move, and you don’t need to worry about locking and unlocking them. Also, you will no longer need to keep track of when you are using a pointer, and when you are using a handle, so dereferencing becomes less of an issue. Another reason is that Pascal objects are not part of the C++ standard, which is a problem if you want to port your code to another platform.

Q. What are the advantages of moving the application I wrote with TCL 1.1.3 up to TCL 2.0?

A. First, TCL 2.0 uses pointer based objects instead of Pascal Objects. You can now use all of the nice features of C++ like multiple inheritance. Also, there are new classes that make it relatively easy to add features like scriptability to your application.

Q. I updated to C++ 7.0. Now I am getting warnings like the following (in this case while precompiling TCL #includes.cpp): File <Exceptions.h>; Line 71; While compiling <TCL #includes.cp> Warning: unrecognized pragma. What’s the problem?

A. The behavior of the 7.0 C++ translator in response to unknown pragmas has changed. In old versions, unrecognized pragmas were simply ignored. Now, they are flagged by warnings. The guilty pragma: #pragma nooptimize(CatchException) was unrecognized in C++ 6.0.x, but the compiler didn’t complain. It is safe to ignore the warning. You can disable the warnings, if you like, by going to Edit:Options:Symantec C++...:Warning Messages and unchecking the Unrecognized pragma box.

Q. I had to change some of my #pragma statements in order to fix link errors for my templates after I upgraded to C++ 7.0. For instance, the 6.0.x Vector Project gave me errors like this: undefined: operator <<(ostream&,vector<char>&) (main.cp) Why did this change?

A. Templates at 6.0.x could cause problems because the response to #pragma template TemplateName<type> was to instantiate every method in the TemplateName class. The expansion of large templates could result in code that would exceed the 32K segment size, and there was no way short of redesigning the project to get around it. In the 6.0.x Vector Project, for example, the statement: #pragma template vector<char> in the file vector<char>.cp caused the vector class for char, as well as the << operator and other methods, to be instantiated. In 7.0, you have to tell the compiler exactly where to instantiate the class and each of its methods. That’s why you need the line: #pragma template operator <<(ostream&, vector<char>&) to fix the link error. The increased control afforded by this change solves the segment size problem by allowing you to instantiate the class and its methods in different files in different segments. In general, the changes give the programmer more flexibility in generating the template instantiations.

Q. I have several projects that share the same resources. Is there any way to avoid having to edit the <ProjectName>.rsrc for each project whenever I want to change the resources?

A. Yes. The Resource Copier translator exists for that purpose. What it does is takes the contents of each .rsrc file in the project window and, when you bring the project up to date, updates the <ProjectName>.rsrc by copying any new or changed resources into that file. To share some resources between ProjectA and ProjectB, you could create a SharedResources.rsrc file, and add that file to each project. When you bring ProjectA up to date, the resources in SharedResources.rsrc will be copied into ProjectA.rsrc. ProjectB will work the same way. When you want to change the resources, run ResEdit on SharedResources.rsrc instead of ProjectA.rsrc or ProjectB.rsrc.

Q. Can I mix .rsrc and .r files in the same project?

A. Certainly. THINK Rez is just like the Resource Copier in its treatment of the <ProjectName>.rsrc file. The changes to any .r file in a project will be copied into the <ProjectName>.rsrc file when you bring the project up to date. It is okay to mix .r and .rsrc files in the same project, as long as the resource types and numbers are unique.

Q. Are there any online sources for patches?

A. Yes. Here is the list:

AppleLink: To find patches, follow the path: Support:Third Parties:Third Parties (P-Z):Symantec Solutions:Software Updates and Solutions:Think C/Symantec C++ Updates

CompuServe: To find patches: GO SYMDEVTOOLS, and BROWSE through library 2 for C patches, library 11 for C++ patches.

Symantec BBS: Call 503-484-6669 @9600 or 503-484-6699 @2400.

America Online: To find patches: keyword ‘Symantec’, click on Software Library

Internet (FTP): anonymous ftp to sumex-aim.stanford.edu. The path to patches is info-mac/lang

Q. I can’t get the TPM to automatically start up THINK Reference, even though I put “THINK Reference alias” into the Tools folder. Why doesn’t this work?

A. Items in the Tools folder should be the exact name of the program you wish to use. You must edit “THINK Reference alias” to be “THINK Reference”. To use another program like ToolServer, put in “ToolServer”, not “ToolServer alias.”

