Tricks of the Mac Game Programming Gurus/TricksOfTheMacGameProgrammingGurus.iso/Information/CSMP Digest/volume 1/csmp-v1-104.txt

Text File | 1994-12-08 | 42.5 KB | 1,176 lines | [TEXT/R*ch]

C.S.M.P. Digest             Fri, 05 Jun 92       Volume 1 : Issue 104

Today's Topics:

    MacApp: documentation on ViewEdit
    Is it possible to turn the monitor off & on from software?
    (Urgent) Redirection with THINK Pascal
    File Manager Blues
    CTB Examples in C?
    PD online references ?
    IIfx ROM not 32 bit clean
    Learn c on the mac
    Hack to autocomment in Think C 5.0???
    Q: Flip-wipe from one PICT to another
    Repost: How to get Superdrive into MFM mode?
    How can we "emulate" the Finder...?


The Comp.Sys.Mac.Programmer Digest is moderated by Michael A. Kelly.

These digests are available (by using FTP, account anonymous, your email
address as password) in the pub/mac/csmp-digest directory on ftp.cs.uoregon.
edu.  This is also the home of the comp.sys.mac.programmer Frequently Asked
Questions list.  The last several issues of the digest are available from
sumex-aim.stanford.edu as well.

These digests are also available via email.  Just send a note saying that you
want to be on the digest mailing list to [e-mail], and you will
automatically receive each new digest as it is created.

The digest is a collection of articles from the internet newsgroup comp.sys.
mac.programmer.  It is designed for people who read c.s.m.p. semi-regularly
and want an archive of the discussions.  If you don't know what a newsgroup
is, you probably don't have access to it.  Ask your systems administrator(s)
for details.  (This means you can't post questions to the digest.)

The articles in these digests are taken directly from comp.sys.mac.programmer.
They are not edited; all articles included in this digest are in their original
posted form.  The only articles that are -not- included in these digests are
those which didn't receive any replies (except those that give information
rather than ask a question).  All replies to each article are concatenated
onto the original article in the order in which they were received.  Article
threads are not added to the digests until the last article added to the
thread is at least one month old (this is to ensure that the thread is dead
before adding it to the digests).

Send administrative mail to [e-mail].

-------------------------------------------------------

From: [e-mail] (Peter Speck)
Subject: MacApp: documentation on ViewEdit
Date: 22 Apr 92 17:57:08 GMT
Organization: Roskilde UniversitetsCenter

I cannot find any documentation on how
to edit custion views in ViewEdit
(for MacApp3.0).
a) Eg. I have a class TSpecialEditText that
doesn't have anything i the 'View' rsrc besides
from the TEditText stuff
b) I have addition stuff, want to specify it
like TMPL in ResEdit or XCMDs.

Thanks,
Peter Speck

+++++++++++++++++++++++++++

From: [e-mail] (Mark Lanett)
Organization: University of Illinois at Urbana
Date: Wed, 22 Apr 1992 20:16:47 GMT

[e-mail] (Peter Speck) writes:

>I cannot find any documentation on how
>to edit custion views in ViewEdit
>(for MacApp3.0).
>a) Eg. I have a class TSpecialEditText that
>doesn't have anything i the 'View' rsrc besides
>from the TEditText stuff

>b) I have addition stuff, want to specify it
>like TMPL in ResEdit or XCMDs.

Well, all subclasses will have extra fields. The question is, do you want to
read them in from the view resource (like the standard views do), or read them
in and call explicit init routines in your code?

For "a", just do the usual trick of replacing the class name in ViewEdit with
your subclasses name.

For "b"... ViewEdit 1.0 doesn't support writing out additional information. You
can use Rez to write views, but it would mean diving into the rather kludgy way
MacApp handles views (since Rez doesn't support subclassing), and Text-based
views are pretty hard to rearrange. For MacApp 3.0/ViewEdit 3.0, you are given
a single 4 byte space at the end of every view. At the moment I believe it's
interpreted as a long, so you can stick a resource id in there or something.
It's referenced as fUserBytes.
- --
Mark Lanett, Software Tools Group, NCSA; [e-mail]; NCSA.STG (AppleLink)

+++++++++++++++++++++++++++

From: [e-mail]
Organization: Actrix Information Exchange
Date: Sun, 26 Apr 1992 04:56:28 GMT

In article <mlanett.703973807@void> [e-mail] (Mark Lanett) writes:
>
> For "b"... ViewEdit 1.0 doesn't support writing out additional information. You
> can use Rez to write views, but it would mean diving into the rather kludgy way
> MacApp handles views (since Rez doesn't support subclassing), and Text-based
> views are pretty hard to rearrange. For MacApp 3.0/ViewEdit 3.0, you are given
> a single 4 byte space at the end of every view. At the moment I believe it's
> interpreted as a long, so you can stick a resource id in there or something.
> It's referenced as fUserBytes.

ViewEdit is just *crying* out to get user-defined view types via the
new "Dinker" facility.  It would probably take less than a day to do
it and if Apple don't have someone working on it they darned well should,
IMNSHO.
- --
[e-mail]   Twisted pair: [phone]
BIX: brucehoult                 Last Resort:  PO Box 4145 Wellington, NZ
"Cray's producing a 200 MIPS personal computer with 64MB RAM and a 1 GB
hard disk that fits in your pocket!"   "Great!  Is it PC compatable?"

