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

Latest Forum Discussions

See All

Avatar Legends: Realms Collide pre-regis...
Despite the staying power that the series has, Avatar: The Last Airbender surprisingly fumbled in the mobile gaming sphere, with Generations shuttering about a mere year after launch. Now, Tilting Point is giving it a go, with the upcoming Avatar... | Read more »
Return to the glory days of tactical RPG...
Back on the old Sega Mega Drive, or Genesis depending on where you are, there was a little series of tactical role-playing games called Shining Force, and I adored them. It started a love for this grid-based genre that persisted through the years... | Read more »
Take on the grandest beasts of all as th...
It has been hyped for a while but now it is finally here, the new Dancing in the Tempest season has arrived in Monster Hunter Now. Kicking off a banner summer for the game, it is time to strap on your boots and face the greatest threat yet, as the... | Read more »
The indie hit Vault of the Void will lan...
In a market where a lot of AAA games are starting to feel like reboots, remakes, or the same thing we’ve seen ten times with a different name slapped on it, indie developers are a boon. Especially ones who build a successful game singlehandedly,... | Read more »
Stumble Guys tries to catch up to the hy...
Do you remember when the Fallout TV series launched on Amazon and everyone nearly lost their minds? Well, it appears that Scopely missed that particular craze, and only now are we going to get a Fallout crossover, and by now, I mean in version 0.... | Read more »
Bid farewell to Penacony as Honkai: Star...
Penacony has been a story of twists, exciting new characters, and strong allies, and soon Honkai: Star Rail will be finishing it with a bang. Version 2.3, fittingly titled Farewell Penacony, will be launching June 19th and will feature updates to... | Read more »
HoYoverse roll out their plans for Anime...
For those who are looking to book a getaway in July, you might give some thought to Los Angeles between the 4th and 7th, which just so happens to coincide with the Anime Expo 2024. Amongst all the storied attendees is HoYoverse, who will be... | Read more »
The first rule of Brok the InvestiGator...
Mobile gamers were recently able to get their hands on BROK the InvestiGator, a point-and-click following the adventures of the titular reptile, a detective who can solve crimes through wit or brawn. If you were one that chose the latter then... | Read more »
Diablo Immortal celebrates second annive...
It has been two years since Diablo Immortal launched and despite some very valid criticism of its business model, it has done pretty well for itself. The Tempest class also gives it a lot of grace. To celebrate this anniversary, the March of the... | Read more »
Pokemon GO pulls on its jersey for a foo...
There have been a lot of jokes about this, some by me, but Pokemon Go has genuinely done a lot of good by getting people out and about.Pokemon GO Fest 2024: Madrid is fast approaching, and Niantic has set up a new area in a bit to get people to... | Read more »

Price Scanner via MacPrices.net

Apple Watch Ultra Watch 2 on sale for $719, s...
Amazon is offering an $80 discount on every Apple Watch Ultra 2 model this week. Their price is now $719. Shipping is free. For the latest prices & deals, keep an eye on our Apple Watch Price... Read more
New sale at Amazon: 16-inch M3 Pro and M3 Max...
Amazon is offering instant discounts on 16″ M3 Pro and 16″ M3 Max MacBook Pros ranging up to $350 off MSRP. Shipping is free. These are the lowest prices currently available for new 16″ Apple MacBook... Read more
Get a 13-inch M2 MacBook Air today at Apple f...
Apple has 13″ M2 MacBook Airs available for only $849 today in their Certified Refurbished store. These are the cheapest M2-powered MacBooks for sale at Apple. Apple’s one-year warranty is included,... Read more
Clearance Mac Studio with M1 Max CPU availabl...
Apple has clearance M1 Max Mac Studios available in their Certified Refurbished store for $270 off original MSRP. Each Mac Studio comes with Apple’s one-year warranty, and shipping is free: – Mac... Read more
Apple has 24-inch M3 iMacs on sale for $200-$...
Apple has a full line of 24-inch M3 iMacs available in their Certified Refurbished store starting at $1099 and ranging up to $260 off original MSRP. Each iMac is in like-new condition and comes with... Read more
24-inch M1 iMacs are available at Apple start...
Apple has clearance M1 iMacs available in their Certified Refurbished store starting at $1049 and ranging up to $300 off original MSRP. Each iMac is in like-new condition and comes with Apple’s... Read more
Back to School savings: Take $50-$100 off new...
Apple will take $50-$100 off new 11″ and 13″ M2 iPad Airs for all teachers, students, and staff of any educational institution with a .edu email address as part of their Apple Education discount,... Read more
Could A Smarter Siri Infused With AI (‘Apple...
FEATURE – The iPhone is already smart, but it’s about to become more intelligent. AI — short for artificial intelligence — is widely expected to be the main topic of discussion at this year’s WWDC (... Read more
Update: For WWDC, Amazon has lowered prices o...
Amazon has every configuration and color of Apple’s M3 MacBook Airs now on sale for $170-$210 off MSRP, starting at only $899 shipped, as Apple holds their annual WWDC conference this week. Their... Read more
Deal Alert! 2nd-generation Apple AirPods on s...
Amazon has 2nd generation Apple AirPods on sale right now for only $79.99 shipped. That’s $50 (38%) off Apple’s MSRP. Their price is the lowest currently available for a new set of AirPods from any... Read more

Jobs Board

Beauty Consultant - *Apple* Blossom Mall -...
Beauty Consultant - Apple Blossom Mall Location:Winchester, VA, United States (https://jobs.jcp.com/jobs/location/191170/winchester-va-united-states) - Apple Read more
Senior Software Engineer - *Apple* Fundamen...
…center of Microsoft's efforts to empower our users to do more. The Apple Fundamentals team focused on defining and improving the end-to-end developer experience in Read more
Sublease Associate Optometrist- *Apple* Val...
Sublease Associate Optometrist- Apple Valley, CA- Target Optical Date: Jun 17, 2024 Brand: Target Optical Location: Apple Valley, CA, US, 92307 **Requisition Read more
Rehabilitation Medicine Technician - *Apple*...
Rehabilitation Medicine Technician - Apple Hill (Outpatient Clinic) - Day/Evening Location: York Hospital, York, PA Schedule: Part Time Sign-On Bonus Eligible Read more
Operations Associate - *Apple* Blossom Mall...
Operations Associate - Apple Blossom Mall Location:Winchester, VA, United States (https://jobs.jcp.com/jobs/location/191170/winchester-va-united-states) - Apple Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.