OK, what the guys are doing, is taking very large log files from a unix machine. They FTP them onto their PCs, and compress them using zip. They then give the log files to our engineers who have to make sense of them. This is when they run my parser on the file. At the moment, they have to uncompress the file, then run my parser on it. Because the files are so large, they want to be able to run my parser on the zipped log file without unzipping it first.