+++++++++++++++++++++++++++

From: [e-mail] (Kent Sandvik)
Date: 4 May 92 23:24:52 GMT
Organization: MacDTS Mongols

In article <[e-mail]>, [e-mail]
writes:
>
> In article <mlanett.703973807@void> [e-mail] (Mark Lanett)
writes:
> >
> > For "b"... ViewEdit 1.0 doesn't support writing out additional information.
You
> > can use Rez to write views, but it would mean diving into the rather kludgy
way
> > MacApp handles views (since Rez doesn't support subclassing), and Text-based
> > views are pretty hard to rearrange. For MacApp 3.0/ViewEdit 3.0, you are
given
> > a single 4 byte space at the end of every view. At the moment I believe it's
> > interpreted as a long, so you can stick a resource id in there or something.
> > It's referenced as fUserBytes.
>
> ViewEdit is just *crying* out to get user-defined view types via the
> new "Dinker" facility.  It would probably take less than a day to do
> it and if Apple don't have someone working on it they darned well should,
> IMNSHO.

About ViewEdit, Dinker and so on, the World Wide Developer's Conference
will have a couple of announcements about this all. Sorry, can't say anything
until it's officially sanctioned.

Cheers,
Kent Sandvik
certainly not speaking for Apple just now!


---------------------------

From: [e-mail] (Michael A. Kelly)
Subject: Is it possible to turn the monitor off & on from software?
Organization: University of Oregon Computer and Information Sciences Dept.
Date: Thu, 23 Apr 1992 20:08:52 GMT


The subject line says it all.  What do you think?

Mike.
- --
_____________________________________________________________________________
Michael A. Kelly                                         University of Oregon
[e-mail]                             Computer Science Department
_____________________________________________________________________________

+++++++++++++++++++++++++++

From: [e-mail] (Steve Christensen)
Date: 5 May 92 01:32:59 GMT
Organization: Apple Computer Inc., Cupertino, CA

[e-mail] (Michael A. Kelly) writes:

>The subject line says it all.  What do you think?

Well, actually it may not.  Do you mean, "can you turn the monitor power
on/off?" or "can you add/remove the part of the desktop associated with
a particular monitor?"?  Two vastly different things.  For the first case,
the answer is generally 'no' because most (all?) monitors have a physical
power switch that can't be controlled by software.

For the second case, the answer is 'yes'...although you have great potential
to make lots and lots of apps crash, especially in the case of removing part
of the desktop.  Adding monitors to the desktop dynamically takes a bit of
work to do correctly, but I don't know what apps won't work correctly when
that happens...

steve

- --
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  Steve Christensen            Never hit a man with glasses.
  [e-mail]            Hit him with a baseball bat.

---------------------------

From: [e-mail] (007)
Subject: (Urgent) Redirection with THINK Pascal
Date: 2 May 92 21:35:29 GMT
Organization: Universal Exports


  Is there any way to redirect a text file as standard input similar to Unix's
ProgName < TestData type redirection? Also how can I give the text window an
EOF?

I am using THINK Pascal 3.0.2

Thanks in advance.

                -Noah

+++++++++++++++++++++++++++

From: [e-mail] (Ed Watkeys)
Date: Sat, 2 May 92 23:26:56 EDT
Organization: Distant Software


In article <[e-mail]> (comp.sys.mac.programmer), [e-mail] (007) writes:
>
>   Is there any way to redirect a text file as standard input similar to Unix's
> ProgName < TestData type redirection? Also how can I give the text window an
> EOF?
>
> I am using THINK Pascal 3.0.2
>
> Thanks in advance.
>
>                 -Noah
>
Go to the "Run Options..." or similar in the Run menu -- it allows you
to send standard output to a file or the printer.

Your other problem was solved by running this program and experimenting...

program eoftest
var s : string;
begin
  readln (s);
  readln (s);
end.

I ran it and hit common eof characters (^D, ^Z, ^C). ^C causes an "unexpected
eof" error to occur -- it stops the first readln, as eof should, and bombs
the second.

Ed

- --
Ed Watkeys (Drexel U. Comp Sci)  "Moral judgement and condemnation is
[e-mail]              the favorite form of revenge for the
[e-mail]      spiritually limited on those who are
ls.com!phlpa!caligula!edw         less so...." -- Friedrich Nietzsche

+++++++++++++++++++++++++++

From: [e-mail] (Phil Shapiro)
Date: 3 May 92 23:16:21 GMT
Organization: Symantec Corp.

>>>>> On Sat, 2 May 92 23:26:56 EDT, [e-mail] (Ed Watkeys) said:

 > I ran it and hit common eof characters (^D, ^Z, ^C). ^C causes an
 > "unexpected eof" error to occur -- it stops the first readln, as
 > eof should, and bombs the second.

Try using the Enter key on the keypad, this signals an EOF in the
correct fashion. I believe that the reason for this is that the
charCode for the Enter key is 0x03, which is the same as Control-D and
which is used to signal an EOF on UNIX systems.

