TweetFollow Us on Twitter

Oct 89 Mousehole
Volume Number:5
Issue Number:10
Column Tag:Mousehole Report

Mousehole Report

By Rusty Hodge & Larry Nedry, Mousehole BBS

From: Willcox

Re: Deleting a Folder

I am having trouble deleting a folder using the Low Level File Manager routines. I have created a folder and put some temporary files in it. At the end of my program, I would like to delete this directory. I am trying to use PBHDelete. I first delete all the files in this folder. Then, I try to close the working directory with PBCloseWD since I opened it with PBOpenWD. Then I call PBHDelete. I get error -47, fBsyErr, File is busy. I have tried various parameters in PBHDelete (WDid, vRefnum, name of folder), but I still get -47. Also, when I do this with MultiFinder turned off, I can not delete the folder from the Finder, it too says the folder is busy. Help.

From: Adept

Re: Deleting a Folder

When doing any PBOpen calls, you have to be sure to set your ioWDProcID to ‘ERIK’, the magic ‘longint’, otherwise it will be undeletable by the finder (until reboot), You might be calling PBClose with something != PBOpen and != to ‘ERIK’..

From: Mikec

Re: Setting current folder

Bryce, I am excited to see your message #878 that creates new folders. I have been wanting to do this for an application for a long time. But I am just starting to program and have little idea how to fit your listed code into a procedure that will create the folder. Can you help me by listing a more complete procedure or uploading a text file? I use LSP and would be delighted to hear from you.

From: Tony

Re: Setting current folder

Mike, Below is the list of a function call CreateFolder. I believe this will do what you want. It takes as parameter the name of the folder and the volume reference of where to put the folder. In return, it will pass back and errorcode and the FolderID. The folderId is in fact the Directory Id and can be used a vRefNum (volume reference no) in any of your File I/O calls.

Function CreateFolder(FolderName:str255; vRefNum : integer;
varFolderId:longint):OSErr;
Var
 Blk:HParamBlockRec;
 errorcode :OSErr;
begin
   with blk do
    begin
     ioCompletion := nil;
     ioNamePtr := @FolderName;
     ioVrefNum := vRefNum;
     ioDirId := 0;
   end;
  errorcode := PBDirCreate(@blk,false);
 FolderID := blk.ioDirId;
 CreateFolder := errorcode;
end;

Hope this helps.

From: Shaper

Re: List Manager problem...

Does anyone have any source code for the List Manager routines? I got the source to the LDEF’s in the Think Pascal library on CompuServe and tried to use that source but it’s kind of strange because he used custom LDEFs with variable column numbers. I want to use the LDEF that comes in the system file to make a list of people’s names, and I can get the list to appear but the only way to scroll it is to click on someone’s name and then drag downward to scroll down - the arrow buttons don’t work for some reason. Also, it doesn’t always hilite the cell that you click on, so you have to keep clicking on different parts of the list cntl until one does hilite before you can scroll up or down...

From: Jumpcut

Re: List Manager problem...

If you don’t specify a LDEF, the List Manager will use the standard system LDEF. You can then set the list’s selFlags to make sure things get selected properly. CHeck around page 270 of IMIV. I was having similar problems after I changed the font and style of the window the list was in. First thing to check - make sure your window is a noGrowDocProc, or else the grow box (whether you draw one or not) will keep mouseDown events from scrolling the list down. I’m sure you’re using LClick, so I won’t bother to mention that. My only other suggestion is to avoid the obviously stupid (unlike me) and remember to change the font & face before creating the list.

From: Inbox

Re: Endless lists

I’m doing a numerical analysis of a chaos/pattern generation problem, but I’ve been temporarily delayed by the need of array-like structures with their original size unknown. Beginner C skills decrease my programming self-confidence, so I would like to hear you comments on the topic of lists... I did the following:

  typedef struct mystruct{
            int myint;
            mystructptr nextstruct;
            } *mystructptr;

But, I cannot do that because *mystructptr isn’t yet recognized by the compiler. Should I make nextstruct a ptr and then coerce it when creating a new structure? If not, what are your suggestions?

Thanks for listening, _inBox_

P.S. Is there any C trick for making self-referencing things like this one

(I mean a language directive of some kind...)

