TweetFollow Us on Twitter

Nov 95 Top 10
Volume Number:11
Issue Number:11
Column Tag:Symantec Top 10

Symantec Top 10

This monthly column, written by Symantec’s Technical Support Engineers, aims _to provide you with technical information based on the use of Symantec products.

By Levi Brown, Symantec Corp.

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

Q: I set my project’s preferred and minimum memory partition sizes in the “Project Type” window, but when I build my application, the preferred and minimum memory partition sizes are always set to a different value. What is wrong?

A: The project’s resource file contains a SIZE resource that always overrides the value set under the Project, Options..., “Project Type” window. To solve this problem, open the ProjectName.rsrc resource file with ResEdit and delete the SIZE resource.

Q: I have heard of this program called Discipline that works with MacsBug to provide a higher level of error checking. What does it do, and does it work with the Symantec Debugger?

A: Discipline is a system extension that works with MacsBug to check the arguments passed to Toolbox routines. Discipline is built into MacsBug 6.5d12. To access it, you use the dcmd dizy.

Our debugger has not been tested thoroughly with Discipline. Therefore, it is possible that you may run into some incompatibilities. Discipline has a habit of revealing problems with many different programs including the Finder, which makes it difficult to use as a debugging tool.

Q: In UNIX there is a collection of routines, declared in curses.h that can be used to manipulate the cursor in a console-like display. In my Symantec C++ 8.0 project using the console window how can I achieve similar results?

A: Most of the functionality of the console window is declared in console.h. Here is an example of how to move the cursor to a specific point, and clear everything in the window from that point down.

#include <stdio.h>
#include <console.h> 

main()
{
 int i, ch, rows = 12, cols = 40;

 console_options.nrows = rows;
 console_options.ncols = cols;
 cshow( stdout );
 csetmode( C_NOECHO, stdout );
    // Set mode to C_NOECHO, so
    // getchar doesn’t move the
    // cursor.
 for( i=0; i<rows*cols; i++ )
 putchar( 'x' );
 cgotoxy( 5, 3, stdout );
 ch = getchar();
 ccleos( stdout );
}

Before the call to ccleos()

After the call to ccleos()

Q: I’m using the ToolBox call GetPicture() and I want to clean up the memory after I am done with the picture. How do I do that?

A: Pass the handle that GetPicture() returns to ReleaseResource(). Do not call DisposeHandle() on a handle to a resource or you may corrupt the resource map.

Q: When I try to use the QuickDraw global variables in my Symantec C++ 8.0 project I get undefined symbol errors. I’ve used the same globals many times before using 7.0 and it worked just fine. What is happening here?

A: With the introduction of Apple’s Universal Headers, access to the QuickDraw globals changed. Your 7.0 project was probably referring to the QuickDraw globals in the “old” style and using the original header files, not the Universal Headers. You will need to access the QuickDraw globals through the qd struct, defined in Quickdraw.h. i.e.:

CopyRgn(thePort->visRgn, thePort->clipRgn);

would become

CopyRgn(qd.thePort->visRgn, qd.thePort->clipRgn);

Q: I have a large 8.0 project with many files and I frequently use the Find... command under the Search menu. Every time I use it I have to set up the find parameters each time. Is there a way to set default search parameters?

A: Yes! In your Symantec C++ folder there is a folder called (Scripts), inside which you will find a compiled script called Startup:

tell application "Symantec Project Manager"
 -- Set the default search state.
 set user search state to ¬
 {wrap around:true, ¬
  ignore case:true, ¬
  files to search:only sources, ¬
  exclude system:true, ¬
  exclude precompiled header:true}
end tell

You can set the default parameters for the find in the indexed list shown above.

Q: I get link errors with a class that has static data members. Why is this?

A: If you declare a class with static data members you need to initialize those data members in the global data space outside the class, so that memory is allocated for them. If you do not initialize the static variables in global data space outside the class then the compiler does not have a location for the static data members in memory. Thus, you get a link error when you attempt to access that variable. Example:

class A
{
public:
 static short x;
 static char  y;

 char z;
};

short A::x = 0;  // Note: These variables are initialized
char  A::y = 'a';// outside the class declaration in
    // order to allocate memory for them.