    -phil
- --
   Phil Shapiro                                   Software Engineer
   Language Products Group                     Symantec Corporation
           Internet: [e-mail]

+++++++++++++++++++++++++++

From: [e-mail] (Matthias Neeracher)
Organization: Integrated Systems Laboratory, ETH, Zurich
Date: Mon, 4 May 1992 10:04:07 GMT

In article <[e-mail]> [e-mail] (Phil Shapiro) writes:
>>>>>> On Sat, 2 May 92 23:26:56 EDT, [e-mail] (Ed Watkeys) said:
>
> > I ran it and hit common eof characters (^D, ^Z, ^C). ^C causes an
> > "unexpected eof" error to occur -- it stops the first readln, as
> > eof should, and bombs the second.
>
>Try using the Enter key on the keypad, this signals an EOF in the
>correct fashion.

Probably correct...

>I believe that the reason for this is that the
>charCode for the Enter key is 0x03, which is the same as Control-D and
>which is used to signal an EOF on UNIX systems.

... but this explanation is incorrect. Control-D is 0x04.

Matthias

- -----
Matthias Neeracher                                   [e-mail]
 "You must have picked up that copy of Scarlett instead of Inside Mac
  when you tried to find the right call..." -- Keith Rollin

---------------------------

From: [e-mail] (David Heddle)
Subject: File Manager Blues
Organization: CEBAF (Continuous Electron Beam Accelerator Facility)
Date: Sun, 3 May 1992 00:34:24 GMT

Dear Friends:

Apologies for what must be a set of FAQs. However, I am stuggling to understand
the file manager. Here are my questions:

1) What is the definition of a "working" directory? Is it equivalent to
what  "pwd" would
    give me in Unix or what "SHOW DEFAULT" would give me in VMS?

2) Assuming that the working directory is as implied by an affirmative
response to
    the previous question, what does it mean to "create"  (or is it
"open", I don't have
   IM IV at hand) a working directory? Is that equivalant to "cd" (unix)
or "SET DEFAULT"
  VMS? If so, what about the previous Working Directory?? Is there only
one at a time?

Questions 3-5 are practical in nature:

3) How do I get an ID for the present Working Directory? The things that
I have tried
    seem to give me only the ID of the root (i.e. the hard disk )

4) How do I get the names (partial path) of all the files and  folders
(but no their
    contents -- i.e. just the folder names) of the present working
directory?

5) How can I find the ID of the parent and the IDs of the offspring of the
    present working directory?


Any help is greatly appreciated! The real bottom line is that, while iI
have no doubt
that the fault is mine, I  cannot feel comfortable with the File Manager
chapter
in IM IV.

dph

+++++++++++++++++++++++++++

From: [e-mail] (Doug McNaught)
Date: 3 May 92 06:20:25 GMT
Organization: California Institute of Technology

In article <[e-mail]> [e-mail] (David Heddle) writes:


   Dear Friends

   Apologies for what must be a set of FAQs. However, I am stuggling to understand
   the file manager. Here are my questions:

   1) What is the definition of a "working" directory? Is it equivalent to
   what  "pwd" would
       give me in Unix or what "SHOW DEFAULT" would give me in VMS?

Working directories are a hack for backward compatibility with non-HFS
aware programs. They're still around because the pre-system 7 Standard
File Package creates them when a file is selected.

   2) Assuming that the working directory is as implied by an affirmative
   response to
       the previous question, what does it mean to "create"  (or is it
   "open", I don't have
      IM IV at hand) a working directory? Is that equivalant to "cd" (unix)
   or "SET DEFAULT"
     VMS? If so, what about the previous Working Directory?? Is there only
   one at a time?

There's no reason to open a WD yourself. The way backward
compatibility is maintained is that WD reference numbers can always be
used in place of volume reference numbers in the old File Manager
calls. So, when the user chooses a file with SFGetFile, the SF
package creates a WD and passes its refNum back to your program, which
can use it just like a vRefNum. There really isn't a Unix-style cwd
since all the File Manager calls to create, open, and stat files take
a name and a v(WD)RefNum.

   Questions 3-5 are practical in nature:

   3) How do I get an ID for the present Working Directory? The things that
   I have tried
       seem to give me only the ID of the root (i.e. the hard disk )

What have you tried? By ID do you mean a WDRefNum or a dirID (they're
two different things). Again, there isn't really a cwd in the Unix
sense. If you want to find out the directory that your app started
from, that can be done--I think (not sure) that GetVol at startup will
return a WDRefNum for you.

   4) How do I get the names (partial path) of all the files and  folders
   (but no their
       contents -- i.e. just the folder names) of the present working
   directory?

There are two ways. The simplest conceptually is to call PBGetCatInfo
on your working directory using the ioFDirIndex field of the
CInfoPBRec, after first getting the 'valence' of the directory itself
with another call to PBGetCatInfo. The indexing calls will return info
about each object in the directory, including whether it's a file or a
directory, the size (for files), creation and modification dates, etc.
It'll also return the name of the object (file or directory).

