Recent changes to support-requests

Unzip messing up palm os memory

Eduardo Thuler — Mon, 02 Sep 2002 16:04:49 -0000

Hi,

I have been using ZLib's unzip functions. It was a very
nice improvement for my software. It is used for a Sales
Force Automation program.

I receive the files via FTP and now I can download them
zipped. That gives us quite a saving in communication
costs.

I have realized that in some cases I can have un
improper use of the zip files and end up messing up
palm's memory system. What signals to me that it has
happened is that when I run the option "App/Delete"
from the palm's home and scroll the file list until its end I
get the error "Free Handle. MemoryMgr Line 4384".

I have created a function to encapsulate the unzip
function of a file stream and I am not sure whether the
problem may be in it. If you want me to send it to you,
just let me know.

Things have been going well, but right now, I have more
than 300 c505 IBM workpads in the field with users and
every time they try to receive data using the FTP they
get this error. My next step is collecting all devices and
reinstalling the program.

Do you have any idea that could help me in:

1 - Making sure that the problem doesn't happen any
more ?
2 - Trying to fix the memory after the problem has
happened ?

Thanks very much for any help you may give me,

Eduardo Thuler

Source for ZLib

Young Cho — Fri, 22 Mar 2002 21:57:31 -0000

Is there source code available for SysZLib.prc
anywhere? Thanks!

PalmZLib invlate problem

Anonymous — Tue, 27 Feb 2001 21:24:50 -0000

Dear developer of PalmZLib,

I am having trouble using the PalmZLib shared library
that I donwloaded from
http://palmzlib.sourceforge.net/. Here is some
background:

I built a windows Cygwin tool from the ZLib sources
(from zlib home), and use it to compress binary data
(windowBits=10;memLevel=6;strategy=default) using
Lz77. I then package the compressed file as a
resource of a .prc database, and HotSync it to the
handheld that is running PalmOS v3.5 (Handspring
Visor). On the handheld, I open PalmZLib and envoke
PalmZLib's ZLibuncompress function. For some reason,
I always get the Z_BUF_ERROR error code back from this
function, even though I pass in a much larger
destination buffer than the expected uncompressed
output. For example, I compressed a 2000 byte file
down to 906 bytes using my Cygwin tool. When calling
ZLibuncompress, I passed it a destination buffer of
16000 bytes and a source buffer of 906 bytes, and
still got Z_BUF_ERROR. Do you have any suggestions?
What is a good strategy for debugging this problem?

Thank you,

Vitaly Kruglikov

vkruglikov@handspring.com