Q: The following code used to work (up through 8.0), but in 8.0.1 it doesn’t. Why?

class A
{
 friend class B;
public:
 A();
 ~A();
 B *GetFriend(int index);
};

class B
{
public:
 B();
 ~B();
 int index;
};

I get an error on line 7 “semicolon expected”. If I put friend before B *GetFriend(int index), it works. Is it a compiler bug, or is it a new ANSI rule of some kind that I didn’t know about?

A: A couple things are happening here:

First, the code above compiled in previous versions due to a compiler bug. 8.0.1 corrects this error. Basically, the syntax is wrong. The class A has no idea what B is yet, and thus the compiler complains. If you put a forward declaration, class B;, in front of the declaration of A this will compile fine.

Second, the statement friend B *GetFriend(int index) tells the compiler that GetFriend is a friend function, and therefore has access to A’s protected and private members. The statement B *GetFriend(int index) tells the compiler that GetFriend is a member function of A. In both cases the friend class B does nothing more than allow all members of B access to A’s private and protected members.

Q: I have made a floating window view in Visual Architect, but when I go to attach it to a command, it does not appear in the list of views to open. How do I open it?

A: When you make a floating window view, VA derives a class from CFloatDirector; we will call it CMyFloatingWindow. You need to call OpenWind() to make the window appear (ShowWind() only undoes a HideWind()). The easiest way is to call it from within CMyFloatingWindow::MakeNewWindow(), right after the object is created; the window will appear immediately upon launch. To have it open from a command (i.e. menu or button), create the command by choosing Commands... from the Edit menu in VA. Enter the name for your command (e.g. cmdOpenMyFWindow), choose CApp from the In Class: popup menu and choose Call from the Do: popup menu.

Next, attach the command to the menu or button. If attaching to a menu: choose Menus... from the Edit menu, select the menu, click on Edit Menu Items, select the item and choose the command you created from the Command: popup menu. If attaching to a button: select the button in VA, get Pane Info from the Pane menu, open the CButton triangle and choose the command you created from the Command: popup menu.

Visual Architect will generate an empty function, DocmdOpenMyFWindow inside x_CApp.cp. Call OpenWind() from here.

Note: Calling from outside the CMyFloatingWindow requires that you have a pointer to the CMyFloatingWindow object. You can find this declared as a global in x_CApp.cp in the form:

 extern CAFloatingWindow  *gCAFloatingWindow; 

If you wish to make the call to OpenWind() from someplace other than x_CApp.cp, you must redeclare it (as above) and #include CMyFloatingWindow.h in the file where you want to use it.

Q: When I try to run the Symantec Debugger it quits with an error that says, “DebugServices cannot set trace bit.” How do I set the trace bit? I can’t find any options to set a trace bit in any of the project option debugging screens.

A: Most likely, you are running a Pre-System 7.5 operating system. You will need to put the items that are in the Pre-System 7.5 Additions folder into your system folder. The Pre-System 7.5 Additions folder is found in the Apple Software folder on your Symantec C++ 8.0 CD-ROM.

Bonus:

Q: I’m porting my code from 7.0.x to 8.0 and I get an “undefined symbol MBarHeight” when I try to compile. Why do I get a linker error?

A: With the introduction of Apple’s Universal Headers you can no longer access the variable MBarHeight directly. You will need to include LowMem.h and use LMGetMBarHeight(), and LMSetMBarHeight(), to access menu bar height. Access to other low memory variables has been changed in similar ways, so it’s a good idea to look in LowMem.h if you plan on using low memory variables.

Special Thanks To:

Glenn Austin, Mark Baldwin, Craig Conner, Rick Hartmann, Michael Hopkins, Steve Howard, Noah Lieberman, Andy McFarland, Chris Prinos, and Kevin Quah.