   5) How can I find the ID of the parent and the IDs of the offspring of the
       present working directory?

PBGetCatInfo again.

   Any help is greatly appreciated! The real bottom line is that, while iI
   have no doubt
   that the fault is mine, I  cannot feel comfortable with the File Manager
   chapter
   in IM IV.

That chapter is a bear! I've struggled with this stuff recently, so
mail me if you have questions or want sample code. I decided to go
ahead and post instead of mailing you because this is something that a
lot of people have trouble with. Other good references are the FAQ
list available by ftp from ftp.cs.uoregon.edu, and the Usenet Mac
Programmer's Guide, available at Sumex, as well as the excellent
sample code and TechNotes at ftp.apple.com.

- -doug
- --
Doug McNaught              |"Sadder still to watch it die/ Then never to have
[e-mail]      | known it/ For you, the blind who once could see/
[e-mail] | The bell tolls for thee..." --Neil Peart
  Nobody approves my opinions! Not even me, sometimes. Read at your own risk.

+++++++++++++++++++++++++++

From: [e-mail] (Matthew T. Russotto)
Date: Mon, 04 May 92 14:23:54 GMT
Organization: College of Engineering, University of Maryland, College Park

In article <[e-mail]> [e-mail] (David Heddle) writes:
>Dear Friends:
>
>Apologies for what must be a set of FAQs. However, I am stuggling to understand
>the file manager. Here are my questions:
>
>1) What is the definition of a "working" directory? Is it equivalent to
>what  "pwd" would
>    give me in Unix or what "SHOW DEFAULT" would give me in VMS?

No-- a 'working directory' is a structure which looks like a separate
volume to old file manager calls.  It is there to allow compatibility
between MFS (flat file directory) and HFS

>Questions 3-5 are practical in nature:
>
>3) How do I get an ID for the present Working Directory? The things that
>I have tried
>    seem to give me only the ID of the root (i.e. the hard disk )

HGetVol will get you the reference number of the current volume, plus
the directory ID of the current directory.  That is enough to fully
specify the current directory

>4) How do I get the names (partial path) of all the files and  folders
>(but no their
>    contents -- i.e. just the folder names) of the present working
>directory?

Use GetCatInfo in indexed mode.  Set DirID and vRefNum to 0 to use the
default directory.

>
>5) How can I find the ID of the parent and the IDs of the offspring of the
>    present working directory?

GetCatInfo again.


- --
Matthew T. Russotto    [e-mail]    [e-mail]
Some news readers expect "Disclaimer:" here.
Just say NO to police searches and seizures.  Make them use force.
(not responsible for bodily harm resulting from following above advice)

---------------------------

From: [e-mail] (Robert Hess)
Subject: CTB Examples in C?
Date: 1 May 92 00:02:22 GMT
Organization: Independent Consultant

Anyone know where I can find some CTB examples written in C? I looked on
ftp.apple.com and found a couple of things but I'd like more. MUCH more.

I can't ftp, so if someone could send stuff to me I'd really appreciate it.

Robert Hess
AppleLink:ENDPOINT
AOL:RHessJr
CIS:71641,1376

+++++++++++++++++++++++++++

From: [e-mail] (Brian Hall)
Date: 1 May 92 02:28:43 GMT
Organization: Netcom - Online Communication Services  (408 241-9760 guest)

[e-mail] (Robert Hess) writes:

>Anyone know where I can find some CTB examples written in C? I looked on
>ftp.apple.com and found a couple of things but I'd like more. MUCH more.

>I can't ftp, so if someone could send stuff to me I'd really appreciate it.

>Robert Hess
>AppleLink:ENDPOINT
>AOL:RHessJr
>CIS:71641,1376

APDA sells some examples, and if you *really* want to spend some money,
it is possible to license the source to MacTerminal for some thousands
of dollars - contact SW.LICENSING on AppleLink for more info on that.

- --

 \ | /   | Brian Hall                 [e-mail]
 - : -   | Mark/Space Softworks       Applelink: markspace
  /|\    |                            America Online: MarkSpace
 |-+-|   |
/-\|/-\  | People don't kill people, toasters kill people.

+++++++++++++++++++++++++++

From: [e-mail] (Paul G. Smith)
Date: 1 May 92 19:03:49 GMT
Organization: CommsTalk HQ


In article <3j-k=[e-mail]> (comp.sys.mac.programmer), [e-mail] (Brian Hall) writes:
> APDA sells some examples, and if you *really* want to spend some money,
> it is possible to license the source to MacTerminal for some thousands
> of dollars - contact SW.LICENSING on AppleLink for more info on that.
>

Yes, but... the source code examples APDA sells are written in Pascal. The
source to MacTerminal 3 is in Pascal too - MacTerminal 3 is based on MacApp
2.0 and all the source code is Object Pascal.

One small C example is within SuperSurfer, a modified version of the APDA-
distributed CTB example program. Unfortunately, only a few small bits (mostly
the parts dealing with the terminal window scrollback area) are written
in C: the remainder is a hacked copy of the original Pascal program.