Q. The sizeof operator doesn’t work. The following statement prints 0: printf("%d\n",sizeof(int));

A. The problem is that sizeof returns a long, not an int. This works: printf("%ld\n",sizeof(int));

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Dr. Panda Racers (Education)
Dr. Panda Racers 1.0 Device: iOS Universal Category: Education Price: $2.99, Version: 1.0 (iTunes) Description: STEP ON THE GAS, RACE AND WIN!Fasten your seat belts and get ready to race! Speed your way to the finish line while doing... | Read more »
ROMANCING SAGA 2 (Games)
ROMANCING SAGA 2 1.0.0 Device: iOS Universal Category: Games Price: $17.99, Version: 1.0.0 (iTunes) Description: Romancing SaGa 2, originally released only in Japan in 1993, has been completely remastered and now receives its first... | Read more »
WRIO Keyboard (Utilities)
WRIO Keyboard 1.0 Device: iOS iPhone Category: Utilities Price: $2.99, Version: 1.0 (iTunes) Description: 40% OFF DURING LIMITED INTRODUCTORY OFFER | Read more »
Hatoful Boyfriend (Games)
Hatoful Boyfriend 1.0 Device: iOS Universal Category: Games Price: $4.99, Version: 1.0 (iTunes) Description: The hit PC game that everybirdie loves has now migrated to your mobile device! Now you are free to explore the wonders of St... | Read more »
Warp Shift (Games)
Warp Shift 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: [ CHECK YOUR HARDWARE: Warp Shift does NOT run on iPhone 4, iPad 1 and iPod touch 4G or older devices! It requires at least iOS8... | Read more »
Lifeline: Whiteout (Games)
Lifeline: Whiteout 1.0.2 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0.2 (iTunes) Description: Alone in a frozen wasteland with no memory of how he got there, a lost adventurer’s only hope is his last line of... | Read more »
Castles of Mad King Ludwig (Games)
Castles of Mad King Ludwig 1.0.1 Device: iOS Universal Category: Games Price: $6.99, Version: 1.0.1 (iTunes) Description: | Read more »
How to command and conquer in Raid HQ
Raid HQ is a satisfyingly deep base building game with over-the-top macho action and explosions. This little free to play bundle gives you a lot to do from managing a squad to building the most powerful base you possibly can. [Read more] | Read more »
How to build a successful civilisation i...
GodFinger 2 grants you godlike powers, leaving you to raise a civilization of followers. In the spirit of games like Black & White, the GodFinger games will see you building bigger and better villages, developing more advanced technology and... | Read more »
How to get all the crabs in Mr Crab 2
Mr. Crab 2 may look like a cutesy platformer for kids, but if you're the kind of person who likes to complete a game 100%, you'll soon realise that it's a tougher than a crustacean's shell. [Read more] | Read more »

Price Scanner via MacPrices.net

Kanex Introduces GoPower USB-C Rechargeable B...
Kanex has announced its GoPower USB-C portable battery for the USB-C MacBook, featuring the new industry standard connector and cable used for connectivity and power. Providing users with a new... Read more
Convertible and Detachable Devices Winning Ov...
According to the latest figures published by International Data Corporation (IDC), Western European shipments of ultraslim convertibles and detachables posted positive growth (44.7%) to account for... Read more
New MacBook Pros And Will MacBook Air Be Upgr...
With my mid-2013 13-inch MacBook Air closing on its third anniversary come November, I’m in system upgrade mode. Actually the Haswell CPU equipped Air is still doing a fine job, but my good wife is... Read more
Apple’s Education discount saves up to $300 o...
Purchase a new Mac or iPad using Apple’s Education Store and take up to $300 off MSRP. All teachers, students, and staff of any educational institution qualify for the discount. Shipping is free, and... Read more
13-inch 2.5GHz MacBook Pro on sale for $999,...
B&H Photo has the 13″ 2.5GHz MacBook Pro on sale for $999 including free shipping plus NY sales tax only. Their price is $100 off MSRP. Read more
Apple refurbished iMacs available for up to $...
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
Textkraft Professional Becomes A Mobile Produ...
The new update 4.1 of Textkraft Professional for the iPad comes with many new and updated features that will be particularly of interest to self-publishers of e-books. Highlights include import and... Read more
SnipNotes 2.0 – Intelligent note-taking for i...
Indie software developer Felix Lisczyk has announced the release and immediate availability of SnipNotes 2.0, the next major version of his productivity app for iOS devices and Apple Watch.... Read more
Pitch Clock – The Entrepreneur’s Wingman Laun...
Grand Rapids, Michigan based Skunk Tank has announced the release and immediate availability of Pitch Clock – The Entrepreneur’s Wingman 1.1, the company’s new business app available exclusively on... Read more
13-inch 2.9GHz Retina MacBook Pro on sale for...
B&H Photo has the 13″ 2.9GHz Retina MacBook Pro (model #MF841LL/A) on sale for $1599 including free shipping plus NY tax only. Their price is $200 off MSRP. Amazon also has the 13″ 3.9GHz Retina... Read more

Jobs Board

Editor, *Apple* News - APPLE (United States...
Job Summary The Apple News team is looking for a passionate and knowledgeable editor with experience covering entertainment/pop culture and experience running social Read more
*Apple* Nissan Service Technicians - Apple A...
Apple Automotive is one of the fastest growing dealer...and it shows. Consider making the switch to the Apple Automotive Group today! At Apple Automotive , Read more
ISCS *Apple* ID Site Support Engineer - APP...
…position, we are looking for an individual who has experience supporting customers with Apple ID issues and enjoys this area of support. This person should be Read more
Automotive Sales Consultant - Apple Ford Linc...
…you. The best candidates are smart, technologically savvy and are customer focused. Apple Ford Lincoln Apple Valley is different, because: $30,000 annual salary Read more
*Apple* Support Technician II - Worldventure...
…global, fast growing member based travel company, is currently sourcing for an Apple Support Technician II to be based in our Plano headquarters. WorldVentures is Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.