Mac Forum / Programming / Mac Programming / March 2005

Hello NG
Sometimes after I have resized a cString with realloc and accessing
the first new allocated byte I get a SIGSEGV signal.
What do I have to do to prevent that. Do I have to check for

Can anyone suggest a library that can do Matrix math?  Specifically, I
need to do multiplication and inverses of 4x4 matrices.
I discovered BLAS, but it looks like it was written in the 1970s. :(
Thanks!

Hello NG
If I drag a animated gif from mail.app into my application
(NSTextView) the animation stops and also the font is changed to the
font that was set in mail.app. If i drag the gif into the finder first

I'm new to JAVA and Mac programming (previous experience limited to QBasic
on PC and some javascript) so perhaps I've missed a simple instruction
somewhere.
I installed the Developer Tools Package (OS X 10.3.8 'update') which

Howdy,
I'm trying to install a callback in a faceless quicktime app I'm
developing in Codewarrior using Carbon. For the life of me I can't get
it to work.

After making several settings changes to one of my (bigger) projects,
all non-null NSStrings appear as "invalid" in the Xcode debugger. They
still print their correct values via the console, but invalid in the
GUI.  "Generate Debug Symbols" is on, and "Level of Debug Symbols" is

I'm a Perl programmer and been using  MacOS classic since 1998.
I don't have spending money so I ain't gonna buy Mac X for the moment.
Now, I'd like to code a MacOS9 app that captures audio from an external
microphone and convert the audio in MP3 format then finally streams the

Can I use the Carbon call to LaunchApplication to launch an application
which the Finder calls a Unix Application?
Double-clicking on it works OK.
However LaunchAplication returns -43, file not found.

Alright, I've been wrestling with this for some time and I'm thoroughly
puzzled.
Everything I've ever seen says when you are playing a quicktime movie
(I'm actually writing software to play tracks off a CD, and I don't need

I'm trying to get the pixel length of a string to display it centered in
a rect. Can't find anything - help.
I suppose there's nothing like Windoze
dc->DrawText(s, -1, r, DT_CENTER);

When I send a string to printf, it gets buffered.  It won't actually
print until I send a \n character.  Is there anything else I can do to
force it to print its buffer?
Also, is there a way to backspace, or to go up a line, on the console?

Can anyone tell me what would be involved in migrating from
LOpenTptTCPEndpoint to BSD sockets in a MachO application? Would it be
as simple as creating a new LTCPEndpoint subclass for BSD?
I'm not familiar with BSD sockets yet, so any hints, sample code, or

I'm trying to separate my code into multiple projects in XCode:
one library (aka BSD dylib library) with some header files, and
another project (like C commandline tool) which needs to reference
the header files and link with the dylib.

I want to run a simulation program on a UNIX machine but
do post processing and control from the Mac.  Anybody have any idea to do this?
Thanks in advance.

I am currently trying to get the icons of the currently mounted volumes with
the code below in my carbon application.
It works fine and lists all the drives and correct icons (network, hard
disks and cd roms) apart from my startup volume which it displays a the