You might try to look for the 'Sessions' demo, one of the System 7 example
projects (James Beninghaus of Mac DTS was the author, I think). It is on
some of the Developer CDs, and may be on Apple's FTP server. This was (if
I remember right - I've not looked at it for a long time) written in C++.

best regards, Paul

- -------------------------------------
Paul G Smith / CommsTalk HQ
INTERNET:  "[e-mail]"            CIX:  "pgsmith"
AppleLink: "commstalk.hq" ("[e-mail]")
tel/fax:   + 44 491 574295  (dial 11 on 2nd dial tone for fax)
snail:    40 St Marks Road, Henley-on-Thames, Oxon. RG9 1LW. UK

+++++++++++++++++++++++++++

From: [e-mail] (Peter Creath)
Date: 3 May 92 23:03:44 GMT
Organization: Cube Technologies


In article <[e-mail]> (comp.sys.mac.programmer), [e-mail] (Paul G. Smith) writes:
> In article <3j-k=[e-mail]> (comp.sys.mac.programmer), [e-mail] (Brian Hall) writes:
> > APDA sells some examples, and if you *really* want to spend some money,
> > it is possible to license the source to MacTerminal for some thousands
> > of dollars - contact SW.LICENSING on AppleLink for more info on that.
>
> One small C example is within SuperSurfer, a modified version of the APDA-
> distributed CTB example program. Unfortunately, only a few small bits (mostly
> the parts dealing with the terminal window scrollback area) are written
> in C: the remainder is a hacked copy of the original Pascal program.

Also, Terminal 2.0 and 2.2 (both written in C and distributed with
source code) are able to utilize the Comm Toolbox.  They should be
up on sumex.

- ----------------------------------------------------------------------------
Peter Creath                 "When I was a boy I was told that anybody could
[e-mail]   become president; I'm beginning to believe it."
                                                           -- Clarence Darrow

+++++++++++++++++++++++++++

From: [e-mail] (Jess M Holle)
Date: 4 May 92 23:45:42 GMT
Organization: Purdue University Engineering Computer Network

I may have missed someone mentioning this, but are there any freely
available (via ftp) sample programs written in C that use the
terminal manager portion of the CTB?

Thanks,
Jess Holle

---------------------------

From: [e-mail] (Mark P. Richards)
Subject: PD online references ?
Date: 4 May 92 15:27:39 GMT
Organization: University of Waterloo

I am aware of two online reference programmes for the ToolBox:
Think C Reference, and Online Companion.  Does anyone know about
a public domain online reference programme ?  And if not, which
of these two is the best ?

+++++++++++++++++++++++++++

From: [e-mail]
Date: 4 May 92 16:29:56 GMT
Organization: Campus Computing Sites, University of Michigan-Ann Arbor

In article <[e-mail]> [e-mail] (Mark P. Richards) writes:
>I am aware of two online reference programmes for the ToolBox:
>Think C Reference, and Online Companion.  Does anyone know about
>a public domain online reference programme ?  And if not, which
>of these two is the best ?
>
    Apple provides as a set of Hypercard stacks called "Spinside Mac"
which offer "online" reference to all of Inside Mac volumes I-VI.  If you
don't mind giving up the disk space & memory that these require, they work
pretty well.

    I, on the other hand, prefer using the other tools you mentioned
along with 411 (when I'm in MPW).  Programmer's Online Companion is GREAT
since usually I just need a parameter list to a call (that's all you get,
along with structs, etc.).  If I need more information, then I turn to
Think Reference to see if I can find whgat I need there - also VERY useful
on my PowerBook when I'm on a plane.

    Just my opinion....


- --
- -----------------------------------------------------------------------
Leonard Rosenthol          Internet: [e-mail]
Director of Advanced Technology   AppleLink: MACgician
Aladdin Systems, inc.          GEnie:     MACgician

---------------------------

From: [e-mail] (Henry Van Tunen)
Subject: IIfx ROM not 32 bit clean
Date: 1 May 92 00:50:09 GMT
Organization: MIND LINK! - British Columbia, Canada

While testing my app, a bus error occurred when I tried to use the contents of
the low memory global "CurActivate". The value stored there looked like it had
the high bit set. Using MacsBug, I step spied that location and "discovered"
the following code in the Macintosh IIfx ROM:

 Disassembling from 40815C54 (Macintosh IIfx ROM)
  _TickCount
     +025E  40815C5C   LSR.W      #$1,D0
     +0260  40815C5E   BCC.S      _TickCount+0270
     +0262  40815C60   BSET       #$07,CurActivate   <<< ouch!
     +0268  40815C66   MOVEQ      #$FF,D1
     +026A  40815C68   RTS

As you can see, at address $40815C60, it is setting the high bit of
CurActivate! My guess is the Window Manager is using this bit as a flag.

This bug only happens when you try to use CurActivate when you are processing
a suspend/resume event. All other times, the value stored there seems to be
OK.

I know I shouldn't be mucking with low memory globals so I have modified my
code accordingly. My concern was that there might be other little "features"
like this waiting to bite someone.

To summarize, this means the ROMs in the IIfx aren't true 32 bit clean. This
same problem exists on the IIsi and IIcx (which I believe isn't 32 bit clean
anyway).