From: Siegel

Re: Endless lists

For a self-referential structure (say, a linked list): .

typedef struct element {
  int field1;
  long field2;
  struct element *next;
} element, *elementPtr;

Since this is the Mac, why not use a handle-based structure to support an array of dynamic size? As in:

typedef int *PInt, **HInt;
.
{
 Hint myIntHandle = NewHandle(0);
.
 /* sorry for the caps slipup above */
 SetHandleSize(myIntHandle, (long)nIntegers * sizeof(int));
 (*myIntHandle)[nIntegers - 1] = someValue; /* assign the last element 
*/
}

From: Inbox

Re: Endless lists

Thanks a lot. And just when I thought that I was out of the woods....

AAARGGGHHHH !!!!! The Mac’s random number generator turns out to be unusable by any self-respecting chaosologist for any purpose. I used statistical analysis to determine its bias, and then compared it to tables of acceptable fluctuations. And guess what, it SUCKS!!! (pardon the language)... So I set out to write a random number generator. Done. And, here comes the big one: how can I raise small integers to humongous powers??!! For example, 5^10000 will definitely cause an overflow for C’s “pow” function. The max number that can be stored in a 64 bit variable is 1.84467E19. But, 5^10000 or something similar just blew me out of the water.

Any suggestions are very very welcome. (and needed....).........

From: Apage

Re: Endless lists

If you’re using a Mac II the 881 uses the extended precision format to 80 bits. If you have a mac with an 882 (which can be dropped in with no trouble and few tools), the precision goes out to 96 bits.

From: Inbox

Re: Endless lists

Ah, but are you talking about the mantissa or the whole number? For example, my HP 28S (calculator) has a 12-digit mantissa and allows powers up to 500. With the 96 bit format the max is 28. Maybe the calculator scheme holds for the Mac?! Then only the mantissa is limited by the bits of a format. Take Matematica, for example... It can do number crunching with infinite precision and allows mega-powers. I guess it uses its own package but....

From: Tron

Re: Receiving events from a DA

Does anyone know how to receive events from a DA that is written in LSC? In IM #1, page 446, it says that the control routine receives in the csParam field a pointer to an event record. Hence:

     case 2:   /*  control  */
        switch (p->csCode) {
           case accEvent
               DoEvent((EventRecord *)p->csParam);
               break;
        }

I figured that this would work, yet I cannot handle any events in my DoEvent routine. Anyone ever dealt with DA’s from LSC before?

From: Macguru

Re: Receiving events from a DA

Have you set up your DA’s Event mask to tell it what events you are expecting to receive? This is done in the header.

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Model 15 (Music)
Model 15 1.0 Device: iOS iPhone Category: Music Price: $29.99, Version: 1.0 (iTunes) Description: The Moog Model 15 App is the first Moog modular synthesizer and synthesis educational tool created exclusively for iPad, iPhone and... | Read more »
How to deal with wind in Angry Birds Act...
Angry Birds Action! is a physics-based puzzler in which you're tasked with dragging and launching birds around an obstacle-littered field to achieve a set objective. It's simple enough at first, but when wind gets introduced things can get pretty... | Read more »
How to get three stars in every level of...
Angry Birds Action! is, essentially, a pinball-style take on the pull-and-fling action of the original games. When you first boot it up, you'll likely be wondering exactly what it is you have to do to get a good score. Well, never fear as 148Apps... | Read more »
The beginner's guide to Warbits
Warbits is a turn-based strategy that's clearly inspired by Nintendo's Advance Wars series. Since turn-based strategy games can be kind of tricky to dive into, see below for a few tips to help you in the beginning. Positioning is crucial [Read... | Read more »
How to upgrade your character in Spellsp...
So you’ve mastered the basics of Spellspire. By which I mean you’ve realised it’s all about spelling things in a spire. What next? Well you’re going to need to figure out how to toughen up your character. It’s all well and good being able to spell... | Read more »
5 slither.io mash-ups we'd love to...
If there's one thing that slither.io has proved, it's that the addictive gameplay of Agar.io can be transplanted onto basically anything and it will still be good fun. It wouldn't be surprising if we saw other developers jumping on the bandwagon,... | Read more »
How to navigate the terrain in Sky Charm...
Sky Charms is a whimsical match-'em up adventure that uses creative level design to really ramp up the difficulty. [Read more] | Read more »
Victorious Knight (Games)
Victorious Knight 1.3 Device: iOS Universal Category: Games Price: $1.99, Version: 1.3 (iTunes) Description: New challenges awaits you! Experience fresh RPG experience with a unique combat mechanic, packed with high quality 3D... | Read more »
Agent Gumball - Roguelike Spy Game (Gam...
Agent Gumball - Roguelike Spy Game 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: Someone’s been spying on Gumball. What the what?! Two can play at that game! GO UNDERCOVERSneak past enemy... | Read more »
Runaway Toad (Games)
Runaway Toad 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: It ain’t easy bein’ green! Tap, hold, and swipe to help Toad hop to safety in this gorgeous new action game from the creators of... | Read more »