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

MacFamilyTree 8.2.5 - Create and explore...
MacFamilyTree gives genealogy a facelift: modern, interactive, convenient and fast. Explore your family tree and your family history in a way generations of chroniclers before you would have loved.... Read more
Hopper Disassembler 4.3.2- - Binary disa...
Hopper Disassembler is a binary disassembler, decompiler, and debugger for 32- and 64-bit executables. It will let you disassemble any binary you want, and provide you all the information about its... Read more
GraphicConverter 10.5.1 - $39.95
GraphicConverter is an all-purpose image-editing program that can import 200 different graphic-based formats, edit the image, and export it to any of 80 available file formats. The high-end editing... Read more
Delicious Library 3.7 - Import, browse a...
Delicious Library allows you to import, browse, and share all your books, movies, music, and video games with Delicious Library. Run your very own library from your home or office using our... Read more
Adobe Animate CC 2017 18.0.0.107 - Anima...
Animate CC 2018 is available as part of Adobe Creative Cloud for as little as $19.99/month (or $9.99/month if you're a previous Flash Professional customer). Animate CC 2018 (was Flash CC) lets you... Read more
Adobe After Effects CC 2018 15.0 - Creat...
After Effects CC 2018 is available as part of Adobe Creative Cloud for as little as $19.99/month (or $9.99/month if you're a previous After Effects customer). The new, more connected After Effects CC... Read more
Adobe Premiere Pro CC 2018 12.0.0 - Digi...
Premiere Pro CC 2018 is available as part of Adobe Creative Cloud for as little as $19.99/month (or $9.99/month if you're a previous Premiere Pro customer). Adobe Premiere Pro CC 2018 lets you edit... Read more
Alarm Clock Pro 10.3 - $19.95
Alarm Clock Pro isn't just an ordinary alarm clock. Use it to wake you up in the morning, send and compose e-mails, remind you of appointments, randomize the iTunes selection, control an internet... Read more
Adobe Lightroom 20170919-1412-ccb76bd] -...
Adobe Lightroom is available as part of Adobe Creative Cloud for as little as $9.99/month bundled with Photoshop CC as part of the photography package. Lightroom 6 is also available for purchase as a... Read more
Adobe Illustrator CC 2018 22.0.0 - Profe...
Illustrator CC 2018 is available as part of Adobe Creative Cloud for as little as $19.99/month (or $9.99/month if you're a previous Illustrator customer). Adobe Illustrator CC 2018 is the industry... Read more

Darts of Fury guide - how to rise in the...
Darts of Fury is a new, immensely absorbing darts game from indie studio Yakuto. It's darts in its purest form, but collectible darts and other upgrades give this game an addictive edge that's hard to shake. As your progress out of the beginner... | Read more »
ICEY (Games)
ICEY 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: ICEY is a 2D side-scrolling action game. As you follow the narrator's omnipresent voice, you will see through ICEY's eyes and learn the... | Read more »
The best new games we played this week -...
We've made it, folks. Another weekend is upon us. It's time to sit back and relax with the best new releases of the week. Puzzles, strategy RPGs, and arcade games abound this week. There's a lot of quality stuff to unpack this week, so let's hop... | Read more »
Wheels of Aurelia (Games)
Wheels of Aurelia 1.0.1 Device: iOS Universal Category: Games Price: $3.99, Version: 1.0.1 (iTunes) Description: | Read more »
Halcyon 6: Starbase Commander guide - ti...
Halcyon 6 is a well-loved indie RPG with stellar tactical combat and some pretty good writing, too. It's now landed on the App Store, so mobile fans, if you're itching for a good intergalactic adventure, here's your game. Being a strategy RPG, the... | Read more »
Game of Thrones: Conquest guide - how to...
Fans of base building games might be excited to know that yet another entry in the genre has materialized - Game of Thrones: Conquest. Yes, you can now join the many kingdoms of the famed book series, or create your own, as you try to conquer... | Read more »
Halcyon 6: Starbase Commander (Games)
Halcyon 6: Starbase Commander 1.4.2.0 Device: iOS Universal Category: Games Price: $6.99, Version: 1.4.2.0 (iTunes) Description: An epic space strategy RPG with base building, deep tactical combat, crew management, alien diplomacy,... | Read more »
Legacy of Discord celebrates its 1 year...
It’s been a thrilling first year for fans of Legacy of Discord, the stunning PvP dungeon-crawling ARPG from YOOZOO Games, and now it’s time to celebrate the game’s first anniversary. The developers are amping up the festivities with some exciting... | Read more »
3 reasons to play Thunder Armada - the n...
The bygone days of the Battleship board game might have past, but naval combat simulators still find an audience on mobile. Thunder Armada is Chinese developer Chyogames latest entry into the genre, drawing inspiration from the explosive exchanges... | Read more »
Experience a full 3D fantasy MMORPG, as...
Those hoping to sink their teeth into a meaty hack and slash RPG that encourages you to fight with others might want to check out EZFun’s new Eternity Guardians. Available to download for iOS and Android, Eternity Guardians is an MMORPG that lets... | Read more »