I am running System 7.0 and TuneUp 1.1.1 on a Mac IIfx, 8 Meg RAM

+++++++++++++++++++++++++++

From: [e-mail] (Lawrence D'Oliveiro, Waikato University)
Date: 1 May 92 17:51:31 +1200
Organization: University of Waikato, Hamilton, New Zealand

In article <[e-mail]>, [e-mail] (Henry Van Tunen) writes:
>      +0262  40815C60   BSET       #$07,CurActivate   <<< ouch!

Granted that might not be a 32-bit-clean thing to do, but it is at least
31-bit-clean, and I assume that there is code in Get/WaitNextEvent to
strip off this bit before returning the window address.

I recall some Apple people quoting the maximum addressable memory in
32-bit-clean systems as 2GB rather than 4GB. This may be one of the
reasons. Another reason would be all those applications inadvertently
using signed instead of unsigned comparisons on block sizes, so as soon
as one of them runs on a machine with more than 2GB of available memory,
it's going to fail with a "not enough memory" error!

On the other hand, are you running in 32-bit mode? If not, maybe the Toolbox
does something different in that situation.

Lawrence
who knows that, as soon as he reaches the stage where 2GB of memory
isn't enough, it'll be the end of the 32-bit era.

+++++++++++++++++++++++++++

From: [e-mail] (Steve Christensen)
Date: 5 May 92 02:33:55 GMT
Organization: Apple Computer Inc., Cupertino, CA

[e-mail] (Henry Van Tunen) writes:

>While testing my app, a bus error occurred when I tried to use the contents of
>the low memory global "CurActivate". The value stored there looked like it had
>the high bit set...
>...  My guess is the Window Manager is using this bit as a flag.

>From looking at the source code (which is in the Event Manager, by the way),
that bit is only being set when an activateEvt for that window has been
generated, so that WindowPtr is no longer valid nor used by the system.

>To summarize, this means the ROMs in the IIfx aren't true 32 bit clean. This
>same problem exists on the IIsi and IIcx (which I believe isn't 32 bit clean
>anyway).

Well, yes and no.  This could be a problem if you had a system with more than
2GB installed and the window data structure was stored in memory above the
2GB mark.  In that case the OS would have a problem handling window activations
and deactivations, but it wouldn't crash.  For all other cases it will work
correctly because the only time that bit is set is when the OS is done with
that address and will not use it further.  For this case, the ROM is "31-bit
clean", although in general the ROM really is 32-bit clean...

steve

- --
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  Steve Christensen            Never hit a man with glasses.
  [e-mail]            Hit him with a baseball bat.

---------------------------

From: [e-mail] (georges milette)
Subject: Learn c on the mac
Organization: International Shared Information Service (Ottawa)
Date: Mon, 04 May 92 14:49:29 GMT

Anyone knows the answer on page 140 , exercise 2 and 3 in dave mark's boos
"learn C on the Macintosh. I've asked this question on many BBS's and
all I've gotten so far are other codes that gives me prime numbers..I know
there's even some others later in the book (the disquette is included
with a demo version of think c called thin c). I'd like the solution to
THESE EXERCISES, not another alternate prime number code.
        Any answer concerning this one will be greatly appreciated..
Thanks


+++++++++++++++++++++++++++

From: [e-mail] (Brian Kendig)
Date: 4 May 92 19:23:34 GMT
Organization: Starfleet Academy, Princeton University

In article <[e-mail]> [e-mail] (georges milette) writes:
>Anyone knows the answer on page 140 , exercise 2 and 3 in dave mark's boos
>"learn C on the Macintosh.

Well, I don't know the answer, but then again I'm not just anyone. ;)
Could you post the question here, so I can take a jab at it?

     << Brian >>

- --
| Brian S. Kendig       --/\-- Tri     [e-mail], @PUCC
| Computer Science BSE  |/  \| Quad  You gave your life to become the person
| Princeton University  /____\ clubs    you are right now.  Was it worth it?

---------------------------

From: [e-mail] (Stephen Jonke)
Subject: Hack to autocomment in Think C 5.0???
Date: 1 May 92 19:30:45 GMT
Organization: NASA Goddard Space Flight Center

Is there a hack in existence that gives you a command key (or
preferably a menu item with a keyboard shortcut) that will
automatically comment out the selected lines in a source file while
using Think C 5.0?  I seem to recall that Think Pascal had a menu
item that would do this, but it seems to be missing in Think C.

Even if it were a stupid hack, such that it didn't pay attention to
see if there were any comments within the selected lines, it would
still be a useful thing.

PLEASE E-MAIL ALL RESPONSES!  EITHER REPLY TO THIS MESSAGE VIA EMAIL,
OR SEND MAIL TO:  [e-mail]

Steve

+++++++++++++++++++++++++++

From: [e-mail] (Carl W. Haynes III)
Date: 1 May 92 23:27:41 GMT
Organization: Purdue University Computing Center

In article <[e-mail]> [e-mail] (Stephen Jonke) writes:
>Is there a hack in existence that gives you a command key (or
>preferably a menu item with a keyboard shortcut) that will
>automatically comment out the selected lines in a source file while
>using Think C 5.0?  I seem to recall that Think Pascal had a menu
>item that would do this, but it seems to be missing in Think C.