Price Scanner via MacPrices.net

Indian Smartphone Market Grows Annually by 12...
India’s smartphone market grew by 12 percent year-over-year, with 24.4 million units shipping in Q1 2016. The top five vendors stayed the same, with Samsung in the lead, followed by Micromax, Intex... Read more
Get Notifications When Your Friend’s Phone Ba...
Calgary, Canada based Stonelight Pictures has announced the release of Battery Share 1.0.1, its new utility for iOS 9 supported devices. The company notes that people are spending more time on their... Read more
11-inch 1.6GHz/128GB MacBook Air on sale for...
Amazon has the current-generation 11″ 1.6GHz/128GB MacBook Air (sku MJVM2LL/A) on sale for $749.99 for a limited time. Their price is $150 off MSRP, and it’s the lowest price available for this model... Read more
Price drops on clearance 2015 13-inch MacBook...
B&H Photo has dropped prices on clearance 2015 13″ MacBook Airs by up to $250. Shipping is free, and B&H charges NY sales tax only: - 13″ 1.6GHz/4GB/128GB MacBook Air (MJVE2LL/A): $799, $200... Read more
Mac minis on sale for up to $100 off MSRP
B&H Photo has Mac minis on sale for up to $100 off MSRP including free shipping plus NY sales tax only: - 1.4GHz Mac mini: $449 $50 off MSRP - 2.6GHz Mac mini: $649 $50 off MSRP - 2.8GHz Mac mini... Read more
13-inch Retina MacBook Pros on sale for up to...
B&H Photo has 13″ Retina MacBook Pros on sale for $130-$200 off MSRP. Shipping is free, and B&H charges NY tax only: - 13″ 2.7GHz/128GB Retina MacBook Pro: $1169 $130 off MSRP - 13″ 2.7GHz/... Read more
Apple price trackers, updated continuously
Scan our Apple Price Trackers for the latest information on sales, bundles, and availability on systems from Apple’s authorized internet/catalog resellers. We update the trackers continuously: - 15″... Read more
SanDisk Half-Terabyte SSD Optimized for Every...
SanDisk Corporation has announced the SanDisk Z410 SSD, a cost-competitive, half-terabyte solid state drive (SSD) that enables manufacturers to design for a broad range of desktop PCs and laptops.... Read more
Churchill Downs Racetrack Selects VenueNext t...
Churchill Downs Racetrack has announced an agreement with VenueNext to implement its technology platform for the start of Churchill Downs 2016 Spring Meet, which includes the 142nd running of the... Read more
Record 700 Million Pounds of CE Recycled in 2...
The Consumer Technology Association (CTA) reports that a record-setting 700 million pounds of consumer electronics (CE) have been recycled under the eCycling Leadership Initiative (ELI). According to... Read more

Jobs Board

*Apple* Retail - Multiple Positions (US) - A...
Job Description:SalesSpecialist - Retail Customer Service and SalesTransform Apple Store visitors into loyal Apple customers. When customers enter the store, Read more
Restaurant Manager (Neighborhood Captain) - A...
…in every aspect of daily operation. WHY YOU'LL LIKE IT: You'll be the Big Apple . You'll solve problems. You'll get to show your ability to handle the stress and Read more
*Apple* Subject Matter Expert - NTT Data, In...
…in Owings Mills, MD has a 6+ month contract position available for an Apple Subject Matter Expert. TITLE: Apple Subject Matter Expert LOCATION: Owings Mills, 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
Restaurant Manager (Neighborhood Captain) - A...
…in every aspect of daily operation. WHY YOU'LL LIKE IT: You'll be the Big Apple . You'll solve problems. You'll get to show your ability to handle the stress and Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.