Price Scanner via MacPrices.net

Save $100 on 13″ MacBook Airs, prices start a...
Adorama has 2017 13″ MacBook Airs on sale today for $100 off MSRP including free shipping. Adorama charges NY & NJ sales tax only: – 13″ 1.8GHz/128GB MacBook Air (MQD32LL/A): $899, $100 off MSRP... Read more
1.4GHz Mac mini available for $399, $100 off...
TigerDirect has the 1.4GHz Mac mini on sale today for $399 including free shipping. Their price is $100 off MSRP, and it’s the lowest price available for this model. Although currently out of stock,... Read more
21″ 2.3GHz iMac on sale for $999, save $100
MacMall has the 21″ 2.3GHz iMac (MMQA2LL/A) on sale today for $999 including free shipping. Their price is $100 off MSRP, and it’s the lowest price available for this model. Read more
12″ iPad Pros on sale for $50 off MSRP, no ta...
Adorama has 12″ iPad Pros on sale today for $50 off MSRP. Shipping is free, and Adorama charges sales tax in NY & NJ only: – 12″ 64GB iPad Pro: $749, save $50 – 12″ 256GB iPad Pro: $899, save $50... Read more
9″ iPads on sale for $30 off, starting at $29...
MacMall has 9″ iPads on sale for $30 off including free shipping: – 9″ 32GB iPad: $299 – 9″ 128GB iPad: $399 Read more
Apple restocks full line of refurbished 13″ M...
Apple has restocked a full line of Apple Certified Refurbished 2017 13″ MacBook Pros for $200-$300 off MSRP. A standard Apple one-year warranty is included with each MacBook, and shipping is free.... Read more
13″ 3.1GHz/256GB MacBook Pro on sale for $167...
Amazon has the 2017 13″ 3.1GHz/256GB Space Gray MacBook Pro on sale today for $121 off MSRP including free shipping: – 13″ 3.1GHz/256GB Space Gray MacBook Pro (MPXV2LL/A): $1678 $121 off MSRP Keep an... Read more
13″ MacBook Pros on sale for up to $120 off M...
B&H Photo has 2017 13″ MacBook Pros in stock today and on sale for up to $120 off MSRP, each including free shipping plus NY & NJ sales tax only: – 13-inch 2.3GHz/128GB Space Gray MacBook... Read more
15″ MacBook Pros on sale for up to $200 off M...
B&H Photo has 15″ MacBook Pros on sale for up to $200 off MSRP. Shipping is free, and B&H charges sales tax in NY & NJ only: – 15″ 2.8GHz MacBook Pro Space Gray (MPTR2LL/A): $2249, $150... Read more
Roundup of Apple Certified Refurbished iMacs,...
Apple has a full line of Certified Refurbished 2017 21″ and 27″ iMacs available starting at $1019 and ranging up to $350 off original MSRP. Apple’s one-year warranty is standard, and shipping is free... Read more

Jobs Board

Project Engineer, *Apple* Education Profess...
Project Engineer, Apple Education Professional Services Job Number: 113143353New York City, New York, United StatesPosted: Oct. 17, 2017Weekly Hours: 40.00 Job Read more
Commerce Software Engineer, *Apple* Media P...
Commerce Software Engineer, Apple Media Products Job Number: 113092072New York City, New York, United StatesPosted: Oct. 19, 2017Weekly Hours: 40.00 Job Summary With Read more
Engineering Manager, *Apple* Retail Enginee...
# Engineering Manager, Apple Retail Engineering Job Number: 58139948 Santa Clara Valley, California, United States Posted: 20-Oct-2017 Weekly Hours: 40.00 **Job 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
Commerce Engineer, *Apple* Media Products -...
Commerce Engineer, Apple Media Products (New York City) Job Number: 113028813New York City, New York, United StatesPosted: Sep. 20, 2017Weekly Hours: 40.00 Job Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.