PopUpFuncs has a command to let you do this. It is a commercial
add-on to Think C (and MPW, I think) whose main purpose is to
provide you with a menu of functions in your unit. (the same idea
as cmd-clicking the title bar in Think Pascal).

I think it's about $45.00 from
SciComp Software
1-800-522-5939
2912 Claremont Ave. #21
Berkeley, CA 94705

carl
[e-mail]
AOL: CWH3


+++++++++++++++++++++++++++

From: Laurie Kirchmeier <[e-mail]>
Organization: Office of Instructional Tech./ Univ of Michigan
Date: Mon, 4 May 92 13:58:04 GMT

CMaster is another commercial extender for THINK-C which does
autocommenting and
much much more. It's cost about $80 and is available from

  Jersey Scientific
  545 Eighth Ave
  New York NY 10018
  Tel. [phone]

+++++++++++++++++++++++++++

From: Laurie Kirchmeier <[e-mail]>
Organization: Office of Instructional Tech./ Univ of Michigan
Date: Mon, 4 May 92 13:57:08 GMT

CMaster is another commercial extender for THINK-C which does
autocommenting and
much much more. It's cost about $80 and is available from

  Jersey Scientific
  545 Eighth Ave
  New York NY 10018
  Tel. [phone]

---------------------------

From: [e-mail] (Ramon M. Felciano)
Subject: Q: Flip-wipe from one PICT to another
Date: 5 May 92 00:00:46 GMT
Organization: SUMMIT (Stanford Univ. Medical Media and Information


Hi!

I'm trying to make an About box that does a wipe transition from one
color PICT to another. I'd like to do a simple horizontal or vertical
flip (looks like you're flipping a card over). Does anyone know how to do
this, or know where I might find some sample code?

I know the book "Graphics Gems Vol 1" describes a way to do a fade in,
but I haven't found anything on this kind of flipping.

Ramon M. Felciano
Associate Director, SUMMIT
Stanford University Medical Media and Information Technologies

+++++++++++++++++++++++++++

From: [e-mail] (Lawrence D'Oliveiro, Waikato University)
Date: 6 May 92 00:54:37 GMT
Organization: University of Waikato, Hamilton, New Zealand

Can you explain a bit more about the sort of effect you're trying to achieve?
I can think of three possibilities. Assume the first image is represented
by "123456789" and the second one by "ABCDEFGHI", which of the following
four sequences represents the effect you want?

Wipe:

    123456789
    123456GHI
    123DEFGHI
    ABCDEFGHI

Scroll on:

    123456789
    123456ABC
    123ABCDEF
    ABCDEFGHI

Scroll off:

    123456789
    456789GHI
    789DEFGHI
    ABCDEFGHI

Push:

    123456789
    456789ABC
    789ABCDEF
    ABCDEFGHI

A sort of "peeling off" effect (Premiere calls this "Roll Away"):

    123456789
    123987GHI
    654DEFGHI
    ABCDEFGHI

Actually there are other variations possible (besides the obvious horizontal
reversals of the above effects), but these five seem the most reasonable ones.
The first four are pretty easy to do with just a few QuickDraw calls; the last
one is more work, because it involves flipping the pixels around.

So, which of the six was it you wanted?

Lawrence D'Oliveiro                       fone: [phone]
Computer Services Dept                     fax: [phone]
University of Waikato            electric mail: [e-mail]
Hamilton, New Zealand    37^ 47' 26" S, 175^ 19' 7" E, GMT+13:00
There are two types of people in the world: those who divide people into
two types, those who don't, and those who can't count.

+++++++++++++++++++++++++++

From: [e-mail] (Christopher Tate)
Date: 5 May 92 04:10:13 GMT
Organization: Penn State University

In article <[e-mail]>,
[e-mail] (Ramon M. Felciano) says:
>
>I'm trying to make an About box that does a wipe transition from one
>color PICT to another. I'd like to do a simple horizontal or vertical
>flip (looks like you're flipping a card over). Does anyone know how to do
>this, or know where I might find some sample code?

How 'bout just set up offscreen buffers (GWorlds are your friend!) to
hold images of each "side" of the card, and then successively CopyBits()
the image into narrower and narrower rectangles, erasing the outside
edge as you go?

(Based on the fact that the flat projection of a card seen at a non-
orthogonal angle looks "compressed" -- you're just getting CopyBits() to
do your compression for you.)

- -------
Christopher Tate     | Cryptogram #25:
[e-mail] |
[e-mail]  | "AUBE IBPB CQHA JPGYZMPE NJHAXBZ, SJZG JS
- ---------------------|  IMWFYZK MZG GJKH MZG *VUPYHAXMH MZG AUB HZJI."
"*" == proper nouns  |             -- "M VUYWG'H *VUPYHAXMH YZ *IMWBH"

---------------------------

From: [e-mail] (Steve Berkley)
Subject: Repost: How to get Superdrive into MFM mode?
Date: 2 May 92 02:31:40 GMT
Organization: University of Rochester - Rochester, New York

I got no response in the last couple of weeks so I thought I'd
repost my question:

I am writing a disk imaging program that reads in IBM/Ensoniq
diskettes (10 sectors per track).  The reads to the sectors are
accomplished with PBRead, but the diskettes are being read in at
8-12 sectors per track, according to apple's floppy scheme.
I need to know what call or control to use to get the superdrive
to kick into MFM mode, reading and writing at 10 sectors per track.
Any information on detection of a Superdrive would be appreciated
as well.  I could not find anything on this in the Apple Tech Notes,
nor in IM I-V.

