application seems to eat up memory

[priceey]

hello

I am a little bit of a noob here, so please forgive me if i am posting this all wrong.

i have quite a hefty QT application that seems to eat up memory, then get slower and slower.

Posting code will be difficult as its quite large.

i have run valgrind and the only errors i can see are related to qt libraries.

Does anyone have some ideas as to where i can look at problem items?

i am opening and parsing a few files, but i am pretty sure i close them when finished before opening others.

essentially i am parsing a script file, which in turn open up other script files to process some data.

i am reading some lines of code using memset.

does this automatically delete itself? (its in a loop as such so i think that it gets re-written each time around.

for instance

memset(buff, 0, 1024);
  numBytes = scriptfile.readLine(buff,100);
  buff[39] = '\n'; 
  memset(&buff[40], 0, 1024-40);

memset(buff, 0, 1024);
  numBytes = scriptfile.readLine(buff,100);
  buff[39] = '\n'; 
  memset(&buff[40], 0, 1024-40);

To copy to clipboard, switch view to plain text mode 

will this re-write the buffer each time??

any clues as to how i can debug this will be grateful.

i know its a bit vague, but the application is quite large and i have no idea where the problem section could be.

thanks in advance

P