Question

I am currently working on a simple server implemented in C.
Processing jpg files works fine, btu png’s give me a segmentation fault. I never get past this chunk of code. Why this might be?

fseek (file , 0 , SEEK_END);
lSize = ftell (file);
rewind (file);

Thanks.

Answer 1

It’s far more likely that you were accessing those arrays in a problematic fashion. Check the logic in your buffering code. Make sure you have your buffer sizes #define’d in a central location, rather than hardcoding sizes and offsets. You made it quit crashing, but if you missed an underlying logic error, you may run into mysterious problems down the road when you change something else. It is probably worth your time to deliberately break the program again and figure out WHY it’s broken. As others have suggested, a debugger would be an excellent idea at this point. Or post a more complete example of your code.