- -Steve Berkley
[e-mail]

+++++++++++++++++++++++++++

From: [e-mail] (Matthew T. Russotto)
Date: Mon, 04 May 92 14:16:36 GMT
Organization: College of Engineering, University of Maryland, College Park

In article <[e-mail]> [e-mail] (Steve Berkley) writes:
>I got no response in the last couple of weeks so I thought I'd
>repost my question:
>
>I am writing a disk imaging program that reads in IBM/Ensoniq
>diskettes (10 sectors per track).  The reads to the sectors are
>accomplished with PBRead, but the diskettes are being read in at
>8-12 sectors per track, according to apple's floppy scheme.
>I need to know what call or control to use to get the superdrive
>to kick into MFM mode, reading and writing at 10 sectors per track.
>Any information on detection of a Superdrive would be appreciated
>as well.  I could not find anything on this in the Apple Tech Notes,
>nor in IM I-V.

Hmm, I thought I responded to this:  the tech note "What your .Sony
drives for you" tells you how to detect a SuperDrive.  I don't know
how to force one to MFM mode, but if you are successfully reading from
the disk at all you ARE in MFM mode.


- --
Matthew T. Russotto    [e-mail]    [e-mail]
Some news readers expect "Disclaimer:" here.
Just say NO to police searches and seizures.  Make them use force.
(not responsible for bodily harm resulting from following above advice)

---------------------------

From: [e-mail] (Steve Jovanovic)
Subject: How can we "emulate" the Finder...?
Date: 27 Apr 92 21:18:19 GMT
Organization: Marquette University - Department MSCS

Hi Netters,

Does anyone know how the Finder implements iconic views, and
allows users to drag icons?  First, does the Finder use
GWorlds to keep track of each window's pixMap, so that fast
scrolling is no problem?  Or...does it keep track of the
position of each individual icon, and uses CopyBits() to
draw all of the icons in a window?

Related to this is how the Finder can tell when a user has
clicked on an icon.  BitMapInRegion()?

I'm developing a UI for the FilterTop project in which I'd
like to do some of the same types of things that the Finder
does, but I'm not sure how best to approach it.  I think using
GWorlds would cause a problem if users are running FT on a 24-
bit system.  Also, speed is an important concern.

Any advice greatly appreciated!  I'll summarize all responses.

Thanks for your time :-)

steve



- --
+----------------------+---------------------------+--------------------------+
| Steve Jovanovic      | Internet:  [e-mail] |     TopSoft, BABY!       |
| Marquette University +---------------------------+--------------------------+
| Computer Engineering |   Jesus Saves...Gretzky steals...Gretzky scores!!!   |

+++++++++++++++++++++++++++

From: [e-mail] (Matthew Xavier Mora)
Date: 5 May 92 00:14:25 GMT
Organization: SRI International


In article  Steve Jovanovic, [e-mail] writes:

>Does anyone know how the Finder implements iconic views, and
>allows users to drag icons?  First, does the Finder use
>GWorlds to keep track of each window's pixMap, so that fast
>scrolling is no problem?  Or...does it keep track of the
>position of each individual icon, and uses CopyBits() to
>draw all of the icons in a window?

I believe that the finder used to keep track of the icons location
in the desktop file. It probably still does. I'm sure it does not use any
offscreens for drawing since that would take up way too much memory.
In scrolling it probably just does a scroll rect and draws (by
copybitsing)
the icons that have moved into view.

>Related to this is how the Finder can tell when a user has
>clicked on an icon.  BitMapInRegion()?

It probably checks the click location with a list of object points. In an
old
prototyping program I wrote a long time ago in basic I just kept the
points
in an array. When a click happened in the window, I would scan the array
backwards (because the objects are layered from low to high in the array
thus the last object brought to the front or newly created would be the
last
item in the array) doing a ptinrect test for each object in the array. The
speed was acceptable in basic so I would imagine would be much better in
any
other language. Plus in pascal or c you could use linked lists and such.
If
you have a lot of objects you might want to save just a point. If you have
only a few objects you can keep track of the rect's or Rgn's.

The finder probably uses ptinrgn instead of ptinrect. Check out the
*.games.programmer groups for articles on "hit" detection. That would
probably be faster than the "get points/convertbitmaptorgn/ptinrgn" route.


- --

- ---------------------------------------------------------------------
- ------
|Matthew Mora
[e-mail] |
|SRI International
[e-mail] |
|"Selling skin, selling god, the numbers look the same on their credit
card."|
|                                        "Queensryche - Operation
Mindcrime" |

- ---------------------------------------------------------------------
- ------

---------------------------

End of C.S.M.P. Digest
**********************